医院超声图象管理系统的设计与实现

介绍了医院超声图象管理系统的功能和特点,并阐述了其关键技术。     

一种低压低功耗共源共栅带隙基准电压源的实现

提出了一种低压低功耗的带隙基准电压源电路,设计基于0.5μm2P3M BiCMOS Process,并使用了低压共源共栅电流镜结构减少了对电源电压的依赖,消除了精度与余度之间的矛盾,并用HL50S-S3.1S.lib库文件用HSPICE进行了仿真,其电源抑制比PSRR大约为-78.9dB。     

太湖流域水灾害应急对策研究

太湖流域是我国经济社会高度发达的地区之一,发生水灾害时往往会造成重大经济损失。对发生各类水灾害时的应急对策展开研究总结,以减轻水灾害,避免人员伤亡,保障经济社会可持续健康稳定发展,并通过分析典型案例的实际应对过程,为今后开展类似工作提供参考。     

Repeated Price Search

Consumers check few sites in online purchases. Previous research and experiments we perform demonstrate that consumers can not calculate the optimal strategy for price search. They use heuristics whose performance is better than random and less than optimal. To investigate online price search performance we survey student online textbook purchases. Students achieve good performance because they start with a good strategy and online market organization of marketplace and meta-search sites. An important factor is that algorithms at sites searched perform calculations that reduce the computational complexity of the search.     

经管类专业应用型人才培养模式研究

民办高校应用型人才培养模式是民办高校为培养应用型人才而探索形成的一种可操作性的经验与理论架构。本文简单阐述了经管类专业应用型人才培养的意义,构建了经管类专业应用型人才培养方案,主要是构建以企业为依托的合作办学模式,构建＂两平台＋N模块＋一拓展＂课程体系,构建以学生为主体的教学方法和＂双师型＂师资队伍。     

时间分解光谱技术在钢铁分析中的应用

研究了单火花光谱在不同采样时间段分析灵敏度与窗口的关系,P、S、Al、Ni、Ti、B、Mg、Sb、Pb、As、Bi、Ta、Sn应用TRS技术检出限明显降低,而C、Si、Mn、Cr、Mo、V、W、Co、Nb则不显著;合适的采样窗口能提高Sb的分析准确度,Mg则可减少背景波动带来的影响,Cu可扩大分析线性范围;采用TRS技术在诸有效元素中分析灵敏度可提高1.36～5.00倍,能更好地满足品种钢的研究开发与生产检验的需求.     

坚持以人为本的教育观 促进人的全面和谐发展

以人为本思想的实质，就是以人的全面和谐发展为本，以人的个性、独特性和创造性为本。一切教育必须以人为本，促进人的全面和谐发展，这是现代教育理念的核心内涵和基本价值取向，也是马克思主义教育理论的精髓。“以知识为本”和“以技术为本”的教育，不能培养出全面和谐发展的人。素质教育是全面和谐发展的前提，人文教育是全面和谐发展的支撑，个性发展是全面和谐发展的核心。     

数字多用表的比例功能在电阻箱检测中的应用

本文提出了检测电阻箱的一种新方法--比例法.文章除介绍其原理和方法外,还对装置的不确定度进行了分析,并对比例法检测数据和数表法直接测量的检定结果进行比对.比例法检测电阻箱的特点是对标准器和辅助设备的要求低、工作效率高并可实现半自动检定.拥有数字多用表和标准电阻的检测部门可利用本方法.     

Microstructure and yield strength of UDIMET 720LI alloyed with Co-16.9 Wt Pct Ti

We proposed a new method for developing Ni-base turbine disc alloy for application at temperatures above 700 °C by mixing a Ni-base superalloy U720LI with a two-phase alloy Co-16.9 wt pct Ti in various contents. The microstructure and phase stability of the alloys were analyzed using an optical microscope, a scanning electron microscope, energy-dispersive spectroscopy, and an X-ray diffractometer. The yield strength was studied by compression tests at temperatures ranging from 25 °C to 1200 °C. The results show that all the alloys had a dendritic structure. Ni₃Ti (η) phase was formed in the interdendritic region in the alloys with the addition of Co-16.9 wt pct Ti, and its volume fraction increased with the increase in the addition of Co-16.9 wt pct Ti. The results of exposure at 750 °C show that the addition of Co-16.9 wt pct Ti to U720LI had a great effect on suppressing the formation of σ phase due to the reduced Cr content in the γ matrix. Compared to U720LI, the alloys with the addition of Co-16.9 wt pct Ti possessed higher yield strength. The solid-solution strengthening of γ and γ′ and higher volume fraction of γ′ were assumed to cause this strength increase.