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Quantum Computation with Nonlinear Optics

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Communications in Theoretical Physics 2008年第1期49卷 107-110页

作者： LIU Yang zhang wen-hong zhang Cun-Lin LONG Gui-Lu Key Laboratory of Atomic and Molecular NanoSciences and Department of Physics Tsinghua University Beijing 100084China Department of Physics Capital Normal University Beijing 100037 China Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China

We propose a scheme of quantum computation with nonlinear quantum optics. Polarization states of photons are used for qubits. Photons with different frequencies represent different qubits. Single qubit rotation operation is implemented through optical elements like the Faraday polarization rotator. Photons are separated into different optical paths, or merged into a single optical path using dichromatic mirrors. The controlled-NOT gate between two qubits is implemented by the proper combination of parametric up and down conversions. This scheme has the following features：（1） No auxiliary qubits are required in the controlled-NOT gate operation; （2） No measurement is required in the course of the computation; （3） It is resource efficient and conceptually simple.

关键词： quantum computation nonlinear optics parametric up(down)-conversion polarization modulator

Synthesis and Electrochemical Characterization of Azomethine Containing N-Ethylcarbazole Group

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Chemical Research in Chinese Universities 2005年第6期21卷 743-748页

作者： LI Ya-peng SUN Li-min SUN Ming-hao LI hong-tu zhang hong-wen WANG Jing-yuan College of Chemistry The First Medical College Jilin University Changchun 130023 P. R. China

Conjugated aromatic azomethines containing a carbazole group were synthesized. Their structures have been confirmed by IR, MS and UV spectrometries. When iodine was used as the dope to the conjugated compounds, the electrical conductivities （EC） of the doped conjugated compounds were increased by several orders of magnitude. The thermal stability of these two compounds investigated by TGA shows a good result, which guarantees the correct result of EC when the compounds are heated. As can be seen from the CV characterization of the electrochemical properties of these two compounds, the azomethine diamine and p-aminophenyl-9-ethylcarbazolyl azomethine possess electrochemical activity, which arises from the heteroatom of molecules.

关键词： Azomethine Carbazole Conjugated compound Electrochemical activity Doped material

Improvement of a MIMO antenna structure with combination of transmit beamforming and spatial multiplexing

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The Journal of China Universities of Posts and Telecommunications 2008年第1期15卷 91-95页

作者： YUAN Ting-ting zhang Lei YANG hong-wen YANG Da-cheng School of Telecommunication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

Downlinks of the cellular systems generally have more transmit antennas than receive antennas. To efficiently exploit all antenna resources, a technique that combines the advantage of beamforming and spatial multiplexing has been proposed, which partitions the transmit antennas into neighboring sub-groups. In this article, this technique is further improved by Eq. （1） allowing non-contiguous antenna grouping, and Eq. （2） adopting two new grouping criteria： minimum signal distance maximization （MSDM） criterion and maximum correlation coefficient minimization （MCCM） criterion. Simulation results indicate that these improvements can bring noticeable gains in the Rayleigh fiat fading channel environment.

关键词： multiple-input multiple-output (MIMO) beamforming antenna grouping uncorrelated channel semi-correlated channel

Role and mechanism of rosiglitazone on the impairment of insulin secretion induced by free fatty acids on isolated rat islets

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Chinese Medical Journal 2006年第7期119卷 574-580页

作者： TIAN Jing-yan LI Guo GU Yan-yun zhang hong-li ZHOU wen-zhong WANG Xiao ZHU hong-da LUO Tian-hong LUO Min Shanghai Institute of Endocrinology and Metabolism ShanghaiClinical Center of Endocrine and Metabolic Diseases RuijinHospital Shanghai Second Medical University Shanghai 200025China

Background Prolonged exposure of pancreatic β-cells to fatty acids increases basal insulin secretion but inhibits glucose-stimulated insulin secretion. Rosiglitazone is a new antidiabetic agent of the thiazolidinediones. However, the relationship between thiazolidinediones and insulin secretion is highly controversial. The aim of this study is to explore the effect and mechanism of rosiglitazone on insulin secretion of islets under chronic exposure to free fatty acids （FFA）.Methods Pancreatic islets were isolated from the pancreata of male Sprague-Dawley rats by the collagenase digestion and by the dextran gradient centrifugation method. The purified islets were cultured in the presence or absence of rosiglitazone and palmitate for 48 hours. The insulin secretion was measured by radioimmunoassay. The mRNA level of peroxisome proliferator-activated receptor y, uncoupling protein 2 0dCP-2） and insulin were determined by real-time polymerase chain reaction （PCR）. The cell cytotoxicity assay was measured by cell counting kit-8.Results Islets exposed to elevated palmitate for 48 hours showed an increased basal and a decreased glucose-stimulated insulin secretion （P〈0.01）. The mRNA level of UCP-2 was increased by 3.7 fold in the 0.5 mmol/L concentration of palmitate. When islets were cultured with palmitate （0.5 mmol/L） in the presence of rosiglitazone （1.0 pmol/L）, both basal and glucose-stimulated insulin secretion reversed to a pattern of control islets （P〈0.05, P〈0.0 1）. The addition of rosiglitazone in the culture medium decreased the mRNA level of UCP-2 by 2.2 fold, having a statistically significant difference （P〈0.05） as compared with islets cultured with palmitate alone. The cell viability was not affected.Conclusion The protective effects of rosiglitazone on insulin secretion of isolated pancreatic islets under chronic exposure to palmitate might be mediated through the downregulation of UCP-2 expression.

关键词： rosiglitazone fatty acids uncoupling protein 2

二维光子晶体中Grover搜索算法的实现(英文)

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量子光学学报 2006年第1期12卷 31-35页

作者：张文弘清华大学物理系量子信息与测量教育部重点实验室北京100084

最近,Angelakis等人将光子晶体引入量子计算。本文主要讨论在二维光子晶体中两比特Grover搜索算法的实现。沿用由Angelakis等所提出的量子比特与可控相位门,简单有效的实现了Grover算法。具体的实现方案文中将详细讨论。

关键词：光子晶体耦合腔波导(CCW) Grover算法

A common variation within the STEAP4 gene exons is associated with obesity in Uygur general population

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Chinese Medical Journal 2011年第14期124卷 2096-2100页

作者： GUO Yan-ying LI Nan-fang ZHOU Ling YAO Xiao-guang WANG hong-mei zhang Ju-hong LUO wen-li Hypertension Center People's Hospital of Xinjiang Uygur Autonomous Region Hypertension Institute of Xinjiang UrumqiXinjiang 830001China

Background Coordinated regulation of nutrient and inflammatory responses by six transmembrane epithelial antigen of prostate 4 （STEAP4） was essential for metabolic homeostasis. STEAP4 expression in human white adipose tissuewas associated with obesity. This study aimed to evaluate association between STEAP4 genetic polymorphisms and obesity in Uygur Chinese general *** The functional regions of STEAP4 gene were sequenced in 96 Uygur with obesity （body mass index （BMI）〉30 kg/m2）. Representative variations were selected according to the function and linkage disequilibrium and genotyped in 1507 obesity （BMI ≥25 kg/m2） and 825 non-obesity control （BMI ＜25 kg/m2）, all of whom were selected from epidemiology study of obesity-related diseases during January to February 2007 among Uygur population in Hetian area of Xinjiang Uygur Autonomous *** Fourteen novel and 6 known single nucleotide polymorphism （SNPs）, including 2 nonsynonymous SNPs （nsSNPs）, in the STEAP4 gene were identified. Of the 3 representative SNPs, the nsSNP rs1981529 （Gly75Asp, 224A/G）was significantly associated with obesity phenotype （additive P/Pc=0.001/0.006, dominant P/Pc=0.003/0.018, odds ratio （OR） and 95％ confidence interval （CI） adjusted for age, gender and drinking 0.755 （0.641-0.890） and 0.750（0.621-0.907）, respectively）. By the multiple linear regression analysis, the quantitative phenotypes of BMI （P/Pc=0.002/0.004） and waist circumference （P/Pc=0.004/0.008） were found to be significantly associated with the genotypes of rs1981529 （Gly75Asp, 224A/G） in Uygur general population, and effect size （beta value） of one allele G of rs1981529 （Gly75Asp, 224A/G） was-0.553 kg/m2 for BMI and -1.311 cm for waist circumference after controlling age,gender and drinking *** The present study shows an association of the common variation rs1981529 （Gly75Asp, 224A/G） in the STEAP4 gene with obesity in Uygur general population. Further studies should replicate the results

关键词： genetic epidemiology genetic association study obesity Uygur

Sequence-activated chemiluminescence probes: programmable illumination for high-contrast in vivo sensing and imaging

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Science China Chemistry 2025年第1期68卷 26-34页

作者： Yutao zhang Juan Li Wei-hong Zhu Zhiqian Guo Shanghai Key Laboratory of Functional Materials Chemistry Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology State Key Laboratory of Bioreactor Engineering Shanghai Frontier Science Research Base of Optogenetic Techniques for Cell MetabolismEast China University of Science & Technology

Sequence-activated chemiluminescence(CL) technique offers a unique approach to detecting specific biomolecules or cellular events with high sensitivity and spatial resolution. The fundamental principle behind sequence-activated CL probes involves tailoring highly-controllable CL signals in response to specific sequences or events of interest, thus enabling high-contrast signals under complex physiological conditions. This sequential activation could be triggered by enzymes, reactive oxygen species(ROS), biothiols or changes in the microenvironment. These unique sequence-activated CL probes bestow several advantages, including minimal background, deep-tissue penetration, and the ability of non-invasive or minimally invasive detection. The sequence-activated CL techniques represent a significant advancement in molecular imaging and diagnostics. In this mini-review, we focus on the latest developments in sequential CL probes, addressing the technical challenges and discussing the future trajectory by harnessing CL signaling and molecular recognition.

关键词： chemiluminescnece sequence-activation in-vivo bioimaging cyclic peroxide

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惰性介质对钝感炸药爆轰的约束效应

爆炸与冲击 2014年第3期34卷 300-306页

作者：于明张文宏于恒北京应用物理与计算数学研究所北京100094

首先用改进冲击波极曲线理论分析惰性介质对钝感炸药爆轰的约束作用类型。改进冲击波极曲线基于爆轰ZND模型建立在前导冲击波上,并且未反应炸药采用JWL状态方程,惰性介质采用p(ρ,T)形式状态方程。理论考察声速小于炸药CJ爆速且压缩性... 详细信息

首先用改进冲击波极曲线理论分析惰性介质对钝感炸药爆轰的约束作用类型。改进冲击波极曲线基于爆轰ZND模型建立在前导冲击波上,并且未反应炸药采用JWL状态方程,惰性介质采用p(ρ,T)形式状态方程。理论考察声速小于炸药CJ爆速且压缩性不同的6种典型惰性介质约束情况。然后用带三项式Lee-Tarver化学反应率的二维Lagrange流体力学方法数值模拟考察约束相互作用。数值考察约束介质的影响因素有:压缩性、厚度、典型双层介质组合约束。从数值结果看出,由介质压缩性的不同给出的约束作用方式共7种:其中6种出现在介质声速小于炸药CJ爆速条件下,可运用冲击波极曲线理论;另外一种出现在介质声速大于炸药CJ爆速条件下,不能使用冲击波极曲线理论。同时,介质厚度、双层介质组合方式也能够影响爆轰前导冲击波阵面形状以及爆轰化学反应流动状态。

关键词：爆炸力学约束效应改进冲击波极曲线惰性介质钝感炸药唯象化学反应率

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网络社群的组织特征及其社会影响

江苏行政学院学报 2011年第4期 68-73页

作者：张文宏上海大学社会学系上海200444

网络社会群体具有互动过程的超时空性与开放性、行动空间再生产中的虚拟性、社会关系的平等性与自主性、秩序建构中的扁平化与多中心性、社群交往纽带的网缘化、群体成员的异质性较高和群体边界模糊等社会组织特征。其社会影响力主要表... 详细信息

网络社会群体具有互动过程的超时空性与开放性、行动空间再生产中的虚拟性、社会关系的平等性与自主性、秩序建构中的扁平化与多中心性、社群交往纽带的网缘化、群体成员的异质性较高和群体边界模糊等社会组织特征。其社会影响力主要表现为在互动基础上传播信息、提供工具性支持和情感性帮助、以弱关系为基础进行强社会动员、以舆论聚焦为基础开展双向和多向互动。

关键词：网络社群组织特征社会影响