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A Ray-Testing Approach to Automatically Identify Surface Visibility in Parting Line Generation

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Computer Aided Drafting,Design and Manufacturing 2005年第2期15卷 24-32页

作者： HAN Jian-wen yan Guang-rong LEI yi School of Mechanical Engineering ＆ Automation Beijing University of Aeronautics and Astronautics Beijing 100083 China

It is critical to identify core/cavity and undercut surfaces of molds in parting line generation. A new Ray-Testing approach is presented to detect these surfaces by identifying the visibility of surfaces. A simple, direct and efficient algorithm to identify surface visibility is developed. Case studies show that the approach is practical and valuable in automated parting line generation.

关键词： visibility ray-testing surface classification parting line

Customized Development of CAXASolid

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Computer Aided Drafting,Design and Manufacturing 2006年第2期16卷 30-37页

作者： YU Si-jia yan Guang-rong LEI yi Huazheng Software Institute Beijing University of Aeronautics and Astronautics Beijing 100083 China

CAXASolid, a 3D CAD innovation platform with open structure, provides users with kinds of customized development strategies at different levels. The whole theoretical framework of CAXASolid is introduced. Users can customize their system through application integration, data integration, integration by DLL or integration by COM. Focusing on the customization techniques with COM components, the development method and process are illustrated with some case studies.

关键词： 3D CAD CAXASolid customized development IronCAD Application Programming Interface (ICAPI)

High-throughput screening of CO_(2) cycloaddition MOF catalyst with an explainable machine learning model

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Green Energy & Environment 2025年第1期10卷 132-138页

作者： Xuefeng Bai yi Li Yabo Xie Qiancheng Chen Xin Zhang Jian-rong Li Beijing Key Laboratory for Green Catalysis and Separation and Department of Chemical Engineering College of Materials Science&EngineeringBeijing University of TechnologyBeijing100124China

The high porosity and tunable chemical functionality of metal-organic frameworks(MOFs)make it a promising catalyst design ***-throughput screening of catalytic performance is feasible since the large MOF structure database is *** this study,we report a machine learning model for high-throughput screening of MOF catalysts for the CO_(2) cycloaddition *** descriptors for model training were judiciously chosen according to the reaction mechanism,which leads to high accuracy up to 97%for the 75%quantile of the training set as the classification *** feature contribution was further evaluated with SHAP and PDP analysis to provide a certain physical understanding.12,415 hypothetical MOF structures and 100 reported MOFs were evaluated under 100℃ and 1 bar within one day using the model,and 239 potentially efficient catalysts were *** them,MOF-76(Y)achieved the top performance experimentally among reported MOFs,in good agreement with the prediction.

关键词： Metal-organic frameworks High-throughput screening Machine learning Explainable model CO_(2)cycloaddition

西部地区外国直接投资与经济增长关系的实证分析

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当代经济科学 2007年第2期29卷 111-114页

作者：闫奕荣李志军西安交通大学经济与金融学院陕西西安710061

本文运用协整和因果关系检验理论,对西部地区从1979年到2005年的外国直接投资与经济增长数据进行实证检验。结果发现二者之间存在长期稳定的关系,并且当滞后两期时,经济增长是外国直接投资的格兰杰原因,而外国直接投资并不是经济增长的... 详细信息

本文运用协整和因果关系检验理论,对西部地区从1979年到2005年的外国直接投资与经济增长数据进行实证检验。结果发现二者之间存在长期稳定的关系,并且当滞后两期时,经济增长是外国直接投资的格兰杰原因,而外国直接投资并不是经济增长的格兰杰原因。在协整分析的基础上建立了误差修正模型,分别从长期和短期对两者之间的关系进行了定量分析,并给出了结论和政策建议。

关键词：西部地区外国直接投资经济增长协整和因果关系

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陕西省高新技术产品出口状况分析

国际贸易问题 2006年第6期 67-72页

作者：王增涛阎奕荣西安交通大学经济与金融学院

本文就高新技术产品出口对陕西经济的贡献程度进行了测量,结果发现陕西高新技术产品出口严重滞后。在对陕西高新技术产品出口影响因素全方位分析的基础上,认为出口结构和贸易方式不合理、科技成果转化率偏低是造成陕西高新技术产品出口... 详细信息

本文就高新技术产品出口对陕西经济的贡献程度进行了测量,结果发现陕西高新技术产品出口严重滞后。在对陕西高新技术产品出口影响因素全方位分析的基础上,认为出口结构和贸易方式不合理、科技成果转化率偏低是造成陕西高新技术产品出口滞后的根本原因。最后提出了以出口总量增长、贸易方式优化和出口结构合理化为目标,促进陕西高新技术产品出口发展的政策建议。

关键词：陕西高新技术产品出口

西部地区对外贸易与经济增长的协整及因果关系检验

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西北大学学报（哲学社会科学版） 2007年第3期37卷 38-41页

作者：闫奕荣王满仓李志军西安交通大学经济与金融学院陕西西安710061 西北大学经济管理学院陕西西安710069

运用协整和因果关系检验理论,对西部地区从1978年到2004年的对外贸易与经济增长数据进行实证检验。结果发现二者之间存在长期稳定的关系,但并不存在明显的互为因果关系。在协整分析的基础上建立了误差修正模型,分别从长期和短期对两者... 详细信息

运用协整和因果关系检验理论,对西部地区从1978年到2004年的对外贸易与经济增长数据进行实证检验。结果发现二者之间存在长期稳定的关系,但并不存在明显的互为因果关系。在协整分析的基础上建立了误差修正模型,分别从长期和短期对两者之间的关系进行了定量分析,继而提出了通过改善市场环境、完善出口制度等,加大对外贸易在西部经济总量中的份额等政策建议。

关键词：西部地区对外贸易经济增长协整和因果关系

Repetitive transcranial magnetic stimulation in Alzheimer’s disease:effects on neural and synaptic rehabilitation

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Neural Regeneration Research 2025年第2期20卷 326-342页

作者： yi Ji Chaoyi yang Xuerui Pang yibing yan Yue Wu Zhi Geng Wenjie Hu Panpan Hu Xingqi Wu Kai Wang Department of Neurology The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui ProvinceChina Anhui Province Key Laboratory of Cognition and Neuropsychiatric Disorders HefeiAnhui ProvinceChina Collaborative Innovation Center of Neuropsychiatric Disorders and Mental Health HefeiAnhui ProvinceChina Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefeiAnhui ProvinceChina Department of Psychology and Sleep Medicine The Second Affiliated Hospital of Anhui Medical UniversityHefeiAnhui ProvinceChina

Alzheimer’s disease is a neurodegenerative disease resulting from deficits in synaptic transmission and *** Alzheimer’s disease brain tends to be hyperexcitable and hypersynchronized,thereby causing neurodegeneration and ultimately disrupting the operational abilities in daily life,leaving patients *** transcranial magnetic stimulation is a cost-effective,neuro-modulatory technique used for multiple neurological *** the past two decades,it has been widely used to predict cognitive decline;identify pathophysiological markers;promote neuroplasticity;and assess brain excitability,plasticity,and *** has also been applied to patients with dementia,because it can yield facilitatory effects on cognition and promote brain recovery after a neurological ***,its therapeutic effectiveness at the molecular and synaptic levels has not been elucidated because of a limited number of *** study aimed to characterize the neurobiological changes following repetitive transcranial magnetic stimulation treatment,evaluate its effects on synaptic plasticity,and identify the associated *** review essentially focuses on changes in the pathology,amyloidogenesis,and clearance pathways,given that amyloid deposition is a major hypothesis in the pathogenesis of Alzheimer’s *** mechanisms associated with repetitive transcranial magnetic stimulation procedures and different pathways mediating gene transcription,which are closely related to the neural regeneration process,are also ***,we discuss the outcomes of animal studies in which neuroplasticity is modulated and assessed at the structural and functional levels by using repetitive transcranial magnetic stimulation,with the aim to highlight future directions for better clinical translations.

关键词： Alzheimer’s disease amyloid deposition apoptotic mechanisms biomarker neural regeneration neurodegeneration repetitive transcranial magnetic stimulation synaptic plasticity

MoS2 synaptic transistor with one-step manufacture

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Science China(Information Sciences) 2025年第1期68卷 357-365页

作者： yihao GUO yang WANG Wenjie DENG yi WU Jingtao LI Kexin LI Yuehui ZHAO Songlin YU Xiaoting WANG Yongzhe ZHANG Hui yan Key Laboratory of Optoelectronics Technology of Education Ministry of China Faculty of Information TechnologyBeijing University of Technology Key Laboratory of Advanced Functional Materials Ministry of Education Faculty of Materials and ManufacturingBeijing University of Technology The 11th Research Institute of Electronics Technology Group Corporation

The synaptic transistor,which is a neuromorphic device with brain-like functions,has garnered significant attention due to characteristics such as low energy consumption,high integration,multiple functions,and high computational ***,the current synaptic transistor possesses a complicated structure and involves complex manufacturing steps,which is not conducive to low-cost,large-scale bionic ***,we introduce a simple MoS2synaptic transistor exhibiting robust synaptic *** transistor utilizes magnetron sputtering manufacture to combine the process of device metal electrode deposition and the introduction of defect states,which helps streamline the manufacturing process into a single *** long-term potentiation and long-term depression in photoelectric coordination are initially ***,biological functions,such as double pulse facilitation and the transformation behavior of short-term memory to long-term memory,are thoroughly evaluated,along with learning-forgetting-relearning ***,the device exhibits robust synaptic plasticity until incident light angles down to 30° to imitate the multi-to-one axon-cellular ***,a classical simulation of Pavlov's dog conditioned reflex is demonstrated along with the multiview extraction *** experimental results demonstrate a promising synaptic transistor with a simple structure,manufacturing technique,and excellent *** further indicates the potential for large-scale integration of bionic neuromorphic systems.

关键词： process optimization artificial synaptic device one-stepmanufacture synaptic plasticity bionic simulation

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Spatiotemporal evolution of Ediacaran-Cambrian(ca. 551–523 Ma)sponges in South China and their simulated contributions to marine oxygenation

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Science China Earth Sciences 2025年

作者： yan YE Lei ZHANG Can CHEN Shan CHANG Yuhao yi Qinglai FENG State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences(Wuhan) School of Earth Science China University of Geosciences(Wuhan) Department of Geology Lund University Institute of Sedimentary Geology Chengdu University of Technology Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resources Chengdu University of Technology Second Geological Brigade of Hubei Geological Bureau College of Urban and Environmental Sciences Hubei Normal University Exploration and Development Research Institute SINOPEC Jianghan Oilfield Company

The origin and evolution of sponges have attracted interest, not only because they are among the most basal metazoans, but also because they act as important ecological engineers in the ocean. Previous research suggested that sponge groups diversified quickly during the Cambrian Series 2, while Terreneuvian sponge fossils are conspicuously rare and poorly substantiated. Yet, an increasing number of sponge spicules have been reported from the Ediacaran-Cambrian(E-C, ca.551–523 Ma) transitional carbonates/cherts worldwide, particularly in South China, which calls for updated discussions. Ocean oxygenation has been widely proposed to play a critical role in organismal evolution, but its relationship with sponges is unclear and falls into a “chicken-egg” dilemma. In this study, we summarize reported sponge spicule distributions from five E-C sections in South China to investigate the early evolutionary pattern of siliceous sponges. According to current stratigraphic correlation,monaxons first appear in the late Ediacaran in the intrashelf basin-slope area, and then potentially expand to the continental shelf and deep basin in the lower Cambrian. In these sections, the abundance, size, and diversity of monaxons increase upwards,followed by the appearance of diaxons, triaxons and then polyactines. Despite the uncertain affinity of the sponge fossils, it is possible that siliceous hexactinellids evolved later than siliceous demosponges, given that the earliest spicule assemblages are exclusively composed of monaxons, which commonly form bundles comparable to modern demosponges. New geochemical data from the Sifangjing section, Guizhou Province and the yanziqiao section, Hunan Province, South China show that the appearance of sponges usually corresponds to anoxic environment. In addition, we applied the recently proposed Biological Pump, Oxygen and Phosphorus(BPOP) model to trace the evolution of oceanic oxygen concentrations with the radiation of sponges. The results indic

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