摘要：虚拟装配技术是CAD领域研究的关键技术之一。随着计算机软硬件技术的发展,虚拟装配在个人计算机上也能够实现。本文以大型面天线为例,介绍了在division Mockup的软件环境下进行虚拟装配,并进行相应的干涉检验,截面分析等。

摘要：The notion of invisibility in Invisible Man is spoken out by the protagonist＇s growth as an orator. Rather than a recursive retrieving of his identity throughout the narrative, the invisible man reinvents his identity in his pursuit of pure persuasion. Both being terms in the Burkean system of literature rhetoric, pure persuasion, and identification become one for the unconscious purpose and the other for the symbolic action respectively in the protagonist-speaker＇s growth from an ideal emulator to speaker-audience mediator. In his identification with the audience and his ardent pursuit of pure persuasion, he paradoxically finds himself distanced from both his identity-to-be and the identity of his audience, with great division in-between. Though temporary corporation is achieved and occasional identification is resolved in the last two speeches, the protagonist only finds himself in a rhetorical context which is much more varied and more manipulative than he imagined. Such a realization renders the invisible man invisible again from the public stadium, who decides to resort to the pen for a life-long identification with the broader battlefield of racial discontinuity

摘要：This paper motivated and inspired by an interdisciplinary critical educational issue adopted for a research work approach. It concerned with application of realistic Artificial Neural Networks (ANNs) models integrating reading brain function with multi-sensory cognitive learning theory. Specifically, these models adopted to improve tutoring quality (academic achievement) while teaching children “how to read?” considering the analysis and evaluation of phonics methodology. Herein, quantitative analysis and evaluation of this issue performed by considering two computer aided learning (CAL) packages concerned with a specific selected mathematical topic namely: long division process. Via realistic modeling of packages using (ANNs) based upon associative memory learning paradigm. In more details, at educational field practice; both CAL packages have been applied for teaching children algorithmic steps performing long division processes. Moreover, learning performance evaluation of presented packages considers children outcomes’ achievement after tutoring for suggested Mathematical Topic either with or without associated tutor’s voice. Interestingly, statistical analysis of obtained educational case study results at children classrooms (for both applied packages) versus classical tutoring proved to be in well agreement with obtained after ANNs computer simulation results.

摘要：LTE (Long Term Evolution) is the latest technology in wireless communication. It is being used because of its peak data rate and spectral efficiency. LTE uses OFDMA (Orthogonal Frequency division Multiple Access) technology for radio transmission and reception in downlink. OFDM is a multicarrier modulation and multiplexing technique to improve data rate, spectral efficiency and minimize the problem of fading and ISI (Inter Symbol Interference). Many transceivers design have been designed for OFDM system to minimize error and maximize throughput of the information being transmitted and received at the system. The purpose of this article is to present a survey of the published literature which deals with various OFDM transceiver design, focusing on the merits and demerits of the corresponding OFDM transceiver design.

摘要：Traffic engineering and topology design considering multilayer configuration have become more important. While multilayer design studies usually discuss the traffic engineering issue or reliability, this paper focuses on network construction cost in studying multilayer topology design. The number of ports for the IP layer and the maximum number of Wavelength division Multiplexers (WDM) for the optical layer are used as construction cost factors. Given a traffic matrix for the IP layer, 1) the number of ports is minimized to obtain a topology and a traffic matrix for the optical link, and 2) the maximum number of WDMs is minimized to configure the optical layer topology. It is shown that both the IP and Optical path layers have been given economic topologies. We present LP formulations of this scheme and the results of a simulation of the full-mesh traffic of 5 nodes, which shows that both layers are successfully optimized.

摘要：The downlink minimum bit error rate (MBER) transmit beamforming is directly designed based on the uplink MBER receive beamforming solution for time division duplex (TDD) space-division multiple-access (SDMA) induced multiple-input multiple-output (MIMO) systems, where the base station (BS) is equipped with multiple antennas to support multiple single-antenna mobile terminals (MTs). It is shown that the dual relationship between multiuser detection and multiuser transmission can be extended to the rank-deficient system where the number of users supported is more than the number of transmit antennas available at the BS, if the MBER design is adopted. The proposed MBER transmit beamforming scheme is capable of achieving better performance over the standard minimum mean square error transmit beamforming solution with the support of low-complexity and high power-efficient MTs, particularly for rank-deficient TDD-SDMA MIMO systems. The robustness of the proposed MBER transmit beamforming design to the downlink and uplink noise or channel mismatch is investigated using simulation.

摘要：Creation of human landscape is the important component of highway landscape design,which has incomparable advantage in the aspects of transmitting cultural atmosphere and expressing regional *** can not only beautify highway environment,but also serve for traffic *** is another effective approach to ensure traffic *** paper has analyzed existing problems and insufficiencies of modern highway human construction,and discussed the means and methods of expression of historical humanized landscape in highway landscape *** paper has considered that during design of highway human landscape,it should fully explore historical and humanized background along the highway,extract cultural spirit,enrich cultural connotation,and oppose coarse and fictitious design on the basis of respecting culture and history.

摘要：The concept of cultural landscapes was introduced,and it was proposed that the construction of highway cultural landscapes should follow the principles of "protection first,secure,integrated,suitable for actual conditions,economic,natural and ecological".In this study,relevant theories were taken to analyze the design of cultural landscapes along the Ya'an-Luguhu Expressway in Sichuan *** conditions,profound cultures and historical resources in the study area were analyzed,and the construction of its cultural landscapes was further discussed from the perspectives of properly dividing landscape spaces,determining the orientation of cultural landscapes,refining regional cultures,choosing carriers of cultural landscapes,improving cultural value of important landscape nodes by using artistic settings,applying more local materials and so *** that helpful references could be provided for the landscape design of other expressways,and the integration of cultural landscapes and highway landscape system could be realized.

摘要：最近提出的插值QR分解算法有效降低了V-BLAST OFDM信号检测的复杂度。在大部分检测算法中,对信道矩阵按某策略排序后可进一步提高算法性能,但插值QR分解算法不能直接应用于这种情况。为解决这一问题,本文结合分组排序与插值QR分解的思路,通过引入不同列排序矩阵QR分解间的关系,提出一种适用于两发射天线的低复杂度排序插值QR算法。该算法可作为采用连续干扰抵消或球形译码算法的V-BLAST OFDM信号检测预处理方法。与对插值QR分解算法直接扩展的方法相比,该算法随着接收天线数的增多,复杂度节省程度更为明显,因此更适合基站接收机设计。

摘要：针对植物园管理系统综合度不高的问题,设计了基于ZigBee的植物园智能管理监测系统。系统由管理中心、控制单元和节点控制器构成。系统通过采用传感器技术实现园内智能照明控制,同时能够实时监测空气温度、湿度及烟雾浓度,以便于管理人员了解园内状况,预防火灾等情况的发生。试验表明,系统能很好地完成管理监测功能,预计在将来有很好的应用前景。