下一代基于策略的网络管理中Ponder语言的性能分析和改进

根据TMF描述的下一代基于策略的网络管理的特点,提出了对高层策略语言的要求：（1）具备一定的分组机制;（2）能够描述流程;（3）支持有限状态机模型,并根据这些要求对目前最有影响力的高层策略语言Ponder的性能特点进行了分析,且针对其缺陷做了改进。最后,通过基于策略的下一代IP计费原型系统的设计和实现,验证了对高层策略语言提出的三项要求的正确性和有效性。     

支持多种访问控制方法和策略继承的授权系统

分布式计算环境下访问控制技术的一种发展趋势是采用集中式的身份与权限管理,即由一专门的系统为企业、机构的各类计算机系统、应用服务系统提供集中的身份与授权策略管理,但这种集中式的授权管理系统在实际应用中也面临一些技术问题,论文提出了一种集中式的授权系统,它通过Manager-Provider（管理者-提供者）架构支持、扩展多种不同的访问控制方法,基于资源策略树定义可继承的授权策略,并提供面向不同访问控制方法的在线授权决策服务。     

贯彻落实科学发展观 促进造纸产业健康可持续发展——在《造纸产业发展政策》发布暨宣贯会上的讲话

阐析了造纸工业的重要地位和制定《造纸产业发展政策》的必要性,重点对《政策》中的几个主要问题进行了说明,并对贯彻执行《政策》提出了要求。     

我国造纸行业环境保护类型区划分及环境政策建议

基于造纸行业现有分区,结合其原料结构和制约因素,将我国划分为8个环境保护类型区,并提出分区环境政策建议,旨在帮助和强化造纸行业环境管理,改善区域环境质量。     

中国造纸工业能耗的现状与分析

介绍了我国的一些能源政策和我国造纸工业能耗的现状,分析了我国单位产品标准煤耗从1985年到2005年能够大幅度下降的原因。对比其他国家的能耗情况,分析我国能耗现状,提出了今后节能的方向。     

积极推行清洁生产 降低“三废”排放

举例说明了国际上先进的排污水平,以此推算我国制定的2010年造纸工业减排任务完成是没有问题的。指出了不同规模企业以及不同制浆方法对废水、废气、废渣的处理方法与处理措施,尤其是较难处理的化机浆废水的治理。     

Influence of variable milk quality premiums on observed milk quality

The objective of this study was to evaluate a premium program for very high quality milk in a US cooperative. Data were available on a monthly basis from a large US milk cooperative from April 1998 through December 2005. The data set consisted of 36,930 observations representing producer-months. The actual amount of the low bulk tank somatic cell count (BTSCC) premium varied from $0.15 per hundred pounds (cwt.) of milk to $1.00/cwt. with steps in between of $0.50 and $0.60 per cwt. of milk during the data collection period. Data analysis was done to evaluate the impact of the premium program on average BTSCC and on the probability of a producer to ship milk with <100,000 cells/mL in a given month. The results showed a strong effect of the premium program on both the average BTSCC and the probability of producing milk with very low BTSCC. On average, the BTSCC of all the milk in the cooperative was reduced by 22,000 cells during the high premium period. The probability of producing milk with BTSCC <100,000 doubled during some months of the high premium period from 4 to 8%, and an associated 10% increase in probability to produce milk below 200,000 cells/mL was observed. The data clearly indicate that premium offerings for very high quality milk affect the overall milk quality in the population affected by the premium. Producers responded to the high premiums and the overall impact on milk quality was substantial. We argue that the combination of a penalty program for high BTSCC milk with a premium program for very high quality milk (low BTSCC) provides a strong incentive for improvement of milk quality.     

电力蓄冷空调技术推广应用问题研究

通过对电力蓄冷空调技术应用现状的深入研究,分析该技术在推广应用巾存在的各种障碍,建议政府安排部分资金用于中央空调蓄冷技术改造,理顺价格机制促进电力蓄冷空调技术推广。国家应通过财政支持鼓励电力蓄冷空调技术的研发和推广,鼓励设计单位主动推荐蓄冷空调技术。     

Analysis of the steady state probability distribution of a manufacturing system under the prioritised hedging point control policy

In order to evaluate the average production cost of a multi-product-type, multi-stage and multi-parallel-machine manufacturing system (denoted as mP/mS/mM), one of the effective ways is to obtain its steady-state probability distribution. Because the two-product-type and multi-parallel-machine system that demand backlog is not allowed can be considered as a basic building block of the mP/mS/mM system, we begin by investigating the method of obtaining its steady-state probability distribution under the prioritised hedging point control policy. Although the shape of the distribution domains of the work-in-process (WIP) levels influences the steady-state probability balance equations, we develop a unified form of the marginal probability balance equations for all the possible shapes of distribution domains, which can be used to calculate the marginal probability distribution for each product type for the two-product-type and multi-parallel-machine system. Furthermore, we extend this analysis method to both the multiple-product-type, multi-parallel-machine, and single-stage system and the more complex mP/mS/mM system, and propose a method to obtain their approximate marginal probability distributions of the WIP levels. Finally, numerical experiments are conducted to verify the accuracy of the proposed method of analysing the steady-state probability distribution of an mP/mS/mM system.     

上海市电力需求与经济政策关系研究

经济发展的周期波动必然引起电力需求的波动。采用上海市经济和电量数据,根据经济变量周期波动理论,结合经济指标与电力需求间的关联分析,对上海市电力需求变化规律进行捕捉,得出各周期内电力需求受经济政策的影响情况,为预测电力需求增长趋势提供理论依据。