Inference based on adaptive grid selection of probability transforms

Probability transform-based inference, for example, characteristic function-based inference, is a good alternative to likelihood methods when the probability density function is unavailable or intractable. However, a set of grids needs to be determined to provide an effective estimator based on probability transforms. This paper is concerned with parametric inference based on adaptive selection of grids. By employing a closeness measure to evaluate the asymptotic variance of the transform-based estimator, we propose a statistical inference procedure, accompanied with adaptive grid selection. The selection algorithm aims for a small set of grids, and yet the resulting estimator can be highly efficient. Generally, the asymptotic variance is very close to that of the maximum likelihood estimator.     

Risk Assessment for Interconnected Electrical Power Grids

Using an analogy with costs, risk is split into a fixed and a variable contribution. Based on this concept, the total risk of an interconnected electrical power grid is minimized. The theoretical foundations of the method are explained and illustrated by model calculations.     

具有电力存储设备的实时需求响应与能量调度

实时需求响应与能量调度是智能电网中调节电力供需平衡的理想手段,其实施必然对用户的用电行为和电网的运行与管理产生深远影响。本文考虑用户具有多个可充、放电的电力存储设备,兼顾供电商发电量平稳的需求,在社会福利最大化模型的基础上,建立一个实时需求响应与能量调度的优化模型。给出模型的对偶问题,在满足强对偶性的前提下,可以通过求解对偶问题得到原问题的最优解,并确定可供用户与供电商参考的实时电价。在对偶问题中,问题可以分解为用户侧和供电侧两类子问题。进而设计分布式实时需求响应算法,并证明了算法的收敛性,供电侧与用户侧通过信息互动求得最优解。仿真结果验证了模型的合理性和算法的可行性。     

考虑动态损失厌恶的V2G市场交易激励机制设计

为推进V2G服务设想的实现,本文将电动汽车用户的动态损失厌恶特性考虑在内,分析了一般“保底收购,随行就市”市场制度下,电动汽车用户与电网公司间关于V2G服务交易的博弈行为,并提出了相应的激励机制。研究发现:在一般“保底收购,随行就市”市场制度下,电动汽车用户关于V2G服务的行为选择无法满足电网公司关于V2G服务电量的期望;电动汽车用户对V2G服务电量的决策受其对未来交易价格预期的影响,且存在违约风险。鉴于此,文章引入“激励保证金+违约金”的激励机制,并给出了对应的保底价格策略、激励保证金与违约金等策略,以使电动汽车用户的V2G服务选择与电网公司的期望相统一。算例分析结果验证了本文提出的模型与理论分析的可行性。     

县域治理中的“网格赋能”：实践逻辑及现实困境

中西部地区县域网格化管理政策创新与制度环境密切相关。一方面,乡村社会转型中的事务治理困境,要求县级组织积极回应和解决;另一方面,县级条块合作治理机制面临现实难题,需要通过政策创新提高治理能力。中西部地区县级政府引入网格化管理工具,是为了利用网格技术和网格员队伍不断提升部门的回应能力和运动式治理的常规化水平。但是,基层事务属性和技术治理的弊端导致信息生成和入格面临诸多限制,政治、行政与自治的协调困境导致事务治理演变为风险治理。只有构建县域权责协调的协同治理架构,网格化管理工具方能促进基层善治。     

基于智能电网技术的能源网络供应链买电策略研究

智能电网的提出不仅是电网技术本身发展的需要，更是各国能源和经济发展战略层面的需要。可再生能源作为清洁能源的突出代表，其分布式发电系统是智能电网发展的必然趋势。但是，由于天气等因素导致的可再生能源高度不确定性和间歇性却给智能电网系统的稳定带来很大挑战。为了应对这一挑战，并发挥可再生能源的成本优势，本文从微观运营的角度，研究带有可再生能源供给的"多对多"能源网络供应链的买电决策问题，求得能源集成商的最优买电量，以及能源短缺成本、发电厂产能、可再生能源不确定性等参数对最优解的影响。本文发现，发电厂产能对能源集成商使用可再生能源的策略有直接影响。并且，可再生能源产能较大的能源集成商因为规避不确定性风险反而会提高买电量。本文的结论能帮助智能电网节省用电成本，为实现节约型、可靠型和稳定型电网系统提供一定参考。     

Power planning in ICT infrastructure: A multi-criteria operational performance evaluation approach

It is critical for information and communications technology (ICT) companies to carry our effective power planning, in order to support the growing number of services they provide, and this traditionally relies on the tacit knowledge and experience of senior staff. The loss of such domain knowledge resulting from the retirement of staff is an important issue for organizations such as Chunghwa Telecom (CHT), the largest ICT operator in Taiwan. This study thus develops a systematic power planning model using a multi-criteria operational performance evaluation. A group version of the fuzzy repertory grid and fuzzy TOPSIS approaches is applied to elicit a set of evaluation criteria that senior staff agree on, and then the priorities of the telecom rooms are evaluated against this. In addition, a new factor, reflecting the attitudes of the decision makers with respect to the degree of strictness, is defined to determine the superiority and inferiority of each alternative compared to the others. Furthermore, a novel decision aggregation strategy regarding the degree of variation among decision makers is proposed, and a quantitative assessment is carried out to analyze its impact on the ranking results in an objective manner. The proposed model may help ICT organizations to more effectively manage their power resources, and thus obtain competitive advantages.     

基于XML的企业ERP商务智能系统研究

扩展标记语言（Extensible Markup Language，XML）是一种简单的用来描述数据及数据存储的语言，由万维网协会创建，用来克服HTML语言的局限性，论文就XML在企业ERP系统商务智能实现过程中的应用进行了探究，并最终形成模型。     

基于网格技术的高校图书馆信息资源共享系统研究

网格(Grid)技术是构筑在互联网上的一组新兴技术,将网格技术应用于高校图书馆将是未来高校图书馆的一个发展趋势.针对我国高校图书馆发展现状,建立基于五层沙漏模型和开放网格体系(OGSA)的高校图书馆信息资源共享系统模型和各类保障机制,有利于我国高校图书馆的发展.     

电网企业英语培训的有效途径

在国际化战略的背景下,与电网企业相关的英语培训就必须做到能针对中外企业的特点和需求迅速做出判断并设计出独特地课程方案,着力于追求高品质的教学质量和良好的教学效果,为企业构建语言实际应用的阶梯,切实提高企业员工的语言表达能力,实现国际交往的无障碍沟通。