摘要：In this paper,we consider a multi-UAV surveillance scenario where a team of unmanned aerial vehicles(UAVs)synchronously covers an area for monitoring the ground *** this scenario,we adopt the leader-follower control mode and propose a modified Lyapunov guidance vector field(LGVF)approach for improving the precision of surveillance trajectory ***,in order to adopt to poor communication conditions,we propose a prediction-based synchronization method for keeping the formation ***,in order to adapt the multi-UAV system to dynamic and uncertain environment,this paper proposes a hierarchical dynamic task scheduling *** this architecture,we firstly classify all the algorithms that perform tasks according to their functions,and then modularize the algorithms based on plugin ***,integrating the behavior model and plugin technique,this paper designs a three-layer control flow,which can efficiently achieve dynamic task *** order to verify the effectiveness of our architecture,we consider a multi-UAV traffic monitoring scenario and design several cases to demonstrate the online adjustment from three levels,respectively.

摘要：作家如何带领他的学生们——“入校之前大都没有写作小说的经历”——更深地进入小说的内部世界,在这一过程中,余华、学生(青年作家)、小说文本、小说作者、论文文本……所有这一切彼此之间如何互相凝视、呼应、质疑、碰撞、变异、融合,构成了一堂“写作课”的生机勃勃和意味深长,也显现了创意写作的教学过程中复杂的机制、多元的话语和隐秘的成长。本刊推出作家余华的这一特殊的“写作课”,目的正是着眼于通过一次教学和对话的“现场”,一次北京师范大学创意写作教学的切面,呈现当前中国方兴未艾、如火如荼的创意写作“跃进式”发展中,不断生长出的世界性与中国性、文学性与非文学性、进步性与局限性。

摘要：为了适应BPM发播系统升级改造,需要远场监测BPM授时信号的场强,因此有必要研究短波信道传输损耗,建立适当的计算模型。通过分析现有传输损耗理论模型,综合考虑地波、天波对BPM授时信号传输损耗的影响,在Labwindows/CVI开发环境下设计了BPM授时信号场强预测软件。通过将预测值与实测值比较,表明了该软件的可行性和准确性,可用于BPM授时信号场强的远场监测。

摘要：对鲁迅的《铸剑》与古代小说《列异传》、《搜神记》之间的联系进行比较,可看出《铸剑》的主题思想较古小说在深度与广度上的升华;而前后两者作品中的主人公的性格及思想境界也迥异。《铸剑》较之古小说中故事在创作方法、表现手段上均有推陈出新的艺术成就。

摘要：电影《肖申克的救赎》通过多层面的反讽策略,在对立的结构中对真相、崇高和救赎、自由等宏大叙事话语进行解构批判,而温情主义的结局又消解了艺术批判的深度,好莱坞的大众文化消费模式最终构成了艺术对现代社会与艺术自身的双重消解。

摘要：A three-dimensional diesel particulate filter(DPF)simulation model was developed by using AVL software FIRE to study the effects of four factors on soot particle distributions along the axial and radial directions in the DPF after the model accuracy was *** orthogonal test method was used to determine the importance and weights of the design of experiments(DoE)factors such as the expanding angle,the number of channels per square inch,and the exhaust mass flow *** effects of these factors on the uniformity of the soot particle distributions were also *** results show that when the soot loading time was 400 s,the soot particles inside the DPF along the axial direction exhibited a bowl shape,which was high on the both ends and low in the *** uniformity of the axial distribution of soot particles reduces significantly with an increase in the number of channels per square *** uniformity of the radial distribution reduced with an increase in the expanding angle of the divergent *** on the impacts on the axial uniformity,the three most influencing factors in a descending order are the number of channels per square inch,the exhaust mass flow rate,and the expanding angle of the divergent tube.

摘要：Recycling end-of-life tire rubber as asphalt modifier is known as a sustainable paving technology with merits including enhanced pavement durability,waste tire consumption and noise ***,the criticisms on the high construction emissions of asphalt rubber(AR)have limited its *** mix asphalt(WMA)effectively reduces the mixing and compaction temperatures of conventional hot mix asphalt *** combination of AR and WMA,called warm asphalt rubber(WAR),is a promising paving material which achieves pavement sustainability from principles to *** studies have demonstrated that WMA technologies work effectively with AR pavement in different ways,alleviating the concerns of potential higher emissions of AR by decreasing mixing and paving temperatures.A comprehensive literature review about WAR brings a better understanding of this promising paving *** findings of 165 publications were summarized in this *** summarized the recent developments of WAR in various aspects,including rheological properties,mix design,mixture mechanical performance,field application,construction emission,and asphalt-rubber-WMA additive *** is expected that this review is able to provide extensive information to explore further research development and application of WAR.

摘要：基于需求量、广告支出、成本和利润建立了一个新的广告经济模型,讨论了模型均衡解的稳定性,同时分析了广告经济系统受到外部扰动时的分岔演化行为。研究结果表明,外界扰动产生的系统混沌效应会使管理中各个环节的不确定性风险值增加,从而降低了各个环节的管理效率。因此,如何弱化外界扰动对经济系统的影响是经济、金融风险管理研究和应用中的重要工作。

摘要：乐烧技术是和普通陶瓷烧制非常不同的烧制方法。根据乐家官网介绍,乐家认同阿米夜来自福建,乐烧技术来自华南三彩。梳理了华南三彩、漳州素三彩、漳州五彩、吴须赤绘的关系及它们的烧制窑炉,认为日本乐烧所使用的内窑与釉上烤花用的“红炉”有更为密切的关系,其更直接的源头应该是漳州五彩。

摘要：红外焦平面成像技术是一种通过摄取景物热辐射分布,并将其转换为人眼可见图像的技术,广泛应用于侦察、制导、空间探测等方面.针对红外制导小体积、快速启动的应用要求,设计了快速启动红外焦平面成像制导系统.对应用于系统的折反式红外镜头、快速启动型红外焦平面探测器、低噪声成像电路等进行了设计,设计结果满足制导条件下的红外成像要求.