家庭智能终端系统的硬件设计与实现

随着生活水平的提高,人们对居住环境的舒适性、安全性要求不断提高。家庭自动化、智能化已经成为自动化领域的一个发展热点。本文将当前比较先进的ARM技术运用到家庭智能终端系统的开发上,设计实现了一个既适合当前家庭需要又符合今后发展方向的家庭智能终端体系结构,较好地解决了绝大多数智能家居系统所普遍存在的实时性差、安全性低等问题。     

高清嵌入式系统中的DVI驱动开发

以飞思卡尔半导体的MX51为系统硬件平台,给出了高清嵌入式产品中DVI视频显示接口的实现方案;通过处理器的LCD1接口,外扩TFP410芯片实现DVI视频输出;分析了framebuffer的实现机制及其在驱动中的应用;详细讲述Linux2．6．28内核下基于framebuffer开发DVI驱动的方法及步骤。该设计应用于高清机顶盒等产品中,效果良好。     

Ionic liquids as electrolytes

Salts having a low melting point are liquid at room temperature, or even below, and form a new class of liquids usually called room temperature ionic liquids (RTIL). Information about RTILs can be found in the literature with such key words as: room temperature molten salt, low-temperature molten salt, ambient-temperature molten salt, liquid organic salt or simply ionic liquid. Their physicochemical properties are the same as high temperature ionic liquids, but the practical aspects of their maintenance or handling are different enough to merit a distinction. The class of ionic liquids, based on tetraalkylammonium cation and chloroaluminate anion, has been extensively studied since late 1970s of the XX century, following the works of Osteryoung. Systematic research on the application of chloroaluminate ionic liquids as solvents was performed in 1980s. However, ionic liquids based on aluminium halides are moisture sensitive. During the last decade an increasing number of new ionic liquids have been prepared and used as solvents. The general aim of this paper was to review the physical and chemical properties of RTILs from the point of view of their possible application as electrolytes in electrochemical processes and devices. The following points are discussed: melting and freezing, conductivity, viscosity, temperature dependence of conductivity, transport and transference numbers, electrochemical stability, possible application in aluminium electroplating, lithium batteries and in electrochemical capacitors.     

基于VC和三菱MX组件的数据采集系统

介绍了在VC++6.0环境下,利用三菱MX组件实现工业控制计算机与三菱Q系列PLC的通信的方法。该系统完成了数据的实时采集和动态显示,为用户提供了一个可视化的界面,并将数据通过ADO接口保存到数据库中。本文主要阐述了利用MX组件进行编程的一般方法和相关要点。     

便携设备中嵌入式Linux电源检测驱动开发

针对便携设备中的电源使用要求,提出了电池电量检测、外部电源检测的低成本解决方案.采用飞思卡尔半导体的MX27处理器,设计了嵌入式Linux2.6内核下的设备驱动程序,分析了Linux2.6内核中新的驱动管理和注册机制,讨论了platform_device及platform_driver的定义和使用方法.该解决方案在实际...     

Influences of a New Admixture MX on Concrete Durability

The performance of concrete with a new admixture MX was studied by using the freeze-thaw cycle, permeability aud chemical attack test. The experimental results show that MX improves the durability of concrete. Within the optimum proportion ranges from 0. 1% to 1% , the compressive strength of concrete after freezethaw is increased by 20%- 50% , and Young‘ s modulus can be increased by 3.76- 5.64 times. The strength aud weight loss of concrete with 0. 4% MX are respectively decreased by 28% and 60% after hydrochloric acid attack.The strength aud weight loss of concrete with 0. 4% MX are decreased by 5%- 20% after sulfuric acid aud sodium sulfate attack. The permeability of concrete with 1% MX at 28 days can be decreased by more than 30% . The investigation of the negative temperature property of MX aud analysis on concrete composition and microstructure by MIP reveal that the heat couduction is resisted aud the freezing procedure of solution in concrete pore is retarded due to the adding of MX. Moreover, the pore structure of concrete with MX is improved, thus improving the durability. Bated on this study, a resistance model of MX to block the heat aud mass transference was proposed, and the mechanism of durability improvement of concrete with MX was explained.     

通过Dreamweaver MX 2004的操作实现动态信息发布系统的设计

传统的信息发布系统主要是通过采用网页编辑工具结合编写某种动态技术的源代码来实现的,本文详细的介绍了如何通过Dreamweaver MX 2004的操作来代替手写代码,进而实现基于ASP技术的信息发布系统.     

Competitiveness of shallow water hydrocarbon development projects in Mexico after 2015 actualization of fiscal reforms: Economic benchmark of new production sharing agreement versus typical U.S. federal lease terms

Development of Mexican hydrocarbon reservoirs by foreign operators has become possible under Mexico's new Hydrocarbon Law, effective as per January 2015. Our study compares the economic returns of shallow water fields in the Gulf of Mexico applying the royalty and taxes due under the fiscal regimes of the U.S. and Mexico. The net present value (NPV) of the base case scenario is US$1.4 billion, assuming standard development and production cost (opex, capex), 10% discount rate accounting for the cost of capital and revenues computed using a reference oil price of $75/bbl. The impact on NPV of oil price volatility is accounted for in a sensitivity analysis. The split of the NPV of shallow water hydrocarbon assets between the two contractual parties, contractor and government, in Mexico and the U.S. is hugely different. Our base case shows that for similar field assets, Mexico's production sharing agreement allocates about $1,150 million to the government and $191 million to the contractor, while under U.S. license conditions the government take is about $700 million and contractor take is $553 million. The current production sharing agreement leaves some marginal shallow water fields in Mexico undeveloped for reasons detailed and quantified in our study.     

通信基站现场综合监控系统设计

针对传统监控系统功能单一、集成度低,对通信基站进行综合监控成本高、维护困难等问题,设计了一套集视频监控、消防、安防于一体的综合监控系统。系统选用i ．MX53系列MCU作为中央处理器,实现了对基站的视频监控,温度、湿度、烟雾、门磁、振动、空调室内外机断线报警,手动报警,市电及蓄电池监控,以及报警后120 s视频本地存储等功能;同时系统能够远程控制,对采集到的视频图像和报警数据通过有线网络或无线网络传输,方便实时监控和管理,实现通信基站无线组网监控。     

基于i.MX35的挖掘机视频监控系统设计

挖掘机等工程机械需要对施工现场的视觉盲区进行视频监控,确保作业安全.为了满足安全需求,研制了基于i.MX35的挖掘机视频监控系统,使用i.MX35作为视频主处理器、ADV7180作为NTSC/PAL摄像头输出视频的解码芯片、eMMC或PATA接口固态硬盘作为视频存储介质,实现对挖掘机等工程机械作业现场的视频监控、记录与回放等功能,能够显著提高生产效率、保证作业安全,可以广泛应用于挖掘机等工程机械的控制系统中.