Roll angle of autocollimator measurement method based on hollow cube corner reflector

In this paper, a method of measuring roll angle with hollow cube corner reflector (HCCR) is proposed. Firstly, the space coordinate vector relationship between the mirror and the autocollimator is established by using the Euler rotation relationship, and the structure of the HCCR is designed. Secondly, through the actual measurement of the HCCR reflector''s angle sensitivity, the specific formula of roll angle measurement is obtained. The experimental results show that the method can be used to measure the roll angle, and the maximum root mean square (RMS) error is 15" in the range of 350", and the repeatability of the experiment is better than 2.7". On the basis of retaining the traditional autocollimator, the plane mirror is replaced with HCCR, which realizes the measurement of the roll angle of the autocollimator. This method does not change the internal structure of the autocollimator system, and there is no process error caused by special processing technology, so as to retain the autocollimator''s own long measurement distance, high measurement accuracy, high system stability, and large range of measurement performance, and it can also be used in industrial production.     

基于模糊数学感官和响应面法研制豆渣麻花及品质分析

本文以豆渣粉和中筋粉为主要原料,辅以泡打粉、植物油、蔗糖、全蛋液进行豆渣麻花的研制.在单因素实验的基础上,利用模糊数学感官评价法和响应面优化法对影响豆渣麻花感官品质的蔗糖添加量、植物油添加量、豆渣粉添加量进行优化,并对最后成品的营养成分、理化指标和微生物指标进行相关测定.豆渣麻花的最佳工艺配方为:豆渣粉添加量14％(豆...     

水泥中粉煤灰激发剂的研究

利用HY-ZFS型高分子助磨剂母液和盐类激发剂,对临沂地区的粉煤灰进行激发试验。研究结果表明,HY-ZFS型高分子助磨剂母液对粉煤灰水泥强度的提高具有决定性作用,单独少量掺加盐类激发剂CaCl2和Na2SO4对粉煤灰水泥强度的提高效果很弱,将HY-ZFS母液与各种盐类激发剂复合,对粉煤灰水泥才有激发作用。     

脑出血后肺组织炎症损伤情况的研究

目的研究脑出血后肺组织炎症损伤的发病机制。方法用病理学常规HE染色法观察脑出血组和对照组肺标本的出血、渗出和炎症细胞浸润改变情况,在光镜下对白细胞、巨噬细胞进行记数。结果与对照组比较,脑出血组肺组织存在明显渗出、出血及大量白细胞、巨噬细胞浸润,炎症细胞记数有显著意义P<0.05。结论脑出血可以通过引发炎症反应导致急性肺损伤;炎症反应在3~5d时最明显。     

改性矿渣MTC堵水技术的应用

普通水泥颗粒表面静电荷具有很大的表面相互作用,再加上失水增粘的影响,形成的颗粒有效尺寸远大于颗粒桥堵所需尺寸,影响注入深度.矿渣细度比标准普通水泥小,在水化前相互之间无作用力,能够进入到较小的孔道中,是一种比较好的挤水泥材料.根据紧密堆积理论,在矿渣MTC浆中加入微细材料PZW等进行改性.对改性矿渣MTC浆静胶凝强度、抗压强度、渗透率、失水、流变性、触交性及注入能力评价及现场应用表明,改性矿渣MTC浆具有良好的流变性,注替压力容易控制,静止时易形成胶凝状态,可快速封堵水层;性能易调节,初终凝时间可根据设计和施工要求任意调整;过渡时间短,强度发展快,可避免水蚀;渗透率小,堵水效果好;堵水工艺简单,成本低,成功率高.     

浅谈分校区家属院校园网的管理和维护

网络的发展使校园网进入家庭已成必然,家庭网络维护成了校园网管理中的一项重要工作。网络不通的现象时有发生,对一些常见的网络问题能很快定位故障点,是排除故障的关键,也是校园网管理者的一项重要任务。本文对其他高校的校园网维护具有一定的借鉴价值。     

粉煤灰混凝土配比设计的计算机系统

简要介绍了粉煤灰混凝土配合比设计计算机系统的结构与内容，设计方法与技术条件的确定，以及用混凝土公司数据对系统计算结果所作的验证。     

静重式力标准机"逆程"现象的影响及消除

本文用详实的数据说明了静重式力标准机的"逆程"现象及对传感器检测结果的影响,介绍了电液伺服技术解决"逆程"现象的几个关键技术问题,肯定了电液伺服技术是消除"逆程"现象的一个行之有效的途径.     

基于声发射定位算法的故障检测技术研究

高精度的声发射源定位能够帮助工程人员快速定位故障或异常发生的位置,可用于对大型设备进行结构可靠性监测和检测。为了提高声发射源定位的精度,提出一种融合了Geiger定位方法、同伦算法及牛顿梯度方法的源定位算法。采用Geiger迭代定位方法实现对源定位信息的迭代更新,并将更新信息的求解转变为对不适定问题的求解。同伦算法和牛顿梯度方法的结合,避免了常规不适定问题求解方法中耗时的矩阵求逆,优化了求解过程。实验结果表明,所提方法优于常规定位算法,可实现对声发射源位置信息的高精度求解。     

In-situ hydrothermal crystallization Mg(OH)2 films on magnesium alloy AZ91 and their corrosion resistance properties

Mg(OH)₂ films have been fabricated on magnesium alloy AZ91 substrates by an in-situ hydrothermal method. AZ91 alloy substrates act as both the source of Mg²⁺ ion and the support for the Mg(OH)₂ film in synthetic process. The effect of pH value and hydrothermal treatment time on the morphologies and corrosion resisting properties of Mg(OH)₂ film is studied. The obtained Mg(OH)₂ films are uniform and compact. The adhesion between the films and the substrate is strong due to the in-situ growth process, which enhances their potential for practical applications. Potentiodynamic polarization measurements showed that the Mg(OH)₂ films obtained at pH 10, 3 h exhibits the highest increase in corrosion potential at −0.7097 V and lowest i_corr, which suggests that it is the best effective film in improving the corrosion resistance of AZ91in all obtained films.