过渡

The security of PKI system itself is especially emphasized during the system design and implementation process, which is in accordance with the pervasive characteristic of PKI. Second, the concept of a Trusted Key Management Center is introduced for the first time. This technology greatly strengthens key management practices and allows for smooth transition from PKI to Key Management Infrastructure . Third, certificate status mechanisms are investigated in depth, and a certificate revocation performance simulation system is devised. All these work will provide guides to practice and employment of PKI applications. Based on time constraints, a new taxonomy for authenticated dictionaries is proposed. Fourth, formal analysis of OCSP protocol is carried out; then an efficient and scalable OCSP system is developed. Fifth, the special requirements caused by the working environments of Wireless PKI are analyzed. Based on communicative hashing and dynamic Merkle hash tree, an efficient certificate status validation method suitable for WPKI is presented. Sixth, one important kind of fair exchange protocols is studied, and a new CEMBS based on RSA cryptosystem is proposed. Afterwards, a novel fair exchange protocol totally based on RSA signature scheme is devised.

在系统设计和实现的过程中，考虑到PKI作为普适性安全基础平台的特点，特别强调PKI系统自身的安全性；第二，首次在PKI系统的设计中提出了"可信密钥管理中心"的概念，这一独特设计大大地强化了密钥管理功能的实施，为PKI向密钥管理基础设施的平滑过渡提供了良好的技术准备；第三，对证书状态验证机制进行了深入研究，设计了证书状态模拟系统，以指导PKI系统和应用的部署和实施；在此基础上，基于时间约束首次给出了认证字典的一种新的分类方法；第四，对OCSP协议进行了形式化分析，设计和实现了一种高效、可扩展的OCSP系统；第五，分析了WPKI工作环境对设计安全基础平台提出的特殊要求，结合无线移动设备的具体特点，基于可交换杂凑函数和动态Merkle杂凑树设计出了一种适用于WPKI环境的高效证书状态查询机制；第六，对一类公平交换协议进行了深入的研究，从设计公平交换协议的密码基础结构出发，提出了一种新型的基于RSA密码体制的高效CEMBS；在此工作的基础上，设计了一种基于RSA密码体制的最优化公平交换协议。

This method is very sensitive and selective for the transition metals.

这种方法是非常敏感和选择性的过渡金属。

Using KI index method can distinguish the extremely lowly metamorphose rock from non-metamorphose rock,and can disti...

使用伊利石结晶度指数法可以将极低级变质与未变质的岩石类型区分开，也可以将极低级变质与浅变质的岩石类型区分开，从而解决了沉积岩与浅变质岩之间过渡岩石类型划分的难题。

Besides, we find that most of vacancy jumps are performed passing through a metastable state.

计算分析表明，空位的绝大多数跳动都是经历过渡态完成的。

Simultaneously took the flower-and-bird painting from finely wrought to the enjoyable style transitional stage, regarding the flower-and-bird painting style development and the picture wind evolution, the Yuan Dynasty water ink flower-and-bird painting in methodicalness, the drawing techniq...

作为花鸟画由工致到写意的风格过渡阶段，对于花鸟画风格与品格的拓展与画风演变，元代的水墨花鸟画在章法、画法、画理的继承与发展中都起到承前启后的作用。

Experimental results were reported here regarding the gas phase conversion of CTC to methyl chloride by using transition metal salt composite catalyst embedded on active carbon.

报道了以活性炭为载体，以过渡金属无机盐为复合催化剂，在气相条件下四氯化碳与甲醇反应制备一氯甲烷的研究结果。

It is at the transition from city to nature, and the gateway building to the bustling metropolitan core.

它是在从城市过渡的性质，以及网关建设繁华的大都市的核心。

All the houese in Hongcun like this, the wall basic are all white but it will have some of sopt grey colour on the bottom of wall and the top of the wall don't have this.looks like the wall getting mildewed. i think maybe because of the sun, because of the building construction,The sun never can shining the bottom of the building. year by year the bottom getting mildewed i think, but just because of this, that is why this building can be so special.

在宏村，所有的房子都想这个样子的，虽然说外墙是白色的，但墙的底部和顶部颜色相差特别大，底部从像发霉的灰黑色过渡到顶部的白色，这也许是因为太阳的关系，因为这样的建筑体系，大部分房屋的底部太阳永远都照射不到，所以底部会发霉，也这是因为这样，这样的建筑才会有特点。

A preparation method of nickel oxide-base cathode of fused carbonate fuel cell is to select alkali earth metal oxide, transition metal oxide and rare-earth metal oxide, mix with carbonyl nickel powder in the proportion of 0.01-15.00 mol%, add assistant and mix even into a slurry; after the slurry is formed into a biscuit by doctor-blade casting, sinter it into a multi-porous nickel plate; dissolve lithium nitrate and cobaltous nitrate with mole ratio of Li:Co-1:1 and citric acid or PVA in the distilled water to make a solution with Li of 0.00-0.5 mol/L; immerse the multi-porous nickel plate or nickel oxide plate in the solution, keep for 10-60 minutes under vacuum below 200 millibar, then dry in an oven at 75 degrees centigrade further transfer to a crucible electric furnace preheated 650 degrees centigrade for keeping the temp.

要約 熔融碳酸盐燃料电池氧化镍基阴极的制备方法属于燃料电池领域。选取碱土金属氧化物、过渡金属氧化物和稀土金属氧化物，按0.01－15.00mol％的比例与羰基镍粉混合，加入助剂，混合均匀成浆料；混合浆料流延成型为素坯后烧结为多孔金属镍板；将摩尔比为Li∶Co＝1∶1的硝酸锂和硝酸钴以及柠檬酸或聚乙烯醇溶于蒸馏水中，制成为0.005－0.5mol/L的溶液；将多孔金属镍板或氧化镍板浸入溶液中，在真空度低于200毫巴下保持10－60分钟；置于75℃的烘箱中烘干，转移至预热到650℃坩埚电炉中保温1－10小时；将此过程重复一次或多次即可。

So this area has mixed features of both Palaearctic realm and Oriental realm.

具有东洋界和古北界两界混杂和过渡的特征。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失