昕水河流域黄土地貌演化与土壤侵蚀关系研究

本文以昕水河流域的地质构造、地貌格局、新生界松散堆积物特征为基础,以黄土地貌为主体,着重分析了黄土地貌演化与土壤侵蚀的关系,得出了土壤侵蚀的形成与黄土堆积同步进行的结论。     

土壤侵蚀过程中各影响因子的分异及关联分析——以山西省昕水河流域为例

本文以山西省昕水河流域为例,应用R型非线性映射原理,分析了土壤侵蚀形成过程中各影响因子的主次分异及各因子之间的相互关联,得出了导致该流域土壤侵蚀趋于严重的根本所在,能使我们有的放矢地控制水土流失,布设水保措施。     

土壤侵蚀过程中各影响因子的分异及关联分析——以山西省昕水河流域…

本文以山西省昕水河流域为例，应用Ｒ型非线性映射原理，分析了土壤侵蚀形成过程中各影响因了的主次分异及各因子之间的相互关联，得出导致该流域土壤侵蚀趋于严重的根本所在，能使我们有的放矢地控制水土流失，布设水保措施。     

海河流域与水相关的生态环境承载力研究

为实现海河流域的可持续发展,需进行生态环境承载力研究.本文从水资源、生态环境、人口与经济的关系出发,针对海河流域生态环境恶化问题,探讨了与水相关的生态环境承载力的内涵、指标体系;提出时间序列与最优化理论相结合计算生态环境承载力的量化模型;得出海河流域现状处于生态环境严重超载状态;在南水北调、经济常规发展下,到2035年左右达到可承载的良好状态.     

铜矿生态恢复的措施研究

根据泊水河流域矿区生态现状,从充分利用现有采矿度弃地的生态潜力、恢复重建原有生态系统功能的角度出发。在工程恢复和生物修复两方面提出了洎水河流域矿区生态系统恢复的措施,可供同类型矿山借鉴。     

湑水河流域大鲵生境考察

今年暑期,在生物老师的带领下,我们对湑水河流域中的大鲵的生存环境,做了一些考察、分析.城固县境内的湑水河,源于秦岭西北主峰的太白山,由太白县流经洋县,进入城固后汇入汉江,在城固县境内全长约58公里.山区地带42公里,这一段是秦岭南坡的中低山区段,也是湑水河中大鲵分布的主要水域.从《城固县水电局关于湑水河大鲵资源的报告》可知,湑水河中的大鲵至少有23,280条,这个贮量,目前在我省同量水域中是比较丰富的.根据掌握的情况,并征得县水电局的同意,我们在河道中段双溪镇和河道上段小河镇,分别捕到长50厘米、重0.8公斤和长40厘米、重0.5公斤的大鲵     

云南省楚雄市水资源承载力评价

楚雄市位于分水岭地带,水资源量相对不足,时空分布不均,供需矛盾突出,对楚雄市水资源承载力进行评价,有利于楚雄市更加合理的利用水资源,获得经济、社会的进一步发展。在分析楚雄市水资源结构及需水量的基础上,估算了楚雄市理论最大可用水量与楚雄市2007年综合用水量,据此估算出楚雄市水资源的承载力、超载率,并对楚雄市2007年水资源的承载状况进行了评价。2007年楚雄市水资源超载率为-91.07%,说明楚雄市水资源未出现超载现象。     

桥梁超重荷载与限载标准的确定

为了分析公路运营中超重荷载对桥梁的影响,以陕西省府谷-店塔公路上运煤超载车辆为调查对象,根据车辆装载特点和轴型分布特征,将超载车辆分为9种类型,分析了9种车型的超载、超限情况;利用线性回归,得出超载与超限的函数关系.利用等代荷载方法,与公路-Ⅰ级荷载相比较,确定出9种车型的限载系数和限载标准,评价了限载后车辆荷载特性,认为车辆限载后宜使用多轮、多轴运营车型.     

湫水河流域水沙变化现状及成因分析

根据湫水河流域林家坪水文站47年降水、径流、泥沙资料，利用水文法建立的模拟降雨径流模型和降雨产沙模型，在此基础上根据降雨资料建立了模拟天然径流量和模拟天然输沙量序列，对因降水变化和人类活动对河川径流及输沙量的影响进行了定量分析，并根据流域内主要的人类活动类型分析了水沙变化的原因。     

道路超限超载预测的灰色马尔可夫模型

文章针对超限超载预测数据量小、随机性大、影响因素复杂等特点,采用灰色模型预测和马尔可夫预测相结合,提出了一种超限超载预测的灰色马尔可夫预测方法.该方法利用历史信息建立超限超载的灰色预测模型,根据结果把超限超载划分为若干状态,再根据马尔可夫模型建立状态转移模型进行预测.应用该方法对某省的道路超限超载趋势进行了预测,实验表明,由于灰色马尔可夫模型充分利用历史数据信息,模型的预测精度高于灰色模型预测精度,可用于道路超限超载预测.     

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