浅谈矿井排水的自动化集中控制

简述了矿井排水的意义与特点，分析了自动化排水系统的优越性，介绍了自动化排水系统的主要功能。     

矿井排水的自动化集中控制分析

简述了矿井排水的意义与特点，分析了自动化排水系统的优越性，介绍了自动化排水系统的主要功能。     

煤矿自动排水系统的应用

煤矿自动排水系统的应用是煤矿信息化管理的一个主要部分,煤矿自动排水系统的应用将极大提高煤矿生产效率并保障生产安全。介绍了煤矿自动排水系统的组成及工作原理,并对煤矿自动排水系统的预期效果进行了探讨。     

矿井主排水系统设计方法探讨

本文通过对排水设备工作原理的分析,指出了目前矿井主排水系统中存在的缺陷,提出了矿井主排水系统的优化设计方案。通过系统优化,提高自动化水平,不仅可以提高矿井主排水系统的安全性和可靠性,而且可以减小井下巷道工程量。     

兴隆庄煤矿某采区西部防治水措施研究

采区内地质构造较复杂，单斜为主，断层发育，且有古河流冲刷带，水力联系较广泛。根据物探、钻探具体资料及采区的区域地质资料，在充分分析第四系、煤层顶板水文地质条件的基础上，提出了提高开采上限，钻探防水钻孔及布置排水系统等措施，进行采区防治水工作。     

城市给排水系统的规划设计分析

城市给排水系统的规划设计是个复杂的动态的设计过程。完整的规划设计需要协调考虑各方面的因素,本文在分析了城市给排水系统的组成及布局的基础上,对其具体的规划设计中的需要注意的关键方面和原则进行了深入的讨论分析,分析过程对于城市给排水系统的规划设计具有指导作用。     

多级排水系统最优控制模型及分级DP算法

建立了矿井多级排水系统运行最优控制数学模型，为了求解这一多向量最优控制问题，提出了分级动态规划算法；并通过一个例子说明算法的计算过程。     

一种基于PLC自动控制的矿井排水经济改进方案

针对矿井排水工作特点,针对井下水泵控制系统进行改进,通过加入PLC自动控制设备实现了水泵无人值守、自动启停及应急启动,实现了矿井排水系统的经济性改进。     

如何实现矿井排水系统的节能

根据矿井排水系统的特点,从设计选型和流量调节两方面分析了矿井排水节能问题,对改变管路阻力和改变水泵特性调节流量的方法进行了总结归纳,并提出了经济有效的节能方法。     

鄂尔多斯盆地北部中侏罗统沉积相特征及其对中深部矿井涌水量的影响

为了准确预测鄂尔多斯盆地北部中深部矿井涌水量及涌水量变化规律，为矿井排水系统的升级改造和防治水工作提供依据，以典型矿井为例，通过系统研究中侏罗统延安组三段及直罗组沉积相特征和“七里镇砂岩”空间展布规律，结合充水含水层分析、工作面顶板探放水情况及采后涌水量变化规律等，探究沉积相特征对中深部矿井涌水量的影响。研究表明，直罗组一段底部的“七里镇砂岩”对矿井涌水量的影响起主导作用；辫状河河道砂坝沉积是形成厚层“七里镇砂岩”的根本原因；辫状河、曲流河及三角洲平原沉积特征的差异性是造成矿井南北两翼工作面涌水量不同的重要原因。     

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-