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Defect passivation of CsPbI2Br perovskites through Zn（Ⅱ） doping:toward efficient and stable solar cells

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Science China Chemistry 2019年第8期62卷 1044-1050页

作者： Jiajun lu Shan-Ci Chen Qingdong Zheng State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050China

Defect passivation is an important strategy to achieve perovskite solar cells(PVSCs) with enhanced power conversion efficiencies(PCEs) and improved stability because the trap states induced by defects in the interfaces and grain boundaries of perovskites are harmful to both large open circuit voltage and high photocurrent of devices. Here, zinc cations(Zn^2+) were used as a dopant to passivate defects of the CsPbI2Br perovskite leading to Zn^2+-doped CsPbI2Br film with fewer trap states, improved charge transportation, and enhanced light-harvesting ability. Thus, the best-performance PVSC based on CsPbI2 Br with the optimal Zn^2+doping shows a higher PCE of 12.16% with a larger open-circuit voltage(VOC) of 1.236 V, an improved shortcircuit current(JSC) of 15.61 mA cm^-2 in comparison with the control device based on the pure CsPbI2Br which exhibits a PCE of 10.21% with a VOCof 1.123 V, a JSCof 13.27 mA cm^-2. Time-resolved photoluminescence results show that the Zn^2+doping leads to perovskite film with extended photoluminescence lifetime which means a longer diffusion length and subsequently enhanced photocurrent and open circuit voltage. This work provides a simple strategy to boost the performance of PVSCs through Zn^2+doping.

关键词： CsPbI2Br perovskites defect passivation Zn(Ⅱ) doping all-inorganic perovskite solar cells power conversion efficiency

Offline experiment of land surface processes in Qinghai-Xizang Plateau

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Science China Earth Sciences 2004年第Z1期47卷 115-121页

作者： ZHANG Yanwu, lu Shihua, feng Qi, HUANG Jing & HU ZeyongCold and Arid Regions Environmental and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000, China Resource Environment College, Lanzhou University, Lanzhou 730000, China Cold and Arid Regions Environmental and Engineering Institute Chinese Academy of Sciences Lanzhou China Resource Environment College Lanzhou University Lanzhou China

The observational data of Beiluhe test of the Qinghai-Xizang railway in June 2002 are used as forcing field of the surface model to study the simulation performance in Qinghai-Xizang Plateau. The simulation result shows that the model (NCAR/LSM) can present the surface character tendency reasonably under observation forcing. In NCAR/LSM, the descriptions of the surface vegetation type in Qinghai-Xizang Plateau have much difference to what is actually happening. According to the actual characteristic of the surface, we define the grassland vegetation coverage rate is 0.6, and the vegetation canopy is 0.15 m, and the displacement height is 0.10 m. Compared the results with the old model's parameter in experiment, we find that the simulation air (2 m) temperature and the ground temperature are close to those of the observation, and the simulation temperature of peak value is better, and the simulation flux of the ground is sure to be improved too. So, if the surface and vegetation parameters are revised in LSM model, the simulation capability of the land surface process model can be improved effectively in Qinghai-Xizang Plateau.

关键词： Qinghai-Xizang Plateau land surface processes NCAR/LSM.

Identification of Phenolamine in Rape Bee Pollen and its Protective Effect and Mechanism on Alcoholic Liver Injury

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Food Science and Human Wellness 2023年

作者： Cheng Lv Mingjuan Xu Xinbiao Yang Yanlun feng Yun Zhu Qun lu Chengming Wang Rui liu College of Food Science and Technology， Huazhong Agricultural University Wuhan Engineering Research Center of Bee Products on Quality and Safety Control Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University)， Ministry of Education Key Laboratory of Urban Agriculture in Central China， Ministry of Agriculture and Rural Affairs

Rape bee pollen has attracted increasing interests for its excellent protective effect against chemical-induced liver injury owing to its abundant polyphenols. This study aims to analyze the types and contents of phenolamides (seldom concerned) in rape bee pollen and their protective mechanism on alcoholic liver disease (ALD). Different from the previous finding that flavonoids are dominant polyphenols in bee pollen polyphenolic extract， our results demonstrated that there are only three flavonoids but 24 phenolamides in the as-prepared PPE (rape bee pollen phenolic extract). In addition， PPE was found to significantly improve the viability (from 54.9% to 84.1%， 89.2%， and 94.0%) of alcohol-induced AML12 cells and alleviate alcohol-induced cell apoptosis (from 28.5% to 22.89%， 22.0%， and 17.4%). To dissect the underlying mechanism for the protective effect of PPE against ALD， the molecular pathway was identified by RNA-seq analysis. Transcriptome data revealed that PPE may protect against ALD by decreasing inflammation， cholesterol， and fatty acid synthesis (P luate the hepatoprotective effect of PPE in vivo， and the results validated that PPE could alleviate liver injury and hepatic steatosis (from 22.7% to 11.5% and 10.9%) induced by alcohol. As the dominant polyphenols in PPE， phenolamides can be a class of valuable polyphenolic compounds in bee pollen with the potential to alleviate ALD.

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Recent progress of physical failure analysis of GaN HEMTs

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Journal of Semiconductors 2021年第5期42卷 48-59页

作者： Xiaolong Cai Chenglin Du Zixuan Sun Ran ye Haijun Liu Yu Zhang Xiangyang Duan and Hai lu School of Electronic Science and Engineering Nanjing UniversityNanjing 210093 China Architecture Team Wireless Product Planning DepartmentZTE CorporationNanjing 210012China State Key Laboratory of Mobile Network and Mobile Multimedia Technology Shenzhen 518057China

Gallium nitride(GaN)-based high-electron mobility transistors(HEMTs) are widely used in high power and high frequency application fields, due to the outstanding physical and chemical properties of the GaN material. However, GaN HEMTs suffer from degradations and even failures during practical applications, making physical analyses of post-failure devices extremely significant for reliability improvements and further device optimizations. In this paper, common physical characterization techniques for post failure analyses are introduced, several failure mechanisms and corresponding failure phenomena are reviewed and summarized, and finally device optimization methods are discussed.

关键词： GaN high electron mobility transistors physical analysis failure mechanism

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高阶容积卡尔曼滤波及其在目标跟踪中的应用

哈尔滨工程大学学报 2016年第4期37卷 573-578页

作者：张龙崔乃刚杨峰路菲卢宝刚哈尔滨工业大学航天工程系黑龙江哈尔滨150001 北京航天长征飞行器研究所北京100076

针对传统的容积卡尔曼滤波(CKF)估计精度有限的问题,提出了一种基于任意阶容积规则的高阶容积卡尔曼滤波(HCKF)方法并应用于机动目标跟踪问题。传统的CKF采用三阶球面-相径容积规则,可获得优于其他非线性滤波如不敏卡尔曼滤波(UKF)的估... 详细信息

针对传统的容积卡尔曼滤波(CKF)估计精度有限的问题,提出了一种基于任意阶容积规则的高阶容积卡尔曼滤波(HCKF)方法并应用于机动目标跟踪问题。传统的CKF采用三阶球面-相径容积规则,可获得优于其他非线性滤波如不敏卡尔曼滤波(UKF)的估计精度和数值稳定性。为了进一步提高CKF的估计精度,在基于点的高斯近似滤波框架下,分别使用Genz积分方法和矩匹配法推导出任意阶的球面规则和相径规则,以此构造高阶球面-相径容积规则来计算高斯型积分,并建立高阶容积卡尔曼滤波算法。将提出的HCKF算法应用于机动目标跟踪问题中并进行数值仿真。仿真结果表明,相对于传统容积卡尔曼滤波,高阶容积卡尔曼滤波对目标位置和速度估计的精度分别提高了11%和24%,可获得更高的估计精度。

关键词：高阶容积卡尔曼滤波目标跟踪非线性系统贝叶斯估计球面相径规则容积规则

近空间高超声速飞行器输入饱和抑制模糊自适应控制

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宇航学报 2018年第9期39卷 985-993页

作者：路遥孙友路坤锋张世健北京航天自动控制研究所北京100854 中国人民解放军第四八零一工厂虎门军械修理厂东莞523938

针对近空间高超声速飞行器三通道姿态跟踪控制问题,提出了一种基于输入饱和抑制的非线性模糊自适应滑模控制器。考虑到飞行器模型具有严格反馈形式的特点,以反步法为基础,结合非奇异快速Terminal滑模方法设计控制器。设计了模糊系统估... 详细信息

针对近空间高超声速飞行器三通道姿态跟踪控制问题,提出了一种基于输入饱和抑制的非线性模糊自适应滑模控制器。考虑到飞行器模型具有严格反馈形式的特点,以反步法为基础,结合非奇异快速Terminal滑模方法设计控制器。设计了模糊系统估计模型中的干扰项,并通过自适应鲁棒项补偿估计误差,引入非线性增益函数提高控制系统的饱和抑制能力,并基于Lyapunov理论证明了闭环系统的稳定性。最后,通过仿真对比实验验证方法的有效性。仿真结果表明,所设计的控制器能够保证飞行控制系统在存在模型参数不确定性的情况下具有良好的姿态跟踪性能和输入饱和抑制能力。

关键词：近空间高超声速飞行器飞行控制反步法模糊系统自适应控制

Aberrant microRNA expression in the development of breast carcinoma

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Chinese Science Bulletin 2010年第31期55卷 3517-3526页

作者： WU Qian LI HaiLing lu Jiafeng GE QingYu lu ZuHong State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Nanjing 210096 China Department of Hygienic Analysis and Detection School of Public Health Nanjing Medical University Nanjing 210029 China

microRNAs,a class of small non-coding regulatory RNAs,are involved in oncogenesis and cancer *** have shown that aberrant miRNA expression occurs in breast cancer and is associated with specific clinicopathological *** miRNAs might act as suppressor genes or oncogenes,which can be considered as novel markers for breast cancer diagnosis and as prognostic *** we present a review of recent discoveries on miRNAs involved in breast cancer tumorigenesis,invasion,and metastasis.

关键词： microRNA 乳腺癌异常 miRNA 生发小分子RNA 非编码RNA 抑癌基因

Contrast-enhanced ultrasound manifestations of synchronous combined hepatocellular-cholangiocarcinoma and hepatocellular carcinoma:A case report

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World Journal of Clinical Cases 2022年第11期10卷 3615-3623页

作者： Ling Gao Jia-Yan Huang Zi-Jian lu Qiang lu Department of Ultrasound West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Ultrasound Chengdu BOE hospitalChengdu 610219Sichuan ProvinceChina Department of Pathology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Synchronous combined hepatocellular-cholangiocarcinoma(CHC)and hepatocellular carcinoma(HCC)is very rare,with few literature reports and poor clinical outcomes associated with the *** resection is the main treatment,which makes the preoperative diagnosis very ***,due to imaging manifestations overlapping with HCC,diagnosis of this type of synchronous cancer is challenging and it tends to be misdiagnosed as multiple ***,we report the contrast-enhanced ultrasound(CEUS)manifestations of a case of synchronous CHC and HCC,aiming at adding to the understanding of this *** displayed exquisite vascularity and tissue perfusion in real time with good spatial and temporal resolution and more accurately reflect tumor washin and washout times than contrast-enhanced computed tomography(CT)in this *** SUMMARY The patient was a 69-year-old female with a 20-year history of chronic hepatitis *** to months of epigastric pain and anorexia,she reffered to our hospital for *** days before hospitalization,abdominal magnetic resonance imaging performed at another hospital detected a space-occupying lesion in the *** her hospitalization,laboratory tests showed elevated alpha-fetoprotein and carbohydrate antigen 19-9 *** suspicious liver lesions located in S4 and S6,respectively,were identified in a cirrhotic background by abdominal contrast-enhanced CT(CECT).Furthermore,the lesion in S4 and S6 were detected by CEUS and assigned to CEUS LI-RADS 5 and M categories,*** patient underwent tumor radical ***-operative pathology confirmed the S4 and S6 lesions to be HCC and CHC,respectively.A newly-found suspicious liver nodule with potential malignancy was detected in liver S1 by both CEUS and CECT 7 mo after *** The CEUS characteristics of CHC and HCC are *** features in combination with clinical information could help in effective diagnosis,clinical decisio

关键词： Contrast-enhanced ultrasound Synchronous dual primary malignancies of liver Combined hepatocellular and cholangiocarcinoma Hepatocellular carcinoma Case report

中波HgCdTe双色红外探测器优化模拟计算

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物理学报 2007年第5期56卷 2882-2889页

作者：徐向晏叶振华李志锋陆卫中国科学院上海技术物理研究所红外物理国家重点实验室上海200083

针对光伏型中波HgCdTe双色红外探测器作了优化模拟计算,器件采用典型n-p-p-p-n结构和同时工作模式,建立的二维模型考虑了辐射复合、俄歇复合和Shockley-Read-Hall(SRH)复合三种复合机理,以及深能级辅助隧穿和带间直接隧穿效应,载流子穿... 详细信息

针对光伏型中波HgCdTe双色红外探测器作了优化模拟计算,器件采用典型n-p-p-p-n结构和同时工作模式,建立的二维模型考虑了辐射复合、俄歇复合和Shockley-Read-Hall(SRH)复合三种复合机理,以及深能级辅助隧穿和带间直接隧穿效应,载流子穿过阻挡层势垒的隧道效应采用传递矩阵法计算.分析了双色器件光谱响应随吸收区SRH复合少子(电子)寿命的变化关系,以及串音与阻挡层组分的关系.模拟结果显示,随吸收区少子寿命变短,量子效率迅速下降;为了使器件有较高的量子效率,HgCdTe材料的SRH复合电子寿命应该至少在10ns以上.随阻挡层组分增大,势垒增高,串音迅速减小,大约在阻挡层组分差为0.03时下降到光学串音决定的稳定值,得出了抑制电学串音,阻挡层组分差的临界值为0.03.

关键词： HgCdTe中波双色红外探测器光谱响应光谱串音少子寿命