Design and Implementation of College Class Quantitative Assessment System

近几年来，我国高等院校在国家招生相关政策的调整下，高等院校进行了大规模的扩招，严重影响了高等院校的教学管理、学生管理、考勤管理的正常运作等。对于学生管理工作来说数据量大，需要及时更新数据比较复杂，需要的工作人员多，从而导致数据信息的不规范，管理效率低等。随着时代网络不断的进步，计算机应用技术不断普及并影响着社会生活的各个领域，所以说计算机应用在我们的社会发展中发挥重要作用，很多的传统手工管理模式在不久的将来必然会被计算机的信息管理所代替。所以建立一个功能完善、性能良好的系统管理平台是高校管理工作不可缺少的一项重要工程。计算机凭借检索迅速、查找便捷、可靠性较高、存储量庞大、保密性高、寿命长、成本...In recent years, the colleges and universities massive enlarging recruiting scale under the adjustment of our national policy. This has brought a lot of impact to the teaching of colleges and universities, students, logistics, and other aspects of the management. For the student management work as the large amount of data needs to update them in time which is complex and will need many workers, so...学位：工程硕士院系专业：软件学院_软件工程学号：X201323099

Composite microparticles of ibuprofen/lipid generated by supercritical fluids from their melts

采用CO2及N2辅助的气体饱和溶液微粒形成技术制备布洛芬/肉豆蔻酸、布洛芬/三棕榈酸甘油酯复合微粒,考察它们的形态、颗粒分布以及复合微粒中药物的溶出情况。N2辅助过程制得的布洛芬(质量分数5%)/肉豆蔻酸复合微粒与用该过程得到的纯肉豆蔻酸大小及粒径分布大致相同,而CO2辅助过程制得的布洛芬/肉豆蔻酸复合微粒却要比该过程得到的纯肉豆蔻酸的粒径要大,分布也较宽;CO2及N2辅助形成的布洛芬/肉豆蔻酸复合微粒无缓释效果。用N2辅助制备得到的含20%布洛芬(质量分数)的复合微粒保持了三棕榈酸甘油酯微粒化后的颗粒形貌,粒径更大;用CO2辅助制备得到的含20%布洛芬的复合微粒其粒径比三棕榈酸甘油酯微粒化后的颗粒粒径要小,粒径分布更窄;布洛芬/三棕榈酸甘油酯复合微粒具有缓释效果,而且用N2辅助制备的布洛芬含量为5%的复合微粒比布洛芬含量为20%的复合微粒溶出慢。Using the CO2-assisted and N2-assisted atomization processes,ibuprofen/lipid composite microparticles can be produced;the lipid includes myristic acid(MA) and tripalmitin(TP).The ibuprofen(5% in mass ratie)/MA composite microparticles show similar particle sizes to that of pure MA from the N2-assisted process,while the composite microparticles have a large particle size and particle size distribution,compared to that of pure MA from the CO2-assisted process.The dissolution reveals no controlled release of ibuprofen for the ibuprofen/MA composite microparticles either from the N2-assisted process or from the CO2-assisted process.For the ibuprofen/TP system,the obtained composite microparticles containing 20%(in mass) ibuprofen show similar particle morphology,while has a larger particle size(PS) than that of the pure myristic acid particles in the case of N2-assisted process.Nevertheless,the microparticles from the CO2-assisted process has a small PS and narrow PSD,compared to that of the pure myristic acid particles.The obtained ibuprofen/TP composite microparticles containing 5% or 20% ibuprofen show an evidently controlled drug release.For example,the drug release is only 20% in 500 min for the ibuprofen/TP microparticles containing 20% ibuprofen,prepared by the CO2-assisted process.国家自然科学基金资助项目(20406015);; 福建省新世纪优秀人才支持计划;; 福建省自然科学基金资助项目(2007J0167

Preparation of Tripalmitin Micronization by Supercritical Fluids Technique

利用气体饱和溶液微粒形成技术实验装置,分别用超临界n2和超临界CO2制备三棕榈酸甘油酯微粒,探讨压力、温度以及喷嘴大小等工艺参数对微粒(粒径、粒径分布和形貌)的影响。结果表明:n2辅助过程得到的微粒基本为球状;预膨胀压力越高,粒径越小,粒径分布越窄;100μM喷嘴下制得的微粒粒径最小,且分布较均匀。CO2辅助过程得到的微粒部分为球状,部分为针状和片状;预膨胀压力越高,粒径越小,粒径分布越窄;喷嘴直径大小对微粒平均粒径及粒径分布影响不大;预膨胀温度升高,颗粒的粒径稍微增大。CO2辅助过程得到的微粒粒径比n2辅助过程得到的微粒粒径稍大,但两者的粒径分布相差不大。Generation of tripalmitin microparticles from its melts was investigated by using both supercritical CO2 and supercritical N2.The effects of various operating conditions,such as the pre-expansion pressure,pre-expansion temperature,and nozzle size on the particle morphology,particle size and particle size distribution(PSD) were investigated.Results showed that microspheres were obtained from the N2-assisted process,the particle size decreased and PSD narrowed with the increasing of the pre-expansion pressure,nozzle size showed no obvious effect on the microparticles,and pre-expansion temperature should be less than 72 ℃ to obtain solid particles.From the CO2-assited process,spherical,lamellate and needle-like particles were obtained,the particle size decreased,PSD narrowed with the increasing of the pre-expansion pressure,nozzle size showed no obvious effect on the particles and the pre-expansion temperature slightly increased the average size of particles.Particles' PSD from supercritical CO2 was close to that from supercritical N2

产科护士母乳喂养知识水平及其影响因素的现状调查

目的调查产科护士母乳喂养知识水平,并分析其影响因素。方法采用母乳喂养知识问卷对127名产科护士进行调查。结果产科护士缺乏全面而系统的母乳喂养知识,母乳喂养知识回答平均正确率为57.31%。年龄和产科工作年限是产科护士母乳喂养知识的主要影响因素。结论应对产科护士进行针对性的母乳喂养知识培训,提高产科护士在临床工作中母乳喂养的支持力度

Modeling of ammonothermal growth processes of GaN crystal in large-size pressure systems

Gallium nitride (GaN) is a wide-bandgap semiconductor material with a wide array of applications in optoelectronics and electronics. Modeling of the fluid flow and thermal fields is discussed, and simulations of velocity and volumetric-flow-rate profiles in different pressure systems are shown. The nutrient is considered as a porous media bed, and the flow is simulated using the Darcy-Brinkman-Forchheimer model. The resulting governing equations are solved using the finite-volume method. We analyzed the heat and mass transfer behaviors in autoclaves with diameters of 2.22, 4.44, and 10 cm. The effects of baffle design on flow pattern, and heat and mass transfer in different autoclaves are analyzed. For the research-grade autoclave with diameter of 2.22 cm, the constraint for the GaN growth is found to be the growth kinetics and the total area of seed surfaces in the case of baffle opening of 10%. For large-size pressure systems, the concentration profiles change dramatically due to stronger convection at higher Grashof numbers. The volumetric flow rates of the solvent across the baffles are calculated. Since ammonothermal growth experiments are expensive and time consuming, modeling becomes an effective tool for research and optimization of ammonothermal growth processes

氨热法生长氮化镓晶体中传热传质的研究

本文利用基于非正交网格的二阶精度有限体积法，对氨热法生长过程中温度场和流场进行了模拟，其中隔板开孔率分别为10％（中心开孔5％，侧壁与隔板边缘开孔5％）和20％（中心开孔10％，侧壁与隔板边缘开孔10％）。通过对流场和温度场的分析，了解了高压釜内部营养素的输运及溶液结晶的本质。结果显示在釜底的多孔介质层流动较弱，在流体层流动较强。在多孔介质层热量的输运主要通过热传导；在流体层中，流体与原料的分界处以及流体和高压釜的侧壁出现了大的温度梯度

EFFECT OF MAGNETIC FIELD ON THERMOCAPILLARY CONVECTION IN A DOUBLE-DIFFUSIVE LIQUID LAYER

通过数值模拟的方法对磁场作用下的双扩散液层热毛细对流进行了研究,模型中同时考虑了热毛细效应和溶质毛细效应的存在.研究结果显示,外部磁场能够有效削弱液层内热毛细对流的强度,改变热毛细对流的对流结构;随着磁场强度的增大,液层内热毛细对流的对流强度逐渐减小,热质传递过程中扩散效应逐渐得到增强;最终,溶质浓度沿水平方向呈梯度分布.因此,当磁场强度足够大时能够实现晶体生长中所需的纯扩散条件

SiC晶体生长中流场的优化设计

物理气相输运法（PVT）是实验室最为常见的碳化硅（SiC）大块单晶生长方法。本文在碳化硅晶体生长模型化研究中，针对碳化硅单晶PVT生长过程中的传热传质等现象引入了对流传热中的场协同原理，利用这一原理对生长室内的流场温度场进行了优化，并对改良前后分别进行了数值模拟，研究了该原理对晶体生长的影响。实验室碳化硅单晶的生长成功率从优化设计前的30％提高到90％

OPTIMIZATION OF THE FLOW FIELD IN SIC CRYSTAL GROWTH

物理气相输运法(PVT)是实验室最为常见的碳化硅(SiC)大块单晶生长方法. 本文在碳化硅晶体生长模型化研究中, 针对碳化硅单晶PVT生长过程中的传热传质等现象引入了对流传热中的场协同原理, 利用这一原理对生长室内的流场温度场进行了优化, 并对改良前后分别进行了数值模拟, 研究了该原理对晶体生长的影响. 实验室碳化硅单晶的生长成功率从优化设计前的30％提高到90

INVESTIGATION ON HEAT AND MASS TRANSFER IN AMMONO-THERMAL GROWTHS OF SINGLE GAN CRYSTALS

本文利用基于非正交网格的二阶精度有限体积法,对氨热法生长过程中温度场和流场进行了模拟,其中隔板开孔率分别为10%(中心开孔5%,侧壁与隔板边缘开孔5%)和20%(中心开孔10%,侧壁与隔板边缘开孔10%).通过对流场和温度场的分析,了解了高压釜内部营养素的输运及溶液结晶的本质.结果显示在釜底的多孔介质层流动较弱,在流体层流动较强.在多孔介质层热量的输运主要通过热传导;在流体层中,流体与原料的分界处以及流体和高压釜的侧壁出现了大的温度梯度