SIMECK密码代数故障攻击研究

针对SIMECK密码给出一种代数故障攻击方法。首先给出SIMECK加密轮函数和密钥生成策略等效代数方程创建方法;分别设定故障已知模型和故障未知模型,并在故障未知模型下提出基于故障注入差分和基于正确/故障密文差分确定故障索引值两种策略创建故障信息方程;利用基于SAT问题求解方程组。结果表明,在SIMECK32/64第24轮注入单比特翻转故障,故障已知模型和基于故障注入差分的故障未知模型均仅需2次注入即可恢复完整64比特主密钥;在第27轮注入故障,基于密文差分的未知模型需9次注入可恢复完整主密钥。与已有研究相比,该攻击密钥搜索复杂度更低,所需故障注入样本量更少。     

缆索内置光纤光栅传感器胶接植入试验研究

为实现光纤光栅传感器胶接固定于桥梁缆索钢丝以监测缆索索力,利用胶接结构的剪切测试、钢丝疲劳测试和循环加卸载测试分别对光纤光栅传感器支座与钢丝间胶接结构的剪切性能、疲劳可靠性以及胶接光纤光栅传感器的测试性能进行评估.试验发现:光纤光栅传感器支座与桥梁缆索钢丝间的胶接结构具有较大的剪切载荷,且200万次疲劳载荷对其胶接结性能影响较小;胶接固定于钢丝上的光纤光栅传感器可测出钢丝加卸载的滞回效应,并每个循环加、卸载的波长和钢丝承载载荷关系呈线性且分别重合.结果表明:内置光纤光栅传感器的胶接固定结构具有良好的剪切力学性能和疲劳可靠性,可保证其光纤光栅传感器的测试具有良好的准确、稳定、可靠性.     

单分散硅油乳液的制备

介绍了一种单分散硅油乳液制备新方法。利用二甲基二乙氧基硅烷在碱性条件下乳液聚合, 制得分散度为0.005,有效乳粒尺寸700～2000nm的单分散硅油乳液。该方法具有很好的可重复性。     

轻量级分组密码SIMON代数故障攻击

针对SIMON现有故障攻击中存在的故障深度小、手工推导复杂等问题,给出一种代数故障攻击（AFA）方法。首先给出SIMON核心运算‘&’代数表示方法并构建全轮正确加密代数方程组;其次注入故障并将故障信息表示为代数方程,提供故障已知和故障未知两种模型,给出两种模型故障表示方法;最后利用CryptoMinisat-2.9.6解析器求解方程组恢复密钥。实验结果表明：利用单比特故障对SIMON32/64进行攻击,故障位置选取第26轮,故障已知和未知模型仅需5个和6个故障即可恢复全轮密钥;利用n比特宽度故障对SIMON128/128进行攻击,故障位置选取第65轮,两种模型均只需2个故障即可恢复全轮密钥。此外,对比故障已知和未知模型发现,随故障数递增密钥求解时间的决定因素将由故障信息量变为方程组计算量。     

鸡笼山金矿采场中深孔控制爆破研究

为满足鸡笼山金矿中长期开采规划的要求,结合-130m35#采场的工程地质概况,分别对孔-117m切割槽,1～14排、15～51排落矿中深孔进行了凿岩爆破设计,同时评估了爆破效果。结果表明,鸡笼山金矿中深孔控制爆破设计是成功的,爆破矿石块度大多为0.3m×0.3m,炸药消耗也明显下降,取得了良好的技术经济效果。     

Co-delivery honokiol and doxorubicin in MPEG-PLA nanoparticles

The combination chemotherapy is an important protocol in cancer therapy. Honokiol shows synergistic anticancer effect with doxorubicin. In this paper, honokiol and doxorubicin co-loaded MPEG-PLA nanoparticles were prepared. The particle size, morphology, in vitro release profile, cytotoxicity and cell proliferation study were studied in detail. The results indicated that honokiol and doxorubicin could be efficiently loaded into MPEG-PLA nanoparticles simultaneously, and could be released out in an extended period in vitro. Meanwhile, honokiol and doxorubicin in MPEG-PLA nanoparticle could efficiently suppress cancer cell proliferation in vitro. The described honokiol and doxorubicin co-loaded MPEG-PLA nanoparticle might be a novel anticancer agent.     

利川腌菜细菌菌群多样性及其与风味相关性研究

以利川腌菜为研究对象,使用Illumina MiSeq高通量测序技术对样品中的细菌菌群结构进行解析,并采用电子鼻技术对腌菜中的风味品质进行研究。结果表明。利川腌菜优势细菌属为乳杆菌属（Lactobacillus）、棒状杆菌属（Corynebacterium）、假单胞菌属（Pseudomonas）、芽孢杆菌属（Bacillus）和嗜冷杆菌属（Psychrobacter）,相对含量分别为17.1%、10.5%、9.5%、7.6%和6.4%。电子鼻测定结果表明,腌菜中W5S（氮氧化合物）、W1S（甲烷）、W1W（萜类化合物）和W2S（乙醇）的响应值较高,分别为44.83、79.90、52.04和43.25。通过Spearman相关性分析显示变形杆菌属（Proteus）与多种芳香成分呈显著负相关（P＜0.05）,嗜冷杆菌（Psychrobacter）与甲烷和氢气呈正相关,肠球菌属（Enterococcus）与乙醇等呈正相关,表明利川腌菜中风味物质的形成可能由多种微生物共同作用,而非单一微生物发酵产生。     

基于非线性整数规划的卷纸分切排产方案优化算法研究

为了减少造纸厂卷纸分切时因排产方案不合理而产生的人力、能源、时间等资源的浪费,以降低企业生产成本,提出了一种基于非线性整数规划的卷纸分切排产方案优化算法。该算法思想包括:首先根据客户订单需求建立数学模型,其次对模型进行优化,有效地提高求解效率,最后用非线性整数规划的方法求解出最优排刀方案。实验结果表明,该算法可以有效地获得卷纸分切的最优排产方案,并可用于实际卷纸生产过程中。     

Composite‐modified anode by MnO2/polypyrrole in marine benthic microbial fuel cells and its electrochemical performance

Low power limits the application of microbial fuel cells (MFCs). Our research mainly focuses on the modification of the electrode and looking for new anode material for high‐power marine benthic microbial fuel cells(BMFCs). A MnO₂/PPy composite‐modified anode was fabricated by in situ chemical polymerization. Surface topography and properties were characterized by scanning electron microscopy and infrared spectroscopy, respectively, indicating that the MnO₂/PPy composite is of a ‘mosaic‐like’ microstructure. The electrochemical performance and wettability of different kinds of anode were investigated respectively. Cyclic voltammetry and linear sweep voltammetry tests show that MnO₂/PPy composite‐modified electrode has a typical capacitance feature; its capacitance is 3.1 times higher than that of unmodified electrode. Contact angle of the composite‐modified anode reduces to 46 ± 0.5°, and its kinetic activity increased for more than 1.1 times. The maximum output power density of MnO₂/PPy composite‐modified cell reached 562.7 ± 10 mW m^?2, which is 2.1‐fold of the unmodified one. Finally, the composite‐modified anode provides an alternative potential choice for high‐performance cell, and the possible influence mechanism of composite materials on the BMFCs was also analyzed. Copyright © 2016 John Wiley & Sons, Ltd.