基于ZigBee-GPRS的现代水产养殖系统的设计

文中针对当前水产养殖控制系统的缺陷性和养殖现场环境的复杂性,结合WSN(Wireless Sensor Network)技术优势,研制一套基于Zig Bee-GPRS无线通信技术的水产养殖监控系统,系统实时监测并精准控制和水产养殖紧密相关的环境因子,如温度、盐度、溶解氧、氨氮和p H值等,自行设计传感网络节点,部署获取水体参数的传感网络。并开发了传感节点、网关节点及服务器端相关软件,实现对水体参数的监测、控制、存储和查询等功能。     

水产养殖环境因子监控系统

鉴于水质对水产养殖的重要性,研制了水产养殖环境因子监控系统。该系统由上位机和下位机组成,上位机由PC实现,下位机以AT89S51单片机为核心。系统辅以专家系统,可以实现水产养殖环境因子的实时监控、数据的采集、显示、存储等功能。     

基才LabVIEW的水环境因子无线监测系统设计

为了解决传统水产养殖环境因子有线监测系统的布线复杂、可靠性较低等问题，以LabVIEW为开发平台，采用无线数据传输方式，设计了一种水产养殖环境因子无线监测系统。该系统实现了对水环境因子pH值的实时采集、显示和存储，以及历史数据查询等功能。试验结果表明，该系统运行稳定、能够准确地采集和显示水环境因子pH值，且具有操作简便、交互性好、性价比高和易扩展等优点。     

水产养殖的物联环境监控系统设计

物联网技术的发展,带动了对水产养殖环境的监控,能够更有效的促进水产养殖。本设计在物联网的感念上,设计了一种基于水产养殖的环境监控系统,对水产养殖的系统架构、传感网络层的硬件和无线网络建立进行了系统设计。     

海洋水产养殖物联网系统研究

本文通过海洋水产养殖到销售模式整个过程的研究分析，提出海洋水产养殖物联网系统模型。该模型涵盖了渔业水产养殖、加工、运输及销售环节的物联网技术运用，解决了传统养殖存在的种种弊端，满足市场需求，提升了工作效率。     

充分利用人力资源提高水产养殖企业效益

水产养殖是一种高投资、高收入、高风险的行业。水产养殖企业要在市场上争得一席之地,就要充分得用人力资源。本文从养殖场各岗位的职责、养殖人员的培训、建立和完善分配机制以及实行科学规范的用人机制等几个方面进行探讨,使得水产养殖企业效益得到提高。     

基于LoRa的低功耗无线水质传感器设计与研究

水质环境变化多端,需要运用新型传感器完成对水环境的实时监测任务,提高水产养殖效益与质量,实现科学养殖的目标。本文主要叙述了基于LoRa的低功耗无线水质传感器的有效设计策略。     

水产养殖中病害的预防措施

随着水产养殖病害的种类越来越多,爆发的频率越来越快,造成不同程度经济损失发生,阻碍了水产养殖可持续发展,给水产养殖业的发展带来巨大的冲击,使许多养殖企业和个人丧失信心。因此,如何更好的防治水产养殖的病害,已经成为当下值得养殖者深入探讨的课题。     

无人机技术在水产养殖作业通信系统中的应用

由于原有通信系统存在信号数据接受间隔,无法对水产养殖作业产生的数据进行连续性控制,导致各个节点不能直接和终端完成闭环通信,对养殖水质的控制效果逐渐降低,最终影响水产养殖的效果,研究无人机技术在水产养殖作业通信系统中的应用。在硬件设计上,构建无人机通信数据传输框架,完成不同类型通信数据解码;设计数据接收串口电路单元,实现通信数据信号的控制与管理。在软件设计上,基于无人机构建水产养殖通信模型,集约化处理养殖作业约束条件,规划全覆盖路径定位水产养殖作业通信,完成系统设计。实验结果:以水产养殖池塘的水质参数进行实时监测,将增氧机设备的控制效率作为测试对象,在该文通信系统应用下,能够对发生水质问题的养殖区域进行增氧机调控,及时对养殖池塘的生态环境进行调控,具有实际应用意义。     

基于海洋水产大数据价格分析预测系统的研究

随着物联网、云计算、移动互联等信息技术在渔业领域的广泛应用,渔业数据呈现海量爆发趋势,水产养殖的暴利时期慢慢远去,渔业跨步迈入大数据时代。文章通过基于水产养殖价格的大数据分析预测系统,建立水产品价格预测模型等,定位于所有的水产养殖户,将销售信息实时地反馈给养殖户,根据市场调节去养殖,真正做到按需养殖,提高渔业的生产效率。     

Technology innovation and process integrations for sub-100nm gate patterning

This paper presents a brief overview of the Applied Centura(R)DPS(R)system,configured with silicon etch DPS Ⅱ chamber, with emphasis on discussing tuning capability for CD uniformity control. It also presents the studies of etch process chemistry and film integration impact for an overall successful gate patterning development. Discussions will focus on resolutions to key issues, such as CD uniformity, line-edge roughness, and multilayer film etching integration.     

White organic light-emitting devices based on fac tris（2- phenylpyridine） iridium sensitized 5,6,11,12-tetraphenylnap -hthacene

We have fabricated the white organic light-emitting devices （WOLEDs） based on 4,4＇ -bis（2,2 -diphenyl vinyl）-1,1＇ - biphenyl （DPVBi） and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene （rubrene）. The device structure is ITO/2T-NATA （20 nm）/NPBX （20 nm）/CBP： x%Ir（ppy）3：0.5% rubrene （8 nm）/NPBX （5 nm）/DPVBi （30 nm）/Alq（30 nm）/LiF（0.5 nm）/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris （2-phenylpyridine） iridium [Ir（ppy）3], acts as a yellow light-emitting layer, and N,N＇ -bis- （1-naphthyl）- N,N＇ -diphenyl -1, 1＇ -biphenyl-4,4＇ -diamine （NPBX） acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir （PPY）3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V.     

Complete approach to automatic identification and subpixel center location for ellipse feature

To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction.     

小角度扩展相关性近似算法分析

本论文提出一种在多天线MIMO信道相关性建模中小角度扩展近似理论算法,并应用于分析MIMO系统性能。分析中分别对三种不同角能量分布情况下的空间相关性研发快速近似计算法,并同时提出双模(Bi-Modal)角能量分布情况下的近似运算。通过分析这些新方法的近似效率,可以得到计算简单、复杂度低、而且符合实际的MIMO相关信道矩阵,对系统级的快速高效计算法的研究和系统级的评估以及误差分析具有重要的意义。     

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.     

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.     

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.     

A Versatile Mixed-Signal Pin Approach for Cost-Effective Test of Automotive ICs

Integrated circuits (ICs) intended for increasingly sophisticated automotive applications bring unique test demands. Advanced ICs for applications such as highly integrated automatic braking system (ABS) and airbag controllers combine high voltage digital channels, significant VI demands and precise timing capability. Along with continued missioncritical reliability concerns, the trend toward higher voltage operation and increased device integration requires specialized test capabilities able to extend across the wide operating ranges found in automotive applications. Among these capabilities, automotive test requirements increasingly dictate a need for a cost-effective versatile mixed-signal pin electronics with very high data rates reaching up to 50MHz with a voltage swing of-2 V to +28 V.     

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.     

Optical vibration and deviation measurement of rotating machine parts

It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer （LDV）.