联合防空作战初探

随着强敌空袭理论的深入研究和发展,近几场局部战争表明,强敌越来越看重对要地和首都等的空袭,而联合防空作战正是基于强敌空袭作战理论的发展而产生的新型防空理论。     

多通道防空导弹武器系统作战效能分析的排队模型研究

根据现代防空导弹武器系统面临的作战环境和空袭模式,结合防空导弹武器系统的射击原理,建立了防空导弹武器系统效能分析的排队模型,并对所建模型的统计平衡特性进行了论证研究。     

空袭兵器战术攻击方向判断模型

着眼于防空作战决策需求,分析了空袭兵器战术攻击方向的影响因素,给出了量化规则,并利用综合评判方法建立了空袭兵器战术攻击方向判断模型,为防空部署决策提供了一种定量分析手段。     

野战防空预警系统应用模块设计与实现

现代战争中,陆军在进行地面作战的全过程都面临着严重的空中威胁,有效的防空作战已成为陆军顺利完成作战任务的根本前提。将GIS技术应用于防空预警系统中,可以为指挥员提供战场环境中所需的地理属性信息,以及强大的空间分析功能。本文针对野战防空的特点和部队作战、训练需要,提出系统设计的功能结构,重点介绍了空情动态的实时预警,防空阵地的配置和对空袭目标的火力分配和军事地形分析。     

防空一体化——要地防空的新生命

本文以近几场局部战争为基础,通过分析美国空袭作战理论,阐述了一体化防空条件下要地防空在现代防空中的重要地位。     

歼击机防空作战最优出动架数算法初探

为解决未来空战中航空兵反空袭防空作战的实际需要,具体分析了航空兵防空作战的两种情况,运用运筹学的方法,构建了较为合理的数学模型,并对模型进行了数值计算及求解验证,为未来歼击机反空袭防空作战最优出动架数提供一个较为科学、合理的参考依据.     

信息化条件下防空兵作战体系初探

现代空袭为减少战损,圆满达成战役目的,都非常重视和强调对敌前沿、纵深内防空体系及其组成部分实施先期毁灭性、震撼性电子压制和火力打击,一举摧毁对方抗击和反击的能力及信念。随着信息化条件下空袭兵器综合火力打击规模、程度的扩大和能力的不断增强及＂空地一体＂作战理论的日趋成熟,加强研究,并采取一系列有效措施,研究信息化条件下防空兵作战体系是现代防空作战对防空兵的迫切要求。     

印军空袭作战现状和发展趋势分析

印军对空袭作战越来越重视,空袭作战的武器装备性能不断的提高,作战理论也不断的创新。通过分析印军空袭作战的优势、不足和发展趋势,对了解印军空袭作战现状,掌握其发展方向具有现实意义,同时对我进行防空作战建设也有借鉴意义。     

基于动态聚类分析的空袭编队判断模型

空袭编队是由担负不同作战任务的飞机组成的战术机群,其分布是防空作战指挥员分析空袭企图和定下作战决心的重要依据。空袭编队具有数量多、分布范围大,空情分析要求实时性强的特点,依据空中目标的数据特征,首先建立了基于动态聚类法对空中目标群进行分类的方法和步骤,该算法具有较好地收敛性,能够满足防空指控系统的高实时性要求。在此基础上提出了目标群内和目标群间作战参数的计算方法,并依据空袭编队数量分布及航路捷径给出了主要来袭方向和攻击企图分析模型。最后给出了一个具体算例,其运行结果与指挥员的判断基本吻合。工程实际应用表明,该模型能对空中目标进行快速聚类,可为区域防空指挥员准确掌握空情和快速决策提供量化依据。     

信息化条件下陆军野战防空能力建设问题探析

信息化条件下,野战防空作战呈现出许多新特点,加之我野战防空力量建设还存在许多问题,使得野战防空力量与信息化条件下反空袭作战需求之间的差距进一步拉大。从信息化条件下陆军野战防空的任务,空袭特点,以及面临的问题出发,对加强野战防空力量建设进行了一些探索。     

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-