平板式筏基计算方法的改进和简化

平板式筏基为无梁体系 ,传力简捷 ,整体刚度好 ,施工速度快 ,是框架结构常用的基础形式。对等代框架法和经验系数法进行分析比较后 ,提出了适用于平板式筏基的等代梁弯矩系数法 ,并结合新规范对板的冲切计算、受剪计算、弯矩及配筋计算推导了较实用的简化公式和条件式 ,编制了计算表     

南京地区土体热物理性质测试与分析

通过对南京地区大量黏土和粉质黏土样品的比热容值和导热值的测试，分析土体热物理性质与其含水量、孔隙比的相关关系。对影响土体比热容值、导热值的因素作了详细分析，提出根据土体含水量计算土体比热容和根据含水量、孔隙比值计算土体热导率的经验计算公式。     

全方位施工钻孔中矿体真厚度计算公式探讨

长期以来,我国各类找矿勘探书籍中关于钻孔中矿体真厚度的计算公式表达式为:M=L/N(sinαsinβcosγ±cosαcosβ),2013年有梁瑞等在《矿产勘查》发文对此公式进行了探讨,提出了改进公式:M=L/N|(sinαsinβcosγ±cosαcosβ)|。但此改进后的公式仍存有较大的局限性。因此,进一步探讨钻孔中矿体真厚度计算公式,为目前地质勘查在估算资源储量中提供正确的矿体真厚度参数、避免资源储量估算结果的失误有重要的意义。文章提出了全方位钻孔施工条件下矿体真厚度计算的公式:M=L/N|(cosαcosβ-sinαsinβcosγ)|。     

Effects of storage conditions on lipid oxidation in infant formulas based on several protein sources

The time course of several lipid oxidation parameters in infant formulas was the main focus of this study. Infant formulas based on different protein sources (milk protein, isolated soy protein, and hydrolyzed milk protein) were stored at different temperatures (32 and 55°C) in sealed containers in air for 1 yr. Levels of thiobarbituric acid-reactive substances and 7-ketocholesterol, and losses of essential fatty acids and tocopherols were measured to monitor lipid oxidation. Tocopherol losses and 7-ketocholesterol concentrations were better lipid oxidation parameters than the others. Their concentration and losses depended on type of infant formula, storage temperature, and time.     

边界元法中奇性系数张量的统一解析计算公式

文章给出使用常数、线性和二次边界元对弹性力学平面问题分析时奇性系数张量的统一解析计算公式,并附有算例     

GaAs MMIC用无源元件的模型

制作了不同结构参数的GaAs MMIC无源元件,包括矩形螺旋电感、MIM电容和薄膜电阻,建立了无源元件的等效电路模型库,采用多项式公式表征无源元件的模型参数和性能参数,便于电路设计的应用.并提取得到MIM电容的单位面积电容值,约为195pF/mm2,NiCr薄膜电阻的方块电阻约为16.1Ω/□.分析结构参数对螺旋电感性能的影响可知,减小线圈面积相关的寄生损耗有助于获得高品质的电感.     

单值数据转化为Vague值数据的定义和转化公式

提出了单值数据转化为Vague值数据的定义和准则,提出了两个单值数据向Vague值数据的转化公式。例题表明不同公式有不同的特征。     

Method for numerical integration of rapidly oscillating functions in diffraction theory

The quadrature of general, highly oscillatory integrals is a relatively complicated computational problem that occurs in a wide range of practical applications, e.g. in physics, chemistry, and image analysis. It is often necessary to use a high number of nodal points with classical quadrature formulas in order to achieve a required accuracy of numerical integration of rapidly oscillating functions. However, an increase in integration points leads to a larger computational time. Our work describes and analyses a method for numerical integration of rapidly oscillating functions, which enables to obtain the required accuracy with a smaller number of nodal points than classical integration rules and with a relatively simple integration formula. The proposed method is generally suitable for integration of rapidly oscillating functions in various applications. The method is demonstrated in examples of calculation of the diffraction integral in optics, where the integrand is often a rapidly oscillatory function. The results can be readily adapted to similar problems from other fields. Copyright © 2009 John Wiley & Sons, Ltd.     

近10年早期肠内外营养对急性胰腺炎预后的Meta分析

目的:分析2004—2014年早期肠内外营养对急性胰腺炎预后的影响及并发症。方法:应用计算机检索2004年1月—2014年1月国内外文献数据库,对急性胰腺炎进行肠内外营养支持治疗的预后对比。结果:对于急性胰腺炎,早期肠内营养较肠外营养可降低其病死率、减少感染率、缩短住院时间、减少并发症的发生。结论:对于急性胰腺炎患者,可尽早进行早期肠内营养进行营养支持治疗。     

特殊营养物质在肠内营养中的重点应用

综述了谷氨酰胺、精氨酸、ω-3脂肪酸、膳食纤维等特殊营养物质在肠内营养中的应用。这些特殊营养物质对特定疾病的治疗有较为明显的效果,旨在为临床应用以及肠内营养制剂的研制开发等提供参考。