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101.
基于异质交易者假设,讨论了知情交易者和非知情交易者在集合竞价过程中的策略行为;分析了集合竞价过程中引入指示性价格揭示和公开限价指令簿信息对于集合竞价定价效率的影响;最后给出了该文结论的现实意义,并提出了相应的政策建议。 相似文献
102.
彭宏 《电子科技大学学报(社会科学版)》2006,(1)
为了克服入侵检测系统存在着在先验知识较少情况的推广能力差的问题,提出了基于粗糙集理论的入侵检测方法。利用粗糙理论,建立了系统调用短序列的检测模型并应用于sendmail调用序列检测。实验结果表明:它不需要全部的正常和异常的信息,在给出较少的正常和异常调用序列数据的情况下,能得到较为理想的检测效果。 相似文献
103.
104.
New Labour has promoted the use of information and communicationtechnology. Call centres are a key development in this strategyand are now in use for accessing social services. In officialpolicy, the use of call centres is presented as an aspect ofattempts to change the relationship between service users andthe purchasers and providers of services. In contrast, we suggestthat the use of call centres in social care does little to shiftthe balance of power. Call centres bring together four dimensionsof New Labour discourse: learning from the private sector, cuttingcosts, technology and consumerism. Three issues emerge fromtheir development: the undermining of social works senseof place; the circumscribing of service user participation;the rationalization of social workers. The call centre servesas a signifier of what, it is claimed, the combination of NewLabours consumerism and technology can achieve. Thissignification disguises call centres properties of efficiency,calculability, predictability and control. Contrary to the rhetoricthat accompanies them, call centres may be curtailing serviceuser participation, as well as delimiting the social work role.Accordingly, their use has important, but as yet largely unresearched,implications for service users and social workers. 相似文献
105.
针对网络业务的自相似特性,在高斯假设下得到了该特性下的业务排队性能;提出了一种适用于传统业务和自相似业务的呼叫接纳控制算法。仿真表明了该算法具有速度快、参数简单等优点。 相似文献
106.
陶陶 《武汉科技大学学报(社会科学版)》2007,9(3):324-328
探究和理解古代散文的艺术精神和独特文化内涵,可以从原型话语在古代散文审美意识的渗透中找寻其内在话语以及不同的原型话语对散文创作的潜在导引或召唤。本文试图从古代文化的“道”、“物”等原型话语在古代散文中所体现出来的独特精神内涵和审美艺术精神特征等方面作一些分析和论述。 相似文献
107.
Philippe Chevalier Jean‐Christophe Van den Schrieck 《Production and Operations Management》2008,17(3):306-319
Multiple‐skill call centers propagate rapidly with the development of telecommunications. An abundance of literature has already been published on call centers. Here, we want to focus on centers that would typically occur in business‐to‐business environments; these are call centers that handle many types of calls but where the arrival rate for each type is low. To find an optimal configuration, the integrality of the decision variables is a much more important issue than for larger call centers. The present paper proposes an approach that uses elements of combinatorial optimization to find optimal configurations. We develop an approximation method for the evaluation of the service performance. Next, we search for the minimum‐cost configuration subject to service‐level constraints using a branch‐and‐bound algorithm. What is at stake is to find the right balance between gains resulting from the economies of scale of pooling and the higher cost or cross‐trained agents. The article shows that in most cases this method significantly decreases the staffing cost compared with configurations with only cross‐trained or dedicated operators. 相似文献
108.
提出了一种新的适合于当前网络环境,基于客户机/服务器应用方式及远程过程调用(RPC)的分布事务处理模型及其实现协议。分析与实验表明它不仅满足网络中客户机/服务器应用的具体特点与要求,而且可以克服各种两段式提交协议中由于协调者故障造成的阻塞,同时避免了三段式提交等协议为解决阻塞而引起的开销过大,实现复杂等问题 相似文献
109.
以A+H股上市公司为样本,运用加权价格贡献法比较了A股和H股开盘阶段对隔夜信息的揭示效率。研究结果发现,无论是A股还是H股,公司规模越大,开盘阶段的信息揭示效率越高;两市场开放度、成熟度、市场结构和交易机制的区别导致H股开盘阶段的信息揭示效率高于A股。 相似文献
110.
O. Zeynep Akin Nesrin akan Fikri Karaesmen E. Lerzan
rmeci 《Production and Operations Management》2015,24(7):1086-1100
Most service systems consist of multidepartmental structures with multiskill agents that can deal with several types of service requests. The design of flexibility in terms of agents' skill sets and assignments of requests is a critical issue for such systems. The objective of this study was to identify preferred flexibility structures when demand is random and capacity is finite. We compare structures recommended by the flexibility literature to structures we observe in practice within call centers. To enable a comparison of flexibility structures under optimal capacity, the capacity optimization problem for this setting is formulated as a two‐stage stochastic optimization problem. A simulation‐based optimization procedure for this problem using sample‐path gradient estimation is proposed and tested, and used in the subsequent comparison of the flexibility structures being studied. The analysis illustrates under what conditions on demand, cost, and human resource considerations, the structures found in practice are preferred. 相似文献