VisualFoxPro的有关新特性及应用

本文介绍了VFP环境下的若干有关国际化功能及其在教学与开发中的影响与应用.     

任意循环极限效率的P-V图证明的再讨论

给出了在Ｐ－Ｖ图上用外切卡诺循环证明任意循环极限效率的更直观、更简便的方法     

滇南坝子葡萄酒中的历史真实与文化再生产

历史其实并非是一种绝对的客观与真实,它总是会依据具体情景,融合人们的主观意图、偏好、想象、期待、愿望、信仰等而成为一种构建性真实,从而向人们展现出历史中客观性与构建性两种真实之间的密切联系。文章以云南省弥勒县南乡坝葡萄酒历史的文化生产过程为例,以滇越铁路作为超时空串联这些事件的线路媒介,以此来观察历史真实与文化再生产之间的密切联系。     

A new implementation of image-processing engine for 3D visualization and stereo video stream display

This paper presents a new implementation of a high-definition image-processing engine,which mainly targets the 3-dimensional(3D)visualization and stereo video stream display of binocular display equipment.The engine is compatible with the mainstream analog and digital stereo videos in component format and is able to receive stereo composite video broadcast signals using an integrated analog stereo video decoder.The four modules include a spatiotemporal scaling transform engine,a 2D–3D converter,an image animating engine,and a 2D scalar operating in pipeline architecture to implement the video format conversion and the stereo effect enhancement.Furthermore,the data access,hardware structure,and system-level configurations are optimized.Finally,the proposed architecture is realized by 0.18 lm CMOS technology.The application-specific integrated circuit verification results show that the engine can generate a strong feeling of 3D immersion and highdefinition image quality with minimal flicker.The chip has wide compatibility and an uppermost 1080P-processing capacity,which has approximately 3.5 million gates with about 43 mm2 die size.     

光电效应实验方法的改进

用通常的实验装置演示光电效应现象，由于所产生的光电流很弱，因而现象不明显，不易观察，我们在原有的实验装置中增加了一个放大电路，将光电流加以放大，从而改进了实验效果，本文介绍用改进后的装置，演示实验的情况。     

把握研究生阶段,成长在此时

曾有幸和施鹏老师讨论一些关于科研管理和学生培养的问题.施鹏老师是中国科学院昆明动物研究所研究员,进化和功能基因组学科组负责人.他的一些见解对研究生应该有所帮助.     

基于改进的Khatib方法的冗余机器人避障轨迹规划

讨论了人工势场方法中Khatib方法规划冗余度机器人手爪在障碍环境中的轨迹问题，基于Khatib方法提出由程序自动确定势场力比例因子的改进方法，寻找一条机器人手爪从起点到终点的安全路径。仿真结果表明，使用该方法计算时间短，参数选择设计合理。     

提高工程材料试验质量之我见

探讨了材料检验中存在的问题，提出提高工程材料试验质量的若干措施。     

PB中智能控制下拉式菜单显示的一种方法

介绍了以PowerBuilder为开发环境的应用系统中通过建立与菜单相关的数据表 ,在应用程序中根据用户设置的菜单权限 ,自动控制下拉式菜单项显示的一种方法     

Advances in tissue engineering

Tissue engineering is a newly developed specialty involved in the construction of tissues and organs either in vitro or in vivo. Tremendous progress has been achieved over the past decade in tisse construction as well as in other related areas, such as bone marrow stromal cells, embryonic stem cells and tissue progenitor cells. In our laboratory, tissues of full-thickness skin, bone, cartilage and tendon have been successfully engineered, and the engineered tissues have repaired full-thickness skin wound, cranial bone defects, articular cartilage defects and tendon defects in animals. In basic research areas, bone marrow stromal cells have been induced and transformed into osteoblasts and chondrocytes in vitro. Mouse embryo stem cell lines we established have differentiated into neuron precursor, cardiac muscle cells and epithelial cells. Genetic modifications of seed cells for promoting cell proliferation, delaying cell aging and inducing immune tolerance have also been investigated.