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高电压技术 2013年第9期39卷 2267-2272页

作者： liu jianjun {2. Haibing HU {2.{2. {2. Xingwen YANG Zefeng JIA Shen{2. e Shanghai institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi'an 710049 China

This work is devoted to experimentally study the characteristics of discharge plasma in high power xenon *** the experiments,plasma channel profiles are captured by using a high speed CCD camera,and the radiation energy of the flashlamp is obtained by a pyroelectric energy *** and current curves are recorded to shed light on the plasma *** these diagnostic methods,typical factors influencing the evolution process of plasma channel are studied,including the external electric field and the *** electric potential distribution in the flashlamp influence the plasma channel characteristics the most *** plasma channel pattern for the cases with grounded wires is different from that with ungrounded metal *** the wire is ungrounded,it is the coupling voltage between the metal wire and the flashlamp that influences the development of plasma *** terms of radiation efficiency,it is proven that there is an optimal interval within 2.0～3.0μs between the pre-ionization pulse and the main pulse.

关键词：放电等离子体等离子体特性大功率脉冲氙闪光灯预电离外电场等离子体通道 CCD摄像机

Spatial pattern of macrobenthic communities along a shelf-slope-basin transect across the Bering Sea

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Acta Oceanologica Sinica 2018年第6期37卷 72-81页

作者： liN Heshan liu Kun WANG {2. HUANG Yaqin li Zhong liN Junhui HE Xuebao ZHANG Shuyi MOU Jianfeng WANG Yu XING Bingpeng Laboratory of Marine Biology and Ecology Third Institute of Oceanography State Oceanic Administration College of Biotechnology Tianjin University of Science and Technology Fisheries College Jimei University

Due to its unique geological location, the Bering Sea is an ideal place to investigate the water exchange and ecosystem connectivity of the Pacific Ocean–Arctic Ocean and subarctic–Arctic region. Based on a number of summer surveys（July to September, 2.10, 2.12.and 2.14）, macrobenthic communities and their spatial-temporal patterns are exhibited for the majority of the Bering Sea（53.59′–64°3.′N）. The results show that the macrobenthic communities were dominated by northern cold-water species and immigrant eurythermic species, and the communities assumed a dispersed and patchy distribution pattern. Polychaetes（Scoloplos armiger）, crustaceans（Ceradocus capensis） and sea urchins（Echinarachnius parma） were the main dominant groups in the shallow shelves; the sea star（Ctenodiscus crispatus） and the brittle star（Ophiura sarsii） were the main dominant groups in the continental slope; whereas small polychaetes（Prionospio malmgreni） dominated the basin area. Sediment type, water depth, and currents were the major factors affecting the structure and spatial distribution of the macrobenthic communities. Compared with other seas, the shallow areas of the Bering Sea showed an extremely high-standing biomass. In particular, the northern shelf area（north of St. Lawrence Islands and west of 170°W）,which is primarily controlled by Anadyr Water, is an undersea oasis. In contrast, a deficiency in the downward transport of particulate organic carbon has resulted in a desert-like seabed in the basin area. By comparing our results to previous studies, we found that macrobenthic communities of the Bering Sea have undergone significant structural changes in recent decades, resulting in a decrease in abundance and an increase in *** addition, populations of amphipods and bivalves in the northern shelves have decreased significantly and have been gradually replaced by other species. These changes might be associated with advanced seasonal ice melting,changes in organic carbon input, a

关键词： macrobenthos community structure Arctic Bering Sea environmental drivers

PagGRF12. interacts with PagGIF1b to regulate secondary xylem development through modulating PagXND1a expression in Populus alba×***

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Journal of Integrative Plant Biology 2021年第10期63卷 1683-1694页

作者： Jinnan Wang Houjun Zhou Yanqiu Zhao Cheng Jiang Jihong li Fang Tang Yingli {2. Shutang Zhao {3. Hu Xueqin Song MengZhu Lu State Key Laboratory of Tree Genetics and Breeding Key Laboratory of Tree Breeding and Cultivation of the State ForestryAdministrationResearch Institute of ForestryChinese Academy of ForestryBeijing 100091China Key Laboratory of Agricultural Ecology and Environment College of ForestryShandong Agricultural UniversityTai'an 271018China School of Agriculture Ludong UniversityYantai 264025China State Key Laboratory of Subtropical Silviculture School of Forestry and BiotechnologyZhejiang Agriculture&Forestry UniversityHangzhou 311300China CoInnovation Center for Sustainable Forestry in Southern China Nanjing Forestry UniversityNanjing 210037China

Growth-regulating factors(GRFs)are important regulators of plant development and growth,but their possible roles in xylem development in woody plants remain ***,we report that Populus alba×Papulus glandulosa PagGRF12. negatively regulates xylem development in ***12. is expressed in vascular *** to non-transgenic control plants,transgenic poplar plants overexpressing PagGRF12. exhibited reduced xylem width and plants with repressed expression of PagGRF12. exhibited increased xylem *** NAC domain 1(XND1)encodes a NAC domain transcription factor that regulates xylem development and transcriptional analyses revealed that PagXND1a is highly upregulated in PagGRF12.-overexpressing plants and downregulated in PagGRF12.-suppressed plants,indicating that PagGRF12. may regulate xylem development through *** transcriptional assays and chromatin immunoprecipitation-polymerase chain reaction assays confirmed that PagGRF12. directly upregulates *** addition,PagGRF12. interacts with the GRF-Interacting Factor(GIF)PagGIF1b,and this interaction enhances the effects of PagGRF12. on *** results indicate that PagGRF12. inhibits xylem development by upregulating the expression of PagXND1a.

关键词： GRF GIF1 Populus wood formation XND1 xylem development

不同尺度缺陷对超导线圈绝缘复合材料机械性能的影响研究

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天津科技 2024年第10期51卷 26-29页

作者：侯艳青刘小川李建军魏鑫成马媛媛陶博伟安徽理工大学安徽淮南232001 合肥综合性国家科学中心能源研究院(安徽省能源实验室) 安徽合肥230051 西南交通大学四川成都610031 中国科学院等离子体物理研究所安徽合肥230031

绝缘系统对超导线圈起绝缘、固定和支撑的作用,极低温度、大电流、高磁场等极端条件使得超导线圈承受较大的应力及应变,这对线圈绝缘力学性能提出了更高的要求。以超导线圈中的绝缘系统为研究对象,开展含有不同尺度缺陷的绝缘复合材料... 详细信息

绝缘系统对超导线圈起绝缘、固定和支撑的作用,极低温度、大电流、高磁场等极端条件使得超导线圈承受较大的应力及应变,这对线圈绝缘力学性能提出了更高的要求。以超导线圈中的绝缘系统为研究对象,开展含有不同尺度缺陷的绝缘复合材料低温下力学性能测试试验。结果表明,直径小于3.mm的空隙或夹渣等缺陷对绝缘复合材料的机械性能并未产生太大影响,这对于评定超导线圈中绝缘系统质量具有一定参考价值。

关键词：超导线圈绝缘系统缺陷低温机械性能

Efficacy of platinum in advanced triple-negative breast cancer with germline BRCA mutation determined by next generation sequencing

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chinese Journal of Cancer Research 2020年第2期32卷 149-162页

作者： Nan Wang Kun li Wenfa Huang Weiyao Kong Xiaoran liu Weijie Shi Feng Xie Hanfang Jiang Guohong Song lijun Di Quanren Wang {3. Yu Huiping li Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of Breast OncologyPeking University Cancer Hospital and InstituteBeijing 100142China Huidu Shanghai Medical sciences Shanghai 201499China Jiangsu Hengrui Medicine Shanghai 200120China

Objective:To compare the efficacy of platinum-and non-platinum-based regimens as first-line treatment for advanced triple-negative breast cancer(TNBC)and analyze the relationship between their efficacy and BRCA gene ***:Retrospectively analyze clinical data of 2.0 patients diagnosed pathologically with advanced TNBC and treated at the Department of Breast Oncology,Peking University Cancer Hospital from 2.13.to 2.18 and evaluate the efficacy of chemotherapy.A total of 114 patients had BRCA1/2.gene tested by next generation sequencing(NGS)using peripheral blood,and we analyzed the correlation between their efficacy and BRCA1/2.gene ***:Non-platinum-based chemotherapy(NPCT)was administered to 12. and platinum-based chemotherapy(PBCT)to 91 study *** clinical benefit rate(CBR)and median progression-free survival(PFS)were not statistically different between NPCT and PBCT *** median overall survival(OS)was 3..0 and 2..5 months for PBCT and NPCT group,respectively[P=0.090,hazard ratios(HR)=0.703..BRCA status was assessed in 114 patients,14 of whom had deleterious germline BRCA1/2.g BRCA)mutations(seven in each group).In PBCT group,the CBR was 85.7%and 3..1%for patients with and without deleterious g BRCA mutations,respectively(P=0.03.).The median PFS were 14.9 and 5.3.months and median OS were 2..5 and 15.5 months for patients with and without deleterious g BRCA mutations,respectively(P=0.001,P=0.161,respectively).Patients in PBCT group had significantly greater rates of grade 3.4 anemia(5.5%vs.0%)and thrombocytopenia(8.8%vs.0%),whereas palmar-plantar erythrodysesthesia(12.4%vs.0%)and peripheral neuropathy(8.6%vs.1.1%)occurred more frequently in NPCT ***:Platinum-based regimens are more effective in patients with deleterious g BRCA mutations,but no difference in patients without BRCA gene mutations,so non-platinum is an option in patients without BRCA gene mutations considering the toxicity and side *** we recommend

关键词： Advanced breast cancer triple negative BRCA mutation next-generation sequencing platinum efficacy

Double cores of the Ozone Low in the vertical direction over the Asian continent in satellite data sets

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Earth and Planetary Physics 2019年第2期3卷 93-101页

作者： Zhou Tang Dong Guo YuCheng Su ChunHua Shi ChenXi Zhang Yu liu XiangDong Zheng WenWen Xu jianjun Xu RenQiang liu Wei{3.ang {3. Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science & Technology The Global Environment and Natural Resources institute (GENRI) College of Science George Mason University Center for Atmospheric Science Hampton University chinese academy of Meteorological {2. Guangdong Ocean University

Using four satellite data sets(TOMS/SBUV, OMI, MLS, and HALOE), we analyze the seasonal variations of the total column ozone(TCO) and its zonal deviation(TCO*), and reveal the vertical structure of the Ozone Low(OV) over the Asian continent. Our principal findings are:(1) The TCO over the Asian continent reaches its maximum in the spring and its minimum in the autumn. The Ozone Low exists from May to September.(2. The Ozone Low has two negative cores, located in the lower and the upper stratosphere. The lower core is near 3. hPa in the winter and 70 hPa in the other seasons. The upper core varies from 10 hPa to 1 hPa among the four seasons.(3.The position of the Ozone Low in the lower and the upper stratosphere over the Asian continent shows seasonal variability.

关键词： Ozone Low Double core Asian continent Satellite data

Structural insights into the catalytic mechanism of aldehyde-deformylating oxygenases

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Protein & Cell 2015年第1期6卷 55-67页

作者： Cheniun Jia Mei li jianjun li Jingjing Zhang Hongmei Zhang Peng Cao Xiaowei Pan Xuefeng LU Wenrui Chang National Laboratory of Biomacromolecules Institute of Biophysics Chinese Academy of Sciences Beijing 100101 China Key Laboratory ofBiofuels Shandong Provincial Key Laboratory of Energy Genetics Qingdao Instituie of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao 266101 China University of chinese academy of sciences Beijing 100049 China

The fatty alk（a/e）ne biosynthesis pathway found in cyanobacteria gained tremendous attention in recent years as a promising alternative approach for biofuel production. Cyanobacterial aldehyde-deformylating oxygenase （cADO）, which catalyzes the conversion of Cn fatty aldehyde to its corresponding Cn-1 alk（ale）ne, is a key enzyme in that pathway. Due to its low activity, alk（a/e）ne production by cADO is an inefficient process. Previous biochemical and structural investi. gations of cADO have provided some information on its catalytic reaction. However, the details of its cata- lytic processes remain unclear. Here we report five crystal structures of cADO from the Synechococcus elongates strain PCC7942.in both its iron-free and iron-bound forms, representing different states during its catalytic process. Structural comparisons and functional enzyme assays indicate that Giu144, one of the iron-coordinating residues, plays a vital role in the catalytic reaction of cADO. Moreover, the helix where Glu144 resides exhibits two distinct conformations that correlates with the different binding states of the di-iron center in cADO structures. Therefore, our results provide a structural explanation for the highly labile feature of cADO di-iron center, which we pro- posed to be related to its low enzymatic activity. On the basis of our structural and biochemical data, a possible catalytic process of cADO was proposed, which could aid the design of cADO with improved activity.

关键词： aldehyde-deformylating oxygenase di-ironcenter crystal structure catalytic mechanism alk(a/e)neproduction

Adsorption-energy-based activity descriptors for electrocatalysts in energy storage applications

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National Science Review 2018年第3期5卷 327-341页

作者： Youwei Wang Wujie Qiu Erhong Song Feng Gu Zhihui Zheng Xiaolin Zhao Yingqin Zhao jianjun {2. Wenqing Zhang State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Materials Genome institute Shanghai University

Energy storage technologies, such as fuel cells, ammonia production and lithium–air batteries, are important strategies for addressing the global challenge of energy crisis and environmental *** overpotential as a direct criterion, we illustrate in theory and experiment that the adsorption energies of charged species such as li~++e~-and H~++e~-are a central parameter to describe catalytic activities related to electricity-in/electricity-out efficiencies. The essence of catalytic activity is revealed to relate with electronic coupling between catalysts and charged species. Based on adsorption energy, some activity descriptors such as d-band center, e-electron number and charge-transfer capacity are further defined by electronic properties of catalysts that directly affect interaction between catalysts and charged species. The present review is helpful for understanding the catalytic mechanisms of these electrocatalytic reactions and developing accurate catalytic descriptors, which can be employed to screen high-activity catalysts in future high-throughput calculations and experiments.

关键词： activity descriptors electrocatalysts adsorption energy energy storage applications overpotential

Violation of the T^(−1) Relationship in the Lattice Thermal Conductivity of Mg_(3.Sb_(2. with Locally Asymmetric Vibrations

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Research 2020年第1期2020卷 750-759页

作者： Yifan Zhu Yi Xia Yancheng Wang Ye Sheng Jiong Yang Chenguang Fu Airan li Tiejun Zhu Jun Luo Christopher Wolverton GJeffrey Snyder jianjun {2. Wenqing Zhang State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Materials Genome institute Shanghai UniversityShanghai 200444China Department of Materials Science and Engineering Northwestern UniversityIL 60208USA Max Planck institute for Chemical Physics of Solids Dresden 01187Germany State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Department of Physics and Shenzhen institute for Quantum Science&Engineering Southern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Lab for Computational Science and Materials Design and Shenzhen Municipal Key Lab for Advanced Quantum Materials and Devices Southern University of Science and TechnologyShenzhen 518055China

Most crystalline materials follow the guidelines of T^(-1) temperature-dependent lattice thermal conductivity(κ_(L))at elevated ***,we observe a weak temperature dependence ofκL in Mg_(3.Sb_(2.,T^(-0:48) from theory and T-0:57 from measurements,based on a comprehensive study combining ab initio molecular dynamics calculations and experimental measurements on single crystal Mg_(3.Sb_(2..These results can be understood in terms of the so-called“phonon renormalization”effects due to the strong temperature dependence of the interatomic force constants(IFCs).The increasing temperature leads to the frequency upshifting for those low-frequency phonons dominating heat transport,and more importantly,the phononphonon interactions are ***-depth analysis reveals that the phenomenon is closely related to the temperature-induced asymmetric movements of Mg atoms within MgSb_(4) *** increasing temperature,these Mg atoms tend to locate at the areas with relatively low force in the force profile,leading to reduced effective 3.(rd)-order *** locally asymmetrical atomic movements at elevated temperatures can be further treated as an indicator of temperature-induced variations of IFCs and thus relatively strong phonon *** present work sheds light on the fundamental origins of anomalous temperature dependence of κ_(L) in thermoelectrics.

关键词： phonon Conductivity Locally

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基于嫦娥一号观测数据的月球形貌可视化技术

空间科学学报 2011年第1期31卷 100-105页

作者：邹小端刘建军李春来中国科学院国家天文台北京100012 中国科学院研究生院北京100190

通过对月球形貌可视化技术的研究,分析了利用嫦娥一号获取的月球地形和正射影像数据制作月球形貌图的技术方法.重点介绍了广泛应用于嫦娥一号数据处理和分析的晕渲地形图制作、月球地形影像假彩色融合和三维形貌场景构建的原理,并给出... 详细信息

通过对月球形貌可视化技术的研究,分析了利用嫦娥一号获取的月球地形和正射影像数据制作月球形貌图的技术方法.重点介绍了广泛应用于嫦娥一号数据处理和分析的晕渲地形图制作、月球地形影像假彩色融合和三维形貌场景构建的原理,并给出了每种方法的应用实例.这些方法为后续月球探测研究、月球空间信息系统以及"数字月球"的建设奠定了基础.

关键词：可视化月球地形晕渲数据融合三维模型