查询词典 key chains

Key management is the core problem of network system security, which deals with the correlative problems from key being generated to ultimately destroyed; it includes system initialization, key generation, key encasement, key distribution, key storage, key renovation, key destruction, etc. Thereinto key distribution and key storage are the two most intractable taches of key management.

密钥管理问题是网络系统安全中首要的核心问题，它是处理密钥自产生到最终销毁的整个过程中的有关问题，包括系统的初始化，密钥的产生、装入、分配、存储、更新、吊销和销毁等内容，而密钥的分配和存储是密钥管理中最为棘手的两个环节。

Firstly,based on the B.Bowermans result about the rate of convergence in Cesaro sense of certain nonhomogeneous Markov chains which the transition matrices converge,we are to study a certain nonhomogenous Markov chains which the transition matrices average converge to a period strongly ergodic stochastic matrice,and control the average convergenc rate of transition matrices,then we get the rate of convergence in Cesaro sense about the nonhomogeneous Markov chains by used the character of norm and the character of nonhomogeneous Markov chains.It is an extension of a B.

首先在B.Bowerman等人研究转移矩阵列收敛的一类非齐次马氏链，其Cesaro平均收敛的收敛速度基础上，研究转移矩阵列平均收敛到一周期强遍历随机矩阵的一类非齐次马氏链，通过控制转移矩阵列平均收敛的收敛速度，利用矩阵范数的性质、非齐次马氏链的相关性质等，得到该非齐次马氏链转移矩阵Cesaro平均收敛的收敛速度，是B。

By introducing XOR operation and one-way function chains to group key management schemes based on the keys tree, a new group key management scheme based on the keys tree, XOR operation and one-way function chains is proposed. Initialization, member adding and member evicting operations are introduced. The new scheme is compared with three other group key management schemes which are based on the keys tree:SKDC, LKH, and OFT. As far as transmission, computation and storage costs are concerned, the performance of the new group key management scheme is the best.

摘 要：在基于密钥树的组密钥管理方案中引入了XOR操作以及单向函数链，提出了一种新的基于密钥树、XOR操作以及单向函数链的组密钥管理方案，介绍了新方案中初始化、成员加入以及成员退出的操作，将新方案与3种基于密钥树的组密钥管理方案SKDC，LKH，OFT进行了比较，数据表明：就传输、计算以及存储开销而言，新的组密钥管理方案性能最优。

The method includes steps: digital watermark technique is adopted to hide information of key data in not key data codes of compressed image; under protection of digital watermark, using protective backup for key data detects whether normal transmitted key data is correct or not so as to detect error code; carrying out cyclic mutual backup by using macro blocks in same positions in front and back macro block set; embedding coded motion vector in form of digital watermark to DCT transformation coefficient, and ensuring that video data are not influenced as best as one can; when error code occurs, if key data backup is correct, then the backup replaces former key data; otherwise, using mean value of key data in adjacent macro blocks within same frame to replace former key data approximately.

本发明中，采用数字水印技术在压缩图像的非关键数据编码中隐藏关键数据信息；通过数字水印保护下的关键数据保护备份来检测正常传输的关键数据是否正确，由此来检测传输误码；用前后宏块组中相同位置的宏块进行循环相互备份；对运动向量进行编码，然后以数字水印的形式嵌入到相对不重要的DCT变换系数中，同时保证视频数据尽量不受影响；在误码发生时，如果关键数据备份正确，则直接替代原关键数据，否则用同一帧内相邻宏块的关键数据的平均值近似替代原关键数据。

The whole industrial chain and branch chains of circular economy have been planned for Zhenhai chemical park. The branch chains consist of ethane chain, C_1 chain, HC1 chain, H_2chain, NH3 chain and S chain. The concept of equivalent pollutant emission, E, has beenproposed and a reference line based on equivalent pollutant emission has been given and applied to the primary appraisal for Zhenhai chemical park. The whole chain and branch chemical industry chains have been also planned for ZJC group company, which include the industrial chain containing fluorine, the industrial chain of basic chemicals and the industrial chain of petroleum chemical industry.

本文对镇海化学工业区的工业链构建进行了可行性分析；完成了园区工业链的整体规划设计，和包括乙烯工业链、碳一工业链、HCl工业链、H_2工业链、NH_3工业链、S元素工业链在内的6条分链的设计；提出了污染排放当量E_t~′的概念，并将其应用到园区工业链招商的初评，制定了入园参考线；本文在对ZJC集团公司发展现状分析的基础上，根据其物质流和能量流的分析，进行了工业链的总体设计，并对氟化工产业、基础化工产业(包括以合成氨为代表的煤化工、以氯碱生产为代表的盐化工以及硫酸、电石等产业)和石油精细化工产业完成了分链设计，进行了分链的分析，提出了建议。

The plans of the industrial chains for Zhenhai chemical park which represents the mode of individual entity symbiosis in China and for ZJC group company which represents the mode of comprehensive entity symbiosis in China have been studied in this dissertation.The whole industrial chain and branch chains of circular economy have been planned for Zhenhai chemical park. The branch chains consist of ethane chain, C_1 chain, HC1 chain, H_2chain, NH3 chain and S chain. The concept of equivalent pollutant emission, E?

本文对镇海化学工业区的工业链构建进行了可行性分析；完成了园区工业链的整体规划设计，和包括乙烯工业链、碳一工业链、HCl工业链、H_2工业链、NH_3工业链、S元素工业链在内的6条分链的设计；提出了污染排放当量E_t′的概念，并将其应用到园区工业链招商的初评，制定了入园参考线；本文在对ZJC集团公司发展现状分析的基础上，根据其物质流和能量流的分析，进行了工业链的总体设计，并对氟化工产业、基础化工产业(包括以合成氨为代表的煤化工、以氯碱生产为代表的盐化工以及硫酸、电石等产业)和石油精细化工产业完成了分链设计，进行了分链的分析，提出了建议。

To simplify Hu Ying and coworker's mixing model according to the gel's characteristics, and to revise the Flory's physical entanglment elasticity model, a concept of non-gaussian-short chains and interlooping chains is introduced which results, in a super-short and interlooping chains fraction Ψ and the number of effective segment N.

含离子凝胶分子热力学模型则在上述工作的基础上，进一步考虑了大分子网链中离子氛之间的静电排斥作用，并假设凝胶内活动离子的扩散作用服从唐南平衡，导出了新的含离子凝胶的分子热力学模型。

Therefore, from the point of trade society, this paper studies the coordination conditions of several contracts among competitive supply chains by adopting Newsvendor model and game theory. The contracts considered include wholesale price contract, buy-back contract, revenue-share contract, quantity-flexibility contract and sales-rebate contract. According to this paper, trade society can coordinate enterprisers for more profit, acquire the modes of supply chains coordination and obtain the design approach of contracts to coordinate two competitive supply chains.

因此，运用Newsvendor模型和博弈论方法，从行业协会角度研究竞争情况下不同供应链间在批发价合同、回购合同、收益共享合同、数量弹性合同和销售折扣合同下的协调条件，可以为通过行业协会协调增加各方利润，提供协调供应链的具体方式，从而得到协调两条供应链的合同设计方法。

By analyzing the enterprise value chains, we can say that the division, transferring, and conformity of MNCs value chains create intra-firm trade in pursuing international competitive advantage. In order to pursue international competitive advantage, it is the basic reason of the creation intra-firm trade that MNCs recompose their value chains.

从企业价值链的角度分析跨国公司内部贸易的产生，内部贸易实际上是企业为追求国际竞争优势，而将某些关键价值链环节进行分割、在价值增值环节的转移或整合的过程中形成的。

You came when I was happy in your sunshine I grew to love you more each passing day Before too long I built my world around you And I prayed you'd love enough of me to stay If you love me let me know If you don't then let me go I can't take another minute Of a day without you in it If you love me let it be If you don't then set me free Take the chains away That keep me loving you The arms that open wide to hold me closer The hands that run their fingers through my hair The smile that says "hello, it's good to see you" Anytime I turn around to find you there It's this and so much more that make me love you What else can I do to make you see You know you have whatever's mine to give you But a love affair for one can never be If you love me let me know If you don't then let me go I can't take another minute Of a day without you in it If you love me let it be If you don't then set me free Take the chains away That keep me loving you Take the chains away That keep me loving you Loving you

有一天，主人出门去了，叫它照顾孩子。他到了别的乡村，因遇大雪，当日不能回来。第二天才赶回家，狗立即闻声出来迎接主人。他把房门开一看，到处是血，抬头一望，床上也是血，孩子不见了，狗在身边，满口也是血，主人发现这种情形，以为狗性发作，把孩子吃掉了，大怒之下，拿起刀来向著狗头一劈，把狗杀死了。之後，忽然听到孩子的声音，又见他从床下爬了出来，於是抱起孩子；虽然身上有血，但并未受伤。他很奇怪，不知究竟是怎么一回事，再看看狗身，腿上的肉没有了，旁边有一只狼，口里还咬著狗的肉；狗救了小主人，却被主人误杀了，这真是天下最令人惊奇的误会。注：误会的事，是人往往在不了解、无理智、无耐心、缺少思考、未能多方体谅对方，反省自己，感情极为冲动的情况之下所发生。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。