基于粒子群优化算法的协同空战导弹目标分配

为了取得协同空战的最佳攻击效果,在协同攻击的过程中进行导弹-目标最优分配是一种有效的解决方法。首先运用作战效能和运筹学理论建立多目标协同攻击的导弹-目标最优分配模型,其次在分析基本粒子群优化算法特点的基础之上提出了一种改进粒子群优化算法,其中的主要改进有3点:惯性权自适应调整、粒子速度与位置自动更新以及优化策略改进。然后将该改进粒子群优化算法应用于协同空战导弹-目标最优分配问题的迭代求解。仿真结果表明所采取的改进策略加快了算法的收敛速度,提高了粒子的局部求解精度与全局寻优能力,并且与基本粒子群算法、遗传算法相比较,该改进粒子群优化算法能够更加快速、有效地求出多目标协同攻击的导弹-目标分配最优解。     

基于自适应混合粒子群算法的协同多目标攻击空战决策

针对协同多目标攻击过程中的空战决策问题,建立了协同多目标攻击空战决策的多目标优化数学模型,提出了一种新的自适应混合粒子群优化算法,并将其应用于协同多目标攻击空战决策问题.该算法利用种群多样性信息对惯性权重进行非线性调整,并结合遗传算法的思想,提出了对粒子进行交叉和变异操作来完成粒子更新的方法.仿真结果表明,该算法具有较高的局部求解精度和全局搜索能力,是一种求解协同多目标攻击空战决策问题的有效算法.     

烧结过程控制专家系统(Ⅲ)——透气性中心控制策略和烧结终点预报策略

为了克服烧结过程因机理复杂、影响因素多且相关性高而难以准确控制的困难,提出了烧结过程状态控制以透气性为中心的控制策略,研究了透气性的判断方法和实现此策略的控制原则和方法;同时,为了解决烧结过程控制的长时滞问题,提出了烧结终点的预报策略,研究了烧结终点的预报方法．     

基于改进CMOPSO挠性卫星姿态机动路径优化

针对挠性卫星姿态快速机动快速稳定控制中的路径优化问题,研究了一种基于云多目标粒子群算法(CMOPSO)的姿态机动路径优化方法.为了解决云多目标粒子群算法寻优初期可能出现粒子陷入局部最优的问题,提出了一种随迭代次数呈反正切函数变化调整惯性权重的改进云多目标粒子群算法.针对挠性卫星大角度姿态机动问题,考虑挠性卫星姿态机动过程中角加速度和角速度的限制,建立了姿态机动路径参数的多目标优化模型,并采用改进的CMOPSO进行优化.仿真结果验证了所提改进的云多目标粒子群算法在挠性卫星姿态快速机动快速稳定控制中的有效性.     

一种求解属性约简优化的协同粒子群算法

针对粗糙属性约简优化问题,利用粒子群寻求最优解的优势,提出一种改进的粗糙集属性约简优化的协同粒子群算法(AR-CPSO)。在最优属性寻求过程中,该算法使粒子群在属性空间通过约简集向量的分解和邻域簇的协同学习提高其寻优能力,并利用自适应约束强化罚函数较好地收敛到最优目标属性约简集。该算法能始终保持种群的多样性、协作性,并避免过早地陷入局部最优。相关仿真实验表明,AR-CPSO算法能有效地找到全局最优属性约简集,具有较强的属性协同约简优化性能。     

基于粒子群算法的大跨度钢结构吊点层次优化

在面对大跨度钢结构的多台起重机协同吊装时,为了解决各种变形协调方程都不明确情况下的结构吊点设计问题,利用最小应变能原理,基于改进粒子群算法对吊点进行层次优化,即对吊点数量和布局进行综合优化.通过对标准粒子群算法进行改进并结合APDL的ANSYS二次开发技术,在MATLAB环境中编制了适应大跨度钢结构多吊点层次优化的程序,有限元软件ANSYS被后台调用求解目标函数.该方法充分发挥了有限元软件数值计算准确及粒子群算法求极值的高效性和全局性的优点,与ANSYS自带的零阶方法以及遗传算法、模拟退火算法等进化算法相比表明,本优化方法取得了较好的结果,为解决大跨度结构的吊点离散变量组合优化问题提供了一种新的更有效的途径.     

基于改进多目标粒子群优化算法的发酵过程补料优化控制

提出了一种基于改进多目标粒子群优化算法(MOPSO)的发酵过程补料优化控制方法,并将该方法用于工业酵母发酵过程补料速率的优化控制。改进的MOPSO算法利用约束违反程度信息修正种群的学习进化公式,减缓了部分粒子在约束边界附近的飞行速度,提高了算法的全局搜索能力。仿真实验结果表明,改进的MOPSO算法能够获得最优的补料轨迹,有效地实现了工业酵母发酵过程补料速率的多目标优化控制。     

基于改进的多目标量子行为粒子群优化算法的多无人机协同任务分配

为在给定的时间内以最小代价和最大效益完成任务,建立了多无人机协同任务分配问题的多目标优化模型.采用改进的多目标量子行为粒子群优化算法求解最优任务分配方案,定义了一种从所求候选方案中选取最优分配方案的自主选择准则.对比分析多目标粒子群优化、多目标进化算法和该文算法所求的最优分配方案.仿真结果表明该文算法能够较快地求解问题,而且所求最优任务分配方案的性能优于其它三种算法.     

基于改进多目标粒子群优化算法的发酵过程补料优化控制

提出了一种基于改进多目标粒子群优化算法(MOPSO)的发酵过程补料优化控制方法,并将该方法用于工业酵母发酵过程补料速率的优化控制。改进的MOPSO算法利用约束违反程度信息修正种群的学习进化公式,减缓了部分粒子在约束边界附近的飞行速度,提高了算法的全局搜索能力。仿真实验结果表明,改进的MOPSO算法能够获得最优的补料轨迹,有效地实现了工业酵母发酵过程补料速率的多目标优化控制     

面向无人机路径规划的多目标粒子群优化算法

针对无人机路径规划中方案单一的问题,本文提出一种基于集分解的多目标综合学习粒子群优化算法框架(MOCS-PSO/D),该算法使用基于分解的多目标优化框架(MOEA/D),结合基于集的粒子群优化(S-PSO)和综合学习粒子群优化(CLPSO),对CLPSO和PSO的速度更新公式进行改进,直接获得更多样的路径规划方案,同时...     

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-