A Bifunctional-Modulated Conformal Li/Mn-Rich Layered Cathode for Fast-Charging,High Volumetric Density and Durable Li-Ion Full Cells

Lithium- and manganese-rich (LMR) layered cath-ode materials hold the great promise in designing the next-genera-tion high energy density lithium ion batteries....     

聚甲醛/共聚酰胺共混物的结晶形态及力学性能

研究了共聚酰胺含量对聚甲醛/共聚酰胺(POM/COPA)共混物结晶形态及力学性能的影响。结果表明:POM/COPA共混物中存在氢键相互作用;结晶温度对POM的结晶形态有较大影响,温度较高时POM结晶较完善,球晶尺寸较大;同时,COPA的加入使共混物的球晶细化,极大地改善了POM的韧性。当COPA含量为4%时,共混物缺口冲击强度达到最大值,拉伸强度几乎不变,POM/COPA具有较理想的综合力学性能。     

数字式无人机飞行控制系统研制

介绍了某无人机数字式飞行控制系统的设计，详细描述了系统的功能和结构配置，提出了控制策略，给出了实时飞行控制软件的功能模块及采取的关键技术，半物理仿真表明，系统具有良好的性能，达到设计要求。     

基于精细积分理论与算法体系的时变最优控制方案工程应用

以航天器的编队飞行控制为工程背景,利用PIMCSD工具箱设计了航天器远/近程逼近的时变控制方案,并在飞行控制仿真平台上通过了验证.仿真结果表明,相对于传统的定常控制器方案,新的时变控制器方案可以在更短的控制时间内,以更少的燃料消耗,达到更高的终端控制精度,从而验证了控制方案的可行性、有效性和先进性.同时,提出的时变控制器简化实现方案不仅可以保持良好的性能指标,也便于工程设计和实现.这些工作为航天器编队控制系统的工程设计提供了有益的参考.     

A cross-layer optimization based integrated routing and grooming algorithm for green multi-granularity transport networks

With the development of IP networks and intelligent optical switch networks, the backbone network tends to be a multi-granularity transport one. In a multi-granularity transport network (MTN), due to the rapid growth of various applications, the scale and complexity of network devices are significantly enhanced. Meanwhile, to deal with bursty IP traffic, the network devices need to provide continuous services along with excessive power consumption. It has attracted wide attention from both academic and industrial communities to build a power-efficient MTN. In this paper, we design an effective node structure for MTN. Considering the power savings on both IP and optical transport layers, we propose a mathematical model to achieve a cross-layer optimization objective for power-efficient MTN. Since this optimization problem is NP-hard (Hasan et al. (2010)  [11]) and heuristic or intelligent optimization algorithms have been successfully applied to solve such kinds of problems in many engineering domains (Huang et al. (2011)  [13], Li et al. (2011)  [17] and Dong et al. (2011)  [5]), a G  reen integrated R$R$outing and Grooming algorithm based on Biogeography-Based Optimization (Simon (2008)  [23]) (GRG_BBO) is also presented. The simulation results demonstrate that, compared with the other BBO based and state-of-the-art power saving approaches, GRG_BBO improves the power savings at a rate between 2%–15% whilst the high-level multi-user QoS (Quality of Services) satisfaction degree (MQSD) is guaranteed. GRG_BBO is therefore an effective technique to build a power-efficient MTN.     

基于需求预测更新的风险厌恶型报童决策分析

考虑存在需求预测信息更新下报童的最优订货策略,以均值方差理论为基础,从三类风险厌恶的模型着手,研究了零售商在信息更新的机会下,其决策对渠道的影响。研究结果表明,当决策者在最大化期望收益的同时,希望收益的方差控制在一定范围内时,阈值满足一定条件,信息更新能提高零售商的效用。当决策者在减少收益波动的同时,希望期望收益不低于一定值时,在一定条件下,信息更新同样能提高零售商的效用。最后,结合仿真,分析了采用效用函数模型时,信息更新对零售商决策的影响。     

一种基于PCI接口的1394B总线的设计与实现

1394B是一种高带宽、低延迟、高可靠特性高速串行总线,已经广泛应用于工业控制、汽车和航空航天等领域。文章设计了一种基于OHCI协议的1394B总线,主机通过PCI接口与1394B控制器之间通过DMA操作,实现数据的高速传输。     

PIN二极管变温度高频动态建模方法

The PIN diode model for high frequency dynamic transient characteristic simulation is important in conducted EMI analysis. The model should take junction temperature into consideration since equipment usually works at a wide range of temperature. In this paper, a temperature-variable high frequency dynamic model for the PIN diode is built, which is based on the Laplace-transform analytical model at constant temperature. The relationship between model parameters and temperature is expressed as temperature functions by analyzing the physical principle of these parameters. A fast recovery power diode MUR1560 is chosen as the test sample and its dynamic performance is tested under inductive load by a temperature chamber experiment, which is used for model parameter extraction and model verification. Results show that the model proposed in this paper is accurate for reverse recovery simulation with relatively small errors at the temperature range from 25 to 120 ℃.     

基于DPC的中国部分区域陆地气溶胶光学厚度反演

大气气溶胶是气候变化与遥感定量化等的重要影响因素,研究气溶胶光学特性具有重要意义.基于高分五号卫星搭载的大气气溶胶多角度偏振探测仪(Directional polarimetric camera,DPC)过境中国区域的数据,开展了气溶胶光学厚度的反演研究.基于矢量辐射传输模型6SV计算构建气溶胶光学特性查找表,采用Ro...