高温差地区大体积混凝土温度监测与裂缝控制技术

结合内蒙古自治区集丰高速公路黑沟特大桥承台大体积混凝土施工，从原材料选配、配合比设计、混凝土施工工艺以及混凝土养护等方面介绍高温差地区大体积混凝土裂缝的控制方法及温控措施。     

A new marine propulsion system

A new marine propulsion system is proposed . A small liquid sodium cooled reactor acts as prime mover; alkali-metal thermal-to-electric conversion (AMTEC) cells are employed to convert the heat energy to electricity; superconducting magneto-hydrodynamic thruster combined with spray-water thruster works as propulsion. The configuration and characteristics of this system are described. Such a nuclear-powered propulsion system is not only free of noise, but also has high reliability and efficiency. It would be a preferable propulsion system for ships in the future。     

邓小平理论教学中应该把握好的一个问题——与第一代领导人对社会主义建设道路探索的关系

我国第一代领导人对社会主义建设道路的探索所积累的宝贵思想财富和积极理论成果,成为邓小平理论的重要思想源泉,而这一探索中所犯的错误及其教训又成为邓小平理论形成的条件和重要契机。在教学中,一方面要做好邓小平理论与毛泽东社会主义建设理论的衔接,另一方面也要正确处理好邓小平理论与毛泽东晚年错误的关系。     

斜拉钢管混凝土拱组合结构及其受力特性浅析

介绍斜拉与钢管混凝土拱组合结构的由来及实例,分析增设斜拉索后的钢管混凝土拱肋受力性能的改变。     

平原区公路路基软基处理方法探讨

在公路施工中，受复杂地理条件的限制，会遇到各种各样的坑塘或软基，结合实际，通过比选找出了二灰桩和低剂量灰土戴帽方案作为平原区路基处理方案之一。该方案具有工艺简单、操作方便、成本低、效率高的特点，具有一定的实用价值。     

Prediction of Stabilization of Ship in Random Wave

In this paper we show thc method of energy in part with which we can get the model of random wave,and predict theroll motion of unstabilized ship and stabilized ship using the wave model.The control parameters of fin stabilizer are determinedaccording to the performance index. The simulation of the system is also made in this paper. The comparison of the simulationwith real ship indicates that the method can be used in the prediction of roll motion of a stabilized ship in random wave.     

船艇波浪中自航试验研究

对一艘船艇作了波浪中自航试验研究，得到了规则波中自航因子变化曲线，用直接功率法作了失速预报，并用谱分析法预报了该艇的纵摇、升沉及螺旋桨出水概率。本文的重要结论：船艇在波浪中的自航因子在简化处理时，可以认为相当于静水中的自航因子。     

On the realization of nonlinear wave profiles using the Banach fixed-point theorem: Stokes wave in a finite depth

A new mathematical formulation for the realization of nonlinear wave profiles and its nonlinear solution procedure, based on the Banach fixed-point theorem, is proposed. To apply the formulation, a nonlinear equation for the Stokes wave in a finite depth was derived, and some numerical solutions are given. A numerical study showed that the proposed iteration method, based on linear progressive wave potential only, enabled us to realize the Stokes nonlinear wave profiles in a finite depth. The nonlinear strategy of iteration has a very fast convergence rate, i.e., only about 6–10 iterations are required to obtain a numerically converged solution.     

小半径曲线地段喂梁作业的难点及解决方法

从分析最小喂梁长度与曲线半径及双梁式架桥机后机臂长度等参数之间的关系出发 ,通过采取拨道和预偏装等措施局部扩大曲线半径 ,满足喂梁作业的要求。     

提高港区380V电压等级的可行性研究

目前 ,我国以门机为码头前沿主要装卸机械的码头 ,配电电压一般为 380V ,而门机上的电动机安装容量又较大 ,由于配电电压低 ,电流大 ,有时出现烧毁电动机的现象 ;在码头前沿需要设置相当数量的 10 / 0 .4kV变电所 ,占用了许多要地 ;变压器和开关设备的利用率低 ,造成浪费。将港区 380V电压提高到 6 6 0V ,技术上可行 ,经济上合理 ,具有重要的现实意义