摘要：This paper describes the general optimization design method of Solar-Powered Unmanned Aerial Vehicle which priority considering propulsion system planning. Based on the traditional solar powered aircraft design method, the propulsion system top-level target parameters which affect the path planning are integrated into the general optimization design. According to the typical mission requirements of Solar-Powered Unmanned Aerial Vehicle, considering the design variables such as wing area, aspect ratio, design mission date and so on, the general optimization is carried out with the minimum aircraft weight as the optimization objective. The influence of wing area and aspect ratio on the optimal design results is analyzed and compared with the traditional design method. The results show that the general design method of Solar-Powered Unmanned Aerial Vehicle for priority considering propulsion system can greatly reduce the electricity demand of energy storage battery, greatly reduce the aircraft weight of Solar-Powered Unmanned Aerial Vehicle.

摘要：归纳提炼了大学物理实验智慧教学的4个关键要素——教学管理、教学设计、教学资源、评价体系,探究并设计了M DRE教学实践模式.结合理论与实证研究,深入分析了物理实验智慧教学中的教育管理模式,构建了多方位优化视角的智慧型学习资源平台,以及量化与质化相结合的综合教学教研评价机制,一定程度上深化拓展了实验教学的设计理念和方法,为推动未来教育的高品质和可持续发展提供了有价值的参考和借鉴.

摘要：With the continuous escalation of modern war,soldiers need to transport more combat materials to the combat *** limited load-bearing capacity of soldiers seriously restricts their carrying capacity and *** is urgent to develop a power-assisted exoskeleton robot suitable for individual *** the past,most power-assisted exoskeleton robots were driven by *** driving method has an excellent power-assisted effect,but the endurance is often *** view of this shortcoming,this study designed an ankle exoskeleton robot based on an active-passive combined drive through simulation analysis of human *** used OpenSim software to simulate and verify that the addition of spring could achieve a good *** the same time,according to the gait characteristics of the human body,the gait planning of an exoskeleton robot was carried ***,theoretical analysis explained that the cooperation among spring,motor and wearer could be realized in this ***,the assisting ability and driving coordination of the active-passive combination driven ankle exoskeleton robot were verified through experiments.

摘要：以具备不同动力学参数电动汽车组成的异质车队作为研究对象,以满足混合异质车流的跟车性、安全性与舒适性等性能为目标,提出了一种利用模糊控制理论改变原本MPC固定权重的协同式自适应巡航控制系统(CACC)。通过构建协同式自适应巡航控制系统的车辆间纵向动力学模型,搭建离散状态空间等式,创建相应的目标优化函数并进行约束求解,设计模糊规则改变MPC相关性能的固定权重系数,最后通过构造Simulink和CarSim的联合仿真模型进行测试。试验结果表明,在跟随行驶工况下,改进后的模糊MPC控制算法比传统的MPC控制效果更明显,能更好响应异质车队跟车性、安全性与舒适性等性能,更满足实际车流行驶情况。

摘要：为实现液氢储罐中真空多层绝热结构更优异的绝热性能,在以往三密度区或四密度区的基础上,提出了一种绝热结构逐层连续变密度优化方法,对其辐射屏层间距布置进行优化。确定了耦合蒸气冷却屏(VCS)和VCS内引入仲正转化后的最优层间距布置,分析了连续变密度优化对温度和热流密度分布的影响,并与采用分段变密度方法的结果进行了对比。结果表明:在绝热结构总厚度一定的情况下,优化后冷边界附近的屏间距显著增加,从而降低了冷边界附近的固体导热和热边界附近的辐射换热。对于仅耦合VCS的绝热结构,当VCS设置在第3层辐射屏时,优化效果最显著,最小热流密度从0.2492 W·m^(-2)降至0.2088 W·m^(-2),降幅达16.2%;优化后VCS最佳安装位置从第18层调整至第14层,相对位置从0.51移至0.56。当VCS内引入仲正转化时,VCS在第2层辐射屏时优化效果最为显著,热流密度较优化前降低了22.0%。研究了连续变密度优化方法对绝热性能的影响规律,为多层绝热结构的变密度优化设计提供支撑。

摘要：Proteins are one of the major classes of biomolecules that execute biological functions for maintenance of *** kinds of nanostructures self-assembled from proteins have been created in nature over millions of years of evolution,including protein nanowires,layers and *** protein nanostructures can be reconstructed and equipped with desired new *** from and manipulating the self-assembly of protein nanostructures not only help to deepen our understanding of the nature of life but also offer new routes to fabricate novel nanomaterials for diverse *** review summarizes the recent research progress in this field,focusing on the characteristics,functionalization strategies,and applications of protein nanostructures.

摘要：为了解决传统火灾检测系统在森林、复杂的山区地形等场景下可能会出现误报或漏报的问题,文中设计了一种用于火灾检测的X波段辐射计系统,其主要包括两部分,分别是前端高定向阵列天线以及直检型辐射计通道。阵列天线经实测,增益达到21.44 dB,3 dB波束宽度小于15°,辐射计通道包括低噪声放大器模块、带通滤波器模块和对数检波模块,该通道具有体积小、高集成度、低功耗等特点。实验结果表明,系统能够探测不同环境下温度的辐射能量,并最终以电压的方式呈现。

摘要：As a unique artistic form of both young and old, urban sculpture art plays a finishing touch to the urban image of the new era, gradually becoming the point to enhance the overall image of modem city. For public art sculpture gradually integrates into modem life, the attention of it is also increasing. A city needs good sculpture to heighten the atmosphere and shows cultural deposits, in the meantime, excellent urban sculpture will also greatly enhance the influence of cultural landscape and public art, effectively creating urban culture brand image and enhancing the city＇ s comprehensive charm.

摘要：了解“新课标”颁布后初中物理教师的课程实施水平、类型、特征与影响,对于调控教师课程实施有效性,推动“新课标”落地具有重要意义。研究采用混合研究中的解释性序列设计,对课改实验区初中物理教师课程实施实然样态与影响因素进行调查,发现:(1)教师整体课程实施水平较高,个人教学“观念-能力”是影响教师实施的关键因素;(2)教师群体可以划分为“低-实施低效型、中-顺势扮演型、高-实施高效型、高-迎难而上型”四类实施类型,不同类型教师的课程实施各维度呈现多重异质性,在性别与教龄之间的分布呈现峰谷交叠态势,在灵活选用多种教学方式方面呈现显著差异;(3)不同类型教师课程实施主观影响因素各具特点,分别呈现“注重学校课改环境、强调课程资源支持、提升实施自我效能、多元主体协同合作”四大特征。为推进“新课标”的有效落地,建议根据初中物理教师课程实施类型进行分类施策。

摘要：In modem society, advertising plays a very important role in people＇s daily life. We can not imagine the world without advertisements. Advertisers try every means to design persuasive advertisements for their products by attractive patterns, photos and colors, as well as commonly shared resources of language. The use of presupposition in advertising language, which is an important topic in pragmaties, can serve the function fairly well. This paper first presents a general review of previous studies on presupposition phenomena in advertising language, then investigates the use of presuppositions in advertising language by both qualitative and quantitative analyses. By qualitative analysis, the author tries to explore the functions of each type of presuppositions in advertising texts; by quantitative analysis, 100 sentences selected from various advertisements for different products are examined.