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Theoretical Study on Mechanism of Reaction of OH with HO2NO2

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Chinese Journal of Chemical physics 2008年第1期21卷 32-38页

作者： Yan Tian Tian-jing he Li he Fan-chen Liu Dong-ming chen Department of Chemical physics University of Science and Technology of China Hefei 230026 China Department of electronic science and technology University of Science and Technology of ChinaHefei 230025 China school of science Anhui Agricultural University Hefei 230036 China

The reaction of HO2NO2 （peroxynitric acid, PNA） with OH was studied by the hybrid density functional B3LYP and CBS-QB3 methods. Based on the calculated potential energy surface, five reaction channels, H20＋NO2＋O2, HOOH＋NO3, NO2＋HO3H, HO2＋HONO2 and HO2＋HOONO, were examined in detail. The major reaction channel is PNA＋OH→M1→TS1→H2O＋NO2＋O2. Taking a pre-equilibrium approximation and using the CBS-QB3 energies, the theoretical rate constant of this channel was calculated as 1.13×10-12 cm^3/（molecule s） at 300 K, in agreement with the experimental result. Comparison between reactions of HOONO2＋OH and HONO2＋OH was carried out. For HOR＋OH reactions, the total rate constants increase from R=NO2 to R=ONO2, which is consistent with experimental measurements.

关键词： Reaction Peroxynitric acid ab initio calculation Rate constant

Development and calibration of the Moon-based EUV camera for chang'e-3

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Research in Astronomy and Astrophysics 2014年第12期14卷 1654-1663页

作者： Bo chen Ke-Fei Song Zhao-Hui Li Qing-Wen Wu Qi-Liang Ni xiao-Dong Wang Jin-Jiang Xie Shi-Jie Liu Ling-Ping he Fei he xiao-Guang Wang Bin chen Hong-Ji Zhang xiao-Dong Wang Hai-Feng Wang Xin Zheng Shu-Lin E Yong-cheng Wang Tao Yu Liang Sun Jin-Ling Wang Zhi Wang Liang yang Qing-Long Hu Ke Qiao Zhong-Su Wang Xian-Wei yang Hai-Ming Bao Wen-Guang Liu Zhe Li Ya chen yang Gao Hui Sun Wen-chang chen changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences

The process of development and calibration for the first Moon-based ex- treme ultraviolet （EUV） camera to observe Earth＇s plasmasphere is introduced and the design, test and calibration results are presented. The EUV camera is composed of a multilayer film mirror, a thin film filter, a photon-counting imaging detector, a mech- anism that can adjust the direction in two dimensions, a protective cover, an electronic unit and a thermal control unit. The center wavelength of the EUV camera is 30.2 nm with a bandwidth of 4.6nm. The field of view is 14.7° with an angular resolution of 0.08°, and the sensitivity of the camera is 0.11 count s-1 Rayleigh-1. The geomet- ric calibration, the absolute photometric calibration and the relative photometric cal- ibration are carried out under different temperatures before launch to obtain a matrix that can correct geometric distortion and a matrix for relative photometric correction, which are used for in-orbit correction of the images to ensure their accuracy.

关键词： chang'e-3 -- EUV camera: development: calibration -- Earth's plas-masphere -- lunar exploration

YBa_2Cu_3O_7超导管内磁场与外磁场的关系

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物理学报 1989年第6期38卷 1016-1020页

作者：徐凤枝杨沛然陈烈陈肖兰柴璋李碧钦中国科学院物理研究所中国科学技术大学研究生院

本文报道了当外磁场H_e较低时(H_eH_(rm)时,这几个量增加较大。当直流外磁场he<1/2H_(rm)时,超导管可将其完全屏蔽,对交流场不能完全屏蔽,但其屏蔽效果仍优于最好的金属屏蔽筒。

本文报道了当外磁场H_e较低时(H_eH_(rm)时,这几个量增加较大。当直流外磁场he2H_(rm)时,超导管可将其完全屏蔽,对交流场不能完全屏蔽,但其屏蔽效果仍优于最好的金属屏蔽筒。

关键词：超导合金超导管磁场

Alliance of atomic-scale/nanoscale Fe/Co active sites with hierarchically porous N-doped carbon frameworks for efficient electrocatalytic oxygen reduction

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Rare Metals 2023年第11期42卷 3766-3779页

作者： Hai-Hua yang xiao-Rong Qian Na Zhang Xia-Ting Jia Zhi-Yan Wen xiao-Bo chen Min-Jie Zhou Key Laboratory of Hunan Province for Advanced Carbon-Based Functional Materials Hunan Institute of Science and TechnologyYueyang414006China school of Chemistry and Chemical Engineering Hunan Institute of Science and TechnologyYueyang414006China school of physics and electronic science Hunan Institute of Science and TechnologyYueyang414006China Department of Chemistry University of Missouri-Kansas CityKansas City64111USA

Ingenious establishment of transition metal-nitrogen-carbon electrocatalysts with diverse catalytic active sites and hierarchically porous frameworks is highly significant to boost the oxygen reduction reaction(ORR)in Zn-air batteries(ZABs).In this study,Fe/Co co-doped zeolitic imidazolium frameworks(ZIFs)and graphitic carbon nitride(g-C_(3)N_(4))were integrated and pyrolyzed to construct carbon-based electrocatalysts containing Fe,Co and N elements(labelled as Co-CoFe@NRPC),in which atomic-sc ale FeN_x and CoN_x,and nano scale metallic Co and CoFe alloy moieties were aligned with hierarchically porous N-doped carbon frameworks constructed by interconnected micropolyhedrons,nano tubes and *** diverse active moieties guaranteed excellent intrinsic catalytic activity,while the hierarchically porous N-doped carbon frameworks ensured admirable accessibility of the catalytic active sites,excellent electrical conductivity,satisfactory mass transport and good ***,the optimized Co-CoFe@NRPC-90(with 90 mg g-C_(3)N_(4) added)electrocatalyst exhibited excellent ORR performance with a high half-wave potential of 885 mV(*** hydrogen electrode(Rhe)),diffusion-limiting current density of 6.15 mA·cm^(-2),desirable durability and methanol ***,the liquid ZAB established with Co-CoFe@NRPC-90 as an air-cathode electrocatalyst manifested an outstanding power density(281 mW·cm^(-2))and specific capacity(820.9 mAh·g_(Zn)^(-1)),transcending the liquid ZAB based on a commercial Pt/C electrocatalyst.

关键词： Fe/Co co-doped zeolitic imidazolium frameworks Graphitic carbon nitride Transition metal-nitrogen-carbon electrocatalyst Oxygen reduction reaction(ORR)

Verification of SEU resistance in 65 nm high-performance SRAM with dual DICE interleaving and EDAC mitigation strategies

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Nuclear science and Techniques 2021年第12期32卷 64-76页

作者： Ze he Shi-Wei Zhao Tian-Qi Liu chang Cai xiao-Yu Yan Shuai Gao Yu-Zhu Liu Jie Liu Institute of Modern physics Chinese Academy of SciencesLanzhou 730000China Department of Computer science and technology Tsinghua UniversityBeijing 100084China school of Nuclear science and technology University of Chinese Academy of SciencesBeijing 100049China

A dual double interlocked storage cell(DICE)interleaving layout static random-access memory(SRAM)is designed and manufactured based on 65 nm bulk complementary metal oxide semiconductor *** single event upset(SEU)cross sections of this memory are obtained via heavy ion irradiation with a linear energy transfer(LET)value ranging from 1.7 to 83.4 MeV/(mg/cm^(2)).Experimental results show that the upset threshold(LETth)of a 4 KB block is approximately 6 MeV/(mg/cm^(2)),which is much better than that of a standard unhardened SRAM with an identical technology node.A 1 KB block has a higher LETth of 25 MeV/(mg/cm^(2))owing to the use of the error detection and correction(EDAC)*** a Ta ion irradiation test with the highest LET value(83.4 MeV/(mg/cm^(2))),the benefit of the EDAC code is reduced significantly because the multi-bit upset proportion in the SEU is increased *** with normal incident ions,the memory exhibits a higher SEU sensitivity in the tilt angle irradiation ***,the SEU cross section indicates a significant dependence on the data *** comprehensively considering HSPICE simulation results and the sensitive area distributions of the DICE cell,it is shown that the data pattern dependence is primarily associated with the arrangement of sensitive transistor pairs in the ***,some suggestions are provided to further improve the radiation resistance of the *** implementing a particular design at the layout level,the SEU tolerance of the memory is improved significantly at a low area ***,the designed 65 nm SRAM is suitable for electronic systems operating in serious radiation environments.

关键词： Double interlocked storage cell(DICE) Error detection and correction(EDAC)code heavy ion Radiation hardening technology Single event upset(SEU) Static random-access memory(SRAM)

A two-dimensional fully analytical model with polarization effect for off-state channel potential and electric field distributions of GaN-based field-plated high electron mobility transistor

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Chinese physics B 2014年第8期23卷 487-494页

作者：毛维佘伟波杨翠张超张进成马晓华张金风刘红侠杨林安张凯赵胜雷陈永和郑雪峰郝跃 Key Laboratory of Ministry of Education for Wide Band-Gap Semiconductor Materials and Devices School of MicroelectronicsXidian University school of physics and Optoelectronic Engineering Xidian University

In this paper, we present a two-dimensional （2D） fully analytical model with consideration of polarization effect for the channel potential and electric field distributions of the gate field-plated high electron mobility transistor （FP-heMT） on the basis of 2D Poisson＇s solution. The dependences of the channel potential and electric field distributions on drain bias, polarization charge density, FP structure parameters, A1GaN/GaN material parameters, etc. are investigated. A simple and convenient approach to designing high breakdown voltage FP-heMTs is also proposed. The validity of this model is demonstrated by comparison with the numerical simulations with Silvaco-Atlas. The method in this paper can be extended to the development of other analytical models for different device structures, such as MIS-heMTs, multiple-FP heTMs, slant-FP heMTs, etc.

关键词： analytical model of GaN-based field-plated heMT polarization effect potential electric field

Performing optical logic operations by a diffractive neural network

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Light(science & Applications) 2020年第1期9卷 1448-1454页

作者： Chao Qian xiao Lin xiaobin Lin Jian Xu yang Sun Erping Li Baile Zhang Hongsheng chen Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical InstrumentationCollege of Information Science and Electronic EngineeringZhejiang University310027 HangzhouChina ZJU-Hangzhou Global science and technology Innovation Center Key Lab.of Advanced Micro/Nano Electronic Devices&Smart Systems of ZhejiangZhejiang University310027 HangzhouChina Department of Electrical Engineering California Institute of TechnologyPasadenaCAUSA ZJU-UIUC Institute Zhejiang University310027 HangzhouChina Division of physics and Applied physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore

Optical logic operations lie at the heart of optical computing,and they enable many applications such as ultrahighspeed information ***,the reported optical logic gates rely heavily on the precise control of input light signals,including their phase difference,polarization,and intensity and the size of the incident *** to the complexity and difficulty in these precise controls,the two output optical logic states may suffer from an inherent instability and a low contrast ratio of ***,the miniaturization of optical logic gates becomes difficult if the extra bulky apparatus for these controls is *** such,it is desirable to get rid of these complicated controls and to achieve full logic functionality in a compact photonic *** a goal remains ***,we introduce a simple yet universal design strategy,capable of using plane waves as the incident signal,to perform optical logic operations via a diffractive neural ***,the incident plane wave is first spatially encoded by a specific logic operation at the input layer and further decoded through the hidden layers,namely,a compound Huygens’*** is,the judiciously designed metasurface scatters the encoded light into one of two small designated areas at the output layer,which provides the information of output logic ***,after training of the diffractive neural network,all seven basic types of optical logic operations can be realized by the same *** a conceptual illustration,three logic operations(NOT,OR,and AND)are experimentally demonstrated at microwave frequencies.

关键词： surface operations precise

基于白光中子源的^(197)Au中子辐射俘获截面测量及共振参数分析

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物理学报 2024年第7期73卷 104-113页

作者：罗淏天张奇玮栾广源王晓宇邹翀任杰阮锡超贺国珠鲍杰孙琪黄翰雄王朝辉吴鸿毅顾旻皓余滔解立坤陈永浩安琪白怀勇鲍煜曹平陈昊磊陈琪萍陈裕凯陈朕崔增琪樊瑞睿封常青高可庆韩长材韩子杰何泳成洪杨黄蔚玲黄锡汝季筱璐吉旭阳蒋伟江浩雨姜智杰敬罕涛康玲康明涛李波李超李嘉雯李论李强李晓李样刘荣刘树彬刘星言穆奇丽宁常军齐斌斌任智洲宋英鹏宋朝晖孙虹孙康孙晓阳孙志嘉谭志新唐洪庆唐靖宇唐新懿田斌斌王丽娇王鹏程王琦王涛峰文杰温中伟吴青彪吴晓光吴煊羊奕伟易晗于莉于永积张国辉张林浩张显鹏张玉亮张志永赵豫斌周路平周祖英朱丹阳朱科军朱鹏朱兴华中国原子能科学研究院核数据重点实验室北京102413 中国科学院高能物理研究所北京100049 散裂中子源科学中心东莞523803 核探测与核电子学国家重点实验室北京100049 中国科学技术大学近代物理系核探测与核电子学国家重点实验室合肥230026 北京大学物理学院核物理与核技术国家重点实验室北京100871 中国工程物理研究院核物理与化学研究所绵阳621900 西北核技术研究院西安710024 中国科学院大学北京100049 中国科学技术大学工程与应用物理系合肥230026 北京航空航天大学物理学院北京100083 华能山东石岛湾核电有限公司荣成264312

中子辐射俘获反应在反应堆运行、核装置设计及核天体物理研究中起重要的作用.4πBaF_(2)探测装置有着高时间分辨能力、低中子灵敏度、高探测效率等优点,适合开展中子辐射俘获反应截面数据的测量.中国原子能科学研究院核数据重点实验室... 详细信息

中子辐射俘获反应在反应堆运行、核装置设计及核天体物理研究中起重要的作用.4πBaF_(2)探测装置有着高时间分辨能力、低中子灵敏度、高探测效率等优点,适合开展中子辐射俘获反应截面数据的测量.中国原子能科学研究院核数据重点实验室建立了伽马全吸收装置(Gamma total absorption facility,GTAF),该装置用28块六棱BaF_(2)晶体和12块五棱BaF_(2)晶体构成了外径25 cm,内径10 cm的球壳,覆盖了95.2%的立体角.利用GTAF在中国散裂中子源Back-n束线上,测量了197Au(n,γ)的反应截面数据.测量数据通过能量筛选、PSD方法、晶体多重性筛选进行了初步本底扣除,随后结合对^(nat)C及空样品的测量数据对本底进行了分析及扣除,获得了197Au俘获反应的产额,利用SAMMY程序拟合得到了^(197)Au在1—100 e V的共振能量、中子共振宽度和伽马共振宽度参数.实验测量结果与ENDF/B-VIII.0数据库符合良好,其共振参数存在一定差异,分析原因可能与GTAF能量分辨率、Back-n的中子能谱测量精度、以及实验本底扣除方法相关,这也是下一步工作的重点.

关键词：中子辐射俘获截面共振参数白光中子源伽马全吸收装置

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体外冲击波响应型唑来膦酸钙纳米颗粒靶向控释对骨质疏松骨代谢及骨量的影响

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中国医学前沿杂志（电子版） 2024年第7期16卷 47-54,I0002页

作者：李浩肖健胡帆王策陈奎邢更彦安徽医科大学第五临床医学院武警临床学院安徽合肥230032 中国人民解放军总医院第三医学中心骨科北京100039 中国科学院高能物理研究所纳米生物效应与安全性重点实验室北京100049

目的研究体外冲击波(extracorporeal shock wave,ESW)响应型唑来膦酸(zoledronic acid,ZOL)钙纳米颗粒(ZOL-Ca nanoparticals,ZCNP)的制备及其靶向控释对骨质疏松骨代谢及骨量的影响。方法通过模板法以ZOL为磷源,CaCl2为钙源制备ZCNP。利用扫描电子显微镜、动态光散射对ZCNP进行表征。通过紫外可见吸收光谱及电感耦合等离子体光发射光谱法评估ZOL的负载以及载药率。利用CCK-8法检测ZCNP对鼠源骨髓单核细胞(bone marrow mononu-clear cells,BMMs)活力的影响;采用溶血实验检测ZCNP的生物相容性。通过荧光标记ZCNP对其骨靶向性进行验证。采用药物释放实验验证了ZCNP的ESW响应性。在体外,利用TRAP染色检验ZCNP的破骨抑制情况;ARS染色检验ZCNP对成骨活性的影响。在体内,利用卵巢摘除骨质疏松模型验证ZCNP对骨量的影响。结果ZCNP呈类球形结构,约60 nm。ZCNP的ZOL负载率为(59.68±1.48)%。ZCNP在0、0.01、0.1、1、10μmol/L浓度下对小鼠BMMs的细胞活性影响无明显差异(P>0.05)。ZCNP在ESW作用下可快速释放ZOL。ESW+ZCNP可抑制破骨细胞活性,促进成骨细胞增殖。ESW+ZCNP可明显提高卵巢摘除骨质疏松模型局部骨量。结论ESW响应型ZCNP可通过有效精准靶向控释,抑制破骨,促进成骨提升卵巢摘除模型局部骨量,预防骨质疏松性骨折。

关键词：体外冲击波唑来膦酸靶向控释骨质疏松性骨折