安瓿瓶洗烘灌封联动机组联动控制改进研究

安瓿瓶洗烘灌封联动机组是一项效率高、成本低的联动生产机器设备,整个机器装备是由洗瓶设备、灭菌干燥设备和灌封机器设备所组成,不同于传统工艺流程,是一种技术先进的高科技生产线,本文通过对这种联动机组存在的弊端进行发现和总结,进而找出解决这种不足的改进方案,以供相关人员参考和学习。     

壮药三叶香茶菜乙酸乙酯部位化学成分预试验研究

目的:通过系统预法对壮药三叶香茶菜乙酸乙酯部位浸膏中可能含有的化学成分进行预实验,初步探索三叶香茶菜乙酸乙酯部位浸膏的化学成分。方法:三叶香茶菜乙酸乙酯部位浸膏用水、乙醇和石油醚提取,取滤液进行研究,通过多种指示剂和显色剂的颜色或沉淀反应,对三叶香茶菜乙酸乙酯部位浸膏可能含有的化学成分进行初步研究。结论:三叶香茶菜乙酸乙酯部位浸膏中可能含有糖、多糖、苷类、皂苷、有机酸、黄酮类、酚类、香豆素、内酯、植物甾醇、三萜类等化学成分,为进一步研究壮药三叶香茶菜乙酸乙酯部位的化学成分和药理作用提供依据。     

横掠蛋形和椭圆管束对流换热的数值模拟研究

本文运用FLUENT软件对横掠蛋形和椭圆管束的换热进行二维数值模拟,并与圆管管束的挟热进行对比.通过改变椭圆管束与蛋形管束的节径比(S/2b)和长短轴比(a/b),得到两种管束的的换热规律,为强化管束换热提供参考.     

液相色谱法测定注射用维库溴铵的有关物质

目的：建立注射用维库溴铵有关物质的检测方法。方法：采用反相HPLC法,色谱柱为Agilent EclipseXD（BC-18,250×4.6mm,5μm）,流动相为：pH为6.5的18.0g·L^-1的四甲基氢氧化铵的溶液-甲醇-乙腈（50：250：700）,流速1.5ml·min-1,柱温40℃,进样量20μL,检测波长为210nm。稀释剂：乙腈：0.01mol·L^-1盐酸溶液（1：1）;结果：杂质A、杂质C和杂质E的检测限都为0.007%、杂质D和维库溴铵的检测限为0.006%,定量限为0.02%,柱温、流速、流动相比例经过微小变化不影响检测结果。结论：本方法灵敏度高,准确度高,可用于注射用维库溴铵有关物质的检测。     

现浇砼空心无梁楼盖GBF高强薄壁管安装方法

山东师范大学长清校区理科教学楼工程B1、B2区采用现浇空心无梁楼盖,采用GBF高强薄壁空心管成孔,施工过程中采用Φ14钢筋加工成定型限位插排,使空心管定位准确,安装快捷,同时利用8#钢丝对空心管进行固定,成功解决了混凝土浇筑过程中空心管的上浮问题,提高了工作效率.     

The effects of transport by pneumatic tube system on blood cell count,erythrocyte sedimentation and coagulation tests

Introduction:

Today, the pneumatic tube transport system (PTS) is used frequently because of its advantages related to timing and speed. However, the impact of various types of PTS on blood components is unknown. The aim of this study was to examine the influence of PTS on the quality of routine blood cell counts, erythrocyte sedimentation, and certain blood coagulation tests.

Materials and methods:

Paired blood samples were obtained from each of 45 human volunteers and evaluated by blood cell count, erythrocyte sedimentation, and several coagulation tests, including prothrombin time (PT) and activated partial thromboplastin time (aPTT). Blood samples were divided into 2 groups: Samples from group 1 were transported to the laboratory via the PTS, and samples from group 2 were transported to the laboratory manually. Both groups were evaluated immediately by the tests listed above.

Results:

The blood sample test results from groups 1 and 2 were evaluated and compared. No statistically significant differences were observed (P = 0.069–0.977).

Conclusion:

The PTS yielded no observable effects on blood cell counts, erythrocyte sedimentation, or PT and aPTT test results. We concluded that the PTS can be used to transport blood samples and yield reliable results for blood cell counts, erythrocyte sedimentation, and several coagulation tests.     

Learning assessments in search-as-learning: A survey of prior work and opportunities for future research

People often search for information in order to learn something new. In recent years, the “search-as-learning” movement has argued that search systems should be better designed to support learning. Current search systems (especially Web search engines) are largely designed and optimized to fulfill simple look-up tasks (e.g., navigational or fact-finding search tasks). However, they provide less support for searchers working on complex tasks that involve learning. Search-as-learning studies have investigated a wide range of research questions. For example, studies have aimed to better understand how characteristics of the individual searcher, the type of search task, and interactive features provided by the system can influence learning outcomes. Learning assessment is a key component in search-as-learning studies. Assessment materials are used to both gauge prior knowledge and measure learning during or after one or more search sessions. In this paper, we provide a systematic review of different types of assessments used in search-as-learning studies to date. The paper makes the following three contributions. First, we review different types of assessments used and discuss their potential benefits and drawbacks. Second, we review assessments used outside of search-as-learning, which may provide insights and opportunities for future research. Third, we provide recommendations for future research. Importantly, we argue that future studies should clearly define learning objectives and develop assessment materials that reliably capture the intended type of learning. For example, assessment materials should test a participant’s ability to engage with specific cognitive processes, which may range from simple (e.g., memorization) to more complex (e.g., critical and creative thinking). Additionally, we argue that future studies should consider two dimensions that are understudied in search-as-learning: long-term retention (i.e., being able to use what was learned in the long term) and transfer of learning (i.e., being able to use what was learned in a novel context).     

幼儿安全教育问题与对策

幼儿园在为幼儿创设安全的生活活动环境前提下,还要重视幼儿的安全教育,培养幼儿自我保护的意识和能力。本文试就当前幼儿安全教育问题及如何有效实施教育进行阐述。     

农产品质量安全追溯应用展望与对策

广东人口众多,食用农产品消费量和流通量巨大,同时还承担着我国港澳地区鲜活农产品的主要供给。农产品质量安全不仅影响消费者健康及社会和谐稳定,还关系到农业产业发展。建立追溯体系是保障农产品质量安全的重要手段。从技术创新、行业应用、区域推动等层面梳理广东农产品质量安全溯源领域的成就和面临的主要问题,在此基础上构建农产品质量安全追溯的关键技术体系,提出种植类和养殖类产品追溯的解决方案,并对如何全面推进广东农产品安全追溯体系建设提出完善标准化体系、解决农产品追溯信息断层问题、加强诚信建设及电商发展、倒逼农产品追溯市场化机制形成,以及建立跨部门、跨区域的农产品质量安全追溯信息管理平台等对策建议。     

高校化学实验室安全管理的实践与探索

化学实验室的安全管理是高校开展教学和科研的基本保证。在建立健全的实验室安全管理规章制度基础上,化学实验室的管理必须从化学试剂及药品的安全管理、实验仪器与设备的安全管理、实验室消防安全及实验人员安全教育等方面入手,坚持有制度可依、有制度必依,强化实验人员的安全意识,保障师生人身和财产安全及实验安全有序开展,推动高校实验室管理工作不断发展。     

西藏生态安全屏障保护与建设成效评估

西藏是青藏高原的主体,地球第三极的核心,地理环境十分特殊,全球生态地位极为重要。2009年2月18日,国务院第50次常务会议审议并通过了《西藏生态安全屏障保护与建设规划(2008—2030年)》,提出用近5个"五年规划"期的时间,投入资金155亿元,实施保护类、建设类和支撑保障类三大类10项工程,基本建成国家生态安全屏障。截至2015年,一期工程顺利实施完成。根据中科院与西藏自治区科技合作座谈会精神,在中科院"西部行动"计划和"战略性先导科技专项"支持下,完成了西藏生态安全屏障保护与建设一期工程成效评估。结果表明,一期工程进展顺利,完成了阶段目标;高寒生态系统结构整体稳定,生态格局变化率低于0.15%;生态系统服务稳中略增,增幅3%—5%。但西藏生态环境脆弱,筑牢屏障任务依然艰巨。     

食管癌根治术胃管意外拔出原因分析及干预对策

通过对我院2011年1月～12月84例食管癌根治术患者留置的胃管观察,总结胃管意外拔出的原因,包括术前术中术后各阶段的护理风险分析,认为对食管癌根治患者留置胃管采取相应的护理干预,保持其固定牢靠,引流通畅,是减少术后并发症的重要措施,也是手术成功的关键。