P2P网络管理系统信息模型的设计与实现

为满足基于P2P的网络管理体系结构中管理节点间的协作需求,提出了一种基于语义Web服务和XML的网络管理信息模型.利用P2P通信和语义Web服务,可实现网管服务的分布式注册,服务的统一描述和基于能力的服务检索;利用XML来制订网络管理服务调用的标准,可以实现服务的跨域自动调用.原型实现和运行测试表明,利用提出的模型框架,异构网络管理系统可以通过节点间的服务调用和信息共享实现管理任务的协作.     

一种物联网设备自动描述方法

物联网感知设备的服务描述文件为海量资源的发现与检索提供了有效的支持,是面向服务的物联网架构的基础.当前服务描述文件主要通过开发人员手工撰写完成,工作量大.现有研究SPITFIRE提出了一种半自动方法协助开发人员撰写服务描述文件,但方法本身为集中式方法,配置较复杂且精度过度依赖人工参数调优,不适合大规模部署.针对物联网海量设备的描述问题,本文提出了一种基于度量学习的分布式的物联网感知设备自动描述方法.该方法使用设备的多种数值特征作为输入,利用一种分布式的DBSCAN聚类算法对设备进行归类与推导,设备通过归类结果可自动生成自身描述文件.该方法利用度量学习优化聚类的度量函数以保障精度,以分布式方式进行灵活快速的配置,可减少人工干扰.仿真实验表明,与使用单一属性作为度量方式的SPITFIRE相比较,本文方法在获得对设备聚类相当的查全率的同时,查准率提高了20.4%,更适合于物联网海量设备使用场景.     

一种基于UDP通信的远程过程调用方法

RPC是一种有效的远程网络服务请求调用方法,针对主流RPC框架均为基于TCP协议,复杂的架构制约了其在轻量级应用程序的有效应用,为进一步简化系统复杂度、减少系统开销、提高传输效率,提出一种基于UDP通信的远程调用方法,采用UDP协议,利用负载均衡策略,基于服务进程向注册进程注册服务的方式,应用进程从注册进程获取服务进程的相关信息,实现应用与服务进程的直接RPC通信,有效地提高系统通信传输效率。     

一种基于语义推理的智能家居系统研究

为提高智能家居系统的智能化,研究实现了一种支持语义推理的智能家居系统,基于自定义的服务规则,该系统能自动提供人性化功能.基于国际标准,化组织OneM2M制定的物联网标准,提出了新的语义架构,增加了设备对象池和指令集模块;结合家庭服务需求,分析了智能家居系统需要提供的服务功能,给出了智能家居设备本体模型结构,并采用OWL进行形式化描述.最后,使用SWRL构建了相应的服务规则,使用Jena推理机进行验证.通过系统验证,该系统能提供多种智能家居服务,而且具有较好的准确性和可靠性.     

基于分层和服务总线联邦的无线电监测服务调用研究

本文针对无线电监测一体化建设中面临的异构设备调用和跨系统、跨地域设备调用问题,提出了基于分层的服务总线和服务总线联邦的架构设计,为实现监测设施的透明化掌控和提高全域监测设施的联合作业能力提供了解决思路,同时分析了该解决方案的其他应用可能和优势,为相关行业一体化建设架构设计和服务调用提供参考。     

基于Kinect的车载手势识别辅助系统设计

车联网作为战略性新兴产业中智能化汽车和物联网两大领域的重要交集,受到广泛关注.通过车联网、地理位置服务(Location Based Service)、手势感应三种技术的分析,将其整合成综合系统,实现手势操作在车载系统中的多媒体功能和地理位置服务.采用Kinect作为手势感应设备,建立WPF工程,设计界面并进行具体功能编程.通过百度LBS开发者平台提供的相关API进行数据调用,实现LBS服务.测试结果表明,系统具有功能多样、灵活方便的特点,具有良好的应用前景.     

基于ARM的嵌入式Linux字符设备驱动设计研究

本文描述了基于ARM嵌入式Linux的字符设备驱动设计,设备调用的过程,阐述了嵌入式linux下字符设备驱动设计中的关键技术,包括设备的注册、中断响应卸载等。     

物联网数据采集中间件模型的设计与实现

物联网的快速发展导致了异构数据源大量出现,这一问题逐渐成为物联网发展的瓶颈。文中基于XML技术提出并实现了一种物联网数据采集中间件模型,该模型便于将异构数据源的数据信息进行标准统一化,为上层应用提供Webservice服务的同时,还提供了标准表数据调用。为消除物联网快速发展瓶颈及物联网相关技术研究等方面提供了参考。     

基于物联网技术的智慧医院系统设计

随着物联网技术的普及,智慧医疗成为医疗领域的重要发展趋势之一。文章基于物联网技术,设计了一套智慧医院系统,该系统包括患者信息管理、医生排班管理、医疗设备监测等功能模块。通过该系统,医院可以实现信息化管理,提高医疗服务效率和患者满意度。     

基于JNI的电子签章系统安全接口设计

JNI技术使得Java语言能够直接调用C++语言实现的本地函数,文中通过分析JNI技术,调用微软Crypto API库,实现了在USB KEY硬件中关于电子签章系统所需要的密码方案,实现了电子签章服务层与密码服务层的分离,设计了密码设备接口,保证了电子签章系统在互联网环境下应用的安全。     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.     

GaAsSb/InAlAs PA DHBTs Grown by Production MBE

The epi material growth of GaAsSb based DHBTs with InAlAs emitters are investigated using a 4 × 100mm multi-wafer production Riber 49 MBE reactor fully equipped with real-time in-situ sensors including an absorption band edge spectroscope and an optical-based flux monitor. The state-of-the-art hole mobilities are obtained from 100nm thick carbon-doped GaAsSb. A Sb composition variation of less than ± 0.1 atomic percent across a 4 × 100mm platen configuration has been achieved. The large area InAlAs/GaAsSb/InP DHBT device demonstrates excellent DC characteristics,such as BVCEO＞6V and a DC current gain of 45 at 1kA/cm2 for an emitter size of 50μm × 50μm. The devices have a 40nm thick GaAsSb base with p-doping of 4. 5 × 1019cm-3 . Devices with an emitter size of 4μm × 30μm have a current gain variation less than 2% across the fully processed 100mm wafer. ft and fmax are over 50GHz,with a power efficiency of 50% ,which are comparable to standard power GaAs HBT results. These results demonstrate the potential application of GaAsSb/InP DHBT for power amplifiers and the feasibility of multi-wafer MBE for mass production of GaAsSb-based HBTs.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.