秦皇岛市农田杂草的种类与生育期

实地考察了秦皇岛市下辖的三区四县 (北戴河区、山海关区、海港区、昌黎县、抚宁县、卢龙县、青龙县 )农田杂草的种类、分布、危害及主要杂草的生育期。秦皇岛市有农田杂草 5 3科 15 8属 2 4 4种 ,其中恶性杂草 6科 11属 12种 ;寄生性杂草 1科 1属 4种 ;普通性杂草 4 6科 14 1属 2 2 8种。列出了秦皇岛市农田杂草名录。     

山西有毒植物资源研究

据调查山西地区有毒植物共计 6 8科 ,15 4属 ,2 19种 ,其中蕨类植物 3科 4属 6种 ,裸子植物 4科 4属 5种 ,被子植物 6 1科 146属 2 0 8种。根据植物所含有毒物质化学成分的不同将有毒植物分为 7类 :(1)含非蛋白氨基酸类植物 4种 ;(2 )含肽类化合物类植物 5种 ;(3)含生物碱类植物 92种 ;(4 )含萜类化合物类植物 2 2种 ;(5 )含甙类化合物类植物 85种 ;(6 )含酚类化合物类植物 39种和 (7)含无机化合物和简单有机物类植物 12种。最后提出了有毒植物的保护利用对策。     

太行山南段野生植物资源研究

太行山南段拥有丰富的野生植物资源,据调查统计有种子植物125科,456属,974种（含变种）,按其经济用途将它们分为12类,其中,1.纤维植物98种;2.油脂植物147种;3.芳香植物66种;4.鞣料植物65种;5.淀粉植物98种;6.果树植物136种;7.密源植物88种;8.饲料植物166种;9.药用植物426种;10.农药植物72种;11.野菜植物68种;12.观赏植物239种.此外,对该区野生植物的开发利用和保护提出了建议.     

习水国家级自然保护区药用植物资源考察

通过多次深入贵州习水国家级自然保护区药用植物资源考察,现已初步确定习水国家级自然保护区有药用植物资源185科687种,其中菌类植物6科17种,地衣植物5科7种,苔藓植物5科5种,蕨类植物38科119种,裸子植物5科9种,被子植物126科530种。对该地区药用植物的保护利用及可持续发展提出了建议。     

秦皇岛市滨海地区观赏种子植物资源及其多样性

对秦皇岛市滨海地区观赏种子植物资源及多样性进行调查。结果表明,秦皇岛市滨海地区有观赏种子植物资源88科、273属、489种。其中,裸子植物28种,被子植物461种;园林观赏植物226种,野生观赏植物263种。观形植物、观花植物、观叶植物和观果植物分别占植物种数的54.81%,44.33%,22.29%,11.54%,有乔木、灌木、一二年生草本、多年生草本等4种生长类型。对秦皇岛市滨海地区植物景观营造提出了建议。     

广西地区蝇类研究(双翅目)

共记录了广西地区有瓣蝇类 4科 2 9属 69种 ,其中花蝇科 2属 2种 ,厕蝇科 1属 1种 ,蝇科1 1属 47种 ,丽蝇科 1 1属 1 9种 ,并发现 2个新种 (2、5 2号待发表 )、1个中国新记录 (4 3号 )和 8个省新记录 (5、6、1 3、2 0、46、5 9、67和 68号 ) .     

广西那坡县种子植物区系科属地理成分的分析

那坡县位于广西西南部 ,东经 10 5°31′～ 10 6°5′ ,北纬 2 2°5 5′～ 2 3°32′之间 ,处于滇、越、桂三地交接带 ,属古热带植物区北部湾地区的一部分 ,其地理位置特殊 ,植物种类极其丰富 ,有种子植物 174科 889属 2 2 0 1种。科、属的分布区类型分析表明 ,科的分布区类型以热带 -亚热带分布科所占比例最大 ,一些主产热带的科 ,如兰科、桑科、茜草科 ,荨麻科、番荔枝科等在本区系中有着丰富的属种 ;属的分析显示热带亚热带分布占70 9% ,其中又以热带亚洲分布最多 ,占 2 7 6 % ,其次是泛热带分布 18 8% ,热带分布远多于温带分布 (5 5 4∶2 15 ) ,显示出明显的热带北缘性质 ,具有热带向亚热带的过渡性。     

延安市校园有毒植物的调查及园林应用

为了使人们更好地认识和使用有毒植物,笔者对延安市校园有毒植物资源进行了调查与研究。初步统计延安市校园有毒植物共有66种,隶属42科。其中蕨类植物有1科1种;裸子植物4科5种;被子植物有37科60种,其中双子叶植物31科50种,单子叶植物6科10种。本文分析了这些有毒植物的特点、毒性等,并就其园林应用提出建议。     

山西晋祠公园藻类植物的初步研究

对山西晋祠公园的藻类植物进行初步研究,经鉴定,共有藻类植物47种,隶属于6门,17科,24属.其中,硅藻门种类最多,共计30种,隶属5科10属;其次是绿藻门,有8种,隶属7科7属;再次为蓝藻门,有3种,隶属2科3属;黄藻门3种,隶属1科1属;轮藻门2种,隶属1科2属;最后为红藻门有1种,隶属1科,1属.     

长白山区外来入侵植物的初步研究

经过三年的调查和查阅参考文献 ,确定长白山区外来的入侵植物共有 2 4科、5 0属、5 6种 ;来源于世界各地的入侵植物有 1 6科、36属、4 2种 ,其中 3种为有害检疫杂草 ;来源于国内其它地区的有 1 3科、1 4属、1 4种 .分析研究了外来入侵种对长白山区诸方面产生的影响及入侵的途径 ,提出了一些具体的管理措施 .     

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     

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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