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Generation of Entangled States of Multiple Superconducting Quantum Interference Devices in Cavity

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Communications in Theoretical Physics 2006年第4期45卷 709-711页

作者： zhan zhi-Ming LI Jia-Hua LI Wei-Bin School of Physics ＆ Information Engineering Jianghan University Wuhan 430056 China Department of Physics Huazhong University of Science and Technology Wuhan 430074 China Center for Cold Atom Physics the Chinese Academy of Sciences Wuhan 430071 China

We propose a scheme for generating the maximally entangled states of many superconducting quantum interference devices （SQUIDs） by using a quantized cavity field and classical microwave pulses in cavity. In the scheme, the maximally entangled states can be generated without requiring the measurement and individual addressing of the SQUIDs.

关键词： entanglement superconducting cavity

Emitting stability of poly(9,9-dialkylfluorene-co-N-butylcarbazole) by solid-state oxidative coupling polymerization

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Chinese Chemical Letters 2007年第1期18卷 76-78页

作者： Wei Bin Bai zhi Yuan Chen Cai Mao zhan College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China

Dihexylfluorene and N-butylcarbazole were copolymerized by solid-state oxidative coupling polymerization in the presence of anhydrous FeCl3 at room temperature. The solid-state films of the copolymers emitted blue lig... 详细信息

关键词： Solid-state oxidative coupling polymerization Fluorene-carbazole copolymer, Emitting stability Photoluminescence

Current situation and challenge of registry in China

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Frontiers of Medicine 2014年第3期8卷 294-299页

作者： Yang zhang Yuji Feng zhi Qu Yali Qi Siyan zhan Department of Epidemiology and Biostatistics School of Public Health Peking University Health Science Centre Beijing 100191 China Pfizer Investment Co. Ltd. Beijing 100010 China Department of Epidemiology School of Public Health Beihua University Jilin 132001China

Increasing emphasis has been placed on registries for an organized system used in developing clinical research to improve health care. China has sufficient data that can be applied broadly, but the heterogeneity and irregularity of registries limit their applicability. This article aims to describe the status of registries in China and the related challenges. Patient registries for observational studies were retrieved from the International Clinical Trials Registry to quantitatively evaluate the number of comparatively high-quality registries in China. A literature search was also performed to provide support and updates. A total of 64 patient registries were retrieved from *** using disease, product, and health service as criteria. The sample sizes ranged from 15 to 30 400, with only 12 registries marked as completed. This article describes and compares the detailed information in many aspects. The efficient use of registries has already made considerable progress in China; however, registries still require standardization, high-quality transition, and coordinated development.

关键词： Chinese registry study patient registries observational study

Growth and Saturation of the Relativistic Harmonic Radiation

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Chinese Physics Letters 1996年第1期13卷 31-34页

作者： ZENG Gui-hua YU Wei SHEN Bai-fei XU zhi-zhan Institute of Optics and Fine Mechanics Academia SinicaShanghai 201800

A series of coupling equations for the relativistic coherent harmonic generation is derived taking account of the coupling effect among the harmonic contents and plasmas *** these equations,the growth and satuTaiion of amplitude of the third harmonic wave is *** show that the coupling effect induces the saturation of harmonics,which is identical with ones of the Lagrangian description.

关键词： wave. harmonic coupling

Direct electrochemical reduction of solid vanadium oxide to metal vanadium at low temperature in molten CaCl_2-NaCl

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International Journal of Minerals,Metallurgy and Materials 2012年第6期19卷 499-505页

作者： Zhuo-fei Cai zhi-mei zhang zhan-cheng Guo Hui-qing Tang State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing 100083 China

V205 sintered pellets and graphite rods were employed as the cathode and the anode, respectively; a molten CaC12-NaCI salt was used as the electrolyte. Then, V205 was directly reduced to metal vanadium by the Fray-Farthing-Chen （FFC） method at 873 K to realize low-temperature electrolysis. Two typical experimental conditions, electrolysis time and voltage, were taken into account to investigate the current efficiency and remaining oxygen content in electrolyzed products. The composition and microstmcture of the products were charac- terized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. SEM observations show that a higher voltage （1.8-3.4 V） and a longer electrolysis time （2-5 h） can improve the product quality separately, that is, a lower remaining oxygen content and a more uniform microstructure. The products with an oxygen content of 0.205wt% are successfully obtained below 3.4 V for 10 h. However, the current effi- ciency is low, and further work is required.

关键词： vanadium metallurgy vanadium pentoxide direct reduction electrolysis

Discovering Overlapping Communities by Clustering Local Link Structures

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Chinese Journal of Electronics 2017年第2期26卷 430-434页

作者： TAO Haicheng WANG Youquan WU zhi'ang BU zhan CAO Jie College of Computer Sci.and Eng. Nanjing University of Science and Technology

Recent advances point out that the existing community detection methods commonly face two challenges:incorrect base-structures and incorrect membership of *** overcome both problems,a Local link structure(LLS) clustering based method for overlapping community detection is *** extend the similarity of a pair of links to a group of links named LLS,and thus transform mining LLSs as a pattern mining *** prove that LLS with an appropriate threshold can filter weak-ties in the form of bridge and local bridge with its span being larger than 3.A compositive framework is presented for overlapping community detection based on LLS mining and *** experiments on both synthetical and real-world networks demonstrate that our method has advantage over six existing methods on discovering higher quality communities.

关键词： Complex network Overlapping community detection Weak-ties Hypergraph Clustering

Non-UV Photoelectric Properties of the ni/n-Si/N+-SiC Isotype Heterostructure Schottky Barrier Photodiode

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Chinese Physics Letters 2013年第9期30卷 149-152页

作者： LI Lian-Bi CHEN zhi-Ming REN zhan-Qiang GAO zhan-Jun Department of Electronic Engineering Xi’an University of TechnologyXi’an 710048 School of Science Xi’an Polytechnic UniversityXi’an 710048

The energy-band structure and non-ultraviolet photoelectric properties of a ni/n-Si/N^(+)-SiC isotype heterostruc-ture Schottky photodiode are simulated by using *** are energy offsets in the conduction and valance band of the heterojunction,which are about 0.09eV and 1.79eV,*** non-UV photodiode with this structure is fabricated on a 6H-SiC(0001)substrate.𝐾J–V𝑊measurements indicate that the device has good rectifying behavior with a rectification ratio up to 200 at 5V,and the turn-on voltage is about *** non-ultraviolet illumination of 0.6W/cm^(2),the device demonstrates a significant photoelectric response with a photocurrent density of 2.9mA/cm^(2)and an open-circuit voltage of ***-ultraviolet operation of the SiC-based photoelectric device is initially realized.

关键词： Schottky heterojunction Si/N

Application of SSOR-PCGM with improved iteration format in FEM simulation of massive concrete

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Water Science and Engineering 2011年第3期4卷 317-328页

作者： Lin HAN Zi-ming zhanG zhi-qiang ni College of Mechanics and Materials Hohai University Nanjing 210098 P. R. China

In this study, for the purpose of improving the efficiency and accuracy of numerical simulation of massive concrete, the symmetric successive over relaxation-preconditioned conjugate gradient method （SSOR-PCGM） with an improved iteration format was derived and applied to solution of large sparse symmetric positive definite linear equations in the computational process of the finite element analysis. A three-dimensional simulation program for massive concrete was developed based on SSOR-PCGM with an improved iteration format. Then, the programs based on the direct method and SSOR-PCGM with an improved iteration format were used for computation of the Guandi roller compacted concrete （RCC） gravity dam and an elastic cube under free expansion. The comparison and analysis of the computational results show that SSOR-PCGM with the improved iteration format occupies much less physical memory and can solve larger-scale problems with much less computing time and flexible control of accuracy.

关键词： massive concrete symmetric successive over relaxation-preconditioned conjugate gradient method (SSOR-PCGM) improved iteration Jbrmat .finite element method (FEM) numerical simulation

Pivotal Factors Concerned in Design of Acupuncture Clinical Research:From Two Articles in JAMA

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Chinese Journal of Integrative Medicine 2017年第11期23卷 809-811页

作者： WU Jia-ni QIN Zong-shi LIU zhi-shun Department of Acupuncture Guang anmen HospitalChina Academy of Chinese MedicaI Sciences Beijing(100053)China

Two randomized controlled trials of acupuncture concerning polycystic ovary syndrome（PCOS） and stress urinary incontinence（SUI） were published simultaneously in the 24 th issue, 2017 of The Journal of the American Medical Association（JAMA）. A trial involving PCOS indicated that active acupuncture did not increase live birth compared with sham acupuncture; meanwhile, another trial referring to SUI showed that electroacupuncture resulted in less urine leakage compared with sham electroacupuncture. With an eye to the negative and positive results of acupuncture, three pivotal factors should be contemplated：（1） proper illness for acupuncture, that is, a problem need to be solved in current medical science, and acupuncture may really work for it;（2） proper pre-studied primary outcome, which is better be objective and repeatedly measurable to reveal the therapeutic effect of acupuncture truly and objectively;（3） proper sham control, which can blind the patients to the upmost extent with minimal biological effects. Through the publication of clinical trials of acupuncture in high-impact journals in recent years, researchers should have confidence in their clinical trials by pondering over these three pivotal factors.

关键词： acupuncture clinical trials study design high impact journal