复合材料层合板结构的概率与非概率模型

将非概率模型引入复合材料的可靠性分析,建立了一种包含概率和非概率分析的混合模型．对存在初始缺陷的层合板系统。将初始缺陷等不确定性因素根据所掌握数据的多少分别采用概率和非概率模型来描述,通过Tsai—Wu准则进行强度分析,运用一阶矩方法得到可靠性指标,来评估复合材料层合板系统的可靠性．结果表明,对于那些掌握数据较少,而无法准确描述其分布形式的变量,采用混合模型是一种较好选择．     

HPLC法同时测定没食子酸与没食子酸烷基酯的含量

为了同时测定没食子酸烷基酯生物合成体系中没食子酸与没食子酸炕基酯的含量,用HPLC法,色谱条件为:Lichrospher C18柱(250mm×4.6 mm);检测波长274 nm;流动相:A相5 mL冰醋酸溶于1 000 mL 水,B相80%甲醇,A:B=30:70;流速:1.0 mL/min。结果反应物没食子酸与产物没食子酸炕基酯达到基线分离。48 h反应体系中,没食子酸、没食子酸丙酯与没食子酸丁酯回收率达到94.07%-96.11%RSD 为0.701-1.180。说明此方法可有效同时测定没食子酸与没食子酸烷基酯的含量,测定单宁酶的活力。     

前向安全数字签名在证书管理中的应用

CA对证书管理的困难性是影响PKI发展的主要原因。利用前向安全数字签名理论和技术设计了一个证书管理方案,保证了一个PKI系统在CA签名密钥泄露的情况下。如果马上更换签名密钥,则不用对以前颁发的证书做任何处理,使损失最小,效率最高。同时由于签名中所含有的时间段信息,使每个证书都自动包含时间戳,省掉时间戳服务器,节省开销。     

超精密运动平台隔振系统性能分析与实验研究

分析了极微细电火花加工的三维超精密运动平行隔振系统的组成及工作原理,指出了运动平台隔振保障技术是能否达到微加工精度的重要因素;对一级主动隔振的上平台和二级隔振,采用ANSYS软件进行了模态分析和研究,同时采用激振实验与ANSYS分析进行比较．结果表明二者具有较好的一致性,从而得出二级隔振的振动特性。通过实际的隔振效果测试,得出此二级隔振系统进一步提高了隔振效果,为三维运动平台达到高精度提供了保证。     

Association analyses identify multiple new lung cancer susceptibility loci and their interactions with smoking in the Chinese population

To find additional susceptibility loci for lung cancer, we tested promising associations from our previous genome-wide association study (GWAS) of lung cancer in the Chinese population in an extended validation sample size of 7,436 individuals with lung cancer (cases) and 7,483 controls. We found genome-wide significant (P < 5.0 × 10(-8)) evidence for three additional lung cancer susceptibility loci at 10p14 (rs1663689, close to GATA3, P = 2.84 × 10(-10)), 5q32 (rs2895680 in PPP2R2B-STK32A-DPYSL3, P = 6.60 × 10(-9)) and 20q13.2 (rs4809957 in CYP24A1, P = 1.20 × 10(-8)). We also found consistent associations for rs247008 at 5q31.1 (IL3-CSF2-P4HA2, P = 7.68 × 10(-8)) and rs9439519 at 1p36.32 (AJAP1-NPHP4, P = 3.65 × 10(-6)). Four of these loci showed evidence for interactions with smoking dose (P = 1.72 × 10(-10), P = 5.07 × 10(-3), P = 6.77 × 10(-3) and P = 4.49 × 10(-2) for rs2895680, rs4809957, rs247008 and rs9439519, respectively). These results advance our understanding of lung cancer susceptibility and highlight potential pathways that integrate genetic variants and smoking in the development of lung cancer.     

自然灾害频发下的铀尾矿库韧性程度探讨研究

核设施应急能力现代化是核安全人类命运共同体构建的关键要素,自然灾害一直在威胁着核设施(铀尾矿库)的安全运行。韧性铀尾矿库能够保证其在不可抗拒外力作用时,具有自行缓解的能力,恢复其结构稳定,达到抵御极端自然灾害的功效。铀尾矿库可视化为一个由物理空间、社会时代和信息数据构成的“系统”,全面探讨了韧性铀尾矿库内涵,初步构建了铀尾矿库韧性指标体系,并以湖南省某铀尾矿库为例,选取三级指标地质环境条件开展了韧性铀尾矿库的构建实践。     

Simple, High-Performance Fusion Rule for Censored Decisions in Wireless Sensor Networks

Data selection-based summation fusion （DSSF） was developed to overcome the shortcomings ot previously developed likelihood ratio tests based on channel statistics （LRT-CS） for the problem of fusing censored binary decisions transmitted over Nakagami fading channels in a wireless sensor network （WSN）. The LRT-CS relies on detection probabilities of the local sensors, while the detection probabilities are a priori unknown for uncooperative targets. Also, for Nakagami fading channels, the LRT-CS involves an infinite series, which is cumbersome for real-time application. In contrast, the DSSF only involves data comparisons and additions and does not require the detection probabilities of local sensors. Furthermore, the performance of DSSF is only slightly degraded in comparison with the LRT-CS when the detection probabilities of local sensors are a priori unknown. Therefore, the DSSF should be used in a WSN with limited resources.     

20世纪服装设计史概论

20世纪是服装设计从概念到体系逐渐形成和飞速发展的时代,从史学和设计艺术学的角度,以10年为单元分析20世纪各年代的服装设计风格演变、重要的设计师和代表性设计作品,并讨论影响20世纪服装进程的主要因素,构成清晰的20世纪服装设计史的框架。     

关于高师数学素质教育的设想

阐述了数学素质教育的必要,提出了在高师院校教学学科进行素质教育的设想.