自主探测系统的Bayes递推估计策略

探测系统被动地接爱外界的测量信息是不够的,因此方式获得的数据是不完备的,由此揄得出的结论在一定程度上具有不确定性,是不能接受的,为获得可靠的信息,常采用多传感器的数据融合或装备自主传感器的方法,文中将Bayes递推估计策略应用于自主探测系统,使其能最逼真的再再所关心的探测对象。     

基于CCD技术的自举式光学水平基准测量方法

提出了一种以CCD器件为传感器的光学水平基准的测量方法 ,具体介绍了以单片机 89C5 1为核心处理器的水平基准测量电路的软硬件设计。     

电子管烘干设备结构设计

就某型电子管烘干设备的主要技术特点、结构组成作了阐述,并针对研制过程中所遇到的若干问题进行了探讨。     

基于FF功能块的过程控制系统优化

本文对FF现场总线标准的功能块及其结构进行了介绍,并从提高控制的分散性和安全性着手,分析了基于功能块的过程控制系统的优化方法.     

用Ethernet＋TCP／IP构建现场实时通信网络平台

分析了Ethernet和TCP／IP技术给现场实时通信网络带来的影响,介绍了具有Ethernet网络接口和TCP／IP协议功能的现场智能设备的硬件组成、通令协议层次模型、协议构成和协议数据格式,描述了现场智能设备中发送和接收数据的实现过程。     

网络负载分流器的实现技术

网络风载分流器的实现技术,解决了如何正确的捕获用户提出的应用请求并将之分流给真实的应用服务器,如何在系统核心内部动态地对所分流的服务器进行正确的管,本文描述了使用的Linux系统下通过添加核心模块和使用虚拟设备驱动的管理方法来设计实现系统。     

葡萄贮藏中SO2伤害与活性氧代谢的关系

以耐SO2品种巨峰和不耐SO2品种红地球葡萄为材料,研究了葡萄贮藏中SO2伤害与活性氧代谢的关系,结果表明,SO2伤害葡萄体内活性氧水平,GSH含理和ASP活性增加,SOD和CAT活性降低,与红地球相比,巨峰具有较高的SOD活性和GSH水平,受SO2伤害后,巨峰的ASP活性上升幅度大于红地球,其SOD活性和CAT活性的下降幅度低于红地球。     

Bridging the physical and virtual worlds by local connectivity-based physical selection

The prevalent visions of ambient intelligence emphasise natural interaction between user and functions and services embedded in the environment or available through mobile devices. In these scenarios the physical and virtual worlds seamlessly gear into each other, making crossing the border between these worlds natural or even invisible to the user. The bottleneck in reaching these scenarios appear in the natural mapping between the physical objects and their virtual counterparts. The emergence of local connectivity in mobile devices opens possibilities for implementing novel user interface paradigms to enhance this mapping. We present physical selection paradigm for implementing an intuitive human technology interaction for mobile devices. In order to demonstrate the feasibility of the paradigm we implemented two experimental set-ups using commercially available smart phones with IrDA connectivity. The experiments involved selecting a website by physically pointing at its symbol and making a phone call by pointing at an icon representing the person to be called. In tentative user experiments the physical selection method was more time-efficient and it was perceived more positively by the users than a conventional method.

Modelling of the lignin peroxidase LIII of Phlebia radiata: use of a sequence template generated from a 3-D structure

A model of the lignin peroxidase LIII of Phlebia radiata wasconstructed on the basis of the structure of cytochrome c peroxidase(CCP). Because of the low percentage of amino acid identitybetween the CCP and the lignin peroxidase LIII of Phlebia radiata,alignment of the sequences was based on the generation of atemplate from a knowledge of the 3-D structure of CCP and consensussequences of lignin peroxidases. This approach gave an alignmentin which all the insertions in the lignin peroxidase were placedat loop regions of CCP, with a 21.1% identity for these twoproteins. The model was constructed using this alignment andthe computer program COMPOSER, which assembles the model asa series of rigid fragments derived from CCP and other proteins.Manual intervention was required for some of the longer loopregions. The -helices forming the structural framework, andespecially the haem environment of CCP, are conserved in theLIII model and the core is close packed without holes. A possiblesite of the substrate oxidation at the haem edge of LIII isdiscussed.     

High-temperature superconducting microwave devices: Fundamental issues in materials, physics, and engineering

High-T _c superconductivity has generated a great deal of interest because of the challenges it presents in the fields of material science, condensed matter physics, and electrical engineering, and because of the potential applications which may result from these research efforts. Thin-film passive microwave components may become the first high-temperature superconducting (HTS) devices available for widespread use and commercialization. In this article, we review aspects of material science, physics, and engineering which directly impact high-T _c superconducting microwave devices and discuss issues which determine the performance of these devices. Methods of growing HTS thin films on large-area substrates, techniques for fabricating single-level HTS passive microwave components, and the relevant properties of high-T _c superconducting films are discussed, with a focus on thin films of the HTS material YBa₂Cu₃O_7–. Several known mechanisms for microwave loss in both the superconductor and the dielectric substrate are presented. An overview of the general classes of superconducting passive microwave devices is given, and representative microwave devices which have been recently demonstrated are described in detail. Examples of a select few HTS active microwave components are also presented. Potential microwave applications are illustrated with comparisons to current technology.