动态系统Stiff微分方程的稳定性分析

动态系统 Stiff 微分方程常在科学、工程中出现。本文利用模型方程对动态系统差分微分方程的 Lagrange 和 Hermite 插值问题的稳定性分别进行分析,给出稳定分析的方法、条件和一些重要结果,计算出稳定域的边界轨迹等。     

现代审美神性的建构与科学精神的培养

审美神性早已有之,而且相当重要;就是在现代社会中,审美神性的建构也是非常重要的。审美神性的建构需要培养现代科学精神。通过科学精神的培养来建构现代审美神性具体表现为三个方面:培养批判精神,培养求实精神,培养逻辑精神。     

钎焊金刚石砂轮磨削大理石的力的变化特征

通过测量和分析高频感应钎焊金刚石砂轮磨削大理石过程中的磨削力，对砂轮所受的法向力和切向力进行了研究。从单颗金刚石最大切削厚度的角度。分析了磨削深度、进给速度和砂轮线速度时磨削力的影响。     

论挡土桩的合理间距

本文指出作为基坑围护构件的挡土桩加大间距的经济意义，论述加大桩距的理论依据、可行性。及应注意的问题。     

Optimization of low-abundance protein extraction and abundant protein removal from defatted soybean meal

The aim of this study was to optimize the conditions for the extraction of low-abundance proteins (LAPs) and the removal of abundant proteins (APs; β-conglycinin and glycinin) from soybean meal. Single factor and orthogonal experiments were designed to determine the effects of four factors (isopropanol concentration, total extraction time, ultrasonic power, and ultrasonic time) on protein concentration in isopropanol extracts. Proteins in the isopropanol supernatant and the cold acetone precipitate of isopropanol were identified by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF-MS). The results showed that the optimal conditions were 50% isopropanol, ultrasonic pretreatment for 15 min at 350 W, and a total extraction time of 1 h. Under these conditions, the protein concentration in the isopropanol extracts reached 0.8081 g/L. Many LAPs were detected, including β-amylase, soybean agglutinin, soybean trypsin inhibitor, fumarylacetoacetase-like, phospholipase D alpha 1-like, oleosin, and even some unknown soybean proteins. The soybean APs (β-conglycinin and glycinin) were not found. The method may be useful for discovering new soybean proteins and extracting enough LAPs of soybean to allow further studies of their physiological effects on animals without the influence of APs.     

大学课程教育中先进的教学手段与教学思想研究

大学课程教育与中小学课程教育有着重大的区别，特别是教师的授课行为与学生听课过程，然而，现在的事实却是大学的教学方式与中小学并没有大的差异，这种延续千百年的教学模式对新形势下的大学生是否适用是一个值得研究的问题，特别是随着计算机及信息技术的飞速发展，如何进行高校课程教学的改革成为大学课程教育的一个重要研究课题。     

高职基础课程改革的探讨

围绕高职教育办学目标，分析了目前高职教育的薄弱环节，设想在基础课中开设一门综合性科学素质课程——《科学技术基础与应用》，提出了开设本课程的具体实施方案。     

在英语教学中培养学生的创造性和批判性思维

创造性和批判性思维对于科技的发展,经济的增长,社会的进步起着重要的作用。本文探讨了两种思维的定义,并就如何在英语教学中培养学生的创造性和批判性思维提出了自己的观点。     

An exchange rate determination model for central banks’ interventions in financial markets

We establish an exchange rate determination model for central banks’ interventions in financial markets. The model shows that central banks can adjust exchange rate by several policy instruments and that different instruments may have different effects on exchange rate determination. It specifies potential policy instruments for central banks as well as their policy effects. Based on these effects, feasible matches of policy instruments in contingent intervention are put forth. Project supported by the National Natural Science Foundation of China (No. 79870074)     

"长三角"地区社区教育的特点探析

分析"长三角"地区社区教育6个方面的特点,认为这一地区发展社区教育的经济、文化基础较为扎实,应以成人教育为重点,更多关注弱势群体,重视城镇化进程中的农村社区教育.同时,应坚持以科研为先导,为社区教育行政决策提供理论支持,并将社区教育列入区域整体发展规划.