Esterification characteristics and crosslinking reaction parameters between wood and polycarboxylic acid

The results showed that: 1.After the materials lost water, pyrolytic reaction of wood samples and α cellulose consisted of two stages but the reaction of Klason lignin was in only one stage.

结果表明：1.失去水分后的试样木粉、α－纤维素热解反应分两阶段进行，克拉松木素热解反应只有一个阶段。

The results of range and variance analysis reveal that the formation of complexes with Cu is still the major reaction in wood although the competitions among ACQ constituents for reaction sites exist. 4.

极差和方差分析表明，虽然ACQ不同组分会竞争在处理材中的反应场所，但木材成分与Cu之间的反应仍然是处理材中的主要反应。

THE INTERMEDIATE OF CROSSLINKING REACTION BETWEEN WOOD AND POLYCARBOXYLIC ACIDI. Space Effect and Chemical Structure of Polycarboxylic Acid

多元羧酸与木材交联作用的反应中间体I.多元羧酸的空间效应和化学结构

Effect of Temperature on Crosslinking Reaction between Wood and Polycarboxylic Acid

温度对多元羧酸与木材交联反应的影响

Study of microfibril angles in reaction wood

应力木纤丝角的研究

Effects of different angles on the growth stress, wood density and wood shrinkage of the reaction wood

不同倾斜角度对应力木生长应力、木材密度和干缩性质的影响

The concentration and chemical characteristices are variable according to different cell wall regions, reaction wood presence and cell types.

根据细胞壁不同层、不同的反应木及不同细胞类型，木素的数量、浓度及化学特性都不同。

Analytical prediction of the armature reaction and winding inductances of permanent magnet brushless DC motor with concentrated coils

集中绕组永磁无刷直流电机电枢反应及绕组电感的解析计算

The allocation scheme of reaction wheels is analyzed, and the model of frictional characteristics of reaction wheel is built.

分析了反作用飞轮的配置方案，建立了飞轮的摩擦特性数学模型。

The macro-kinetics of methane-steam catalytic reforming reaction with wheel catalysts of original sizes was investigated in an internal recycling gradientless reactor ( Type KD-1) under 3.04 × 106 Pa absolute pressure.

在3.04×10~6Pa压力下使用KD-1型内循环式无梯度反应器研究了原粒度七筋车轮形催化剂上甲烷水蒸汽催化转化反应的宏观动力学。

A Study on the Macro-Kinetics of Methane-Steam Reforming Reaction with Wheel Catalysts

车轮形催化剂上甲烷水蒸汽转化反应宏观动力学的研究

Reaction wheel ( RW) is one of the most important inertial execution parts of satellite attitude control system, it is widely used as the main execution part in three-axis stabilization satellite that with long life, high precision, multifunctional which be launched in recent few years.

反作用飞轮是卫星姿态控制系统中最重要的惯性执行部件之一，近几年发射的长寿命、高精度、多功能三轴稳定卫星，几乎毫不例外地利用反作用飞轮作为主要执行部件。

Reaction wheel is one of the disturbance sources for satellite structures, which leads to vibration of the satellite structures and decrease the work capability and pointing precision of the sensitive equipments.

反作用轮高速旋转是卫星结构的扰动源之一，受反作用轮扰动的影响，航天器整体结构会产生微小振动从而影响高精度敏感设备的指向精度和工作性能。

To study the problems of decoupling and eliminating precession for zero-momentum reaction wheel system, a new method to eliminate precession was put forward.

针对零动量轮卫星控制系统解耦和进动抑制问题，提出了一种新的进动抑制方案。

Simulation results show that the controller proposed in this paper has excellent control precise and robustness, and can suppress reaction wheel low-speed friction effect effectively.

仿真结果表明该控制器控制精度高，能有效抑制飞轮低速摩擦等对姿态的扰动。

As a kind of high accuracy executive machine, reaction wheel has been extensively applied to the attitude control system ( ACS) of satellites.

作为一种高精度的执行机构，反作用飞轮已广泛应用于卫星姿态控制系统中。

Aimed at the initial attitude capture, a combined control algorithm for the magnetorquer and reaction wheel has been adopted.

针对小卫星入轨阶段的姿态捕获控制，提出了一种使用磁力矩器和反作用飞轮进行联合控制的算法。

Research and simulation experiments based on nonlinear control method of the satellite attitude large-angle maneuver based on reaction wheel are studied in this paper.

本文对基于反作用飞轮的卫星大角度姿态机动控制系统的非线性方法进行了研究和实验仿真。

Design and Application of Reaction Wheel Elec-Simulator Device

反作用飞轮电模拟器设计与应用

Reaction wheel is one of the main disturbance sources for the attitude control system accuracy of spacecraft.

反作用轮是影响航天器姿态控制系统精度的主要扰动源之一。