摘要：光催化废水产氢技术是缓解日益严峻的能源和环境危机的有效方法.然而,由于载流子复合率较高、太阳光利用率较低,目前光催化活性仍然难以满足工业发展的需要.基于以上问题,本文设计了具有全谱太阳光响应的黑磷敏化的金/氮化碳(BP/Au/CN)异质结光催化剂,该三元异质结可以在实现降解双酚A的同时,将水分解为氢气,其光催化产氢活性可达到195.8μmol h^(−1)g^(−1).此外,在紫外-可见光照射下,BP/Au/CN的光催化产氢活性可以达到1400.8μmol h^(−1)g^(−1),是CN或BP/CN样品的近70倍,Au/CN异质结的2倍.光催化活性的提高表明异质结中三种元素具有良好的协同作用.本文将一系列实验表征与理论计算相结合,对BP/Au/CN的光催化机理进行了系统研究.结果表明,黑磷的全谱太阳光吸收能力、金的电子传输介质作用以及三种材料匹配的功函数是其光催化活性提高的关键因素.此外,通过金和黑磷的欧姆接触以及Au/CN杂化体系中肖特基异质结的构筑,实现了电子从黑磷到金,再到氮化碳的单向转移,从而提高了载流子的传输性能.

摘要：为山崩预防的一个最佳的排水隧道地点决心方法被建议在排水隧道建设解决存在问题。在中国的排水隧道系统的当前的应用程序被考察，排水隧道的函数作为集水和拦截被分类。数字模拟被进行。结果证明集水和拦截隧道在单层模型的模拟有功能的变化，它在更低的层显示出渗透状况的减小。集水的功能能在深斜坡被观察，当拦截的功能在地下水来源附近被观察时。由使用，斜坡安全因素和分泌物水为邻近的排水隧道的构造质量作为判断在固定节点和节流动作为最佳的排水隧道地点，和毛孔水压力的目的总计，排水隧道的设计原则被介绍。K103 山崩作为一个例子被说明决定最佳的排水隧道地点。测量排水隧道效率被评估并且与那相比从数字分析基于地下水数据。结果验证现在的数字学习。

摘要：Taizhou Yangtze River Highway Bridge is the first three-pylon two-span suspension bridge in china. The main girder adopts flat steamline steel closed box girder which has well wind-resistant capability and is technically mature besides beautiful appearance. Straight web plates of the steel box girder in longitudinal direction are proposed in order to ensure the integrity of the steel box girder, and to keep the stress of the steel box girder continuous in the middle pylon, as well as to reduce the gradient of the middle pylon columns. The cross section of the box girder has one box with three cells. Solid-web diaphragm plate with good integrity and high torsional stiffness is adopted. The lifting lugs are utilized in the anchors of suspender cable. In this paper, selection of the cross section of the steel box girder, the general structure design, local structure design and main structure calculation results of Taizhou Yangtze River Bridge are introduced emphatically.

摘要：At the middle pylon of a three-pylon two-span suspension bridge, the effect of unbalanced loads on the adjacent spans may result in a series of technical bottlenecks in design, such as stability and anti-slippage between saddles and main cables. This article presents the researches conducted on structure selection and behavior characteristics of middle pylon, interaction mechanism between main cables and saddles and their anti-slippage safety performance, elastic and plastic stability analysis and safety assessment of steel middle pylon, and fatigue design load and method for steel pylon of Taizhou Bridge. According to the research results, a longitudinal inverted Y shape steel middle pylon is used in design, effectively solving many technical difficulties, and this type of pylon has become a suitable middle pylon structural form for many three-pylon two-span suspension bridges.

摘要：提出了一种综合方法能够计算来自变速箱稳定的动态响应和噪声辐射。该方法在考虑时变啮合刚度、齿轮误差和轴承箱体的情况下建立圆柱齿轮传动系统的动力学模型,通过求解数学模型获得动态轴承力的数据。此外,以轴承负载力的数据为激励,数值模拟计算出变速箱的振动和噪声辐射,随着节点动态响应时间的变化,获得了变速箱的噪声频谱和共振频率范围。最后,计算了变速箱面板的共振的频率范围。基于变速箱面板声学贡献分析和振型的结论,对两个齿轮箱的刚度进行了改善。对比分析齿轮箱噪声辐射,确认该方法能有效降低噪声的产生,对变速箱的设计提供了有用的理论指导。

摘要：Taizhou Bridge is the first kilometer level three-pylon two-span suspension bridge in the world and the structural complexity has significant effects on the seismic performance of the bridge. Shaking table test of Taizhou Bridge is arranged to investigate the effects of non-uniform ground motion input, collision between main and side spans and optimal seismic structural system. It's very important and difficult to design and manufacture the scaled down model of Taizhou Bridge used during the shaking table test. The key point is that the girder and pylons are very hard to be manufactured if the similarity ratio is strictly followed. Based on the finite element method (FEM) analysis, a simplified scaled down model is designed and the bending stiffness of the girder and pylon are strictly simulated, and the torsion stiffness and axial stiffness are not strictly simulated. The inner forces and displacements of critical sections, points of simplified model and theoretical model are compared by FEM analysis, and it's found out that the difference between the seismic responses is relatively small. So, the simplified model can be used to conduct the shaking table test by the FEM verification.