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Optoelectronics Letters 2024年第11期20卷 676-680页

作者： deng zhichao MEI Jianchun WANG Jin YE Qing TIAN Jianguo Key Laboratory of Weak-Light Nonlinear Photonics Ministry of Education School of Physics and TEDA Applied Physics Nankai University

The complex refractive index dispersion(CRID) of absorbing materials is very important in many fields, especially in printing industry and medical research. However, due to their strong absorbing, CRID determination i... 详细信息

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Developing Domestic Offshore Finance to Meet the Needs of the Real Economy

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China Forex 2024年第3期 44-47页

作者： GAO Hao deng zhichao XU Lei Tsinghua University PBC School of Finance Shanghai Academy of Social Sciences

In recent years,there has been a gradual upsurge in the international use of RMB in China's real economy,leading to a growing potential demand for offshore RMB international settlement,deposits and loans,and other financial *** such a background,the development of domestic offshore finance with RMB as the main transaction currency is beneficial to meet these financial needs and promote the high-quality development of the real *** key to developing domestic offshore finance in China is to deeply understand the needs of the real economy,vigorously develop offshore RMB businesses and products,build an offshore RMB financial system,facilitate the global layout of China's real economy,and steadily advance the internationalization of RMB.

关键词： finance offshore loans

高校智库服务决策的模式构建与高质量发展——基于知识生产模式转型的视角

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教育科学 2024年第1期40卷 29-35页

作者：邓志超朱宁波辽宁师范大学教育学部辽宁大连116029

高校智库服务决策本质上是一种知识生产活动。知识生产模式转型背景下,高校智库服务决策的内涵更加丰富,目标情境、参与主体、研究范式、评价方式等不断变化,展现出诸多新特征。本研究通过对高校智库服务决策特征变化的分析,构建了高校... 详细信息

高校智库服务决策本质上是一种知识生产活动。知识生产模式转型背景下,高校智库服务决策的内涵更加丰富,目标情境、参与主体、研究范式、评价方式等不断变化,展现出诸多新特征。本研究通过对高校智库服务决策特征变化的分析,构建了高校智库服务决策的三种模式:学科中心学术情境下“学—政”互动的专家模式、跨学科应用情境下“智—政”互动的平台模式和超学科适应情境下多边互动的开放模式。在这三种模式演进和共生发展情境下,提出高校智库服务决策实现高质量发展的四条进路:树立符合国家需求与公共利益的服务决策理念,创新多边互动的服务决策组织形式,构建多层次的服务决策研究范式,建立开放多元的服务决策评价体系。

关键词：智库高校智库知识生产知识生产模式服务决策

Optimal mining sequence for coal faces under a bedding slope:insight from landslide prevention

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Journal of Mountain Science 2024年第5期21卷 1775-1798页

作者： LI Qingmiao ZHAO Jianjun LI zhichao deng Jie ZUO Jing LAI Qiyi State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China

Repetitive mining beneath bedding slopes is identified as a critical factor in geomorphic disturbances, especially landslides and surface subsidence. Prior research has largely concentrated on surface deformation in plains due to multi-seam coal mining and the instability of natural bedding slopes, yet the cumulative impact of different mining sequences on bedding slopes has been less explored. This study combines drone surveys and geological data to construct a comprehensive three-dimensional model of bedding slopes. Utilizing FLAC3D and PFC2D models, derived from laboratory experiments, it simulates stress, deformation, and failure dynamics of slopes under various mining sequences. Incorporating fractal dimension analysis, the research evaluates the stability of slopes in relation to different mining sequences. The findings reveal that mining in an upslope direction minimizes disruption to overlying strata. Initiating extraction from lower segments increases tensile-shear stress in coal pillar overburdens, resulting in greater creep deformation towards the downslope than when starting from upper segments, potentially leading to localized landslides and widespread creep deformation in mined-out areas. The downslope upward mining sequence exhibits the least fractal dimensions, indicating minimal disturbance to both strata and surface. While all five mining scenarios maintain good slope stability under normal conditions, recalibrated stability assessments based on fractal dimensions suggest that downslope upward mining offers the highest stability under rainfall, contrasting with the lower stability and potential instability risks of upslope downward mining. These insights are pivotal for mining operations and geological hazard mitigation in multi-seam coal exploitation on bedding slopes.

关键词： Bedding rock landslides Mining-induced deformation Bedding slope stability Underground mining sequences Fractal-based strength reduction method

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MRI Artifacts

MRI Artifacts

Analytical modeling and approaches of multihelix cables incorporating with interwire mutual contacts

2009中华医学会影像技术分会第十七次全国学术大会

作者： deng zhichao 卫生部北京医院

MRI Artifacts Artifacts can occur in MRI for a number of reasons,degrading the image quality and sometimes hindering diagnosis. They may be caused by technical problems and data process or by physiological effects fro...

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Applied Mathematics and Mechanics(English Edition) 2024年第9期45卷 1633-1654页

作者： zhichao ZHANG Xingzhe WANG Key Laboratory of Mechanics on Disaster and Environment in Western China The Ministry of Education of ChinaCollege of Civil Engineering and MechanicsKey Laboratory of Special Function Materials and Structure Design of Ministry of EducationLanzhou UniversityLanzhou 730000China College of Civil Science and Engineering Yangzhou UniversityYangzhou 225127Jiangsu ProvinceChina

This study aims to develop an analytical model based on the curve beam theory to capture the mechanical response of a multihelix cable considering the internal contact ***,a double-helix cable subjected to axial tension and torsion is analyzed,and both the line and point contacts between the neighboring wires and strands are considered via an equivalent homogenized ***,the proposed theoretical model is extended to a hierarchical multihelix cable with mutual contact displacements by constructing a recursive relationship between the high-and low-level multihelix *** global tensile stiffness and torsional stiffness of the double-helix cable are successfully *** results are validated by a finite element(FE)model,and are found to be consistent with the findings of previous *** is shown that the contact deformations in multihelix cables significantly affect their equivalent mechanical stiffness,and the contact displacements are remarkably enhanced as the helix angles *** study provides insights into the interwire/interstrand mutual contact effects on global and local responses.

关键词： wordshierarchical multihelix cable mutual contact effect mechanical response effective stiffness

DeepSI:A Sensitive-Driven Testing Samples Generation Method of Whitebox CNN Model for Edge Computing

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Tsinghua Science and Technology 2024年第3期29卷 784-794页

作者： zhichao Lian Fengjun Tian School of Cyber Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China

In recent years,Deep Learning(DL)technique has been widely used in Internet of Things(IoT)and Industrial Internet of Things(IIoT)for edge computing,and achieved good *** more and more studies have shown the vulnerability of neural ***,it is important to test the robustness and vulnerability of neural *** specifically,inspired by layer-wise relevance propagation and neural network verification,we propose a novel measurement of sensitive neurons and important neurons,and propose a novel neuron coverage criterion for robustness *** on the novel criterion,we design a novel testing sample generation method,named DeepSI,which involves definitions of sensitive neurons and important ***,we construct sensitive-decision paths of the neural network through selecting sensitive neurons and important ***,we verify our idea by setting up several experiments,then results show our proposed method achieves superior performances.

关键词： neuron sensitivity Layer-wise Relevance Propagation(LRP) neural network verification deeplearning testing

Developing a fluorescence substrate for HRP-based diagnostic assays with superiorities over the commercial ADHP

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Chinese Chemical Letters 2024年第6期35卷 439-444页

作者： zhichao Zhou Fuqian Chen Xiaotong Xia Dong Ye Rong Zhou Lei Li Tao deng Zhenhua Ding Fang Liu Department of Radiation Medicine Guangdong Provincial Key Laboratory of Tropical Disease ResearchSchool of Public HealthSouthern Medical UniversityGuangzhou 510515China School of Pharmaceutical Sciences Guangzhou University of Chinese MedicineGuangzhou 510006China Artemisinin Research Center Guangzhou University of Chinese MedicineGuangzhou 510006China State Key Laboratory of Respiratory Disease the First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou Medical UniversityGuangzhou 510120China Guangzhou Laboratory Bio-IslandGuangzhou 510030China Nanshan Pharmaceutical Innovation Research Institute of Guangdong Province Foshan 528225China

The combination of horseradish peroxidase(HRP)and a fluorescence substrate has been attracting great interests in developing sensitive biochemical analysis and immunoassays.10-Acetyl-3,7-dihydroxyphenoxazine(ADHP or Amplex red)is the most sensitive fluorogenic substrate known for HRP in current market,however,it suffers from some drawbacks,such as non-specific reactivity to carboxylesterase and limited fluorescence *** the present study,a novel HRP substrate10-cyclopropylcarbonyl-dichloro-dihydroxyphenoxazine(AR-2),has been prepared,which exhibited improved sensitivity than ADHP in sensing ***,the fluorescence of AR-2/HRP demonstrated improved tolerance to physiological relevant p H fluctuation as compared to ADHP/*** detection of uric acid/urate oxidase reaction indicated excellent application prospect of AR-2/HRP for monitoring H_(2)O_(2)-generating biochemical *** interestingly,an enzyme-linked immunosorbent assay(ELISA)using AR-2 as the fluorescence reporter has been successfully used in detecting IgG against severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)from human serum ***,AR-2 exhibits improved performances over the commercial ADHP,which will be an ideal alternative to ADHP in HRP-based fluorescence biochemical analysis and immunoassays.

关键词： Fluorescence immunoassay HRP fluorescence substrate Hydroresorufin Amplex red/ADHP SARS-CoV-2

Regulating Melting Process in the Energy Storage of Solid-Liquid PCM based on Double MRT-LBM Simulation

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Journal of Thermal Science 2024年第5期33卷 1688-1700页

作者： CHEN Weiqi SONG zhichao QUAN Dongliang HE Yurong School of Energy Science&Engineering Harbin Institute of TechnologyHarbin 150001China Heilongjiang Key Laboratory of New Energy Storage Materials and Processes Harbin 150001China Zhengzhou Research Institute of Harbin Institute of Technology Zhengzhou 450000China Innovation&Research Institute of Hiwing Technology Academy Beijing 100074China

The melting process of solid-liquid phase change materials(PCM)has a significant impact on their energy storage *** more effectively apply solid-liquid PCM for energy storage,it is crucial to study the regulation of melting process of solid-liquid PCM,which is numerically investigated based on double multiple relaxation time lattice Boltzmann method(MRT-LBM)in this *** this work we pay more attention to the effects of different Stefan numbers(Ste)and Rayleigh numbers(Ra)on the melting *** results indicate that the PCM melting is greatly influenced by the Ste number and Ra number,which can be divided into the heat conduction dominant stage and the convection dominant stage,according to the onset time of convection Fo_(C).In order to describe the contribution of the heat conduction dominant stage to the whole melting process quantitatively,we firstly propose the ratio of the heat conduction dominant stage R_(pc),which can be defined as the ratio of Fo_(C)to the complete melting time Fo_(M).R_(pc)gradually decreases as the Ra number increases,and when the Ste number rises:R_(pc)=90.0%when Ste=1.0 and Ra=1×10^(5),R_(pc)=39.6%when Ste=0.1 and Ra=1×10^(5),and R_(pc)=14.0%when Ste=1.0 and Ra=1×10~7.A regime map about the effects of different Ste numbers and Ra numbers on R_(pc)has been further *** discovered findings would be helpful in regulating melting process in the energy storage of solid-liquid PCM.

关键词： latent thermal energy storage solid-liquid phase change double MRT-LBM dominant melting mechanism

N-Heterocyclic carbene-catalyzed enantioselective(dynamic) kinetic resolutions and desymmetrizations

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Science China Chemistry 2024年第2期67卷 482-511页

作者： Yi Zhang Hui Cai Xiuhai Gan zhichao Jin National Key Laboratory of Green Pesticide Key Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou UniversityHuaxi DistrictGuiyang550025China

N-heterocyclic carbene-catalyzed enantioselective kinetic resolutions,dynamic kinetic resolutions,and desymmetrization reactions are systematically *** content is organized according to the activation modes involved i... 详细信息

关键词： N-heterocyclic carbene kinetic resolution dynamic kinetic resolution desymmetrization organocatalysis