FI-C11-模

作为FI-扩张模和C11-模的推广,引入了FI-C11-模(如果M的任意全不变子模存在一个补是M的直和因子),讨论了该模的基本性质.例如:FI-C-模的全不变子模仍是FI-C-模;FI-C-模的任意直和仍是FI-C-模.     

Efficient spread space-time block coding scheme in multiple antenna systems

1 .INTRODUCTIONRecently ,an intense interest has focused on wire-less systems that can provide good quality and highdata rate .Space-ti me coding is an i mportant tech-nique that can i mprove system performance at fa-ding environments by obtaining diversity gains andcoding gains in multiple antenna systems .To make multiple antenna system practical ,methods that can obtain diversity gains with mod-erate complexity and provide acceptable bit errorrate ( BER) performance are investigated i…     

论德国纳粹统治时期的教育

德国纳粹统治期间,纳粹政府把精英主义、民族主义的思想全面嵌入德国的教育体系中,使其适应纳粹统治下的国家社会需要,这种教育体制全面政治化、极端化的做法全面触发了教育与政治的矛盾,也伤害到了教育本身.     

时序机串行全分解中的 NS 全分解

基于时序机全分解理论研究，文章给出了时序机串行全分解中ＮＳ型全分解的实现和优化过程     

全螺纹等强锚杆的开发及应用

全螺纹等强度锚杆是一种新型锚杆，其最主要优点是杆体不需二次加工紧固螺纹，不仅简化了生产工艺，还实现了杆体全长等强，克服了常规锚杆受拉时产生应力集中区而使杆体强度降低的缺点，另外，较大的螺距可使锚杆安装速度提高。介绍了这种锚杆的结构、性能和特点，并对其应用及支护效果作出评价，认为全螺纹等强锚杆是一种有发展前途的锚杆，是较理想的锚杆支护更新换代产品。     

Designing for Ripped-up Edge in Full Airbag

An investigation is reported in which the factors such as air discharge resistance capability, weaving ability, and anti-breakage performance are discussed. These parameters are concerned during weave designing for ripped-up edge of full air bag. Furthermore, two kinds of weave of edge in air bag, rib weave and basket weave, were chosen to analyze the performances of airbag. And the datum relative to the weave which affected the performances of air bag, such as weave form, initial point, were analyzed. In addition, accordingly technical handles are taken on the special loom.     

无穷级拟亚纯映射的充满圆

对于平面上的K-拟亚纯映射,文献[1]证明了有限正级K-拟亚纯映射必定存在充满圆序列,进一步证明了对于平面上无穷级K-拟亚纯映射也存在充满圆序列.     

从全液压式二板注塑机看机电液一体化

重点介绍了全液压式二板注塑机的结构原理和特点及机电液一体化的发展前景。     

凝析油含量的确定及应注意的问题

凝析油含量是凝析气藏评价中非常重要的参数之一.当前主要有两种方法确定凝析油含量:利用生产数据、利用全组分分析数据.前种方法需要参数少、易获得且与生产实际比较符合,但计算的凝析油含量受分离器条件影响大;后种方法计算精度高但需要数据多且与生产实际有偏差.对两种方法进行了敏感因素分析,提出了实际应用中各方法应注意的问题.根据新项目评价时间短、资料有限的情况,给出了估算凝析油含量的思路,为凝析油含量的确定提供依据.