木糖醇的合成、应用及市场前景

介绍了木糖醇主要的两种合成方法：化学法和微生物法；对其在食品、医药等行业中的应用进行了阐述，并论述了木糖醇的市场前景。     

基于微课的翻转课堂教学实践

本文以C语言程序设计课程中的递归程序教学为例,论述了基于微课开展翻转课堂教学的教学设计及实施方法。     

如何提高士官学员学习“计算机应用”的兴趣

"计算机应用"课程是士官学校的一门基础课程,计算机操作技能对于学员来说是一项最基本的技能。在教学过程中,通过精心设计教学过程的导入、丰富课堂的教学方法、提高教学语言的技巧、分层设计教学目标、精心组织技能竞赛等多种方法来激发和提高学员学习"计算机应用"课程的兴趣。     

太阳能溴化锂吸收式制冷系统吸收特性的研究

太阳能溴化锂吸收式制冷系统的吸收器采用传热、传质分离装置,利用预冷器预先冷却和喷淋吸收的方法完成对传热、传质的分离。通过建立吸收器的计算模型,分析冷冻水出口温度、冷却水进口温度、热水温度、喷淋温度、喷淋密度等因素对传热、传质的影响。利用传热、传质分离方法,使系统的吸收特性得到强化,从而使系统获得较高的性能系数。     

Hydrodynamics of gas-solid flow around immersed tubes in bubbling fluidized beds

A numerical study was conducted based on the gas-solid two-fluid model using the body-fitted coordinate system to analyze the behavior of particles and bubbles flow in bubbling fluidized beds without and with immersed tubes. The kinetic theory of granular flow was implemented in the model. The images of simulated instantaneous particle concentration and velocity gave the process of the formation, coalescence and eruption of bubbles. The effects of the tube pitch and superficial gas velocity on the fluidization in a bubbling fluidized bed were investigated. Calculated bubble frequencies without and with immersed tubes were in agreement with previous experimental and simulation findings. The wavelet multi-resolution analysis was used to analyze the simulated data of instantaneous particle concentration. From the random-like particle concentration fluctuations, the fluctuating components due to particle flow and bubble motion can be extracted based on the wavelet multi-resolution analysis over a time-frequency plane.     

烧结法微晶玻璃装饰板材的力学性能研究

本文研究了烧结法微晶玻璃装饰板材的密度、抗折强度等力学性能,讨论了成分、结构对密度、抗折强度的影响.     

在线浊度快速分析的方法研究及应用

应用散射光在线测量浊度的原理,基于间歇法测量方式,解决了现场浊度测量过程中气泡干扰的问题.结合C8051F020单片机新技术对检测信号进行数据采集和处理,使电路设计结构简单,提高了仪器测量的稳定性.通过实验分析,结果表明相对误差不大于3%.     

酚酞聚芳醚酮（PEK－C）填充料的研究

本文筛选出几种特定的酸性金属氧化物填料，研究了其粒度及粒子形状对ＰＥＫ－Ｃ的复合化效果和填充后的ＰＥＫ－Ｃ体系的力学性能、加工性能和结构形态。结果表明，ＴｉＯ２、Ｃｒ２Ｏ３、Ａ１２Ｏ３及ＭｏＳ２等与ＰＥＫ－Ｃ具有良好的亲合性，对ＰＥＫ－Ｃ起到了明显地增量、补强作用。在保持ＰＥＫ－Ｃ树脂的基本物理性能前提下，可降低注射用ＰＥＫ－Ｃ专用料的价格。     

An algorithm and observability research of autonomous navigation and joint attitude determination in asteroid exploration descent stage

In this paper, an autonomous relative navigation and joint attitude determination algorithm in asteroid exploration descent stage is researched based on feature point information of perpendicular asteroid surface image observed by optical navigation camera, distance vectors from spacecraft to asteroid measured by three angled installed lidars and relative velocity increment measured by accelerometer when the relative distance vector to the centroid of asteroid can not be obtained. The inertial attitude of spacecraft is determined by sun vector, star vectors and inertial angular velocity respectively measured by sun sensor, star trackers and inertial reference unit. Also, in order to obtain measurement error model transferred from sensor noise, a covariance matrix solver considering error correlation is presented via the error model of normalized vector to first order. Numerical simulation and improved observability evaluation of filtering are undertaken to discuss the results of complete sensor observation and weak observation of lidars, and verify the effectiveness of the presented relative navigation and attitude determination algorithm.     

医院信息系统项目管理的现状与突破

自20世纪90年代以来,我国医院信息系统发展迅速。到目前为止,全国绝大部分医院实现了信息化管理,并且逐步向区域医疗信息资源共享模式迈进。在医院信息化建设进程中,随着信息系统规模日益庞大,信息管理部门对它的驾驭能力捉襟见肘,原有粗放式的管理模式已远不能适应工作需要。有必要重新审视医院信息系统项目管理模式,实现新的突破。本文以医院信息科为视角,探讨将项目管理九大手段运用到医院信息系统项目建设过程中的作用及效果。