摘要：Using directional antennas in Wireless Ad hoc Networks (WANETs) offers great potential of reducing the radio interference, and improving the communication throughput. Directional antennas, however, introduces new problems in the wireless Media Access Control (MAC), that is, the deafness and new hidden terminal problem, which may cause severe performance degradation. To solve the problems, we propose an effective Circular RTR Directional MAC (CRDMAC) protocol for WANETs by using a sub-transmission channel and Ready to Receive (RTR) packets, which modifies the IEEE 802.11 Distributed Coordinated Function (DCF). The sub-channel avoids collisions to other ongoing transmission, and the RTR packets notify the neighbor nodes that the mutual transmission has been finished. We evaluate the CRDMAC protocol through simulations and the results show that the proposed protocol outperforms existing DMAC (directional MAC) protocol and the CRCM (Circular RTS and CTS MAC) protocol in terms of throughput and packet drop rate.

摘要：This paper proposes an operator based fault detection method for an actuator fault of an aluminum plate thermal process with input constraints. Operator-based robust right coprime factorization(RCF)approach is utilized in this method. After developing a mathematical model of the thermal process,a robust tracking operator system is designed for the process with input constraints. Following this, design of the fault detection system is given by using operator-based robust RCF approach. Finally, experiment is conducted to support the proposed design method

摘要：High-pressure ratio and wide operating range are highly required for a turbocharger in diesel engines.A recirculation flow type casing treatment is effective for flow range enhancement of centrifugal *** ring grooves on a suction pipe and a shroud casing wall are connected by means of an annular passage and stable recirculation flow is formed at small flow rates from the downstream groove toward the upstream groove through the annular *** shape of baseline recirculation flow type casing is modified and optimized by using a multi-point optimization code with a metamodel assisted evolutionary algorithm embedding a commercial CFD code CFX from *** numerical optimization results give the optimized design of casing with improving adiabatic efficiency in wide operating flow rate *** analysis of design parameters as a function of efficiency has been *** is found that the optimized casing design provides optimized recirculation flow rate,in which an increment of entropy rise is minimized at grooves and passages of the rotating impeller.

摘要：以便建立设计一台极端微离心的压缩机的方法论，是一个极端微煤气的汽轮机单位的最重要的部件，最后的目标压缩机的 10 次尺寸(impeller 外部直径 40 公里，改正的旋转速度 220,000 r/min ) 被设计。为精简要解决的问题被检验，当第一由于它的生产率当模特儿， 2-dimensional impeller 被选择。常规 1D 预言方法和 CFD 被使用。建原型的压缩机被以 110,000 r/min 的减少的速度使用冷空气测试。对 10 次模型，后面期末考试的 5 次尺寸充分让 3-dimensional 塑造的目标模型(impeller 外部直径 20mm，改正的旋转速度 500,000 r/min ) 被以 250,000 r/min 的减少的速度使用热气体设计并且测试。关键词离心的压缩机 - 表演特征 - 3-dimensional impeller CLC 数字 TK474.

摘要：为一个极端微煤气的汽轮机系统的开发的主要问题从内部流动和性能特征的看台点简短被讨论。对这些后面，为极端微煤气的汽轮机的极端微离心的压缩系统的发展与设计和生产过程被解释。极端微离心的压缩机的测量结果被显示出。

摘要：试验性的调查为斜流动扇子的定子的内部流动被进行。中心表面和定子片的吸表面附近的角落分离上被集中。以设计流动率，在定子插头减少的轴的速度和全部的压力的价值接近吸表面在在由角落墙的影响的中心表面附近。以设计流动率的 80 90 % 的低流动率，表面能被发现的在吸表面和中心之间的角落分离，它广泛地变得在设计流动率的 80 % 传播了。

摘要：High-pressure ratio and wide operating range are highly required for compressors and blowers. The technical issue of the design is achievement of suppression of flow separation at small flow rate without deteriorating the efficiency at design flow rate. A numerical simulation is very effective in design procedure, however, cost of the numerical simulation is generally high during the practical design process, and it is difficult to confirm the optimal design which is combined with many parameters. A multi-objective optimization technique is the idea that has been proposed for solving the problem in practical design process. In this study, a Low Solidity circular cascade Diffuser(LSD) in a centrifugal blower is successfully designed by means of multi-objective optimization technique. An optimization code with a meta-model assisted evolutionary algorithm is used with a commercial CFD code ANSYS-CFX. The optimization is aiming at improving the static pressure coefficient at design point and at low flow rate condition while constraining the slope of the lift coefficient curve. Moreover, a small tip clearance of the LSD blade was applied in order to activate and to stabilize the secondary flow effect at small flow rate condition. The optimized LSD blade has an extended operating range of 114 % towards smaller flow rate as compared to the baseline design without deteriorating the diffuser pressure recovery at design point. The diffuser pressure rise and operating flow range of the optimized LSD blade are experimentally verified by overall performance test. The detailed flow in the diffuser is also confirmed by means of a Particle Image Velocimeter. Secondary flow is clearly captured by PIV and it spreads to the whole area of LSD blade pitch. It is found that the optimized LSD blade shows good improvement of the blade loading in the whole operating range, while at small flow rate the flow separation on the LSD blade has been successfully suppressed by the secondary flow ef

摘要：为一般不明确的非线性的时间延期系统的柔韧的稳定控制器的系统的递归的设计方法在这份报纸被调查。一条延期无关的州的反馈控制法律能被递归地构造 Lyapunov-Razumikhin 功能获得。以便柔韧的稳定控制法律的设计没有为系统的任何限制，由一些设计技术，对 Razumikhin 条件的应用程序内在的障碍才能被移开。

摘要：基于的波浪精力种的震荡的水列(OWC ) 为把灵魂力量变换成柄力量与双向汽轮机的几种类型被设计了。有连接指南翼和固定指南翼的推动汽轮机在印度波浪精力植物被测试了。这在有井鈥檚 汽轮机的起始的试验以后。与有一个线性抑制特征的井鈥檚 汽轮机相对照，推动汽轮机有非线性的抑制。这在全面精力变换有重要效果从向电线招手。优化波浪精力植物与在大量流动系数上的线性抑制和好效率要求一台汽轮机。这个工作描述如此的一个图案怎么能用固定指南翼推动汽轮机被做。印度波浪精力植物被用作案例研究。

摘要：本文报道了一种利用集成力传感和液体交换功能的微流控芯片测量单个细胞力学性能的方法。使用光学镊子操纵和定位在推力探针和力传感器探针之间的单个细胞。这两个芯片探针被设计用来捕获和变形细胞。通过移动由外力驱动的推动探针,使单个细胞变形。层流在探针之间形成液-液界面,改变细胞外环境。通过控制注入压力来改变界面的位置。调节两个正压和一个负压以平衡流动的扩散和扰动。在微流控芯片中测试了单胞藻菌株PCC 6803在不同渗透浓度环境下的力学性能。液体交换在0.3~0.7 s内完成,同时显示了单个电池的动态变形。可在30 s内测量不同渗透浓度下的两个杨氏模量值和单个细胞在渗透冲击下的动态响应。研究了野生型(WT)和突变型聚囊藻细胞的动态变形,以揭示机械敏感(MS)通道的功能机制。该系统提供了一种监测单个完整细胞响应快速外部渗透变化的实时力学动力学的新方法,为表征细胞中质谱通道的准确生理功能开辟了新的机会。