NUMERICAL MODEL FOR DYNAMIC SIMULATION OF TRAFFIC FLOW

ＮＵＭＥＲＩＣＡＬＭＯＤＥＬＦＯＲＤＹＮＡＭＩＣＳＩＭＵＬＡＴＩＯＮＯＦＴＲＡＦＦＩＣＦＬＯＷＷｕＺｈｅｎｇ；ＺｅｎｇＬｉ－ｎｏｎｇ（ＤｅｐａｒｔｍｅｎｔＡｐｐｌｉｅｄＭｅｃｈａｎｉｃｓ，ＦｕｄａｎＵｎｉｖｅｒｓｉｔｙ，Ｓｈａｇｈａｉ２００４３３，Ｐ...     

胜利油区厚层底水断块油藏水平井经济技术政策界限

厚层底水断块油藏高含水期水平井开发效果既受剩余油富集区大小、油层厚度、水平井水平段长度、水平井在平面上和纵向上位置以及生产压差的影响，更受油价的制约。因此，通过胜利油区实际资料统计分析、数值模拟和解析法以及经济评价综合研究，提出了在当前油价和技术条件下，这类油藏水平井地质设计和生产控制的经济技术政策界限，即水平井平面位置应避开老井水锥半径20m以上；水平段垂向位置应为距油水界面0．7倍的油层厚度；水平段长度一般为200～250m；油层厚度应大于或等于8m；初期生产压差一般控制为0．6～1．OMPa；对于埋藏深度为1500m的油藏，油价从35美元／bb1升到40美元美元／bb1时，单井经济极限采油量从7101t降到6105t。     

Microwave Demulsification in Removing Naphthenic Acids from Diesel Oil

Emulsification is an undesired phenomenon in the refining of highly acidic oil by alkali-washing electro-refining. In this article, a novel microwave method is applied for demulsification in the removing of naphthenic acid from diesel oil. The internal heating is attributed to molecular rotation and ionic conduction. The decrease of interface zeta-potential and the viscosity of diesel oil are responsible for the demulsification with microwave irradiation. The results exhibited that the demulsification rate is maximized when the optimum microwave irradiation power, exposure time, and irradiation pressure for Anshan and Liaohe diesel oil are deemed to be 375 W, 5/6 min and 0.05 MPa, respectively.     

宝钢宽厚板试样剪液压回路及剪切缸剪切能力分析计算

介绍宝钢宽厚板试样剪的主要技术参数、构成及工作原理；着重对主剪切缸液压回路特点进行了分析，对主剪切缸剪切能力进行了详细校核。本文对厚板厂类似的压平机设备的维护及改造也有指导意义。     

Reconfiguration Aspects and a Reconfigurable Outer Block Interleaver for 3G Applications

Reconfiguration concept represents reconfigurable functionalities of the radio interface for mobile radio systems. Particularly for the physical layer, some possible reconfigurable architectures can be identified. We focus on outer interleaving for turbo codes, which can improve their performance in flat Rayleigh fading environment. The larger the number of columns in the outer interleaver, the better is the performance, but with the penalty of more complexity and delay. Furthermore, an incorrect choice of the number of columns can increase the bit and frame error rates. Therefore, it would be advantageous to reconfigure the outer interleaver in different operating environments with the optimum number of columns. Using two different data frame lengths, in this contribution simulation results are presented for the four possible outer block interleaver configurations specified for the 3GPP mobile standard in the case of flat Rayleigh fading channel. It is shown that different operating environments require an optimum number of columns in terms of bit error rate and frame error rate performance. Finally, frame fade duration is considered and the effect of the product of the Doppler frequency with the frame duration on the performance for the four different 3GPP outer block interleaver configurations is discussed. Costas Chaikalis was born in Athens, Greece, on March 7, 1973. He received the B.Sc. degree in electrical engineering in 1995 from Technological Educational Institute of Lamia, Greece. He also received the M.Sc. and Ph.D. degrees from Department of Electronics and Telecommunications, University of Bradford, Bradford, UK in 1999 and 2003, respectively. During his doctoral studies he worked as a Research Assistant for Mobile Virtual Center of Excellence (Mobile VCE), Terminals Group, UK. Since 2003, he is a lecturer in the Department of Electrical Engineering, Technological Educational Institute of Lamia, Greece. His research interests are in all areas of mobile communications but especially in forward error correction coding, reconfigurable (software radio) architectures, cross layer architectures and DSP applications.     

阳极炭块压降测试的方法与分析

本文通过阐述新的阳极炭块测试方法，提出了降低阳极炭块Fe-C压降的思路，并分析了降低阳极炭块压降对我公司经济效益的影响，可供同行参考。     

CSP连铸机大型液压缸的故障分析与改进

论述引进德国SMS连铸机大包托臂液压缸存在的寿命短问题，分析设计制造缺陷．通过增大缸头密封支持面、(φ600)内圆孔倒角、再增加一道软支撑环、缸头导向部分开润滑槽、改进球杆的润滑流道、柱塞杆整体淬火等措施，消除了原来的问题．同时分析了此项改进的技术经济效果．     

Space-time block codes which can be identified as rings

In this paper, we give a general criterion to determine when a complex space-time block code has a ring structure and then we provide a complete list of complex space-time block codes which have ring structures up to size 4.     

Fourth-Order Semi-Compact Scheme for Flow Past a Rotating and Translating Cylinder

In the present investigation, the newly developed Higher Order Semi-Compact (HOSC) finite difference scheme has been tested for its capability in capturing the very complex flow phenomenon of unsteady flow past a rotating and translating circular cylinder. The physical problem has been modeled in stream function and vorticity formulation and the obtained governing equations are transformed into curvilinear coordinates using body fitted coordinate system to enable the developed scheme to handle the non-rectangular geometry of the problem. Qualitative and quantitative comparisons have been done at low-rotation parameters and found that the results obtained are in excellent agreement with the existing literature. Then simulations have been carried out at high-rotation parameters and noticed that the HOSC scheme is able to simulate some of the flow features known experimentally but not simulated numerically to the present date.     

稳定同位素井间示踪技术在深层块状稠油油藏水驱特征研究的应用

经对冷43块深层块状普通稠油水驱注水5个试验井组开展的稳定同位素示踪测试，利用中子活化技术分析样品，采用先进的示踪剂定量分析与流动模拟相互结合的方法，以示踪数值模拟为手段，评价了油井连通、油层平面及纵向上的非均质性、隔层的封隔性等因素对水驱控制程度及动用状况的影响，通过优化注水推进方向及速度，强化动态调整措施，提高了稳产基础。