与胸墙连接的沉箱外墙及隔墙内力计算模式探讨

对于大型沉箱重力式码头,沉箱外墙及隔墙的内力计算结果与计算模式的选择有关。按现行有关规范可不考虑上部胸墙对沉箱的约束。但构造要求需符合固接处理条件。结合某沉箱重力式码头工程,在考虑胸墙约束的模式下,对沉箱外墙及隔墙的内力计算．按不同模式进行对比分析,并给出相关结论和建议。     

光学仪器测量海水透明度方法研究

基于海水透明度的光学定义,提出一种新型的海水透明度测量方法。并基于常用的光学器件及测量仪器,设计一套海水透明度的实时测量装置。介绍该测量装置的安装调节方法。该测量装置可以有效实时测量海水透明度。     

降雨条件下固定目标防护暴露区的计算仿真

干扰暴露区的计算在现代电子战中有着极其重要的作用。但在实际应用中,干扰暴露区的计算常受到干扰样式、气象条件和自然环境引起的杂波、多径效应等诸多因素的影响。为此,将降雨衰减因子引入雷达方程,仅就固定目标防护问题中的干扰暴露区计算进行仿真研究,并针对不同情况进行对比。结果表明,该方法可提高干扰暴露区计算的准确性,为降雨条件下的战场仿真提供了新的途径。     

6000t／h装船机金属结构静力学分析

新型全回转6000t／h装船机因适应船型多而倍受重视。介绍了利用有限元软件ANSYS对整机建模,并求解其应力和位移水平分析了载荷组合。     

Genetic polymorphism of T6235C mutation in 3' non-coding region of CYP1A1 and GSTM1 genes and lung cancer susceptibility in the Mongolian population

Objective To estimate the relative risk for lung cancer associated with genetic polymorphism of T6235C mutation in 3' non-coding region (Msp Ⅰ) of cytochrome P450 1A1 (CYP1A1) and glntathione S-transferase M1 (GSTM1) in the Mongolian population in Inner Mongolian Region of China. Methods Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and multiplex PCR methods were used to analyze blood samples obtained from 263 case subjects and 263 control subjects to determine their genotypes for CYP1A1 and GSTM1.Control subjects were matched with case subjects by ethnic background, age and gender. Results The frequencies of the variant CYP1A1 genotypes (CYP1A1C) and GSTM1-null in lung cancer groups were higher than those in control groups (38.4% vs. 28. 5% and 57.8% vs. 48.0%). The individuals who corried with CYP1A1C genotype had a significantly higher risk of lung cancer (OR=1.56, 95% CI=1.08 to 2.25, P=0.016) than those who carried with non-variation CYP1A1 genotype. The ones who carried with GSTM1-null genotype also had a significantly higher risk of lung cancer (OR=1.49, 95% CI=1.06 to 2.10, P=0.023) than these who carried with GSTM1-present genotype.When combination of polymorphisms of CYP1A1 and GSTM1 genotypes was analyzed, the risk of lung cancer for combination of CYP1A1C and GSTM1-null genotypes was increased significantly (OR=2.084, 95e CI=1.27 to 3.42, P=0.003). Susceptibility to lung cancer was related to smoking (OR=2.10, 95% CI=1.48 to 2.98, P=0.000). Considering smoking status, the risk of lung cancer for combination of smoking and CYP1A1C genotype was remarkably increased (OR=2.76, 950/0 CI=1.74 to 4. 37, P=0.000). It was the same case with combination of smoking and GSTM1-null genotype (OR=4. 38, 95% CI=2.35 to 8.15, P=0.000). Conclusion The polymorphisms of CYP1A1C genotype and GSTM1-null are the risk factors of lung cancer in the Mongolian population in Inner Mongolia Region of China. Smoking is also related to susceptibility to lung cancer. There may be a synergetic interaction between CYP1A1C and GSTM1-null in the elevated susceptibility of lung cancer. Smoking may have a synergetic interaction with CYP1A1C and GSTM1-null in the elevated susceptibility of lung cancer.     

交通拥挤网络效率衡量方法研究

提出了一种交通网络效率的定量衡量方法.该方法综合反映了在达到平衡状态下的交通网络中,交通流量、出行者的出行行为和旅行费用等因素对网络效率的影响,可以用来对交通网络的运行绩效进行合理的估计,且适用于任意平衡状态下的交通网络.算例表明,与其他既有方法相比,该方法能对交通网络的效率进行合理标定,并能对相关交通现象作出科学解释.     

路基边坡的深层治理措施

通过对路基边坡深层治理措施的探讨,提出排除深层地下水、土钉支护、锚固技术三种具体治理措施,并通过计算,对其设计方法进行深入论述,对路基边坡深层治理意义重大。     

重力式斜交U型高桥台模型试验研究

依据相似准则,对重力式斜交U型高桥台模型在外荷载作用下的变形、破坏进行了试验研究。总结了桥台在土压力和外荷载作用下,加固前后及采用不同加固方案的变形和破坏特征。     

平原区渗井技术应用研究

通过对深州至大名高速公路试验段的地质勘测,气候、水文资料调查和现场试验,提出渗井设置参数、结构尺寸等应用技术。其工程实践经验可应用于华北平原（滨海地区除外）的高速公路建设中,对其他等级公路和铁路建设也有借鉴作用。