交换的

With the object of bettering the efficiency of the crossover operator of genetic algorithms, an improved crossover strategy is proposed. The genetic algorithm with this strategy is capable of preventing incest, caducous crossover and, to some extent, premature convergence.

从提高遗传算法交换操作效率的角度出发，提出一种改进交换策略；采用该交换策略的遗传算法可以防止近亲繁殖和失效交换的出现，在一定程度上避免早熟收敛的发生。

After new station just had been done, the site PR of the friend that you can look for you to be familiar with is tall exchange a link with him, do not know who does impossibly also with you, this I am to have the same feeling greatly, when I stand newly, be in stationmaster group in call commutative link every day, all the time nobody is willing to be exchanged with you, although stand with what you exchange, his station PR also is 0, if your popularity should grasp an opportunity only so very much, believe you also can find the site with tall PR to exchange.

新站刚做好以后，你可以找你熟悉的朋友的站点PR高的和他交换链接，不认识的谁也不可能和你做的，这个我是深有同感，我新站的时候在站长群里天天喊交换连接，一直没人愿意和你交换，即使和你交换的站，他的站PR也是0，如果你人缘好那么只要把握住机会，相信你也可以找到PR高的站点来交换。

The purity of SAM product was higher than 95％, and the overall recovery of SAM sulfate and SAM double salt of sulfate and p-tosylate were 60％ and 50％, respectively.

通过筛选，获得了对SAM有较好选择性离子交换能力、较易洗脱和再生的争光D113弱酸型阳离子树脂，研究了温度、pH等对SAM离子交换的影响，根据SAM在弱酸阳离子树脂D113上的等温交换平衡行为表现出较强的可逆性，考虑到交换基的弱电解质性质以及结合Donan膜平衡理论，建立了考虑pH影响的可逆离子交换平衡模型，该模型可以较好地描述SAM平衡浓度、pH对离子交换平衡的影响；通过对动态离子交换过程的研究，得到了SAM在D113树脂内的有效扩散系数的数量级为1.0E-9cm〓/s～1.0E-8cm〓/s。

In this paper, the advances in the research on seawater exchange ability were summarized. The water exchange models and methods were analyzed and compared, and the research hot spot and tendency of water exchange in the field of embayment and artificial reefs in the future were discussed.

文章综述了国内外海水交换能力的研究进展，系统地分析和评价了国内外海水交换的研究方法，提出了海湾水交换以及人工鱼礁区水交换研究的发展趋势，为以后的相关研究提供参考。

The multi-routes k-opt exchange algorithm is firstly proposed, which is the extension in multi-routes of the traditional k-opt exchange algorithm, where the points exchanged are not only the ones in a single route but also in several routes.

本文首先提出了多路径 k-opt交换方法，该方法是传统k-opt交换方法用于多路径间的扩展，其进行交换的点不再局限于单一路径内部，而是多个路径的点都可以参入交换。

The economic exchange is in the controlling position in this kind of labour exchange, and the social exchange is based on the economic exchange.

经济交换在这种劳动交换中占主导地位，社会交换是建立在经济交换的基础之上的。

If two parties want to sign a contract C over a communication network, they must "simultaneously" exchange their commitments to C Since simultaneous exchange is usually impossible in practice, protocols are needed to approximate simultaneity by exchange partial commitments in a piece by piece manner The party of secondly sending commitments may have a slight advantage; a "fair" protocol must keep this advantage within acceptable limits The protocol for signing a contract is improved based on the research result of secure multiparty computation In this protocol, the parties obliviously transfer the signed bit and the committed bit; the other parties can prove the validity of this bit based on the confirming sub protocol, but he cant gain more information about the whole signature by accumulating the signed bit or the committed bit After the parties exchange the whole signed information, they declare the commitment about the signature respectively, and gain the whole signature of the other party At this moment, the party doesnt care about the advance quit of the other party, because he has gained the whole signed information Finally, it is proved that this protocol is quit fairness

在网络环境中解决合同签订问题需要保证信息交换的同时性，以前提出的协议都会给第 2个发送者部分计算特权，利用不经意传输协议则可以解决这个问题在协议执行过程中，参与者将合同的签名位以及他对签名位的承诺不经意传输给对方，对方可以利用验证子协议证明该位的有效性，但是他却不能通过位交换次数的增加获取更多的完整签名的信息；在完成签名位的交换之后，参与者分别宣布承诺，并得到对方对合同的完整签名；在宣布承诺时，协议参与者已经获得全部的签名内容，要么是签名位，要么是对方对该位的承诺，因此参与者并不需要担心对方提前终止协议在文章的最后利用多方安全计算的结论证明了该协议满足终止公平性1 引言两个参与者A和B想要通过网络协商签订合同C 为了保证公平性，参与者必须同时交换自己对合同的签名，然而在实际的网络环境中，想要完全同时地交换对合同的签名是不可能的，他们必须将签名分成若干块依次地执行，以保证大致的同时性但是这种方法依然存在着问题

Besides having a some insight into theinternal structure of operator algebras,it gives a greatimpetus to the development of modern mathematics towords thenon-commutative direction,especially to the developement ofnon-commutative geometry,non-commutative algebraical topologyas well as non-commutative algebraical geometry.

除了反映算子代数自身的内在性质之外，它还对于现代数学朝着非交换的方向发展起着积极的推动作用，特别对于&非交换微分几何&，&非交换的代数拓朴&，甚至&非交换的代数几何&等非交换的数学学科的发展具有重要的影响。

So called "likely is" is for under the seriously restricted condition of simple labor and commodity exchange in the early days, both sides know about the approximate labor amount needed for producing the article for exchanging, so it is relatively easy to realize the equate labor exchange; So called "likely not" is for in the process of developed and complicated commodity exchange, it is very difficult for the dealers to compute the labor amount that includes in the article of other side, so the principle of equate labor exchange actually does not inheres the meaning that prevalently use, the comparing interests principle can be the principle that prevalently use, but the equate labor exchange principle just is a kind of special example of comparing interests principle.

所谓&似是&是因为在初期简单劳动及其商品交换的严格限制条件下，双方都知道要生产所交换的商品需要的大致劳动量，等量劳动交换的实现比较容易；所谓&而非&，则是因为在发达复杂的商品交换中，交换者很难统一计量出对方商品所包含的劳动量，等量劳动交换原则事实上就不具有普遍适用的意义。商品交换的比较利益原则才是普遍适用的原则，等量劳动交换原则只是比较利益原则的一种特例。

The rate constant k ,the activation energy.and induction period of the transestetifieation reaction for the PET/PEN reactive blend were obtained using a kinetic expression based on a second-order reversible reaction mechanism.

根据酯交换反应程度和不同反应温度下的诱导期探讨了酯交换反应与相容性的关系，认为PET与PEN的相容导致或增强了酯交换反应，即相容性是酯交换的必要条件；同时酯交换的发生又促进了PET与PEN的相容。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。