检索结果-南通市图书馆

Study on impedance spectroscopy based on dynamic equivalent circuit of solar cell

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2024年第8期20卷 449-453页

作者： xiao wenbo LI Ao WU Huaming LI Yongbo xiao Bangzhi Key Laboratory of Nondestructive Testing Ministry of EducationNanchang Hangkong UniversityNanchang 330063China Jiangxi Engineering Laboratory for Optoelectronics Testing Technology Nanchang 330063China College of Science and Technology Nanchang Hangkong UniversityGongqingcheng 332020China School of Engineering and Construction Nanchang UniversityNanchang 330031China

This paper investigates the impedance spectroscopy of monocrystalline silicon solar cells(MSSC)and dye-sensitized solar cells(DSSC)using solar cell dynamic equivalent resistor-capacitance(RC)and capacitor sum capacitor(CSC)***,these circuits effectively represent the dynamic behavior of MSSC and ***,the measurement method significantly impacts the accuracy of impedance measurements in the high-frequency ***,the series resistance affects the distance between the left end of the impedance spectroscopy and the origin,while the parallel resistance influences the size of the impedance *** the CSC circuit,the relative magnitudes of dielectric relaxation capacitance and chemical capacitance affect the number and position of arc in the impedance *** value of the dielectric relaxation capacitor determines the number of impedance spectroscopy *** conclusions provide guidelines for improving the accuracy of solar cell impedance measurements.

关键词： spectroscopy impedance capacitance

Construction of a broadband impedance spectrum and synchronous DC voltammetry measurement system for solar cells

在线全文

学校读者我要写书评

暂无评论

Journal of Measurement Science and Instrumentation 2024年第3期15卷 302-307页

作者： xiao wenbo LI Ao WU Huaming LI Yongbo College of Science and Technology Nanchang Hangkong UniversityJiujiang 332020China Key Laboratory for Optoelectronic Information Perception and Instrumentation of Jiangxi Province Nanchang Hangkong UniversityNanchang 330063China Key Laboratory of Nondestructive Testing of Ministry of Education Nanchang Hangkong UniversityNanchang 330063China

The current impedance spectroscopy measurement techniques face difficulties in diagnosing solar cell faults due to issues such as cost,complexity,and ***,a novel system was developed for precise broadband impedance spectrum measurement of solar cells,which was composed of an oscilloscope,a signal generator,and a sampling *** results demonstrate concurrent accurate measurement of the impedance spectrum(50 Hz-0.1 MHz)and direct current voltametric *** analysis with Keithley 2450 data yields a global relative error of approximately 6.70%,affirming the *** excitation signals(sine,square,triangle,pulse waves),sine wave input yields the most accurate data,with a root mean square error of approximately 13.3016 and a global relative error of approximately 4.25%compared to theoretical *** reference resistance expands the half circle in the impedance *** of reference resistance to that of the solar cell enhances the accuracy by mitigating line resistance *** error is lower in high-frequency regions due to a higher signal-to-noise ratio.

关键词： solar cell oscilloscope signal generator volt-ampere characteristics impedance spectrum

基于混沌自适应权重改进蛇优化算法的光伏电池参数提取

在线全文

学校读者我要写书评

暂无评论

激光与光电子学进展 2024年第15期61卷 323-331页

作者：朱洪林肖文波周恒李欣蕊南昌航空大学科技学院江西共青城332020 江西省光电检测技术工程实验室江西南昌330063

针对光伏电池单二极管参数的提取中,蛇优化算法收敛速度慢、收敛精度低、易于陷入局部最优的问题,提出一种混沌自适应权重改进蛇优化算法。混沌的初始化以及自适应权重的设置可动态地改善算法在寻找食物、战斗、交配中的比例。通过对比... 详细信息

针对光伏电池单二极管参数的提取中,蛇优化算法收敛速度慢、收敛精度低、易于陷入局部最优的问题,提出一种混沌自适应权重改进蛇优化算法。混沌的初始化以及自适应权重的设置可动态地改善算法在寻找食物、战斗、交配中的比例。通过对比不同光强和温度下理论与实验伏安数据,验证了改进算法的有效性。结果表明,相比于蛇优化算法,改进算法在收敛速度方面提高约219.7%,精度提高约58.40%,稳定性提高约49.57%。且发现光强对光生电流的影响比温度大,温度对反向饱和电流、串联电阻、并联电阻、理想因子的影响比光强大。

关键词：光伏电池单二极管模型蛇优化算法混沌自适应权重参数提取

在线全文

学校读者我要写书评

暂无评论

光伏电池及阵列的老化故障研究

实验室研究与探索 2024年第2期43卷 60-64,131页

作者：肖文波章文龙李欣蕊南昌航空大学科技学院江西共青城332020 江西省光电检测技术工程实验室南昌330063

为研究光伏电池及阵列老化故障原因,建立故障辨识模型。单晶硅(砷化镓)电池老化前后理论拟合与实验数据全局均方根误差均小于0.11 mA (0.59 mA),表明了模型的可靠性。以此为依据,研究了二极管理想因子n、串联电阻R_(s)和并联电阻R_(sh)... 详细信息

为研究光伏电池及阵列老化故障原因,建立故障辨识模型。单晶硅(砷化镓)电池老化前后理论拟合与实验数据全局均方根误差均小于0.11 mA (0.59 mA),表明了模型的可靠性。以此为依据,研究了二极管理想因子n、串联电阻R_(s)和并联电阻R_(sh)对单晶硅(砷化镓)电池最大输出功率P_(max)影响,发现两种电池P_(max)随n和R_(s)增加而下降,随着R_(sh)增加而增加;n对两电池影响很小且基本一致;R_(s)和R_(sh)对硅电池影响大,原因在于砷化镓电池抗老化能力强。研究了4×4 BL、HC、TCT、NS硅阵列P_(max)与其中单电池n、R_(s)、R_(sh)的关系,发现P_(max)与n、R_(s)、R_(sh)的变化趋势与上述一致;R_(s)影响下阵列P_(max)的降序为BL>HC>TCT=NS。研究结果对于光伏电池及阵列的老化故障判断提供了理论指导。

关键词：光伏电池光伏阵列模型老化故障性能分析

基于数据采集卡及电子负载的太阳能电池伏安特性测试系统

在线全文

学校读者我要写书评

暂无评论

中国测试 2024年第2期50卷 79-84页

作者：雷剑鹏肖邦治肖文波吴华明刘伟庆陈文浩南昌航空大学无损检测技术教育部重点实验室江西南昌330063 南昌航空大学江西省光电检测技术工程实验室江西南昌330063 南昌大学工程建设学院江西南昌330031

为低成本高速测量太阳能电池伏安特性,设计一套基于数据采集卡(DAQ)及金属-氧化物半导体场效应晶体管电子负载(MOS)的测量系统。该系统硬件主要包括DAQ、MOS以及采样电阻等,软件主要包括数据采集模块、数据分析处理模块、数据存储模块... 详细信息

为低成本高速测量太阳能电池伏安特性,设计一套基于数据采集卡(DAQ)及金属-氧化物半导体场效应晶体管电子负载(MOS)的测量系统。该系统硬件主要包括DAQ、MOS以及采样电阻等,软件主要包括数据采集模块、数据分析处理模块、数据存储模块等。对测量系统研究有三点结论。第1点是系统测量结果与Keithley 2400源表对比,它们之间全局相对误差约为9.5%;与电阻箱负载测量结果对比,它们之间最大功率点相差约17%;说明系统测量精度较高。第2点是发现MOS管电子负载无法实现零阻值负载,但可在电池最大功率点附近做到几乎连续电阻变化;管子型号影响测量结果,且开态电阻大的MOS管测量误差大。采样电阻应选择小的但不能无穷小,因为当使用小的采样电阻时导线电阻将对测量结果严重影响。第3点是采用Matlab/Simulink建模和拟合实验数据时,可获得电池短路电流、反向饱和电流及二极管理想因子,弥补系统固有缺点。

关键词：数据采集卡 MOS管太阳能电池 I-V曲线

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

太阳能电池阻抗谱测量方法及其应用进展

中国测试 2024年第1期50卷 1-8页

作者：李傲肖文波张濬哲吴华明王树鹏南昌航空大学无损检测技术教育部重点实验室江西南昌330063 南昌航空大学材料科学与工程学院江西南昌330063 中国航发沈阳黎明航空发动机有限责任公司辽宁沈阳110043

阻抗谱测量技术是研究太阳能电池的重要手段。该文首先对近几年提出的阻抗谱测量方法进行评述,分析各类方法的优缺点。通过对阻抗谱测量方法的研究,发现不同测量方法之间的差异主要体现在其效率、精度以及成本等方面。其次,分析阻抗谱... 详细信息

阻抗谱测量技术是研究太阳能电池的重要手段。该文首先对近几年提出的阻抗谱测量方法进行评述,分析各类方法的优缺点。通过对阻抗谱测量方法的研究,发现不同测量方法之间的差异主要体现在其效率、精度以及成本等方面。其次,分析阻抗谱在太阳电池故障检测、电子输运、界面研究等方面的应用情况,指出它们评价电池动态行为时存在的不足之处。最后,总结阻抗谱测量方法未来发展方向及应用需求。

关键词：太阳能电池阻抗谱故障评估电子输运界面研究

Structural, mechanical, electronic properties, and Debye temperature of quaternary carbide Ti3NiAl2C ceramics under high pressure: A first-principles study

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第3期30卷 416-422页

作者： Diyou Jiang wenbo xiao Sanqiu Liu Key Laboratory of Nondestructive Testing Ministry of EducationNanchang Hangkong UniversityNanchang 330063China Fujian Science&Technology Innovation Laboratory for Energy Devices of China(21C-LAB) Ningde 352100China Department of Physics Nanchang UniversityNanchang 330047China

Quaternary carbide Ti3NiAl2C ceramics has been investigated as a potential nuclear fusion structural material,and it has advantages in certain aspects compared with Ti2AlC,Ti3AlC2,and Ti3SiC2 structural *** this paper,quaternary carbide Ti3NiAl2C ceramics is pressurized to investigate its structural,mechanical,electronic properties,and Debye *** carbide Ti3NiAl2C ceramics still maintains a cubic structure under pressure(0–110 GPa).At zero pressure,quaternary carbide Ti3NiAl2C ceramics only has three bonds:Ti–Al,Ni–Al,and Ti–***,at pressures of 20 GPa,30 GPa,40 GPa,60 GPa,and 70 GPa,new Ti–Ni,Ti–Ti,Al–Al,Ti–Al,and Ti–Ti bonds *** the pressure reaches 20 GPa,the covalent bonds change to metallic *** volume of quaternary carbide Ti3NiAl2C ceramics can be compressed to 72%of its original volume at *** can improve the mechanical strength and ductility of quaternary carbide Ti3NiAl2C *** 50–60 GPa,its mechanical strength can be comparable to pure tungsten,and the material changes from brittleness to ***,the degree of anisotropy of quaternary carbide Ti3NiAl2C ceramics increases with the increasing *** addition,we also investigated the Debye temperature,density,melting point,hardness,and wear resistance of quaternary carbide Ti3NiAl2C ceramics under pressure.

关键词： quaternary carbide Ti3NiAl2C ceramics structural properties mechanical properties electronic properties Debye temperature first-principles

Synthesis of Hydroxyapatite Nanorods under Mild Conditions and Their Drug Release Properties

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2015年第9期33卷 1024-1030页

作者： Deyan Kong Xinli xiao Xueying Qiu wenbo Zhang Yulin Yang Department of Chemistry School of Science Harbin Institute of Technology Harbin Heilongjiang 150001 China

Hydroxyapatite （HAp） nanorods possess vast potential applications in various fields, and here HAp nanorods with high aspect ratio were synthesized via a convenient two-stage precipitation-hydrolysis process at 60℃ under atmospheric pressure. The precursor of CaHPO4 at precipitation stage is well crystallized as nubby morphology with CTAB as surfactant, while CaHPO4 was dissolved and CTA＋ stabilized the HAp nuclei during the hydrolysis stage. OH- ions were absorbed onto the active crystal surface, where Ca2＋ and PO4 3- reacted with OH- to make the nuclei grow into larger crystals, and highly crystalline HAp nanorods were obtained by Ostwald ripening. The loaded drug of IBU on the HAp crystals can be 100% released in 24 h. PVP modified HAp nanorods can increase the drug-loading capacity and release drug faster than pure HAp nanorods. The results indicate that HAp nanorods modified with suitable surfactants are of great use in drug delivery system.

关键词： synthesis design nanoparticles drug delivery crystal growth

Computed tomography-based delta radiomics of tumor core_edge combination for systemic treatment response evaluation in pancreatic cancer

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Pancreatology 2024年第3期7卷 181-190页

作者： Xiang Li Na Lu Peijun Hu Yiwen Chen Liying Liu Xinyuan Liu Chengxiang Guo wenbo xiao Ke Sun Jingsong Li Xueli Bai Tingbo Liang Department of Hepatobiliary and Pancreatic Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhouChina Zhejiang Provincial Key Laboratory of Pancreatic Disease HangzhouChina Research Center for Healthcare Data Science Zhejiang LabHangzhou China Department of Radiology The First Affiliated HospitalZhejiang University School of MedicineHangzhouChina Department of Pathology The First Affiliated HospitalZhejiang University School of MedicineHangzhouChina Key Laboratory for Biomedical Engineering of Ministry of Education College of Biomedical Engineering and Instrument ScienceZhejiang UniversityHangzhouChina Zhejiang University Cancer Center HangzhouChina

Background:As a systemic disease,pancreatic cancer(PC)can be treated systemically to raise the R0 resection rate and enhance patient *** best ways to assess the treatment response to systemic treatment of patients with PC are still ***:A total of 122 PC patients were enrolled;25 of these patients were used as an independent testing *** to the pathologic response,PC patients were classified into the responder and nonresponder *** whole tumor,core,edge,and peritumoral were segmented from the enhanced computed tomography(CT)***-learning models were created by extracting the variations in radionics features before and after therapy(delta radiomics features).Finally,we compared the performance of models based on radiomics features,changes in tumor markers,and radiologic ***:The model based on the core(area under curve[AUC]=0.864)and edge features(AUC=0.853)showed better performance than that based on the whole tumor(AUC=0.847)or peritumoral area(AUC=0.846).Moreover,the tumor core_edge combination model(AUC=0.899)could better increase confidence in treatment response than using either of them *** accuracies of models based on changes in tumor markers and radiologic evaluation were relatively poorer than of the radiomics ***,Patients predicted to respond to therapy using the radiomics model showed a relatively longer overall survival(43 vs 27 months),although there were no significant differences(P=.063).Conclusions:The tumor core_edge combination delta radiomics model is an effective approach to evaluate pathologic response in PC patients with systemic treatment.

关键词： Computed tomography Delta radiomics Pancreatic cancer Pathologic response Systemic treatment