新形势下学校德育工作的发展趋向

德育工作是学校管理工作的灵魂,是素质教育的重要体现,对学生的身心健康全面发展有着有着重要作用。全球化的发展和科学技术的进步,使社会环境发生了巨大变化,新形式下,学生面临的社会选择增多,心里更复杂,怎样加强德育工作潜移默化地引导学生正确地选择,避免不良生活方式,成为当下应该关注的重要问题,也对新时期德育工作的发展指出了方向。     

气液并流向上填充鼓泡塔液体混合特性的研究

在内径为165 mm气液并流向上填充鼓泡塔中采用示踪法考查了表观气速、表观液速、液体黏度、填料大小等因素对液体轴向混合特性的影响。根据实验结果得出:Peclet准数随表观液速的增加而增大,轴向返混程度减小,而随表观气速或液相黏度的增加而Peclet准数略有减小,轴向混合程度增加。同时,填料的引入明显减少轴向混合程度,随着填料直径的增加,Peclet准数明显减少,轴向混合程度增大。根据实验结果,关联了实验范围内Peclet准数的计算式,为填充鼓泡塔反应器的设计与放大提供了一定的指导作用。     

如何加强和改进职校生的思想政治教育工作

当前，国际国内形势正在发生很大的变化，职校生思想政治教育的工作面临着许多新问题、新情况、新挑战，为此我们必须清醒地认识到当前形势发展对加强和改进职校生思想政治教育工作的严峻性，切实加强对教育工作的预见性、针对性和创新性，牢牢抓住工作的主动权。现本文就如何加强和改进职校生思想政治教育工作进行一下简要阐述。     

上海市非伤寒沙门菌感染的流行病学负担概率估计

目的概率评估上海市非伤寒沙门菌(以下简称"沙门菌")感染的流行病学负担,为上海市食源性疾病的防控提供决策依据。方法随机抽取上海市60个街道/乡镇,通过入户问卷调查获得居民急性胃肠炎的人年发病及就诊情况。随机抽取上海市23家监测医院,获得患者采样率、检测率、阳性率等数据。从国家"传染病报告信息管理系统"中获得沙门菌感染病例的报告率。根据疾病发病与报告金字塔建立模型,采用蒙特卡洛模拟,从主动监测和被动报告两种方法估计上海市沙门菌流行病学负担。结果上海市居民急性胃肠炎人群调查获得年发生率为23 261例/10万,患者就诊率为20.47%(26/127)。监测医院腹泻病例的粪便采样率为21.66%(5 974/27 587),沙门菌阳性率为3.53%(211/5 974)。沙门菌阳性的报告率为81.04%(171/211)。根据被动报告病例直接计算的年发病率仅为5例/10万。被动报告概率估计的上海市沙门菌年发病率为270例/10万[95%可信区间(95%CI):185~399],估计每年发病人数6.21万(95%CI:4.25~9.18),总低估系数为60∶1。主动监测估计沙门菌感染年发病率为686例/10万(95%CI:549~843),估计每年发病人数为15.78万(95%CI:12.64~19.42),总低估系数为154∶1。经过比较,主动监测估计结果为被动报告估计结果的2.54倍。沙门菌感染具有较明显季节性,每年5~8月是沙门菌感染的高发期。结论食源性疾病主动监测估算沙门菌感染年发病率远高于被动报告估算的年发病率,说明主动监测在掌握疾病发病、就诊和流行病学负担估计方面具有较好的优势,同时发现患者就诊率是影响沙门菌感染总病例数估计的最大因素。本研究进一步证明疾病负担金字塔模型在我国食源性疾病单病种疾病负担领域的可行性。     

电阻层析成像技术在气液(固)多相流动体系中的应用进展

Electrical resistance tomography (ERT) has been widely used in monitoring and measuring gas?liquid?(solid) multiphase flow systems as a fast, non-invasive, radiation-free, simple equipment compared to conventional methods and other tomographic modes. For the gas?liquid?(solid) multiphase flow system, the principle of ERT test was introduced, and the characteristics of ERT and other measurement technologies were analyzed in this work. The three important characteristics and process parameters (flow pattern identification, phase holdup, bubble size and distribution) of ERT were reviewed in detail. Problems to be solved in the application process of ERT technology in the gas?liquid systems were discussed (the standardization of flow pattern identification, the accuracy of identification process parameters, the equalization of time resolution and spatial resolution, etc.). Based on the development trend of ERT technology in the field of multi-phase flow parameter detection and its subsequent research directions, a model based on electrode array optimization, image reconstruction algorithm or 3D/4D field establishment was proposed, which combined the dynamic information and fluid dynamics numerical simulation of industrial process parameters. And ERT's rich flow field information can effectively verify the accuracy of mathematical simulation, real-time monitor and predict industrial processes, and effectively prevent or inhibit the uncertainty of chemical production process. At the same time, it was proposed to use the cross-knowledge between different disciplines to broaden the application fields of ERT, such as fluid mechanics in microscale equipment, biomedical testing diffusion properties of serum in dry tablets, online monitoring and analysis in the field of food processing, etc. As a visualization tool of fluid flow, ERT 2D and 3D real-time visualized flow information deepened the understanding of the complex characteristics of multi-phase flow, realized the purpose of optimizing operating conditions, improving efficiency, reducing costs and overall monitoring of production process, and promoted the application of ERT in chemical industry, petroleum, medicine, environmental monitoring, food processing, mineral flotation, material transportation and other fields.     

博世在泉州益家万博城的应用案例解析

正1项目概况益家万博城位于泉州高新技术开发区(石狮园)内,是福建省最大的建材市场,项目共分三期工程,总用地面积约为6.7万m2,总建筑面积21万m2,商业部分12万m2,办公楼部分4.9万m2,其他配套部分4.1万m2。A、B 2个大型商业场馆,集家居、建材、餐饮、超市、休闲娱乐、商务办公、居家公寓、星级酒店等多种需求,打造一个专业化"一     

SEBS高黏度溶液气液鼓泡塔的流体力学研究

针对SBS加氢反应器开发与设计，以SEBS-1650己烷溶液为液相，采用差压法和床层塌落法研究了气液鼓泡塔中高黏度溶液的流体力学行为，考察了黏度对低表面张力溶液的气含率、大小气泡气含率、大小气泡上升速度和比表面积等因素的影响。结果表明，随黏度增加，大气泡增多，气含率明显降低，塔内流型处于湍流区；由床层塌落曲线确定鼓泡塔内存在三种类型的气泡：大气泡、小气泡及细小气泡，随黏度增加，小气泡与细小气泡逐渐减少；黏度对大小气泡的上升速度略有影响，比表面积随黏度增加而明显降低。根据实验结果给出了大小气泡气含率与平均气含率的计算公式。