发展液化气船的技术要点与展望

本文从实用出发，对LNG船液货舱的三种舱型和三种LPG船型等技术要点分别作了较为详细的分析，并展望了液化气船的发展趋向。     

前列腺特异性抗原值增高患者前列腺液中白细胞状态的研究

目的研究获取的前列腺特异性抗原(PSA)值增高患者的前列腺液中的白细胞状态。方法112例PSA值增高的患者在行经直肠前列腺穿刺活检前获取前列腺液,并行前列腺液中的白细胞计数。用相关分析和t检验分析白细胞与患者年龄、PSA、前列腺体积等的关系。结果所有患者的前列腺液中白细胞密度加大(平均5.29×106/mL),白细胞总数增高(平均1.58×106)。前列腺液的体积和白细胞总数与前列腺体积呈显著性相关,非前列腺癌患者较前列腺癌患者的前列腺体积和白细胞总数显著增高。结论非前列腺癌患者的PSA值增高可能与前列腺液中的白细胞增高有关。     

双浮体波浪能装置的振荡和能量转换特性研究（英文）

In this study, we investigated the hydrodynamic and energy conversion performance of a double-float wave energy converter(WEC) based on the linear theory of water waves. The generator power take-off(PTO) system is modeled as a combination of a linear viscous damping and a linear spring. Using the frequency domain method, the optimal damping coefficient of the generator PTO system is derived to achieve the optimal conversion efficiency(capture width ratio).Based on the potential flow theory and the higher-order boundary element method(HOBEM), we constructed a threedimensional model of double-float WEC to study its hydrodynamic performance and response in the time domain. Only the heave motion of the two-body system is considered and a virtual function is introduced to decouple the motions of the floats. The energy conversion character of the double-float WEC is also evaluated. The investigation is carried out over a wide range of incident wave frequency. By analyzing the effects of the incident wave frequency, we derive the PTO's damping coefficient for the double-float WEC's capture width ratio and the relationships between the capture width ratio and the natural frequencies of the lower and upper floats. In addition, it is capable to modify the natural frequencies of the two floats by changing the stiffness coefficients of the PTO and mooring systems. We found that the natural frequencies of the device can directly influence the peak frequency of the capture width, which may provide an important reference for the design of WECs.     

高速公路桥梁穿越煤矿采空区基础处理措施

结合成都—自贡—泸州高速公路施工情况,探讨高速公路桥梁穿越煤矿采空区基础处理措施,对于指导实际工作有一定的意义.     

新型拱桥施工合龙段的设置

文昌桥是一座无腹式变截面钢筋混凝土板拱桥 ,根据其设计要求和施工方法 ,提出施工合龙段的设置原则 :在恒载作用下 ,对称设置于成桥状态的反弯点处。理论分析与试验结果表明 ,该方法是合理的     

秦岭终南山特长公路隧道通风站设计

主要介绍了秦岭终南山特长公路隧道通风系统的各部分组成、设计思路，以及通风系统设计中所考虑的主要问题．并就通风系统结构复杂的地下风机站作了重点介绍，主要论述风机房尺寸的拟定、机房的内部组成、设计的基本思路．公路长大隧道的通风系统设计目前在我国尚不成熟，通过本文的介绍旨在达到扩展通风系统的设计思路的目的．