传感器智能化及电子数据表格更新方式的研究     

朱晓博马尚昌  张素娟杨笔锋 《成都信息工程学院学报》2014,(1):59-64

针对传感器发展现状、特点及应用,利用STM32微控制器与轻量级TCP/IP协议栈结合的方式实现了传统传感器的智能化,并利用在程序中编程技术实现了传感器电子数据表格TEDS(Transducer Electronic Data Sheets)的在线更新。一方面实现了传统传感器的智能化,使其能够自动识别、即插即用,并支持在线更新与升级,另一方面实现了传感器的网络化,方便传感器的远程访问与控制。  相似文献   

黄海、东海上层海水磷循环的同位素示踪研究          下载免费PDF全文

张远辉  尹明端 《海洋学报》2007,29(1):49-57

采用超低本底液闪β计数的方法,测定了春季黄海、东海海水中溶解态、悬浮物、筛绢颗粒物和雨水中天然32P和33P的比活度.结果显示,上层海水各相33P,32P的比活度相当低,其中TDP的32P,33P比活度的浓度最高,悬浮物次之,筛绢颗粒物最低.海水各相中33P与32P活度比值从TDP到悬浮物、筛绢颗粒物逐渐增大,反映出食物链传递过程中磷的年龄逐渐增加.根据稳态模式的估算结果,海水各相中磷的停留时间具有明显的区域变化特征,其中近岸和内陆架溶解磷的停留时间比外陆架短,仅为3~4 d,意味着近岸和内陆架海区低浓度的磷也可能维持高生物生产力的运转.利用稳态模式还估算出浮游植物的碳同化通量为189~814 mg/(m2·d),浮游动物的碳摄食通量为10~161 mg/(m2·d).此外,通过比较雨水32P,33P的输入通量和海水32P,33P积存量,利用质量平衡方法估算出上层海水POC输出通量为102~972 mg/(m2·d).  相似文献   

GDP-32II、EH4在深部成矿预测中的应用     

张作伦 《地质与勘探》2010,46(3):470-475

为了探索出一套有效评价矿体深部成矿潜力方法,利用GDP-32II多功能电测系统探测地质体深部充电率特征,装置为单极—偶极装置,方法为时间域直流激发极化法,测量极罐间距40m,无穷远极大于1000m;利用EH4电导率成像系统探测地质体深部电阻率特征,测量电极间距20m或40m。结果表明该方法组合可以有效探测地下340m充电率特征、600m电阻率特征。最后,结合已有地质、地球化学等资料进行综合解译,认为矿化异常体具有高充电率、低电阻率特征、达到评价深部成矿潜力目的。  相似文献   

智能动态地气采样装置研制     

周四春  张保静  杨宇奇 《物探与化探》2012,36(6):1059-1063

为了自动控制动态地气采样中的抽气流量,监测采样点的环境参数,以便对采集的地气样品的质量进行有效控制和科学评估,设计开发了一种以32位STM32F103RBT6微控制器为平台的智能动态地气采样装置.这种装置在野外工作现场可以按照所设定的流量和时间来抽取地气,能检测采样现场环境的温湿度参数,绘制动态流量曲线并显示,可以将动态流量曲线及温湿度参数存储到SD卡内.  相似文献   

Keck infrared observations of GRO J0422+32 in quiescence     

Mark T. Reynolds  Paul J. Callanan  Alexei V. Filippenko 《Monthly notices of the Royal Astronomical Society》2007,374(2):657-663

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井下地震计信号方位角硬件校正方案设计     

周云耀  王鹏辉  王海斌  吕永清 《大地测量与地球动力学》2020,40(11):1200-1205

设计一种井下地震计信号方位角校正方案,直接对地震计的输出进行校正,使数据采集器记录到的数据即为仪器方位角符合要求时的信号。基于MATLAB程序的Simulink仿真工具箱计算结果表明,本文方案可应用于校正井下地震计方位角偏差,具有较高的可行性。  相似文献   

One-dimensional electric field structure of an outer gap accelerator – III. Location of the gap and the gamma-ray spectrum     

Kouichi Hirotani  Shinpei Shibata 《Monthly notices of the Royal Astronomical Society》2001,325(3):1228-1240

We investigate a stationary particle acceleration zone in the outer magnetosphere of an obliquely rotating neutron star. The charge depletion as a result of global current causes a large electric field along the magnetic field lines. Migratory electrons and/or positrons are accelerated by this field to radiate curvature gamma-rays, some of which collide with the X-rays to materialize as pairs in the gap. As a result of this pair-production cascade, the replenished charges partially screen the electric field, which is self-consistently solved together with the distribution of particles and gamma-rays. If no current is injected at either of the boundaries of the accelerator, the gap is located around the so-called null surface, where the local Goldreich–Julian charge density vanishes. However, we find that the gap position shifts outwards (or inwards) when particles are injected at the inner (or outer) boundary. We apply the theory to the seven pulsars whose X-ray fields are known from observations. We show that the gap should be located near to or outside of the null surface for the Vela pulsar and PSR B1951+32, so that their expected GeV spectrum may be consistent with observations. We then demonstrate that the intrinsically large TeV flux from the outer gap of PSR B0540–69 is absorbed by the magnetospheric infrared photons, causing it to be undetectable. We also point out that the electrodynamic structure and the resultant GeV emission properties of millisecond pulsars are similar to young pulsars.  相似文献   

Development of a facility for analysis of natural ^32Si     

《中国地球化学学报》2006,25(B08):199-200

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Geochemische und 13C/12C-isotopenchemische Untersuchung zur Herkunft der Kohlensäure in mineralhaltigen Wässern Nordhessens (Deutschland)     

M. Dietzel  H. Schwecke  A. Hirschfeld  M. Rhring  M. E. Bttcher 《洁净——土壤、空气、水》1997,25(4):191-201

Geochemical and ¹³C/¹²C-isotopical Investigation of Mineral Waters in Northern Hessia (Germany) and the Origin of their CO₂ Content The dissolved carbonate originates from three sources: 1. biogenetic soil-CO₂, 2. volcanic CO₂ related to the evaporites of the Zechstein formation, and 3. carbonate derived from the dissolution of limestones and dolomites. Miocenic basaltic melts penetrated the evaporites of the Zechstein, and the related CO₂ was trapped in the intra- and intergranulars of the salt minerals. Circulating meteoric waters dissolve the salt minerals releasing CO₂ gas. Thus, the occurrence of basalt is related to the CO₂ contents of the evaporites, and the dissolution of only small amounts of salts rich in CO₂ may result in a high concentration of carbonic acid. In waters rich in carbonate, where volcanic CO₂ dominates over the other two sources of carbon, a δ¹³C-value of “salt-CO₂” of about –1‰ (PDB) is obtained. Water with less dissolved carbonate species have smaller quantities of salt-CO₂ down to about 20%.  相似文献   

利用Win 32 API通信函数设计串行通信程序   总被引：5，自引：1，他引：4  

袁志勇  苏光奎  杨维均 《测绘信息与工程》2000,(4):33-37

在Windows95/98OS和VisualC^ 5.0/6.0软件开发平台下,介绍了利用Win32API串行通信函数实现PC机串行通信的技术及编程方法,并给出了一处在后台房问串口的通信程序示例。  相似文献