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Strain Effects on Properties of Phosphorene and Phosphorene Nanoribbons:a DFT and Tight Binding Study

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Chinese Physics Letters 2018年第1期35卷 85-89页

作者： Ruo-Yu Zhang ji-ming zheng Zhen-Yi jiang Department of Physics Northwest UniversityXi'an 710069 National Key Laboratory of Photoelectric Technology and Functional Materials Culture Base in Shaanxi Province National Photoelectric Technology and Functional Materials&Application of Science and Technology International Cooperation BaseInstitute of Photonics&Photon-TechnologyNorthwest UniversityXi'an 710069

We perform comprehensive density functional theory calculations of strain effect on electronic structure of black phosphorus(BP)and on BP *** uniaxial and biaxial strain are applied,and the dramatic change of BP's band structure is *** 0-8%uniaxial strain,the band gap can be modulated in the range of 0.55-1.06 eV,and a direct-indirect band gap transition causes strain over 4%in the y *** 0-8%biaxial strain,the band gap can be modulated in the range of 0.35-1.09 eV,and the band gap maintains *** strain to BP nanoribbon,the band gap value reduces or enlarges markedly either zigzag nanoribbon or armchair *** the orbital composition and using a tight-binding model we ascribe this band gap behavior to the competition between effects of different bond lengths on band *** results would enhance our understanding on strain effects on properties of BP and phosphorene nanoribbon.

关键词： Nanoribbons

Theoretical study on martensitic-type transformation path from rutile phase to α-PbO2 phase of TiO2

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Chinese Physics B 2020年第7期29卷 389-392页

作者： Wen-Xuan Wang Zhen-Yi jiang Yan-ming Lin ji-ming zheng Zhi-Yong Zhang Shaanxi Key Laboratory for Theoretical Physics Frontiers Institute of Modern PhysicsNorthwest UniversityXi’an 710069China Stanford Research Computing Center Stanford UniversityStanfordCalifornia 94305USA

The martensitic-type phase transformation paths from the rutile to theα-PbO2 phase of TiO2 are studied with linear interpolation and NEB/G-SSNEB methods based on first-principles *** potential energy surface and the lowest energy path are *** results indicate that the titanium atoms of the rutile phase shuffle along the[0-11]rut crystal direction to form theα-PbO2 *** the phase transition,the oxygen atoms are dragged by the heavier titanium atoms and then reach their new equilibrium *** barrier of phase transition from nudged elastic band theory is about 231 meV,which is qualitatively consistent with previous theoretical calculations from the monoclinic phase to the tetragonal phase for ZrO2 and *** model can also be successfully used to predict the pressure and temperature of the phase transformation.

关键词： phase transition transition barrier Debye’s theory NEB method

Surface micro-arrays enhancing electromagnetic interference shielding of polydimethylsiloxane/multiwalled carbon nanotubes nanocomposites

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Nano Research 2025年第1期18卷 508-519页

作者： Ke jiang Zhi Chen ji Yu Chen zheng Shan Huang ming Wang Chongqing Key Laboratory of Soft-Matter Material Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China School of Mechanics Civil Engineering and ArchitecturesNorthwestern Polytechnical UniversityXi’an 710072China jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China

Herein,the electromagnetic shielding performance of surface concave-convex(SC)and zig-zag micro-arrays was studied by using a simulation prediction and a three-dimensional(3D)printing custom ***,surface stripe concaveconvex(SSC)and surface cylindrical concave-convex(SCC)micro-arrays with or without zig-zag micro-arrays are designed,and their shielding performance is simulated in multi-bands(C-,X-band).The multiwalled carbon nanotubes/polydimethylsiloxane composites(MWCNT/PDMS)with different SC structures and different electrical conductivity are molded in acrylonitrile-butadiene-styrene copolymer(ABS)molds which are printed by a 3D *** results show that the electromagnetic interference shielding effectiveness(EMI SE)of the samples can be enhanced by constructing the SC micro-arrays with zig-zag micro-arrays,and improving with the increase of conductivity and *** addition,the shielding mechanism of the SC-MWCNT/PDMS composites is investigated and discussed by an electromagnetic simulation.

关键词： surface micro-arrays electrical properties electromagnetic interference(EMI)shielding three-dimensional(3D)printing

C-Axis Current -Voltage Characteristics of Mesa Structures on Bi2Sr2CaCu2O8+δ Single Crystals Fabricated by a Simple Technique Without Photolithography

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Chinese Physics Letters 1999年第9期16卷 686-688页

作者： FENG Yi-jun SHAN Wen-lei YOU Li-Xing ZHOU Gan-dong ji zheng-ming KANG Lin XU Wei-wei YANG Sen-zu WU Pei-heng ZHANG Yu-heng Department of Electronic Science and Engineering Nanjing UniversityNanjing 210093 Structure Research Laboratory University of Science and Technology of ChinaHefei 230026

A simple technique is reported for fabricating the mesa structure on Bi2Sr2CaCu2O8+δ single crystal. In the patterning process, metal masks are used instead of photolithography and argon ion milling is applied to form the small mesa on the Bi2Sr2CaCu2O8+δ crystal surface. Real four-probe transport measurements are made on the mesa structure and typical c-axis current-voltage (I - V) characteristics of the intrinsic Josephson effect have been observed. The superconducting gap parameter can be extracted from the multi-branch structure in the I - V characteristics. Additionally, from the strong hysteresis in the I - V characteristics, the capacitance CJ of the unit intrinsic Josephson junction has been estimated to be 2.3pF, which is in good agreement with that evaluated from the geometric parameters of the unit junction between the two copper oxide layers.

关键词： characteristics. branch hysteresis

Highly Oriented HgBaCaCuO Superconducting Thin Films Prepared by Laser Ablation

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Chinese Physics Letters 1997年第7期14卷 546-548页

作者： YU Yang SHAO Hui-min ZENG Zhao-yang SUN Ai-min QIN Meng-jun REN Chong XU Xiao-nong DING Shi-ying jiN Xin YAO Xi-xian ZHOU Jun ji zheng-ming YANG Sheng-zu ZHANG Wen-lan Department of Physics and Laboratory of Microstructure of Solid States Nanjing UniversityNanjing 210093 Department of Electronic Science and Engineering Nanjing UniversityNanjing 210093 State Key Laboratory of Metallogenesis Nanjing UniversityNanjing 210093

Pb-doped HgBa_(2)CaCu_(2)O_(y) films were prepared on the(100)SrTiO_(3) substrate by using laser ablation followed by post-Hg-vapor *** films are dominated by c-axis-oriented Hg-1212 phase as indicated by x-ray diffraction and electromagnetic *** transition temperature Tc0 is 110 *** critical current density Jc achieved 10^(6) A/cm^(2) at 77K and zero applied field.

关键词： Films Highly field.

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一类二阶哈密尔顿系统的周期解

数学学报（中文版） 2010年第4期53卷 721-726页

作者：郑继明程迪祥重庆邮电大学应用数学研究所重庆400065 重庆邮电大学移通学院重庆401520

在(CPS)_C及(PS)_C条件下,利用Ambrosetti-Rabinowitz对称形式的山路引理,研究了一类二阶哈密尔顿保守系统在给定能量面上的无穷多个周期解的存在性问题.

关键词：二阶哈密尔顿系统周期解带(CPS)_C及(PS)_C条件的对称形式的山路引理

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地名英译何去何从?

上海翻译 2006年第3期 57-59页

作者：葛校琴季正明南京国际关系学院江苏南京210039

文章认为,地名英译的历来做法是“专名音译,通名意译”。其演变主要是音译部分用汉语拼音取代威妥玛式拼写。最近几年,国家推广并实行地名国际罗马化标准,要求不管专名通名,一律采用汉语拼音音译汉语地名。一方是一直以来译界具有共识... 详细信息

文章认为,地名英译的历来做法是“专名音译,通名意译”。其演变主要是音译部分用汉语拼音取代威妥玛式拼写。最近几年,国家推广并实行地名国际罗马化标准,要求不管专名通名,一律采用汉语拼音音译汉语地名。一方是一直以来译界具有共识的默认做法,另一方则是国家的法律规定。地名英译何去何从?翻译教师处于两难的境地。

关键词：地名英译国际罗马化

多群组和设备侧密钥分发的安全认证和密钥协商

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信号处理 2017年第7期33卷 1010-1017页

作者：王磊王涛姚继明郑宝玉南京邮电大学教育部宽带无线通信与传感网技术重点实验室江苏南京210003 全球能源互联网研究院江苏南京210003

随着MTC(Machine Type Communication)移动终端数量不断增长,网络拥塞问题日益严重。本文提出了一种多群组和设备侧密钥分发的安全认证和密钥协商(Multi-based and Device Side Key Distribution Secure Authentication and Key Agreement,MGDK-AKA)协议。该协议首先将大量请求接入设备按照一定的规则分成多个群组。组首对组成员的请求信息进行聚合,组首与核心网完成整个认证和密钥协商过程,组成员仅与组首之间完成相互认证,避免了大量设备同时访问核心网络。同时将原核心网侧的密钥分发转移到设备侧完成,进一步克服网络拥塞,并保证数据的安全传输。安全性分析表明了提出的方案可以完成安全目标,并抵抗一些攻击。仿真结果验证了该协议在网络拥塞避免的可行性。

关键词：群组认证网络拥塞认证和密钥协商密钥分发 MTC

Regulation and function of endoplasmic reticulum autophagy in neurodegenerative diseases

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Neural Regeneration Research 2025年第1期20卷 6-20页

作者： Xiu-Yun Zhao De-En Xu ming-Lei Wu ji-Chuan Liu Zi-Ling Shi Quan-Hong Ma Department of Neurology and Clinical Research Center of Neurological Disease the Second Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina Institute of Neuroscience&jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases Soochow UniversitySuzhouJiangsu ProvinceChina Department of Neurology Jiangnan University Medical CenterWuxiJiangsu ProvinceChina

The endoplasmic reticulum,a key cellular organelle,regulates a wide variety of cellular *** reticulum autophagy,one of the quality control systems of the endoplasmic reticulum,plays a pivotal role in maintaining endoplasmic reticulum homeostasis by controlling endoplasmic reticulum turnover,remodeling,and *** this review,we briefly describe the endoplasmic reticulum quality control system,and subsequently focus on the role of endoplasmic reticulum autophagy,emphasizing the spatial and temporal mechanisms underlying the regulation of endoplasmic reticulum autophagy according to cellular *** also summarize the evidence relating to how defective or abnormal endoplasmic reticulum autophagy contributes to the pathogenesis of neurodegenerative *** summary,this review highlights the mechanisms associated with the regulation of endoplasmic reticulum autophagy and how they influence the pathophysiology of degenerative nerve *** review would help researchers to understand the roles and regulatory mechanisms of endoplasmic reticulum-phagy in neurodegenerative disorders.

关键词： autophagy endoplasmic reticulum endoplasmic reticulum autophagy endoplasmic reticulum quality control system endoplasmic reticulum receptors endoplasmic reticulum-associated degradation neurodegeneration neurodegenerative disease selective autophagy unfolded protein response