Journals >Experiment Science and Technology
Contents
2024
Volume: 22 Issue 4
26 Article(s)
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Experimental Design for the Determination of Sulfonamide Drugs in Water Using Liquid-Liquid Microextraction Combined with High Performance Liquid Chromatography
Shucai LIANG, Xiaoyan LIAO, and Yi LIU
With the concept of green analytical chemistry, an experiment on the determination of sulfonamide drugs in water using liquid-liquid microextraction combined with high-performance liquid chromatography(HPLC) is designed for undergraduate experimental teaching. With a small amount of organic solvents in liquid-liquid exWith the concept of green analytical chemistry, an experiment on the determination of sulfonamide drugs in water using liquid-liquid microextraction combined with high-performance liquid chromatography(HPLC) is designed for undergraduate experimental teaching. With a small amount of organic solvents in liquid-liquid extraction and ethanol as the green organic mobile phase for chromatographic separation, the extraction and separation conditions are optimized, and a new method of liquid-liquid microextraction combined with HPLC has been developed for determining sulfonamide drugs (sulfaguanidine(SG), sulfamethoxazole(SD), sulfamethoxazole(SDM), sulfamethoxazole(SMZ) and sulfamethoxazole(PST)) and trimethoprim(TMP, a commonly used compatible drug for sulfonamide drugs). The results indicate that the linear measurement ranges are 10~1000 μg/L for SG, SD, SDM and SMZ, and 100~1000 μg/L for TMP and 50~1000 μg/L for PST, respectively. The detection limits are in the ranges of 50~100 ng/L (S/N=3). The recovery rates of the lake water sample are between 93.6% and 105.2%. This experiment is based on the forefront of analytical chemistry and is moderately difficult. It is suitable as a researching experiment for senior undergraduate students majoring in chemistry, pharmacy and environment, which is beneficial for students to improve their innovation ability, low-carbon awareness and comprehensive quality..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 1 (2024)
Design of Sample Preparation Mold Satisfying the Measurement of Internal Environmental Parameters
Zhaopeng ZHANG, Yihang LI, Yang LIU, Ting AI... and Lanbin ZHANG|Show fewer author(s)
With the increasing of engineering activities such as deep resource exploitation and deep space utilization, geotechnical engineering encounters more and more problems and challenges of rock mechanics in complex environments. It is urgent to develop rock mechanics testing research under high temperature and high pressuWith the increasing of engineering activities such as deep resource exploitation and deep space utilization, geotechnical engineering encounters more and more problems and challenges of rock mechanics in complex environments. It is urgent to develop rock mechanics testing research under high temperature and high pressure in-situ environment, and the rock mechanics test is required to have more accurate and more dimensional data measurement and collection capabilities. Therefore, this paper designs a sample preparation mold that meets the requirements of the measurement of the internal environmental parameters in the sample, and provids a pouring method for presetting buit-in sensors and signal transmission channels. Finally, several concrete samples with buit-in temperature sensors and signal transmission channels are prepared, and the buit-in sensors transmit signals normally through the wire, which indicates that the sample preparation mold meet the test requirements for the measurement of internal environmental parameters. The sample pouring mold is easy to operate, the preset sensor position is adjustable, and it can be used with a variety of buit-in sensors, which is operability, feasibility and applicability. Application of this device will be conducive to the development of more high-precision and multi-dimensional rock mechanics tests..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 7 (2024)
X-ray Detection Efficiency Study Based on Silicon Pixel Detector
Jun LIU, Chenfei YANG, Shengtai LI, Qiang YUAN... and Xiangming SUN|Show fewer author(s)
X-ray detector has experienced the era of the gas detector and the scintillator detector, and entered the era of semiconductor detector. As a new type of a semiconductor detector, the silicon pixel detector has the characteristics of high resolution, high detection efficiency, fast time response and low power consumptiX-ray detector has experienced the era of the gas detector and the scintillator detector, and entered the era of semiconductor detector. As a new type of a semiconductor detector, the silicon pixel detector has the characteristics of high resolution, high detection efficiency, fast time response and low power consumption. In order to study the detection efficiency of silicon pixel detector, an X-ray detection system is designed and the experimental research is conducted. Four kinds of X-ray energies of 4.51, 5.41, 6.40, 8.05 keV are tested. After error analysis and data processing, the detection efficiencies of frontal incidence are 53.00%, 51.56%, 40.65% and 29.91%, respectively. This experimental study provides a new approach for finding a X-ray detector with high detection efficiency ..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 13 (2024)
Experimental Study on Condensation Heat Transfer Performance of Vapor Condenser with Flat Finned Tube
Fangyu LU, Jian SHENG, Zhigang ZHOU, and Hua ZHANG
In order to study the heat transfer performance of vapor condenser with flat finned tube, an experimental system of vacuum cooling vapor condenser is designed and its heat transfer performance is tested. The system runs for about 450 s, the simulated heat source temperature in the vacuum chamber drops from 80 ℃ to 25 ℃In order to study the heat transfer performance of vapor condenser with flat finned tube, an experimental system of vacuum cooling vapor condenser is designed and its heat transfer performance is tested. The system runs for about 450 s, the simulated heat source temperature in the vacuum chamber drops from 80 ℃ to 25 ℃, and the condensed water is about 2.9 kg. The experimental results show that the higher the evaporation power is, the more intense the water evaporation is. The peak cooling capacity of condensate steam in the water catcher is 45.0 kW, the peak heat transfer coefficient is about 53.68 W/(m2·K), and the average heat transfer coefficient is 38.34 W/(m2·K). Compared with the vapor condenser with smooth tube, the cooling time of vapor condenser with flat finned tube is shortened by 17% and the quality of condensed water is improved by 7.41%..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 19 (2024)
Research of Experimental Teaching Reform of Electrical Engineering Courses under the Background of “New Engineering”
Jianyong ZHAO, Yanxue YU, Min WU, Heng NIAN, and Dan SUN
Under the background of new engineering construction, the experimental system of electrical engineering courses needs to be reformed and optimized to meet the new requirements. Firstly, the present situation of experimental teaching of electrical engineering is analyzed, the current problems and disadvantages existing Under the background of new engineering construction, the experimental system of electrical engineering courses needs to be reformed and optimized to meet the new requirements. Firstly, the present situation of experimental teaching of electrical engineering is analyzed, the current problems and disadvantages existing in the experimental teaching is summarized, and the development trend of experimental teaching is analyzed. Then, the reform directions and measures are studied from the aspects of experimental teaching content, experimental platform, teaching mode, laboratory management, and evaluation system. Finally, the application of various reform directions in the experimental teaching of electric power and electronics in the college of electrical engineering of Zhejiang University is introduced, which provides a reference for the reform of the experimental teaching of electric engineering..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 25 (2024)
Interdisciplinary Comprehensive Experimental Teaching Practice in Biomedical Engineering
Xiangrong CHANG, Jie ZHOU, and Weili DENG
Based on the multidisciplinary nature of biomedical engineering, a comprehensive experimental teaching design is investigated. Using a project-based learning approach, a variety of experiments are conducted. A comprehensive experiment design is introduced on the topic of “The application of conductive hydrogel materialBased on the multidisciplinary nature of biomedical engineering, a comprehensive experimental teaching design is investigated. Using a project-based learning approach, a variety of experiments are conducted. A comprehensive experiment design is introduced on the topic of “The application of conductive hydrogel materials in flexible electronics and the human body”, including the preparation of conductive hydrogel, the evaluation of material performance, the detection of electrical signals on flexible electrode surfaces, and physiological signals analysis using Python. Furthemore, a “medical materials+” teaching system is developed, which integrates expertise in electronics, computer information processing, and materials science. The experimental arrangement breaks through the limitations of chapter experiments and effectively increases the depth and breadth of professional instruction by reflecting the intersection and integration of biomedical engineering disciplines..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 34 (2024)
Research and Practice of a Project-based Integrated Medical Engineering Practice Course System
Yitong CHEN, Jian CHEN, Luchuang ZHU, Jie WANG, and Jianbo WU
The integration of medical and engineering is an important development direction in the construction of new engineering disciplines, and the construction of the practical course system for medical and engineering integration is an important part of cultivating high-level medical and engineering interdisciplinary talentThe integration of medical and engineering is an important development direction in the construction of new engineering disciplines, and the construction of the practical course system for medical and engineering integration is an important part of cultivating high-level medical and engineering interdisciplinary talents. This article is based on the needs of cultivating outstanding innovative talents in the new era, and researchs a practical course system driven by project based integration of medical and industrial engineering. The practical course system of medical engineering integration is aimed at solving clinical medical engineering problems, driven by a continuous medical engineering integration innovation project, guided by innovative thinking in medical engineering, with full process practice as the main line, engineering innovation ability cultivation as the core, and diversified two-way evaluation and assessment as the closed-loop. Through the innovative practical teaching mode of interdisciplinary integration of medical engineering, it aims to achieve the integrated cultivation of students’ knowledge, ability, practice, innovation, labor, and other aspects to comprehensively enhance students' self-learning ability, practical ability, theoretical foundation, teamwork, innovation ability, and communication and expression..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 41 (2024)
Reform and Practice of Electromechanical System Control Experimental Courses under the Background of “New Engineering”
Xiaopeng LI, Zhihuai MIAO, Binbin WANG, and Hongquan LI
In view of the current teaching status of electromechanical system control experimental courses, combined with the new requirements for cultivating diversified and innovative outstanding engineering talents in “new Engineering”, a diversified electromechanical system control experimental teaching system with “strong foIn view of the current teaching status of electromechanical system control experimental courses, combined with the new requirements for cultivating diversified and innovative outstanding engineering talents in “new Engineering”, a diversified electromechanical system control experimental teaching system with “strong foundation, emphasis on analysis, knowledge transitions, and innovative design” has been constructed. A multi-dimensional experimental teaching model that uses the cutting-edge technology has been established to stimulate students’ interest, students design and think independently, teachers assist with guidance and inspiration, and multi-platform resources are used together. An all-round, multi-angle, and comprehensive experimental teaching evaluation system has been formed. Through the reform and practice of this experimental course, students’ learning enthusiasm is enhanced, which is conducive to students’ deep understanding and mastery of control knowledge, and further improves students’ knowledge application and scientific and technological innovation abilities..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 47 (2024)
Exploration and Practice of Improving “High-level, Innovation and Challenge” of Confirmatory Experiment under Blended Teaching Mode
Shaobin HU, Lingling GUO, and Xiaoshuang LIU
Taking the high-pressure property determination test of formation oil as an example, digital teaching resources are developed and an online virtual classroom is constructed. The online and offline blended teaching is used to break through the limits of teaching time and space, expand the experimental contents to cover Taking the high-pressure property determination test of formation oil as an example, digital teaching resources are developed and an online virtual classroom is constructed. The online and offline blended teaching is used to break through the limits of teaching time and space, expand the experimental contents to cover the processes of oil sampling, preparing, transferring, testing and analyzing. A part of the research on carbon dioxide oil flooding and storage mechanism is integrated to the experiment to closely follow the frontier research hotspots in the field of petroleum engineering, so as to improve the original confirmatory experiment to an exploratory experiment. A student-oriented flipped experiment teaching mode is constructed, in which a multi-dimentional assessment method of “teacher + students”, “process + results” and “normal + difficult” implemented in the stages of pre-class, at-class and after-class is used to evaluate the experimental score. These measures effectively solve some problems existing in the traditional experimental teaching, improve the “high-level, innovation and challenge” of the confirmatory experiment, and increase the “gold” content of the petroleum engineering experiment course..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 54 (2024)
Practical Course Design in Wireless Communication Principles
Pingping CHEN, Chongchong SU, and Liting GUO
In response to the predominant issue of traditional classroom-based teaching, this paper discusses the practical course design for “Wireless Communication Principles”. The course focuses on a communication system with two-dimensional images as input and output, covering modules such as source coding, channel coding, moIn response to the predominant issue of traditional classroom-based teaching, this paper discusses the practical course design for “Wireless Communication Principles”. The course focuses on a communication system with two-dimensional images as input and output, covering modules such as source coding, channel coding, modulation and channel modeling. Through student-driven design, it enhances the understanding of the fundamental information transmission processes and the impact of different channels, concurrently improving practical skills. In contrast to conventional practical courses, it emphasizes the design of the entire communication system. It introduces advanced low-density parity check(LDPC) coding technology from the 5G era, which deepens students’ understanding of communication systems and provides an intuitive experience of transmission performance. This approach offers new perspectives for cultivating practical talents in wireless communication..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 59 (2024)
Exploration and Practice of Plastic Processing Training Module Teaching in the First-class Curriculum Construction of Engineering Training
Hongzhe ZHANG, Bing XUE, Yande LIANG, and Xixing QIAN
The application of metal cold plastic forming in industrial manufacturing is very extensive and has played an important role in the development of multiple industries and fields in society. At present, there are common problems in the processing training content of metal cold plastic forming in engineering training couThe application of metal cold plastic forming in industrial manufacturing is very extensive and has played an important role in the development of multiple industries and fields in society. At present, there are common problems in the processing training content of metal cold plastic forming in engineering training courses in universities, such as insufficient or missing content, incomplete knowledge points, and single teaching methods. In order to enable students to master relevant content in engineering training courses, a “Metal Box Making” project has been designed. Through the Learning Pass network platform and a self-developed video interactive network platform, a blended online and offline teaching mode is adopted for implementation, with full process evaluation and collaborative evaluation between teachers and students, achieving the integrated cultivation of students’ knowledge, abilities, and qualities..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 66 (2024)
Comprehensive Chemical Experiment Design and Teaching Practice of Photocatalytic CO2 Reduction with Brookite TiO2/Cu2O Heterojunction
Gang CHENG, Zhangjing CHEN, and Jinyan XIONG
A comprehensive experiment for the photocatalytic CO2 reduction of brookite TiO2 (B-TiO2) has been designed. The pristine brookite TiO2 (B-TiO2), Cu2O and their composites B-TiO2-Cu2O have been synthesized. The structure, morphology, and optic absorption properties of the material have been analyzed by X-ray diffractomA comprehensive experiment for the photocatalytic CO2 reduction of brookite TiO2 (B-TiO2) has been designed. The pristine brookite TiO2 (B-TiO2), Cu2O and their composites B-TiO2-Cu2O have been synthesized. The structure, morphology, and optic absorption properties of the material have been analyzed by X-ray diffractometer (XRD), UV-visible diffuse reflectance spectra (DRS), and scanning electron microscope (SEM), and the qualitative and quantitative analysis of the CO2 reduction performance has been carried out by gas chromatography. The promotion effect of the formation of p-n heterojunction on the CO2 reduction has also been discussed. This comprehensive experiment has exercised students’ literature research and hands-on practical ability. Meanwhile, it is helpful for students to understand the frontier of photocatalysis issue and stimulate students’ interest in learning. It is of great help to students’ innovative thinking, rigorous scientific research attitude, and ability to analyze and solve problems. This experiment can be used as a comprehensive experimental teaching content for undergraduate students of grade three in the applied chemistry class, which lays a foundation for the teaching of graduation thesis..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 71 (2024)
Research of Innovative Undergraduate Experimental Teaching Based on Large-scale Research Instruments
Yuan CAO, Piao ZOU, and Shuang YAN
Large scientific research instruments are a manifestation of the advanced science and technology, an important prerequisite and hardware guarantee for cultivating innovative talents, and a precious resource for conducting high-level experimental teaching. In order to promote the cultivation of innovative research talenLarge scientific research instruments are a manifestation of the advanced science and technology, an important prerequisite and hardware guarantee for cultivating innovative talents, and a precious resource for conducting high-level experimental teaching. In order to promote the cultivation of innovative research talents and expand the content of undergraduate experimental teaching in biology and medicine, this study has designed a specific teaching plan for undergraduate experimental teaching around a flow cytometer. In order to address the classic “cell proliferation/cell cycle” problem, two different principle flow cytometric techniques are designed as comparative experiments. The practice has shown that teaching comparative experiments using a flow cytometer can deepen undergraduate students' understanding of the large scientific research instruments, cultivate their solid hands-on abilities, and stimulate their innovative thinking and research enthusiasm..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 79 (2024)
Virtual Simulation Experiment of Subcellular Localization Observation of Plant Protein
Qing HAN, and Dawei ZHANG
In order to realize the effective integration of the digital construction of experimental teaching and the cultivation of top innovative talents in biology, and solve the problems of the traditional experiment of the subcellular localization observation of plant protein, such as high experiment cost, insufficient numbeIn order to realize the effective integration of the digital construction of experimental teaching and the cultivation of top innovative talents in biology, and solve the problems of the traditional experiment of the subcellular localization observation of plant protein, such as high experiment cost, insufficient number of precision instrument sets and insufficient practical ability of students, the virtual simulation technology is used to develop the virtual simulation experiment of subcellular localization observation of plant protein in Chinese and English bilingual teaching. This virtual experimental teaching resource covers the preparation of Arabidopsis protoplast, protoplast transformation mediated by polyethylene glycol, fluorescence microscope observation and analysis of fluorescent protein localization and other experimental contents, creating a new experimental teaching model that combines scene, immersion and interaction. Through its application in undergraduate experimental teaching, it deepens students’ understanding of the protein function research experimental technology, improves the curriculum system of the general biology experiment, realizes the integration of scientific research practical training and experimental teaching, and cultivates students’ innovative ability, scientific research accomplishment and international competitiveness, which is an effective supplement to the traditional experimental teaching..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 84 (2024)
Innovative Design and Practice of Experimental Teaching System for First-class Computer Network
Guojia LI, Hongqi GUO, and Xiuqin LI
In view of the shortcomings of computer network experimental teaching, a “three-level” curriculum experimental teaching system is constructed, which consists of professional experiments, advanced experiments and comprehensive innovative practice. The experimental teaching content embodies “high-level, innovative and chIn view of the shortcomings of computer network experimental teaching, a “three-level” curriculum experimental teaching system is constructed, which consists of professional experiments, advanced experiments and comprehensive innovative practice. The experimental teaching content embodies “high-level, innovative and challenging degree”. The experimental content fully supports the goal of cultivating students' ability to solve complex engineering problems. Through the teaching practice of progressive experimental teaching mode and multi-dimensional comprehensive evaluation method, it is verified that the new experimental teaching system has a obvious enhancement on improving students’ ability to solve complex engineering problems..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 90 (2024)
Design of Comprehensive Experiment on Soil and Fertilizer Sciences
Shuang YANG
Cold brown calcic soils, the major farmland soil type, in the middle reach of the Yarlung Zangbo River valley was selected as the experimental object, and then the main experimental items of soil and fertilizer sciences were systematically integrated to design a comprehensive experiment. Through the scientific design oCold brown calcic soils, the major farmland soil type, in the middle reach of the Yarlung Zangbo River valley was selected as the experimental object, and then the main experimental items of soil and fertilizer sciences were systematically integrated to design a comprehensive experiment. Through the scientific design of comprehensive experiment, the students can not only master the determination methods, grading standards and relationship of the main physical and chemical indexes of soil, but also discuss the agricultural production characteristics of cold brown calcium soil according to the result of soil samples, so as to serve the local agricultural production practice. This comprehensive experiment design combined education, research and production practice, which not only trained the students’ experimental operation skills, but also improved their comprehensive analytical ability, and achieved good experimental teaching effect..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 96 (2024)
Design and Practice of Experimental Teaching Exploration Based on Mud Refrigeration for Gas Hydrate
Lili QU, Rui JIA, Yuan WANG, Weiwei LIU, and Shuai ZHAO
Natural gas hydrates are easily decomposed in the process of drilling cores because of an increase in temperature, so it is necessary to control the temperature of drilling mud in the mud refrigeration system below 0 ℃ to inhibit the decomposition of hydrate. Heat exchanger is the core equipment of the mud refrigeratioNatural gas hydrates are easily decomposed in the process of drilling cores because of an increase in temperature, so it is necessary to control the temperature of drilling mud in the mud refrigeration system below 0 ℃ to inhibit the decomposition of hydrate. Heat exchanger is the core equipment of the mud refrigeration system, and selecting a suitable heat exchanger structure is the key to obtain low temperature mud. The three key parameters of the minimum mud outlet temperature, temperature difference between the inlet and outlet and heat transfer power were taken as indicators to evaluate the effect of the three heat exchangers. The results showed that the minimum mud outlet temperature of spiral baffle heat exchanger could be ?2.1 ℃, and the inlet and outlet temperature difference reached 4.1 ℃, which showed a satisfied heat transfer result. Finally, the key process parameters of heat exchanger and the selection of key equipment of mud refrigeration system were proposed..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 101 (2024)
Exploration and Application of the Comparison Teaching Method in the Experiment Teaching of Fourier Transform Infrared Spectrum Analysis
Ting KUANG, Haijian LUO, Linlin SONG, and Dingning KE
By seamlessly integrating the distinctive characteristics of experiments with teaching objectives, the comparative teaching method was innovatively employed in the experimental class, thoroughly examining its application and practice within infrared spectroscopy analysis experimental teaching. Through the implementatioBy seamlessly integrating the distinctive characteristics of experiments with teaching objectives, the comparative teaching method was innovatively employed in the experimental class, thoroughly examining its application and practice within infrared spectroscopy analysis experimental teaching. Through the implementation of this teaching method, students not only gain a profound understanding of the similarities and differences between transmission method and attenuated total reflection infrared spectroscopy analysis method, but also master the practical application skills of these two methods. Practice has demonstrated that the comparative learning method not only effectively drives the reform and quality enhancement of polymer material analysis experiments, but also serves to strengthen student’s practical operation ability, stimulate their research passions, and establish a robust foundation for nurturing future research talents..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 108 (2024)
Design and Implementation of the Double Vacuum Forming Device for Composite Materials
Pengcheng LU, and Zhiping WANG
In the process of developing talent, professional experimental practice teaching is a crucial tool for the thorough application of knowledge and the development of creative ability. Through independent design and development of experimental instruments and equipment, it is important to raise the standard of the scientiIn the process of developing talent, professional experimental practice teaching is a crucial tool for the thorough application of knowledge and the development of creative ability. Through independent design and development of experimental instruments and equipment, it is important to raise the standard of the scientific research and experimental practice teaching. This paper designs and implements a double vacuum debulking (DVD) equipment for the production and maintenance of aviation composite structures in accordance with professional characteristics. The equipment consists of a double vacuum mechanical structure, a temperature control system, a vacuum system, and a monitoring system. It can be used to form composite material structures and repair structures that adhere to aviation manufacturing standards. It can also be used to carry out the primary experimental practice projects related to composite material science and engineering. This equipment is inexpensive, safe, and easy to operate, thus problems such as excessive costs, specialized machinery, and large, costly industrial equipment that impede scientific instruction and research are resolved. With the use of this equipment, students can fully express their subjective initiative and develop their practical abilities, giving them more flexibility in applying the knowledge they have gained through experimentation..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 113 (2024)
Research on the Semiconductor-Based Photovoltaic Cooling Device
Xiaonan YUAN, Yuxiao LIU, Hanqi HUANG, Wenyu LIU, and Yongqiang LI
With the development of new energy, photovoltaic power generation has been continuously promoted and applied. However, the current photovoltaic power generation system still has the problem of low power generation efficiency caused by insufficient cooling. The paper comprehensively compares various heat dissipation andWith the development of new energy, photovoltaic power generation has been continuously promoted and applied. However, the current photovoltaic power generation system still has the problem of low power generation efficiency caused by insufficient cooling. The paper comprehensively compares various heat dissipation and cooling methods for photovoltaic power generation systems, and designs a cooling device for photovoltaic power generation systems based on the semiconductor heat dissipation principle. A heat dissipation and cooling module is made based on Peltier components, and pulse width modulation (PWM) signals are combined with the metal-oxide-semiconductor field-effect transistor (MOSFET) to achieve the power control of the heat dissipation and cooling module. An incremental proportional-integral-differential (PID) algorithm is designed to achieve feedback regulation of the system. The human-computer interaction interface is designed based on MATLAB to realize the intelligent control of the system. Through simulation testing and physical testing, it is found that when the cooling temperature is set at 18 ℃, the device can keep the fluctuation range of the surface temperature of the photovoltaic panel within 1 ℃, which is of great significance to the improvement of the power generation efficiency of the photovoltaic power generation system..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 120 (2024)
Construction of the Closed-loop Management Path for Laboratory Safety in the Biology Experimental Teaching Center
Xixia LIU, Jing CHE, Bin FENG, Wen HONG... and Jianjun HOU|Show fewer author(s)
The experimental center laboratory of biology carries a large number of experimental teaching activities. It has some characteristics, including large number of participants, large mobility, weak safety awareness, open sharing, and various types of courses, which is also easy to cause laboratory safety accidents. In orThe experimental center laboratory of biology carries a large number of experimental teaching activities. It has some characteristics, including large number of participants, large mobility, weak safety awareness, open sharing, and various types of courses, which is also easy to cause laboratory safety accidents. In order to ensure the safe and efficient operation of the experimental center laboratory of biology in the the whole year, an implementation path for the closed-loop management of the experimental center laboratory safety of biology is proposed, including hazard management, laboratory safety check, laboratory staffs, laboratory safety education, laboratory bio-safety, hazardous chemicals safety, laboratory waste safety and measures for handling laboratory safety accidents. The path provides guidance for the safe management of the experimental center of biology..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 126 (2024)
Modern Technology Empowering the Construction of Safety Management for Large-scale Instrument Laboratory
Rui CHEN
Large-scale instrument is featured as expensive and sophisticated, and a highly careful operation and high maintenance cost are required. Furthermore, high openness of the large-scale instruments and strong mobility of persons delivering sample make the safety management for large-scale instrument laboratory much more Large-scale instrument is featured as expensive and sophisticated, and a highly careful operation and high maintenance cost are required. Furthermore, high openness of the large-scale instruments and strong mobility of persons delivering sample make the safety management for large-scale instrument laboratory much more complicated. In order to ensure the security of laboratory with above mentioned characteristics, a series of steps has been taken by School of Materials Science and Engineering, Nankai University in recent years. They did a great progress on standardizing the traditional management modes, moreover, a lot of new appearing technology and scientific programs have been innovatively, gradually explored and performed. After a couple of years’ practice and implementation, a general large-scale instrument room safety management scheme has been established, that is, “collaboration of different regions, combination of virtual and real, remote assistance, joint prevention and control”. Based on the above management practices, the platform has been operating efficiently and openly for several years, providing strong support for the cultivation of high-quality talents, high-level scientific research, and the construction of “Double first-class” disciplines..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 132 (2024)
Research on Building a Laboratory Safety System Based on CMA Certification
Zhen WANG, Zuzhao XIONG, and Weili DAO
As a laboratory platform for public scientific research and teaching services, the analytical and testing center has the characteristics of large personnel flow, large amount of testing and high security risk. The security management of center is crucial to the stability of school and society. Based on the standards anAs a laboratory platform for public scientific research and teaching services, the analytical and testing center has the characteristics of large personnel flow, large amount of testing and high security risk. The security management of center is crucial to the stability of school and society. Based on the standards and requirements in CMA (China Mandatory Approval) certification, and relying on the sharing platform of large instruments and equipment in universities, a series of work has been carried out around laboratory safety management mechanism, laboratory standardization work, safety education and access system. In this way, the safety management system of the analytical and testing center is optimized, and the stable and efficient operation of the laboratory is ensured, which provide references for construction of laboratory safety..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 137 (2024)
Exploration and Reflection on the Assessment and Evaluation System of the Large-scale Instrument Public Technology Platform in Universities
Qi TENG, Shuyun LIU, Wenjun WANG, Liyuan JIAO... and Guokai LYU|Show fewer author(s)
Large-scale scientific instruments are important resources for cutting-edge research, high-level talent training and social services, so it is important to improve the efficiency of large-scale scientific instruments. Based on the practice of the large-scale instrument public technology platform of Shandong University,Large-scale scientific instruments are important resources for cutting-edge research, high-level talent training and social services, so it is important to improve the efficiency of large-scale scientific instruments. Based on the practice of the large-scale instrument public technology platform of Shandong University, this paper summarizes the current problems in performance management, and hopes to realize the initial construction of the assessment and evaluation system and promote the construction of the large-scale instrument public technology platform through the exploration and thinking of the platform assessment and evaluation system, thereby furtherly improving the efficiency of large-scale scientific instrument resources..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 142 (2024)
Graph Analysis of Domestic Laboratory Safety Research Based on CiteSpace
Jianfang WANG, Hongyan YU, Lei HUANG, and Yangyang LI
Infrastructure (CNKI) database from 1995 to 2022 are visualized and analyzed using CiteSpace 6.2.2 software. The results indicate that in the past 28 years, research in the field of laboratory safety has gone through a period of gestation, germination, slow growth, and rapid growth. The number of publications and literInfrastructure (CNKI) database from 1995 to 2022 are visualized and analyzed using CiteSpace 6.2.2 software. The results indicate that in the past 28 years, research in the field of laboratory safety has gone through a period of gestation, germination, slow growth, and rapid growth. The number of publications and literature accumulation are almost consistent with the construction and development process of domestic laboratories. The cooperation between authors and institutions is not very close, and the research force is relatively weak. The majority of researchers and institutions are “211” and “985” universities, and most of them are administrative staff involved in laboratory and equipment management; The research hotspots in different periods are different, showing obvious divergences and hierarchical progression, and mainly related to safety events with social impact..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 148 (2024)
Research on Construction and Management of the Smart Construction Practical Training Laboratory
Qinchuan TU, and Pei FU
The smart construction technology plays an important role in the modern civil engineering project management, which will be one of the important directions for the future technological upgrading of civil engineering. In the process of teaching undergraduate majoring in civil engineering, experiments and practical trainThe smart construction technology plays an important role in the modern civil engineering project management, which will be one of the important directions for the future technological upgrading of civil engineering. In the process of teaching undergraduate majoring in civil engineering, experiments and practical training are very important teaching links. Take the smart construction training laboratory of Hubei University of Technology as an example, integrating undergraduate experiment teaching with practical training, scientific management and rational configuration through the modern cloud platform system can not only realize the basic functions of undergraduate experimental teaching, but also cultivate the practical application and innovation ability of undergraduates through practical training. Through the model of synergistic development of experimental teaching and practical training competition, the optimization of civil engineering experiments teaching system is explored, the compatibility of university laboratories and promoting synergistic development is improved, and the diversification and comprehensive of laboratory functions are realized..
Experiment Science and Technology
- Publication Date: Aug. 28, 2024
- Vol. 22, Issue 4, 156 (2024)
