摘要：This paper summaries the investigations on natural flyers and development of bio-mimetic micro air vehicles(MAVs)at NUAA,China,where the authors have led a group to conduct research for a decade. The investigations include the studies of low Reynolds number aerodynamics,unsteady computational fluid dynamics and flight control for the fixed-wing MAVs,the bird-like MAVs,the dragonfly-like MAVs and the bee-like MAVs.

摘要：Energy storage technology is critical for intelligent power grids. It has great significance for the large-scale integration of new energy sources into the power grid and the transition of the energy structure. Based on the existing technology of isothermal compressed air energy storage, this paper presents a design scheme of isothermal compressed air energy storage power station, which uses liquid to compress air, hydraulic piston to transfer potential energy, hydraulic turbine to generate electricity at constant pressure, and liquid occupancy to store the gas at constant pressure. Then the technical features and control strategies of its internal temperature control subsystem are studied, and the mathematical model is constructed. A hierarchical relay operation is put forward to address the actual construction and operational requirements of compressed air energy storage power plants. Finally, through physical platform experiments and MATLAB simulation, the feasibility of the design is validated.

摘要：An improved analytical design to investigate the static stiffness of a convoluted air spring is developed and presented in this *** air spring provides improved ride comfort by achieving variable volume at various strokes of the *** analytical relation is derived to calculate the volume and the rate of change in the volume of the convoluted bellow with respect to various suspension *** expression is used in the equation to calculate the variable stiffness of the *** obtained analytical characteristics are validated with a detailed experiment to test the static vertical stiffness of the air *** convoluted air bellow is tested in an Avery spring-testing apparatus for various *** bellow is modeled in the ABAQUS environment to perform finite element analysis(FEA)to understand and visualize the deflection of the bellow at various elevated internal pressures and external *** proposed air spring model is a fiber-reinforced rubber bellow enclosed between two metal *** Mooney-Rivlin material model was used to model the hyperelastic rubber material for *** the results,it is observed that the experimental and analytical results match with a minor error of 7.54%.The derived relations and validations would provide design guidance at the developmental stage of air *** expressions would also play a major role in designing an effective active air suspension system by accurately calculating the required stiffness at various loads.

摘要：Compressed air Energy Storage(CAES) has tremendous promotional value in the intermittent renewable energy supply systems. CAES has special requirements for compressor(e.g. heavy load, high pressure ratio, wide range). With advantages of higher efficiency and wider operation range, IGC(Integrally Geared Compressors) is selected to fulfill the special requirements of the large-scale CAES. To get a better aerodynamic performance, in this paper, based on the analysis of internal flow of centrifugal compressor, a multi-objective one-dimensional optimization design program was put forward combined with modified Two-Zone model and a low solidity vaned diffuser(LSVD) design method. Then, a centrifugal compressor aerodynamic component optimization design system was established with the three-dimensional blade optimization design method based on neural network and genetic optimization algorithm. Then a validation was done by redesigning the Krain-Impeller to get better performance. Finally, the aerodynamic design of the first stage of IGC was completed. The CFD calculation results indicated that the total-to-total pressure ratio of the first stage was 2.51 and the polytropic efficiency was 91.0% at the design point. What’s more, an operation margin and surge margin of the compressor was about 26.5% and 16.4% respectively.

摘要：与传统媒体广告相比,新媒体广告具有传播速度快、信息量大、覆盖面广、互动性强、投放费用低廉等优势。建立活动网站,对外发布互动性网络广告是今后新媒体广告发展的趋势。目前,国内外学者针对互动性网络广告的研究已经取得了一些成果。互动性网络广告使商品生产者和消费者之间实现了信息的交流,消费者对广告中宣传的商品进行体验,他们很享受这种体验。常见的互动性网络广告创意有两种,一种是游戏式创意,另一种是体验式创意。由于互动性网络广告的设计者注意到可以通过增强互动性来增强广告的亲和力,互动性网络广告的商业色彩大大淡化了,产品与消费者之间的关系变得很近,这有利于产品的深度推广。

摘要：设计说明：种植系统的三要素为：植物、种植模块、空间。首先,搭载于虚拟网页平台的植物应用数据库依据室内空气质量IAQ（Indoor air Quality）因素和植物物候特征进行合理植物筛选。根据平台用户的扩增,用户提供内容（User Generated Content）会愈发完善。其次,适应性种植装置采用模块化的思路,可通过虚拟平台toolkit让用户自主搭建。

摘要：为进一步提高整车气动性能,降低油耗,通过风洞气动试验,研究了air dam不同安装位置、高度和结构对整车风阻系数和前端进气的影响。结果表明:1在满足整车造型要求的基础上,air dam的安装位置应尽可能前移;2air dam在拐角处的结构很关键,需要精心设计;3相对于安装位置而言,air dam的高度对前端进气量的影响较大,故在满足路阶和接近角要求的条件下,应尽量取较大值。

摘要：By using a plane wave expansion method, some important cobweb cladding structure are analysed. Taking a dielectric parameters of designing the hollow-core fibre with material PMMA, for example, the tolerance of the parameters is discussed. The results show that the parameters of the structure possess oneself of a regularity and limit, and have a larger tolerance for the structural parameters in fabrication.

摘要：A piston-cylinder apparatus was established to measure the solubility and diffusivity of air in dimethyl silicone oils and in hydraulic oils based on the PVT state equation of air and the solution of unsteady one-dimensional diffusion *** measured diffusivity-temperature relation can be well fitted by the Arrhenius equation for engineering *** correlation between the solute diffusivity D and solvent viscosity μ is *** terms of Eyring＇s activation theory,the activation in the air-silicone-oil diffusion process is quite different from that in the momentum transport of the silicone oil：the activation entropy of the former is positive while that of latter is ***,the activation enthalpies of the two processes are in the same order of magnitude,which leads to the observation that Dμ/T is roughly constant.

摘要：With rapid development of air transportation,the airspace structure of the future will need to be flexible and dynamic to accommodate the increase in traffic *** corridors-in-the-sky has become a new technology to support the full exploitation and utilization of airspace *** paper proposes a method of designing corridor,identifying congestion state,and analyzing the influence of air routes’traffic *** this,we have reached a number of conclusions.(1)The congestion periods present the multi-peak"wavy"scattered distributions and the peaks back-end agglomeration characteristics in the whole day.(2)The congestion segments present the structural characteristics of unbalanced coverage and concentrated distribution to the crossing *** corridors with high congestion level present as an italic"N-shaped"frame,which presents incomplete penetration of short segments.(3)For the temporal and spatial interaction,there are two types of congestion segments,and there are some common congestion periods in different congestion segments of multiple *** high-density air route plays a relatively decisive role in corridor congestion,and the influence of two directions is *** research can provide a basis for the dynamic evaluation of China’s airspace resources and corridors construction in the future.