摘要：Airship shape is crucial to the design of stratosphere airships. In this paper, multidisciplinary design optimization (MDO) technology is introduced into the design of airship shape. We devise a composite objective function, based on this technology, which takes account of various factors which influence airship performance, including aerodynamics, structures, energy and weight to determine the optimal airship shape. A shape generation algorithm is proposed and appropriate mathematical models are constructed. Simulation results show that the optimized shape gives an improvement in the value of the composite objective function compared with a reference shape.

摘要：A 3D synchronism deployable antenna was designed, analyzed, and manufactured by our research group. This an-tenna consists of tetrahedral elements from central element. Because there are springs at the ends of some of the rods, spider joints are applied. For analysis purpose, the structure is simplified and modelled by using 2D beam elements that have no bending stiffness. Displacement vectors are defined to include two translational displacements and one torsional displacement. The stiff-ness matrix derived by this method is relatively simple and well defined. The analysis results generated by using software de-veloped by our research group agreed very well with available test data.

摘要：酸的 oligosaccharide 糖链(AOSC ) ， D-mannuronic 酸 oligosaccharide，源于棕色的水藻多糖，被完成了阶段我在是的中国的临床的试用 anti-Alzheimer 的疾病(广告) 药候选人。在神经原的 AOSC 有约束力的蛋白质的鉴定为理解它的行动机制是很重要的。为了在调停的神经原决定 AOSC 的有约束力的蛋白质，它的反广告活动，共焦的显微镜学，亲密关系层析，和液体层析双人脚踏车集中 spectrometry (LC-MS/MS ) 分析被使用。AOSC 在集中绑在 SH-SY5Y 房间的共焦的显微镜学分析表演 -- ，时间 -- ，并且温度依赖者时尚。AOSC 有约束力的蛋白质被亲密关系层析净化并且由 LC-MS/MS 分析识别了。结果证明有 349 蛋白质绑定 AOSC，包括 clathrin，适配器 protein-2 (AP-2 ) 和淀粉的先锋蛋白质(应用软件) 。这些结果建议到神经原的 AOSC 的绑定 / 入口为反广告活动可能负责。

摘要：We present a new structure of nearly-zero flattened dispersion and highly nonlinear photonic crystal fiber （PCF） in the telecommunication window. This fiber design is comprised of a hybrid-core region with bismuth-doped region in the center and three lower bismuth-doped regions in the first ring that enables dispersion control while maintaining a high nonlinear coefficient. Numerical analysis results show that the proposed PCF is achieved with a nonlinear coefficient of about 3301 W ^-1 km^-1, a dispersion value of about 0.5537 ps/（***） at 1550 nm, and nearly-zero flattened dispersion fluctuating within 2.5 ps/（***） ranging from 1.496 to 1.596 μm.

摘要：In the process of multidisciplinary design optimization, there exits the calculation complexity problem due to frequently calling high fidelity system analysis models. The high fidelity system analysis models can be surrogated by approximate models. The sensitivity analysis and numerical noise filtering can be done easily by coupling approximate models to optimization. Approximate models can reduce the number of executions of the problem's simulation code during optimization, so the solution efficiency of the multidisciplinary design optimization problem can be improved. Most optimization methods are based on gradient. The gradients of the objective and constrain functions are gained easily. The gra- dient-based Kriging (GBK) approximate model can be constructed by using system response value and its gradients. The gradients can greatly improve prediction precision of system response. The hybrid optimization method is constructed by coupling GBK approximate models to gradient-based optimiza- tion methods. An aircraft aerodynamics shape optimization design example indicates that the methods of this paper can achieve good feasibility and validity.

摘要：Double-weight optical code division multiple access（OCDMA） systems are proposed for studying differentiated quality-of-service transmission. Based on quadratic congruence code（QCC）, we construct a one-dimensional double-weight code family, which can be well utilized in incoherent synchronous double-weight OCDMA networks. By introducing algebraic transformation to code sequences of QCC in level 1, we obtain multiple double-weight codes with cross-correlation 1. Under the same-bit-power assumption, the performance of low-weight codes can be significantly improved and is always superior to that of high-weight codes in double-weight OCDMA systems with power control. This property is contrary to previous conclusions under the same-chip-power assumption.

摘要：目的:产品概念设计是一种复杂的认知活动过程,在产品生命周期中具有极其重要的作用。目前对产品概念设计的智能化方向主要集中在概念生成与评价等离散阶段,尚缺乏系统性的智能化概念设计方法。本文的目的是在形式化与系统化概念设计过程中,实现设计的计算化与智能化,支持计算机辅助设计的发展与应用。创新点:1.结合工程设计与认知科学,提出多阶段设计认知模型表达产品设计过程;2.采用计算智能算法,实现设计认知模型的智能求解。方法:1.通过分析设计者的设计过程规律,结合认知心理学构建符合设计流程的多阶段设计认知模型(图1);2.通过引入计算智能算法,分别对认知模型中概念联想、概念组合和方案评价进行认知计算,实现设计过程的正向求解(图2);3.通过仿真模拟,运用认知计算方法对液压机产品进行概念设计求解,得到相关的设计方案,并验证所提方法的可行性和有效性(表3)。结论:1.产品概念设计过程可抽象为概念生成、概念组合和方案评价的认知过程;2.认知过程可以引入计算智能方法对其进行分别模拟计算;3.运用认知计算方法对产品进行概念设计,可以显著提高设计效率,同时有助于设计自动化的实现。

摘要：On the basis of the current sheet model,a new analytical solution for permanent magnet(PM) bearings is *** with analytical methods based on the coupling energy model and the magnetic dipole model,the proposed one is more physically intuitive and convenient for engineering *** to the analytical model,the thrust characteristics of a novel PM thrust bearing is studied and verified by finite element analysis(FEA).In the proposed thrust bearing configuration,the rotor is composed of stacked PM rings with alternative axial magnetization directions,and the stator with alternative radial magnetization directions while copper rings are used to separate adjacent PM rings.A prototype PM thrust bearing with the proposed configuration is designed and *** performances of the PM thrust bearing are experimentally *** is shown that the calculation accuracy of the presented analytical solution is satisfying.

摘要：By proposing the multi-step control set and using it as the terminal set, a new design method of robust model predictive control (MPC) is presented for the constrained polyhedral uncertain systems. Through designing a series of feedback control laws, the new robust controller can achieve large feasible region and high control performance. The characteristic property of the multi-step control set also makes it possible to derive an algorithm with low online computation burden. It could make a good trade off among the initial feasible region, the control performance, and the online computation burden. The numerical examples verify these results.

摘要：We propose the spectrum allocation and resource scheduling algorithms in cognitive point to multipoint (PMP) networks with rapid changes of spectrum opportunities and present a media access control (MAC) protocol based on these algorithms. The objective of spectrum allocation is to make efficient use of the spectrum while maintaining the transceiver synchronization on frequency and time in the network. The objective of resource scheduling is to guarantee the quality of service (QoS) requirements of different kinds of connections and to minimize the total energy consumption in the network as well. By sensing only a small set of possible channels in each slot based on the state transition probability of each channel, our spectrum allocation algorithm achieves high spectrum efficiency in the network. The resource scheduling problem is divided into three sub problems and we derive optimal solutions to these problems by greedy algorithm and convex optimization. The simulation results show that our algorithm can make efficient use of the spectrum and the network resources at a cost of low computational complexity.