亭南煤矿微震监测数据与工作面涌水量关系研究

矿井水害事故的发生,不仅会影响矿井安全生产,造成巨大的经济损失,还严重威胁着井下工作人员的生命安全。为了解决矿井水害的威胁,有效预防水害事故,分析微震监测数据即微震事件数与事件能量级与矿井涌水量之间的相关关系,提出不同时期根据微震监测数据预测矿井涌水量,合理选择排水设备,预测突水事故,达到及时预警的效果。以亭南煤矿二盘区207工作面为研究对象,分析其工作面涌水量与微震数据间的相关性,结果表明:微震事件数、能量级与涌水量呈正相关关系,两者变化趋势基本相同,能够根据微震数据的变化预测涌水量的变化。     

循环载荷作用时不同实验条件下砂岩的声发射特征实验研究

通过循环载荷作用时不同位移速率、不同上限应力、不同下限应力以及不同水饱和度等实验条件下砂岩的声发射特性实验研究,探讨了循环载荷作用时不同实验条件下岩石的破坏损伤演化规律。研究结果表明,上限应力、下限应力、水饱和度等对岩石在承载过程中所发生的声发射事件数均有不同程度的影响,但位移速率对岩石在承载过程中所发生的声发射事件数的影响似乎不大。     

作业现场安全监督精益化研究

当前电网企业面临着巨大的安全生产压力,生产任务繁重,形势严竣。通过实施作业现场安全监督精益化研究,提高月度无违章作业现场比率,大大减少了作业现场违章件数,杜绝事故发生。     

浅谈人的行为和物的状态对安全造成的影响

安全与不安全是相对的概念，事故与安全生产也是相对的事件。这里所说的事故指发生在生产过程中，违背人们意愿且又失去控制的事件。具体到生产活动中，事故是要构成人体伤害或造成财产损失的。虽然，人们并不希望发生任何事故，但是，事故却总是在人们对危险因素控制不力，危险趋势不可遏制后而突然发生。     

煤矿坠仓事故原因动态分析与防治对策

针对煤矿坠仓事故危害严重和目前研究欠缺的情况,利用事件树分析法,对煤矿坠仓事故从事故发生的初始事件、后续事件直至事件结果的全过程进行了全面、动态的分析,分析初始事件可能的发展过程及可能的事件结果,并编制事件树,通过分析事件树中存在的事故连锁、成功连锁,研究导致事故的原因和保证工人安全生产的途径,并在此基础上提出全面、科学的防范措施,以防止类似事故的发生.     

基于贝叶斯方法的高含硫井口气液分离器动态风险分析

传统的定量风险分析方法不能有效利用井口分离器的运行状态数据进行动态风险分析,从而导致评估结果易于偏离实际。构建事件树模型模拟分离器异常事件的发展过程,然后基于贝叶斯方法利用事故先兆数据动态分析分离器安全屏障的失效概率和异常事件后果发生概率,并采用模糊损失率的方法量化事故后果造成的损失,进而完成对分离器的动态风险分析。结果表明,新提出的基于贝叶斯方法的高含硫井口气液分离器动态风险分析方法克服了传统风险评价方法的不足,可动态评估事故发生概率,并可动态反映分离器的风险变化,能够为高含硫井口气液分离器等相关设备的风险分析与控制提供参考。     

岩石张拉、剪切裂纹划分方法及其在岩爆前兆中的应用

提出一种利用支持向量机划分张拉裂纹和剪切裂纹的方法,采用巴西劈裂试验和直剪试验的验证结果证明该方法合理有效。在此基础之上,对砂岩应变岩爆全过程裂纹类型进行划分,并分析各类裂纹事件数、事件增长速率及占比变化规律。研究结果表明：岩爆全过程经历张拉裂纹主导、张拉和剪切裂纹共同作用、岩爆发生3个阶段;在岩爆时刻前张拉和剪切裂纹都出现突增的现象,且张拉裂纹事件增速大于剪切裂纹增速,但张拉裂纹累计占比下降、而剪切裂纹累计占比上升。岩爆前张拉裂纹累计占比下降的现象早于裂纹事件数和事件率突增的现象,且具有较强的前兆响应能力,可作为岩爆的一种前兆特征。     

氯乙烯生产过程中危险化学反应工艺过程的辨识

化工生产过程危险因素众多,对化工生产过程的安全性分析就是要找出生产过程中可能导致事故的潜在的危险源,在危险源辨识的基础上进行风险分析,从而制定有效的措施,实质上是对化工生产过程进行安全性评价。     

基于ALOHA的氯乙烯储罐泄漏事故模拟研究

为控制危险化学品泄漏引发的事故危害,提高化工生产本质化安全,以天津市滨海新区某化工厂氯乙烯储罐为例,在事件树方法预测其泄漏后果的基础上,分析各后果发生的可能性,利用ALOHA对其后果影响范围进行模拟,得到可能事故场景下的氯乙烯毒气扩散区域、闪火可燃区域和蒸汽云爆炸超压冲击波影响区域,结果表明:毒气扩散事故影响范围最广,蒸汽云爆炸事故冲击波影响后果最严重。根据卫星云图对影响范围进行实地拟合,按照事故后果严重程度划分不同级别的警戒区域,针对各级别提出切合实际的日常管控措施和应急救援对策。该研究为氯乙烯泄漏事故预防管理和救援处置提供有效信息,为危化品泄漏事故的预防管控提供新方法和新思路。     

输油调度常见事故及防范措施

管道运输因运输量大、连续、迅速、经济、安全、可靠、平稳及自动控制程度高等优点而成为国内外油品输送的主要方式.近年来我国输油管道技术的发展速度突飞猛进,而输油调度在油品输送过程中,对现场设备进行控制并对各运行参数进行监控,在管道输送过程中起着中枢神经的作用.随着管道快速发展,管道输送过程中也会不可避免地遇到各种各样的生产事故,在调度日常工作中常见的有憋压,混油,冒罐等事故,为了便于生产人员真正吸取以往事故、事件中的经验教训,在日常生产运行过程中杜绝类似事件的发生,确保生产安全,特列举近年来某管道生产过程中发生的典型生产事故、对其发生的原因进行分析并提出防范措施,尽量减少或避免今后此类事故的发生.     

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-