一种适用于SDH网元的自动测试模型设计

文章研究了白动测试系统集合模型．提出了一种适用于SDH网元自动测试集合模及工作模式：进而拟定测试网络的物理结构，软件平台协议支持及协议转换连接．并结合测试实例分析自动测试流程。     

5G光模块技术及方案对比

论述了5G光模块的技术和产业化发展现状,分析了4种波分复用技术应用于5G前传网络的优缺点,给出了后续5G光模块发展的策略建议.     

MPPSK调制解调器研究

为深入研究多元位置相移键控(MPPSK)调制信号的功率谱特性且改善其接收端解调性能,给出了(M>2)时的MPPSK理论功率谱的一般表达式,并设计了一种新的基于BP神经网络的解调器。在MPPSK调制原理的基础上,利用交变波和稳态波分解法推导了(M=3)3PPSK的理论功率谱解析式,并推广得到了(M>3)时的MPPSK理论功率谱一般表达式,通过仿真验证了理论推导的正确性,分析了影响MPPSK功率谱的主要因素。同时,基于已有的锁相环解调和数字冲击滤波器多路判决解调的两种方案,充分利用数字冲击滤波器输出的显著波形差异,提出了一种基于BP神经网络的MPPSK解调器,并对三种解调方案进行了仿真。仿真结果表明:新的MPPSK解调器解调性能要明显好于已有的两种解调方案。      

一种基于像素差值编码度量不确定SAR图像相似性的新方法

在SAR图像目标识别、图像匹配等应用中,定义合理可靠的相似度尤为重要。该文在分析现有SAR图像相似度基础上,提出一种基于像素差值编码的相似度准则。首先将SAR图像按照相邻像素灰度差异生成编码图像,然后以编码图像之间的一致性作为相似度。该文从理论上证明了该相似度对SAR图像中相干斑噪声、部分遮挡和模糊等因素的鲁棒性和适应性,还讨论了将该准则应用于SAR图像匹配时,如何针对不确定性,给出一定置信水平下所有合理的匹配位置。理论和实验结果表明该文提出的相似度准则对SAR图像上相干斑噪声、部分遮挡以及模糊不敏感,能有效应用于不确定SAR图像的匹配。     

H2S-Activated Ion-Interference Therapy: A Novel Tumor Targeted Therapy Based on Copper-Overload-Mediated Cuproptosis and Pyroptosis

Copper overload is a novel way to achieve copper-ion-interference therapy by disrupting copper homeostasis and treating diseases through multiple cell death pathways. However, it is difficult to reach copper overload since excess intracellular copper ions will be pumped out. Herein, copper overload is achieved by both raising cellular uptake and reducing the efflux of copper ions using hydrogen sulfide (H₂S)-responsive copper hydroxyphosphate nanoparticles (Cu₂(PO₄)(OH) NPs). After immersion in an H₂S-enriched colon cancer microenvironment, Cu₂(PO₄)(OH) NPs can transform into copper sulfide NPs with reduced size for higher cell entering, resulting in improved Fenton activity as well as copper ion dissociation. Reactive oxygen species generated by the Fenton reaction not only activate inflammasomes and Caspase-1 proteins, cause the cleavage of gasdermin D to induce pyroptosis, but also affect mitochondrial function and down-regulate copper exporter ATP7A to further reduce the copper excretion. The combination of higher endocytosis and lower exportation leads to maximized copper overload. Together with the efficient copper ions release, mitochondrial tricarboxylic acid cycle can be disrupted and iron-sulfur cluster proteins are downregulated, ultimately triggering cuproptosis. As both pyroptosis and cuproptosis are efficient ways to induce cell death, this study provides a novel way to realize effective tumor-targeted therapy based on H₂S-activated copper overload with simple Cu₂(PO₄)(OH) NPs.     

Joint optimization of power allocation and relay location for regenerative relaying with multi‐antenna reception at destination

We consider joint power allocation (PA) and relay positioning in a dual‐hop regenerative relay system with multiple antennas equipped at the destination. With a fixed relay location, an adaptive PA strategy at the source and relay under a sum power constraint that minimizes the system outage probability is presented. With a fixed PA strategy, the optimal relay location is derived. We then propose to jointly optimize PA and relay location. It is shown that employing more destination antennas and/or choosing an appropriate relay location can significantly save the power needed at the relay. Numerical results are presented to demonstrate the performance of the proposed PA and relay positioning algorithms. Copyright © 2011 John Wiley & Sons, Ltd.     

Revealing and Eliminating the Light-Soaking Issue in Metal Oxide-Based Inverted Organic Solar Cells

Inverted organic solar cells (i-OSCs) provide an exciting opportunity for commercialization owing to their excellent device air stability. However, light soaking (LS) issue generally occurs in metal oxide based i-OSCs, causing drastically decreased performance. The underlying root of LS effect is not clearly clarified until now. Herein, it is demonstrated that the surface oxygen defects on metal oxide nanoparticles, such as chemisorbed superoxide (O²⁻) and hydroxide (OH) dangling bonds, are the main reasons for LS issue in i-OSCs. The O²⁻ layer induces band bending at the cathode interface and increases the work function (WF) of metal oxide, thus leading to inefficient charge transport. The dangling bonds serve as interfacial trap states and cause non-radiative recombination, thus leading to the reduced open circuit voltage (V_oc). With ultraviolet (UV) illumination, the surface oxygen defects are interacted with photogenerated carriers, thereby improving the photovoltaic performance. Additionally, UV pretreatment of metal oxide films is employed to eliminate the LS issue and the resulting device yields significantly improved fill factors from 50.20% to 73.50% in the pristine SnO₂ based i-OSCs. This study reveals the origin of LS effect in i-OSCs and proposes a suggested model for LS mechanism.     

SLE4442及其在电子肺活量计上的应用

文章介绍了逻辑加密卡SLE4442工作原理及其在肺活量计上的具体应用过程,并设计了一种通用的IC卡接口电路.最后给出了读写卡的软件流程图,及具体的实现程序.     

舰船可视化指挥调度通信系统设想

本文结合当前舰船指挥调度通信系统的大趋势，设想了一个指挥调度系统可视化方案，组建了一个有线／无线混合的可视化指挥调度系统，说明了此系统的功能及关键技术，并在理论上阐述了方案的可行性。     

一种基于改进块匹配算法的运动车辆检测

针对传统块匹配算法计算量大、光照变化较敏感和实时性差的缺陷,本文对块匹配算法进行了相关研究,提出了改进算法。首先把两幅彩色图像转化为灰度图像,并通过概率松弛标记算法获得边缘图像,计算相邻两幅图像的差分图像得到运动区域,然后将差分图像与边缘检测图像相与得到运动区域的边缘信息,再进行匹配得到位移矢量场并对其进行矢量中值滤波,最后通过顺序区域增长将运动车辆分割出来。实验结果表明:本文方法相对于传统方法平均检测时间降低约58ms,而平均检测率提高了约6.7%。这种算法鲁棒性强、实时性好。