检索结果-南通市图书馆

Quantum secret sharing between m-party and n-party with six states

在线全文

学校读者我要写书评

暂无评论

Science china(physics,Mechanics & Astronomy) 2009年第8期52卷 1191-1202页

作者： gao ting1,yan fengli2,3 & li youcheng2,3 1 college of Mathematics and information Science,hebei normal university,shijiazhuang 050016,china 2 college of physics and information engineering,hebei normal university,shijiazhuang 050016,china 3 hebei Advanced Thin Films Laboratory,shijiazhuang 050016,china college of Mathematics and information Science Hebei Normal University Shijiazhuang 050016 China college of physics and information engineering Hebei Normal University Shijiazhuang 050016 China hebei Advanced Thin Films Laboratory Shijiazhuang 050016 China

A quantum secret sharing scheme between an m-party group and an n-party group is proposed using three conjugate bases.A sequence of single photons,each of which is prepared in one of the six states,is used directly to encode classical information in the quantum secret sharing *** this scheme,each of all m members in group 1 chooses randomly his/her own secret key individually and independently,and directly encodes his/her respective secret information on the states of single photons via unitary operations,then the last one sends 1/n of the resulting qubits to each member of group *** measuring their respective qubits,all members in group 2 share the secret information shared by all members in group *** renders impossible a Trojan horse attack with a multi-photon signal,a fake-signal attack with EPR pairs,an attack with single photons,and an attack with invisible *** give the upper bounds on the average success probabilities for dishonest agent eavesdropping encryption using the fake-signal attack with any two-particle entangled states.

关键词： quantum secret sharing security EPR pairs

Optimal controlled teleportation via several kinds of three-qubit states

在线全文

学校读者我要写书评

暂无评论

Science china(physics,Mechanics & Astronomy) 2008年第10期51卷 1529-1556页

作者： gao ting1,2, yan fengli2,3 & li youcheng3 1 college of Mathematics and information Science, hebei normal university, shijiazhuang 050016, china 2 Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany 3 college of physics and information engineering, hebei normal university, shijiazhuang 050016, china college of Mathematics and information Science Hebei Normal University Shijiazhuang 050016 China Max-Planck-Institut für Quantenoptik Hans-Kopfermann-Str. 1 D-85748 Garching Germany college of physics and information engineering Hebei Normal University Shijiazhuang 050016 China

The probability of successful controlled teleportation of an unknown qubit using a general three-particle state is investigated. The analytic expressions of maximal probabilities via several kinds of tripartite states... 详细信息

关键词： controlled teleportation three-qubit state maximal probability

Quantum nonlocality of generic family of four-qubit entangled pure states

在线全文

学校读者我要写书评

暂无评论

Chinese physics B 2015年第7期24卷 83-87页

作者：丁东何英秋闫凤利高亭 college of physics Science and information engineering Hebei Normal University Department of Basic Curriculum North China Institute of Science and Technology college of Mathematics and information Science Hebei Normal University

We directly introduce a Bell-type inequality for four-qubit systems. Using the inequality we investigate quantum nonlocality of a generic family of states ｜Gabcd〉[Phys. Rev. A 65 052112（2002）] and several canonical four-qubit entangled states. It has been demonstrated that the inequality is maximally violated by the so called ＂four-qubit the maximally entangled state ｜Gm〉＂ and it is also violated by four-qubit W state and a special family of states ｜Gab00〉. Moreover, a useful entanglement-nonlocality relationship for the family of states ｜Gab00〉is derived. Finally, we present a scheme of preparation of the state ｜Gm〉with linear optics and cross-Kerr nonlinearities.

关键词： quantum nonlocality Bell-type inequality quantum entanglement

Adsorption and adhesion of blood proteins and fibroblasts on multi-wall carbon nanotubes

在线全文

学校读者我要写书评

暂无评论

Science china(life Sciences) 2009年第5期52卷 479-482页

作者： li DeJun1, YUAN li1, yanG Ying1, DENG XiangYun1, Lü XiaoYing2, HUANG yan2, CAO Zheng2, liU Hao3 & SUN Xueliang3 1 college of physics and Electronic information Science, Tianjin normal university, Tianjin 300074, china 2 State Key Laboratory of Bioelectronics, Southeast university, Nanjing 210096, china 3 Department of Mechanical & Materials engineering, university of Western Ontario, London, ON, Canada college of physics and Electronic information Science Tianjin Normal University Tianjin 300074 China State Key Laboratory of Bioelectronics Southeast University Nanjing 210096 China Department of Mechanical & Materials engineering University of Western Ontario London ON Canada

This article concerns the investigation of blood protein adsorption on carbon paper and multi-wall carbon nanotubes (MWCNTs). Mouse fibroblast cell adhesion and growth on MWCNTs was also studied. The results showed that fibrinogen adsorption on carbon paper was much lower than that on MWCNTs, which means that platelets readily aggregate on the surface of MWCNTs. Mouse fibroblast cells implanted on MWCNTs tended to grow more prolifically than those implanted on carbon paper. The cell concentration observed on MWCNTs increased from 1.2×105/mL for a single day culture to 2×105/mL for a 7-day culture. No toxicity reaction was observed during the culturing period. These results indicated that MWCNTs possessed excellent tissue compatibility.

关键词： multi-wall carbon nanotubes cell adhesion protein adsorption toxicity tissue compatibility

lignin-reinforced PVDF electrolyte for dendrite-free quasi-solid-state li metal battery

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第3期43卷 1006-1016页

作者： Xin-yang Chen Xue-Jie gao Han-yan Wu Yu-Long liu Xiao-Fei yang Run-Cang Sun Center for lignocellulosic Chemistry and Biomaterials College of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian116034China Division of Energy Storage Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China School of Chemistry Northeast Normal UniversityChangchun130024China

Quasi-solid-state lithium metal batteries(QSSLMBs)assembled with polyvinylidene fluoride(PVDF)are a promising class of next-generation rechargeable batteries due to their safety,high energy density,and superior interfacial ***,PVDF has a series of inherent drawbacks such as low ionic conductivity,ease of crystallization,and hydrophobic character that leading to poor cell *** tackle these issues,a lignin-reinforced PVDF electrolyte is proposed in this work to solve these drawbacks of PVDF and enhance the comprehensive performance of *** lithophilic polar groups of lignin can promote uniform deposition of li on the *** with the improved mechanical properties can efficiently prevent li dendrites penetration through the *** addition,more active sites provided by lignin can also enhance li^(+)transport and lead to a faster electrochemical reaction *** from the ingenious design,li symmetric cells with 5%lignin-PVDF quasi-solid-state electrolyte can operate for 900 h at a high current density/capacity of 5 mA·cm^(-2)/5 mAh·cm^(-2),while shortcircuiting occurs after 56 h for the counterpart(pure PVDF).Moreover,a full cell of li/5%lignin-PVDF/LFP cell demonstrates a high capacity of 96.2 mAh·g^(-1)after 2000 cycles at 10 *** work is expected to open up promising opportunities to develop other high-energy/power-density QSSLMBs.

关键词： Quasi-solid-state electrolyte lignin PVDF Dendrite-free li metal battery

Separability criteria via some classes of measurements

在线全文

学校读者我要写书评

暂无评论

Science china(physics,Mechanics & Astronomy) 2017年第10期60卷 1-6页

作者： Lu liu ting gao fengli yan college of Mathematics and information Science Hebei Normal University Shijiazhuang 050024 China college of physics Science and information engineering Hebei Normal University Shijiazhuang 050024 China

Mutually unbiased bases (MUBs) and symmetric informationally complete (SIC) positive operator-valued measurements (POVMs) are two related topics in quantum information theory. They are generalized to mutually unbiased measurements (MUMs) and general symmetric informationally complete (GSIC) measurements, respectively, that are both not necessarily rank 1. We study the quantum separability problem by using these measurements and present separability criteria for bipartite systems with arbitrary dimensions and multipartite systems of multi-level subsystems. These criteria are proved to be more effective than previous criteria especially when the dimensions of the subsystems are different. Furthermore, full quantum state tomography is not needed when these criteria are implemented in experiment.

关键词： entangled states mutually unbiased measurements mutually unbiased bases general symmetric informationally complete POVMs

Entangler and analyzer for multiphoton Greenberger-Horne-Zeilinger states using weak nonlinearities

在线全文

学校读者我要写书评

暂无评论

Science china(physics,Mechanics & Astronomy) 2014年第11期57卷 2098-2103页

作者： DING Dong yan fengli gao ting college of physics Science and information engineering Hebei Normal University Department of Basic Curriculum North China Institute of Science and Technology college of Mathematics and information Science Hebei Normal University

In the regime of weak nonlinearity we present two general,feasible schemes for manipulating photon *** is an entangler for generating any one of the n-photon Greenberger-Horne-Zeilinger(GHZ)*** of the incoming photons with crossKerr media followed by a phase shift gate and a measurement on a probe beam plus appropriate local operations using classical feed-forward of the measurement results allow one to obtain the desired states in a nearly deterministic *** second scheme discussed is an analyzer for multiphoton maximally entangled states,which is derived from the above *** this scheme,all of the 2nn-photon GHZ states can,nearly deterministically,be discriminated.

关键词： entangled photon entanglement generating coherent operations deterministic desired superposition optics

Reconciled estimation of Antarctic ice sheet mass balance and contribution to global sea level change from 1996 to 2021

在线全文

学校读者我要写书评

暂无评论

Science china Earth Sciences 2024年第11期67卷 3562-3578页

作者： Rongxing li Guojun li Gang HAI Huan XIE Yuan CHENG Wei CHEN Xiangbin CUI Minghu DING Chunchun gao Tong HAO Changqing KE Chuanjin li Jin li yan liU Jiangjun RAN Jiawen REN Qiang SHEN Yunzhong SHEN Hongling SHI Songyun WANG Zemin WANG Jingang ZHAN Baojun ZHANG Min ZHONG Chunxia ZHOU Center for Spatial information Science and Sustainable Development Applications Tongji University college of Surveying and Geo-informatics Tongji University Institute for the Conservation of Cultural Heritage School of Cultural Heritage and Information Management Shanghai University college of Resource Environment and Tourism Hubei University of Arts and Science Polar Research Institute of china State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences college of Geodesy and Geomatics Shandong University of Science and Technology School of Geography and Ocean Science Nanjing University Shanghai Astronomical Observatory Chinese Academy of Sciences State Key Laboratory of Remote Sensing Science Faculty of Geographical Science Beijing Normal University Department of Earth and Space Sciences Southern University of Science and Technology State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of Sciences Center for Space Research University of Texas at Austin Chinese Antarctic Center of Surveying and Mapping Wuhan University School of Geospatial engineering and Science Sun Yat-sen University

The Antarctic Ice Sheet（AIS） has been losing ice mass and contributing to global sea level rise（GSLR）. Given its mass that is enough to cause ～58 m of GSLR, accurate estimation of mass balance trend is critical for AIS mass loss monitoring and sea level rise forecasting. Here, we present an improved approach to reconciled solutions of mass balance in AIS and its regions from multiple contributing solutions using the input-out, altimetric, and gravimetric methods. In comparison to previous methods, such as IMBIE 2018, this approach utilizes an adaptive data aggregation window to handle the heterogeneity of the contributing solutions, including the number of solutions, temporal distributions, uncertainties, and estimation techniques. We improved the regression-based method by using a two-step procedure that establishes ensembled solutions within each method（input-output, altimetry, or gravimetry） and then estimates the method-independent reconciled solutions. For the first time, 16contributing solutions from 8 Chinese institutions are used to estimate the reconciled mass balance of AIS and its regions from1996 to 2021. Our results show that AIS has lost a total ice mass of ～3213±253 Gt during the period, an equivalent of～8.9±0.7 mm of GSLR. There is a sustained mass loss acceleration since 2006, from 88.1±3.6 Gt yr-1during 1996–2005 to 130.7 ±8.4 Gt yr-1during 2006–2013 and further to 157.0±9.0 Gt yr-1during 2014–2021. The mass loss signal in the West Antarctica and Antarctic Peninsula is dominant and clearly presented in the reconciled estimation and contributing solutions, regardless of estimation methods used and fluctuation of surface mass balance. Uncertainty and challenges remain in mass balance estimation in East Antarctica. This reconciled estimation approach can be extended and applied for improved mass balance estimation in the Greenland Ice Sheet and mountain glacier regions.

关键词： Antarctic Ice Sheet Ice mass loss acceleration Sea level rise Reconciled estimation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

H.264整像素快速运动估计算法研究

计算机工程与应用 2009年第35期45卷 196-198页

作者：杨云飞韩彦芳张定会李竹上海理工大学光学与电子信息工程学院上海200093 山西师范大学物理与信息工程学院山西临汾041004

通过对H.264参考模型JM11.0中整像素运动估计算法的分析,提出了一种新的快速运动估计搜索算法:基于方向预测的菱形-T形搜索算法(Direction Based Diamond-T Search,DBDTS)。改进算法在保证视频序列各分量信噪比和输出比特率的同时有效... 详细信息

通过对H.264参考模型JM11.0中整像素运动估计算法的分析,提出了一种新的快速运动估计搜索算法:基于方向预测的菱形-T形搜索算法(Direction Based Diamond-T Search,DBDTS)。改进算法在保证视频序列各分量信噪比和输出比特率的同时有效地减少了运动估计时间。分别应用FS、EPZS、UMHexagonS和改进算法对典型序列进行测试。测试结果表明,新算法在保证编码性能的同时,有效地提高了运动估计速度。

关键词： H.264标准块运动估计搜索模型快速搜索算法基于方向预测的菱形-T形搜索(DBDTS)算法