浅谈计算机网络会计在网络财务中所起的作用

通过与传统会计信息系统的比较，分析了计算机网络会计信息系统及网络财务所具有的特点，阐述了计算机网络会计信息系统在网络财务管理中所起的作用。     

圆柱蜗杆与蜗轮的加工测量

给出了圆柱蜗杆及蜗轮轮齿在任意半径处弦齿厚计算的精确公式，采用了圆球法测量蜗轮直径方向的两齿间距，为了计算上的需要，引进了蜗轮弦齿厚计算斜齿轮的概念和斜齿轮测量圆棒跨距法。     

我国青贮玉米的研究现状及市场前景

青贮玉米作为饲料玉米既能大幅度地提高饲料产量，同时具有较高的营养价值，在国民经济和人民生活中占有越来越重要的地位。在借鉴欧美等发达国家对青贮玉米研究成果的基础上，分析了我国发展青贮玉米的优势和潜力，提出了青贮玉米的育种策略、育种目标和主要用于家畜饲养业的有效利用途径。     

Reach Envelope of Human Extremities

Significant attention in recent years has been given to obtain a better understanding of human joint ranges, measurement, and functionality, especially in conjunction with commands issued by the central nervous system. While researchers have studied motor commands needed to drive a limb to follow a path trajectory, various computer algorithms have been reported that provide adequate analysis of limb modeling and motion. This paper uses a rigorous mathematical formulation to model human limbs, understand their reach envelope, delineate barriers therein where a trajectory becomes difficult to control, and help visualize these barriers. Workspaces of a typical forearm with 9 degrees of freedom, a typical finger modeled as a 4-degree-of-freedom system, and a lower extremity with 4 degrees of freedom are discussed. The results show that using the proposed formulation, joint limits play an important role in distinguishing the barriers.