Graphs with maximum degree 6 are acyclically 11-colorable

An acyclic k-coloring of a graph G is a proper vertex coloring of G, which uses at most k colors, such that the graph induced by the union of every two color classes is a forest. In this note, we prove that every graph with maximum degree six is acyclically 11-colorable, thus improving the main result of Yadav et al. (2009) [11].     

中专数学试题库试后统计与分析程序设计

《试后统计与分析》具有题分录入，客观题自动阅卷，计算每人得分，输出成绩单，输出考分分布情况及判断是否符合近似正态分布，进行试题与试卷质量分析；建立成绩档案库等功能。     

Optimization of preparation conditions of carboxymethyl potato starch through orthogonal experimental design

To optimize the preparation conditions of carboxymethyl potato starch (CMPS), the effects of relevant factors on viscosity (η) of 2% CMPS aqueous solution and degree of substitution (DS) were investigated. These condition parameters included etherification temperature, alkalization and etherification time, water content in the mixed solvent, ratio of liquid volume to starch mass, molar ratio of sodium hydroxide to monochloroacetic acid, and molar ratio of monochloroacetic acid to anhydroglucose unit. After individual parameter influencing η and DS was researched one by one, an orthogonal experiment of L₁₈ (2 × 3⁷) was designed to identify the main factors affecting them. In light of range analysis, the comparative importance of factors impacting η and DS was obtained, separately. Results of variance analysis showed that the most effective factor to control DS was etherification temperature, whereas the influences of all factors on η were not significant. Meanwhile, η and DS of the optimized final product were found to be 12,000 mPa.s and 0.68, respectively. In addition, the structure of CMPS was characterized by Fourier transform infrared (FTIR) spectrophotometer. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

Dynamic Characteristics Analysis of Two‐DOF Oscillatory Actuator and Experimental Verification of Prototype

Recently, linear oscillatory actuators have been used in a wide range of applications. In particular, small linear oscillatory actuators are expected to be used in haptic devices by being extended to provide multi‐degree‐of‐freedom motion with arbitrary acceleration. In this paper, we propose a compact two‐DOF oscillatory actuator that can move in various directions on a plane. The static and dynamic characteristics of the actuator are determined by the 3D finite element method. The effectiveness of this method is shown through a comparison of the measured results with the experimental results from a prototype. © 2013 Wiley Periodicals, Inc. Electr Eng Jpn, 186(1): 58–65, 2014; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.22312     

烟煤粘结指数测定中搅拌方法的改进

根据GB/T 5447-1997烟煤粘结指数测定方法,结合粘结指数测定中的实际操作经验,分析了煤的混匀程度对粘结指数测定准确性的影响,同时针对现有的搅拌方法进行了改进,并取得了很好的效果。     

南水北调三潼宝工程征地移民系统和谐性研究

和谐强调的是事物、事情协调地生存和发展的状态.工程移民系统的和谐分析反映了工程移民系统的整体状况,有利于促进移民工作的开展.现以和谐理论的分析为起点,从社会系统、经济系统、环境系统和资源系统4个方面建立了评价移民系统的综合指标体系,建立移民系统和谐度的计算模型,并以南水北调三潼宝工程的移民工作状况为例,计算分析了三潼宝工程移民系统的和谐度.     

判别分析的一种新方法

将数理统计与物元分析相结合，给出了用统计方法确定经典域，节域，建立关联函数，求解关联度以及进行判别分析的方法，为统计判别分析了提供了一种新的方法。     

Kinetics and mechanism of radical polymerization of methylmethacrylate using p-acetylbenzylidene triphenylarsonium ylide (p-ABTAY) as an initiator

Solution polymerization of methylmethacrylate (MMA) initiated by p-acetylbenzylidene triphenylarsonium ylide in dioxane was carried out at 60±0.2 °C up to 10 hrs. in a polymerization tube under a nitrogen atmosphere. The values of the initiator and the monomer exponent were computed as 0.46 and 1.03, respectively. The overall activation energy and kp²/k_t were calculated as 53 KJ/mole and 1.19 × 10⁻² L/mol·s, respectively for the polymerization.     

糖厂降低吨糖耗蔗量的挖潜措施

首先论证了影响吨糖成本的关键环节，是吨糖耗蔗量。然后通过有关计算公式，算出大量数据的基础上分析了影响吨糖耗蔗的基本因素，最后提出了降低吨糖耗蔗量的参考措施     

六角柱网三向斜交结构简化三维分析

本文对六角柱网三向斜交结构提出了简化三维分析方法。通过引入虚拟柱的概念，把结构分解成不同方向的平面结构进行分析。结构的空间共同工作由虚拟柱的肾向位移协调和刚性楼板的水平位移协调的假定考虑，并反应结构空间受力的主要特性。根据文中模型。进行了算例分析和比较。结果表明，本文方法极大地缩减了自由度数目。