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Brain region-specific roles of brain-derived neurotrophic factor in social stress-induced depressive-like behavior

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Neural Regeneration Research 2025年第1期20卷 159-173页

作者： Man han Deyang Zeng Wei Tan Xingxing Chen Shuyuan Bai Qiong Wu Yushan Chen Zhen Wei Yufei mei Yan Zeng Brain Science and Advanced Technology Institute Wuhan University of Science and TechnologyWuhanHubei ProvinceChina Geriatric Hospital Affiliated to Wuhan University of Science and Technology WuhanHubei ProvinceChina School of Public Health Wuhan University of Science and TechnologyWuhanHubei ProvinceChina

Brain-derived neurotrophic factor is a key factor in stress adaptation and avoidance of a social stress behavioral *** studies have shown that brain-derived neurotrophic factor expression in stressed mice is brain region–specific,particularly involving the corticolimbic system,including the ventral tegmental area,nucleus accumbens,prefrontal cortex,amygdala,and *** how brain-derived neurotrophic factor participates in stress processing in different brain regions will deepen our understanding of social stress *** this review,we discuss the expression and regulation of brain-derived neurotrophic factor in stress-sensitive brain regions closely related to the pathophysiology of *** focused on associated molecular pathways and neural circuits,with special attention to the brain-derived neurotrophic factor–tropomyosin receptor kinase B signaling pathway and the ventral tegmental area–nucleus accumbens dopamine *** determined that stress-induced alterations in brain-derived neurotrophic factor levels are likely related to the nature,severity,and duration of stress,especially in the above-mentioned brain regions of the corticolimbic ***,BDNF might be a biological indicator regulating stress-related processes in various brain regions.

关键词： amygdala chronic mild stress chronic social defeat stress corticolimbic system depression hippocampus medial prefrontal cortex nucleus accumbens social stress models ventral tegmental area

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Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： mei Zhang Wenhao Li Yangfei Chen Yang Jiang Xiaofei Guo han Dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

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Modeling and control of a rigid-flexible coupling robot for narrow space manipulations

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Science China Technological Sciences 2025年

作者： Kuangda CHEN Huan ZHAO Jiexin ZhanG mei FEng Yiwei WAng Jinliang WAng han DIng State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and Technology Key Laboratory of CNC Equipment Reliability Ministry of Education Jilin University School of Medical Equipment Science and Engineering Huazhong University of Science and Technology

Narrow space manipulations are crucial for equipment maintenance, as they eliminate the need for disassembly, thus reducing costs and increasing efficiency. Cable-driven flexible robots possess exceptional capabilities in maneuvering through narrow spaces, thanks to their interaction compliance and distal dexterity. However, their inherent low stiffness causes a decline in the location accuracy of the robot and could even lead to manipulation failure. To address this challenge, this paper proposes a novel type of rigid-flexible coupling robot, which increases the stiffness of the robot while ensuring the reachability within a narrow space. To achieve high-accuracy location in a narrow space, kinematic and control methods are proposed. Specifically,the robot forward kinematics are uniformly represented, and the closed-form inverse kinematics solution is derived. Furthermore, in cases where the robot?s structure fails to align with Pieper?s solution, a two-stage search strategy is utilized to solve the inverse kinematics, resulting in a high success rate of 99.1%. Based on the proposed kinematics, a rigid-dominated control method is then proposed to facilitate localization and pose alignment of target objects in narrow spaces. The practical comparative experiments show that the proposed robot has the capability of high accuracy control in narrow spaces.

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师范生职业使命感对学习投入的影响研究——基于有调节的中介效应分析

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东北师大学报（哲学社会科学版） 2025年第1期 71-80页

作者：梁红梅王梦寒东北师范大学教育学部吉林长春130024

本研究以自我决定理论与职业生涯建构理论为基础,以80536名师范生群体为研究对象,采用职业认同量表、职业目标量表、学习投入量表以及职业使命感量表,探讨师范生职业使命感与其学习投入之间的关系。结果表明:在控制性别、年级、学校类... 详细信息

本研究以自我决定理论与职业生涯建构理论为基础,以80536名师范生群体为研究对象,采用职业认同量表、职业目标量表、学习投入量表以及职业使命感量表,探讨师范生职业使命感与其学习投入之间的关系。结果表明:在控制性别、年级、学校类型以及身份的基础上,师范生职业使命感对学习投入具有显著正向影响;职业认同在职业使命感与学习投入之间起到部分中介作用;职业目标调节了职业使命感通过职业认同影响师范生学习投入的中介过程的前半段路径,并且在职业使命感与学习投入之间也起到调节作用。研究结果揭示了在师范生群体之中,职业目标、职业认同、职业使命感与学习投入四个变量之间的作用机理,为增强师范生对于教师身份的认同感,提升其职业使命感以及在校期间的学习投入奠定基础,也为高校培养师范生人才、创建高素质教师队伍提供参考依据。

关键词：师范生职业使命感学习投入职业认同职业目标

Unveiling the role of Zn dopants in NiFe phosphide nanosheet for oxygen evolution reaction

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Progress in Natural Science:Materials International 2023年第1期33卷 74-82页

作者： Chendong Kou Jingrui han Haibin Wang mei han Hongyan Liang School of Materials Science and Engineering Tianjin University Key Laboratory of Efficient Utilization of Low and Medium Grade Energy Tianjin University

Transition metal phosphides have been recognized as promising electrocatalysts for oxygen evolution reaction(OER) due to their low cost and high activity. However, the insufficient exposed active region limited the OER performance. Recently, the introduction of sacrificial dopants has been considered an effective strategy to enlarge the surface area. Herein, the Zn dopants are introduced in NiFe phosphide(NiFeZnP) nanosheet, which work as the sacrificial dopants to generate more exposed active NiFe sites and promote the formation of the NiFeOOH active phase during OER process. The optimized Zn-doped NiFeP catalyst shows an overpotential of ≈203 mV to reach a current density of 10 mA cm-2in 1 M KOH, and a stability of 100 h at 1000 mA cm-2. Overall, this work provides a sacrificial Zn doping strategy to prepare highly efficient OER electrocatalysts.

关键词： Transition metal phosphide Sacrificial dopant Self-supported electrode Oxygen evolution reaction

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Tor被动流量分析综述

软件学报 2025年第1期36卷 253-288页

作者：梅汉涛程光朱怡霖周余阳东南大学网络空间安全学院江苏省泛在网络安全工程研究中心(东南大学) 网络空间国际治理研究基地(东南大学) 紫金山实验室

随着网络的蓬勃发展,用户隐私正面临着前所未有的挑战.人们开发出多种匿名通信系统来保护隐私,第2代洋葱路由Tor (the second-generation onion router)是目前最为广泛使用的匿名通信系统.然而,卓越的匿名性也使之成为不法分子犯罪的温... 详细信息

随着网络的蓬勃发展,用户隐私正面临着前所未有的挑战.人们开发出多种匿名通信系统来保护隐私,第2代洋葱路由Tor (the second-generation onion router)是目前最为广泛使用的匿名通信系统.然而,卓越的匿名性也使之成为不法分子犯罪的温床,如今Tor中充斥着非法交易、网络犯罪等. Tor被动流量分析通过被动观察网络流量对Tor进行去匿名化,已成为最热门的去匿名化技术.从Tor与流量分析基本概念出发,介绍Tor被动流量分析技术的应用场景与威胁模型.按照技术类型将现有工作分为流量分类技术与流关联技术,依据分析流程分别对比其流量采集方法、特征提取方法、使用算法.最后探讨当前研究面临的主要挑战与未来可能的研究趋势.

关键词： Tor 流量分析流量分类网站指纹流关联

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基于跨域MPLS的虚拟私有网络优化研究

天津理工大学学报 2025年第2期41卷 113-119页

作者：钟兴宇韩梅孙昊天津理工大学聋人工学院南开大学人工智能学院

现有3种基于多协议标签交换(multi-protocol label switching, MPLS)的跨域虚拟私有网络(virtual private network, VPN)方案都存在着设备负载过重、可扩展性不强，以及维护成本较高等问题。为此，提出了基于负载分担的跨域VPN优化方案... 详细信息

现有3种基于多协议标签交换(multi-protocol label switching, MPLS)的跨域虚拟私有网络(virtual private network, VPN)方案都存在着设备负载过重、可扩展性不强，以及维护成本较高等问题。为此，提出了基于负载分担的跨域VPN优化方案，优化了网络拓扑结构，设计了输入路由重分发算法(input route redistribution algorithm, IRRA)、输出标签交换算法(output label switching algorithm, OLSA)和路由标记检测算法(route target detecting algorithm, RTDA)。仿真结果表明，优化方案在减轻边界设备性能负载方面效果显著。当需要跨域的VPN实例达到300时，边缘设备的资源利用率较现有跨域方案分别降低了29%,53%,4%;服务商边缘路由器(provider edge router, PE)设备不断增加时，路由连接数较现有跨域方案显著减少，降低网络维护成本，增强网络可扩展性，是实现跨域VPN优化的有效方案。

关键词：边界网关协议多协议标签交换虚拟私有网络跨域

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De Broglie–Bohm Interpretation of Canonical Quantum Cosmology Implies Early Stages of the Universe Dominated by Radiation

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Communications in Theoretical Physics 2013年第12期60卷 691-694页

作者： Ch’ng han Siong Shahidan Radiman School of Applied Physics Faculty of Science and Technology Universiti Kebangsaan Malaysia

The Einstein＇s genera/relativity is formulated in the Hamiltonian form for a spatia/ly Bat, isotropic and homogeneous universe. Subsequently, we perform the canonical quantization procedure to the Hamiltonian to obtain the Wheeler-DeWitt equation. Solving the Wheeler-DeWitt equation and employing the de Broglie-Bohm interpretation to the wave function of the universe, we obtain a new version of spatia/ly fiat Friedmann equation for the early universe where the scale factor of the universe is taken to be sufilcientlv small.

关键词： de Broglie-Bohm interpretation canonical quantum cosmology Friedmann equation Wheeler-DeWitt equation

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Lipschitz and Total-Variational Regularization for Blind Deconvolution

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Communications in Computational Physics 2008年第6期4卷 195-206页

作者： Yu-mei Huang Michael K.ng Centre for Mathematical Imaging and Vision and Department of Mathematics Hong Kong Baptist UniversityKowloon TongHong Kong. Department of Mathematics Lanzhou UniversityGansuChina.

In[3],Chan and Wong proposed to use total variational regularization for both images and point spread functions in blind *** experimental results show that the detail of the restored images cannot be *** this paper,we consider images in Lipschitz spaces,and propose to use Lipschitz regularization for images and total variational regularization for point spread functions in blind *** experimental results show that such combination of Lipschitz and total variational regularization methods can recover both images and point spread functions quite well.

关键词： Lipschitz regularization total variational regularization blind deconvolution texture Poisson singular integral alternating iterative algorithm.