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新疆库地北喀拉斯坦代里牙一带中元古代石英闪长岩年代学、地球化学特征及地质意义

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新疆地质 2024年第1期42卷 25-32页

作者：白春东张新征李典河北省区域地质调查院河北廊坊065000

在库地北喀拉斯坦代里牙一带构造混杂岩中厘定出中元古代石英闪长岩,对其开展地质学、岩石学、岩石地球化学和同位素年代学研究。石英闪长岩SiO_(2)含量54.55%~55.84%,MgO含量5.42%~5.65%,Ti_(2)O含量1.15%~1.57%,Mg~#为57~58,里特曼指... 详细信息

在库地北喀拉斯坦代里牙一带构造混杂岩中厘定出中元古代石英闪长岩,对其开展地质学、岩石学、岩石地球化学和同位素年代学研究。石英闪长岩SiO_(2)含量54.55%~55.84%,MgO含量5.42%~5.65%,Ti_(2)O含量1.15%~1.57%,Mg~#为57~58,里特曼指数σ为1.57~1.80,属高钾钙碱性系列。稀土元素总量∑REE为150.5×10^(-6)~183.68×10^(-6);(La/Yb)N为1.98~2.27,(La/Sm)N为1.39~2.08,(Gd/Yb)N为1.00~1.01,δEu=1.03~1.11。石英闪长岩锆石U-Pb年龄为(1130.3±5.6)Ma。西昆仑库地北喀拉斯坦代里牙一带石英闪长岩形成时代为中元古代晚期,属赞岐类高镁闪长岩,由地幔橄榄岩与消减洋片反应形成,形成于大陆岛弧环境,是Rodinia超大陆聚合过程洋壳向塔里木板块俯冲消减的地质记录。

关键词：西昆仑南昆仑地块 Rodinia超大陆中元古代石英闪长岩俯冲消减

High-spatial-resolution composition analysis of micro/nanostructures with a nanoscale compositional variation

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Nano Research 2023年第1期16卷 1090-1095页

作者： Meng Wang Xiaofeng Wang Zhican Zhou Feng Xia Haoran zhang Artem Shelaev xinzheng zhang Chuanfei Guo Jingjun Xu Qian Liu Chinese Academy of Sciences(CAS)Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology&University of Chinese Academy of SciencesBeijing 100190China The MOE Key Laboratory of Weak-Light Nonlinear Photonics TEDA Applied Physics SchoolNankai UniversityTianjin 300457China Sino-German College of Intelligent Manufacturing Shenzhen Technology UniversityShenzhen 518118China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China College of Physics Qingdao UniversityQingdao 26607China NT-MDT Co.Building 100 ZelenogradMoscow 124482Russia Institute of Physics Kazan Federal UniversityKazan 420008Russia Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices Southern University of Science and TechnologyShenzhen 518055China College of Material Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China

The composition of materials in a micro-/nano-devices plays a key role in determining their mechanical,physical,and chemical ***,for devices with a compositional change on nanoscale which can often be achieved by point-by-point direct writing technology using a focused ion beam(FIB),electron beam(EB),or laser beam(LB),but so far,nanoscale composition analysis of a large-area micro/nano structures with a variation composition remains a big challenge in cost,simpleness,and *** we present a feasible route to realize large-area composition analysis with nanoscale spatial resolution by using Raman *** experimentally verified the capability of this method by analyzing a complex Sn-SnOx system of a microscale grayscale mask with nanoscale spatial resolution of *** analyses using Auger electron spectroscopy,transmission electron microscopy,and atomic force microscopy indicated the effectiveness and practicality of our *** work opens up a way to analyze the composition of a large-area complex system at a nanoscale spatial resolution,and the method can be extended to many other material systems.

关键词： Raman spectroscopy nanoscale resolution composition analysis large-area

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北京市学分银行建设问题研究

西北成人教育学院学报 2024年第1期 21-27页

作者：张新政黄思源陆珊珊北京市朝阳区职工大学北京朝阳区100013

为了适应我国建设一个面向全民的终身教育体系,加速职业教育国家学分银行建设,北京市经过两年多的实践探索,产生了一些实践案例。本研究对当前北京市政府推进学分银行建设进行梳理和研究,阐述了北京市学分银行建设的现状,通过研究认为... 详细信息

为了适应我国建设一个面向全民的终身教育体系,加速职业教育国家学分银行建设,北京市经过两年多的实践探索,产生了一些实践案例。本研究对当前北京市政府推进学分银行建设进行梳理和研究,阐述了北京市学分银行建设的现状,通过研究认为当前在学分银行建设中,存在法律法规不健全,制度保障不到位,平台建设资金投入不足,认证与转换标准体系建设推进缓慢,公民参与率、知晓率低,学分银行公信力低等六个方面主要问题,提出了加快法律法规体系建设,完善学分银行制度保障体系建设,加大平台投入,建设智能化学分银行应用平台,强化学分银行运行标准化体系建设,加强学分银行知晓度和参与度建设,多维度促进学分银行公信力建设的对策建议。

关键词：学分银行成人教育终身教育北京市

Supramolecular assembly of chloroplast NADH dehydrogenase-like complex with photosystem Ⅰfrom Arabidopsis thaliana

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Molecular Plant 2022年第3期15卷 454-467页

作者： Xiaodong Su Duanfang Cao Xiaowei Pan Lifang Shi Zhenfeng Liu Luca Dall’Osto Roberto Bassi xinzheng zhang Mei Li National Laboratory of Biomacromolecules CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China College of Life Science Capital Normal UniversityBeijing 100101P.R.China Dipartimento di Biotecnologie Universitàdi Verona37134 VeronaItaly Center for Biological Imaging CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101P.R.China

Cyclic electron transport/flow(CET/CEF)in chloroplasts is a regulatory process essential for the optimization of plant photosynthetic efficiency.A crucial CEF pathway is catalyzed by a membrane-embedded NADH dehydrogenase-like(NDH)complex that contains at least 29 protein subunits and associates with photosystem I(PSI)to form the NDH-PSI ***,we report the 3.9Åresolution structure of the Arabidopsis thaliana NDH-PSI(AtNDH-PSI)*** constructed structural models for 26 AtNDH subunits,among which 11 are unique to chloroplasts and stabilize the core part of the NDH *** the supercomplex,one NDH can bind up to two PSI-light-harvesting complex I(PSI-LHCI)complexes at both sides of its membrane *** minor LHCIs,Lhca5 and Lhca6,each present in one PSI-LHCI,interact with NDH and contribute to supercomplex formation and ***,our study reveals the structural details of the AtNDH-PSI supercomplex assembly and provides a molecular basis for further investigation of the regulatory mechanism of CEF in plants.

关键词： cyclic electron transport/flow NADH dehydrogenase-like(NDH)complex photosystem I structure Arabidopsis thaliana

Architecture of severe fever with thrombocytopenia syndromevirus

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Protein & Cell 2023年第12期14卷 914-918页

作者： Zixian Sun Jing Cheng Yuan Bai Lin Cao Daoxin Xie Fei Deng xinzheng zhang Zihe Rao Zhiyong Lou Department of Basic Research Guangzhou LaboratoryGuangzhou 510005China MOE Key Laboratory of Protein Science School of MedicineTsinghua UniversityBeijing 100084China University of Chinese Academy of Sciences Beijing100049China National Laboratory of Biomacromolecules CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101China National Virus Resource Center Wuhan Institute of VirologyChinese Academy of SciencesWuhan 430071China State Key Laboratory of Medicinal Chemical Biology and College of Life Science and Pharmacy Nankai UniversityTianjin 300350China

Dear Editor,Severe fever with thrombocytopenia syndrome(SFTS)is an acute infectious disease caused by severe fever with thrombocytopenia syndrome virus(SFTSV)and is characterized by rapid onset,high mortality and widespread *** fatality rate can be as high as 10%-30%,which is significantly higher than that of the hemorrhagic fever caused by Hantavirus in the same area(Song et al.,2018).However,no effective treatments or vaccines are available yet,and the underlying pathogenic mechanisms of the virus are poorly understood.

关键词： fever mortality

Topologically tuned terahertz confinement in a nonlinear photonic chip

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Light(Science & Applications) 2022年第6期11卷 1296-1303页

作者： Jiayi Wang Shiqi Xia Ride Wang Ruobin Ma Yao Lu xinzheng zhang Daohong Song Qiang Wu Roberto Morandotti Jingjun Xu Zhigang Chen The MOE Key Laboratory of Weak-Light Nonlinear Photonics TEDA Institute of Applied Physics and School of PhysicsNankai UniversityTianjin 300457China Innovation Laboratory of Terahertz Biophysics National Innovation Institute of Defense Technology100071 BeijingChina Collaborative Innovation Center of Extreme Optics Shanxi University030006 TaiyuanShanxiChina INRS-EMT 1650 Blvd.Lionel-BouletVarennesQC J3X 152Canada

Compact terahertz(THz)functional devices are greatly sought after for high-speed wireless communication,biochemical sensing,and non-destructive ***,controlled THz generation,along with transport and detection,has remained a challenge especially for chip-scale devices due to low-coupling efficiency and unavoidable absorption ***,based on the topological protection of electromagnetic waves,we demonstrate nonlinear generation and topologically tuned confinement of THz waves in an engineered lithium niobate chip forming a wedge-shaped Su-Schrieffer-Heeger *** measured band structures provide direct visualization of the THz localization in the momentum space,while robustness of the confined mode against chiral perturbations is also analyzed and compared for both topologically trivial and nontrivial *** topological control of THz waves may bring about new possibilities in the realization of THz integrated circuits,promising for advanced photonic applications.

关键词： nonlinear realization wedge

New CFAR target detector for SAR images based on kernel density estimation and mean square error distance

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Journal of Systems Engineering and Electronics 2012年第1期23卷 40-46页

作者： Yi Cui Jian Yang xinzheng zhang Department of Electronic Engineering Tsinghua University Beijing 100084 P. R. China Beijing Institute of Environmental Features Beijing 100854 R R. China

A new constant false alarm rate （CFAR） target detector for synthetic aperture radar （SAR） images is developed. For each pixel under test, both the local probability density function （PDF） of the pixel and the clutter PDF in the reference window are estimated by the non-parametric density estimation. The target detector is defined as the mean square error （MSE） distance between the two PDFs. The CFAR detection in SAR images having multiplicative noise is achieved by adaptive kernel bandwidth proportional to the clutter level. In addition, for obtaining a threshold with respect to a given probability of false alarm （PFA）, an unsupervised null distribution fitting method with outlier rejection is proposed. The effectiveness of the proposed target detector is demonstrated by the experiment result using the RADATSAT-2 SAR image.

关键词： synthetic aperture radar (SAR) target detection con- stant false alarm rate (CFAR).

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升流式厌氧污泥床处理二甲基甲酰胺废水研究

能源环境保护 2024年第1期38卷 159-166页

作者：张新政邓梓萱张涛胡勇陈荣李玉友李大鹏潘杨孔哲苏州科技大学环境科学与工程学院江苏苏州215009 同济大学环境科学与工程学院上海200092 南京工业大学环境科学与工程学院江苏南京211816 西安建筑科技大学环境与市政工程学院陕西西安710055 日本东北大学工学研究科宫城仙台980-8579

N,N-二甲基甲酰胺(DMF)作为有机溶剂在化工领域得到了广泛的应用。本研究通过对小试升流式厌氧污泥床(UASB)反应器处理高浓度DMF工业废水的实验进行评估。实验中,UASB在有限有机负荷率(OLR)范围1.57~9.59 kg COD/(m^(3)·d)下运行,将水... 详细信息

N,N-二甲基甲酰胺(DMF)作为有机溶剂在化工领域得到了广泛的应用。本研究通过对小试升流式厌氧污泥床(UASB)反应器处理高浓度DMF工业废水的实验进行评估。实验中,UASB在有限有机负荷率(OLR)范围1.57~9.59 kg COD/(m^(3)·d)下运行,将水力停留时间(HRT)由48 h缩短至8 h,去除效率优良,达到95%以上。利用经验方程对DMF废水处理过程的CO_(2)排放量和生物能源产生量进行了估算和评估,相比传统的活性污泥(CAS)工艺,UASB工艺具有明显优势,能够回收能源并减少CO_(2)排放,其正净能量潜力为0.061 kW·h/m^(3),同时还显著减少了6.18 kg/m^(3)的CO_(2)排放量。本研究的结果证明了UASB工艺在处理DMF废水方面的潜力和可行性,并促进了碳中和理念在废水处理中的推广。

关键词：厌氧消化 N N-二甲基甲酰胺 UASB 工业废水生物能源生产

Optimizing weighting functions for cryo-electron microscopy

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Biophysics Reports 2021年第2期7卷 152-158页

作者： Jing Cheng xinzheng zhang National Laboratory of Biomacromolecules CAS Center for Excellence in Biomacromolecules Institute of Biophysics Chinese Academy of Sciences Center for Biological Imaging CAS Center for Excellence in Biomacromolecules Institute of Biophysics Chinese Academy of Sciences University of Chinese Academy of Sciences

The frequency-dependent signal to noise ratio of cryo-electron microscopy data varies dramatically with the frequency and with the type of the data. During different steps of data processing, data with distinct SNR are used for calculations. Thus, specific weighting function based on the particular SNR should be designed to optimize the corresponding calculation. Here, we deduced these weighting functions by maximizing the signal to noise ratio of cross correlated coefficients. Some of our weighting functions for refinement resemble that used in the existing software packages. However, weighting functions we deduced for motion correction, particle picking and the refinement with overlapping densities differ from those employed by existing programs. Our new weighting functions may improve the calculation in these steps.

关键词： Cryo-electron microscopy (Cryo-EM) Cross correlation coefficient (CCC) Weighting function