黄山头大曲酒独特醇甜型风格成因初探

从黄山头酒业所处地理位置的自然生态环境、有机原料基地的建设、生产工艺特点、民俗习惯、现代生物技术的应用与传统工艺的改进、酒体微量成分与人体健康等六个方面探讨了黄山头大曲酒的＂绵、甜、爽、净、香＂风格特征的成因。决定黄山头大曲酒醇甜型风格的六大主要因素为自然生态环境、原辅料、微生物区系、糖化发酵剂、酿酒工艺、储存设备与环境。     

Progress in Thermal Contact Resistance

The developments of aeronautics and astronautics require engines of higher quality. The temperature distribution in combustion engine is highly influenced by the thermal conduct resistance. To predict the temperature field of the hot-end assemblies of combustion engine, the thermal contact resistance must be considered. The object of the study is to propose a model of high application including in conditions of high temperature and high pressure. Up to date, many models and empirical or semi-empirical corre...     

高负载环境下基于Linux系统的防火墙软中断性能改善研究

当网络负载增大到一定程度后,基于Linux防火墙的数据转发性能开始下降。最常见的瓶颈是系统软中断在单一CPU上耗用达到100％。本文对这一问题进行了分析并提出了一种易于实现且性能改善明显的解决方案。     

试论涪陵榨菜软实力的提升

涪陵榨菜属地理标志商标,是涪陵的重要软实力之一。认识涪陵榨菜的软实力,加大营销力度,提升涪陵榨菜的国际知名度,有利于推动涪陵榨菜健康与快速发展。文章从软实力的含义、涪陵榨菜硬实力和固有软实力的体现、提升涪陵榨菜软实力的途径与措施进行了论述。     

An experimental study on self-output-control characteristics of micro downwind rotor with coning soft blades

In this short paper,we have treated the aerodynamic performance of micro downwind rotor with coning soft blades experimentally.The test wind rotor has the tip diameter of 1.5 m and three two-dimensional NACA0018 blades of 0.15 m chord whose material is light,soft and pliable foam plastic for perfect safety.From the wind tunnel test,it is realized that the performance is manageable by the coning angle of the rotor blade.In the present case,an improvement of the performance in lower wind speeds is achieved by...     

Finite element simulations of static and sliding contact between a human fingertip and textured surfaces

This paper presents a mechanics study of the variations with position and time of stresses within the dermis and epidermis of a human fingertip when it is loaded and slid over textured surfaces. Its purpose is to examine how fingerprints interact with surface texture to cause stress variations in tune with the sensitivities of Meissner and Pacinian corpuscles through which humans in part interpret tactile sensations. A two-dimensional multilayer elastic finite element model of a fingertip has been created for this purpose. Results show that fingertip’s epidermal ridges have little effect on stress distribution within the fingertip in static loading but significantly increase stress oscillations during sliding over a textured surface. Oscillation frequencies from the sliding simulations are in ranges that should stimulate a fingertip’s Meissner and Pacinian corpuscle nerve endings.     

基于有限元的桩基础内力分析及设计

通过工程实例,利用结构通用软件Midas建立桩承台有限元模型进行受力及变形计算,对结果进行统计分析得到一系列结论,进一步指导工程设计,明确指出在一些情况下需要对规范得到的结果进行修正,并提出了具体的修正方法。     

桩土界面接触单元的研究与应用

为解决桥梁群桩基础在上部荷载作用下桩土界面的接触问题,根据接触非线性理论和桩土不同物理力学特性的特点,首先推导反映桩土界面滑移的刚度矩阵,然后提出处理滑移变形的均匀化方法。采用ABAQUS软件的用户子程序接口,编制桩土界面接触单元,可以描述接触在循环荷载作用下的塑性应变增长和残余相对位移,在荷载水平分量作用下的界面脱开现象,以及接触刚度的非线性增长与衰减特性。这样,桩土界面的一些重要特性可以通过有限元的方法得以体现。