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Influence of Annealing on Microstructure and Photoluminescence Properties of Al-Doped ZnO Films

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Journal of Rare Earths 2006年第Z1期24卷 68-71页

作者： Xu Ziqiang Deng Hong Xie Juan Li Yan cheng hang School of Microelectronics and Solid-State Electronics University of Electronic Science and Technology of ChinaChengdu 610054China

Effect of annealing temperature and time on the microstructure and photoluminescence(PL)properties of Al doped ZnO thin films deposited on Si(100)substrates by sol-gel method was *** X-ray diffraction(XRD)was used to analyze the structural properties of the thin *** the thin films have a preferential c-axis orientation,which are enhances in the annealing *** is found from the PL measurement that near band edge(NBE)emission and deep-level(DL)emissions are observed in as-grown ZnO∶Al thin ***,the intensity of DLE is much smaller than that of *** of NBE is clearly observed after thermal annealing in air and the intensity of NBE increases with annealing *** also show that the PL spectrum is dependent not only on the processing temperature but also on the processing *** DLE related defects can not be removed by annealing,and on the contrary,the annealing conditions actually favor their formation.

关键词： sol-gel ZnO∶Al thin films annealing photoluminescence

Rapid construction of the tricyclic cores of the abietane- and icetexane-type diterpenoids

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Chinese Chemical Letters 2011年第7期22卷 774-776页

作者： De Lin Chen Xiao Yu Liu hang cheng Feng Peng Wang Department of Chemistry of Medicinal Natural Products West China College of Pharmacy Sichuan University Chengdu 610041 China

A short synthesis of the tricyclic 6-6-6 and 6-7-6 ring systems of the abietane- and icetexane-type diterpenoids from a common intermediate is presented, using alkylation and acid-catalyzed cyclization as key steps.

关键词： Abietanes Icetexanes Alkylation Cyclization

IL-25 blockade inhibits metastasis in breasl cancer

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Protein & Cell 2017年第3期8卷 191-201页

作者： Zhujun Jiang Jingtao Chen Xuemei Du hang cheng Xiaohu Wang Chen Dong Institute for Immunology and School of Medicine Tsinghua University Beijing 100084 China Institute of Translational Medicine The First Hospital Jilin University Chanqchun 130031 China Department of Pathology Beijing Shijitan Hospital of Capital Medical University Beijing 100038 China Department of Pediatrics The First Hospital Jilin University Changchun 130031 China

Metastasis is the leading cause of death in breast cancer patients. However, the mechanisms underlying metasta- sis are not well understood and there is no effective treatment in the clinic. Here, we demonstrate that in MMTV- PyMT, a highly malignant spontaneous breast tumor model, IL-25 （also called IL-17E） was expressed by tumor- infiltrating CD4＋ T cells and macrophages. An IL-25 neu- tralization antibody, while not affecting primary tumor growth, substantially reduced lung metastasis. Inhibition of IL-25 resulted in decreased type 2 T cells and macro- phages in the primary tumor microenvironments, both reported to enhance breast tumor invasion and subse- quent metastasis to the lung. Taken together, our data suggest IL-25 blockade as a novel treatment for metastatic breast tumor.

关键词： IL-25 breast cancer metastasis MMTV-PyMT

Plastic limit load analysis for pressure pipe with incomplete welding defects based on the extended Net Section Collapse Criteria

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第6期11卷 440-448页

作者： Zhi-jiang JIN cheng-hang JIANG Xian-ping WAN Po CHEN Xiao-fang WANG Institute of Chemical Process Equipment Zhejiang University Hangzhou 310027 China

With von Mises yield criterion,the loading range of Net Section Collapse(NSC) Criteria is extended from combined tension and bending loadings to combined bending,torsion and internal pressure loadings.A new theoretical analyzing method of plastic limit load for pressure pipe with incomplete welding defects based on the extended NSC Criteria is presented and the correlative formulas are deduced,the influences of pipe curvature,circumferential length and depth of incomplete welding defects on the plastic limit load of pressure pipe are considered as well in this ***,according to the orthogonal experimental design method,the plastic limit loads are calculated by the finite element method and compared with the theoretical *** results show that the expressions of plastic limit load of pressure pipe with incomplete welding defects under bending,torsion and internal pressure based on extended NSC criteria are *** study provides an important theoretical basis for the establishment of safety assessment measure towards pressure pipe with incomplete welding defects.

关键词： Net Section Collapse(NSC) Criteria Incomplete welding defects Pressure pipe Plastic limit load Finite element

Guards at the gate： physiological and pathological roles of tissue-resident innate lymphoid cells in the lung

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Protein & Cell 2017年第12期8卷 878-895页

作者： hang cheng chengyan Jin Jing Wu Shan Zhu Yong-Jun Liu Jingtao Chen Institute of Translational Medicine The First Hospital Jilin University Changchun 130061 China Department of Pediatrics The First Hospital JUin University Changchun 130021 China Department of Thoracic Surgery The Second Hospital Jilin University Changchun 130041 China Sanofi Research and Development Cambridge MA 02139 USA

The lung Is an Important open organ and the primary site of respiration. Many *** diseases develop in the lung, e.g., pneumonia, asthma, chronic obstructive pulmonary diseases （COPDs）, pulmonary fibrosis, and lung cancer. In the lung, innate Immunity serves as the frontline in both anti-irritant response and anti-tumor defense and is also critical for mucosal homeostasis; thus, it plays an important role In containing these pul- monary diseases. Innate lymphoid cells （ILCs）, charac. terized by their strict tissue residence and distinct function in the mucosa, are attracting Increased atten. tion In innate Immunity. Upon sensing the danger slg- nals from damaged epithelium, ILCs activate, proliferate, and release numerous cytoklnes with specific local functions; they also participate in mucosal immune- surveillance, Immune-regulation, and homeostasis. However, when their functions become uncontrolled, ILCs can enhance pathological states and Induce dis- eases. In this review, we discuss the physiologicel and pathological functions of ILC subsets 1 to 3 in the lung, and how the pathogenic environment affects the func- tion and plasticity of ILCs.

关键词： lung innate lymphoid cells pulmonarydiseases regional immunity

Application of waste frying oils in the biosynthesis of biodemulsifier by a demulsifying strain Alcaligenes sp.S-XJ-1

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Journal of Environmental Sciences 2011年第6期23卷 1020-1026页

作者： Jia Liu Kaiming Peng Xiangfeng Huang Lijun Lu hang cheng Dianhai Yang Qi Zhou Huiping Deng Tongji University Shanghai 200092 China College of Environmental Science & Engineering State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China

Exploration of biodemulsifiers has become a new research *** waste frying oils（WFOs） as carbon source to synthesize biodemulsifiers has a potential prospect to decrease production cost and to improve the application of biodemulsifiers in the *** this study,a demulsifying strain,Alcaligenes sp.S-XJ-1,was investigated to synthesize a biodemulsifier using waste frying oils as carbon *** was found that the increase of initial pH of culture medium could increase the biodemulsifier yield but decrease the demulsification ratio compared to that using paraffin as carbon *** addition,a biodemulsifier produced by waste frying oils and paraffin as mixed carbon source had a lower demulsification capability compared with that produced by paraffin or waste frying oil as sole carbon ***-batch fermentation of biodemulsifier using waste frying oils as supplementary carbon source was found to be a suitable *** of waste frying oils utilization was studied by using tripalmitin,olein and tristearin as sole carbon sources to synthesize *** results showed saturated long-chain fatty acid was diffcult for S-XJ-1 to utilize but could effectively enhance the demulsification ability of the produced ***,FT-IR result showed that the demulsification capability of biodemulsifiers was associated with the content of C=O group and nitrogen element.

关键词： waste frying oils biodemulsifier fatty acid glyceride Alcaligenes sp.

除尘技术研究进展和袋式除尘ISO标准（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2018年第1期19卷 21-33页

作者： cheng-hang ZHENG Chikao KANAOKA State Key Laboratory of Clean Energy Utilization State Environmental Protection Center for Coal-fired Air Pollution Control Zhejiang University Hangzhou 310027 China Kanazawa University Kanazawa 920-1161 Japan

目的:分析当前最新的针对烟气中颗粒物的高效脱除技术,包括静电除尘和袋式除尘的提效方法、原理以及所能达到的效果等;对研究现状进行评述和对未来发展做出展望,并介绍袋式除尘的相关ISO标准。创新点:1.总结了各参数对静电除尘器(包括... 详细信息

目的:分析当前最新的针对烟气中颗粒物的高效脱除技术,包括静电除尘和袋式除尘的提效方法、原理以及所能达到的效果等;对研究现状进行评述和对未来发展做出展望,并介绍袋式除尘的相关ISO标准。创新点:1.总结了各参数对静电除尘器(包括低低温静电除尘、高温静电除尘和湿式静电除尘等)除尘效率的影响;2.分析比较了不同结构形式的滤袋并总结了适应更高过滤要求的新型过滤材料。方法:1.通过数据分析,比较不同粒径、比电阻和温度对静电除尘器除尘效率的影响,并提出相关改进措施;2.比较不同形式滤袋的收尘特点,结合ISO标准和当前工业需求,对袋式除尘进行展望。结论:1.为保证除尘效率,对于不同特性的粉尘,可采取不同形式的静电除尘器增效技术;2.为满足更高的过滤要求,在袋式除尘器方面,急需开发新型过滤材料和优化清灰技术,以适应更高的温度和满足更高的清灰要求。

关键词：除尘静电除尘器滤袋 ISO标准

Polycyclic aromatic hydrocarbon in urban soil from Beijing, China

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Journal of Environmental Sciences 2006年第5期18卷 944-950页

作者： LI Xing-hong MA Ling-ling LIU Xiu-fen FU Shan cheng hang-xin XU Xiao-bai State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Institute of Geophysical and Geochemical Exploration Langfang 065000 China

Polycyclic aromatic hydrocarbons （EPA-PAHs） in the urban surface soils from Beijing were determined using gas chromatography and mass spectrometry （GC-MS）. It is significantly complementary for understanding the PAHs pollution in soil of integrated Beijing city on the basis of the information known in the outskirts. The total concentration of 16 EPA-PAH was from 0.467 to 5.470 μg/g and was described by the contour map. Compound profiles presented that the 4-, 5- and 6-ring PAHs were major compositions. The correlation analysis showed that PAHs have the similar source in the most sampling sites and BaP might be considered as the indicator of PAHs. Characteristic ratios of anthracene （An）/（An＋ phenanthrene （Phe））, fluoranthene （Flu）/（Flu/ pyrene （Pyr）） and benzo[a]pyrene （BaP）/laenzo[g,h,i]perylene （BghiP） indicated that the PAHs pollutants probably mainly originated from the coal combustion and it was not negligible from vehicular emission. The level of PAHs in our study area was compared with other studies.

关键词： PAHs urban soil source Beijing

Random gradient-free method for online distributed optimization with strongly pseudoconvex cost functions

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Control Theory and Technology 2024年第1期22卷 14-24页

作者： Xiaoxi Yan cheng Li Kaihong Lu hang Xu School of Electrical and Information Engineering Jiangsu UniversityZhenjiang212013JiangsuChina College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao266590ShandongChina

This paper focuses on the online distributed optimization problem based on multi-agent systems. In this problem, each agent can only access its own cost function and a convex set, and can only exchange local state information with its current neighbors through a time-varying digraph. In addition, the agents do not have access to the information about the current cost functions until decisions are made. Different from most existing works on online distributed optimization, here we consider the case where the cost functions are strongly pseudoconvex and real gradients of the cost functions are not available. To handle this problem, a random gradient-free online distributed algorithm involving the multi-point gradient estimator is proposed. Of particular interest is that under the proposed algorithm, each agent only uses the estimation information of gradients instead of the real gradient information to make decisions. The dynamic regret is employed to measure the proposed algorithm. We prove that if the cumulative deviation of the minimizer sequence grows within a certain rate, then the expectation of dynamic regret increases sublinearly. Finally, a simulation example is given to corroborate the validity of our results.

关键词： Multi-agent system Online distributed optimization Pseudoconvex optimization Random gradient-free method