An Improved Transmission Scheme of TR-SWIPT Technique

Wireless Personal Communications - The traditional simultaneous wireless information and power transfer (SWIPT) system uses a part of signals to decode information, and the other part is used for...     

Process monitoring using auto-associative,feed-forward artificial neural networks

The potential of using artificially simulated neural networks as intelligent, adaptive process-monitoring devices is discussed. The investigation is considered as a method for automatic, intelligent exception reporting for quality control applications. The technique is also compared with the conventional statistical approaches of principal component analysis and Kohonen's feature map. The applications of the technique in aerospace and manufacturing environments are presented and a possible extension of the method to incorporate a diagnostic function is discussed.Seconded from Cheltenham and Gloucester College of Higher Education as a Royal Society/SERC Research Fellow at Smith's Industries Aerospace and Defence Systems, Bishop's Cleeve, Cheltenham, UK.     

全IP移动通信网网络层移动性管理

首先介绍了全IP移动通信网网络层移动性管理的概念、框架和最经典的移动IP（Mobile IP）协议，然后讨论了基于Mobile IP的四种主要扩展方案：蜂窝IP、切换敏感无线接入Internet结构（HAWAII)、电信增强移动IP（TeleMIP）和边缘移动性体系结构（EMA）方案，最后结合第三代移动通信发展的状况得出了一些结论。     

Video compression using spatiotemporal regularity flow.

We propose a new framework in wavelet video coding to improve the compression rate by exploiting the spatiotemporal regularity of the data. A sequence of images creates a spatiotemporal volume. This volume is said to be regular along the directions in which the pixels vary the least, hence the entropy is the lowest. The wavelet decomposition of regularized data results in a fewer number of significant coefficients, thus yielding a higher compression rate. The directions of regularity of an image sequence depend on both its motion content and spatial structure. We propose the representation of these directions by a 3-D vector field, which we refer to as the spatiotemporal regularity flow (SPREF). SPREF uses splines to approximate the directions of regularity. The compactness of the spline representation results in a low storage overhead for SPREF, which is a desired property in compression applications. Once SPREF directions are known, they can be converted into actual paths along which the data is regular. Directional decomposition of the data along these paths can be further improved by using a special class of wavelet basis called the 3-D orthonormal bandelet basis. SPREF -based video compression not only removes the temporal redundancy, but it also compensates for the spatial redundancy. Our experiments on several standard video sequences demonstrate that the proposed method results in higher compression rates as compared to the standard wavelet based compression.     

等距码的对偶距离分布及其性质

本文主要讨论了等距码的对偶距离分布及其性质，然后利用这些性质将［１］中的某些结果推广到ｑ元等距码情形，并得到了其对偶距离分布的递推关系式，最后，本文给出了ｑ元等距码的码字数目的一个上界。     

The thermodynamic performance of a new solution cycle in double absorption heat transformer using water/lithium bromide as the working fluids

In this paper, a new solution cycle in the double absorption heat transformer is presented and the thermodynamic performance of this new cycle is simulated based on the thermodynamic properties of aqueous solution of lithium bromide. The results show that this new cycle is superior to the cycle being studied by some researchers. This new solution cycle has a wider range of operation in which the system maintains the high value of COP and has larger temperature lifts and operation stability. The relationship between the absorber and the absorbing evaporator is more independent and this makes the operation and control of the system more easier.     

A study of neutron and gamma radiation effects on transmission of various types of glasses, optical coatings, cemented optics and fiber

A study of radiation effects on various types of glasses, dielectric optical coatings, cemented optics and fiber was undertaken with a view to select them for extreme radiation environments. Samples were exposed to different radiation doses in the Pakistan Research Reactor-I (PARR-I) for neutron and Cobalt 60 source for gamma irradiation. Transmissions were measured before and after irradiation. The dielectric coatings were subjected to additional tests (adhesion, abrasion and humidity, etc.) as per MIL-M-13508C and MIL-C-675C. All 15 glasses studied showed varying amounts of transmission loss as expected, with negligible degradation for three types. Recovery of transmissions with time/ageing was also studied, with more or less complete recovery with temperature annealing. A faster bleaching of darkened/brown glasses was achieved by using UV lamps or UV laser. The dielectric coatings (HR, AR) and one of the two commercial optical cements showed excellent resistance to neutrons and gamma radiations, and could be good candidates for the fabrication and utilization of optical components in extreme radiation environments. The data allowed several Chinese glasses to be studied for the first time.     

便携式数控系统ARM监控平台的设计

在数控系统中,通常需要利用串口或者CAN总线进行数据监控,针对满足其数据采集与发送及存储的技术要求,提出一种便携式的数控系统监控平台设计方法;基于Freescale的ARM芯片MCIMX357与Linux操作系统,利用外围接口电路,实现大容量数据存储、串口多模式通信、CAN总线数据监控,同时附加人机友好界面,利用配套电源管理方案实现低功耗便携功能;通过测试表明设计合理可靠,功耗为3.5W,串口通信频率为115200bps,CAN通信速度为500K,同时该设计成果成功应用于我单位某型数控系统中。     

Investigations on the Three Commercial Species of Rosaceae

Physico-chemical properties of the seed oils of three species of Rosaceae family, namely Prunus armeniaca (apricot), Prunus cerasifera (prune), and Prunus persica (peach) have been determined. Fatty acid composition of the oils and amino acids composition of seed cake proteins have also been determined and their utility in every day life has been discussed.     

一种计及频率偏移的谐波与邻近间谐波估计方法

新能源大规模并网会诱导电力信号中出现关于基波/谐波对称的邻近间谐波对或单个邻近间谐波。对信号中各频率成分进行参数估计时,往往需要获知邻近间谐波的类型以构建准确的计算模型。而当电网频率偏离额定值时,频谱泄露干扰将使该要求难以实现。为此,本文提出一种在频率偏移时依然有效的邻近间谐波类型判据及基于此判据的谐波与邻近间谐波参数估计方法。首先,通过分析频率偏移与泄露谱线的映射关系,抑制基波与谐波的频谱泄露以提取邻近间谐波谱线;然后,通过对比不同类型邻近间谐波的频谱差异,提出利用谱线比值作为邻近间谐波类型判据;最后,基于邻近间谐波类型信息,构建邻近间谐波谱线方程以精准估计谐波及邻近间谐波参数。本文所提方法在频率偏移时仍能准确判断邻近间谐波的类型,并能实现更精准的参数估计,仿真验证了本文方法的准确性。