三维空间模型的露天台阶爆破专家系统及应用

传统人工布孔设计的爆破模式效率较低,无法适用于大规模的爆破工程,因此,研制了露填台阶爆破专家系统.把爆破台阶地形转化为三维空间模型,将台阶爆破设计原理和智能设计相结合,研制出智能系统,实现了自动布孔、多种装药结构选择及快速爆破网络设计等目标,并应用于中煤集团平朔东露天矿的台阶爆破.结果表明：专家系统所设计方案与人工方案相比较,实现了减少大块率,控制前冲、后翻,控制飞石距离,减少爆破冲击等目的,实际应用中验证了露天台阶爆破专家系统可行.     

专家系统在确定露天矿台阶爆破参数的应用

露天矿台阶爆破质量的好坏，对后序作业有很大的影响，因此对现场爆破技术人员的素质有很高的要求。结合我国矿山的实际情况，从理论上综合利用人工智能原理，模糊数学，数据库及多目标决策，开发出一个适合我国特征的确定露天矿台阶爆破参数的专家系统。此系统不仅能够进行露天矿台阶爆破的设计，同时也可以用来训练爆破技术人员。     

基于ANSYS/LS-DYNA的台阶爆破超深的影响因素分析

台阶爆破经常会产生根底现象,造成爆破不彻底,为后续工序留下麻烦。为了提高生产效率,取得良好的爆破效果,如何获得台阶爆破的最佳超深就成了爆破工作者的追求,超深对于消除台阶爆破根底,改善台阶爆破效果有着决定性的影响。本文运用有限元仿真软件ANSYS/LS-DYNA,建立台阶爆破分析模型,设计爆破参数,分析对比无超深和有超深两种情况下的爆破效果。计算结果表明:超深是消除爆破根底的有效途径之一,合理的超深对台阶爆破的效果有很大影响。研究结果可为实际爆破工程提供参考。     

台阶清碴爆破孔网参数智能选取

应用模糊神经网络模型对台阶清碴爆破孔网参数进行智能选取，增强了设计孔网参数的可靠性和爆破设计的合理性．该方法从爆破实例中获取经验知识并应用，克服了人为因素的干扰，取得了符合实际的结果，为选择爆破控制参数和取得良好的爆破效果提供了依据.     

台阶爆破模糊神经网络智能设计

为了提高爆破参数设计计算的准确性,在台阶爆破设计中,应用了模糊神经网络模型选取孔网参数的方法.模糊神经网络是人脑的模型,是取模糊推理系统与神经网络两者之所长融合而成的新技术.应用模糊网络模型对台阶爆破进行智能设计,结合了计算机和专家各自的优越性,从以往的爆破效果良好的实例中获取专家经验知识,应用专家知识选取爆破参数,可以取得良好的爆破效果;从而实现了智能设计,增强了设计的可靠性,提高了生产效率,为生产爆破提供了可靠的依据.     

露天台阶爆破设计方法探讨

露天台阶爆破在国民经济建设中具有广泛的应用,在煤炭、金属矿、建材矿山等工程领域,爆破方法是破碎矿岩的主要手段。结合国内外露天台阶爆破设计方法与工程实践,总结了露天台阶爆破的钻孔形式、布孔方式和爆破参数的设计计算方法,并应用于工程实例中,为露天台阶爆破设计提供一个参考。     

中深孔台阶爆破法在珠海临港东大堤北段工程中的应用

中深孔台阶爆破法已被广泛运用在建设工程施工中，但爆破施工中的一些细节往往容易被忽略。然而就是这些细节决定了爆破的效果、经济效益以及管理的顺畅，下面介绍中深孔台阶爆破法在工程施工中应用的一些体会，可供参考。     

大法坪砂石料场爆破总结分析

从爆破设计、爆破安全技术及预防和成本控制等3方面对龙滩水电站大法坪砂石料场高程爆破进行了分析。目的是为了优化爆破参数，满足系统生产对爆破效果和粒径级配的要求。保证爆破安全以及文明施工，同时降低成本。     

露天矿多排孔台阶爆破块度计算模型研究

本文以哈里斯数模为基础，提出了一种露天矿多排孔台阶爆破块度计算模型，定量地建立了爆破参数与爆破块度间的关系，并用此模型编制了计算机程序。经用小台阶爆破实验数据验算，其电算所得理论块度分布与实际爆破块度分布吻合较好     

光面爆破效果BP神经网络预测

介绍了BP神经网络的基本原理，基于Matlab工具箱建立了预测光面爆破效果神经网络模型，从岩石力学性质，周边爆破参数两个方面对光面爆破效果进行分析和预测。为了加快神经网络模型的收敛速度。增强其跳出局部极小点的能力，采用了附加动量法和自适应学习速率结合的方法对网络进行训练，利用该模型对光爆效果进行了预测。取得了很好的效果。     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with