有色噪声激发下结构随机振动离散分析方法

本文以线性结构体系在白噪声激发下随机振动离散分析方法为基础,对线性结构体系在有色噪声激发下的随机振动离散分析方法进行了研究。给出均值、均方响应的离散递推式.并为了能在计算机上进行实际运算,给出了实用化计算公式,最后用该方法对一结构进行了实际计算,分析了计算结果。     

软件漏洞模糊测试的关键分支探索及热点更新算法

在软件开发及应用中,由于具有可复现性,模糊测试能够帮助发现漏洞和有针对性地对漏洞成因进行分析。为了解决模糊测试过程的效率及测试力度等问题,提出了软件漏洞模糊测试的关键分支探索及热点更新算法。该方法通过捕获、分析和利用受检程序在处理测试用例时的执行位置的关键信息,以指导模糊测试过程的探索方向和测试用例的生成。实验结果表明,提出的方法相较于传统随机发散的模糊测试方法在漏洞发现能力上有较大提升,在Otfcc、Swftools等14个开源程序中发现了100余个未被公布的漏洞,为模糊测试用于软件漏洞检测提供了新的可靠途径。     

基于Base64编码的数据加密技术

深入分析了Base64编码的原理，给出了基于动态编码表的Base64编码数据加密方法。     

89C51单片微机在自动定位系统中的应用

针对枕式包装机定位系统存在的问题，提出并研制了基于单片机机的控制系统，该系统使包装定位精确，实现袋长和袋速的予置和实时检测等功能，实际运行平稳可靠，效果良好。     

Bad-scenario-set robust scheduling for a job shop to hedge against processing time uncertainty

This paper proposed two robust scheduling formulations in real manufacturing systems based on the concept of bad scenario set to hedge against processing time uncertainty, which is described by discrete scenarios. Two proposed robust scheduling formulations are applied to an uncertain job-shop scheduling problem with the makespan as the performance criterion. The united-scenario neighbourhood (UN) structure is constructed based on bad scenario set for the scenario job-shop scheduling problem. A tabu search (TS) algorithm with the UN structure is developed to solve the proposed robust scheduling problem. An extensive experiment was conducted. The computational results show that the first robust scheduling formulation could be preferred to the second one for the discussed problem. It is also verified that the obtained robust solutions could hedge against the processing time uncertainty through decreasing the number of bad scenarios and the degree of performance degradation on bad scenarios. Moreover, the computational results demonstrate that the developed TS algorithm is competitive for the proposed robust scheduling formulations.     

Oxy210, a Semi-Synthetic Oxysterol,Exerts Anti-Inflammatory Effects in Macrophages via Inhibition of Toll-like Receptor (TLR) 4 and TLR2 Signaling and Modulation of Macrophage Polarization

Inflammatory responses by the innate and adaptive immune systems protect against infections and are essential to health and survival. Many diseases including atherosclerosis, osteoarthritis, rheumatoid arthritis, psoriasis, and obesity involve persistent chronic inflammation. Currently available anti-inflammatory agents, including non-steroidal anti-inflammatory drugs, steroids, and biologics, are often unsafe for chronic use due to adverse effects. The development of effective non-toxic anti-inflammatory agents for chronic use remains an important research arena. We previously reported that oral administration of Oxy210, a semi-synthetic oxysterol, ameliorates non-alcoholic steatohepatitis (NASH) induced by a high-fat diet in APOE*3-Leiden.CETP humanized mouse model of NASH and inhibits expression of hepatic and circulating levels of inflammatory cytokines. Here, we show that Oxy210 also inhibits diet-induced white adipose tissue inflammation in APOE*3-Leiden.CETP mice, evidenced by the inhibition of adipose tissue expression of IL-6, MCP-1, and CD68 macrophage marker. Oxy210 and related analogs exhibit anti-inflammatory effects in macrophages treated with lipopolysaccharide in vitro, mediated through inhibition of toll-like receptor 4 (TLR4), TLR2, and AP-1 signaling, independent of cyclooxygenase enzymes or steroid receptors. The anti-inflammatory effects of Oxy210 are correlated with the inhibition of macrophage polarization. We propose that Oxy210 and its structural analogs may be attractive candidates for future therapeutic development for targeting inflammatory diseases.     

万兆以太网物理层编码芯片设计

提出了一种并行处理的编解码方案。采用这种方案．设计了万兆以太网10GBASE-R标准的物理编码子层发送端芯片。芯片由64b／66b编码、扰码和变速箱3部分组成。考虑到测试问题，该芯片内置了伪随机码数据源。这种方案的优点是逻辑简单、速度快。芯片采用TSMC 0.18μmCMOS工艺，用全定制方式实现。芯片引脚分布时参照PLCC48规格。     

LRCRaft: 支持节点数据快速恢复的共识协议

在支持纠删码的分布式存储系统中, 最常用的编码是RS (Reed-Solomon)码. 对于一个RS(k, m)编码条带, 常见的配置是一个节点仅存储条带中的一个分片, 这导致在节点出现故障的情况下, 对其存储分片的恢复需要跨多个节点读取分片并重新编码生成恢复分片, 容易造成系统网络拥塞. 在需要恢复大量数据的场合, 系统在恢复期间会处于较长时间的脆弱期, 容错能力和吞吐量下降、读写时延升高时有发生. LRCRaft是一个基于LRC (local reconstruction code)的改进Raft共识协议, 通过在Raft中引入LRC码、动态日志增补、状态机删减和分片版本一致性等机制, 降低了Raft的读写时延, 缩短了节点故障恢复时间. 实验结果表明, 相较于Raft, LRCRaft在不同恢复模式中恢复一个单节点故障数据时, 恢复用时有着49.25%–74.97%的减少.     

换流器故障在线监测电气量及其诊断系统

利用故障信号能量变化率量化换流器各类故障的电气特征,表征换流器故障信号相对于正常状态的变化情况。根据各电气量变化情况的不同,选择出能有效定位和诊断换流器各类故障的在线监测电气量。将各在线监测电气量的能量变化率与零进行比较,得到换流器不同故障情况下,各在线监测电气量逻辑编码值。利用编码值的不同,再结合统计学知识,提出换流器故障在线监测诊断系统。仿真结果表明,该系统能准确有效地定位和诊断出换流器各类故障,且不受系统运行方式和故障过渡电阻的影响。     

一种伪随机码引信对TBM目标的电磁散射特性分析

分析了 TBM目标特点 ,针对一种伪随机码引信 ,计算了该目标的镜面反射点的位置和强度 ,建立了目标近区电磁散射的数学模型 ,给出了针对该引信的目标回波信号的表达式