The Construction of Social Darwinism in Sister Carrie     

薛晶晶  秦素华 《海外英语》2014,(15):186-187

Social Darwinism is an important theory reflected in Sister Carrie. This thesis is to interpret the characters’ fates with Social Darwinism."Survival of the fittest"is an important theme. Carrie is the winner of life and Hurtwood is the loser. Their adjustability to the environment determines their future. It is hoped to help the readers construct a better understanding on this theory.  相似文献   

汽车轮胎压力检测系统TPMS教具设计     

韩冬林 《天津成人高等学校联合学报》2014,(11):66-67

基于专用压力传感器芯片SP12和集成ASK/FSK调制发射器的rfPIC12F675微控制器,设计了用于汽车轮胎压力检测系统教学的TPMS教具。借助TPMS教具,学生不仅能够亲手搭建一个胎压检测系统,而且能够检测到实际的胎压数据和信号波形,获得了很好的教学效果。  相似文献   

多功能单机网综合管理电气控制系统研发     

刘爱云 《科技广场》2014,(1):108-111

针对现有停车场车位信息管理分散而不规范的问题,研发一种多功能单机网综合管理电气控制系统。该系统将带有压力传感器的弹性压合转换开关和可编程控制器联合使用,以电气接线控制原理实现进出车时模拟信号,通过脉冲计数器累计剩余车位,由手持式单机网信息管理设备发布和接收预约车位信息。该系统采用电气控制原理有效地提高了户外抗干扰能力,同时改善和提升现有落后停车场内部管理综合能力,使其具有一定的智能化,以较少网络流量和较低管理成本扩大各类停车场适用范围。  相似文献   

螺杆分配机头口模出口高度变化对流场的影响     

李卓  耿麒先 《人天科学研究》2013,(12):94-97

为了研究口模出口高度变化对螺杆分配机头内部流场和挤出均匀性的影响,参数化有限元分析技术贯穿于螺杆分配机头CAE仿真的全过程,采用VISUAL C＋＋和APDL语言开发出专用有限元前处理程序和特殊加载宏,调用ANSYS对螺杆分配机头流道内部流场进行三维有限元模拟与分析。分析结果表明：口模出口高度变小将增加流道内的流动阻力,显著增大狭缝流道内各部分区域过渡截面中间层节点的压力值和口模出口的挤出速度值。当口模出口高度调节较大时,有必要重新调节阻尼块以提高速度分布的均匀性。  相似文献   

PV的能量意义—压力能     

朱湘柱 《邵阳学院学报(社会科学版)》1994,(5)

本文赋予PV以压力能的物理意义,给出了严格定义、讨论了其主要性质,并例举了它的一些应用。  相似文献   

Cellular growth under hydrostatic pressure using bovine aortic EC-SMC co-cultured ePTFE vascular graft   总被引：1，自引：0，他引：1  

Sun L  Niwa K  Lin JZ  Karino T 《Journal of Zhejiang University. Science. B》2005,6(2):79-82

High blood pressure (hypertension) is implicated in the development of atherosclerosis. Blood vessels are constantly subjected to stretch due to blood pressure and changes in stretch usually instigate adaptive vascular remodeling, including abnormal growth and proliferation of vascular smooth muscle cells (VSMCs) as well as extracellular matrix (ECM). In this experiment, we used bovine aortic endothelial cells and smooth muscle cells (EC-SMC) co-cultured ePTFE vascular grafts subjected to normal atmospheric pressure (as a control), and 100 mmHg hydrostatic pressure for 7 d. The increase of cell layer thickness was observed. When measured, the cell layer thickness increased by 116.2%. The increase of collagen (Type IV) synthesis was also observed in the immunohistochemistry assay. When stained with toluidine blue, the cells showed metachromatic phenomenon.  相似文献   

英国两大政党的决策机制分析——思想库、压力集团和政党领袖对社会政策的影响     

刘波 《广东技术师范学院学报》2008,(10)

英国两大政党的决策机制主要有三大行为者--思想库、压力集团和政党领袖.社会政策的制定会受到不同的思想库、压力集团和政党领袖的影响.本文主要分析了它们在英国社会政策中所起的重要作用.  相似文献   

三块轴瓦式动压滑动轴承修复与调整     

焦环梅赵汉忠  朱百军 《黑龙江科技信息》2003,(4):54-54,

三块轴瓦滑动轴承修复过程中的使用刮削修复方法所需步骤，采用研磨修复方法，所用磨料及研磨方法，轴瓦安装，调整方法及冷状态下预留间隙。  相似文献   

Survival of the biocontrol agents Brevibacillus brevis ZJY-1 and Bacillus subtilis ZJY-116 on the spikes of barley in the field     

Zhang Xin  Zhang Bing-xin  Zhang Zhen  Shen Wei-feng  Yang Ching-hong  Yu Jing-quan  Zhao Yu-hua 《Journal of Zhejiang University. Science. B》2005,6(8):770-777

Fusarium head blight (FHB) caused byFusarium graminearum is a devastating disease that results in extensive yield losses to wheat and barley. A green fluorescent protein (GFP) expressing plasmid pRP22-GFP was constructed for monitoring the colonization of two biocontrol agents,Brevibacillus brevis ZJY-116, on the spikes of barley and their effect on suppression of FHB. Survival and colonization of theBrevibacillus brevis ZJY-1 andBacillus subtilis ZJY-116 strains on spikes of barley were observed by tracking the bacterial transformants with GFP expression. Our field study revealed that plasmid pRP22-GFP was stably maintained in the bacterial strains without selective pressure. The retrieved GFP-tagged strains showed that the bacterial population fluctuation accorded with that of the rain events. Furthermore, both biocontrol strains gave significant protection against FHB on spikes of barley in fields. The greater suppression of barley FHB disease was resulted from the treatment of barley spikes with biocontrol agents before inoculation withF. graminearum. Project supported by the National Natural Science Foundation of China (No. 30230250) and Science and Technology Committee of Zhejiang Province (No. 2003C22029), China  相似文献   

Research on reasonable winding angle of ribbons of Flat Steel Ribbon Wound Pressure Vessel   总被引：2，自引：0，他引：2  

郑传祥 《浙江大学学报(A卷英文版)》2006,7(3):445-449

INTRODUCTION Axial strength is viewed as the most important parameter in the failure analysis of a pressure vessel. As axial damage is destructive, special attention should be paid to it. The axial strength of an FSRWPV has close relationship with the winding angle α as shown in Fig.1 (Zhu et al., 1995). ASME CODE (1996-1997) stipulates that winding angle of 15°~30° should be used, with nothing said about how the range was determined. In fact, 15°~30° winding angle is not suita…  相似文献