关于N（2,2,0）代数

本文定义了一种新的（２，２，０）型代数（Ｓ，＊，Δ，０），简称为Ｎ（２，２，０）代数。研究了它的基本性质；初步探讨了关于Δ运算幂零和＊运算幂等的Ｎ（２，２，０）代数的特性；证明了：Δ运算幂零时，（Ｓ，Δ，０）构成一个结合的ＢＣＩ－代数；＊运算幂等时，（Ｓ，＊，Δ，０）合一问题是不可判定的。     

多抗甲素对S_（180）荷瘤小鼠红细胞免疫功能的影响

用动物实验方法建立Ｓ１８０荷瘤小鼠模型，观察荷瘤小鼠红细胞免疫功能的改变及多抗甲素对Ｓ１８０小鼠红细胞免疫功能的影响。结果发现：①荷瘤小鼠ＲＢＣ－Ｃ３ｂ受体花环率下降，ＲＢＣ－ＩＣ花环率上升；血清中ＲＢＣ－Ｃ３ｂ受体免疫粘附促进因子活性下降，而抑制因子活性上升。②多抗甲素治疗后，荷瘤小鼠ＲＢＣ－Ｃ３ｂ受体花环率、ＲＢＣ－ＩＣ花环率均明显上升；血清中ＲＢＣ－Ｃ３ｂ受体免疫粘附促进因子活性上升，抑制因子活性下降。提示红细胞免疫功能的检测可作为肿瘤发生发展的指标之一，多抗甲素可恢复和提高荷瘤机体的红细胞免疫功能。     

某高速公路隧道路面隆起开裂病害整治

文章针对某高速公路隧道路面局部隆起开裂情况,采用钻孔取芯等方法对病害进行了分析判断,并给出了相应的处理对策。     

车内耦合声场振动噪声预测研究

建立了轿车车身结构有限元模型、车室声腔声学有限元模型,以及声固耦合模型;进行了车身结构模态分析、车室声腔声学模态分析和耦合声场模态分析.研究了声固耦合系统在发动机和路面激励作用下的车内声学响应,预测了车内振动噪声并分析了车身各板件的声学贡献.据此采取了相应的改进措施后,得到了较好的降噪效果.     

应用CFD软件对发动机气道进行设计优化

发动机进排气系统的气体流动特性复杂,影响发动机的充气效率和换气损失,对发动机的动力性和经济性有重要影响.进气道结构复杂,关键部位尺寸对进气流动影响很大,因此找到这些关键部位并合理修改结构是进气道改进工作的重点.     

Steady state analysis of towed marine cables

Efficient numerical schemes were presented for the steady state solutions of towed marine cables. For most of towed systems, the steady state problem can be resolved into two-point boundary-value problem, or initial value problem in some special cases where the initial values are available directly. A new technique was proposed and attempted to solve the two-point boundary-value problem rather than the conventional shooting method due to its algorithm complexity and low efficiency. First, the boundary conditions are transformed into a set of nonlinear governing equations about the initial values, then bisection method is employed to solve these nonlinear equations with the aid of 4th order Runge-Kutta method. In common sense, non-uniform (sheared) current is assumed, which varies in magnitude and direction with depth. The schemes are validated through the DE Zoysa's example, then several numerical examples are also presented to illustrate the numerical schemes.     

Analysis of Metro ridership at station level and station-to-station level in Nanjing: an approach based on direct demand models

A growing base of research adopts direct demand models to reveal associations between transit ridership and influence factors in recent years. This study is designed to investigate the factors affecting rail transit ridership at both station level and station-to-station level by adopting multiple regression model and multiplicative model respectively, specifically using an implemented Metro system in Nanjing, China, where Metro implementation is on the rise. Independent variables include factors measuring land-use mix, intermodal connection, station context, and travel impedance. Multiple regression model proves 11 variables are significantly associated with Metro ridership at station level: population, employment, business/office floor area, CBD dummy variable, number of major educational sites, entertainment venues and shopping centers, road length, feeder bus lines, bicycle park-and-ride (P&R) spaces, and transfer dummy variable. Results from multiplicative model indicate that factors influencing Metro station ridership may also influence Metro station-to-station ridership, varied by both trip ends (origin/destination) and time of day. In comparison with previous case studies, CBD dummy variable and bicycle P&R are statistically significant to explain Metro ridership in Nanjing. In addition, Metro travel impedance variables have significant influence on station-to-station ridership, representing the basic time-decay relationship in travel distribution. Potential implications of the model results include estimating Metro ridership at station level and station-to-station level by considering the significant variables, recognizing the necessity to establish a cooperative multi-modal transit system, and identifying opportunities for transit-oriented development.     

图的相对结合数与图的结构的两个新结果

在已有研究的基础上，进一步讨论图的相对结合数rb(G)与图的结构的关系，主要得到有关rb(G)=n-6和rb(G)=4-n时的结果。     

减振板在汽车前围板上的应用

为推广减振板在汽车前围板上的应用,选用了以DC06冷轧板为基板的减振板,以某车型前围板为试制对象,综合进行了力学试验、冲压试冲、点焊试验、拔洞试验等性能研究。结果表明,减振板的力学性能与普通汽车用钢板无明显差异;产品设计选型时采用简单平直结构翻边可有效规避冲压时弧度结构翻边而产生的易分层问题;如采用工频焊机需对减振板上下面添加导电旁通来提高导电性,采用中频焊机则不需添加导电旁通,但要使用混合功率模式或双脉冲恒流模式的焊接工艺参数来提高导电性;工频焊接与中频焊接的焊接工艺参数均可形成有效熔核。在此工艺条件下,减振板可用于汽车前围板的应用。     

蒸发冷却空调技术在铁路旅客站房中的应用分析

通过对铁路旅客站房建筑特点及空调系统特点的分析,结合蒸发冷却空调技术节能环保、高效的特点,分析各种蒸发冷却空调系统在不同地域的适应性和设计方法,重点对集中式蒸发冷却空调系统、半集中式蒸发冷却空调系统、蒸发冷却与机械制冷复合空调系统,在铁路旅客站房中的应用按不同季节的运行工况进行了系统地分析研究,将蒸发冷却这项"绿色空调"技术的应用扩展到中湿度地区,为今后中低湿度地区站房空调系统设计提供了新思路。该技术的应用对减少站房建设对环境的影响,降低空调系统运行能耗具有重要意义,符合"绿色站房"的设计理念。