基于Fast Marching方法的多机器人追捕算法

多机器人系统的追捕-逃跑问题是人工智能领域一个非常重要的问题.本文为实现多追捕者协作追捕逃跑目标,提出了一种基于Fast Marching方法的多机器人协作追捕策略.追捕过程中,追捕者数量多于逃跑者的情况下,协助追捕者通过构造“活跃区域”与主追捕者的合作,实现一种压迫式的追捕策略.     

RoboCup中型组比赛中动态阵型选择

针对机器人足球世界杯RoboCup中型组比赛提出的动态阵型选择算法．建立了动态协作模型,将多个智能体组合成一个拥有共同目标的团队。完成给定的任务分配和站位配合,实现了基于动态阵型变换的多智能体动态协作．通过实现各种阵型之间的动态变换．满足了不同情况的协作要求．显著提高了球队的整体竞赛能力．     

基于活跃区域的多机器人分层追逃算法

提出一种基于活跃区域的多机器人分层追逃算法,根据追捕时间及效率将多个追捕者和逃跑者分派到多个单一的双人追逃方案中,在追捕者多于逃跑者的情况下形成协作追捕者.协作追捕者观察需要其追捕的追逃者当前的运动曲线方程,利用快速推进法计算逃跑者未来的活跃区域,并根据该活跃区域执行压迫式追捕.通过对追捕者和逃跑者采用不同的策略进行仿...     

自利Agent追捕联盟生成算法

多Agent合作追捕是多Agent系统研究的经典问题,在机器人等领域具有重要的应用前景。文章提出了面向任务的自利Agent联盟生成算法,该算法能同时处理多个不同类型的逃跑Agent的任务分配问题;因为追捕Agent和逃跑Agent速度相等,追捕联盟成员位置的分布十分关键,所以提出了基于贡献度的联盟成员选择策略;同时为了较好地体现追捕Agent的自利性,定义了需求度作为自利性的度量,解决了冲突协商且有利于资源的优化配置。通过与经典拍卖算法的比较表明,该算法显著提高了追捕成功率。     

多机器人追捕-逃跑问题对策模型的研究

在机器人的研究领域里,多机器人的协调与合作成为了一个非常重要的课题。在这其中,分布式多机器人系统中的机器人之间相互协调与合作的典型问题就是追捕-逃跑问题。基于对策论的原理,针对多机器人的追捕-逃跑问题展开了研究,并将追捕-逃跑问题按空间、时间离散化后转为一个对策模型。     

基于主智能体的群体学习算法GLBMA

以机器人足球比赛（RoboCup）为背景,基于主智能体和辅助智能体概念,提出了基于主智能体群体强化学习算法（GLBMA）,该算法通过主智能体和辅智能体的角色切换来实现整个团队的学习,改进了传统的群体强化学习算法。RoboCup仿真比赛试验表明,传统群体强化学习算法中的行为学习状态空间过大,连续状态空间的行为选择及多智能体合作求解等问题得到了解决．     

一种基于改进动态联盟算法的多机器人协作捕猎方法

多机器人协作捕猎,不仅需要解决目标搜索、追赶和避障等基本问题,还需要设计最优任务分配机制,构建高效追捕联盟,以便快速地捕获猎物。综合考虑机器人和目标之间的各种相关属性,定义量化标准,构造辅助决策矩阵,建立动态联盟。然后将基于生物刺激神经网络的追赶策略用于联盟形成后的追捕过程中。仿真实验表明该算法具有较高的围捕效率。     

一种多帆器人协作围捕策略的研究

在二维受限环境中,研究多机器人对移动目标的协作围捕问题,结合追捕者与逃逸者的相对位姿,对多机器人围捕的初始状态条件进行划分,针对多机器人群体规模、速度、成功围捕条件进行讨论,并对目标机器人的逃逸策略和围捕机器人的围捕策略进行协调性动态调整,提出了采用夹角最大原则的逃逸策略,确定了迎面对角阻截与虚拟势点相结合的围捕策略。课题对分别将新提出的逃逸策略和围捕策略与原有逃逸策略和围捕策略相比较进行仿真实验,结果表明所提出的动态调整策略的有效性。     

基于改进分配法的多智能体队形形成

多机器人是当今研究热点,机器人编队是多机器人的一个重要问题,编队行为在自然界中广泛存在,大雁、鱼群的有秩序的聚集并编队运动启示编队运动具有重要的意义和作用。文章针对多机器人队形问题,提出了一个基于多智能体(multi-agent)结构的优化算法,多智能体的体系结构具有良好的自适应特点,适合运用到多机器人控制中,对于队形形成问题,改进分配算法具有良好的特性。     

基于强化学习的多机器人合作行为获取

研究了基于强化学习的多机器人学习社会合作行为的问题。通过定义的分配布尔矩阵,对参与任务者进行奖励回报,并综合基础行为,生成状态到行为的新的映射,形成高级的群体合作行为,使得团队作为一个整体受益。讨论了学习社会行为的可行性和必要性,并采用强化学习方法,给出了多机器人传接合作搬运的详细算法实现。     

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.     

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.     

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.     

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.     

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.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.