节理岩体的边界元模型及其应用

边界元法广泛应用于岩石力学问题的最大障碍是岩体的非均质及其包含的大量节理断层，本文采用多子域思想结合节理断层的非线性模型较好地解决了这一难题。该法在老厂锡矿的应用较好地解释了该矿采场顶板的冒落机理。     

Prescheduling policy for real-time concurrency control: A performance evaluation

A new priority management policy, aprescheduling policy, is proposed. This policy can be applied on any conventional concurrency control protocol to schedule a real-time transaction. Costly preemption is avoided by the prescheduling policy, and parsing dataset of a transaction is not needed. Three widely used conventional concurrency control protocols (dynamic two-phase locking, basic timestamp ordering, and optimistic) are incorporated with the prescheduling policy to form three real-time concurrency control protocols. Performance of the three protocols is evaluated from three different viewpoints: database management systems, protocols, and transaction. From a database management system viewpoint, we show the prescheduling policy can improve the performance of protocols by raising thevalid ratio and reducingrestart counts. In general, two-phase locking with the prescheduling policy performs the best in most cases and yields the best choice for concurrency control in a real-time application. Deciding factors that affect performance of each protocol are identified from protocol viewpoint. Some suggestions are given for writing a timely transaction from the aspect of transaction viewpoint.     

加脂的化学柔软作用机理

加脂是软革制造过程中最重要的工序。本文建立了一个加脂过程和加脂机理的模型。在该模型中，传统的完全依赖ＰＨ值的观察被扩展，结合了加脂剂与浴液间的相互作用的性能和传送提供润滑作用的中性油组分的乳化剂的作用，并扩展了乳化剂的角色。以这种方式引入的化学柔软作用对革的强度有积极的效果，而相比效应力柔软作用会降低革的强度。     

Finite Element Analysis of a Moving Boundary Value Problem

A finite element formulation and the solution of a set of nonlinear coupled heat and mass transfer equations for a two-phase system with a moving evaporation interface is presented. The interface condition takes into account the moisture transfer balance at the moving boundary. The finite element results were compared with existing results for a single phase system for model validation. In the two-phase system, the movement of evaporation front has an appreciable effect on the temperature and moisture distribution inside the porous medium during drying. The effect of the nondimensional heat of vapourization parameter γ on the evaporation front, temperature and moisture distribution in porous medium was studied. The higher the value of γ, the slower is the movement of the evaporation front. The temperature decreased and the moisture content increased as the nondimensional vapourization parameter γ increased. This model has potential applications in studying the heat and mass transfer characteristics in food and biomaterials.     

小浪底斜心墙堆石坝的地震反应分析

采用等价粘弹性动力有限元模型，结合有效应力法，对黄河小浪底斜心墙堆石坝最终设计断面在淤积后期受地震作用的动力特性进行了分析。分析时考虑了淤积土体内有未消散的超静孔压。结果表明明，坝体受里氏６．５级地震时，下游坝基及上游淤土表层均有一定范围的液化区，由于坝基液化区距坝体较远，因而只影响到坝趾压戗的局部；当坝体受里氏８级地震时，坝趾下游近处的坝基沙砾石处于液化状态，上游库区淤土有较大较范围的液化区，在     

一类连续时间广义边值系统的能控性和能观性

连续时间广义边值系统被描述为Ｅｘ（ｔ）＝Ａｘ（ｔ）＋Ｂｕ（ｔ），Ｖ０ｘ（０）＋Ｖｒｘ（Ｔ）＝ｖ，其中Ｅ是奇异方阵，ｕ（ｔ）满足任意次可微，本文讨论了一类连续时间广义边值系统的有关向内和向外边值过程的两个重要概念，并在此基础上给出了能控性和能观性定义和判别准则．     

抗盐降滤失剂SDX的研究与应用

介绍了抗盐降滤失剂SDX的合成方法与现场应用简况,评价了SDX的抗温、抗盐、防塌及配伍性能。试验结果表明,SDX能耐150℃以上的高温,可抗盐至饱和,具有良好的降滤失和抑制性能,与其它处理剂的配伍性好,适用于各种水基泥浆。     

可行性研究财务评价中利息的计算

介绍了可行性研究财务评价中利息计算的内容和方法。     

连续语音识别系统性能评估软件

本文介绍了以一种比较两个句子的新的有效算法为基础而编制的连续语音识别系统性能评估软件，它通过比较连续语音识别系统输出的若干句子和相应的标准句子，得到系统性能的定量数据。该软件的可靠性得到大量实验验证。     

陕甘宁盆地中部奥陶系风化壳储层特征

陕甘宁盆地中部奥陶系风化壳碳酸盐岩储集层属于古岩溶型,主要储集空间是溶蚀孔洞。本文根据古岩溶成因及发育特征,利用毛细管压力曲线、铸体薄片、阴极发光及物性分析资料,综合研究了碳酸盐岩储层参数及其分布特征,探讨了孔、洞、缝组合关系并划分出4种储层类型,判别了储层的有效性,为天然气勘探及储量计算提供了地质基础资料。