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STUDY OF THE MICROSTRIP ARRAY

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Journal of Electronics(China) 1984年第3期1卷 142-151页

作者：张云翔 Beijing Institute of Remote Sensing Equipment

The design considerations of the microstrip array,the analytical expressions of the microstripantenna(element),the approximate admittance formula of input admittance,and two designed antennaarrays are *** good results have been obtained from the main performance of the designedantenna arrays,such as sidelobe level,*** polarization level,and gain etc.

关键词： line STUDY OF THE MICROSTRIP ARRAY length VSWR

An Innovative Deep Architecture for Flight Safety Risk Assessment Based on Time Series Data

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Computer Modeling in Engineering & Sciences 2024年第3期138卷 2549-2569页

作者： Hong Sun Fangquan Yang Peiwen zhang Yang Jiao yunxiang Zhao Civil Aviation Flight Technology and Flight Safety Research Base Civil Aviation Flight University of ChinaGuanghan618307China Airport Academy Civil Aviation Flight University of ChinaGuanghan618307China School of Economics and Management Civil Aviation Flight University of ChinaGuanghan618307China China Academy of Civil Aviation Science and Technology Beijing101300China Flight Training Standards Branch Civil Aviation Flight University of ChinaGuanghan618307China

With the development of the integration of aviation safety and artificial intelligence,research on the combination of risk assessment and artificial intelligence is particularly important in the field of risk management,but searching for an efficient and accurate risk assessment algorithm has become a challenge for the civil aviation ***,an improved risk assessment algorithm(PS-AE-LSTM)based on long short-term memory network(LSTM)with autoencoder(AE)is proposed for the various supervised deep learning algorithms in flight safety that cannot adequately address the problem of the quality on risk level ***,based on the normal distribution characteristics of flight data,a probability severity(PS)model is established to enhance the quality of risk assessment ***,autoencoder is introduced to reconstruct the flight parameter data to improve the data ***,utilizing the time-series nature of flight data,a long and short-termmemory network is used to classify the risk level and improve the accuracy of risk ***,a risk assessment experimentwas conducted to analyze a fleet landing phase dataset using the PS-AE-LSTMalgorithm to assess the risk level associated with aircraft hard landing *** results show that the proposed algorithm achieves an accuracy of 86.45%compared with seven baseline models and has excellent risk assessment capability.

关键词： Safety engineering risk assessment time series data autoencoder LSTM

Predictive values of plasma TNFαand IL-8 for intracranial hemorrhage in patients with acute promyelocytic leukemia

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Frontiers of Medicine 2022年第6期16卷 909-918页

作者： Fangyi Dong Li Chen Chaoxian Zhao Xiaoyang Li Yun Tan Huan Song Wen Jin Hongming Zhu yunxiang zhang Kai Xue Junmin Li Kankan Wang Shanghai Institute of Hematology State Key Laboratory of Medical GenomicsNational Research Center for Translational Medicine at ShanghaiRuijin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai200025China CNRS-LIA Hematology and Cancer Sino-French Research Center for Life Sciences and GenomicsRuijin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai200025China

In patients with acute promyelocytic leukemia(APL),intracranial hemorrhage(ICH),if not identified promptly,could be *** is the leading cause of failure of induction and early ***,biomarkers that could promptly predict severe complications are ***,cytokine differences between patients with APL with and without ICH were investigated to develop predictive models for this *** initial cytokine profiling using plasma samples from 39 patients and 18 healthy donors found a series of cytokines that were remarkedly different between patients with APL and healthy *** APL patients were subsequently divided into high and low white blood cell count *** showed that tumor necrosis factor a and interleukin 8(IL-8)were vital in distinguishing patients with APL who did or did not develop *** addition,verification in 81 patients with APL demonstrated that the two cytokines were positively correlated with the cumulative incidence of ***,in-vitro and in-vivo experimental evidence were provided to show that IL-8 influenced the migration of APL-derived NB4 cells and impaired the blood-brain barrier in PML/RARαpositive blast-transplanted FVB/NJ *** assessments may facilitate the early warning of ICH and reduce future mortality levels in APL.

关键词： acute promyelocytic leukemia intracranial hemorrhage cytokines biomarker

New fossils of the Early Pleistocene Equus huanghoensis(Equidae,Perissodactyla)from Nihewan in Hebei Province of China

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Science China Earth Sciences 2016年第10期59卷 83-94页

作者： LI YongXiang zhang yunxiang SUN BoYang AO Hong XUE XiangXu State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an 710069China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710061China Tianjin Museum of Natural History Tianjin 300201China

This paper describes new fossils of Equus huanghoensis from an Early Pleistocene bed in Nihewan, Hebei Province, which confirms the classification of E. huanghoensis by Chinese researchers. The new fossils include a relatively complete male skull and mandible with all upper and lower dentition, a broken female skull with fragment of mandible and a broken Mc III of Equus sp. The fossils were collected from the Yangshuizhan site of Nihewan. The age of the formation is about 1.6 Ma. The new materials verify some classification characteristics based on teeth published in previous descriptions. These characteristics include large teeth size, short protocone, and tilted protoloph and metaloph. We have added to these characteristics of large skull size, a developed protuberantia supramagna, pentagonal nuchal side, weak Pli cabaline, simple enamel plications; a series of new characteristics strikingly different from the other Equus horses. The broken Mc III is similar to Equus qingyangensis from Qingyang, Gansu.

关键词： Nihewan Early Pleistocene Equus huanghoensis New fossils

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聚环氧氯丙烷-二甲胺活性原油油水界面作用机理研究

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当代化工 2024年第7期53卷 1535-1539,1544页

作者：罗振东张志秋陈丹丰李毓于汉森张昀祥回嘉荣郑赛男东北石油大学化学化工学院黑龙江大庆163318 东北石油大学提高采收率重点实验室黑龙江大庆163318 中海油田服务股份有限公司油田生产事业部天津300459

聚环氧氯丙烷-二甲胺活性原油室内堵水实验封堵率可达99%以上,该项技术在辽河油田矿场实验也取得了明显的经济效益,但其作用机理尚不清晰。通过界面膜强度测定以及分子模拟技术对聚环氧氯丙烷-二甲胺对油水界面的稳定作用机理进行了阐... 详细信息

聚环氧氯丙烷-二甲胺活性原油室内堵水实验封堵率可达99%以上,该项技术在辽河油田矿场实验也取得了明显的经济效益,但其作用机理尚不清晰。通过界面膜强度测定以及分子模拟技术对聚环氧氯丙烷-二甲胺对油水界面的稳定作用机理进行了阐述。聚环氧氯丙烷-二甲胺作为阳离子聚合物具有明显增强油水界面膜和降低界面形成能的作用,其稳定油水界面的原因主要有两方面:静电吸附作用,聚环氧氯丙烷-二甲胺与稠油中电负性较高的胶质和沥青质通过静电吸附结合;聚合物分子链的架桥作用,聚环氧氯丙烷-二甲胺的聚合物链通过静电吸附点将胶质、沥青质架桥连接,两种作用机理的结合获得了稳定的油水界面膜,实现了聚环氧氯丙烷-二甲胺活性原油的高效堵水作用。

关键词：聚环氧氯丙烷-二甲胺活性原油分子模拟

CENOZOIC SEDIMENTARY SEQUENCE IN THE KUMUKULI BASIN, XINJIANG AND NEW EVIDENCE ON LATE QUATERNARY UPLIFT OF THE QINGHAI—TIBETAN PLATEAU

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地学前缘 2000年第S1期7卷 213-215页

作者： zhang yunxiang, Che Zicheng, Liu Liang (Department of Geology, Northwest University, Xi’an 710069,China)

The elevation of Qinghai\|Tibetan plateau is a epoch\|making event in the global evolutionary history, which not only constructed the modern magnificent geomorphic feature, but also influenced far\|reachingly the global climate. The evolutionary models of its uplifting time and scope has been primarily set up, and is waiting to be competed with new discovery and supplement. A comprehensive field geologic excursion on the Cenozoic strata of the Kumukuli basin, Xinjiang, northwest Qinghai\|Tibetan plateau by authors has collected a lot of first\|hand data, and the discovery and dating of the late Pleistocene mammal fossils made an important supplement to the scarcity of late Quaternary fossil recorders in many basins, as well as contributed a great deal to the quantitative study of the researches alike, in the main time, provided new evidences to the uplift of Qinghai\|Tibetan plateau since late *** in the northwest part of the Qinghai\|Tibetan plateau, and between the Kunlun and Altum Mountain ranges, Kumukuli basin is a intracontinental plateau basin, with a mean elevation about 4000m. Cenozoic strata have a time span from Oligocene to *** stratigraphic and lithologic association displays that the development of Kumukuli basin started at the Oligocene, at the primary uplift stage of the Qinghai\|Tibetan plateau. The Oligocene and Miocene, with a giant thickness and multiple layers of thick conglomerate, is of the products of stronger erosional stage, and a reflection of higher differential in inner geomorphology of the plateau. The aggradation led to the smoothness of the geomorphic feature and fineness of sedimentary particle since Pliocene. Since then, Large scale conglomerate outcroped in the peripheral of the plateau, and differential of geomorphology in the plateau and its peripheral areas became distinct. Kumukuli basin is one of the synchronously developed basin with the plateau, having the most completed Cenozoic sequence with a thic

关键词： Qinghai\|Tibetan plateau Cenozoic sedimentary sequ ence mammal fossils

Multifunctional MXene/rGO aerogels loaded with Co/MnO nanocomposites for enhanced electromagnetic wave absorption,thermal insulation and pressure sensing

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Nano Research 2024年第9期17卷 7803-7813页

作者： Chan Guo Shiping Shao Xin zhang yunxiang Tang Luxue Wang Jiurong Liu Lili Wu Ke Bi Fenglong Wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong UniversityJinan 250061China State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China

Aerogel-based composites hold promising application prospects as potential electromagnetic wave(EMW)absorption materials,yet the construction of such materials with ingenious microstructures,appropriate magnetic/dielectric multi-components,and integrated multifunctionality remains considerably ***,a multicomponent Co/MnO/Ti_(3)C_(2)T_(x) MXene/rGO(CMMG)hybrid aerogel featured with three-dimensional(3D)vertical directional channel architecture is *** from the synergistic effect arising from the 3D conductive networking structure,diverse heterogeneous interfaces,magnetic/dielectric multicomponent,and multiple loss pathways,the optimized CMMG-2 aerogel delivers fascinating EMW absorption capabilities,characterized by a minimal reflection loss(RL_(min))of-77.41 dB and an effective absorption bandwidth(EAB)of 6.56 ***,the remarkable hydrophobicity,exceptional thermal insulation capabilities,and outstanding photothermal properties of CMMG-2 aerogel make it highly promising for multiple application in diverse and demanding ***,the distinctive pore structure of hybrid aerogel also allows it for sensitive and reliable detection of electrical signals caused by pressure changes and human ***,this research provides a viable design strategy for the development of lightweight,efficient,and multifunctional aerogel-based EMW absorption materials for various application scenarios.

关键词： electromagnetic wave absorption Ti_(3)C_(2)qT_(x)MXene reduced graphene oxide magnetic-dielectric nanoparticles multifunctional aerogel

Carbon nanotube films with ultrahigh thermal-shock and thermalshock-fatigue resistance characterized by ultra-fast ascending shock testing

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Nano Research 2024年第8期17卷 6777-6784页

作者： Mingquan Zhu Shijun Wang yunxiang Bai Feng Gao Zhenxing Zhu Congying Wang Peng zhang Hao Jin Hui zhang Luqi Liu Zhiping Xu Xinghong zhang Fei Wei Zhong zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Department of Engineering Mechanics Tsinghua UniversityBeijing 100084China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150001China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China

The exploration of material failure behavior not only involves defining its limits and underlying mechanisms but also entails devising strategies for improvement and protection in extreme ***'ve pioneered an advanced multi-scale,high-speed ascending thermal shock testing platform capable of inducing unprecedented heat shocks at rates surpassing 105℃/*** meticulous examination of the thermal shock responses of carbon nanotube(CNT)films,we've achieved remarkable *** employing an innovative macro-scale synchronous tightening and relaxing approach,we've attained a critical temperature differential in CNT films that exceeds an exceptional 2500℃—surpassing any previously reported metric for highperformance,thermal-shock-resistant ***,these samples have demonstrated exceptional resilience,retaining virtually unchanged strength even after enduring 10,000 thermal shock cycles at temperatures exceeding 1000℃.Furthermore,our research has revealed a novel thermal shock/fatigue failure mechanism that fundamentally diverges from conventional theories centered on thermal stress.

关键词： carbon nanotubes failure behavior thermal shock characterization

Incorporation of Ag into Cu(In,Ga)Se_(2) films in low-temperature process

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Chinese Optics Letters 2021年第11期19卷 149-154页

作者： Zhaojing Hu yunxiang zhang Shuping Lin Shiqing Cheng Zhichao He Chaojie Wang Zhiqiang Zhou Fangfang Liu Yun Sun Wei Liu Institute of Photoelectronic Thin Film Devices and Technology of Nankai University Key Laboratory of Photoelectronic Thin Film Devices and Technology of TianjinEngineering Research Center of Thin Film Photoelectronic TechnologyMinistry of EducationTianjin 300350China

Chalcopyrite Cu(In,Ga)Se_(2)(CIGS) thin films deposited in a low-temperature process(450℃) usually produce fine grains and poor crystallinity. Herein, different Ag treatment processes, which can decrease the melting temperature and enlarge band gap of the CIGS films, were employed to enhance the quality of thin films in a low-temperature deposition process. It is demonstrated that both the Ag precursor and Ag surface treatment process can heighten the crystallinity of CIGS films and the device efficiency. The former is more obvious than the latter. Furthermore, the Urbach energy is also reduced with Ag doping. This work aims to provide a feasible Ag-doping process for the high-quality CIGS films in a low-temperature process.

关键词： Cu(In,Ga)Se_(2)thin film low-temperature deposition process Ag doping crystallinity Urbach energy