东昌府区草本野生植物资源调查研究

东昌府区草本野生植物资源丰富．对所调查的具有重要开发利用价值的110种草本野生植物进行了植物分类学统计和开发利用评价，同时阐述了东昌府区草本野生植物资源的开发利用前景．     

历山自然保护区菊科野生植物资源研究

对历山国家自然保护区的菊科野生植物资源进行了调查研究.结果表明:该保护区有菊科野生植物44属、78种(包括变种2);其单种属最多,而以寡种属植物优势最强;生活型以多年生草本为主.着重介绍了该保护区菊科野生植物资源在药用、食用和观赏等3方面的经济价值,并就其资源的开发利用提出了相应的建议.     

保护野生植物的重要性及措施

为了保护、发展和合理利用野生植物资源，保护野生植物多样化，维护生态平衡，是目前林业部门对野生植物保护和利用的一项尤为重要的工程。文章对保护野生植物的重要性及措施进行了探讨。     

南京重点保护野生植物资源调查初报

对江苏省南京市重点保护野生植物资源进行了全面调查。记录南京地区重点保护野生植物总计12种,其中国家级重点保护野生植物2种(秤锤树、榉树),省级保护野生植物10种,对重点保护野生植物的分布、生境种群数量及濒危原因等进行了分析,结果表明,旅游活动等人为因素破坏干扰原生境为其致濒的主要原因。     

保护野生植物 促进生态平衡

保护好野生植物,发挥野生植物保持水土,涵养水源的各种生态功能,利用野生植物的经济价值,是大自然留给人类的宝贵资源。对维护生态系统平衡和稳定具有十分重要的意义。论述保护野生植物增强森林的土壤肥力和病虫害防治。     

金川县竹厂沟自然保护区综合评价体系初步研究

金川县竹厂沟自然保护区总面积51089．5公顷，保护区活立木总蓄积2038460立方米，野生动植物资源相当丰富，群落结构良好，国家一、二级重点保护和省级重点保护野生动物及国家一、二级重点保护野生植物种类较多，并具有相当重要的保护价值、科研价值。该文在科学考察的基础上，对保护区的自然生态、管理、效益等因素进行了科学评价，为自然保护区的建立和建设提供了可靠依据。     

山东省首次发现国家二级重点保护野生植物——金荞麦

首次报道了山东产国家二级重点保护野生植物金荞麦,详细描述了其识别特征,进一步探讨了其分布原因、应用价值及生存现状等.     

海州露天矿排土场野生植物侵入状况

在海州露天煤矿排土场野生植物侵入种类、频度、规律调查的基础上,研究了野生植物的侵入对海州露天煤矿排土场土壤基质的影响,分析了主要野生植物群落的多样性并对其演替趋势进行了预测.研究表明,野生植物的入侵改变了排土场土壤理化特性及土壤基质微生物区系,野生植物的侵入有利于再种植,且生物多样性指数、生态优势度与均匀度直接影响植被稳定性.该研究为排土场复垦中土壤基质改良、植被的选择奠定了基础.     

酸浆的化学成分分析及其利用价值的研究

酸浆是我国常见的野生植物，但一直都是自然栽培。本文从酸浆的药用价值和食用价值的角度阐述了酸浆的经济价值，进而提出改良酸浆果实，开发酸浆的新见解。     

内蒙古地区蒙古族常用野生植物相关传统知识研究

蒙古族利用野生植物的相关传统知识对生物多样性保护有重要的作用.本文通过文献研究和田野调查的方法,对蒙古族传统利用野生植物遗传资源及相关传统知识进行了调查、整理、编目和研究.结果显示:(1)蒙古族传统利用的野生植物主要有156种,隶属46科99属,其中百合科、禾本科、蔷薇科、杨柳科、菊科、豆科植物较多;(2)蒙古族的野生植物利用传统知识主要体现在传统利用方式的多样性,主要的利用方式为饲用、食用、工艺用、文化用和兽药用五大类.分析认为蒙古族对其野生植物资源的过度利用情况严重,与之相关的传统知识也面临丧失的威胁.针对此问题,本文从政治、经济、文化等角度提出了合理开发蒙古族地区野生植物资源和加强民族传统知识保护与传承的建议.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

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