Improved area-difference-based recovery information placement

<正> In mobile computing systems,message logging can be used to provide fault tolerance for mobilehosts.Due to the mobility of mobile hosts,their recovery information,including logged messages andcheckpoints,may spread throughout mobile support stations.During recovery,there will be a considerablecost for the collection of recovery information.To speed up recovery and to reduce the failure-freeoverhead,an improved area-difference-based scheme is proposed.It tries to keep recovery informationevenly spreading over an area.Only part of recovery information needs to be migrated for controlling thedistribution of recovery information.To reduce the migration cost,a light-weight migration is also proposed.In the performance study,we give an analysis of the probability that the light-weight migrationtakes place.     

Power law and small world properties in a comparison of traffic city networks

We analyze the statistical properties of the urban public bus networks of two cities (Beijing and Chengdu) in China. To this end, we present a comprehensive survey of the degree distribution, average path length, and clustering of both networks. It is shown that both networks exhibit small world behavior and are hierarchically organized. We also discuss the differences between the statistical properties displayed by the two networks. In addition, we propose a weight distribution approach to study the passenger flow through the public bus networks we considered. A hierarchical structure is observed here also.     

KNIT FABRIC SURFACE PROPERTY AND MOISTURE TRANSFER

This paper deals with the properties of the fabric such as surface compression energy, the thick,ness, surface hairness, compressional resilience and effect of these factors on the moisture transport.In the course of the present investigation, the possibility of expressing the relationship between thethickness and the pressure as a hyperbolic function is considered, and compressional resilience is al-so described by relative compression energy loss. The vapor resistance of fabric in terms of still air layer and mathematical model of vaportranspiration are elucidated and ten samples from various double knit fabrics made on the same ma-chine are tested in this study and a multivariate linear regression model is suggested. It is found thatthe thickness of fabric is the strongest factor in the mathematical model of vapor evaporation.     

城市公共交通客流量预测序列模型

本文通过广州市公交线路调整研究的实践,设计了一套在计算机上实现的简便实用的城市公交客流量预测序列模型。它包括公交出行产生与吸引、公交山行分布和公交线路分配等3个子模型。输入客流调查和线网的有关数据,便得到一系列评价和比较公交线网布局合理与否的统计指标。     

微通道散热器的性能实验

对四种空气冷却的微通道散热器进行了实验研究。结果表明它们在４０℃温升和４９０Ｐａ压差下可传递１．６，４．８和７．４Ｗ／ｃｍ＾２的热流，其中一试件达２８ｗ／ｃｍ＾２（７０℃温升。８７０ＫＰａ压差）。四个试件有很大高宽比通道，分别达１６，２５，５０和６７，可有效地降低压差。实验结果用多孔介质模型进行了处理，表明Ｎｕ－Ｒｅ关系具有Ｎｕ＝ｃＲｅ＾ｎ（ｃ，ｎ是常数）的形式。但ｃ，ｎ随槽宽增大分别增大和减小。     

Inhibition of glucose transport in human erythrocytes by 2,3-dioxoindole (Isatin)

10 mM isatin (2,3-dioxoindole) inhibited glucose influx into human erythrocytes by over 30%. The inhibition is of the competitive type, where the affinity constant (K_t) was increased from 5.71 (control) to 11.11 mM in the presence of isatin with no change in V_max (130 nmol/min/ml packed cells). The observed inhibition of sugar transport by isatin was not mediated through membrane–SH groups accessible to iodoacetate, iodoacetamide, DTNB, DNP or sodium arsenite. Isatin inhibited sugar transport in the presence of 2 mM harmaline, an alkaloid inhibitor of Na⁺, K⁺–ATP_ase activity. The inhibition was non additive which suggests that these two compounds interact with the same or a similar site on the erythrocyte membrane.     

移动电话实时计费系统中主机系统的设计

阐述了主机系统的设计原则．对主机系统的ＣＰＵ数目、内存容量和磁盘存储阵列等主要参数进行了分析，给出了主机系统设计的一个实例。     

灌河口河口演变的遥感图象解译

本文给出了灌河口航空及航天图象解译结果.用航空图象分析了河口两侧岸滩的变迁过程,航天图片分析了口外泥沙的运移特征.航空图象解译结果表明,河口两侧岸线和滩线在逐年蚀退.航天卫星图象解译结果表明,河口东侧自废黄河口向西的泥沙输送趋势十分明显;河口西侧也有自西向东的泥沙流迹象,故认为灌河口泥沙输送方向是由河口东西两侧向河口运移.文中还给出了不同岸段的蚀退速率,提供了卫星和航空图片及其解译图.