Numerical Simulation Based on First Order Difference Scheme for Three Lanes Traffic Flow Model

In this article performs the numerical solution of a three lanes traffic flow model based on a linear velocity-density relationship is studied. A multilane traffic flow with three lanes which is moderated by a system of nonlinear partial differential equation appended with initial and boundary conditions reads as an initial boundary value problem (IBVP). In order to compute the numerical solution, we present the discretization of the considered model which leads to the explicit upwind difference scheme. The numerical simulation of 10km highway of three lanes is performed for 6 minutes using the explicit upwind difference scheme based on artificially generated initial and boundary data. An experimental result for the stability condition of the numerical scheme is also presented by performing numerical experiments. The computed result satisfies some well known qualitative features of the solution

中国金融制度变迁的演化逻辑分析

中国的金融制度由于“国家悖论”、政府效用函数最大化以及政府偏好序列的约束,及各个既得利益集团为获取制度租金而采取的博弈,使政府供给主导型的强制性金融制度变迁具有强势路径依赖的特征,锁定在低效状态。要退出中国金融制度锁定,必须引入新的内生变量和外生变量,实施动态的制度变迁,从而达到高效的路径替代

中国农村信用的演化路径研究

中国农村信用是通过自发的、松散的非正式组织形式实现的,在基于血缘、地缘关系的特殊信任主义系统里,农村信用的实施机制和信用保护机制事实上是在一个关联博弈中进行的。当农村非正式社会结构向正式社会结构转轨时,由于契约的法律执行机制的不完善以及交易范围的扩展诱致的信息不完备和非对称,使得关联博弈和信息完备性的基础逐渐丧失,仅靠声誉和关系交易的维系成本急剧上升,人格化交易面临规模不经济和信用风险的双重约束。教育部人文社科研究基地——中国人民大学财政金融政策研究中心2002～2003年重大项目“入世后我国货币政策的外部环境与现实选择”(02JAZJD790031)的部分研究成果

REMARK ON "A NOTE ON CONVERGENCE OF NEWTON\u27S METHOD"

In our paper, we are giving a new proof of L. B. Rall\u27s theorem. In our proof we assume the open ball U^*={x : ∥x-x^*∥)/(rB^*K)}, (where r is positive real number), where we generalize the radius by (r-√)/(rB^*K), we will show that for the best possible bound for h, r=2

INVESTIGATION OF FLOW BEHAVIOR IN MINIMUM QUANTITY LUBRICATION NOZZLE FOR END MILLING PROCESSES

Minimum quantity lubrication (MQL) is a sustainable manufacturing technique that has replaced conventional flooded lubrication methods and dry machining. In the MQL technique, the lubricant is sprayed onto the friction surfaces through nozzles through small pneumatically-operated pumps. This paper presents an investigation into the flow behavior of the lubricant and air mixture under certain pressures at the tip of a nozzle specially designed for MQL. The nozzle used is an MQL stainless steel nozzle, 6.35 mm in diameter. Computational fluid dynamics is used to determine the flow pattern at the tip of the nozzle where the lubricant and compressed air are mixed to form a mist. The lubricant volume flow is approximately 0.08 ml/cycle of the pump. A transient, pressure-based, three-dimensional analysis is performed with a viscous, realizable k-ε model. The results are obtained in the form of vector plots and flow fields. The flow mixing at the tip of the nozzle is wholly shown through the flow fields and vector plots. This study provides an insight into the flow distribution at the tip of the nozzle for a certain pressure to aid modifications in the design of the nozzle for future MQL studies. It attainable aids to determine the correct pressure for the air jet at the nozzle tip