恶性斗殴为何屡禁不止？——运营商互殴：粗暴宣泄何以为“道”!

“我有一个梦想：某一天三大运营商员工不摆摊了,不打架了,员工年收入差距缩小了,前端营业员待遇提高了,后端装维与资源矛盾化解了,服务质量提高了,恶性竞争消除了,重复建设停止了,不再破坏对手广告了,不互挖墙角搞策反了,不再零元购机了,不打价格战了,都能活的有尊严了”.     

恶性斗殴为何屡禁不止?

"我有一个梦想:某一天三大运营商员工不摆摊了,不打架了,员工年收入差距缩小了,前端营业员待遇提高了,后端装维与资源矛盾化解了,服务质量提高了,恶性竞争消除了,重复建设     

基于nRF905的无线通信的设计与实现

针对采用芯片nRF905的LED屏无线通信,分别给出了上位机和下位机的系统框图,分析了系统的功耗,比较了无线模块和串口通信的通信速率,验证了系统的可行性,设计了串口通信协议,为保证数据质量,设计了数据通信协议,针对串口数据的nRF905分包转发,设计了无线芯片通信协议,例举了状态机的5种状态,介绍了状态间的转换条件,巧妙地编程设计了通信数据的定时器检查,论述了基于状态机的嵌入式单片机软件编程。     

干扰电子通信的要素以及应对策略的探讨

在当今的社会中,人们已经离不开电子通信了,其作为了一个新兴产业,并得到了良好的应用,对各行各业起到了促进作用,同时,传统的产业收到了冲击。我国的电子通信发展较快,达到了先进的水平,不过,由于发展时间较短,存在很多不足之处,拉低了整体水平。特别是干扰问题,严重影响了电子通信的发展。本文对电子通信进行了概述,探讨了干扰要素,并且,提出了相关的应对策略。     

乱

江湖最近挺乱. 金融海啸了,经济危机了;奥巴马当选了,杨致远下课了;三聚氰胺走了又来了,"林书记"来了又走了;百度乱卖广告被央视曝光了,首富黄光裕涉嫌违法被拘查了;国家开始上万亿的花钱了,央行敢于一百零八个基点的降息了!     

信息技术与科学传播创新

首先回顾信息技术的发展:70年前发明了电视机,65年前发明了计算机,50年前发明了集成电路,45年前出现了光纤,40年前出现互联网,35年前出现个人计算机,30年前出现了移动通信,20年前出现了"WWW",10年前第三代移动通信标准问世。可以看到,近半个多世纪以来信息技术发展非常迅速,集成电路促进了个人计算机的发展,促进了互联网和移动通信,反过来移动通信和互联网也促进了个人计算机和集成电路的发展,互联网影响了社会,移动改变了生活。     

铝电解电容器技术的新进展

详细讨论了电子技术的发展对铝电解电容器的性能要求,提出了其技术对策,分析了存在的技术瓶颈,找出了它的技术出路,探讨了它的技术难点,给出了当前我国铝电解电容器行业的技术现状,指出了未来发展方向。     

智能卡ISO面沾污的解决

简介了GT(软封胶)封装的智能卡封装过程,给出了智能卡I SO面沾污的情况,通过分析设定了产生沾污问题的原因。然后用一系列实验的手段加以验证,找到了产生沾污的根本原因,最后提出了沾污评估的方法,得出了相应的解决方案,并对方案进行了讨论,得出了结论。     

紫外通信综合实验平台信号源设计

阐述了紫外通信的优劣性,分析了紫外通信综合实验平台信号源设计的必要性,设计了紫外通信实验平台的系统结构方案,分析了各部分功能,给出了信号源设计的要求,选用了信号产生芯片MAX038与ICL8038,探讨了两者工作原理,对比了两者的优劣性,根据系统信号源参数要求设计了MAX038外围器件工作参数,最后使用OrCAD Pspice完成了电路的仿真,并通过2个结果分析验证了电路的可行性,这对系统的构建具有十分重要的指导意义。     

广电的云计算之路

云计算经过近几年的发展已经从概念走向了实际应用,从技术变为了服务,并且这种应用的势头正在逐步扩大。近年来,国内省市政府高度重视云计算,北京启动了祥云工程,上海发布了云海计划,西安提出了双云战略,重庆实施了云端计划,等等,众多国内外企业将计算机云计算视为公司发展的重要方向,纷纷发表了、推出了云计算产品和技术解决方案,并通过多层次战略合作加紧了云计算战略布局。     

基于单片机89C51的多路模拟量转换系统

为了解决一些工业生产线上过秤计量困难的问题，提出一种由多路模拟量转换系统加一部分外围电子线路来构成计量仪的开发思想。结合这一开发思想介绍在该应用实例开发中由单片机89C51作为主机构成多路模拟量转换系统的设计与实现过程。详细论述了该系统硬件各部分的工作原理及软件设计方法。系统开发完成后，在模拟现场采集到的两路模拟量的情况下工作稳定，功能完备，收到了良好的实验效果。该系统具有与实际结合紧密的特点，有着良好的推广性和应用前景，对其他类似开发也具有着一定的参考价值。     

First-principles study of the lattice integration of palladium defects in doped germanium and silicon

Time-differential perturbed angular correlations spectroscopy of palladium in doped germanium has identified palladium-vacancy pairing in n-type antimony-doped, p-type gallium-doped and undoped germanium. In contrast, an equivalent study of palladium defects in doped silicon suggests a different scenario for the silicon host. Palladium-vacancy pairing has been proposed in n-type silicon irrespective of the dopant type (phosphorous, arsenic or antimony) but palladium–boron pairing has been speculated to occur in p-type boron-doped silicon. This thus raises the question: why does palladium pair with a dopant atom in p-type silicon, but with a vacancy in p-type germanium? Based on the density functional theory calculations carried out in this work, it is suggested that the size of the dopant and the host material both play a crucial role in determining the type of palladium-defect complex that is formed. The calculations predict a configuration with the palladium atom on a bond-centered interstitial site pairing with a semi-vacancy on either side in gallium-doped and antimony-doped silicon and germanium, respectively. Whereas, a configuration with the palladium atom on a bond-centered interstitial site pairing with the dopant was proposed in boron-doped silicon and germanium. In further support of the argument, in n-type phosphorous-doped materials the calculations predict a configuration with the palladium atom on a bond-centered interstitial site pairing with a semi-vacancy on either side in silicon, but a configuration with the palladium atom on a bond-centered interstitial site pairing with the phosphorous dopant in germanium.     

变压器等效电路中励磁支路问题探讨

在我国的"电机学"教材中,变压器等效电路中的励磁支路一般都是采用励磁电阻和励磁电抗串联的形式,而美版的教材中采用的则是电阻与电抗并联的形式。本文在分析这两种等效电路的基础上,将这两种不同的励磁支路形式进行对比,指出并联型的励磁支路中各参数的物理意义更加明晰,更有利于学生的学习和理解。     

Customization of an embedded RISC CPU with SIMD extensions for video encoding: A case study

This work presents a detailed case study in customizing a configurable, extensible, 32-bit RISC processor with vector/SIMD instruction extensions for the efficient execution of block-based video-coding algorithms utilizing a proprietary co-design environment. In addition to the default Full-Search motion estimation of the MPEG-2 Test Model 5, fourteen fast ME algorithms were implemented in both scalar and vector form. Results demonstrate a reduction of up to 68% in the dynamic instruction count of the full search-based encoder whereas the fast motion estimation algorithms achieved a reduction in instruction count of nearly 90%, both accelerated via three 128-bit vector/SIMD instructions when compared to the scalar, reference implementation of the standard. We address in detail the profiling, vectorization and the development of these vector instruction set extensions, discuss in depth the implementation of a parametric vector accelerator that implements these instructions and show the introduction of that accelerator into a 32-bit RISC processor pipeline, in a closely-coupled configuration.     

Inrush current estimation and hot-swapping for safe parallel battery pack

ABSTRACT

Batteries used in electric vehicles and microgrid applications use battery modules connected in series to satisfy the voltage required for each system, and battery modules are connected in parallel to increase capacity. In this parallel connected system, in order to disconnect and reconnect a specific battery module or to reconnect a new battery module, the battery module to be newly connected should have a small state of charge (SOC) difference from the existing battery modules. In particular, when a new battery is to be connected under a load current, there is a problem that excessive inrush current may occur in a specific battery module due to the load current distributed to each module and the current due to the SOC difference. Therefore, in this paper, we propose a method of estimating the inrush current through an equivalent electrical modelling analysis for the case where a battery module is newly added in a system in which the battery modules are connected in parallel. In addition, the power management algorithm for the battery pack system with inrush current estimation is presented. The proposed method is validated through simulations and experiments of a battery pack system in which 10 battery modules of 710V and 120Ah are connected in parallel.     

Facile Fabrication of Monolithic 3D Porous Silica Microstructures and a Microfluidic System Embedded with the Microstructure

Monolithic 3D porous silica structures are fabricated into a multilayer framework with a bimodal pore size distribution in the micrometer and sub‐micrometer range. The fabrication – which involves directed assembly of colloidal spheres, transfer printing, and removal of a sacrificial template – yields robust and mechanically stable structures over a large area. The structure becomes monolithic upon pyrolyzing the stacked layers, which induces necking of the particles. The monolithic microstructures can easily be embedded in microchannels with the aid of photolithography, leading to the formation of a microfluidic system with a built‐in microstructure in a site‐ and shape‐controlled manner. Utilization of the system results in a fourfold increase in the mixing efficiency in the microchannel.     

Affine hull based target representation for visual tracking

Handling appearance variations is a challenging issue in visual tracking. Existing appearance models are usually built upon a linear combination of templates. With such kind of representation, accurate visual tracking is not desirable when heavy appearance variations are in presence. Under the framework of particle filtering, we propose a novel target representation for tracking. Namely, the target candidates are represented by affine combinations of a template set, which leads to better capability in describing unseen target appearances. Additionally, in order to adapt this representation to dynamic contexts across a video sequence, a novel template update scheme is presented. Different from conventional approaches, the scheme considers both the importance of one template to a target candidate in the current frame and the recentness of the template that is kept in the template set. Comprehensive experiments show that the proposed algorithm achieves superior performances in comparison with state-of-the-art works.     

介观压阻效应

为了突破传统机电转换 ,如压电、压阻及压容等效应的宏观物理局限 ,着手研究介观压阻效应。本文提出 ,通过四个物理过程来实现介观压阻效应。原理上讲 ,在力学信号作用下 ,纳米结构中的应力分布会发生变化 ;应力变化可引起内建电场的产生 ;内建电场将导致纳米结构中量子能态发生改变 ;量子能态改变会引起共振隧穿电流的变化。简述了国内外在上述四个过程方面所做的工作     

多频带数字滤波器的设计和FPGA实现

本文介绍了一种应用于FPGA芯片的多频带数字滤波器的快速高效的设计、验证和实现的方法,该方法不同于传统的FPGA滤波器设计而且十分实用能大大缩短开发周期。首先根据多频带数字滤波器的性能要求,介绍了在具体性能指标下的多频带数字滤波在FPGA中实现的思想和原理,接下来描述了FPGA数字滤波器的传统设计方法和MATLAB设计方法,解释了采用极小化极大准则对滤波器的频率响应进行逼近的原理,然后结合一个具体的多频带数字滤波器的设计,给出了利用MATLAB进行多频带滤波器设计的过程以及HDL代码的生成步骤,最后介绍了该多频带滤波器在Modelsim中的RTL级仿真和在FPGA芯片中的门级实现。     

Combined Use of Magnetic and Electrically Conductive Fillers in a Polymer Matrix for Electromagnetic Interference Shielding

The combined use of a highly magnetic filler (mumetal) in low proportion and a highly conductive filler in high proportion in a polymer matrix provides a composite material that is more effective for electromagnetic interference shielding than the use of a highly magnetic filler alone or the use of a highly conductive filler alone. Mumetal is effective (due to absorption) when it is in a composite material of DC electrical resistivity below 10 Ω cm, as provided by conductive fillers, which contribute to shielding by reflection and allow paths for eddy current.