Effect of superfine grinding on physicochemical and antioxidant properties of pomegranate peel

Pomegranate peel powders were prepared by superfine grinding, whose effects were investigated on the composition, functional and antioxidant properties of the pomegranate peel products. Fluidised bed jet milling technology was used to process superfine pomegranate peel powder. The physical–chemical properties of coarse powder A (D50 = 413.4 μm) and B (D50 = 197.1 μm), fine powder C (D50 = 142.6 μm) and D (D50 = 41.2 μm), superfine powder E (D50 = 7.68 μm) and raw material powder (RMP) (D50 = 352.2 μm) were investigated in this study. SEM images revealed the shape and surface morphology of six pomegranate peel powders. The physical determinations showed that the smaller the powder particle size was, the greater the surface area (from 0.214 to 1.597 m² g^?1) and bulk density (from 0.653 to 0.751 g mL^?1) were, the smaller the angles of repose (from 51.69° to 38.74°) and slide (from 48.32° to 34.18°) were. The water holding capacity (WHC), water‐solubility index (WSI), polyphenols and flavonoids release were significantly improved as the size of pomegranate peel particle decreased. The results of FTIR and UV indicated that grinding process would not influence chemical composition of pomegranate peel. Vitamin C (VC) and butylated hydroxytoluene (BHT) were used in DPPH scavenging activity determination, and DPPH scavenging activity was A < RMP < BHT < B < C < D < E < VC.     

基于卡尔曼滤波的MUH姿态信号融合算法研究

利用MEMS陀螺仪和加速度计获取姿态的方法已被广泛用于低成本的民用无人直升机上,陀螺仪的漂移和加速度计中的运动加速度都会影响估计精度,设计了基于四元数的卡尔曼滤波器,根据三轴角速率陀螺和加速度计信号,融合无人直升机姿态信号,并针对陀螺仪的漂移和加速度计的测量误差,设计了自适应的量测噪声方差矩阵,补偿融合精度,得到稳定可靠且精度较高的姿态信息,用于无人直升机的内环增稳控制.实验表明,该方法估值精度较高,能有效解决小型无人直升机姿态求解问题.     

我国住宅产业化研究的回顾与展望

通过对国内近年来与住宅产业化相关的研究成果进行归纳和梳理,旨在厘清国内关于住宅产业化的概念界定、住宅产业化发展现状、现存问题及成因,针对国内住宅产业化研究提出几点建议并展望其未来发展趋势.     

Microstructure and Properties of Micro-Alloyed Mg-2.0Nd-0.2Sr by Heat Treatment and Extrusion

Magnesium (Mg) and its alloys have broad application prospects in the fields such as biomedical materials and automobile manufacturing. A micro-alloyed Mg-2.0Nd-0.2Sr (wt.%) magnesium alloy is designed and obtained through semicontinuous casting. The evolution of microstructures and tensile properties are investigated with different heat treatments and extrusion treatments. The grain sizes decrease significantly after extrusion, thus changing the fracture mode during the tensile testing process. The ultimate tensile strength (UTS), yield strength (YS) and elongation (EL) of the properly processed extrusion alloy (referred to as MNS-E2) reach to 247 MPa, 228 MPa and 24%, respectively. The dramatical improvement of mechanical properties results from the refined grains and interactions between dislocations and precipitates. Some nanoparticle bands blocking the slippage and movement of dislocations are also found in the MNS-E2 alloy. The above causes combined result in an integrated effect of grain boundary strengthening, dislocation strengthening, precipitation strengthening and nanoparticle band strengthening. The contribution of strengthening mechanisms of MNS-E2 alloy consists of grain boundary with around 96 MPa, dislocations with around 3.4 MPa, precipitation strengthening with around 45 MPa and the nanoparticle band with around 18 MPa, respectively.     

蒙脱石含量测定方法改进研究

用吸蓝量(MB)换算法测定蒙脱石含量,换算系数0.442不能用来准确计算其实际含量。由于吸蓝量和阳离子交换容量(CEC)与蒙脱石含量正相关,通过测定原矿、原矿提纯样以及提纯后杂质矿物的吸蓝量或CEC,进行加权或对比计算,即可得到原矿中蒙脱石的含量,这样可消除膨润土属性、属型等对测定结果的影响。改进的结果表明,不论加权法还是比值法,CEC也可用于测定蒙脱石含量;但加权法计算更为合理。蒙脱石、杂质矿物的纯度,以及它们的吸蓝量、CEC的精密度和准确度,是加权法测定准确与否的关键;比值法适用于细粒级或提纯后纯度较高情况下的测定。     

小浪底高边坡施工期监测反馈信息在开挖中的应用

黄河小浪底水利枢纽进出口高边坡工程的监测项目在施工期发挥了重要的作用。简要介绍该监测项目的实施情况，重点分析了施工期利用监测反馈信息评价边坡开挖和支护的设计方案的优劣和实际施工情况的安全性，并借以指导施工活动的过程。     

民族地区院校中药应用型人才培养模式研究

针对少数民族地区医药院校的特点,对培养面向基层经济建设需要的中药应用型人才的培养目标及培养模式进行了探索,初步总结中药应用型人才的培养模式,从人才培养模式的定位、课程体系构建、多元化的人才评价体系的构建,突出实验技能培训,改革教学方法手段,强化科研实习等方面的改革,培养以能力为本位的应用型人才。     

以就业为导向的药学多元化实践基地的探讨

探讨以社会求与学生就业意愿有机结合为导向的药学多元化实践基地建设思想,通过建设以学生生源地为依据的广西各地市三甲医院、药检所、制药企业等实习基地,方便学生学习及就业。建立"双模块双导师制"实践模式,强化岗前思想道德教育和技能训练,培养适合社会求的新型药学应用型人才。     

Effects of liquid phases on densification of TiO2-doped Al2O3–ZrO2 composite ceramics

This study investigated the densification behaviors and microstructural evolution of Al₂O₃–ZrO₂ (3Y) composite ceramics doped with four different amounts of TiO₂ (0, 1, 4, and 8 wt%; denoted as 0T, 1T, 4T, and 8T, respectively) to clarify the effect of TiO₂ dopants on densification. The shrinkage rate during densification increased with the increase in the amount of TiO₂. The development of grain boundary feature was also examined. The undoped ceramic showed clean grain boundaries. Thin liquid grain boundary phases were observed in 1T, whereas large liquid phases were found on the grain boundary and at the junction pockets in 4T and 8T. The results were discussed in terms of the relationship between densification and grain boundary feature.     

与教育国际化接轨,制作网络视频公课简

针对网络视频公开课（OCW）出现近十多年来的经验与现状,华东理工大学在原先国家精品课程视频公开的基础上,另行启动了包括全英文课程在内的视频公开课制作工作。运行工作针对国内教学的实际情况,探索了一些实际操作的经验,以供国内相关高校相互交流。