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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

Because the spatial hole burning is much small in MQW lasers, the influence of this gain coupling effect on the threshold gain and frequency shift in MQW lasers will be obliviously.

标 签 半导体激光器空间烧孔分布反馈增益耦合 semiconductor lasers spoilal hole burning distributed feedbeak gain coupling

The magnitude of sliding mode switching gain is the key reason causing system chattering. Self-recurrent wavelet neural networks is used to estimate sliding mode switching gain on-line, which can reduce chattering caused by sliding mode control effectively.

滑模开关增益的大小是造成系统抖振的关键，采用自回归小波神经网络(Self-recurrent wavelet neural networks， SRWNN)在线估计滑模开关增益的大小可以有效降低滑模控制造成的抖振。

Simulation results show that the Filter and VGA system has gain of 6~48 dB, variable gain of 42 dB,6 dB/Step, THD54 dBc at 100 mV peak-to-peak input voltage, IIP3 of-6.35 dBV. The NF is less than 25 dB and current dissipation is 30 mA from 1.8 V voltage supply.

电路的仿真结果表明滤波器和VGA系统的增益为6~48 dB，可变增益为42 dB，6 dB/step，在输入电压峰峰值为100 mV时THD小于-54 dBc，线性度为-6.35 dBV，噪声系数在通带内小于25 dB，消耗电流为30 mA。

The ratio of one-step gain versus loss was 1.826:1. There was only one multiple-step mutation with a double-repeat gain observed at PentaD locus.

只发现1例多步突变，表现为PentaD位点的等位基因的增加2个重复单位。

It includes the following steps: polymerizing 2, 4-dihydroxyl metaphenylene diamine hydrochloride, diamine monomer and dipic acid anhydride to gain the polyimide that contains hydroxy on the molecule chain, making the hydroxyl take esterification reacting with acyl chloride and acrylic acid to gain polyimide photosensitive material that has negative photonasty.

该聚酰亚胺光敏材料以2，4-二羟基间苯二胺盐酸盐，二胺单体和二酸酐为原料进行聚合，得到分子链上含羟基的聚酰亚胺，然后使羟基与丙烯酸及其衍生物的酰氯发生酯化反应，得到具有负性感光性能的聚酰亚胺光敏材料。

Yao Xin says, we are " 3 years 3 paces go " plan: The first year (2007) target, advertisement income and content cost planish; The 2nd year of target, it is to allow cost to last inside below bullish circumstance (include the Olympic Games this distinctive budget), advertisement and " normal content the Olympic Games server bandwidth " planish; The 3rd annual in come true that month gain, realize annual gain end of the year next.

姚欣说，我们是"三年三步走"的计划：第一年(2007年)目标，广告收入和内容成本打平；第二年目标，是在内容成本持续上扬的情况下(包括奥运会这块独特的预算)，广告与"正常内容奥运会服务器带宽"打平；第三年年中实现当月盈利，然后年终实现全年盈利。

But the uncertainty of the gain is proportioned to the certainty of the stake according to the proportion of the chances of gain and loss.

但是根据得与失的机会比例而言，得到的不确定性与付出的确定性是成比例的。

The results showed that organic blend acids preparation improved average daily gain and decreased feed gain ratio,and the effect in the group added 5 g/kg was better;pH in proventriculus decreased along with the increase of organic blend acids preparation added in the basal diet and was relatively stable...

结果表明，饲料中添加有机复合酸化剂能够提高艾维因肉仔鸡日增重、降低料重比，而且以5 g/kg添加组效果最好；其腺胃内pH随有机复合酸化剂浓度的增加而降低，但到第5 d各组达到了相对稳定；饲料中蛋白质的消化率以15 g/kg添加组效果最好，干物质、总能和植酸磷的消化率以5 g/kg添加组最高。

But in the anomalous dispersion regime,the quintic nonlinearity only changes the peak value of the gain spectra and almost does not influence the width of the gain spectra.

在光纤正常色散区，正五阶非线性使增益谱的谱宽和峰值增大；但在反常色散区，五阶非线性仅改变增益谱的峰值，几乎不影响谱宽。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。