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Performance improvement of solution-processed CdS/CdTe solar cells with a thin compact TiO_2 buffer layer

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Science Bulletin 2016年第1期61卷 86-91页

作者： Aashir Waleed Qianpeng Zhang Mohammad Mahdi Tavakoli Siu-Fung Leung Leilei Gu Jin He xiaoliang Mo Zhiyong fan Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Peking University Shenzhen SOC Key Laboratory PKUHKUST Shenzhen-Hongkong Instituition Department of Materials Science Fudan University

The device performance of CdS/CdTe solar cells largely depends on not only the back ohmic contact, but also the conformality of Cd S window layer coating. In order to reduce the light absorption loss in Cd S, the Cd S thickness is usually less than 100 nm. However, pinholes in Cd S and non-conformal coverage of Cd S on transparent conducting oxide layer will cause shunting thus leading to device performance degradation and failure. In this paper, low-temperature and low-cost fabrication methods, i.e., chemical bath deposition and electrochemical deposition, were used to deposit Cd S and Cd Te, respectively. It was found that the yield of device was around 20 % due to shunting. In order to alleviate this problem, a compact layer of TiO2 was inserted between the fluorine-doped tin oxide and Cd S as a buffer layer. The thickness effect of TiO2 was studied and showed that devices with thin(20 nm thickness) TiO2 performed better than the counterparts with thick layers. It was discovered that device yield improved to 80 % and stability in air substantially improved with TiO2 layer.

关键词： Thin films Titanium dioxide Solarenergy Cadmium compounds

聚对二氧环己酮/聚乙烯醇复合水凝胶的制备及性能

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高分子材料科学与工程 2024年第1期40卷 57-65页

作者：郭守城邢瑞权杜学超范雨薪周善立庞晓旭于晓亮樊志郭敏杰天津科技大学化工与材料学院天津科技大学生物源纤维制造技术国家重点实验室天津300457

在聚乙烯醇(PVA)水凝胶的网络中引入完全生物降解的聚对二氧环己酮(PPDO),采用冻融法制备出生物降解周期可控的PPDO/PVA复合水凝胶。通过调整低分子量PPDO与高分子量PVA之间的比例,使PPDO柔性分子链与PVA分子链之间形成聚合物网络互穿结... 详细信息

在聚乙烯醇(PVA)水凝胶的网络中引入完全生物降解的聚对二氧环己酮(PPDO),采用冻融法制备出生物降解周期可控的PPDO/PVA复合水凝胶。通过调整低分子量PPDO与高分子量PVA之间的比例,使PPDO柔性分子链与PVA分子链之间形成聚合物网络互穿结构,实现改善水凝胶力学性能和生物降解性能的目的。采用红外光谱、扫描电镜和万能试验机对水凝胶进行了结构表征和性能测试;并通过溶胀性能及失水性能测试、降解性能测试和抑菌性测试对水凝胶进行了研究。结果表明,PPDO/PVA复合水凝胶呈现出孔隙均匀的三维网络结构,拉伸强度和压缩强度与纯PVA水凝胶相比提高了1~3倍;在37℃的PBS缓冲溶液中降解,降解速率明显提升,35 d可以降解45%,且在伤口愈合的周期内保持优异的力学强度。平板细菌培养实验证明了复合水凝胶具有抑菌的特性。PPDO/PVA复合水凝胶在伤口敷料领域具有广泛的应用前景。

关键词：聚对二氧环己酮水凝胶冻融法伤口敷料

Clean water generation with switchable dispersion of multifunctional Fe3O4-reduced graphene oxide particles

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Progress in Natural Science:Materials International 2018年第4期28卷 422-429页

作者： Ruijie Zhao Jiale Xu Peng Tao Fenglei Shi fan Yu xiaoliang Zeng Chengyi Song Jianbo Wu Wen Shang Tao Deng State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Guangdong Provincial Key Laboratory of Materials for High Density Electronic Packaging Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences

With the increased need for clean water and decreased supply of fresh water, purification of contaminated water can provide clean water that supplements the fresh water from nature. Physical adsorption, photo-degradation and solar-driven evaporation processes are promising ways to generate clean water with minimum environmental impact. However, different purification process requires different dispersion state of the treating agent to maximize its performance. Herein, we demonstrate that Fe3O4-reduced graphene oxide(MrGO) particles with switchable dispersion can be used as the multifunctional water treating agents to efficiently purify contaminated water through different processes. Under homogenously dispersed nanofluid mode, the MrGO particles have large exposed surface areas and can efficiently remove organic dye pollutants through physical adsorption. The uniform dispersion state also favors high contact efficiency facilitating decontamination of high concentration of organic compounds through solar-driven photocatalytic degradation by the MrGO particles. The excellent magnetic response of MrGO particles not only allows for easy collection of the treating agent from water but also enables assembly of MrGO at the air-water interface with external magnets. Under such interfacial assembled mode, clean water can be distilled out of the contaminated solution with high evaporation efficiency of 74.7% under simulated natural solar radiation. This work demonstrates that dispersion state can be used as another important means to optimize water purification performances.

关键词： Adsorption Photo-degradation Evaporation Dispersion state Water treatment

延胡索配方颗粒多指标成分的近红外光谱快速检测方法

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中国医药科学 2022年第9期12卷 79-81,86页

作者：周燕张纯范晓良浙江省嘉兴市食品药品与产品质量检验检测院浙江嘉兴314001 浙江中医药大学附属嘉兴中医院浙江嘉兴314001

目的建立延胡索配方颗粒水分、醇溶性浸出物、延胡索乙素、去氢延胡索甲素多指标的近红外光谱快速检测方法。方法以已知的延胡索配方颗粒水分、醇溶性浸出物、延胡索乙素、去氢延胡索甲素含量值为对照,运用偏最小二乘法(PLS)选择合适的... 详细信息

目的建立延胡索配方颗粒水分、醇溶性浸出物、延胡索乙素、去氢延胡索甲素多指标的近红外光谱快速检测方法。方法以已知的延胡索配方颗粒水分、醇溶性浸出物、延胡索乙素、去氢延胡索甲素含量值为对照,运用偏最小二乘法(PLS)选择合适的光谱范围及光谱预处理方法建立近红外定量模型,并对验证集样品各指标成分的含量进行验证。结果水分、醇溶性浸出物、延胡索乙素、去氢延胡索甲素预测值与实测值的平均相对偏差分别为1.18%、2.19%、3.14%、1.73%,预测相关系数R2分别为0.979、0.915、0.948、0.962,准确度较高。结论研究建立的近红外定量模型可应用于延胡索配方颗粒中水分、醇溶性浸出物、延胡索乙素、去氢延胡索甲素含量4个指标成分的快速检测,并可为其他中药配方颗粒的快速检测提供参考。

关键词：近红外光谱延胡索配方颗粒快速检测

Robust adaptive fault-tolerant control of a tandem coaxial ducted fan aircraft with actuator saturation

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Chinese Journal of Aeronautics 2018年第6期31卷 1298-1310页

作者： xiaoliang WANG Changle XIANG Homayoun NAJJARAN Bin XU Vehicle Research Center School of Mechanical Engineering Beijing Institute of Technology Okanagan School of Engineering The University of British Columbia

This paper is concerned with the robust adaptive fault-tolerant control of a tandem coaxial ducted fan aircraft under system uncertainty, mismatched disturbance, and actuator *** the proposed aircraft, comprehensive controllability analysis is performed to evaluate the controllability of each state as well as the margin to reject mismatched disturbance without any knowledge of the controller. Mismatched disturbance attenuation is ensured through a structured Hinfinity controller tuned by a non-smooth optimization algorithm. Embedded with the H-infinity controller, an adaptive control law is proposed in order to mitigate matched system uncertainty and actuator fault. Input saturation is also considered by the modified reference model. Numerical simulation of the novel ducted fan aircraft is provided to illustrate the effectiveness of the proposed method. The simulation results reveal that the proposed adaptive controller achieves better transient response and more robust performance than classic Model Reference Adaptive Control（MRAC） method, even with serious actuator saturation.

关键词： Comprehensive controllability Ducted fan aircraft Fault-tolerant Input saturation Robust adaptive control

A soft X-ray cryogenic radiometer built on BSRF

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Radiation Detection Technology and Methods 2018年第2期2卷 8-13页

作者： xiaoliang Zhao Yidong Zhao Kun Tang Yashuai Zhao fan Li Lei Zheng Shuhu Liu Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences(UCAS) Beijing 100049China Academy of Opto-Electronics Chinese Academy of SciencesBeijing 100094China

Introduction In the field of the high injection rate X-ray meterage,currently there are no national standards in China,which are urgently needed in areas such as inertial confinement fusion diagnosis and aerospace ***,many metrology laboratories have developed their own meterage standards based on Cryogenic *** one soft X-ray cryogenic radiometer has been installed at 4B7B experiment station on Beijing Synchrotron Radiation Facility to measure the X-ray power from 50 nW to 1μ*** The purpose is to verify the accuracy of the X-ray power measurement and the performance of the cryogenic *** The spectral responsivity of a Si photodiode detector calibrated in the Physikalisch-Technische Bundesanstalt of Germany is calibrated at 750eV again with the cryogenic radiometer based on synchrotron light *** Some important performance parameters(e.g.,time constant,responsivity,and nonequivalence error)of the cryogenic radiometer were measured and were in agreement with the design *** results show that total relative uncertainties of X-ray power measurement were below 1%(k=1),and that good consistency was received compared with the calibrations done by the *** The cryogenic radiometer built at 4B7B is reliable and accurate for soft X-ray power *** the performance of the cryogenic radiometer is also very good.

关键词： Meterage standard Cryogenic radiometer Synchrotron radiation Detector calibration Relative uncertainties

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核桃炭疽病病原菌越冬方式及场所的研究

林业与生态科学 2020年第2期35卷 182-185页

作者：王雪菲樊晓亮王新茹霍亚蕾苏筱雨朱会营阎爱华李会平河北农业大学林学院河北保定071000 河北雾灵山国家级自然保护区管理中心河北承德067300 天域生态环境股份有限公司上海200082

为明确河北省邢台市核桃炭疽病的越冬方式及越冬场所,于2018年12月和2019年3月越冬季节采集核桃树上发病的带芽枝条、带果柄果实、落果、落叶以及林下土壤,观察子实体着生情况,测定越冬子实体内孢子萌发率,对采集的组织以及土壤进行室... 详细信息

为明确河北省邢台市核桃炭疽病的越冬方式及越冬场所,于2018年12月和2019年3月越冬季节采集核桃树上发病的带芽枝条、带果柄果实、落果、落叶以及林下土壤,观察子实体着生情况,测定越冬子实体内孢子萌发率,对采集的组织以及土壤进行室内病原菌的分离培养。结果表明,核桃炭疽病病原菌可以子实体的形式在树上果壳和落果上越冬,越冬后子实体萌发率分别达96.82%,94.36%。该病菌也可以菌丝体的形式在果壳、果仁、果柄、芽鳞、枝条、落果果壳、落果果仁中越冬,越冬后病原菌分离率达60%~82%,少数可以在叶柄中越冬,越冬后分离率为27.59%。土壤也是其重要越冬场所,1 g土壤中病原菌数量为2.0×10^5个。

关键词：核桃炭疽病子实体菌丝体越冬方式越冬场所

新工科背景下食品生物类专业创新人才培养体系探索实践

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食品工业 2024年第6期45卷 274-278页

作者：任海伟张丙云范文广赵小亮李志忠唐爱丽兰州理工大学生命科学与工程学院兰州730050

创新能力培养是新工科背景下食品生物类专业人才培养的关键。结合新工科建设内涵和区域经济产业发展需求,探索构建“12345+X”(即1个目标、2个课堂、3个阶段、4个层次、5个计划、X个元素)的创新创业教育体系,阐述“12345+X”创新人才培... 详细信息

创新能力培养是新工科背景下食品生物类专业人才培养的关键。结合新工科建设内涵和区域经济产业发展需求,探索构建“12345+X”(即1个目标、2个课堂、3个阶段、4个层次、5个计划、X个元素)的创新创业教育体系,阐述“12345+X”创新人才培养体系的主要实施途径和成效。实践表明,该体系有效提升学生的创新实践能力,对专业建设发展起到积极支撑作用,为地方院校新工科创新人才培养提供借鉴。

关键词：新工科创新人才培养体系探索实践

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4个锥栗品种坚果品质比较

湖北林业科技 2022年第5期51卷 18-22页

作者：何扬清朱国斌范小良湖南省汝城县林业局郴州424100 汝城县锥栗良益合作社郴州424100

为科学评价和鉴定锥栗的品质特性以及加工利用提供理论参考依据,本研究以4个湖南省选育的锥栗品种‘华栗1号’‘华栗2号’‘华栗3号’‘华栗4号’为试材,测定和比较了4个锥栗品种坚果外观品质指标、内在品质指标及坚果中6种营养元素的... 详细信息

为科学评价和鉴定锥栗的品质特性以及加工利用提供理论参考依据,本研究以4个湖南省选育的锥栗品种‘华栗1号’‘华栗2号’‘华栗3号’‘华栗4号’为试材,测定和比较了4个锥栗品种坚果外观品质指标、内在品质指标及坚果中6种营养元素的含量。结果表明:4个锥栗品种坚果品质存在不同水平的差异性。其中,‘华栗1号’单果重(11.68 g)显著高于其他品种,属大果型,可溶性糖(10.08%)、维生素C(325.80μg·g^(-1))、Zn(5.34μg·g^(-1))、Cu(5.57μg·g^(-1))含量也最高,其余营养成分较高;‘华栗2号’单果重8.39 g,属于中等果型,K(0.39%)、Ca(370.67μg·g^(-1))、Zn(5.34μg·g^(-1))含量最高,可溶性糖、蛋白质、Fe含量较高;‘华栗3号’单果重8.85 g,属中等型,坚果光泽油亮,外观漂亮,淀粉(36.97%)、Ca(366.67μg·g^(-1))、Fe(10.03μg·g^(-1))含量最高,可溶性糖、维生素C、Cu含量较高;‘华栗4号’单果重8.29 g,属中等果型,蛋白质、脂肪含量最高,K、Zn、Cu含量较高。

关键词：锥栗外观品质内在品质矿质元素湖南