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FRONTIERS OF MEDICINE 2024年第4期18卷 757-761页

作者： Wang, Juan Shi, Dongni Wang, Yaochen zhang, xuanqi Li, Han Wang, Xihong Luo, Shufeng Hu, Lihan Deng, Jiashuai zhang, Lin Lau, Chung Tai Cheng, Chung Wah Han, Fei Li, Ji Wang, Ping Lyu, Aiping Bian, Zhaoxiang zhang, Xuan Hong Kong Baptist Univ Inst Res & Continuing Educ Shenzhen 518057 Peoples R China Hong Kong Baptist Univ Chinese EQUATOR Ctr Hksar 999077 Peoples R China Hong Kong Baptist Univ Sch Chinese Med Hksar 999077 Peoples R China Hong Kong Baptist Univ Ctr Chinese Herbal Med Drug Dev Hksar 999077 Peoples R China Tianjin Univ Tradit Chinese Med Sch Tradit Chinese Med Tianjin 301617 Peoples R China Beijing Univ Chinese Med Sch Chinese Med Beijing 100105 Peoples R China China Acad Chinese Med Sci Guanganmen Hosp Dept Pediat Beijing 100053 Peoples R China China Acad Chinese Med Sci Xiyuan Hosp Beijing 100091 Peoples R China

Transparency and reporting characteristics of randomized controlled trials with Chinese herbal medicine formulas interventions

关键词： Transparency reporting characteristics trials herbal medicine

Customization of FeNi alloy nanosheet arrays inserted with biomass-derived carbon templates for boosted electromagnetic wave absorption

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 812-824页

作者： xuanqi Yang Honghan Wang Jing Chen Qingda An Zuoyi Xiao Jingai Hao Shangru Zhai Junye Sheng Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefineryCollege of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034China Qingdao Medical College Qingdao UniversityQingdao 266071China

Electromagnetic wave(EMW)-absorbing materials have considerable capacity in the military field and the prevention of EMW radiation from harming human ***,obtaining lightweight,high-performance,and broadband EMW-absorbing material remains an overwhelming *** dielectric/magnetic composites with customized structures is a strategy with great promise for the development of high-performance EMW-absorbing *** layered double hydroxides as the precursors of bimetallic alloys and combining them with porous biomass-derived carbon materials is a potential way for constructing multi-interface heterostructures as efficient EMW-absorbing materials because they have synergistic losses,low costs,abundant resources,and light ***,FeNi alloy nanosheet array/Lycopodium spore-derived carbon(FeNi/LSC)was prepared through a simple hydrothermal and carbonization ***/LSC presents ideal EMW-absorbing performance by benefiting from the FeNi alloy nanosheet array,sponge-like structure,capability for impedance matching,and improved dielectric/magnetic *** expected,FeNi/LSC exhibited the minimum reflection loss of-58.3 dB at 1.5 mm with 20wt%filler content and a widely effective absorption bandwidth of 4.92 ***/LSC composites with effective EMW-absorbing performance provide new insights into the customization of biomass-derived composites as high-performance and lightweight broadband EMW-absorbing materials.

关键词： spore-derived carbon FeNi alloy nanosheet array multi-interface heterostructures synergistic effect efficient electromagnet-ic wave absorption

机构投资者的羊群行为与市场影响——基于CSAD方法的实证研究

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南方金融 2014年第2期 65-70,64页

作者：张轩旗北京大学光华管理学院北京150010

从单个基金与市场偏离程度的角度,本文考察了2002-2013年机构投资者的羊群行为及其对股票市场的影响。研究结果表明,无论是基金整体还是分类基金,这一时期内机构投资者均不存在显著的羊群行为,然而机构投资者的介入也不能对资本市场稳... 详细信息

从单个基金与市场偏离程度的角度,本文考察了2002-2013年机构投资者的羊群行为及其对股票市场的影响。研究结果表明,无论是基金整体还是分类基金,这一时期内机构投资者均不存在显著的羊群行为,然而机构投资者的介入也不能对资本市场稳定产生积极作用。

关键词：资本市场机构投资者羊群行为

Progress in Mechanical Modeling of Implantable Flexible Neural Probes

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Computer Modeling in Engineering & Sciences 2024年第8期140卷 1205-1231页

作者： Xiaoli You Ruiyu Bai Kai Xue Zimo zhang Minghao Wang xuanqi Wang Jiahao Wang Jinku Guo Qiang Shen Honglong Chang Xu Long Bowen Ji Unmanned System Research Institute Northwestern Polytechnical UniversityXi’an710072China National Key Laboratory of Unmanned Aerial Vehicle Technology Northwestern Polytechnical UniversityXi’an710072China Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace School of Mechanical EngineeringNorthwestern Polytechnical UniversityXi’an710072China School of Automobile Chang’an UniversityXi’an710018China MOE Engineering Research Center of Smart Microsensors and Microsystems College of Electronics and InformationHangzhou Dianzi UniversityHangzhou310018China School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an710129China

Implanted neural probes can detect weak discharges of neurons in the brain by piercing soft brain tissue,thus as important tools for brain science research,as well as diagnosis and treatment of brain ***,the rigid neural probes,such as Utah arrays,Michigan probes,and metal microfilament electrodes,are mechanically unmatched with brain tissue and are prone to rejection and glial scarring after implantation,which leads to a significant degradation in the signal quality with the implantation *** recent years,flexible neural electrodes are rapidly developed with less damage to biological tissues,excellent biocompatibility,and mechanical compliance to alleviate *** them,the mechanical modeling is important for the optimization of the structure and the implantation *** this review,the theoretical calculation of the flexible neural probes is firstly summarized with the processes of buckling,insertion,and relative interaction with soft brain tissue for flexible probes from outside to ***,the corresponding mechanical simulation methods are organized considering multiple impact factors to realize minimally invasive ***,the technical difficulties and future trends of mechanical modeling are discussed for the next-generation flexible neural probes,which is critical to realize low-invasiveness and long-term coexistence in vivo.

关键词： Mechanical modeling flexible neural probes invasive theoretical calculation simulation

Disease Burden and Costs Associated with Multiple Sclerosis in China:A Cross-sectional Analysis of Nationwide Survey Data

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Neuroscience Bulletin 2024年第4期40卷 533-538页

作者： Yusheng Jia xuanqi Qiao Jin Zhao Hainan Li Shanlian Hu Min Hu Department of Health Economics School of Public HealthFudan UniversityShanghai200032China National Health Commission Key Laboratory of Health Technology Assessment Fudan UniversityShanghai200032China

DearEditors,Multiple sclerosis(MS)is a chronic,autoimmune neurological disorder characterized by inflammatory demyelination of the central nervous system;it is associated with reduced mobility,cognitive impairment,and numerous comorbidities[1].Global MS incidence(2.1 per 100,000 person-years)and prevalence(30.1 per 100,000)have increased in recent years,and its prevalence is notably higher in Western countries,ranging from~30 to 200 cases per 100,000[2].In China,recent epidemiological research has shown that the crude prevalence was 2.44 per 100,000 in 2016[3],and the age-and sex-adjusted incidence was 0.235 per 100,000 person-years[4].Despite the relatively low prevalence compared with the global average,China has extensively addressed the well-being of over 30,000 MS patients,enrolling MS in China's First National List of Rare Diseases in 2018.

关键词： prevalence impairment autoimmune

Fairness in machine learning: definition, testing,debugging, and application

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Science China(Information Sciences) 2024年第09期67卷 41-61页

作者： xuanqi GAO Chao SHEN Weipeng JIANG Chenhao LIN Qian LI Qian WANG Qi LI Xiaohong GUAN Faculty of Electronic and Information Engineering Xi'an Jiaotong University School of Cyber Science and Engineering Wuhan University Institute for Network Sciences and Cyberspace Tsinghua University

In recent years, artificial intelligence technology has been widely used in many fields, such as computer vision, natural language processing and autonomous driving. Machine learning algorithms, as the core technique of AI, have significantly facilitated people's lives. However, underlying fairness issues in machine learning systems can pose risks to individual fairness and social security. Studying fairness definitions, sources of problems, and testing and debugging methods of fairness can help ensure the fairness of machine learning systems and promote the wide application of artificial intelligence technology in various fields. This paper introduces relevant definitions of machine learning fairness and analyzes the sources of fairness problems. Besides, it provides guidance on fairness testing and debugging methods and summarizes popular datasets. This paper also discusses the technical advancements in machine learning fairness and highlights future challenges in this area.

关键词： artificial intelligence security machine learning security machine learning fairness model testing model debugging

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油水相对渗透率曲线的实验测定

石油钻采工艺 1994年第5期16卷 87-90页

作者：张玄奇西安石油学院

油水相对渗透率曲线是编制油田开发方案及油藏动态预测的重要实验资料和依据。本文探讨了各种岩性的岩心及不同性质的流体室内测定油水相对渗透率曲线的最合理的方法，得到了一些很有意义的结论。

关键词：渗透率饱和度测定油层水

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冷伤害对气井增产措施的影响研究

天然气工业 2004年第10期24卷 54-55页

作者：张玄奇尉立岗西安石油大学

文章着重研究了由于施工液体的温度过低而引起的地层冷伤害对气井增产措施的影响。实验选用了鄂尔多斯盆地的气藏岩心,在恒压和45℃、30℃、25℃、15℃、5℃下进行了水测渗透率实验,发现随着温度的降低,岩心的渗透率也随之降低;岩心的... 详细信息

文章着重研究了由于施工液体的温度过低而引起的地层冷伤害对气井增产措施的影响。实验选用了鄂尔多斯盆地的气藏岩心,在恒压和45℃、30℃、25℃、15℃、5℃下进行了水测渗透率实验,发现随着温度的降低,岩心的渗透率也随之降低;岩心的原始渗透率越低,其降低程度越大,尤其是在5℃左右,渗透率降低到最低。当温度由5℃恢复至45℃时,岩心的渗透率不能恢复至原来的值。由此可见,当气层受到冷伤害后其伤害程度有部分是不可逆的,气层不能恢复至原始状态。在同样的实验条件下,进行了压裂液的返排实验。在低温状态下,压裂液的返排效果很差。由此推断在低温状态下,由于突然的冷刺激导致岩心的孔隙结构发生变化,原来张开的微裂缝闭合,使其渗透率大幅度降低;加之低温条件下压裂液的破胶能力差,导致其返排能力变差。两者共同作用的结果必然会导致增产措施失败或不能发挥其作用效果。该结果对冬季施工提供了极其有益的资料。

关键词：渗透率返排气井岩心压裂液增产措施气层鄂尔多斯盆地地层气藏

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基于改进CatBoost的入侵检测研究

数据通信 2022年第6期 28-32页

作者：张宣琦缪祥华昆明理工大学信息工程与自动化学院云南昆明650500 云南省计算机技术应用重点实验室云南昆明650500

针对当前传统的网络入侵检测系统存在由于数据不平衡、特征冗余而导致检测准确率低的问题,设计了一种基于改进CatBoost(Categorical Boosting)的网络入侵检测模型。该模型主要有特征选择和分类器两个模块,其步骤为首先去除数据集中无效... 详细信息

针对当前传统的网络入侵检测系统存在由于数据不平衡、特征冗余而导致检测准确率低的问题,设计了一种基于改进CatBoost(Categorical Boosting)的网络入侵检测模型。该模型主要有特征选择和分类器两个模块,其步骤为首先去除数据集中无效的特征;接着进行特征提取,其实现过程融合了CatBoost特征重要性评估方法,以此减少模型训练和检测时间;最后在经过特征选择的训练集上利用引入Focal loss作为损失函数的CatBoost进行模型训练分类。UNSW-NB15数据集上的结果表明,本文提出的入侵检测模型在验证阶段检测准确率为92.51%,且误报率为5.42%。与传统模型相比更准确,误报率更低。

关键词：入侵检测特征选择数据不平衡 CatBoost算法 Focal loss损失函数

浅析沿海滩涂区域风电项目进度管理——华能启东风电场一期工程进度管理

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资源环境与工程 2014年第4期28卷 607-609页

作者：郑杰张选歧上海勘测设计研究院上海200434

在华能启东风电场一期工程建设中,通过对项目管理工作进行持续分解和目标细化,实现进度计划的科学、合理优化;采取可实现、有激励的方式,充分调动各参建单位的积极性,创造了100 MW级大型风电项目九个月首批机组并网、十个月全部机组并... 详细信息

在华能启东风电场一期工程建设中,通过对项目管理工作进行持续分解和目标细化,实现进度计划的科学、合理优化;采取可实现、有激励的方式,充分调动各参建单位的积极性,创造了100 MW级大型风电项目九个月首批机组并网、十个月全部机组并网发电的新纪录,较好地实现了工程建设进度、质量、费用、安全等总体目标最优。

关键词：风电项目进度管理沿海滩涂区域