Comprehending regional characteristics and influencing factors of China’s inbound tourism economy is im-portant to make......

Taoer River Basin, which is located in the west of Northeast China, is an agropastoral ecotone. In recent years, the hyd......

China’s economic restructuring shouldbe more focused on industrial divisionsfrom a macro perspective, saying adjust-men......

China has to raise agricultural productivity in its limited and shrinking farmland to guarantee food security for its hu......

Reduction of drag torque is one of important potentials to improve transmission efficiency.Existing mathematical model o......

China’s steel industry shows slowing trend China’s steel industry,which in the boom of the past few years has become t......

The optical absorption of 4H-,6H-and 15R-SiC single crystals has been measured at room temperature. The band gaps were c......

Reduction of drag torque in disengaged wet clutch is one of important potentials for vehicle transmission improvement. T......

Sovereign debt problems exist not only in European countries. Most advanced countries are troubled with a debt burden. T......

【Abstract】light irradiation and release of cosmic particles will cause orbit expansion of stars and planets and cosmic......

东太湖是长江中下游地区典型的草型湖泊,是太湖的浅水湖湾和主要出水通道,也是上海市、浙江省杭嘉湖城镇供水取水口的主要来水水源......

红梁井由于开采的历史原因造成北翼地面火区蔓延，直接影响矿井的安全生产。通过井下探查火区及时注水、注浆阻隔火区向矿井蔓延，地面......

针对皮革收缩温度测定仪的温度控制系统的控制效果不甚理想的问题，提出一种参数模糊自整定PID控制方法，该方法集中了模糊控制和常规P......

结合混凝土结构中裂缝的发生和发展,从承载力和收缩等方面分析了混凝土结构中裂缝产生的原因,并结合抗放结合的原则,从材料、设计......

Authorware是一款将文字、图形、图像、声音、动画，视频等各种多媒体数据汇集一起的图标导向式多媒体编辑制作软件。Authorware灵活......

晶体管的缩小过程中涉及到三个问题。第一是为什么要把晶体管的尺寸缩小,以及是按照怎样的比例缩小的,这个问题是缩小有什么好处。......

研究了聚丙烯纤维对不同强度等级混凝土的影响,通过试验表明,聚丙烯纤维能够抑制混凝土的干缩,分析了其作用机理,并介绍了工程应用......

在假设逆极限空间X=lim←{Xα,παβ,Λ}是λ-仿紧、投射πα为伪开映射的条件下,正规性、收缩性及次收缩性均可为其极限空间保持......

现浇混凝土的裂缝是建筑工程中的一个重要问题,在混凝土施工性能改善的同时,控制裂缝的难度增大.文中分析了现浇梁板结构产生裂缝......

曲率的非负性是刻画流形的一个关键条件。证明了具有拼挤Weyl曲率的闭shrinking solitons上Ricci曲率一定是非负的。如果进一步假......

对混凝土收缩、徐变分别概述了它们的定义、产生机理及其影响因素,并提出应当对混凝土结构在长期荷载作用下产生的挠度变形进行精......

目的探讨左炔诺孕酮宫内缓释系统的临床疗效。方法选择我院64例妇科疾病患者,将其放置LNG-IUS,观察放置后1、3、6、12个月的改善状......

SMO(序贯最小优化算法)算法是目前解决支持向量机训练问题的一种十分有效的方法,但是当面对大样本数据时,SMO训练速度比较慢。考虑......