论“科技奥运”对中国竞技体育发展的“张力”   总被引：3，自引：2，他引：1  

陆素文  蒋荣 《南京体育学院学报(社会科学版)》2009,23(5):70-72

通过对＂科技奥运＂的内涵与基本特点的分析,从体育开放、体育营销、体育组织、体育投资、城市建设、科技意识、竞技训练等方面,提出科技奥运的后效应的内容与实施建议,以促进我国体育科技更好更快的发展。  相似文献   

开发与利用体育自然资源的范式研究——江苏省盐城市沿海滩涂体育自然资源的生成     

曹晓东  蒋荣 《南京体育学院学报(社会科学版)》2009,23(4):96-98

开发与利用体育自然资源是紧密体育与社会、体育与经济、体育与自然发展关系的重要途径,体育自然资源开发与利用巳成为重要的研究领域。运用社会发展学、体育学的理论与方法,以江苏省盐城市为例,对区域性的体育自然资源的开发特质、开发策略进行研究,对促进体育自然资源开发与利用形成一定的范式,为社会体育发展、人的全面发展起着重要的作用;对丰富与拓展体育社会科学理论的研究“疆域”,具有重要的社会价值。  相似文献   

我国乡镇体育改革与发展目标探讨   总被引：7，自引：0，他引：7  

蒋荣 《体育与科学》2003,24(4):43-45

从我国乡镇体育改革与发展的依据、目标、途径等方面进行分析研究，探索乡镇体育改革与发展的基本规律，对于我国体育事业向“小康”社会的整体推进将产生积极的影响。  相似文献   

寿命周期预测的计算机方法   总被引：1，自引：0，他引：1  

王基Rong  庆承红 《预测》1991,10(6):44-46

回归曲线预测模型有很多种,大部分计算简单易行。但对于修正的指数(Modified Exponential)模型、皮尔(Pear—Reed)模型及甘培茨(Gompcrtz)模型等,在计算最佳参数值时,往往应用试探法、图解法及选点法等粗而慢的近似方法,而且,这些方法对自变量的取值常常附加一些限制条件。如果用牛顿法进行非线性最小二乘拟合,则因其局部收敛性而要求近似初值具有相当高的精度,方能使迭代收敛,这在数学上是相当困难的。针对这个同题,本文展开了深入的研究,给出了大范围收敛的迭代法用来求  相似文献   

Biocompatible chitosan/polyethylene glycol/multi-walled carbon nanotube composite scaffolds for neural tissue engineering     

Shengbo SANG  Rong CHENG  Yanyan CAO  Yayun YAN  Zhizhong SHEN  Yajing ZHAO  Yanqing HAN 《Journal of Zhejiang University. Science. B》2022,23(1):58-73

Carbon nanotube(CNT)composite materials are very attractive for use in neural tissue engineering and biosensor coatings.CNT scaffolds are excellent mimics of extracellular matrix due to their hydrophilicity,viscosity,and biocompatibility.CNTs can also impart conductivity to other insulating materials improve mechanical stability guide neuronal cell behavior and trigger axon regeneration.The performance of chitosan(CS)/polyethylene glycol(PEG)composite scaffolds could be optimized by introducing multi-walled CNTs(MWCNTs).CS/PEG/CNT composite scaffolds with CNT content of 1%,3%,and 5%(1%=0.01 g/mL)were prepared by freeze-drying.Their physical and chemical properties and biocompatibility were evaluated.Scanning electron microscopy(SEM)showed that the composite scaffolds had a highly connected porous structure.Transmission electron microscope(TEM)and Raman spectroscopy proved that the CNTs were well dispersed in the CS/PEG matrix and combined with the CS/PEG nanofiber bundles.MWCNTs enhanced the elastic modulus of the scaffold.The porosity of the scaffolds ranged from 83%to 96%.They reached a stable water swelling state within 24 h,and swelling decreased with increasing MWCNT concentration.The electrical conductivity and cell adhesion rate of the scaffolds increased with increasing MWCNT content.Immunofluorescence showed that rat pheochromocytoma(PC12)cells grown in the scaffolds had characteristics similar to nerve cells.We measured changes in the expression of nerve cell markers by quantitative real-time polymerase chain reaction(qRT-PCR),and found that PC12 cells cultured in the scaffolds expressed growth-associated protein 43(GAP43),nerve growth factor receptor(NGFR),and class IIIβ-tubulin(TUBB3)proteins.Preliminary research showed that the prepared CS/PEG/CNT scaffold has good biocompatibility and can be further applied to neural tissue engineering research.  相似文献   

Formwork lateral pressure of precast normal-concrete composite shear walls infilled with self-compacting concrete     

YAO Rong  YE Yan-hua 《重庆大学学报(英文版)》2018,17(2):39-48

Wall cracking and mold expanding due to concrete vibrations can be effectively solved through the application of precast normal-concrete composite shear walls infilled with self-compacting concrete (SCC). However, the high liquidity of SCC will induce a higher lateral pressure. Therefore, it is important to obtain a better understanding of the template lateral pressure. In this work, nine composite shear walls were experimentally investigated, focusing on the effects of two parameters, i.e., the casting rate and the section width of the formwork. The time-varying pressure was monitored during the SCC pouring. It is found that the increase of casting rate from 3.2 m/h to 10.3 m/h resulted in a higher maximum lateral pressure. The higher casting rate led to a longer time required for the lateral pressure to drop to a steady value. There was no correlation between the section width and the rate of decrease in the initial formwork pressure and stable value. Based on the test results, a formula considering the effect of casting speed for the calculation of SCC formwork pressure was established to fill the gap in the current standards and for engineering applications.  相似文献   

元极场对棘孢小单孢菌抗药突变影响的研究     

刘自Rong  袁华 《人天科学研究》1995,4(6):15-18

从棘孢小单孢菌（Ｍｉｃｒｏｍｏｎｏｓｐｏｒａ ｅｎｃｈｉｎｏｓｐｏｒａ）经元极场、紫外线处理和自然分离所获得的一些后代中，比较了它们择庆大霉素、链霉素抗药特性的变化，以一个侧面的事例，说明元极场对小单孢菌的诱变作用。  相似文献   

检验三元能量存在性的微生物学方法     

刘自Rong  任建平 《人天科学研究》1998,7(4):31-32

提出了选择适当的微生物模型作为检验三元能量存在性的一种科学测定方法。Ｇ＾＋菌试验效果明显,重复性好,可以作为一种试验模型。  相似文献   

Wax from Pyrolysis of Waste Plastics as a Potential Source of Phase Change Material for Thermal Energy Storage     

Pin Jin Ong  Zhi Xiong Jerry Heng  Zhenxiang Xing  Hnin Yu Yu Ko  Pei Wang  Hongfei Liu  Rong Ji  Xizu Wang  Beng Hoon Tan  Zibiao Li  Jian Wei Xu  Xian Jun Loh  Enyi Ye  Qiang Zhu 《天津大学学报(英文版)》2023,(3):225-234

Over the past half-century, plastic consumption has grown rapidly due to its versatility, low cost, and unrivaled functional properties. Among the diff erent implemented strategies for recycling waste plastics, pyrolysis is deemed the most economical option. Currently, the wax obtained from the pyrolysis of waste plastics is mainly used as a feedstock to manufacture chemicals and fuels or added to asphalt for pavement construction, with no other applications of wax being reported. Herein, the th...  相似文献