黄骅坳陷孔南地区孔店期原型盆地恢复

黄骅坳陷南部的孔店组是渤海湾裂陷盆地古近纪最早的沉积地层。孔店组分布在相向倾斜的沧东断层与徐西断层构成的地堑之中。孔店期湖盆为受后期构造运动改造的"后生盆地",其边缘为构造抬升引起剥蚀形成的边缘。对这种残留湖盆边界的确定方法为测井与地震资料相结合,以测井资料为基础,地震资料为补充确定湖盆边界,进而进行区域的原型盆地恢复。     

Application of fuzzy logic for autonomous bay parking of automobiles

In this paper, we investigate the control problem of autonomous bay parking system. We choose a referenced parking lot and define a suitable parking spot based on some measurements at various places. A kinetic model is set up for the convenience of analysis and simulation. The pose of the car during the parking procedure can be determined by the initial pose, the backward speed, and the steering angle of the wheel. Then, both a fuzzy speed controller and a fuzzy steering controller are designed for the bay parking. Finally, simulation results show the effectiveness of our designed controllers.     

An artificial immune system based algorithm to solve unequal area facility layout problem

This study introduces an artificial immune system (AIS) based algorithm to solve the unequal area facility layout problem (FLP) with flexible bay structure (FBS). The proposed clonal selection algorithm (CSA) has a new encoding and a novel procedure to cope with dummy departments that are introduced to fill the empty space in the facility area. The algorithm showed consistent performance for the 25 test problem cases studied. The problems with 100 and 125 were studied with FBS first time in the literature. CSA provided four new best FBS solutions and reached to sixteen best-so-far FBS solutions. Further, the two very large size test problems were solved first time using FBS representation, and results significantly improved the previous best known solutions. The overall results state that CSA with FBS representation was successful in 95.65% of the test problems when compared with the best-so-far FBS results and 90.90% compared with the best known solutions that have not used FBS representation.     

大开间节能混凝土空心小砌块住宅体系研究

研究设计大开间节能住宅体系并建成试验楼。方案确定了承重混凝土空心砌块的规格、孔型、砌筑方法、节能保温做法、计算采暖耗热量指标等。对墙体的节能效果进行了测试。     

马鹿塘一期水电站溢流表孔工作闸门设计与创新

通过对马鹿塘一期水电站溢流表孔工作闸门平门和弧门两种方案以及启闭方式进行经济、技术比较,最终确定“平面闸门 柱塞式液压启闭机启闭机”方案。该方案思路新颖、先进合理、坝面布置简洁、节约投资、缩短工期。由于闸门及启闭机设计布置合理,整个制造、安装过程都非常顺利,运行效果也比较理想。     

平飞时内埋导弹弹射分离仿真与研究

利用应用计算流体动力学软件FLUENT的二次开发功能和RNG k-ε湍流模型建立了载机投弹流场数值模拟和弹道仿真相结合的仿真模型。运用动网格技术更新导弹与载机发生相对运动而导致的计算域变化。将整个流场的解与六自由度运动方程的解进行耦合,模拟计算了超音速条件下内埋导弹与载机分离的过程。结果表明,气动干扰对弹的纵向运动影响非常大,随着马赫数的增加,仿真结束时导弹下落距离减小,俯仰角曲线波动幅值增加。     

高空悬挑及大跨度连廊桁架安装提升技术

该工程为高层建筑,剪力墙-钢骨混凝土劲性结构,有二栋相同的塔楼、裙房桁架、塔楼间悬挑桁架及连廊桁架等组成,地下二层,地上24层,建筑高度99.85米。主要二栋塔楼分别在22-24层设施了悬挑走廊,并通过连廊桁架、悬挑走廊将二栋塔楼连接。连廊桁架通过铅芯橡胶支座、粘滞阻尼器与塔楼及悬挑连廊进行连接。根据现场实际、结构形式,选取合适的桁架安装方案,尽量减少高空作业,降低安全风险,为类似工程的安装提供了经验和参考。     

Effect of Bay Regions on the Total π-Electron Energy of Benzenoid Hydrocarbons

The three main structural factors determining the total π-electron energy (E) of a benzenoid hydrocarbon are the number of C atoms (n), number of CC bonds (m) and the Kekulé structure count (K). Nevertheless, the E-values of benzenoid hydrocarbons having the same n, m and K may considerably vary. These variations are studied and found to depend on certain structural features of the perimeter, in particular on the number of bay regions (b). A linear relation between E and b is established, such that E increases with b. Furthermore, the effect of bay regions on E increases with the increasing size of the molecule.     

Construction Projects of River Crossings and Bay Bridges in China: Achievement,Innovation and Management Practice

Bridges are built to stride over natural obstacles. They are “Key Links” in roadway network. In recent 30 years, with the reform and opening policy, many huge projects of National Expressway Network and river crossings and bay bridges have been built in mainland China, which remark great historic significance and strategic decisions. More than one hundred bridges connecting north and south of China along the Yangtze River, are making the economy and society more integrated than ever. The construction of river crossings and bay bridges is a system integration of both engineering and non-engineering achievements. Through the self-construction practices and along with the "inheritance, development and innovation", Chinese bridge engineering technology has been stepped into the world's advanced levels. Moreover, with the support of the nation's technical strength and application of modern project management method, continues efforts have been made to seek for systematic and integrated management practices, which is more fitted with the specific Chinese conditions. Many valuable experience and lessons has accumulated through the world's largest-scale bridge construction projects. In this paper, the construction achievements of long-span bridges in the Yangtze River Delta Zone have been summarized and reviewed, using methodology of engineering philosophy.     

贝氏体相变理论研究工作的主要回顾

贝氏体分上贝氏体和下贝氏体。粒状贝氏体和准贝氏体为贝氏体转变的初级阶段 ;粒状组织不属于贝氏体。各类组织均有自己的C曲线。由C曲线组成中温TTT图 ,能形成几个海湾。贝氏体预相变期发生溶质原子偏聚 ,贫溶质区即形核位置。贝氏体在溶质原子扩散影响下相变基元沿缺陷面方向切变而增宽 (厚 ) ,板条端部区相变基元平行叠加而伸长。贝氏体在晶体学上有切变性质 ,在热力学上有切变可能。