检索结果-南通市图书馆

New Explicit Solutions of (1+1)-Dimensional Variable-Coefficient Broer-Kaup System

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2010年第12期 965-970页

作者：闫志莲周建平 School of Mathematics and Physics Anhui University of Technology School of Computer Science Anhui University of Technology

By using the compatibility method, many explicit solutions of the (1+1)-dimensional variable-coefficientBroer-Kaup system are constructed, which include new solutions expressed by error function, Bessel function, expo... 详细信息

关键词： variable coefficient Broer-Kaup system explicit solution symmetry

Coherence migration in high-dimensional bipartite systems

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2022年第6期31卷 228-234页

作者： Zhi-Yong Ding Pan-Feng Zhou Xiao-Gang Fan Cheng-Cheng Liu Juan He Liu Ye School of Physics and Electronic Engineering Fuyang Normal UniversityFuyang 236037China Key Laboratory of Functional Materials and Devices for Informatics of anhui Educational Institutions Fuyang Normal UniversityFuyang 236037China School of Physics and Optoelectronics Engineering Anhui UniversityHefei 230039China

The conservation law for first-order coherence and mutual correlation of a bipartite qubit state was firstly proposed by Svozil′?k et al.,and their theories laid the foundation for the study of coherence migration under unitary *** this paper,we generalize the framework of first-order coherence and mutual correlation to an arbitrary(m■n)-dimensional bipartite composite state by introducing an extended Bloch decomposition form of the *** also generalize two kinds of unitary operators in high-dimensional systems,which can bring about coherence migration and help to obtain the maximum or minimum first-order ***,the coherence migration in open quantum systems is *** take depolarizing channels as examples and establish that the reduced first-order coherence of the principal system over time is completely transformed into mutual correlation of the(2■4)-dimensional system-environment bipartite composite *** is expected that our results may provide a valuable idea or method for controlling the quantum resource such as coherence and quantum correlations.

关键词： first-order coherence mutual correlation coherence migration high-dimensional

Efficient Multiparty-to-Multiparty Quantum Secret Sharing via Continuous Variable Operations

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2007年第12期24卷 3312-3315页

作者：韩莲芳刘益民袁浩张战军 Key Laboratory of Optoelectronic Information Acquisition and Manipulation of Ministry of Education of China School of Physics and Material Science Anhui University Hefei 230039 Department of Physics Shaoguan University Shaoguan

The one-to-multiparty quantum secret sharing scheme [Phys. Rev. A 71 （2005） 044301] proposed recently is extended to a multiparty-to-multiparty case. Furthermore, the continuous variable operations are employed in the extended scheme to replace the specific discrete unitary operations used in the original scheme. The complete randomicity of the continuous variable characterizing the unitary operations can ensure the security of secret sharing. Moreover, the present scheme is compared with the recent similar scheme [Phys. Rev. A 72 （2005） 012304]. It is found that the efficiency of the present scheme is n times of that of the previous one.

关键词： thermoelectric half-Heusler compounds thermal conductivity

Zircon U-Pb geochronologic,geochemical and Sr-Nd-Pb isotope characteristics of the Beidaban granites in the North Qilian Orogenic Belt:Petrogenesis and tectonic implications

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geochimica 2024年第6期43卷 1087-1104页

作者： Tao Yang Zhi-yuan Sun Ming-liang Wang Xiao-qiang Zhu Jing-yu Zhao The First Institute of Geology and Mineral Exploration Gansu Provincial Bureau of Geology and Mineral ExplorationTianshui 741020China School of Resources and Civil Engineering Suzhou UniversitySuzhou 234000China School of Geography and Tourism Anhui Normal UniversityWuhu 241000China

The tectonic evolution and crustal accretion process of the North Qilian Orogenic Belt(NQOB)are still under debate because of a lack of integrated constraints,especially the identifi cation of the tectonic transition from arc to initial *** we present results from zircon U-Pb geochronology,whole-rock geochemistry,and Sr-Nd-Pb isotope geochemistry of the Beidaban granites to provide crucial information for geodynamic evolution of *** U-Pb dating yields an age of 468±10 Ma for the Beidaban granites and most of the Beidaban samples contain amphibole,are potassium-rich,and have A/CNK values ranging from 0.7 to 0.9,illustrating that the Middle Ordovician Beidaban granites are K-rich,metaluminous,calc-alkaline *** geochemical characteristics indicate that the Beidaban granites are transitional I/S-type granitoids that formed in an arc *** isotopic compositions of initial(87 Sr/86 Sr)i values ranging from 0.70545 to 0.71082(0.70842 on average)andεNd(t)values ranging from−10.9 to−6.7(−8.8 on average)with two-stage Nd model ages(T DM2)of 1.74-2.08 Ga suggest that the Beidaban granites originated from Paleoproterozoic crustal *** addition,the initial Pb isotopic compositions(^(206)Pb/^(204)Pb=19.14-20.26;^(207)Pb/^(204)Pb=15.71-15.77;^(208)Pb/^(204)Pb=37.70-38.26)and geochemical features,such as high Th/Ta(17.43-30.12)and Rb/Nb(6.01-15.49)values,suggest that the Beidaban granite magma source involved recycled crustal components with igneous *** on these results in combination with previously published geochronological and geochemical data from other early Paleozoic igneous rocks,we suggest that the timing of the tectonic transition from arc to the initial collision to the fi nal closure of the North Qilian Ocean can be constrained to the Middle-Late Ordovician(ca.468–450 Ma).

关键词： Granitoids Zircon U-Pb dating Sr-Nd-Pb-isotopes Petrogenesis North Qilian Orogenic Belt

搅拌摩擦焊搭接法制备TC4钛合金表面Al涂层及其高温氧化行为

在线全文

学校读者我要写书评

暂无评论

金属学报 2013年第8期49卷 996-1002页

作者：骆蕾沈以赴李博胡伟叶南京航空航天大学材料科学与技术学院南京211100 中国航天科工集团南京晨光集团公司工艺研究所南京210012

采用多道搅拌摩擦焊搭接的固态加工方法,并借助焊后表面铣削加工处理,在TC4钛合金表面制备了厚度约为500μm的Al涂层,并对基板试样和涂层试样在700℃大气环境下进行了高温氧化实验用扫描电镜、能谱分析和X射线衍射分析等手段研究了涂层... 详细信息

采用多道搅拌摩擦焊搭接的固态加工方法,并借助焊后表面铣削加工处理,在TC4钛合金表面制备了厚度约为500μm的Al涂层,并对基板试样和涂层试样在700℃大气环境下进行了高温氧化实验用扫描电镜、能谱分析和X射线衍射分析等手段研究了涂层和界面的微观组织结构,并讨论了界面中间层在高温氧化过程中的相结构演变.结果表明,经过搅拌摩擦焊搭接加工,涂层/基体的界面为富Ti的条带状结构,界面中间层厚度达60μm.在表层富Al组织发生高温氧化及熔化现象的同时,足够厚度的Al涂层可对O的内扩散起到一定阻碍作用,而中间层的Ti和Al二元扩散行为促进了Ti-Al相在界面稀氧环境下的形成,最终起到对基体抗氧化的主要防护作用.高温氧化后表面相组成主要为Al_2O_3,Al_2Ti和Al_3Ti.而界面中间层的Ti-Al相结构呈显著的梯度分布特征.

关键词：钛合金搅拌摩擦焊涂层高温氧化

在线全文

学校读者我要写书评

暂无评论

求解非线性方程组的L-M方法(英文)

数学杂志 2009年第3期29卷 253-262页

作者：蒋利华马昌凤安徽理工大学理学院安徽淮南232001 桂林电子科技大学数学与计算科学学院广西桂林541004 福建师范大学数学与计算机科学学院福建福州350007

本文研究了求解奇异非线性方程组的Levenberg-Marquardt方法的收敛性.利用选取新的迭代参数求解非线性方程组的L-M方法,获得点列的超线性收敛性和二阶收敛性,并把试验结果与文献[19 ,20]的结果进行了比较.

关键词：非线性方程组局部误差界 L-M方法

Tripartite Arbitrary Two-Qutrit Quantum State Sharing

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第5期49卷 1191-1194页

作者： YUAN Hao LIU Yi-Min HAN Lian-Fang ZHANG Zhan-Jun Key Laboratory of Optoelectronic Information Acquisition ＆= Manipulation of Ministry of Education of Chinas School of Physics ＆= Material Science Anhui University Hefei 230039 China Department of Physics Shaoguan University Shaoguan 512005 China Department of Physics and Center for Quantum Information Science National Cheng Kung University Tainan 70101 Taiwan China

A tripartite scheme for securely sharing an arbitrary unknown two-qutrit state is proposed, where two generalized Greenberger-Horne-Zeilinger （GHZ） states serve as the quantum channel linking the three legitimate parties. The quantum information （i.e., the arbitrary unknown two-qutrit state） from the sender can be split in such a way that it can be reconstructed deterministically by any agent via a proper unitary operation provided that both agents collaborates together. Moreover, the generalization of the tripartite scheme to more-party case is also outlined.

关键词： quantum state sharing arbitrary two-qutrit state generalized GHZ state

Detecting katG Drug Resistant Genetic Mutation among pneumoconiosis patients complicated with tuberculosis in Mycobacterium tuberculosis L-forms by PCR-SSCP

在线全文

学校读者我要写书评

暂无评论

Journal of Nanjing Medical university 2006年第6期20卷 392-394页

作者： Jun Lu Zhao Zheng Song Ye Chaopin Li Medical College Anhui University of Science ＆ Technology Huainan 232001 China Department of Rehabilitation Affiliated Hospital of Bengbu Medical College Bengbu 233003 China Wannan Medical College Wuhu 241000 China

Objective：To study the relationship between mutation in the katG gene and drug resistance of INH in Mycobacterium tuberculosis L-forms among patients of pneumoconiosis complicated with pulmonary tuberculosis, and to explore the clinical application of PCR-SSCP. Methods： A total of 52 clinical isolated strains of Mycobacterium tuberculosis L-forms were collected. Mutation in the katG genes was detected by PCR-SSCP and traditional antimicrobial susceptibility test （AST）. Results： The results by AST showed that there were 40 persisters in 52 clinical isolated strains. The drug resistant rate was 76.92%（40/52）, and the gene mutation rate of katG was 57.70%（30/52）by PCR-SSCP, the difference was no quite significance （X^2 = 2.8507, P 〉 0.05）. The coincidence rate of two methods was 75.00% （30/40）. Conclusion： The detectionrate of katG resistant strains in Mycobacterium tuberculosis L-forms was high by PCR-SSCP. The combined application of PCR-SSCP and traditional antimicrobial susceptibility test can improve the detecting rate.

关键词： pneumoconiosis tuberculosis Mycobacterium tuberculosis L-form drug resistance katG PCR-SSCP

The survey of Cryptosporidium infection among young children in kindergartens in anhui province

在线全文

学校读者我要写书评

暂无评论

Journal of Nanjing Medical university 2008年第1期22卷 44-46页

作者： Jun Lua Chaopin Li Shan Jiang Song Yea Department of Laboratory Medicine Medical College Anhui University of Science ＆ Technology Huainan 232001 Anhui province China Department of Pathogenic Organism Wannan Medical College Wuhu 241001 Anhui Province China Department of Mining Engineering Huainan Vocational ＆ Technical College Huainan 232001 Anhui province China

Objective：To study the Cryptosporidium infection among young children in anhui province, and to explore the best way to diagnose the disease. Methods： Stool specimens of 1 204 children were collected; oocysts of Cryptosporidium were identified with auramine O- modified staining, acid-fast staining, safranine T and methylene blue staining, and auramine O-modified acid-fast staining. Results： The detectable rate of Cryptosporidium in four stainings were respectively 2.46%, 1.50%, 1.98% and 3.46%, and there was a higher significant difference in the rate between auramine O-modified acid-fast staining and the others（P 〈 0.005）. The detectable rate was significantly lower in urban children（2.14%, 15/684） than in rural ones（5,19%, 27/520）. Boys and girls had similar detectable rate （1.99%, 24/1 204 vs. 1.50%, 18/1 204）. Cryptosporidium infection was usually subclinical, and its major clinical features included benign diarrhea, mild abdominal pain and nausea. Conclusion：Cryptosporidium infection was relatively common in kindergartens and a higher infection rate was found in rural children. As the majority of the Cryptosporidium infections were subclinical, diagnosis is important although difficult.

关键词： Cryptosporidium children kindergarten