摘要：A biomimetic underwater vehicle propelled by two undulating long-fins is introduced in this paper. The concerned vehicle is propelled by two symmetrical undulating long-fins installed on both sides. Ten servo motors are employed to drive the long-fins and cosine wave function is employed for motor control. A real-time control system is designed for controlling the long-fins by adjusting its oscillating frequency and oscillating amplitude. An inertial measurement unit is installed to collect the accelerations and angular velocity. To obtain the relationship between oscillating frequency/amplitude and swimming performance, kinematic analysis and hydromechanic analysis are given. By dividing the long-fin into many small elements and computing the hydrodynamic force acting on each element, the instantaneous thrust generated by the long-fin is obtained. Then the average thrust of the long-fin is obtained by summing up the forces acted on the elements in one undulating period. Then swimming experiments are carried out to validate the vehicle design and kinematic analysis and hydromechanic analysis. And two swimming motion modes including marching and rotating locomotion are chosen. Finally, discussions between the swimming performance and the oscillating parameters are given.

摘要：宁国翠竹公园是由张浪教授设计团队于2003年设计完成,位于安徽省宣城市宁国市西津河畔,占地约8.67 hm2,历经十几年的风雨,至今依旧尽显其特殊的魅力,依然令人们心驰神往。本文基于风景园林有机生成设计理论研究,根据原场地所属的"本底资源"和"地域人文"来构建植物配置有机的"空间形态"和"空间风格",对宁国翠竹公园有机生成的过程进行逻辑演绎与科学解释。在此理论指导下,本文以"琴乐"与"竹林"的场地特征与名人文化这两种元素相结合,视场地为琴身,视设计为拨动的琴弦,使得最终有机生成的设计谱写为洋洋盈耳的竹林乐章。

摘要：在机场自治化运行条件下，对于场面运行环境的感知是制约机场实现自治化运行的一个关键因素，而机场场面交通运行过程中对于场面滑行资源占用情况是构建完整的场面运行环境的关键步骤，首先以机场场面滑行过程为研究对象，构建了机场场面滑行过程的本体模型，基于机场的场面路网结构，对路网中的滑行路径进行划分，建立了以路网节点与节点连接关系为基础的“节点-边”模型，同时以本体模型为基础，定义了场面路网的动静态属性作为路网节点的基本属性，在此基础上，以路网节点为研究对象，将航空器场面滑行过程中的存在的多种冲突场景以路网节点的动态属性进行模型表达，从而实现了航空器滑行过程在路网节点上的动态表示。以航空器动力学模型生成的速度数据为基础，设计了在航空器冲突场景下的飞行区场面滑行资源动态图的可视化表示，试验结果表明，该模型可以很好地表示场面运行过程，可以增强场面交通参与者对飞行区场面滑行资源占用状况的全域感知能力。

摘要：目的:探索基于自我决定理论,从专业、同伴、家庭三个维度提供自主性支持是否能提升糖尿病患者的自我管理行为及血糖控制水平,并分析干预效果的影响因素。方法:采用方便抽样方法,在北京市城区选择6个社区,各社区分别选择条件相似的服务站作为不同干预组别,该站管理的符合纳入标准的糖尿病患者即招募进该组。以社区站为单位分为3组,常规干预组仅发放知识手册并按基本公共卫生服务要求开展健康管理;同伴支持组按社区分为小组,开展医生主导的小组活动;自主性支持组在同伴支持活动的基础上,基于自我决定理论,设计活动材料及流程,并对医生、同伴进行自主性支持的培训,同时以手册形式培训家人,形成三者协同的自主性支持。干预期为3个月,主要评价指标为糖化血红蛋白(Hb A1c)及患者自我管理行为、技能、知识、自我效能评分。结果:干预前后,常规干预组的Hb A1c分别为7.40%±1.37%、7.30%±1.18%;同伴支持组的Hb A1c分别为7.33%±1.15%、7.13%±1.27%;自主性支持组的Hb A1c分别为7.42%±1.22%、6.78%±0.80%。干预前后,常规干预组自我管理行为得分分别为10.54±2.28、10.80±2.15,同伴支持组的得分分别为11.09±1.89、11.40±1.78,自主性支持组的得分分别为10.34±1.99、11.10±1.65。自主性支持组的Hb A1c均值降低的绝对值高于其余两组,干预后达标率高于其余两组,自我管理行为提升高于其余两组。多因素分析结果显示,干预后Hb A1c值与基线Hb A1c呈正相关,与干预后自我管理行为得分呈负相关,自主性支持组的Hb A1c低于常规干预组,干预后自我管理行为与基线行为得分、干预后自我效能、知识、技能、家庭支持、自主性支持、同伴支持、年龄均呈正相关。结论:基于自我决定理论开展糖尿病自我管理行为干预可以有效促进患者自我管理行为及血糖控制,效果优于单一同伴支持活动。

摘要：Summary of main observation and conclusion To combat multidrug-resistant Gram-positive bacteria,new antimicrobials particularly those with novel mechanism of action are badly *** with conventional antibiotics which are typical inhibitors,small-molecule activators of bacterial CIpP represent a new class of *** ClpP activator has been developed for clinical ***,we conducted a screening on our library of benga-mide-like ring opened analogues and found that L472-2 possesses a low minimum inhibitory concentration(MIC)against *** and shows no activity for ClpP activation in vitro,but it displayed reduced antibacterial activity against *** with clpP *** order to obtain bengamide analogues that activate ClpP in vitro as well as possess antibacterial activity,we perform further structural modifications starting from *** 37 re-mains the antimicrobial activity and activation of ClpP protein in vitro,which could be viewed as a new chemical scaffold for ClpP activators and worthy of further investigation.

摘要：为提高红木余料的利用率,传承和发扬中国传统文化和广西少数民族特色文化,结合当代流行的消费观念,提出了一种将红木加工余料与文化相融合的设计方案,即将红木余料做成外观为爱心形状,且可磁吸的吊坠,并将十二生肖与广西少数民族特色纹样相结合后进行简化抽象,设计生成装饰图案。研究结果可为提高红木加工余料的附加值、充分发挥传统与民族文化魅力提供新思路,进而推动红木资源的高效利用和优秀文化的传承。

摘要：Three kinds of thermochromic materials(DC8,DC12,DC16)were synthesized by linking the rigid 1,4-bis[2-(4-pyridyl)ethenyl]-benzene(bpeb)with different lengths of alkyl *** exhibit remarkable fluorescent color changes under the irradiation of 365 nm light with elevating temperature,which is supposed to be caused by the transition between the crystal state and the amorphous ***,the DC16 solid also has a photochromic *** should be noticed that the phase transition temperatures of three materials measured by differential scanning calorimetry are higher than those of the fluorescence color changes during the heating ***,the allochroic effect is attributed to the synergistic effect of both heating and photo-inducement(365 nm).Ethanol can turn the heated powder into the initial crystal again which indicates that their thermochromic behavior is reversible and makes the fluorescence recover.

摘要：嘉德艺术中心是同时带有大悬臂和大跨转换层的复杂结构,为保证该结构的抗震安全性,进行了1:16的缩比振动台试验,并利用ABAQUS进行了弹塑性分析。研究了结构的动力特性,研究了结构在8度多遇、设防、罕遇地震及9度罕遇地震下的加速度响应、位移响应及损伤过程。并讨论了大悬臂桁架和大跨转换层桁架竖向地震作用计算方法。研究结果表明:该结构具有良好的变形能力和延性,具有足够的抗震储备能力,满足规范"小震不坏,中震可修,大震不倒"的设防要求;采用竖向振型分解反应谱法计算的竖向地震作用并不一定大于规范简化方法的结果,实际设计中宜取两者的包络;且对于8度抗震设防的大悬臂桁架和大跨转换层桁架,规范简化方法计算的竖向地震作用偏小,宜取重力荷载代表值的15%计算竖向地震作用。

摘要：针对现有无线传感器网络节点的不足和机械振动信号采集的需求,设计一种可实现机械振动信号采集和片上处理的无线传感器网络节点。该节点采用MEMS加速度传感器拾取振动信号,以低功耗FPGA芯片为控制核心,采用可编程片上系统技术,将数据采集、存储、处理和传输等控制功能模块集成到单个FPGA芯片中。本文着重介绍了节点数据采集、存储和传输部分的硬件电路和控制逻辑设计,对比实验表明该节点能有效采集和监测机械振动信号。

摘要：Hamamatsu R1924A is one of the most widely used photomultiplier tubes(PMTs) in nuclear *** the active base suitable for R1924A is still not available in market, an active base is designed for Hamamatsu R1924A PMT, and the test results at high counting rates are presented. The active bases with two different sets of resistor chains were tested and compared by a frequency-controlled green straw hat LED light. A stable signal output up to 100 kHz is achieved using frequency-controlled LED pulsed light. The temperature of bases, which reflects the power consumption and is crucial for applications in vacuum, is also monitored with the same LED pulsed light. The temperature of the active base with smaller resistances reaches about twice of that of the active base with larger resistances in the resistor chain. For the applications in vacuum, the active base with resistance between the two sets of resistor chains may be preferable.