交换

That is, a hacker can produce a valid signature for any message without the signer's secret keys. In chapter 4, we research the digital signature schemes based on quadratic residue problem. We first propose a new and efficient bit perturbation.

第三章第二节，首先分析Harn密钥交换协议的安全性，然后根据数学问题y=g〓 mod p设计两种新的密钥交换协，从而避免了Harn密钥交换协议的不安全因素。Z。

However, the data interchange of different enterprise is not as same as these, because there isnt a standard for a business industry. The information of the enterprise needs to be translated repetitiously, even be handled again and again. These can cause mistakes and reduce the efficiency of information transferring.

而对于企业之间的数据交换，由于现在国内流通行业还没有一个被广泛接受的统一的数据交换标准，这使得企业之间的数据交换困难重重，企业的业务信息在企业的边界处往往要进行多次变换，甚至是重复的人工处理，降低了企业信息的传递效率，并且在这中间也增加了引入错误的可能性。

Because there isnt a standard for a business industry, the information of a corporation needs to be translated repetitiously, even be inputted again. These can cause mistakes and reduce the efficiency of information transferring.We defined a frame for data interchange of different application in the CHAOPI corporation and realized the integration of the storage information system and the headquarter information system.

而对于企业之间的数据交换，由于现在国内流通行业还没有一个被广泛接受的统一的数据交换标准，这使得企业之间的数据交换困难重重，企业的业务信息在企业的边界处往往要进行多次变换，甚至是重复的人工处理，降低了企业信息的传递效率，并且在这中间也增加了引入错误的可能性。

In the heat and mass transfer process between liquid desiccant and air, the flow rate and heat inject/exhaust are both important factors to approach a reversible process.

吸湿性溶液与空气的热质交换过程既有热量的交换又有质量的交换，提高该过程的可逆程度是提高溶液除湿空调系统性能的重要手段。

With the help of its structure, this paper points out that the non-commutative finite solvable subsimple group will necessarily be a qualitative element group. And referring to the nature of qualitative element group, it can be easily identified the conditions that the ordered prime divisors in a solvable initial finite subsimple group should meet. Suppose that G is always a finite group.

利用其结构，指出了非交换可解有限次单群必为质元群，从而利用质元群的性质，可以很容易地初步确定了可解有限次单群的阶中素因子之间所必须满足的条件，主要得到下面的一些结论：定理1 G是非交换的可解有限次单群，则G′是G的唯一的非平凡正规子群，并且G′是初等交换p -群，此时| G |= p~n q，|G′|=p~n，。

The reporter is in Shanghai the discovery on the skill exchange platform of a website, the skill that the white-collar registers is multifarious: Spiccato, photograph makes guitar, all sorts of photography technology, languages, cooking, land belonging to one production unit but enclosed in that of another etc, look from commutative post, the person that exchange commonly decides study place in him home or tea lane.

记者在上海一家网站的技能交换平台上发现，白领登记的技能五花八门：吉他弹奏、照片制作、摄影技术、各种语言、烹饪、插花等，从交换帖上看，一般交换者都把学习地点定在自己家或者茶坊。

Three kinds of BCRC No.51534, 10322 and 10675 would be selected and acted as an experimental sample of Escherichia coli. Results shows that Escherichia coli of No.51534 will appear better performance because the maximum of open circuit voltage, closed current and power density are 1.01V, 22mA and 1342mW/m2, respectively. Concerning the effect of culture time with respect to different phase type on the electricity performance of MFCs, the time points on the intersection between lag phase and logarithmic phase, the middle of point of stationary phase for growth curve of Escherichia coli would appear a good performance of MFCs. In addition, the BCRC No. 51534 Escherichia coli possessing a better performance of MFCs than others would be suggested and applied to further studying. Comparison with the performance of MFCs with respect to electron mediator under different mole number, result shows that electron mediator of methylene blue with 4.63mM would appear a better electricity performance of MFCs than others. Concerning the different material of proton exchange membrane with PTFE-Nafion, Nafion 211, 212 and 117 with respect to the performance of MFCs, result shows that the Nafion 117 applied in MFCs will have a better performance of MFCs than other cases. Finally, the effect of molar concentration on the performance of MFCs would be expected at the studied cases of 0.4M, 0.2M, 0.1M and 0.05M respectively for cathode oxidant, result shows that a good performance of MFCs will happen at the condition of 0.2M. Those observations will be useful to improvement of MFCs in the further study.

於上述电池系统条件下，进行大肠杆菌生长曲线、电子传递介质、质子交换膜、电极与阴极氧化剂对电池电性效能分析；选择编号10322、10675与51534之大肠杆菌为实验菌株，依定量培养之生长曲线取出代表不同时生长特性时期的培养时间，利用亚甲基蓝作为电子传递介质进行实验分析从所测得的电量进行分析，以编号51534之大肠杆菌的微生物燃料电池有最大的开路电压为1.01V及最大闭路电流为22mA；当极化曲线中电压为0.47V、电流为11.4 mA时有最大的功率密度为1342 mW/m2；加以负载有平均工作功率密度294 mW/m2；从生长曲线与电性效能来分析，得知生长曲线的迟滞期与对数期的转变点与静止期的中间点有最佳电性效能表现；对於加入不同莫耳数之电子传递介质methylene blue、neutral red与thionine之电池效能表现，则以加入4.63mM methylene blue电子传递介质的电池有较佳平均功率密度230 mW/m2；另对於质子交换膜PTFE-Nafion、Nafion 211、Nafion 212与Nafion 117之电池效能表现，以Nafion 117质子交换膜的电池有较佳平均功率密度340 mW/m2；对於分析加入不同莫耳数浓度0.4M、0.2M、0.1M与0.05M的阴极氧化剂之电池效能，则以0.2M的阴极氧化剂的电池可得到较佳平均功率密度429 mW/m2。

It was found that sulfuric acid, 2-naphthalenesulphonic acid and sulfurous acid could be effectively separated by competitive exchange adsorption in views of action force difference of the components with the resin. The exchange adsorption dynamic diffusion parameters were calculated with diffusion equation for solids and liquid films, and the rate-determining step was determined. The model of breakthrough curve for the resin bed was suggested, and applied to simulate the breakthrough process for each component.

通过单组分、双组分和多组分平衡数据的测定，发现对于硫酸-萘磺酸-亚硫酸混合体系，可以利用不同组分与树脂作用能的不同，通过竞争交换吸附实现分离；以固相扩散方程和液膜扩散方程对交换吸附动力学参数进行了估算，确定了交换吸附过程的控制步骤；建立了床层穿透曲线模型，并对各组分穿透过程进行了模拟。

Organize a group of friends with similar styles; everyone brings rarely or unworn clothing and walks away with some new styles.

自发组织一个交换自己不需要的衣服交换会，股东一帮女性朋友将自己不穿的衣服和自己的不穿的进行交换。

Cytophaga sp was selected for heparinase production because it was more productive. Three heparinases, named HⅠ, HⅡ and H Ⅲ were purified from the crude cell extract by means of batch DEAE-Cellulose negative adsorption, Hydroxylaptide adsorption and releasing, SP-Sepharose cation exchange chromatography, Source 30S cation exchange chromatography, Poros 20HS cation exchange perfusion chromatography and Sephacryl S200HR gel permeation chromatography.

利用超声破碎、DEAE-纤维素反吸附去杂、羟基磷灰石批处理吸附层析、SP-Sepharose离子交换层析、Source 30S离子交换层析、Porous20HS离子交换灌注层析及Sephacryl S200HR凝胶排阻层析，从噬纤维菌中纯化出三种新的肝素酶。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。