谈计算麦克劳林公式的间接法

介绍了计算两类复合函数麦克劳林公式的间接法,得到了一般性结论,旨在使学生深入掌握麦克劳林公式的基本理论和计算方法。     

二重积分变量替换定理的不同证法

针对二重积分变量替换公式,不同于一般《数学分析》教材中所用的直观但不太严格的证明方法,给出了两种相对简单且又严格的证明方法.它们分别是逐次换元法和Green公式法.前一种方法的主要思想是化一般正则变换为两个简单正则变换的复合,后一种方法巧妙的利用了Green公式.     

鲢鱼粒调味工艺的正交试验优化研究

以鲢鱼为原料,采用正交试验设计,以感官评分值为评价指标,对鲢鱼粒的调味工艺和配方进行优化。调味优化配方为：砂糖6％,食盐3％,辣椒2％,料酒3％,味精l％,五香粉2％。调味优化工艺为：调味时间4h,调味温度15％,配料添加量17g／10％鱼肉。     

Does LDL-C Estimation Using Anandaraja’s Formula Give a Better Agreement with Direct LDL-C Estimation than the Friedewald’s Formula?

Estimation of low density lipoprotein cholesterol (LDL-C) is crucial in management of coronary artery disease patients. Though a number of homogenous assays are available for estimation of LDL-C, use of calculated LDL-C by Friedewald’s formula (FF) is common in Indian laboratories for logistic reasons. Recently Anandaraja and colleagues have derived a new formula for calculating LDL-C. This formula needs to be evaluated before it is extensively applied in diagnosis. We measured LDL-C by homogenous method (D-LDL-C) in 515 fasting samples. Friedewald’s and Anandaraja’s formulas were used for calculation of LDL-C (F-LDL-C and A-LDL-C, respectively). The mean LDL-C levels were 123.3 ± 53.2, 112.4 ± 50.2 and 109.2 ± 49.8 mg/dl for D-LDL-C, F-LDL-C and A-LDL-C, respectively. There was a statistically significant difference between the results (P > 0.001) obtained by calculation formulas compared to the measured LDL-C. There was underestimation of LDL-C by 10.8 and 14 mg/dl by Friedewald’s and Anandaraja’s formulas respectively. The Pearson’s correlation between F-LDL-C and D-LDL-C was 0.931 and that between A-LDL-C and D-LDL-C was 0.930. Bland–Altman graphs showed a definite agreement between mean and differences of the calculation formulas and direct LDL-C with 95% of values lying with in ±2 SD limits. The mean percentage difference (calculated as {(Calculated LDL-C)-(D-LDL-C)}/D-LDL-C × 100) for F-LDL-C was maximum (−11.6%) at HDL-C ≥ 60 mg/dl and TG levels of 200–300 mg/dl (−10.4%) compared to D-LDL-C. A-LDL-C results gave highest mean percentage difference at total cholesterol concentrations <100 mg/dl (−37.3%) and HDL-C < 40 mg/dl (−17.1%), respectively. The results of our study showed that FF is better in agreement with D-LDL-C than Anandaraja’s formula for estimation of LDL-C by calculation though both lead to its underestimation.     

完善格式条款法律规制的探讨

我国《合同法》有关格式条款的规定在解释上存在不协调和矛盾性,应充分体现对相对人利益的特别保护,同时应注意保证《合同法》的系统性、科学性和逻辑性。     

基于Word文档的数学论文正文格式编排

通过Word文档样式的制作以及公式编辑器使用过程中遇到问题的处理,以实现迅速准确地完成数学论文的格式编排工作.     

用向量法证明海伦公式

从数与形的角度对向量进行再认识,通过应用向量方法证明海伦公式,更进一步阐明了向量是沟通代数与几何的天然桥梁,是一个重要的数学模型,它能为解决问题提供新的方法和视角。     

苯酚-甲醛-淀粉模塑料(PF2A2)的研制

介绍了苯酚-甲醛-淀粉模塑料(PF2A2)原料配方和制备工艺,讨论了乌洛托品/苯酚-甲醛-淀粉树脂和木粉/碳酸钙投料比对其试样强度和固化速度的影响,分析了其性能和经济优势.     

Остроградский-Gauss公式的应用研讨

首先由Green公式引入O-G公式,然后利用O-G公式和第一型曲面积分与第二型曲面积分的关系,将空间区域的体积表为曲面的积分;再分别利用直角坐标与极坐标,解得了一般封闭曲面所围立体的体积;最后利用O-G公式计算曲面积分,得到了锥面与球面所围立体表面的外侧及一般封闭曲面所围立体表面的上侧。     

生产要素价值论、“三位一体公式”与劳动价值论和我国按要素分配问题

生产要素价值论正在替代效用价值论在我国与劳动价值论相衡。在国内一些重要的权威的报章,电视台,杂志和出版物上都可听到这种声音。要素价值论是百年前“三位一体的公式”的翻版。马克思对三位一体公式有深刻的科学的批判。重温这一批判对认识要价值论是有益的。我国今天的按要素分配,其理论依据与要素价值论理论完全不同,但也含有某些“异化”因素。解决异化问题,只有利用包含异化因素在内的一切力量,尽快提高生产力水平。