基于密集烤房温湿度控制仪的设计

针对目前烤烟房温湿度的测量和控制问题，介绍了一种基于密集烤房温湿度控制仪的软硬件设计。系统采用先进的模糊控制技术，使烤房内的温度和湿度按照预存控制曲线变化，并可进行在线修改控制曲线参数，从而提高了烤房内温湿度的控制精度和烤烟质量。     

虚拟仪器技术在湿度测控中的应用

以烤烟房中的湿度环境为测控对象,设计了一个湿度测控系统,包含硬件和软件两个部分,硬件系统包括湿度采集模块、湿度信号调理部分以及湿度控制模块。软件系统采用labview8．6进行设计,包括湿度信号的采集和湿度控制两个模块。经测试,有效的解决的烤烟过程中的湿度的测量与控制这个难点问题。     

分流式标准湿度发生器的研制

为简化湿度仪的标定工作，研制可作为二级湿度标准仪器的湿度发生器．采用分流法制备混合气体的原理，仪器中引入微机控制系统，实现自动温度控制、信号处理、显示、打印等功能．该仪器输出气体湿度稳定，可任意设定输出湿度值，并能显示、打印输出气体露点温度和相对湿度等参数．该仪器满足二级湿度标准仪器的功能指标要求，集湿度源和标准湿度仪为一体，可单独作为二级标准湿度仪使用。     

室内环境监控系统的设计与制作

针对目前室内环境问题,设计了一种以AT89S52单片机为控制器的室内环境监控系统,本系统采用数字温湿度传感器AM2303采集室内温度、湿度信息,MQ-5煤气传感器采集室内煤气信息。方案采用控制继电器来控制空调、加湿器、抽风机的开关。系统通过按键输入需要设定的温度和湿度,用LCD12864显示温度、湿度及煤气的含量。     

基于湿度应力场理论的膨胀土增湿变形分析

应用湿度应力场理论对膨胀土的增湿变形进行了分析,并由无荷膨胀量试验和有荷膨胀量试验确定了相关参数．根据湿度应力场与温度应力场的相似性,利用Ansys软件的热分析功能,计算了膨胀土增湿变形．并通过有荷膨胀量试验的模拟分析,验证了应用温度应力场理论模拟湿度应力场的有效性．     

温室大棚温度湿度自动控制系统设计

该文介绍了了一个温室大棚温度以及湿度的自动控制系统设计：大棚温度湿度自动控制系统由主控制器AT89S51单片机、H104陶瓷湿度传感器、AD590温度传感器等构成,实现对温室大棚温湿度的检测与控制,从而有效提高温室的产量。这个设计的系统具有成本低,同时运行稳定等特点。这个系统首先对室内的温度以及湿度进行采集,接着根据测量的参数对于温度和湿度进行自动调节,最后达到温室大棚的温度、湿度自动控制的目的。     

简易四点分布大棚温湿度检测控制系统

本文介绍了基于AD590温度传感器和电阻式湿度传感器设计的四点温度检测控制电路,通过对大棚四个位置温湿度信息的提取转化为电信号,然后与要求温湿度参数设定的参考值进行比较,进而综合处理个点数据,实现对大棚温湿度的控制。     

辊道窑计算机管理控制平台系统设计

介绍了计算机自动控制和管理窑炉温度的原理、设计和安装工艺及其技术要求,阐述了自动控制和管理温度窑炉的相关设备参数设定及其工艺要求,分析了系统达到窑炉温度自动控制的功能,从而实现生产产品质量提升和能耗降低。     

自主设定温度浇花系统

随着现代生活水平的日渐提高和生活工作节奏的逐步加快，喜欢种植观赏花草的人们迫切需要一种使用方便、省时、省心的浇灌设备。这里设计了一种自主设定湿度浇花系统。该系统以16位的单片机STC89C52为控制核心．通过NE555采集湿度信号与设定的湿度进行对比。     

烟叶复烤温湿度自动控制系统的分析

本文通过对烟叶复烤温湿度自动控制问题的研究分析，介绍了研制的一种用８０３１单片机为控制核心构成的自动控制系统．该系统能实现对温度、湿度的在线检测与控制，参数在线修正，温湿度的打印、显示和超限报警等．     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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-