罗氏沼虾血清及肌肉提取液凝集活性的比较研究     

戴聪杰  陈寅山  谢进金  吴文林 《泉州师范学院学报》2005,23(2):68-72

用12种天然或经酶修饰的动物及人红细胞测定罗氏沼虾的血清和肌肉提取液的凝集能力，同时进行糖抑制、热稳定性、pH及Ca^2＋影响试验．结果显示，罗氏沼虾血清对鹤鹑红细胞的凝集效价比肌肉提取的高，且糖抑制、热稳定性、pH适应范围及对Ca^2＋的依赖性都存在明显差别．表明罗氏沼虾血清和肌肉提取液所含凝集素的类型不同．  相似文献   

电铲电机测试台的设计     

彭军 《岳阳职业技术学院学报》2006,21(3):55-57

电铲电机检修后的测试，一直是现场工程技术员感到棘手的问题。为解决这一突出矛盾，设计测试台可事半功倍地实现电铲电机的电气和机械性能测试，提高电机的检测效率和准确性。  相似文献   

Phonological Awareness Skills in Young Boys with Duchenne Muscular Dystrophy     

Phoebe Waring  Gail Woodyatt 《International Journal of Disability, Development & Education》2011,58(2):155-168

Substantial research has detailed the reading deficits experienced by children with Duchenne muscular dystrophy (DMD). Although phonological awareness (PA) is vital in reading development, little is known about PA in the DMD population. This pilot study describes the PA abilities of a group of five young children with DMD, comparing the results with those of a group of children with spinal muscular atrophy and with those of a group of typically developing children. The Preschool and Primary Inventory of Phonological Awareness was used to assess the PA skills of the participants. Results indicated that the children with DMD performed significantly poorer than the typically developing group on tests of Syllable Segmentation, Rhyme Awareness, Alliteration Awareness and Phoneme Isolation and significantly poorer than the spinal muscular atrophy group on Rhyme Awareness. The findings of this pilot study indicate that children with DMD may have an increased risk of having PA difficulties, thus requiring early PA training.  相似文献   

弹塑性断裂的内参量热力学分析——Ⅰ.线弹性裂纹体的裂纹扩展     

朱锡雄 《宁波大学学报(教育科学版)》1989,(1)

本文在内参量热力学的理论框架内详细讨论了线弹性裂纹体的裂纹扩展问题。对线弹性断裂力学中所涉及到的各种能量关系作了统一的整理,其中包括Irwin的弹性能释放率——裂纹扩展力,Griffith的脆性断裂准则,以及Irwin-Kies的柔度公式和Paris的位移公式。本文以中心裂纹体为例,详细计算了裂纹扩展的稳定性,并区分恒载荷和恒位移两种情况,对材料断裂韧性测试中所遇到的失稳扩展,稳定扩展以及进发现象提供了理论说明。  相似文献   

The celestial mechanics of Newton     

Dipankar Bhattacharya 《Resonance》2006,11(12):35-44

Newton’s law of universal gravitation laid the physical foundation of celestial mechanics. This article reviews the steps towards the law of gravitation, and highlights some applications to celestial mechanics found in Newton’sPrincipia. His research interests cover all types of cosmic explosions and their remnants.  相似文献   

后牛顿力学及其应用     

胡旒冕  张世杰 《蒙自师范高等专科学校学报》1989,(2)

本文综述了牛顿重力理论的近代发展,即后牛顿力学或度规理论,並简述了它的现代应用成果。  相似文献   

有多余坐标完整系统的Hojman守恒量     

梅凤翔 《商丘师范学院学报》2004,20(5):1-5

研究有多余坐标完整系统的Hojman守恒量．给出系统Lie对称性与Noether对称性，Lie对称性与形式不变性间的关系．得到特殊Lie对称性、Noether对称性以及形式不变性导致的Hojman守恒量．举例说明结果的应用．  相似文献   

Experimental Study of Structure Shock Vibration in Soil Caused by Explosion of Conventional Weapons     

FENG Jinji  XIE Qingliang  ZHAO Dayong 《天津大学学报(英文版)》2006,12(Z1)

When hitting underground structures directly or exploding in rock-soil media near underground structures, the conventional weapons with large charge weight will make underground structures be subjected to strong shock vibration and cause personal casualty and damage of precision electronic equipments. The shock vibration has become one of the cardinal killing means of weapons. However, the existing methods of predicting structure shock vibration are limited evidently. In this paper the coupling coefficient of acceleration in clayey soil is obtained firstly. Subsequently based on repeated experiments of chemical explosion, after dimension analysis and by using method of multivariate stepwise regression, the calculation formulae of shock vibration acceleration for the underground structure are obtained finally. The formulae consider top and side explosion respectively, taking into account the effects of penetration depth, charge weight, distance to explosion center, rock-soil media, size of structure and buried depth. They are easy to use with high practicability and degree of confidence, and can provide credible evidence for prediction of shock vibration and vibration isolating design of underground structure.  相似文献   

20世纪物理学对人类社会的深刻影响     

李先荣 《黔南民族师范学院学报》2005,25(6):60-63

相对论和量子力学奠定了20世纪近代物理学的发展基础，相继取得了人们在原子能、航天、激光、超导、信息、纳米等一系列现代高新技术的广泛应用，对人类社会产生了深刻的影响；近代物理学发展的特点是向“微观世界”和“宇观空间”进军，向“新事物”和“复杂性”进军，形成了从基础性研究到促进高新技术应用的新发展模式；物理学发展的基本观点是“彻底唯物”和“批判性”的，物理学理论体现了“简单、对称、和谐”的美。  相似文献   

液固两相槽道流中柱状粒子取向的数值研究   总被引：1，自引：0，他引：1  

周强  林建忠  王叶龙 《科技通报》2004,20(5):375-380

对柱状粒子在槽道流场内的运动进行数值模拟，然后用统计方法得出大量柱状粒子的取向分布；给出了粒子长径比、粒子密度和流场区域对粒子取向分布的影响．计算结果表明，柱状粒子长径比的变化对粒子取向分布的影响不明显，粒子密度对粒子取向分布有一定影响，而流场区域所造成的流场横向速度梯度对粒子取向分布有重要影响．随着流场横向速度梯度增大，粒子取向趋势愈加明显，且当流场横向速度梯度增大到一定程度时，粒子取向都趋向于流动方向．文中部分结果与相关实验进行了比较，两者定性吻合较好。  相似文献