混合遗传-模拟退火算法在公交智能调度中的应用

公交行车调度是公交企业运营的核心内容，关系到公交企业的经济效益与社会效益。兼顾企业与乘客的利益建立了公交车辆行车计划模型，将遗传算法与模拟退火算法相结合组成混合遗传．模拟退火（GA-SA）算法，并对公交行车调度进行优化。实例仿真计算表明该算法具有比标准遗传算法更好的效率，是优化公交调度问题的一个有效途径。     

优化公共收入结构：财政增收的重要途径之一

当前国家财政承受着各种改革成本的重负和支持发展的迫切要求,适度扩大财政收入规模仍是现阶段必要的选择。近几年来,作为公共收入主要形式的税收收入增长很快,明显超出了GDP的增速。要扩大财政增收,除了继续关注税收以外,各种非税收入也是不可忽视的重要来源。财政增收既要注重结果,更要注重过程,充分考虑各种收入形式对经济效率和社会公平的影响,以避免导向上的畸轻畸重而致使公共政策出现偏颇。应在最小效率损失前提下,最大限度地增加公共收入,促进各种形式的公共收入协调增长。一方面,要进一步完善以税收为主的公共权力收入的稳定增长机制;另一方面,要广开财源,大力挖掘公共产权收入值得高度重视的增长潜力,采取有效措施防止公共产权收入的流失,减少分配不公,增强预算的完整性。     

公共关系案例教学法探讨

公共关系案例教学是一种理论与实践相结合的先进教学方法,具有传统教学法不可比拟的优势,能激发学生学习公共关系理论的主动性、积极性,培养创造性思维,锻炼公共关系的实务技能。要运用好案例教学法,必须注意把握案例教学的基本环节,处理好案例教学与传统教学之间的关系,提高教师和学生的素质。     

椭圆曲线密码体制的研究现状

本文对椭圆曲线密码体制的研究现状进行了概述.首先简述了椭圆曲线密码体制的历史进展和数学基础,而后介绍了椭圆曲线支持的密码体制及其实际应用和相关标准,还分析了椭圆曲线密码体制的攻击现状,最后指出了这种密码体制的研究方向.     

公务员招聘的优化模型

讨论了用人单位在公务员招聘时如何选择自己满意的应聘人员.首先根据专家组对应聘人员综合素质的等级评分,利用偏大型正态分布函数ui(xk)＝1-e(-(xk/λ))2(λ＞0,k＝0,1,2,...,l)来分析专家组对应聘人员的满意度,进而得到应聘人员对用人单位的吸引力,从而建立了一个简单且实用的0-1规划模型.     

A New Threshold Signature Scheme Using Self-Certified Public Keys

To prevent active attack, we propose a new threshold signature scheme using self-certified public keys, which makes use of hash function and discrete logarithm problem. The scheme has less commutnication and computation cost than previous schemes. Furthermore, the signature process of the proposed scheme is non-interactive.     

Efficient Authenticated Key Agreement Protocol Using Self-Certified Public Keys from Pairings

An efficient authenticated key agreement protocol is proposed, which makes use of bilinear pairings and selfcertified public keys. Its security is based on the security assumptions of the bilinear Diffie-Hellman problem and the computational Diffic-Hellman problem. Users can choose their private keys independently. The public keys and identities of users can bc verified implicitly when the session key being generating in a logically single step. A trusted Key Generation Center is no longer required as in the ID-based authenticated key agreement protocols. Compared with existing authenticated key agreement protocols from pairings, the new proposed protocol is more efficient and secure.     

A Role-Based PMI Security Model for E-Government

We introduce the general AC( attribute certificate ), the role specification AC and the role assignment AC. We discuss the rolc-based PMI(Privilege Management Infrastructure) architecture. The role-based PMI(Public-Key Infrastructure) secure model for E-government is researched by combining the role-based PMI with PKI architecture (Public Key Infrastructure). The model has advantages of flexibility, convenience, less storage space and less network consumption etc. We are going to use tbe secure model in the E-government system.     

Incentive Mechanism Design for Public Goods Provision： Price Cap Regulation and Optimal Regulation

This paper studies the mechanism design that induces firms to provide public goods under two regulatory means： price cap regulation and optimal regulation, respectively. We first outline two models of monopoly regulation with unobservable marginal costs and effort, which can be regard as an optimal problem with dual restrictions. By solving this problem, we get the two optimal regulatory mechanisms to induce the provision of public goods. Further, by comparative statics, the conclusion is drawn that the welfare loss as sociated with price cap regulation, with respective to optimal regulation, increases more with increase of the expense of public goods.     

谈图书馆公共关系

阐述了图书馆公共关系的涵义和职能，论述了加强图书馆公共关系的重要性，提出了加强图书馆公共关系的具体做法。