一个基于人工势场的战场态势分析模型

在基于Agent建模仿真方法的战争复杂性研究过程中,为了解决高层指挥控制Agent对军事态势自主分析判断能力的问题,引入了高等物理学中电势场的基本原理来对战场态势分析进行建模——并取名为人工势场。文中介绍了人工势场模型构建的基本原理,结合工程实践详细讨论了该模型在理论和工程实现上的一些基本问题,最后给出了基于该模型的几个简单的分析测试实例。仿真实验证明该模型用于高层指挥控制Agent的实时军事态势分析是可行的。     

纺织钢令碳氮共渗处理的控制技术

为提高纺织钢令的耐磨性,对其表面进行碳氮共渗处理.通过分析气氛中不同碳势模式控制的特点,确定了20钢碳氮共渗的工艺参数.根据碳氮质量分数、残余奥氏体质量分数,以及合金元素内氧化对纺织钢令显微硬度的影响,设计了碳势控制系统.系统运行后取得了满意的控制效果.     

球对称分子SF_6、CH_4相互作用势的理论研究

利用Tang-Toennies势模型(以下简称TT势),计算了SF6-SF6、CH4-CH4球对称分子之间的相互作用势,得出的结果与Morse-Morse-Spline-van der Waals(以下简称MMSV)势得出的结果进行了比较。比较发现TT势相对于其它势模型而言是一种简单、可靠的势模型。     

成都市城镇集聚效益及都市圈分工模型研究

近几年成都市城市化水平不断的提高，城镇聚集效益明显，同时成都市也面临着城乡由“二元”走向“一体”的历史机遇．通过区域人口、生产集中度的不一致性系数的计算，指出成都市城市发展存在的问题，并采用城市集聚效益指数、城市发展潜力指数两个指标来反映成都市区域中心城市经济发展现状，分析大成都都市圈模型，并提出了相关对策．     

用于未知环境的移动传感器网络自部署算法

针对具有可控机动能力的无线传感器网络的自部署问题，提出了一种用于未知环境的移动传感器网络自部署算法．该算法结合人工势场法与确定度网格方法，用确定度来对障碍物进行抽象的表达，通过活动窗口单元的虚拟排斥力来迫使网络扩展、仿真实验结果表明，该算法可以有效地用于移动传感器网络的自部署，网络覆盖面积在部署完成时会有显著的增长．     

带斯塔克势的非线性Schrdinger方程L~2集中性质

讨论了带斯塔克势的非线性Schrd inger方程爆破解的定性性质,运用一个变量替换建立了带斯塔克势的非线性Schrd inger方程与不带势的经典非线性Schrd inger方程之间的联系.结合经典非线性Schrd inger方程的性质,进一步研究了临界的带斯塔克势的非线性Schrd inger方程爆破解的结构,证明了其爆破解具有L2集中性质.特别地,当初始值条件径向对称时,证明了原点O为集中点.     

The role of different cues in the brain mechanism on visual spatial attention

The visual spatial attention mechanism in the brain was studied in 16 young subjects through the visual search paradigm of precue-target by the event-related potential (ERP) technique, with the attentive ranges cued by different scales of Chinese character and region cues. The results showed that the response time for Chinese character cues was much longer than that for region cues especially for small region cues. With the exterior interferences, the target stimuli recognition under region cues was much quicker than that under Chinese character cues. Compared with that under region cues, targets under Chinese character cues could lead to increase of the posterior P1, decrease of the N1 and increase of the P2. It should also be noted that the differences between region cues and Chinese character cues were affected by the interference types. Under exterior interferences, no significant difference was found between region cues and Chinese character cues; however, it was not the case under the interior interferences. Considering the difference between the exterior interferences and the interior interferences, we could conclude that with the increase of difficulty in target recognition there was obvious difference in the consumption of anterior frontal resources by target stimuli under the two kinds of cues.     

热脉冲对铜晶态非晶态转变的影响

采用分子动力学和EAM(embedded atom method)势,模拟研究了热脉冲对金属铜从晶态到非晶态转变的影响.计算结果表明,热脉冲作用下,转变时体系平均温度高于平衡计算熔点,结构转变是过热熔化过程,系统不可能发生从晶态到非晶态非平衡转变.随着热脉冲频率的增大,转变所需热脉冲幅度减小,体系转变过热度降低.     

盐酸溶液中乌鲁托品对钢的缓蚀性能

用电化学阻抗谱(EIS)和开路电位测量法(OCPM)研究了在1 mol·L-1盐酸溶液中乌鲁托品(UP)与45#钢的界面吸附及缓蚀行为.EIS表明:随着缓蚀剂UP浓度的增大,吸附膜逐渐形成,电荷传递电阻增大.在缓蚀剂浓度为0.01 mol·L-1时,缓蚀效率出现最大值;大于该浓度时,缓蚀效率下降.OCPM表明:加缓蚀剂UP前后体系自腐蚀电位的改变与温度的倒数呈线性关系.UP对阳极过程有抑制作用,是阳极型缓蚀剂;吸附热为-35 kJ/mol,吸附形式为物理吸附.     

Analysis on water potential of Populus euphratica oliv and its meaning in the lower reaches of Tarim River,Xinjiang

Combined with materials measured on leaves water potential of Populus euphratica oliv in the process of ecological water delivery in the lower reaches of Tarim River, the influence of ground-water depths and soil salinity on leaves water potential of P. euphratica was analyzed. We found that there was evident negative correlation between the leaves water potential of P. euphratica and ground-water depths. The deeper the ground-water depths were, the lower the leaves water potential of P. euphratica was, the more serious drought stress P. euphratica suffered from. Besides, there was evident negative correlation between the soil salinity and the leaves water potential of P. euphratica. The bigger the soil salinity was, the lower the leaves water potential of P euphratica was, the more serious drought stress was indicated from which P. euphratica suffered. For sections rather distant for Daxihaizi Reservoir as well as for those places of wells rather distant from the river course, ground-water depths and the soil salinity were high; the leaves water potential of P. euphratica was low. The leaves water potential of P. euphratica can reflect the degree at which P. euphratica suffers from drought and salt stress, and has an important reference meaning in analyzing proper ground-water depths for the survival and growth of P. euphratic in the lower reaches of Tarim River.