Research on adaptive anti-rollover control of kiloton bridge transporting and laying vehicles

The SPMT construction method is a new rapid construction technology of large urban overpass with unblocked traffic,and unstability of SPMT construction method equipment cannot be accurately described due to the concrete beam size,irregular shape and complex transport conditions,which is called kiloton bridge transporting and laying vehicle.The anti-rollover performance of SPMT suspension system is studied,and vehicle side slip angle and load transfer rate(LTR) are regarded as the evaluation indexes.An active suspension adaptive anti-rollover control model of SPMT,in which roll stability affected by the structural parameters and control parameters,is built based on fuzzy PID,and the effectiveness of the control method is verified through real vehicle test.

On the Construction of Deepening Anti - corruption Mechanism

It needs the foundation of system and the guarantee of organizational system for anti-corruption,but it is more necessary to build and form an effective anti-corruption mechanism,so that the anti-corruption can be really put into practice. Anti-corruption mechanism refers to a organic operation system of the interaction,interconnection and constraint between the constituent elements( parts) and elements of national anti-corruption,and as a system,anti-corruption mechanism should have the characteristics of system aticness,comprehensiveness,transparency,legalization,public participation,scientific dynam ic,and internationalism. The construction of deepening anti-corruption mechanism is the need for reconstructing the ruling legitimacy of the party and the governm ent. Adhering to the principle of treating both root causes and symptoms is necessary in the construction of anti-corruption m echanism,com bating and punishing corruption is an important part of anti-corruption,and the prevention and control of corruption is the basic project of anti-corruption. Therefore,the construction of prevention and control mechanism in the anti-corruption mechanism has a more far-reaching significance.

Comparative analysis of cast-in-place post-tensioned and steel-concrete composite bridge bent caps

The complexity of the IH-635 Managed Lanes Project, located in Dallas County, Texas, posed several technical and constructive challenges, leading to the adoption of solutions different from the traditional. Two alternative solutions for the pier cap on one of the bridge crossings over IH-35E in the IH-635 project were analyzed in this case study, a cast-in-place post-tensioned concrete cap and an innovative prefabricated steel-concrete com- posite cap. The approach was to use an estimation of direct costs for material and labor and consideration of con- struction time schedules. A supplementary numerical modeling confirmed that both alternatives behave elasti- cally under imposed loads. The direct cost of material and labor for the two alternatives were close. However, the composite alternative required 13 days less construction time, resulting in substantial cost savings from traffic closing in the very busy traffic corridor. Traffic closing costs were substantially higher than the direct costs, especially for the post-tensioned cap. The quantification of the benefits allows more confidence in the utilization of the composites caps, leading to faster completion of bridge projects and substantial economic savings.

Improving the Heat Resistance ofβ-1,4 Glucanase by Introducing Disulfide Bonds

Each possible pair of residues inβ-1,4 glucanase for disulfide formation was assessed using online websites,and four pairs L28C-S256C,Q41C-P278C,S122C-N163C and A184C-A215C were selected.Accordingly,four recombinant plasmids pET28a(+)EccslH28,pET28a(+)EccslH41,pET28a(+)EccslH122 and pET28a(+)EccslH184 were prepared and transformed into E.coli to express the recombinant enzymes.Then analysis on enzymatic properties showed that T50 of the recombinant enzymes was increased from 10 min for EccslHt2 to 90 min for EccslH28 and 40 min for EccslH41 at 70℃,while their optimum pH value and pH stability were not affected,which proved that the introduction of disulfide bond improved the thermal stability ofβ-1,4 glucanase.

Challenges and Opportunities for China＇s Agricultural and Rural Development in the 12th Five-year Plan Period

Despite the great progress of rural socioeconomic development in the 11 th Five-year Plan period （2006-2010）, China＇s agriculture and countryside are still.lacing the challenges of a crude development pattern, backward rural development and cities＇ weak driving effect on the countryside. In the 12th Five-year Plan period （20I 1-2015）, China should transform the way agriculture grows and operates; promote rural socioeconomic development; improve urban planning and its functions, institutional innovation, and urban/rural integration to lay a solid foundation for building an all-round well- off society.

气象观测场在汽车试验场中的应用研究

汽车试验场作为汽车开展道路测试的重要场所,用于验证汽车产品的品质以及可靠性。除了场地道路外,气象条件作为汽车道路测试的重要一环,在《GB/T12534-1990汽车道路试验方法通则》中也有明确要求,如:试验时应是无雨无雾天气,相对湿度小于95%,气温0-40℃,风速不大于3m/s。同时气象条件也作为试验场道路管控的重要依据,实时风速、雨量、能见度等信息为场地管理者发布限速、限行、封场等通知提供必要参考依据,直接影响道路测试安全管控的及时性。因此,文章从气象观测场的建设、气象服务、异常天气道路管控等方面开展气象观测场在汽车试验场中的应用研究。

生物样本库建设管理现状与建议

系统梳理国外生物样本库建设模式、国内生物样本库管理建设情况,探讨疾病预防控制系统内建立公共卫生生物样本库的机遇、优势和挑战,为今后指导疾病预防控制系统生物样本库建设管理的实际工作提出政策建议和解决途径。

A technical review on persistent scatterer interferometry

This article focuses on reviewing the technologies of persistent scatterer interferometry （PSI）, which has been often used to monitor the deformation of Earth surface. Three critical steps in the implementation of PSI were introduced, i.e., （1） detection of persistent scatterer （PS）, （2） construction of PS network, and （3） PSI modeling and solution. Finally, the main problems and outlooks on the PSI technique are discussed and given.

沥青路面下面层施工空隙率对疲劳性能的研究

目前关于空隙率与疲劳性能的研究很多,不过大部份都是处于配合比设计阶段,研究不同空隙率对疲劳性能的影响。而配合比设计后,通过施工压实导致的不同空隙率对疲劳性能的研究很少。为了分析施工空隙率与疲劳性能的影响,该文开展基于下面层施工空隙率对疲劳性能的研究。结果表明:施工质量的变化导致的空隙率对疲劳性能影响符合客观规律,可提高压实度来增强下面层的抗疲劳性能。

远程开放英语本科商务英语方向专业课程教学探索

本文结合作者教学实践,通过对远程开放英语本科商务英语方向专业课程教材及开放教育特点和教学方法的分析,提出了在“导学—自学—助学”过程中分阶段使用反思教学法(reflectiveteaching)、建构性教学法(constructiveteaching)、交际沟通教学法(communicativeteaching)的教学思路。