Directly compressed mini matrix tablets containing ibuprofen: preparation and evaluation of sustained release

Directly compressed mini tablets were produced containing either hydroxypropylmethylcellulose (HPMC) or ethylcellulose (EC) as release controlling agent. The dynamics of water uptake and erosion degree of polymer were investigated. By changing the polymer concentration, the ibuprofen release was modified. In identical quantities, EC produced a greater sustaining release effect than HPMC. Different grades of viscosity of HPMC did not modify ibuprofen release. For EC formulations, the contribution of diffusion was predominant in the ibuprofen release process. For HPMC preparations, the drug release approached zero-order during a period of 8 h. For comparative purposes, tablets with 10 mm diameter were produced.     

SMIF隔离技术的洁净微环境——洁净技术的新发展

叙述了当今世界空气净化的新概念--SMIF隔离技术。介绍了该项技术的国内研究发展情况。并以详细的技术对比数据显示了SMIF技术将成为21世纪高级别空气净化的主流。     

Accounting and billing software and user reactions: An interactive diagnostic audit trail

The selection of an accounting and billing software (ABS) system is a complicated process. The overall satisfaction derived from a system depends on many variables. This study analyzes the influence of ABS (predictor) variables on overall satisfaction. It confirms our hypotheses that ease of operation, computer reliability, and ease of programming are the major determinants of overall computer user satisfaction. These factors were used in the design of an ABS diagnostic system based on audit trails (DSAT).     

基于马斯洛需求层次理论的城市老年人餐饮小程序设计研究

保证老年人的饮食质量可以预防、调节或改善许多与年龄有关的疾病和状况[1]。该研究以马斯洛需求层次理论为导向,设计了一款微信小程序,采用MINA框架,基于XML,WXSS和JavaScript,利用基础组件和API来构建小程序相关界面与功能,小程序包含查找饮食活动、发布饮食活动、线上预定菜品、饮食数据的统计分析和海报分享等核心功能,简单易用界面简洁美观。该小程序的出现创新了老年餐饮服务模式,为加大社会参与老年就餐服务市场提供了新的路径,有利于提升城市老年人的饮食质量,市场前景广阔值得推广使用。     

校园生活综合服务平台小程序的设计与实现

针对大学生校园生活需求众多,生活区域集中的特点,分析了高校大学生的主要服务需求和现有解决方案的优缺点,基于微信小程序设计和开发了一款校园生活综合服务平台——阿米校园,并对其中的关键技术进行了分析。     

基于物联网的超市智能自助购物系统设计

针对传统超市购物存在导购困难、结算缓慢、用户体验性差等问题,提出了一种基于物联网的智能超市自助购物系统方案。系统主要采用RFID技术、无线网络通信、微信小程序以及动态网站开发等技术来实现。安装在购物车中的RFID获取商品标签信息,通过无线通信与远程云服务器进行数据交互。购物者通过移动终端的微信小程序从服务器端实时获取导购信息和购物车中的商品详细消费清单,通过电子支付快捷结算,无需排队。商家可通过后台管理网站进行商品管理和发布促销活动。该系统不仅提高了顾客的购物效率、增添了购物乐趣,同时也使得商家管理更加便利和高效。     

基于HL7的移动式微型临床实验室Mini Lis接口设计

由于移动式微型临床实验室集成了多种不同的医疗仪器,导致各应用系统之间难以实现数据信息交换与共享等问题;因此文章通过对微型临床实验室信息管理系统(Mini LIS)进行需求分析,研究了Mini LIS的接口设计;采用医疗信息行业国际前沿的HL7标准,结合XML编码方式,使用DOM技术实现对基于XML模式的HL7消息进行构建和解析,运用MQSeries信息传输系统作为中间件;实现了各仪器应用系统之间数据格式的统一,以及数据信息的交换与共享,解决了各应用系统间的通讯难题,成功集成了多种仪器,并在实际中取得了良好的应用效果.     

构建操作系统实践教学体系

本文在对比了多种操作系统实践教程的基础上,结合操作系统原理,根据教学内容构建了操作系统实践体系,并开发了具体的实践教学模块,为从根本上解决操作系统理论教学和实践教学脱离的现状提供了一个切实可行的参考方案。     

采用微型排水罩的药H焊丝水下焊接焊缝自动跟踪系统

针对水下焊接图像噪声大、清晰度差的特殊情况,设计并研制成功一套药芯焊丝水下焊接的视觉传感焊缝自动跟踪系统.该系统由视觉传感、图像预处理及偏差识别系统,控制系统和执行机构等组成.采用小波多尺度变换进行水下焊缝图像边缘提取,结果保留大多数的细节,得到有利于焊缝位置特征提取的预处理图像,在一种基于二值图像的焊缝中心位置识别算法计算后,得出焊缝偏差.在理论分析视觉传感焊缝自动跟踪系统模型的基础上,设计满足跟踪精度要求的规则自调整模糊算法.对影响跟踪系统精度的因素进行分析,并采用相应的措施以提高系统的精度.通过药芯焊丝湿法水下焊接焊缝自动跟踪试验表明,采用规则自调整模糊控制能够达到较高的焊缝跟踪精度.在斜线、折线和曲线三种不同形状待焊焊缝的跟踪试验中,系统都能满足药芯焊丝水下自动焊接的要求.经过改进微型排水罩,进行微型排水罩局部干法药芯焊丝水下焊接焊缝跟踪试验,采用规则自调整模糊控制,不仅得到满意的焊缝跟踪效果,还改善焊缝成形质量.     

Effect of oxide layer growth on fuel temperature of mini fuel plates

The effect of the oxide layer formed on the mini fuel plates is studied to evaluate fuel centerline temperature. For a part of U-Mo fuel qualification program, mini fuel plates, double-stacked as upper and lower plates, will be irradiated in the HANARO reactor for four cycles. In the present study, fuel performance and thermal hydraulic behavior during irradiation are numerically investigated using the MCNP and TMAP codes. The power released from the mini fuel plates is estimated using the MCNP code. From the neutronic analysis results, it is observed that the lower plate at the BOC during the 1st cycle releases the highest power, and the power gradually decreases during the irradiation test. The growth of the oxide layer thickness during the irradiation test is predicted using many correlations with various pH values ranging from 5.0 to 7.0. The pH value in the HANARO reactor is controlled between 5.7 and 6.2, and the oxide layer thickness is predicted by the Boehmite model for these two pH values. The oxide layer thickness predicted using the other correlations are bounded by these two predicted values. The maximum oxide layer thickness at the end of irradiation is approx. 9 and 68 μm with pH of 5.7 and 6.2, respectively. The Pawel model with a rate factor of 16 predicts the maximum oxide layer as 25 μm. Using the predictions of the oxide layer thickness, the centerline fuel temperatures are evaluated using the TMAP code. The maximum fuel temperature is not observed when the power released from the fuel is the highest. Because the temperature rise through the oxide layer is significant, the oxide layer thickness must be considered in the fuel temperature evaluation. The oxide formation saturates with time, and the fuel reaches the maximum temperature at the end of the saturation. After the maximum fuel temperature is reached, it starts decreasing, because the power decreases.