王轮铰接式月球机器人的全局路径规划

为了满足五轮铰接式月球机器人（FWALR）的避障及在月面上作业的要求，针对FWALR的结构特点、月球上凹凸不平的三维地形和机器人车轮与地面的相互作用，提出了基于虚拟传感器的双向全局路径规划方法和降维法。用此方法对FWALR进行了全局路径规划及仿真试验，证实了这种全局路径规划方法的可行性。     

基于神经网络的移动机器人路径规划算法的仿真

研究一种基于神经网络的移动机器人路径规划算法，充分利用神经网络的融合性和并行性提高移动机器人路径规划算法的运算速度．此算法也可以解决机器人的全局路径规划和局部路径规划问题．仿真结果表明这种算法可以快速可行地实现无碰撞优化路径规划，并且对动态环境具有较好的适应性．     

基于模糊神经网络和遗传算法的机器人三维路径规划

【目的】为了有效提高机器人三维路径规划精度。【方法】基于模糊神经网络和遗传算法建立了一种新的路径规划方法。【结果】根据路径长度和路径能量提出了三维路径规划的评价指标和优化函数, 同时利用模糊神经网络建立了三维路径的 5 层结构, 并结合遗传算法来优化并求解最优路径。【结论】通过仿真实验深入研究了影响该方法的关键因素, 结果表明该方法具有更好的适应性。
     

机器人无碰撞路径规划方法研究及实现

在分析现有路径规划和碰撞检测方法的基础上 ,提出了两种新的机器人路径规划方法 :中值检测算法和行进方向矢量优化法 .两种算法各有其特点 ,结合使用可取得更好的效果 ,通过基于三维图形的仿真实验证明了算法的有效性 .所开发的无碰撞路径规划及仿真软件已成功用于机器人无碰撞路径规划与仿真 .     

基于A~*算法的移动机器人路径规划

路径规划是移动机器人关键技术之一,也是实现移动机器人自主导航的前提,研究移动机器人利用栅格法创建环境地图时,在其计算资源有限的情况下,比较利用迷宫八方向搜索思想实现最短路径规划的Dijkstra算法,提出采用基于栅格划归地图的A*算法能更快实现移动机器人的无碰最短路径规划,编制了仿真程序,给出了仿真结果,可以满足移动机器人实时路径规划的需要。     

动态环境中基于遗传算法的移动机器人路径规划的仿真

动态环境中 ,移动机器人的动态路径规划是一个较难解决的课题 .提出了一种基于遗传算法的移动机器人的路径规划方法 .该方法采用实数编码和有明确物理意义的适应度函数 ,可以加快实时的运算速度和提高运算精度 .同时 ,该方法充分挖掘了可应用遗传算法解决移动机器人动态路径规划的潜力 .计算机仿真表明 ,仿真该控制方法具有良好的动态路径规划能力     

立交桥三维虚拟场景建模与指定路径的实时漫游

城市道路交通网络的日益复杂,使得现有的二维电子地图无法直观地反映道路之间的交错关系,因此基于二维电子地图的车辆导航系统在复杂的道路交叉口的路径引导就显得无能为力．基于这一现状,提出了利用三维视景仿真建模软件（MultiGen Creator）和三维实时仿真软件（MultiGen Vega）对立交桥进行三维虚拟场景建模与指定路径的实时漫游．论述了场景建模和场景漫游的关键技术,并在VC＋＋6．0的环境下将仿真结果生成脱离该软件环境的可执行文件,为现有的基于二维电子地图的车辆导航系统提供一个交互式的、高质量的、高逼真的虚拟场景．     

动态未知环境中的优化路径规划算法

提出一种在未知动态环境中进行启发式优化搜索的实时路径规划算法．该算法采用并行搜索策略，在机器人当前位置点到终点的连线方向上作角度增减两个方向的并行搜索．仿真试验证明该算法是实时而有效的．     

双臂SCARATES机器人实时无碰撞运动规划

以双臂SCARATES机器人为研究对象，基于可达流形和接触流形建立了双臂机器人C空间障碍物边界，并通过对障碍物边界的离散以及对路径搜索算法的选择，提出并仿真实现了双臂机器人实时无碰撞运动规划算法。     

切点法在路径规划中的应用

移动机器人研究中的一个重要领域是机器人路径规划方法，它分为环境信息完全已知的路径规划和环境信息完全未知或部分未知的路径规划，对于环境已知的路径规划，本文提出了基于切点的可视图法，并进行了相关的仿真试验。     

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-