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An N/4 fixed-point duality quantum search algorithm

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中国科学：物理学、力学、天文学英文版 2010年第9期53卷 1765-1768页

作者： HAO Liang1,LIU Dan2 & LONG GuiLu1,3.1Key Laboratory for Atomic and Molecular NanoSciences and Department of Physics,tsinghua university,Beijing 100084,china 2School of Sciences,Dalian Nationalities {3.,Dalian 116600,china 3.5} National Laboratory for Information Science and Technology,Beijing 100084,china 1. Key Laboratory for Atomic and Molecular NanoSciences and Department of Physics Tsinghua University Beijing 100084 China2. School of Sciences Dalian Nationalities University Dalian 116600 China3. Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China

Here a fixed-point duality quantum search algorithm is *** algorithm uses iteratively non-unitary operations and measurements to search an unsorted *** the marked item is found,the algorithm stops *** algorithm uses a constant non-unitary operator,and requires N/4 steps on average(N is the number of data from the database) to locate the marked *** implementation of this algorithm in a usual quantum computer is also demonstrated.

关键词： fixed-point search algorithm duality quantum computing the N4 duality search algorithm

Interannual variability of Antarctic Oscillation and its influence on East Asian climate during boreal winter and spring

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Science china Earth Sciences 2006年第5期49卷 554-560页

作者： FAN Ke1,2,3.& WANG Huijun2 1. Nansen-Zhu International research center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, china 2. Department of Atmospheric Science, Yunnan {3., Kunming 650091, china 3. Graduate {3. of the Chinese Academy of Sciences, Beijing 100049, china 1. Nansen-Zhu International research center Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China 2. Department of Atmospheric Science Yunnan University Kunming 650091 China 3. Graduate university of the Chinese Academy of Sciences Beijing 100049 China

The interannual variability of Antarctic Oscillation (AAO) and its influence on East Asian climate during both boreal winter and spring are addressed. The results show that the positive AAO anomaly decreases the cold activity over East Asia during both boreal winter and spring. AAO-related barotropic meridional teleconnection from Antarctic to Arctic is found through analysis of mean me- ridional circulations. This meridional teleconnection is remarkable over Eurasia during boreal winter and over the Pacific Ocean during boreal spring. The results also show that zonal mean zonal wind at high latitudes in Southern Hemisphere has well positive correlation with that of Eurasia during boreal winter and has negative correlation with Pacific North American teleconnection (PNA) during boreal spring, which again display the meridional teleconnection. Thus, local meridional teleconnection is a possible linkage for interaction of circulations at mid-high latitudes between both hemispheres.

关键词： Antarctic Oscillation, Eurasian west wind, meridional teleconnection, mean meridional circulation.

Entropy product measure for multipartite pure states

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Science china(Physics,Mechanics & Astronomy) 2006年第5期49卷 606-615页

作者： CAO Wancang1,2, LIU Dan2, PAN Feng3.& LONG Guilu2,4 1. Department of Physics, Chifeng College, Chifeng 024001, china 2. Key Laboratory for Quantum Information and Measurements, Department of Physics, tsinghua university, Beijing 100084, china 3. Department of Physics, Liaoning Normal university, Dalian 116029, china 4. Key Laboratory for Atomic and Molecular Nano-Sciences, tsinghua university, Beijing 100084, china Correspondence should be addressed to Long Guilu Department of Physics Chifeng College Chifeng 024001 China Key Laboratory for Quantum Information Measurements Department of Physics Tsinghua University Beijing 100084 China Department of Physics Liaoning Normal University Dalian 116029 China Key Laboratory for Atomic Molecular Nano-Sciences Tsinghua University Beijing 100084 China

An entanglement measure for multipartite pure states is formulated using the product of the von Neumann entropy of the reduced density matrices of the constituents. Based on this new measure, all possible ways of the maximal entanglement of the triqubit pure states are studied in detail and all types of the maximal entanglement have been compared with the result of ‘the average entropy’. The new measure can be used to calculate the degree of entanglement, and an improvement is given in the area near the zero entropy.

关键词： multipartite pure state von Neumann entropy entanglement measure

景德镇艺术职业大学山谷学生公寓,景德镇,江西,中国

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世界建筑 2024年第4期 82-85页

作者： Architectural Design & research Institute of tsinghua university Co., Ltd. 清华大学建筑设计研究院有限公司

景德镇艺术职业大学山谷学生公寓项目核心理念是用最低介入的方式最大程度地保留场地内的自然山水要素,创造低成本的、促进学生社交的立体聚落艺术社区。项目位于校园美丽的茶园和茂密的松林之间,跨越在山谷湿地和小溪之上。从尊重场地... 详细信息

景德镇艺术职业大学山谷学生公寓项目核心理念是用最低介入的方式最大程度地保留场地内的自然山水要素,创造低成本的、促进学生社交的立体聚落艺术社区。项目位于校园美丽的茶园和茂密的松林之间,跨越在山谷湿地和小溪之上。从尊重场地精神的角度出发,景德镇的市井烟火气息、千年茶园的独特风貌,都对设计产生了影响。建筑底层架空,尊重场地自然要素特征。悬挑、斜柱、架空、跨越等低环境影响度的设计方式,解决地形高差、减少土方工程,并最大化保留低洼处的湿地作为整个区域的泄洪通道。

关键词：学生公寓土方工程底层架空尊重要素特征景德镇

APPLICATION OF THE MULTIGRID METHOD IN NUMERICALSIMULATION OF SEDIMENT TRANSPORT

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International Journal of Sediment research 1999年第2期14卷 133-143页

作者： ZHAO Yongqing and FANG HongWei ( Sediment research Lab, tsinghua university, Beijing 100084, {3.)

By combining FAS (Full Approximate Scheme) for nonlinear equations of multigrid method with Finite Volume Method, a plane two-dimensional mathematical model of sediment-transport is presented in this paper The analysis on the efficiency of this model shows that it can reduce the amount of computation greatly. Numerical simulation results of the Yellow River Langdian Water Source Project agree well with the test results of the physical model.

关键词： Multigrid method Mathematical model Sediment transport

The effect of hydrogen on the electronic structure of kink in bcc iron

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Science china(Technological Sciences) 2009年第5期52卷 1212-1218页

作者： CHEN LiQun1,QIU ZhengChen1,YU Tao2 & WANG ChongYu2,3.4 1 College of Sciences,Central South university of Forestry and Technology,Changsha 410004,china 2 Central Iron and Steel research Institute,Beijing 100081,china 3.Department of Physics,tsinghua university,Beijing 100084,china 4 International center for Materials Physics,Chinese Academy of Sciences,Shenyang 110016,china 1. College of Sciences Central South University of Forestry and Technology Changsha 410004 China 2. Central Iron and Steel research Institute Beijing 100081 China 3. Department of Physics Tsinghua University Beijing 100084 China 4. International center for Materials Physics Chinese Academy of Sciences Shenyang 110016 China

The electronic structures of kinks in the [100](010) and 1/2[111](-110) edge dislocations in bcc iron containing hydrogen are investigated by means of the first-principles DMol method and the discrete variational *** effects of hydrogen on the kinks are *** results show that hydro-gen forms weak bonding states with its neighboring host atoms,and since hydrogen draws charge from its neighboring host atoms,the interactions between most of the host atoms are weakened com-pared with those of the corresponding atomic pairs in the clean *** indicates that the migration of kink,*** motion of dislocation,is easier in the doping hydrogen kink than in the clean kink,which may be the solid solution softening effect resulting from the impurity hydrogen.

关键词： electronic structure dislocation kink impurity

Two mode photon bunching effect as witness of quantum criticality in circuit QED

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Science china(Physics,Mechanics & Astronomy) 2009年第12期52卷 1898-1905页

作者： AI Qing1,WANG YingDan2,LONG GuiLu1,3.& SUN ChangPu4 1 Department of Physics,tsinghua university,Beijing 100084,china 2 Department of Physics,{3. of Basel,Klingelbergstrasse 82,4056 Basel,Switzerland 3.tsinghua National Laboratory for Information Science and Technology,Beijing 100084,china 4 Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100080,china 1. Department of Physics Tsinghua University Beijing 100084 China 2. Department of Physics University of Basel Klingelbergstrasse 82 4056 Basel Switzerland 3. tsinghua National Laboratory for Information Science and Technology Beijing 100084 China 4. Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100080 China

We suggest a scheme to probe critical phenomena at a quantum phase transition (QPT) using the quantum correlation of two photonic modes simultaneously coupled to a critical system. As an experimentally accessible physical implementation,a circuit QED system is formed by a capacitively coupled Josephson junction qubit array interacting with one superconducting transmission line resonator (TLR). It realizes an Ising chain in the transverse field (ICTF) which interacts with the two magnetic modes propagating in the TLR. We demonstrate that in the vicinity of criticality the originally independent fields tend to display photon bunching effects due to their interaction with the ICTF. Thus,the occurrence of the QPT is reflected by the quantum characteristics of the photonic fields.

关键词： quantum phase transition photon bunching circuit QED

Propranolol and verapamil inhibit mRNA expression of RyR2 and SERCA in L-thyroxin-induced rat ventricular hypertrophy

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Acta Pharmacologica Sinica 2004年第03期25卷 93-97页

作者： rat ventricular hypertrophy1 Xiao-dong WU2,De-zai DAI2,Qiu-pin ZHANG3.Feng GAO3.research Division of Pharmacology,china Pharmaceutical university 3.aboratorial {3. ofMedicine,Southeast university,Nanjing 210009,china research Division of Pharmacology China Pharmaceutical University Laboratorial center of Medicine Southeast University

AIM: To study the alteration in the mRNA level of cardiac ryanodine receptor 2 (RyR2) and sarco-endoplasmic reticulum Ca2+-ATPase (SERCA) in L-thyroxin-induced hypertrophy. METHODS: L-thyroxin (500 g/kg) daily was injected for 10 d. RT-PCR was used to determine mRNA expression. RESULTS: An increase in the relative amount of RyR2 (111 %) and SERCA mRNA (65 %) expression was observed in the hypertrophied rats (RyR2: 77±11; SERCA: 87±10, n=9) compared with the normal rats (RyR2: 3.±10; SERCA: 53.10, n=9). Propranolol was effective to inhibit the increase in RyR2 (51±7) and SERCA (63.13. mRNA expression in hypertrophied rats, respectively. Verapamil also reduced RyR2 (62±5) and SERCA (75±8) mRNA expression. CONCLUSION: Both RyR2 and SERCA mRNA level in L-thyroxin-induced cardiac hypertrophy was over-expressed and propranolol or verapamil inhibited the alteration.

关键词： heart hypertrophy arrhythmia ryanodine receptors Ca2+-transporting ATPase L-thyroxin propranolol verapamil reversed transcriptase polymerase chain reaction

PROCESS CAPABILITY ANALYSIS AND ESTIMATION SCHEME FOR AUTOCORRELATED DATA

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Journal of Systems Science and Systems Engineering 2010年第1期19卷 105-127页

作者： Jing SUN Shengxian WANG Zhihui FU research center for Contemporary Management,Key research Institute of Humanities and Social Sciences at Universities,School of Economics and Management,{3.,Beijing 100084,P.R.china research center for Contemporary Management Key Research Institute of Humanities and Social Sciences at Universities School of Economics and Management Tsinghua University Beijing P.R. China

Autocorrelation is prevalent in continuous production processes, such as the processes in the chemical and pharmaceutical industries. With the development of measurement technology and data acquisition technology, sampling frequency is getting higher and the existence of autocorrelation cannot be ignored. This paper analyzes five estimation schemes of process capability for autocorrelated data. Comparisons among these schemes are discussed for small sample and large sample. In conclusion, this paper gives a procedure of process capability analysis for autocorrelated data.

关键词： Autocorrelation estimation process capability analysis statistical process control