1995—1996年6—12岁学生龋齿患病调查

据有关资料报道，目前小学生龋齿患病逐年增高，已引起各界的重视并列为重点防治的一种疾病，现将我县孙吴镇1995年至1996年6至12岁学生龋齿患病调查情况报告如下：一、对象与方法1、对象1995至1996年本镇6至12岁学生，包括学前班学生，两年共查6所小学校，3101名学生，受检率为94．39％。2、方法我们用普通口腔科龋齿检查方法，检查每个牙齿，查出龋洞即患病，进行记录。二、调查结果1、基本情况1995年6至12岁镇内学生总数为1763人，检查人数为1740人，受查率为98．69％，检出患病人数为955人，患病率54．89％，1996年6至12岁镇内学生总数…     

1996年中国科技期刊排行表

综合类：说明：1．中国科学引文数据库在连续两年公布《被引频次最高的中国科技期刊100名排行表》的基础上，为使统计数据的排列从多种角度反映科技期刊状况，特从1996年开始按学科编制《中国科技期刊排行表（按被引频次和影响因子排序）》。2．被引频次是在对被中国科学引文数据库1996年582种来源期刊所引用的数千种中国出版的中英文期刊进行频次统计后编制而成．3．影响因子的计算方法如下：1996年引用1蚊4年和1叩5尔该刊刊载个市的段外教1994牛和1995早该刊刊载论文的总次数本表中1996年的影响因子是在对中国科学引文数据库1994－1995年…     

广东省R＆D经费发展趋势分析与预测

一、广东省R&D经费的发展趋势 2000年广东省R&D经费高达1071亿元(见表1),是1991的30倍,R&D经费占GDP比重也由1991年的0.2％增长到2000年的1.1％,达到一个新高度。但1991年以来的R&D经费增长并不稳定,1995年增长速度为-13.71％,1996年的增长速度则高达83.73％。以1995年为界,可以将广东省R&D经费的发展分为1991-1995年的起步阶段和1996-2000年的快速发展阶段。     

红栀子白纹羽病发生规律及综合防治

通过对红栀子根部病害的调查、室内保湿培养、病原菌分离鉴定，结果表明：引起红栀子黄叶、枯梢甚至于死亡等明显症状的主要病原菌为白纹羽病菌(Ruselliniu necutrix褐座坚壳菌)。病害在低洼潮湿或排水不良的高温季节，5—8月蔓延很快，药剂防治试验以40％五氯硝基苯粉剂500倍、25％果病克星乳油800倍防治红栀子白纹羽根部病害90天后相对防治效果分别为77．6％和73．2％。     

梭鲈的繁殖

1981～1983年,芬兰水产科技工作者于梭鲈的繁殖季节捕获亲鱼,采用人工催产诱导产卵的方法获得成功,产卵率达25％～37.5％。 我国新疆福海县水产局技术推广站于1992年获得梭鲈工人繁殖成功,并将鱼苗推广到北京、天津、武汉、蚌埠、济南、青岛、威海和辽阳等地试养。 北京市水产研究所于1995年～1996年间先后三次从新疆福海县引进梭鲈亲鱼几十尾,于1996年4月进行梭鲈人工繁殖并获得成功。     

陕北枣树主要病害及其防治研究

1996— 2 0 0 2年对陕北枣产区病害进行调查和鉴定 ,并就 4种主要病害的防治做了初步研究 ,最后对本区枣树病害的现状做了分析评估 .     

我国农作物病虫草鼠害成灾特点与对策分析

一、我国农作物病虫草鼠害的现状农作物病虫草鼠害是农业生产上的重要生物灾害，是制约高产、优质、高效益和持续发展的重要因素之一。据联合国粮农组织估计，世界粮食生产因虫害常年损失14％，因病害损失10％，因草害损失11％，因鼠害损失20％；棉花因虫害常年损失16％，因病害损失12％，因草害损失5．8％。我国农作物因病虫灾害的损失与这个估计类似。90年代以来，由于全球性气候反常，我国进入新一轮自然灾害频发期，以及耕作制度变更等原因，我国农作物病虫草鼠害的发生出现了较为明显的高峰期。在1989～1995年7年中，小麦赤霉病、小麦…     

几种路基病害的预防与治理

本文主要介绍了路基的常见几种的病害类型，分析了路基病害产生的原因提出了这几种病害的预治理和养护维修方法。     

籽粒苋病害调查与防治研究

通过1996 ～1998 年的系统调查与试验研究,查明江西籽粒苋病害19 种,其中真菌病害13种,细菌病害3 种,病毒病害2 种,线虫病害1 种;对以上病害的症状、病原物及发生情况进行了描述。根据籽粒苋病害发生态势,确定了主要防治对象并提出综合防治策略及措施。     

团头鲂累枝虫病的观察与防治研究

首次确诊该病是由累枝虫附生后引起细菌感染的累枝虫病；通过药物试验，得出甲醛防治团头纺累枝虫病的最低有效浓度为1．56×10－6，全池遍洒的安全浓度为25×10－6；设计出了一种网箱养鱼病害防治的施药新方法──PFUM法，从而使该病的治愈率达99％。     

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.     

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.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-