第一步

It is a difficult problem for a big prime integer, if we select a primitive root according to its definition the performance of the secret communication could be affected seriously since the operation cost is very high. So this paper presents and proves an algorithm for searching a primitive root with high efficiency and gives the design of flow and corresponded JAVA program.

第一步：随机选取大素数P和在GF上的本原根g，并将P和g作为公开信息；第二步：用户A想和用户B建立保密通信时，就要交换共享的密钥KAB，A随机选取整数XA(1≤XA≤P-1)，并且计算出YA=gXAmodP经共用信道传给B，将XA保密；第三步：用户B随机选取一整数XB(1≤XB≤P-1)，计算出YB=gXBmodp，也经共用

The invention relates to a method for treating gaseous VOCs by a solid extraction-electro-catalytic oxidation method and a device thereof. The method has the steps that: firstly, an electromagnetic type air compressor is used for controlling the gas flowing velocity by a glass rotameter so as to ensure contaminations in the contamination solution in a gas washing bottle to be stripped into an electrochemical reactor; secondly, microporous aeration heads are distributed in the electrochemical reactor, after being stripped into the electrochemical reactor, the gas is distributed in the electrochemical reactor by the microporous aeration heads, takes parts in the electrochemical reaction and passes through the cathode of absorptive and conductive porous material and the anode of iron sheet in sequence; thirdly, the treated gas finally flows out from the top end of the electrochemical reactor and enters into the gas absorption solution.

本发明涉及一种固态萃取-电催化氧化法处理气态VOCs的方法及装置，方法步骤：第一步，电磁式空压机通过玻璃转子流量计控制气体流速，将气体洗瓶中的污染物溶液中的污染物吹脱进电化学反应器；第二步：电化学反应器中布有微孔曝气头，气体吹脱进入电化学反应器后，通过微孔曝气头分布于电化学反应器内，参加电化学反应，依次经过通过吸附性导电多孔材料阴极和Fe片阳极；第三步，经处理后的气体最后从电化学反应器顶端流出进入气体吸收溶液。

Firstly based on the theory of Semantic Element and the characteristics of phrases and sentences with prepositions,the Semantic Pattern Bases of English prepositions(special Semantic Element Representation Bases for prepositions) were presented.Then the translation process of prepositions was in two steps.One was getting English complete semantic pattern by semantic analysis based on Semantic Pattern Base,the other was deploying into Chinese complete semantic pattern and Chinese representation.

介词的翻译由两步来实现：第一步基于语义模式库对英语含介词的短语和句子进行语义分析得到英语完整语义模式；第二步基于语义模式库将英语完整语义模式代入展开成为汉语完整语义模式和汉语译文。

What is unusual about step 1 of Natural Turn when it follows the Outside Change?

外侧换步之后的右转步第一步有什么特点？

The first procedure uses the GAMIT software to estimate parameters such as station position and orbital trajectory on a daily basis for a given 24-hour interval from the union of three data sets:(1) the campaign stations,(2) the continuously operating GPS stations in Antarctica,(3) long-running continuous GPS stations around Antarctica. In the second procedure, we combine the daily solutions with global GPS sub-networks (IGS1, IGS2, IGS3), which is provided by Scripps Institution of Oceanography, using the GLOBK software in a "regional stabilization" approach in order to estimate the positions and velocities.

数据处理分为两步，第一步：运用GAMIT软件进行单天解算，估计站位置、轨道等参数，其数据源主要有以下三类：(1) SCAR GPS观测站；（2）南极的连续跟踪站；（3）南极及其周边的部分IGS站；第二步：运用GLOBK软件加入SOPAC（Scripps Orbit and Permanent Array Center）的全球GPS子网（IGS1、IGS2、IGS3）进行全球网平差解算测站位置和速度。

The experimental results from cyclic voltammetry and constant-potential electrolysis show that the mechanism of the reaction was two molecules and three steps electrochemical process with eight-electrons transferred: anion radical arose in the first step; two-electrons were transferred in the second step and accompanied with coupling reaction of radicals and protonation and dehydrate, the main product was azoxybenzene; two-electrons were transferred in the third step, and azobenzene was achieved.

研究结果表明，硝基苯在铂电极上的电还原反应为双分子八电子三步骤电化学过程：第一步反应为准可逆单电子转移步骤，产生阴离子自由基；第二步为二电子转移步骤，并伴有随后的双分子不可逆自由基偶合反应和快速质子化及脱水反应，主要产物为氧化偶氮苯；第三步是二电子转移产生偶氮苯的过程。

The results showed that the synthesis reaction was biphasic, because of the presence of the intermediate product dicalcium phosphate dehydrate. The second step reaction occurred just at the end of the first one and ended rapidly in less than 30s, which was called as explosive reaction. The pseudo-Avrami equation was used to describe the reaction processes.

结果表明，合成过程为生成中间产物二水磷酸氢钙的两步式反应，其中第二步反应在第一步反应结束后才开始，并且在很短的时间内(0s)迅速完成，即发生了&爆炸式&反应，反应过程可用类Avrami方程进行表征。

The demetalation of Ni-OEP in the presence of H2 consists of two steps. The first step is hydrogenation of nickel porphyrin to nickel chlorin, and the second step is decomposition of nickel chlorin and the removal of nickel.

，也有相当一部分镍卟啉发生分解，脱除所配合的金属；镍卟啉的临氢脱金属反应过程分为两步，第一步是卟啉分子中一个吡咯环上的外环双键加氢生成镍卟酚，第二步镍卟酚分解，金属脱除。

In order to utilize lignin effectively, base on the situation in China, the study was carried on systematically, centering around the topic of two step sulfomethylation of the soda lignin of wheat straw (the first step is methylolation, the second is sulfonation) and its application. The main purpose is to develop a heterogeneous catalytic system which not only catalyzes but also homogenizes the lignin molecule in the reaction.

为真正高效利用碱木素，木论文根据我国实情，紧紧围绕着麦草碱木素两步磺甲基化（第一步为羟甲基化，第二步为磺化）及其应用这一主题，以开发出在反应过程中既可催化反应又能使木素分子均一化的多相催化体系为主要目标，系统地展开了研究。

Generally identification of plant species consists of two steps. At first family, genus and species of the specimen are made certain by looking up the tool book whose title is Claves Plantarum Xinjiangensis.

一般来说，植物种的鉴定分为两个步骤，第一步，判断植物标本的科、属和种的地位；第二步，使用《×××植物志》、植物图鉴、模式标本等资料检验上一步得出的结论是否正确。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。