高校供热网远程监控系统研究

介绍了采用组态软件力控ForceControl 6.0,通过应用GPRS技术和PLC技术实现的高校供热网远程监控系统。该监控系统可实现对整个热网的监测与控制调节,具有实时趋势和历史趋势的分析、历史报表的查询、Web网站发布等功能。结合高校供热的特殊性采用合理的节能策略,可实现高校供热节能目标。     

关于空调楼宇自控设计的体会

楼宇自控需要达到节能、舒适（恒温恒湿）、监视设备运行状态、远程控制设备及灯具。构成系统的主要硬件有通讯网络、局域网、大型模块化智能控制器及小型模块化智能控制器、操作站、信息及报告打印机、网络终端等。主要软件有摘要（各类报告清单）、密码保护、用户编程（图形化编程语言）、状态改变报告、报警信息报告、报告分组／报警管理、监控点历史、动态趋势分析、累积、统计功能、数据库下传/上载功能、设备循环启停保护等。     

基于STM32的绿植生长环境监控系统设计

针对绿植种植需要不同生长环境的特点,提出一种基于STM32的绿植生长环境监控系统．该系统集数据采集、处理、存储、显示为一体,通过无线传输技术进行绿植生长因子闭环控制,并在上位机采用LabVIEW图形化软件对数据进行显示,实时存储数据便于用户随时查看并对植物生长状态进行分析．通过测试分析,该系统基本达到预期效果,可以实现对绿植生长环境的实时监测与控制．     

基于PSA的起动机型汽车启停系统技术探析

针对日益严苛的汽车排放标准和节能需要,对起动机型的汽车启停技术进行研究分析。在传统汽车发动机怠速控制的基础上,增加一套增强型起动机控制的发动机启停系统,达到微混合动力效果。以PSA车型的STT启停系统结构和原理为例,分析启停技术控制策略,探讨启停系统设计方法和思路。     

基于WSN的土壤参数测量系统

针对目前土壤参数测量设备单一,检测参数过少,不能远程实时查询数据等问题,基于无线传感器网络技术,提出了一种基于WSN的土壤参数测量系统.该系统采用CC2530F256作为无线传感器网络主控,利用多传感器感知土壤参数,结合STM32智能网关,移植MQTT协议通过NB-IoT或者WIFI把数据最终传输到OneNET云平台,用户可远程通过PC端网页或者手机APP查看历史数据和土壤实时参数.经测试,该系统具有通信距离远,组网灵活,操作方便且能够长时间稳定工作等优点,具有广泛的应用前景.     

玉华洞风景名胜区旅游资源信息系统设计

本文所介绍的系统是在强大的GIS软件支持下，结合其他图像软件，设计开发而得．该系统不仅具有管理数据、查询统计、资源评价、制图输出等功能，并且可以在网络上发布，用户可在网上查看地图信息．     

基于PLC和WinCC的电热锅炉压力监控系统开发

实验室电热锅炉设备开发了以S7-300 PLC为控制器、以Win CC为组态软件的锅炉压力监控系统,作为PLC控制技术课程实践教学的案例。该文构建了PLC控制系统硬件回路,编写了锅炉压力闭环控制PLC程序,完成了上位机监控界面组态。通过实验调试表明,该系统能够将锅炉压力控制在设定值,上位机具有控制系统启停、设置PID参数和锅炉压力、实时显示压力曲线等功能。     

变压器强油风冷冷却器控制系统启停回路改造

该文通过对以礼河发电厂设备整治改造五年规划中对主变压器冷却器的现场改造调试经验,通过统计对比传统设计变压器强油风冷冷却器控制系统变压器的多年运行温度.注重在设备改造中,既能满足变压嚣的技术要求和现场安全要求,又要达到科学合理、技术先进、安全可靠,降耗节能,提高变压器运行效率为目的.提出了变压器强油风冷冷却器控制系统启停回路改造思路,并进行了实施,取得了较好的效果,以供同行参考借鉴.     

楼宇空调变水量冷媒水系统实时优化控制

为达到节能和优化系统控制的目的，在楼宇空调水系统及其局部控制仿真分析的基础上，针对变流量系统监测点和可调参数较多的特点，提出并验证了3个实时优化控制方案：根据初级和二级冷媒水流量的比率，实时优化多台冷水机组的启／停控制；利用AHU自动控制水阀的阀位信息，实时优化二级水泵的控制；利用AHU自动控制水阀的阀位信息以及二级泵的工作状况，实时优化冷水机组出水温度的控制．结果表明，同常规的控制方案相比，这3个优化控制方案不仅能够不同程度地达到节能的目的，而且还能够改善系统局部控制的特性．     

溴化锂空调监控系统设计与实现

本文基于氯碱化工的实际生产需求，设计并实现对6台溴化锂空调机组的集中监控该系统结构采用Hostlink通讯网络，利用组态王软件实时地采集空调的启停、压力、温度等各种反映空调运行状态的参数，并对空调机组的各种故障及时显示并报警     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that