温度传感器的设计与测试

温度传感器是一种大众熟知的传感器,也是应用最广泛的传感器之一,日常生活中很多电子产品都有它的影子。温度传感器主要是由金属物品和与半导体相关的材料制作而成,功能为计量温度。目前,常用的温度传感器有热电偶传感器、铂电阻温度传感器、半导体热电偶温度传感器、PN结温度传感器等,在科学研究方面以及工业农业的生产方面都起着重要的作用。该文将会从温度传感器概述开始,总结分析温度传感器的设计与测试方法,希望为相关从业者提供一定的参考依据。     

微波冷冻干燥过程中光纤测温技术的研究

分析了半导体吸收波长随温度的变化特性,选用红外发光二极管作为信号光源,光纤采用石英光纤,设定这类半导体吸收式光纤温度传感器的基本参数,建立了半导体材料ＧａＡｓ的透过率与温度关系的数学模型．采用一种基于双波长原理的输送回路来减少测量误差,研制成功了一套半导体吸收式光纤测温系统．在０～１００℃内进行了实验测试．结果表明,改进后的光纤温度传感器可以替代传统的热电偶在微波场中进行实时测温     

配有半导体温度传感器的数字测温电路

配有半导体温度传感器的数字测温电路孙中禹１余炳绪１李树新２（１空军电讯工程学院实验中心，西安７１００７７；２陕西电视台，西安７１００５４；第一作者，男，３４岁，讲师）常用的测温元件有热偶、热敏电阻和半导体温度传感器等．热电偶具有较高的稳定性，但热电转...     

户式中央空调控制系统温度采集模块的设计

介绍了Dallas半导体公司的单总线温度传感器DS18820的工作原理及其采用的协议规范．阐述了利用DS18820作温度传感器，PIC16F73作主控制器，组成户式中央空调控制系统温度采集模块的基本思想．给出了整个模块的硬件组成和软件设计方案。     

数字PID温度控制实验系统的设计与实现

基于温度传感器,A/D、D/A和MCU集成的温度采集和处理模块,半导体致冷模块,以及串口通信模块,设计开发了适用于半导体激光器的数字PID温度控制实验系统。论文介绍了系统的硬件组成、工作原理和软件开发关键技术,对实验的内容也进行了设计和阐述。     

DS18B20数字式温度传感器的使用方法介绍

科技时代,数据的重要性不言而喻!因为温度传感器被广泛应用于工农业、科学研究和生活等领域,数量高居各种传感器之首。近百年来,温度传感器的发展大致经历了:传统的含有敏感元件的分立式温度传感器、模拟集成温度传感器/控制器和智能温度传感器三个阶段。目前,国际上新型的温度传感器正从模拟式向数字化,集成化向智能化、网络化方向发展。     

一种新型MEMS温度传感器的设计

本文提出了一种新型的多层梁结构的电容式温度传感器。传感器结构部分是由导体（或半导体）/介质层/导体（或半导体）组成的可变电容器。电容的上下极板分别为金属和衬底硅,中间介质层为二氧化硅层。与传统的温度传感器相比,这种结构的测温范围较宽。文中,应用多层梁理论模型分析了传感器的结构,并利用ANSYS有限元分析对模型进行了验证。当多层梁材料参数已知的情况下,选用大面积,低厚度,能够最大限度的提高传感器性能。     

半导体管温度传感器的研究

根据半导体三极管的热敏特性，研制了温度传感器，对其测温原理和电路设计进行了理论及应用的讨论，并将其用于高温脱毒工艺中的温度监控．     

温度传感器的典型应用研究

本文介绍了半导体温度传感器的测温工作原理,以及由ICL7136构成的温度测试仪的测试电路和由AD590构成的温度控制系统电路,给出了克服晶体管温度灵敏度离散性的解决方法.     

硅扩展电阻温度传感器的试制

1.一般介绍由于集成电路在控制系统中的应用日益增长,极大地刺激电子传感器的迅速发展.近年来电子敏感器件的研制进展非常迅速,半导体传感器便是其中一类相当引人注目的电子敏感器件.当前,有些半导体敏感器件已相当成熟,且进入了集成化,但有些仍为分立元件,不少元器件的性能不尽成熟,甚至不少领域仍未被开发.半导体扩展电阻温度传感器便     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-