在算法上

In this article,based on the twolevel algorithm of selforganization and by applying the method of combinatorial investment ,we set up GMDHtwolevel algorithm security combinatorial investment prospective proceeds model.

以自组织理论两水平算法为基础，采用组合投资方法，在证券投资GMDH两水平算法预测模型的基础上，建立了GMDH两水平算法的证券组合投资预期收益模

Based on analyzing the problems,we propose an evolutionary algorithm by using niches technology and multi-parent-crossover technology to experiment on complex multimodal function optimization with samples.

在分析了简单遗传算法求解带约束的多峰值函数优化中存在的问题的基础上，提出了利用小生境技术和多父体杂交的演化算法，对复杂的多峰值函数优化问题进行了测试，证实该算法能够快速求出多峰函数的所有全局最优解，而且搜索效率高，达到了令人满意的效果。

In this paper, using time Petri nets as specification models, system functionality and timeliness are first verified. Then a heuristic algorithm is proposed to optimize the system energy, which is driven by subtasks' energy-gradients and can be further simplified in the case that TPNs are composable. The experimental results show that the proposed methods can support the high-level low-power synthesis of real-time systems with results close to the optimum one, but with very low time complexities.

以时间Petri网为模型，验证系统功能性和实时性，在此基础上，提出了一种由子任务的能耗变化率驱动的启发式能耗优化算法，并针对一类特殊形式的网模型———可组合时间Petri网，设计了相应的简化算法·实验说明，上述算法时间复杂度低，且优化效果接近最优值，能够为实时系统低能耗高层综合提供有力支持

In this paper we firstly discuss the general concepts of compter security and cryptology, and then describe the mostly used modern encryption methods and technologies. We detail the advantages and disadvantages of symmetric algorithm, public-key algorithm and one-way hash function. At last we put forward a new block cipher - permutation code, and describe the secret hash digital signature and online electronic contracting with the trusted third party system.

本文首先讨论计算机安全和密码学的一般概念，然后介绍现代加密手段常用的方法和技术，详细讨论了对称加密方法、公开密钥加密方法和单向散列加密方法的优点和不足，进而提出了一种新型的分组加密算法—排列码加密算法，并在此基础上实现了保密散列数字签名算法和有可信第三方参与的网上电子签约。

Then, two new algorithms based on conditional entropy, namely CEBARKCC algorithm and CEBARKNC algorithm, are developed in the thesis.

在上述规律的基础上，论文提出了两个新的基于Rough Set理论的启发式知识约简算法：CEBARKCC算法和CEBARKNC算法。

The examples indicate that the algorithm has strong pertinence and high efficiency, hi the discrete variable optimization, the problem is solved in the relative quotient method On the base of analyzing the relative quotient method, the conjugate gradient direction is used to modify the old search directions, the iterative matrix of the algorithm, and the method to resolve the discrete variable optimization, the relative conjugate difference quotient algorithm is presented.

离散变量优化算法是从相对差商法开始的，在详细分析相对差上法的基础上，用共轭梯度方向修正原有的搜索方向，并对算法的迭代矩阵进行相关的修改，最终形成一种用于求解离散变量优化问题的RCDQ法。

An improved contour line extraction algorithm based on grid sequence is presented in this paper.

在网格序列法的基础上提出了一种改进的轮廓线提取算法———基于区域增长的轮廓线提取算法，该算法采用区域增长的方法来加速搜索边界单元，从而避免了搜索所有的网格单元。

In order to obtain better transparency of images and conveniency of algorithm, embedding modification does not happen on LSB of the pixels but frequency coefficients in new improved EMD method.

此外，该算法的密写嵌入不再发生在原EMD中所选的LSB位上，而是转移到了DCT域中的频率系数上。这使得密写后的密写信息有了更好的透明性，同时还避免了原EMD算法中所需的越界讨论。

Based on the analysis of traditional convex hull algorithm, a new convex hull algorithm is presented, i.e. pyramid algorithm.

在分析传统的凸壳算法的基础上，提出新的凸壳算法，即金字塔算法。

In order to deal with the exchange of different calculating models, the collaborative resource account and collaborative cost object account are established. 3. Based on the multistage ABC calculating model, the dissertation researches the cost-volume-profit analysis, capacity loss analysis and variance analysis methods and their applications. The dissertation founds a multi-product activity-based CVP analysis model with activity capacity constraints, and discusses the solution of the model and its application in production.

在作业成本要素建模的基础上，提出了多阶段作业成本核算模型的建模约束规则，研究了基于规则的作业成本核算模型完整性以及环形分配的检查算法，提出了分配层次概念和环形分配的分配方法，给出了计算当前分配层次的算法和针对模型总体的核算算法，通过设立协作资源账户和协作成本对象账户解决了模型之间的交流。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。