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Reliability evaluation of IGBT power module on electric vehicle using big data

Journal of Semiconductors 2024年第5期45卷 50-60页

作者： Li Liu Lei Tang Huaping Jiang Fanyi Wei Zonghua Li changhong Du Qianlei peng Guocheng Lu The School of Electrical Engineering Chongqing UniversityChongqing 400044China The Deepal Automobile Technology Co. Ltd.Chongqing 400023China

There are challenges to the reliability evaluation for insulated gate bipolar transistors(IGBT)on electric vehicles,such as junction temperature measurement,computational and storage resources.In this paper,a junction temperature estimation approach based on neural network without additional cost is proposed and the lifetime calculation for IGBT using electric vehicle big data is performed.The direct current(DC)voltage,operation current,switching frequency,negative thermal coefficient thermistor(NTC)temperature and IGBT lifetime are inputs.And the junction temperature(T_(j))is output.With the rain flow counting method,the classified irregular temperatures are brought into the life model for the failure cycles.The fatigue accumulation method is then used to calculate the IGBT lifetime.To solve the limited computational and storage resources of electric vehicle controllers,the operation of IGBT lifetime calculation is running on a big data platform.The lifetime is then transmitted wirelessly to electric vehicles as input for neural network.Thus the junction temperature of IGBT under long-term operating conditions can be accurately estimated.A test platform of the motor controller combined with the vehicle big data server is built for the IGBT accelerated aging test.Subsequently,the IGBT lifetime predictions are derived from the junction temperature estimation by the neural network method and the thermal network method.The experiment shows that the lifetime prediction based on a neural network with big data demonstrates a higher accuracy than that of the thermal network,which improves the reliability evaluation of system.

关键词： IGBT junction temperature neural network electric vehicles big data

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Separation of As and Bi and enrichment of As,Cu,and Zn from copper dust using an oxidation-leaching approach

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Chinese Journal of Chemical Engineering 2021年第5期34卷 125-131页

作者： Erjun Zhang Kanggen Zhou Wei Chen Xuekai Zhang changhong peng School of Metallurgy and Environment Central South UniversityChangsha 410083China College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

Copper dust with high arsenic content is a hazardous waste that should be treated properly.Herein,the copper dust is oxidized,leached,and separated at room temperature and atmospheric pressure.To separate As and Bi,part of As(Ⅲ)in copper dust is oxidized to As(V),so that most of the As,Cu,and Zn elements enter the solution and the Bi remains in the leaching residue.Also,the influence of several factors,such as H_(2)SO_(4) dosage,H_(2)O_(2) dosage,liquid-solid ratio,leaching temperature and leaching time,on the leaching percentage of As,Bi,Cu,and Zn is systematically investigated.The optimal conditions are obtained as follows:liquid-solid ratio of 3:1,H_(2)O_(2) dosage of 10 ml/50 g(dust),H_(2)SO_(4) dosage of 4.5 ml/50 g(dust),leaching temperature of 85 C,and leaching time of 3 h.Under these conditions,the leaching percentage of As,Cu,Zn,and Bi is found to be 97.39%,96.11%,97.32%,and 2.40%,respectively.For further recovery of As from the leaching solution,the one-step recycle leaching of the leaching solution is performed to increase the concentration of As in the recycled leaching solution.The concentration of arsenic in the recycling leaching solution is found to be 79.63 g·L^(-1),which is beneficial for the study on further recovery of As_(2)O_(3).

关键词： Copper dust High arsenic content As Bi Selective leaching Enrichment

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Separation and recovery of scandium and titanium from red mud leaching liquor through a neutralization precipitation-acid leaching approach

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Journal of Rare Earths 2021年第9期39卷 1126-1132页

作者： Qingyuan Lei Dewen He Kanggen Zhou Xuekai Zhang changhong peng Wei Chen School of Metallurgy and Environment.Central South University Changsha 410083China

Selective recovery of scandium and titanium from red mud leaching solution was achieved through neutralization precipitation followed by acid leaching approach.In the neutralization precipitation section,the effects of pH,temperature and reaction time on metal precipitation efficiency were investigated.Under the optimal co ndition,the precipitation efficiencies of scandium and titanium were 93.74%and 99.47%,respectively.In the acid leaching section,the effects of acidity,temperature,reaction time,and raffinate to acid solution ratio on leaching efficiency were investigated.Under the optimal condition,the leaching efficiencies of scandium and titanium were 99.97%and 5.44%,respectively.The loss of scandium and titanium were 6.3%and 5.9%,respectively.Compared with the traditional extraction procedure of scandium in red mud,this method could separate titanium from scandium effectively,which is beneficial for the purification of the products and improvement of value of the metal.

关键词： Red mud Scandium Titanium Neutralization precipitation Acid leaching Rare earths

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Separation and recovery of iron and scandium from acid leaching solution of red mud using D201 resin

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Journal of Rare Earths 2020年第12期38卷 1322-1329页

作者： Xuekai Zhang Kanggen Zhou Yehuizi Wu Qingyuan Lei changhong peng Wei Chen School of Metallurgy and Environment Central South UniversityChangsha 410083China

Red mud is a byproduct of alumina refining of bauxite ores,and is a significant source for extracting scandium.However,a large amount of iron in red mud makes it difficult to recover scandium because Fe(III) and Sc(Ⅲ) have similar physicochemical properties.In this study,a new method was developed for selective separation of iron and scandium in acid leachate of red mud using D201 resin.Theoretical calculations indicate that the ferric species mainly exists as FeCl3 or FeCl4-at chloride concentration above 6.65 mol/L,while scandium still exists as SCl2+,making it possible to selectively separate iron fro m scandium through anion resin adso rption.The factors affecting the adso rption of iron and scandium such as chloride conce ntratio n,resin dosage,adso rption time,and temperature were evaluated in batch experiments,The Langmuir model was successfully applied to both iron and scandium adsorption,and the maximum adsorption capacities of iron and scandium are 147.06 and 0.95 mg/g,respectively,indicating a significant difference between iron and scandium.Raman analysis further demonstrates that the iron is adsorbed onto D201 resin as FeCl4 anion.

关键词： Red mud Resource recovery Iron Scandium Ion exchange Rare earths

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Progress on design and related R&D activities for the water-cooled breeder blanket for CFETR

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Theoretical & Applied Mechanics Letters 2019年第3期9卷 161-172页

作者： Songlin Liu Xiaoman Cheng Xuebin Ma Lei Chen Kecheng Jiang Xia Li Hui Bao Jichao Wang Wanjing Wang changhong peng peng Lu Min Li Kai Huang Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China Advanced Energy Research Center Shenzhen University Shenzhen 518060 China University of Science and Technology of China Hefei 230026

The water-cooled ceramic breeder (WCCB) blanket is one of the blanket candidates for Chinese fusion engineering testing reactor (CFETR) and is being developed at the Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP). This paper reviews design and evolution of the WCCB blanket for CFETR, and presents a new WCCB blanket design according to the latest CFETR core parameters (major and minor radii are R = 7.2 m and a = 2.2 m, respectively) and missions. This new design is expected to satisfy multiple CFETR operation modes of 0.2, 0.5, 1.0, and 1.5 GW fusion power and achieve tritium self-sufficiency. The feasibility of the updated blanket design is evaluated from the aspects of neutronics and thermo-hydraulics. Furthermore, the research and development (R&D) activities supporting to the WCCB blanket for CFETR are reported, including the design code, the water loop experiments, the pebble bed modeling and experiments, and the components fabrication technology.

关键词： Chinese fusion engineering testing reactor WCCB blanket Research and development

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基于靶标诱导滚环扩增的无标记适配体生物传感器快速检测赭曲霉毒素A

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食品研究与开发 2024年第3期45卷 174-180页

作者：方鹏王帅毛瑜刘长虹合肥工业大学食品与生物工程学院安徽合肥230009

该文构建一种基于靶标诱导滚环扩增(rolling circle amplification,RCA)的无标记适配体快速检测赭曲霉毒素A(ochratoxin A,OTA)生物传感器。该生物传感器探针由RCA引物与OTA适配体两部分组成,在OTA存在的环境中,OTA适配体特异性识别靶标... 详细信息

该文构建一种基于靶标诱导滚环扩增(rolling circle amplification,RCA)的无标记适配体快速检测赭曲霉毒素A(ochratoxin A,OTA)生物传感器。该生物传感器探针由RCA引物与OTA适配体两部分组成,在OTA存在的环境中,OTA适配体特异性识别靶标,探针结构被打开,RCA引物与环状DNA模板(circular DNA template,CT)结合开启RCA反应,加入核酸染料SYBR Gold产生荧光信号。此生物传感器具有较高的特异性,检测限为6.6×10^(-2)nmol/L,线性检测范围为6.6×10^(-2)~660 nmol/L,可用于具体的分析检测。此生物传感器无需复杂化学修饰且操作简单,在食品安全检测中具有良好的应用前景。

关键词：赭曲霉毒素A 核酸适配体检测无标记滚环扩增

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不同激素处理和扦插时间对幼化乌桕嫩枝扦插生根的影响

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中南林业科技大学学报 2024年第3期44卷 44-55,99页

作者：王涛黄涛孙李勇彭大庆朱长红陈小溪李淑娴南京林业大学林木遗传育种全国重点实验室江苏南京210037 南京林业大学南方现代林业协同创新中心江苏南京210037 南京林业大学林木遗传与生物技术教育部重点实验室南京林业大学江苏省林木遗传和高效培育重点实验室江苏南京210037 盐城林场江苏盐城224136 襄阳市林业科学技术推广站湖北襄阳441022

【目的】优化乌桕扦插育苗试验,为乌桕的无性繁殖提供实践参考;观察生根过程的形态、解剖学结构及营养物质变化,为乌桕生根机理提供理论依据。【方法】以6年生乌桕为材料,分析幼化处理后在外源激素(200、500、800 mg·L^(-1)的NAA和800... 详细信息

【目的】优化乌桕扦插育苗试验,为乌桕的无性繁殖提供实践参考;观察生根过程的形态、解剖学结构及营养物质变化,为乌桕生根机理提供理论依据。【方法】以6年生乌桕为材料,分析幼化处理后在外源激素(200、500、800 mg·L^(-1)的NAA和800、1000、1200 mg·L^(-1)的IBA)和扦插时期(6、9月)对乌桕嫩枝扦插生根的影响;定期拍照进行形态观察以确定采样周期,利用石蜡切片技术观察插穗的解剖学结构,并采用蒽酮比色法和考马斯亮蓝法测定可溶性糖、淀粉和可溶性蛋白含量。【结果】幼化处理可以明显提高乌桕扦插生根效果;IBA处理组的生根效果明显优于NAA,当IBA浓度为1200 mg·L^(-1)时生根率最高,可达100%。6月乌桕扦插的各生根指标均高于9月。解剖学观察未发现潜伏根原基,因此乌桕嫩枝扦插不定根源于诱生根原基,存在皮部及愈伤两种生根类型;在乌桕扦插生根过程中,处理组淀粉含量变化呈“下降—上升”趋势,可溶性糖、可溶性蛋白含量呈“上升—下降—上升”的变化趋势,对照组变化趋势与激素处理组相似,但峰值出现时间比处理组推迟7 d左右。【结论】乌桕不定根发生属于混合生根类型,幼化处理可有效提高乌桕扦插生根效果,6月扦插,1200 mg·L^(-1)的IBA激素处理生根效果最好,且生长调节剂能提高营养物质积累与代谢速度,促进插穗生根。

关键词：乌桕嫩枝扦插解剖结构生长调节剂营养物质

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Establishment of organoid models for pancreatic ductal adenocarcinoma and screening of individualized therapy strategy

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动物模型与实验医学(英文) 2023年第5期6卷 409-418页

作者： Miaomiao Gong Han Meng Dengxu Tan peng Li Jing Qin Qingling An changhong Shi Jiaze An Division of Cancer Biology Laboratory Animal CenterFourth Military Medical UniversityXi'anChina School of Basic Medical Sciences Medical College of Yan'an UniversityYananChina Animal Experiment Center Guangzhou University of Chinese MedicineGuangzhouChina Department of Hepatobiliary and Pancreaticosplenic Surgery Xijing HospitalFourth Military Medical UniversityXi'anChina

Background:Patients with pancreatic ductal adenocarcinoma(PDAC)who undergo surgical resection and receive effective chemotherapy have the best chance for longterm survival.Unfortunately,because of the heterogeneity of pancreatic cancer,it is difficult to find a personalized treatment strategy for patients.Organoids are ideal preclinical models for personalized medicine.Therefore,we explore the cultivation conditions and construction methods of PDAC organoid models to screen the individualized therapy strategy.Methods:Fresh PDAC tissues from surgical resection were collected and digested with digestive enzymes;then the tumor cells were embedded in Matrigel with a suitable medium to establish the PDAC organoid models.The genetic stability of the organoids was analyzed using whole exon sequencing;hematoxylin and eosin staining and immunohistochemistry of organoids were performed to analyze their consistency with the pathological morphology of the patient's tumor tissue;After 2 days of organoid culture,we selected four commonly used clinical chemotherapy drugs for single or combined treatment to analyze drug sensitivity.Results:Two cases of PDAC organoid models were successfully established,and the results of their pathological characteristics and exome sequencing were consistent with those of the patient's tumor tissue.Both PDAC organoids showed more sensitivity to gemcitabine and cisplatin,and the combined treatment was more effective than monotherapy.Conclusion:Both organoids better retained the pathological characteristics,genomic stability,and heterogeneity with the original tumor.Individual PDAC organoids exhibited different sensitivities to the same drugs.Thus,this study provided ideal experimental models for screening individualized therapy strategy for patients with PDAC.

关键词： 3D culture individualized therapy organoid pancreatic ductal adenocarcinoma

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胰腺癌类器官模型的构建与应用

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中国比较医学杂志 2024年第6期34卷 40-46页

作者：李鹏黄敏丽谭邓旭张彩勤张永斌师长宏广州中医药大学动物实验中心广州510405 第四军医大学实验动物中心西安710032

目的构建胰腺癌类器官(patient-derived tumor organoid, PDO)并进行药物治疗评价,评估PDO模型的有效性。方法收集胰腺癌患者新鲜手术标本,用于PDO培养;分析PDO模型与原发瘤的病理学和遗传学特征;利用PDO模型开展临床化疗药物的疗效评... 详细信息

目的构建胰腺癌类器官(patient-derived tumor organoid, PDO)并进行药物治疗评价,评估PDO模型的有效性。方法收集胰腺癌患者新鲜手术标本,用于PDO培养;分析PDO模型与原发瘤的病理学和遗传学特征;利用PDO模型开展临床化疗药物的疗效评价,测试模型的有效性。结果成功建立一例胰腺癌PDO模型,组织形态学分析显示PDO模型基本保持了原发肿瘤病理学特征。全外显子测序结果显示,PDO在基因突变类型和特征方面与原始肿瘤保持一致。药物筛选试验显示,PDO模型对临床常用的化疗药物吉西他滨、伊立替康具有较好的敏感性。结论成功构建了一例胰腺癌PDO模型,该模型能够反应原始肿瘤的组织学和遗传学特征,并可以进行体外药物敏感性实验,证明了PDO模型的有效性,有望应用于胰腺癌的个体化治疗。

关键词：胰腺癌类器官药物筛选个体化治疗

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废旧磷酸铁锂粉料综合回收中试研究

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化工学报 2024年第6期75卷 2353-2361页

作者：江洋彭长宏陈伟周豪马忠彬李洪博邱在容张国鹏周康根中南大学冶金与环境学院湖南长沙410083 智亮新材料股份有限公司广西南宁530300

为研究废旧磷酸铁锂粉料(LFP/C)经高温煅烧-中和沉淀除杂后实现电池级磷酸铁和碳酸锂综合回收的效能,以氟/铝含量较高的废旧LFP/C为对象,构建了年处理规模为500 t的中试平台,从工艺稳定性、产品性能表征、初步经济评估及二次废渣再利用... 详细信息

为研究废旧磷酸铁锂粉料(LFP/C)经高温煅烧-中和沉淀除杂后实现电池级磷酸铁和碳酸锂综合回收的效能,以氟/铝含量较高的废旧LFP/C为对象,构建了年处理规模为500 t的中试平台,从工艺稳定性、产品性能表征、初步经济评估及二次废渣再利用等角度进行研究。结果显示,通过此法可实现高于85.63%铝去除和94.70%钛去除,除铝液中铁铝质量比由203增加至1077,为废旧LFP/C综合回收奠定基础。所制备的FePO_(4)及Li_(2)CO_(3)符合电池级标准,再生的LFP/C正极材料在0.1 C条件下首次充放电库仑效率可达95.2%,1 C条件下经过250圈循环后容量保持率达97.1%,展现出较好的电化学性能。此外,经济评估进一步凸显了该工艺在经济和环境效益方面的优越性。

关键词：废旧磷酸铁锂前体电化学性能中试规模经济分析

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