四川主要森林植被地理学

四川省位于东经97°21′——110°12′,北纬26°03′——34°19′之间,应属于亚热带地区。由于本省境内地形的差异,川西为高原山地与高山峡谷(即横断山地的北部),川东为盆地,大气环流受到影响。西部高原山地成为季风高原山地气候,川东为亚热带湿润气候,川西南为干湿交替的西南季风气候。地貌与气候的复杂化,特别是植物区系非常丰富,约一万种,因而使森林的类型。结构和分布复杂化。四川是我国三大林区的一部分,森林资源丰富,研究本省的森林具有重要的意义。     

江苏省哺乳类区系的分布和地理区划

一、前言我们于1959至1964年在江苏省对野生哺乳动物进行调查,翻查结果已作报告。本文拟就本省哺乳动物区系的分布及地理区划加以初步的分析和探讨。二、自然地理条件1.地理位置和地形江苏省(包括上海市)位于北纬30°42′～35°7′,东经116°18′～122°10′之间。东临黄海,东海,北接山东省,西邻安徽河南二省,南连浙江省。全省面积107300平方公里。本省大部分为平原,地势西高东低。河道纵横,湖荡密布。长江横贯本省,将本省划为     

黔南州水电建设概况

黔南布依族苗族自治州位于贵州省南部，地处东经106°12′至108°18′，北纬25°04′至27°29′，辖独山、平塘、荔波、三都、瓮安、贵定、龙里、惠水、长顺、罗甸10县和福泉市、都匀市，总面积26197平方公里。     

湘西自治州土壤中微量元素有效态含量、分布及相互关系

<正>湘西土家族苗族自治州位于云贵高原东侧,湖南省西北部,即北纬27°44′至29°47′,东经109°27′至110°55′之间,属由西向东遂降的第二阶梯,以中低山,中山为主的丘、岗、平交错分布的山地山原地貌.土壤按母质来分,可分为板页岩、石灰岩、紫色砂、页岩、古河床河流冲积物等.本文就Cu、Zn、Fe、B、Mn、M_o等六种元素有效含量、分布及其相互关系进行分析.     

台湾植被类型分类系统

台湾是我国神圣领土,位于祖国大陆东南海上,地处东经119°18′至124°34′,北纬21°45′至26°56′,总面积35990km2,包括附属岛屿,最大的为澎湖列岛面积127km2。全境多山,约有2/3面积属于山地,最高为玉山海拔3950m,西部为宽广平原,东部山地间有狭长的台东平原。北部属亚热带南部属热带季风气候,年均温21 7°℃,年雨量1750—2100mm。由于具有高温多雨的优越条件,为台湾提供了丰富的植物资源,植物区系约有190科1180属,超过4000种;植被类型北部属亚热带季雨林,南部属热带季雨林和热带雨林。依据台湾植被的群落学特征,生境特征及生产利用特征,作为植被类型的分类依据,将台湾植被划分为11个类型31个群系纲和108个群系。     

浙西龙王山植被在地带性植被中的地位探讨

龙王山位于浙江西北部的安吉县境内,紧邻临安天目山,北纬30°22′,东经119°27′。它是天目山脉的主要山峰之一,主峰海拔1587.4m,比西天目山略高,整个保护区的面积为1.8万亩。通过对龙王山植物区系、群落特征、气象资料以及栽培植物的分布状况等方面的分析,论证了龙王山植被倾向于中亚热带性质,并肯定其向北亚热带过渡的过渡性地位。     

台湾植被类型分类系统

台湾是我国神圣领土,位于祖国大陆东南海上,地处东经119°18′至124°34′,北纬21°45′至26°56′,总面积35990km2,包括附属岛屿,最大的为澎湖列岛面积127km2.全境多山,约有2/3面积属于山地,最高为玉山海拔3950m,西部为宽广平原,东部山地间有狭长的台东平原.北部属亚热带南部属热带季风气候,年均温21.7°℃,年雨量1750-2100mm.由于具有高温多雨的优越条件,为台湾提供了丰富的植物资源,植物区系约有190科1180属,超过4000种;植被类型北部属亚热带季雨林,南部属热带季雨林和热带雨林.依据台湾植被的群落学特征,生境特征及生产利用特征,作为植被类型的分类依据,将台湾植被划分为11个类型31个群系纲和108个群系.     

井冈山地形的初步探讨

一序言井冈山大约介于E113°50′——114°20′和N26°30′——27°00′间,江西省的宁冈、遂川、永新和湖南省的酃县等四县交界处的一座大山。它东西长达50公里,南北宽约35公里,面积为1021。34方公里,属南岭向北延伸的支脉——罗山脉的中段。早在1927年10月,毛主席就在这里点燃了星星之火,建立了第一个革命根据地,把中国革命引向了正确的发展道路;同时也是毛主席和朱德同志伟大会师的地方。现在山区人民又在党和毛主席的英明领导下,高     

安徽国土资源的特点与国土整治

安徽省位于我国东部,地处北纬29°41′—34°38′及东经114°5°′—119°37′之间。面积13.9万平方公里,人口5000余万。一、安徽国土资源的基本特点国土资源包括自然资源和社会经济资源。安徽省域面积偏小,只占全国土地总面积的1.45％,在各省(区)中居第23位。但因地理位置优越,地质过程复杂,地貌类型多样,气候温和湿润,河流、湖泊众多,开发历史悠久,国土资源比较丰富,当然也存在一些不足之处,可概括为以下几个特点。 (一)类型多样安徽国土资源类型多样,除无海洋资源及海涂(土地资源组成之     

南半球的“岛大陆”——澳大利亚

古希腊时代的先哲曾认为,南半球一定有一块与北半球相对应的大陆,他们把它叫做"未曾确认的南方大陆".但是,直到十七世纪时,航海家才证实这块大陆确实存在.这就是今天的澳大利亚.当然,那时人们还不知道,在地球的正南方还有一块南极大陆,比澳大利亚还要遥远."被遗失时代的博物馆"澳大利亚位于南纬10°41′至43°39′和东经113°9′至153°39′之间.英国人把澳大利亚俗称为"脚底"(Down Under),因为在英国人     

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     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has