四川大头茶种子种群动态研究

从种子雨、种子库和幼苗库几方面调查了四川大头茶种子种群的动态规律及种子种群对群落的贡献．结果表明，四川大头茶种子种群仅存在于当年７月至翌年３月，于８月初达到年高峰值；四川大头茶土壤种子库属于Ｔｈｏｍｐｓｏｎ和Ｇｒｉｍｅ定义的第Ⅲ类型，野外条件下大头茶种子寿命不超过１年；种子种群对不同群落的贡献有极显著的差异，即大头茶纯林内仅有１．７９％有活力的大头茶种子萌发并定居，而马尾松、大头茶混交林内相应则有４．０８％（仅指研究末期）．     

不同地理种源及演替群落的四川大头茶个体水平上种子形态分化研究

测定了来自不同地理种源及演替群落的四川大头茶8个居群112株个体各50枚种子的10项形态指标，然后用主分量分析法，主因子分析法，系统聚类法特等数量分析方法研究了四川大头茶种子在个体水平上的形态分化。结果表明，四川大头茶种子形态在个体水平上，不论是居群间还是居群内均有一定程度的分化；种子形态分化的规律由大到小的顺序为：不同群落类型居群间分化，不同地理种源居群间分化，同一地理种源的居群间分化，同一居群内不同小居群间个体分化，小居群内个体间分化，造成形态差异规律的原因与四川大头茶的分布特征，土壤因素及气候因子均有较大关系。     

关于植物自疏过程的一般模型

根据植物群体在自疏过程中植株高度与横径比值的变化和植株所占空间中茎枝叶分布密度变化的模式，推导出描述平均个体生物量和植株密度之间数量关系的一般模型。指出由日本生态学家Ｙｏｄａ提出的－３／２方自疏法则只适合描述特定条件下的自疏过程。通过对一般模型的分析，阐明了自疏指数赖以变化的生态学机制，并给出了自疏过程的测度方法。     

缙云山森林土壤酶活性的分布特征,季节动态及其与四川大？…

研究了重庆北碚缙云山生态系统中４种群落的４种土壤酶活性的分布特征，季节动态及其与四川大头茶（Ｇｏｒｄｏｎｉａａｃｍｉｎａｔａ）的关系，结果表明：（１）土壤酶活性具有明显的层次性，即Ａ（腐殖质层）〉Ｂ（沉积层）〉Ｃ（母质层），４种土壤酶活性之间，及其与土壤理化性质之间存在不同程度的相关；（２）Ａ，Ｂ两层的４种土壤酶活性的均以含四川大头茶的群落最高，在不含四川大头茶的群落中，以常绿阔叶林高，在含四川大     

大头茶种群的格局分析

将异龄结构的大头茶种群划分为各部份功能群进行研究,得出结论如下:大头茶种群个体数量分布格局主要由苗木群格局决定,种群生物量格局由大树群格局决定;影响大头茶种群格局的因素主要是:①大头茶的强萌生性和弱散布性;②环境因子格局.     

磷资源有效性对四川大头茶幼苗构件生长的影响

通过人工控制４种磷肥浓度０ｇ／ｋｇ（Ｐ０）,１ｇ／ｋｇ（Ｐ１）,２ｇ／ｋｇ（Ｐ２）、４ｇ／ｋｇ（Ｐ３）,研究探讨磷资源有效性对５年生四川大头茶功苗构件生长的效应,结果表明：不同磷肥浓度强烈影响了四川大头茶幼苗茎高、叶数、叶面积和叶大小生长动态;随着磷肥浓度的增加,叶片现存数,叶面积显著增加,地上生物量和根系生物量也逐渐增加,并以叶,中根和细根的生物量增加程度最为突出;主分量分析反映了Ｐ３与Ｐ０的四川大头茶幼苗生长之间存在巨大差异,并反映了构件特征之间具有极大的相关性。     

四川大头茶过氧化物酶和细胞色素氧化酶同工酶变异的数量分析

运用同工酶电泳技术，测定了来自不同地理种源和不同演替群落的四川大头茶（Gordonia acuminata(pritz)Chang)8个居群112株个体功能叶片的过氧化物酶（POD），细胞色素氧化酶（CYT）的同工酶谱带，并进行编码；然后采用Rogers-Tanimoto结合系的组平均法（UPGMA）对各酶谱带进行聚类分析；结果表明：来自不同演替群落的四川大头茶居群及个体间存在着极明显的同工酶变异和遗传分化，来自相同演替群落的居群及个体间存在着极大的同工酶谱相似性和遗传相似性；环境因子在四川大头茶居群遗传分化过程中起着非常重要的作用；但不同的环境因子在不同居群的同工酶谱和遗传分化中所起的作用不同；群落演替类型对四川大头茶的同工酶谱和遗传分化起着重要作用的同时，地理种源却对该物种的同工酶谱和遗传分化影响不大。     

四川缙云山大头茶与森林优势种群间联结性研究

基于２×２联列表，应用方差分析、Ｘ￣２统计检验、Ｏｏｎａｉ指数、Ｊａｃｃａｒｄ指数等系列技术，对四川缙云山大头茶（Ｇｏｒｄｏｎｉａｃｕｍｉｎａｔａ）与缙云山森林优势种群在演替系列群落中的联结性进行了研究．结果表明，种对间的联结性质和程度是随着群落演替的进展而发生变化的，这也正是生境条件优化和多种群相互作用，占据各自生态位的动态过程．只在常绿阔叶林中，大头荣与栲树、润楠间表现出极显著负联络；与白毛新木姜子、银木荷间存在极显著正联结，与小叶栲、虎皮楠间表现出显著正联结．     

四川大头茶种群优势度增长动态的初步研究

用有限空间种群增长的逻辑斯谛模型探讨了四川缙云大头茶种胸硐面积的增长规律结果是：大头茶种群在不同林分密度下的纯林中，其胸面积最大增长速度是中密度〉高密度〉低密度，达到最大增长速度的径极范围都在１８ｃｍ左右，在不同林型中，大头茶种群胸面积的最大增长速度是纯林最大，常绿阔叶林次之，针阔混交林最小，达到最大增长速度的时间以针阔混交林最长，常绿阔叶林次之，纯林最短，还讨论了大头茶种群在不同林分密度下，不同     

海南岛无翼坡垒种群调节研究

通过对无翼坡垒种群的两个高度类群的个体群的高度与密度关系，以及种群生物量与种群稀疏规律的研究，基本上掌握了种群的调节规律．该种群３ｍ高以下的个体群高度与密度的关系为Ｄ１＝０．７９１０２６Ｈ１（－１．１８７１６），３ｍ高以上的个体群相应的关系为Ｄ２＝１．８３２５２Ｈ２（－２．２６７８２），种群生物量基本上符合Ｌｏｇｉｓｔｉｃ增长，种群稀疏规律Ｂｍｆ＝０．０２４８Ｄ（－１．４２０４）．说明无翼坡垒种群调节的因素是种群密度，稀疏过程主要是自疏过程，他疏程度小，但却是一个必须引起注意的因素．     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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-