The Japanese economy is showing signs of recovery from economic downfall, albeit at a moderate pace.

Security software focuses on data protection, data compliance, data architecture, email and web security, data governance, data loss prevention, SIEM, and identity and access management. It has several capabilities such as encryption, endpoint monitoring, identity and access management, network monitoring, intrusion detection, vulnerability scanning, and application and messaging security.

In the face of heightened technological expectations, companies worldwide are adopting advanced programs and integration solutions to keep their businesses running smoothly. They are integrating real-time communication tools such as voice messaging, video conferencing, text SS these features is referred to as UCaaS. The widespread implementation of these solutions has made them customary for providing fast, hassle-free business communications and enhancing productivity.

A projector is a portable optical device that projects images on any surface or screen. Traditional projectors and pico projectors are the two types of projectors available; the latter is preferred over the former for its tiny size, light weight, and easy portability. Traditional projectors, in contrast, are bulky and difficult to carry around.

Data centers house infrastructure such as servers and storage units that power business operations worldwide. The physical security of data centers involves securing critical infrastructure from external threats or intrusion. Physical security includes video surveillance by cameras, physical access control systems, and perimeter security checks of the entire data center facility.

研究了Nakagami信道中联合网络编码和双向协作中继选择的中断与平均误码率的性能,基于3个时隙的网络编码方案提出了一种最小化较差用户误码率的协作中继选择策略。在Nakagami信道下,从双向通信的角度,通过理论分析得出其中断概率和平均误码率的解析式和渐近式,同时推导了无协作中继选择时网络编码的中断概率和平均误码率解析式。通过理论分析发现,当Nakagami信道衰落参数降低时,联合网络编码的协作中继选择方案相对于无协作中继选择时的性能增益将逐渐升高。数值仿真实验结果表明,所提策略的平均误码率性能要显著高于无协作中继选择时的网络编码性能。

在无线传感器网络(WSNs)中,节点复制攻击和女巫攻击可扰乱数据融合和阈值选举等网络操作.发起这两种攻击需先通过邻居发现认证过程.考虑到在WSNs中发起邻居认证是不频繁的,提出了一种基于单向密钥链的ID认证防御机制(OKCIDA),降低攻击者在任何时间段发起这两种攻击的可能性.然后基于椭圆曲线离散对数问题,构造对称参数,并组合OKCIDA和利用节点邻居关系,提出了一种无需位置的邻居认证协议(LFNA),以阻止复制节点和女巫节点成功加入网络.最后给出了安全性证明和分析,并在安全和开销方面将LFNA与已有典型防御方案进行了比较,结果表明该方案具有一定的优势.

针对异构无线网络的视频通信提出一种基于网络选择的带宽博弈算法（BAG-NS）。该算法首先根据不同用户视频特性及当前网络状况，采用层次分析法和熵值法确定网络评价参数的权重，选择最佳网络；其次构建了基于收益和代价的用户效用函数，通过分布式迭代算法得到其纳什均衡解，并证明了纳什均衡的存在性和唯一性。仿真结果表明，该算法使不同特性的视频用户合理地分布在不同网络，能兼顾用户公平性和网络拥塞控制，增加网络资源利用率，减小用户视频失真，提高用户视频质量。

为降低实现高阶矩阵SVD时的硬件复杂度和计算延时,本文改进了CORDIC迭代结构,设计了一种用于SVD的低硬件复杂度、高速CORDIC计算单元.本文以2x2矩阵为例,基于Xilinx Virtex6硬件平台设计并实现了使用优化后CORDIC计算单元的SVD模块,在19bit位宽下吞吐率达25.9Gbps.对比Xilinx IP core中同类模块,本文设计节省27.6%寄存器,27.7%查找表,实时性提高14%.对高阶矩阵,本文给出资源消耗趋势曲线,可证明优化后CORDIC计算单元能降低16阶矩阵SVD模块约40%的硬件复杂度.

脑电信号获取过程中,工频噪声干扰现象往往会使所获取的信息产生多种多形态瞬时结构波形,这种现象影响到DIVA(Directions Into Velocities of Articulators)模型对语音的正常处理.为此,本文提出了一种面向特征提取的脑电信号结构自适应稀疏分解模型,并在此基础上,通过采用匹配追踪算法求解最佳原子、使用过完备原子库中原子表示原始脑电信号等方法,实现了信号去噪的目的,效果好于传统的小波变换去噪方法.仿真实验表明,本文提出的方法提高了DIVA模型语音发音的精度.