Scheme for Entanglement Concentration of Unknown Multiparticle Greenberger-Horne-Zeilinger or W Class States

We present,two schemes for concentrating unknown nonmaximally entangled Greenberger Horme-Zeilinger(GHZ) or W class states.The first scheme for concentrating the nonmaximally entangled GHZ state is based on linearoptical devices.The second scheme for concentrating the W class states can be applied to a wide variety of atomic state.Both of our schemes are not postselection ones and are within the current technologies.

Scheme for implementing quantum dense coding with W-class state in cavity QED

An experimentally feasible protocol for realizing dense coding by using a class of W-state in cavity quantum electrodynamics （QED） is proposed in this paper. The prominent advantage of our scheme is that the successful probability of the dense coding with a W-class state can reach 1. In addition, the scheme can be implemented by the present cavity QED techniques.

Measure-Resend Semi-Quantum Private Comparison Scheme Using GHZ Class States

Quantum private comparison is an important topic in quantum cryptography.Recently,the idea of semi-quantumness has been often used in designing private comparison protocol,which allows some of the participants to remain classical.In this paper,we propose a semi quantum private comparison scheme based on Greenberge-Horne-Zeilinger(GHZ)class states,which allows two classical participants to compare the equality of their private secret with the help of a quantum third party(server).In the proposed protocol,server is semi-honest who will follow the protocol honestly,but he may try to learn additional information from the protocol execution.The classical participants’activities are restricted to either measuring a quantum state or reflecting it in the classical basis{0,1}.In addition,security and efficiency of the proposed schemes have been discussed.

Quantum correlation of a three-particle-class state under quantum decoherence

We investigate the quantum characteristics of a three-particle W-class state and reveal the relationship between quan- tum discord and quantum entanglement under decoherence. We can also identify the state for which discord takes a maximal value for a given decoherence factor, and present a strong bound on quantum entanglement-quantum discord. In contrast, a striking result will be obtained that the quantum discord is not always stronger than the entanglement of formation in the case of decoherence. Furthermore, we also theoretically study the variation trend of the monogamy of quantum correlations for the three-particle W-class state under the phase flip channel, and find that the three-particle W-class state could transform from polygamous into monogamous, owing to the decoherence.

Scheme for implementing perfect remote state preparation with W-class state in cavity QED

In this paper we present a remote state preparation scheme with a three-qubit W-class state in cavity QED. It has been shown that a special single-qubit state and a special two-qubit entangled state can be remotely prepared perfectly. Furthermore, the classical information cost in this scheme is less than that in the corresponding teleportation scheme and only a single-qubit projective measurement is made by the sender. We also generalize this idea to the multiqubit W-class state.

Deterministic quantum teleportation and information splitting via a peculiar W-class state

In the paper （Phys. Rev. 2006 A 4 062320） Agrawal et al. have introduced a kind of W-class state which can be used for the quantum teleportation of single-particle state via a three-particle von Neumann measurement, and they thought that the state could not be used to teleport an unknown state by making two-particle and one-particle measurements. Here we reconsider the features of the W-class state and the quantum teleportation process via the W-class state. We show that, by introducing a unitary operation, the quantum teleportation can be achieved deterministically by making two-particle and one-particle measurements. In addition, our protocol is extended to the process of teleporting two-particle state and splitting information.

Teleportation of Unknown Atomic Entangled States Using GHZ Class States

We propose two physical schemes, which can teleport unknown atomic entangled states from user A （Alice） to user B （Bob） via GHZ class states as quantum channel The two schemes are both based on cavity QED techniques. In the two schemes, teleportation and distillation procedures can be realized simultaneously. The second teleportation scheme is more advantageous than the first one.

Probabilistic teleportation of an arbitrary GHZ-class state with a pure entangled two-particle quantum channel and its application in quantum state sharing

This paper presents a scheme for probabilistic teleportation of an arbitrary GHZ-class state with a pure entangled two-particle quantum channel. The sender Alice first teleports the coefficients of the unknown state to the receiver Bob, and then Bob reconstructs the state with an auxiliary particle and some unitary operations if the teleportation succeeds. This scheme has the advantage of transmitting much less particles for teleporting an arbitrary GHZ-class state than others. Moreover, it discusses the application of this scheme in quantum state sharing.

Preparation of multi-atom specially entangled W-class state and splitting quantum information

We give a protocol to prepare specially entangled W-class state of multi-atom which can be used to exactly teleport an arbitrarily unknown two-level two-atom state. During the process, the quantum in-formation is split into n parts and the original quantum information can be sent to anyone of the n re-cipients with the other n-1 recipients' collaboration. In addition, we will give a suggestion to realize this scheme via QED cavity.

谁在当中美一流大学校长?——基于统计分析的画像与启示

大学校长担负着领导大学发展的责任。经过对中美两国一流大学校长比较分析发现,两国校长均以男性为主,普遍拥有博士学位和高校工作经历;美国一流大学校长偏向“长者化”,任职年龄、任职年限和退任年龄均明显高于我国;我国一流大学校长尤其是中管高校校长获得最高学位的学科背景主要集中于理工科,而美国一流大学校长尤其是私立大学校长的学历背景则表现为理工科与人文社科各占一半;我国一流大学校长尤其是中管高校校长学缘关系十分明显,晋升方式以内部升职为主,美国一流大学校长则以校外聘任为主;我国一流大学校长尤其是中管高校校长的职业晋升阶梯一般表现为“系主任—院长—副校长—校长”,而美国一流大学校长尤其是公立大学校长的职业晋升阶梯则通常表现为“系主任—院长—教务长或副校长—校长”。对此,我国大学校长选任应反思传统遴选所带来的问题,提高群体结构合理性;完善选任要求,重视多岗位锻炼和跨院校工作经历;打造“选养”并举的选任制度,适度放宽年龄及任期限制。

从“社会”语义变迁看马克思“国家社会”理论的范式革命

深刻把握国家与社会之间关系离不开对“社会”语义的历史考察,事实上,独立完整的“社会”概念的生成经历了一个漫长的过程。古典共同体是“社会”与“国家”的共同源头,工商业活动的扩展造成古典共同体的分殊化,导致了“社会”与“国家”之分。黑格尔从苏格兰常识学派那里转译的市民社会概念抽空人类秩序的应然性规范,突出群体生存生活的实然性纽带。马克思继承黑格尔市民社会概念满足人类需要的设定,悬置“社会”的商业交换特征,把“社会”概念的内核转向生产,以生产力发展水平为尺度展现出“社会”的历史面相。一方面,社会形态反映生产资料所有制形式;另一方面,国家需要维护特定社会形态相连的所有制形式。因此,社会形态和国家性质都具有历史维度,国家与社会之间不是孰强孰弱的静态格局,而是以所有制形式为中轴的“经济基础”与“上层建筑”交互作用的动态进程。“社会”语义的分析表明,马克思真正实现了“国家-社会”理论的范式革命。

Feasible Scheme for Teleportation of an Arbitrary N-Atom State with Thermal Cavity

We present a scheme for teleportation of an arbitrary cavity QED, and show the feasibility in experiment. thermal field, and the fidelity of teleportation is only the success probability reaches 1.0. N-atom state without Bell state measurement in thermal Our scheme is also insensitive to both cavity decay and slightly affected by the experimental errors. In addition,

学生助学金申报管理系统的设计与实现

助学金申报工作是学生资助工作中的重要环节,传统的助学金申报管理工作存在着工作效率低、易出错等问题。文章针对这些问题,设计与实现了学生助学金申报管理系统。在系统的需求分析与设计阶段,使用UML图形构建了系统的主要模型;在系统的实现阶段,使用ASP.NET(C#)完成了学生助学金申报模块和助学金申报审核模块的代码编写。助学金申报管理系统让申报过程实现无纸化,避免了家庭经济困难学生在传统助学金申报中面临的尴尬,有效地提高了工作效率,降低了易错率。

美国密歇根大学经费运行模式研究

美国密歇根大学作为公立常春藤高校,在经费执行、筹措、配置方面形成了成熟的机制,有力支撑了密歇根大学保持世界一流水平。文章通过分析密歇根大学的经费运行理念,经费执行流程,经费筹措主要来源、金额与结构,配置主要去向、金额与结构,以及应对拨款削减挑战的经费策略,得出建立权责分工明确的经费运行机制,尝试更加灵活大胆的筹资方法,重视对教师与学生的经费支持,因时制宜调整经费策略,推进高校经费管理数字化建设,建立向师生、政府、社会负责的经费绩效评价体系等启示。

中国基层社会治理中的士绅传统——基于“国家-社会”互构的视角

“士绅传统”在中国国家治理体系中由来已久,士绅群体一直被认为是传统社会颇具活动能量的特殊阶层,是名副其实的地方权威,是社会的“中间阶层”,构成中国国家治理中的重要一维。纵观士绅的形成和发展,特定时期的确存在“土豪劣绅”现象,但总体而言,士绅充当着沟通国家政权与基层民众的“桥梁”,有效回避或缓冲了因国家与社会相分离而产生的冲突,维系着传统社会基本面的平稳。时至今日,在致力于推进国家治理体系和治理能力现代化的时代语境中,深入发掘士绅传统中的优良因子,一方面可为“中国之治”的纵深推进提供本土化治理经验;另一方面,希冀更好发挥以史鉴今、资政育人作用。

基于W和W-class态信道的概率性受控隐形传态

提出利用三粒子W和W-class态传送一个未知单粒子态从而实现受控量子隐形传态的方案。发送者Alice通过这种信道在Bob的控制下传送一个未知单粒子态给接受者Charlie。详细讨论了该方案,并给出了成功概率。

An approach to formalizing specification-based class testing

This paper presents a framework that can be used to formalize the specification-based single-class test generation process. Object-Z is used to describe both software requirements and the proposed framework. Using this framework, test engineers can automatically get the testing process model during the test generation process. With this model, properties of test cases （ such as relationship between test cases and methods can easily be captured. Furthermore, with the framework, the test process model can be updated automatically with the test generation process. The properties of test cases can then be updated correspondingly. It will greatly facilitate the regression testing. The main contribution of this paper is that it provides an approach to formalizing testing process by extending existing framework to class testing, and a way to represent test cases as multi-part, multi-step, multi-level artifacts.

大学教师的个人发展:美国的理论与实践

个人发展作为大学教师发展不可或缺的组成部分,是大学教师作为自然人、社会人、组织人需求的满足与个体提升的过程。在美国,大学教师的个人发展是教师个体、结构、制度、理论诸多因素的合力所致。美国学者和教育联盟提出不同的个人发展观。个人发展的概念也经历了从服务教学到重视教师个体需求的演变。美国一流大学的教师个人发展兼具组织支持与自主发展相结合、人力资源管理部门为主体的机构合作、专属与依附的两种发展形态等特点。

党的十八大以来中央企业建设世界一流企业的实践探索与基本经验

培育建设世界一流企业是深化国资国企改革的重要内容,是做强做优做大国有资本和国有企业的内在要求,是推动中央企业高质量发展的重要方向。党的十八大以来,国家不断强化和完善推动中央企业建设世界一流企业的顶层设计,系统回答了建设世界一流企业的五个基本问题,即“要不要”的战略方向问题、“为什么”的价值意义问题、“是什么”的基础认知问题、“什么样”的建设标准问题、“如何做”的推进路径问题。在实践中,中央企业建设世界一流企业探索形成了以战略层面导入为引领、以对标管理提升为重点、以示范标杆创建为抓手、以深化国企改革为依托、以完善推进机制为保障的做法,价值创造能力、创新力、现代治理能力、国际影响力和全球竞争力不断增强,初步形成了坚持党的领导、坚持使命驱动、坚持内外兼修、坚持改革创新、坚持问题导向的基本经验和鲜明特征。在新发展阶段,推动中央企业加快建设世界一流企业,需要政府、企业、社会等多方共同发力,从分类分步推进、深化专项行动、构建动态能力、加强评估评价、优化制度供给等多个方面,多措并举推动中央企业朝着世界一流企业方向走深走实走新。

马克思主义国家理论的演进脉络与中国化实践

国家在现代政治经济活动中具有核心地位,但马克思本人并未提供一套完整的国家理论,只是揭示了国家产生的社会基础,指明了源于物质生活和生产关系演进的国家发展方向。基于历史唯物主义方法论,本文聚焦国家和社会关系这一条主线索,系统梳理了马克思主义者从“工具国家”到“主体国家”,再到“关系国家”的演进脉络。这一发展历程表明:国家是社会发展到一定阶段的产物,具体来说是社会分化成阶级之后的产物,阶级性因此成为国家的本质属性。但是,出于维护社会再生产和统治阶级长远利益的需要,国家获得了相对自主性,得以在一定程度上成为公共利益的代表,作为“工具”的国家和作为“主体”的国家从而实现了矛盾的统一。随着生产和社会关系的日益复杂,马克思主义者逐渐摒弃了将国家视为一种“物”和“实体”的做法,提出了关系视角的国家理论,强调基于多元主体的互动关系来理解国家,进一步打破了机械唯物主义国家观。中国的现代国家构建体现了马克思主义国家理论的基本原理,并基于中国实际丰富发展了马克思主义国家理论,其核心是创造条件,不断消除国家和社会的对立关系,实现两者的相互增强。