基坑承压水降水对周边建筑物沉降的影响

本文依据曹妃甸翻车机房试降水试验项目,研究在基坑试降水试验期间承压水对周边已建翻车机房、铁路等建筑物沉降的影响,分析原因并找出解决方法,为基坑正式降水期间对周边建筑物沉降控制和监测提出方案,确保施工顺利进行。     

Analytical Solutions to the Fundamental Frequency of Arbitrary Laminated Plates under Various Boundary Conditions

In recent years, as the composite laminated plates are widely used in engineering practice such as aerospace, marine and building engineering, the vibration problem of the composite laminated plates is...     

基于LabVIEW的空气流量传感器性能检测系统

本文简述了传统空气流量传感器检测系统的弊端,提出了一种基于LabVIEW软件的空气流量传感器测试系统的设计方案。本系统运用LabVIEW灵活性和多输入多输出的特点,能够很好地实现对测试数据实时绘图,方便操作。同时,给出了详细的硬件和软件设计方案。     

片状Fe-Si-Al-Cr磁粉复合材料的传导噪声抑制特性研究

通过压延工艺制备了含有片状Fe-Si-Al-Cr合金磁粉的电磁噪声抑制片,采用微带线法表征了样品的传导噪声抑制特性,并研究了磁粉填充浓度和样品厚度对噪声抑制特性的影响。结果表明:材料的传导噪声抑制特性随着磁粉填充浓度或样品厚度的增加而提高,其中填充浓度为85%(质量分数)厚度为1mm的样品在1.86~6 GHz范围内功率损耗比高达90%以上,显示出优异的噪声抑制性能。     

Factors Affecting Knowledge,Perceptions, and Attitudes Regarding North Carolina Coastal Reserve Management

During the period May 25–October 28, 2007, we collected data in face-to-face interviews on four sites in the North Carolina Research Reserve system. We subsequently conducted analyses on the effects of education, income, length of visitation, and frequency of visitation on visitor knowledge, perceptions, and attitudes regarding management. Visitors to the sites were well-educated, listed incomes above the state median, and were racially homogeneous. At the overall level, the majority (63%) knew who owned the sites, but only 43% correctly identified the managing agency. The majority also believed that overall conditions at the sites were stable, although those that had been visiting longer perceived conditions as deteriorating. Education was positively correlated with knowledge of ownership and management, and with support for additional rules and enforcement. Neither income, nor frequency of visitation showed any correlation with any of the dependent variables at the overall level. Some site-specific findings differed from the overall findings and varied from site to site. These differences were addressed individually.     

论海事行政处罚自由裁量的限制

随着社会发展的专业化、技术化以及社会关系的复杂化,行政权的强化和扩张已经成为发展的趋势,这就必然要求行政自由裁量的扩张,但是这也必然导致行政处罚可能和法治精神的背离。根据授权,海事管理机构具有的海事行政处罚是一种较严厉的制裁性行政行为,其自由裁量权若被滥用必将侵犯行政相对人的权利,影响我国的航运事业的发展。本文对海事行政处罚自由裁量权存在的合理性、如何限制行政处罚自由裁量权的行使等方面加以探讨,以期有利于海事管理机构依法行政,切实保障行政相对人的合法权益,使航运更安全、使海洋更清洁,更好地为繁荣航运经济保驾护航。     

Study of factors influencing dose distribution of brachytherapy in cervical cancer

Objective To study the factors which influence the dose distribution of brachytherapy in cervical cancer. Methods Ninety-five patients with cervical cancer Ⅱ - Ⅲ b received fundamental radiation therapy including brachytherapy in our department from Aug. 2004 to Nov. 2005. The deviation of isodose curve of brachytherapy was based on A-B reference system, and the deviation of dose was defined by measuring in a practical standard body model. Results The factors influencing isodose offset significantly were parametrial infiltrating degree, and anatomy factor of cervical cancer and operating skill. The degree of isodose offset could not be lowered with the increased frequency of brachytherapy. Conclusion Making simulation in cervical brachythecapy is necessary not only for the identification of the deviation of isodose curve but also for adjusting the dose distribution and revising the plan of radiotherapy.     

G109线T型梁桥病害成因及加固对策

该文针对钢筋混凝土简支T型梁桥在运营15～20a后出现的各类病害进行分析,并提出加固对策。     

基于容量修正的安时积分SOC估算方法研究

针对传统安时积分SOC估算法将电池容量视为定值而带来的误差,提出了带容量修正的安时积分法,它通过开路电压法确定电池组SOC初始值,再由电池组充放电试验得到不同倍率、库伦效率、温度等对电池容量的修正因子。仿真与试验结果表明,经改进的安时积分法可有效消除各种误差,估算结果精度较高,可用于SOC的实时估算或作为评价其它SOC估算策略的基准。     

集群系统的负载平衡算法研究

负载平衡是集群计算机系统的核心问题。通过对多处理机系统中负载平衡算法的分析研究，根据集群系统的特点，提出了新的负载平衡算法，并对算法的设计思想和实现作了阐述。