多小区MIMO系统中的一种主动式干扰抑制方案

针对多小区下行链路中的同频干扰问题,提出了一种新的主动式干扰抑制方案.该方案通过在各基站独立地采用预编码的方式来主动抑制本小区基站对其他相邻小区所产生的干扰.文中提出了两种实现算法:(1)迫零预编码,它可以获取和无同频干扰系统同样的性能;(2)基于干扰信道最大特征子信道的线性预编码,它能够有效地实现抑制干扰和提高本小区发遥自由度的折衷.仿真结果表明,本文方案提高了系统的性能和频谱效率.     

基于办公网络在线实验系统的实现

虚拟仪器技术的发展及应用,使远程实验办公成为可能。本文研究了基于办公网络的MatLab在线实验系统组建的多种技术方案,系统设计采用了Active X组件,COM组件等混合编程技术,服务器采用.NET框架、SQL数据库技术和网页制作技术,使先进的实验资源为办公网络中的所有用户所利用,满足办公环境下在线实验的需求。     

一种基于Web漏洞威胁模型的网站安全分析技术

网站日益受到黑客的青睐,针对Web应用程序的攻击事例屡见不鲜。如何全面、准确地分析网站面临的最大威胁成为专业信息安全公司和网站管理员的不可回避的难题。本论文借鉴攻击图的基本思想设计了漏洞威胁测试模型(VTTM),并以SQL注入漏洞为例对其进行建模,并利用两种算法分别计算了网站的最大威胁值及最优测试序列。     

基于SOPC技术的具有码流监测功能的TS流复用器设计

TS流复用器作为数字电视系统前端的关键设备,对其功能、成本、设计灵活性方面的要求越来越高.传统的复用器设计方案已经不能满足市场的需求,本文介绍一种基于可编程片上系统(SOPC)的复用器设计方案,该方案利用软硬件相结合的方法将系统集成在一款Altera公司的现场可编程门阵列(FPGA)上,不但完成了高效、稳定、可移植性强的复用器设计,而且实现了对TS流实时监测的功能.     

RADIOIMMUNOTOXICOLOGICAL EFFECT OF ENRICHED URANIUM ON CENTRAL AND PERIPHERAL IMMUNE CELLS AND THE PROTECTIVE ACTION OF IL－1 AND IL－2

ＲＡＤＩＯＩＭＭＵＮＯＴＯＸＩＣＯＬＯＧＩＣＡＬＥＦＦＥＣＴＯＦＥＮＲＩＣＨＥＤＵＲＡＮＩＵＭＯＮＣＥＮＴＲＡＬＡＮＤＰＥＲＩＰＨＥＲＡＬＩＭＭＵＮＥＣＥＬＬＳＡＮＤＴＨＥＰＲＯＴＥＣＴＩＶＥＡＣＴＩＯＮＯＦＩＬ－１ＡＮＤＩＬ－２￥ＺｈｕＳｈｏｕｐｅ...     

Color holography using the angular selectivity of volume recording media

A display hologram of an object can be recorded and reconstructed in three primary colors if the angular selectivity of volume recording media is exploited. Three holograms are recorded in the same medium, each at a different primary color. These three holograms are reconstructed by simultaneous illumination of the hologram with the original reference beams. By proper choice of the angles that the reference beams make to the hologram, it is possible to suppress strongly cross talk between the different reconstructions (e.g., the red object reconstruction in green light). The technique exhibits high resolution, high diffraction efficiency, and vivid colors. Through the addition of three holographically recorded volume gratings it is possible to reconstruct the hologram with a beam of white light. The saturation and brightness of each primary color in the reconstruction can be adjusted by selection of an appropriate thickness for the corresponding grating.     

Iterations for solving linear variational inequalities on domains with nonlinear boundaries

This paper deals with numerical methods for solving linear variational inequalities on an arbitrary closed convex subsetC of ? ⁿ . Although there were numerous iterations studied for the caseC=? ₊ ⁿ , few were proposed for the case whenC is a closed convex subset. The essential difficulty in this case is the nonlinearities ofC's boundaries. In this paper iteration processes are designed for solving linear variational inequalities on an arbitrary closed convex subsetC. In our algorithms the computation of a linear variational inequality is decomposed into a sequence of problems of projecting a vector to the closed convex subsetC, which are computable as long as the equations describing the boundaries are given. In particular, using our iterations one can easily compute a solution whenC is one of the common closed convex subsets such as cube, ball, ellipsoid, etc. The non-accurate iteration, the estimate of the solutions on unbounded domains and the theory of approximating the boundaries are also established. Moreover, a necessary and sufficient condition is given for a vector to be an approximate solution. Finally, some numerical examples are presented, which show that the designed algorithms are effective and efficient. The exposition of this paper is self-contained.     

Tuning the band gap of the CIGS solar buffer layer Cd1-xZnxS (x=0—1) to achieve high efficiency

To evaluate the impact of zinc sulfate (ZnSO4) concentration on the structural properties of the films, Cd1-xZnxS thin films were formed on glass substrates using chemical bath deposition (CBD) in this study. The effect of ZnSO4 precursor concentration on the surface morphology, optical properties, and morphological structure of the Cd1-xZnxS films was investigated. To study the impact of zinc doping content on the performance metrics of Cu(In1-xGax)Se2 (CIGS) cells in the experimental group and to improve the buffer layer thickness, simulations were run using one-dimensional solar cell capacitance simulator (SCAPS-1D) software.     

低空光电探测系统的研究现状及发展趋势

以无人机为代表的低慢小目标对当前军事产生了重大变革,特别是在复杂作战环境下对现代战争产生的威胁。本文通过对多种探测手段的分析,阐明了光电探测在低空复杂背景探测下的绝对性优势,分析了光电探测系统的研究现状,介绍了当前光电系统面临的四个主要的挑战难题:大视场远距离探测、大视场与高分辨兼容、复杂背景低虚警探测与高精度识别、多目标跟踪定位,并给出了对应的解决思路,同时也是未来光电探测系统的发展趋势,通过光电探测能力的提升,实现真正与雷达能力的匹配。     

Promote Intratumoral Drug Release and Penetration to Counteract Docetaxel-Induced Metastasis by Photosensitizer-Modified Red Blood Cell Membrane-Coated Nanoparticle

The red blood cell membrane (RBCm) provides tight protection, lowers the immunogenicity, and prolongs the circulation time of drugs in vivo when acting as the coating of drug delivery systems. However, the cellular uptake and release of drugs are hindered by RBCm. Docetaxel (DTX) is the first-line medicine for treating triple-negative breast cancer (TNBC), but it induces tumor metastasis. To solve these dilemmas, in this study, the photosensitizer 1,1-dioctadecyl-3,3,3,3-tetramethylindotricarbocyanine iodide (DiR)-modified RBCm (DM) is prepared, which is coated onto a hybrid micelle consisting of the prodrugs of DTX and the anti-metastasis agent calcitriol (CTL), obtaining a nanoparticle, named HDC-DM. In a 4T1 tumor-bearing mouse model, after injecting HDC-DM, the intratumoral DTX and CTL concentrations are increased by 1.7 and 2.5 times compared with the free drug groups. After irradiating tumors with near-infrared laser, DiR elicits the photothermal effect, triggering the rupture of RBCm and drug release, promoting drug penetration in tumors, and inducing immunogenic cell death. The tumor growth inhibition rate is 77%, and the formation of lung metastases is reduced by 82%, with good biocompatibility. It is suggested that the combination of phototherapy, chemotherapy, and anti-metastatic therapy using HDC-DM is expected to be a powerful strategy for treating TNBC.