无线MIMO系统的容量分析及其在3G中的应用

在无线MIMO(MultipleInputMultipleOutput)系统信号模型的基础上,分析了无线MIMO系统的容量,讨论了无线MIMO系统提高频谱利用率的基本原理,并且给出收发天线数量和信噪比对系统容量影响的试验结果。最后,对无线MIMO系统的应用,尤其在第三代移动通信中的应用做出了比较详细的说明。     

本地网光缆线路物理双路由的互保问题

针对本地网光缆线路受市政建设的影响，迁、改割接比较频繁且常会受到外力的作用而阻断的情况，讨论了用户引入光缆和中继光缆物理双路由互保的问题。     

乌鲁木齐有线电视网络综合业务管理平台

主要阐述了乌鲁木齐广电网络公司建立广电综合业务平台的一些经验以及系统功能，从多个角度解释了广电综合业务管理平台的组成，以及各个组成部分之间的业务集成、流程关系、系统特色。该系统主要侧重于广电网络系统平台，以平台为基础，可以构建非常强大的业务应用流程，比如办公自动化、数据收费等，该系统可作为广电同行建立类似系统时的参考。     

真空荧光显示屏基板绝缘层的质量控制

详细地分析了影响真空荧光显示屏基板断极和连极的主要原因是绝缘层的印刷质量，并提出了强制绝缘层印刷质量的措施。     

射孔完井合理射开程度的数值模拟研究

射孔是油气井的主要完井方式之一,不同的射孔参数对井的产能有不同的影响。为科学而准确地预测不同射孔条件下井的产能,利用有限元分析法建立了三维单相油藏渗流数学模型,讨论了有限差分法对模型的求解。针对长庆油田低渗透、低产能的特点,通过数值分析法,分析了不同射开程度对油井产能比的影响,为选择合理的射孔方案,最大程度地提高油井产能提供了理论依据,对指导现场射孔作业有重要的实际意义。     

指针式水表数据远传系统的研究

分析现有人工抄表方式及已有水表自动抄表系统存在的问题,提出一种低成本的基于视觉技术的指针式水表远传抄表系统的设计方案。该系统平时不需要供电,只是在抄表时才临时提供电源,具有节电功能且无数据累计误差;水表读数以图像方式保存,当出现问题时便于用户核对。采用图像截取方法仅采集对识别有用的图像信息,降低对存储空间及处理速度的要求,用较低成本的处理器替代高成本专用图像处理器,降低电路成本;根据采集的指针图像特点和指针式水表的结构特征,设计确定指针指向的算法,并将识别软件嵌入到硬件采集器中,在硬件采集器中实现指针式水表读数的识别。实验证其可应用性,对指针式水表数据远传系统的发展有重要意义。     

Morphology transformations of pentacene on an UV-patternable polymer insulator and their effect on performance of flexible organic thin-film transistors

This work presents a low temperature with high resolution capability UV-patternable polymer, i.e. mr-UVCur06, for use as a gate insulator in OTFTs, by investigating the morphology transformation of pentacene deposited on the mr-UVCur06. The device structure is polyethylene terephthalate (PET)/indium-tin oxide (ITO)/mr-UVCur06/pentacene/Au (source/drain). In addition to its solution-processable capability, mr-UVCur06 is directly patterned by UV light in a low-temperature process. UV/ozone post-treatment of the patternable mr-UVCur06 can illuminate organic contaminants from its surface and increases surface energy. Experimental results indicate that a high surface energy existing at the mr-UVCur06 surface has produced in a larger ratio of I_{thin film phase}/I_{triclinic bulk phase} in pentacene. Then, the distance of pentacene molecular crystal structure, which is arranged in the thin film phase, is shorter than that in triclinic bulk phase. The performance of pentacene-based OTFTs can be enhanced with few contaminants and a high surface energy on the UV-patternable gate insulator. By performing UV/ozone post-treatment on the mr-UVCur06 insulator surface for 60 s, the OTFTs demonstrate a mobility, on/off drain current ratio, and V_T of 0.34 cm²/V s, 5.5 × 10⁴, and 2.5 V, respectively. Furthermore, the low-temperature photopatternable polymer dielectric paves the way for a relatively easy and low-cost fabrication of an OTFT array without expensive and complicated photolithography and dry etching.     

On the origin of decay of spin current with temperature in organic spintronic devices

This article addresses the most challenging question facing the organic spintronics community today – what causes the universal loss of Giant Magnetoresistance (GMR) signal in organic spin valve devices made with different spin-polarized electrodes and organic semiconductor spacers? Careful analysis of our own and other experimental results available in literature indicate that transition of transport from polaron tunneling limit (suggested by the variable range hopping model) to thermally activated hopping limit (in the temperature range of 40–58 K) marks the most significant decrease of spin relaxation in organic semiconductors. With increasing occupancy of the available hopping sites by the thermally activated carriers, chances of spin flip inside the organic semiconductors increases significantly causing fast spin relaxation in the spin-valves.     

器件变更管理

上游厂家的器件变更、停产是研发制造型企业产品设计、生产和维护中经常碰到的问题。该文介绍了器件变更及停产通知,讨论了器件变更的实施途径,这些管理和控制,对于延续产品的质量和可靠性至关重要,尤其是批量生产的产品。     

InRout - A QoS aware route selection algorithm for industrial wireless sensor networks

Wireless sensor networks are a key enabling technology for industrial monitoring applications where the use of wireless infrastructure allows high adaptivity and low cost in terms of installation and retrofitting. To facilitate the move from the current wired designs to wireless designs, concerns regarding reliability must be satisfied. Current standardization efforts for industrial wireless systems lack specification on efficient routing protocols that mitigate reliability concerns. Consequently, this work presents the InRout route selection algorithm, where local information is shared among neighbouring nodes to enable efficient, distributed route selection while satisfying industrial application requirements and considering sensor node resource limitations. Route selection is described as a multi-armed bandit task and uses Q-learning techniques to obtain the best available solution with low overhead. A performance comparison with existing approaches demonstrates the benefits of the InRout algorithm, which satisfies typical quality of service requirements for industrial monitoring applications while considering sensor node resources. Simulation results show that InRout can provide gains ranging from 4% to 60% in the number of successfully delivered packets when compared to current approaches with much lower control overhead.