三维光学扫描技术在3D打印中的应用

采用先进的三维光学扫描技术,借助计算机软件对SLS打印的缸盖上水夹层砂芯进行三维数字化全尺寸扫描,检测分析了SLS打印砂芯尺寸精度及尺寸变化规律。检测结果显示:上水夹层砂芯不满足打印设备精度要求,需要改进打印工艺。根据三维光学扫描检测分析结果明确了3D打印工艺调整方向,改进了工艺打印的缸盖上水夹层砂芯,经过三维光学扫描检测,砂芯尺寸精度得到了有效地提高。通过对三维光学扫描技术在3D打印中的应用研究,对SLS打印砂芯精度检测提供了一种更为准确直观的测量方法,三维光学扫描检测结果作为SLS打印工艺参数调整依据,为SLS打印出合格的砂芯奠定基础。     

高层建筑给排水系统的节水问题研究

倡导节能降耗一直是社会关注问题，高层建筑用水要求高，排水量大，浪费现象严重，在进行给排水安装时采用必要的节水措施就显得尤为重要。本文结合高层建筑用水现状，对给排水安装应采取的节水措施进行了研究分析。     

P25对TiO_2镀膜光催化活性的影响

通过向钛酸四正丁酯溶胶中添加纳米级TiO2粉末（P25）,来提高煅烧TiO2镀层的光催化活性。用不锈钢丝网作为煅烧TiO2镀层载体,以甲基橙降解效果来衡量TiO2镀层的光催化活性。实验结果表明,当溶胶中P25添加量为1g／L、镀膜次数为4次时,镀层光催化活性达到最大,150min内甲基橙降解率达到69．8％。     

延缓交联深部调剖技术在大港油田的应用

该文概要地介绍了以聚合物为主剂的延缓交联体系深部调剖的机理、性能及添加剂在体系中的作用；提出了矿场应用过程中质量控制的方法。该体系在三个不同类型油藏的五个注水井组进行推广应用，成功率为１００％，取得了明显的增油降水效果。矿场应用结果表明，该体系适用温度１２０℃左右，总矿化度低于２００００ｍｇ／Ｌ的砂岩或灰岩油藏。     

延缓交联深部调剖技术在大港油田的应用

该文概要地介绍了以聚合物为主剂的延缓交联体系深部调剖的机理，性能及添加剂在体系中的作用，提出了矿场应用过程中质量控制的方法，该体系在三个类型油藏的五个注水井组进行推广应用，成功率为１００％，取得了明显的增油降水效果，矿场应用结果表明，该体系适用温度１２０℃左右，总矿化度低于２０００ｍｇ／Ｌ的砂岩或灰岩油藏。     

论企业人力资源开发与管理

国有企业在改革发展建设中，如何围绕提升企业核心竞争力，贯彻“以人为本”的管理理念，加强人力资源管理成为当前企业十分关注的事。根据当前企业存在的问题，探讨人力资源的开发和管理的途径。     

Protective effects of Dragon''s Blood on blood coagulation and NO/iNOS level in myocardium and serum of rats in simulated microgravity

To investigate effects of Dragon''s Blood (DB), a traditional Chinese medicine, on blood coagulation and NO/iNOS level in myocardium and serum of rats in simulated microgravity for the first time, Sprague Dawley (SD) rats were randomly divided into six groups:(a) 5-day control group, (b) 5-day model group, (c) 5-day drug group, (d) 21-day control group, (e) 21-day model group, and (f) 21-day drug group. Blood coagulation and NO/iNOS level in myocardium and serum were examined after 5 and 21 days of simulated microgravity respectively. The results showed that blood of tail-suspended rats was in a hypercoagulable state that could not be converted with time extending. Conversely, DB changed these parameters towards normal level and the curative effects became better when tail-suspension lasted till the 21st day. NO concentration of both myocardium and serum for two periods all increased markedly and DB could effectively reduce these increases except that of 21-day myocardium NO. Activity of iNOS increased markedly as early as 5 days and became more serious on the 21st day, while DB showed preventive effect on the 21st day. Western Blot analysis illustrated that the expression of iNOS in the 5-day model group increased significantly over the 5-day control group and the expression in the 5-day drug group dramatically returned to the normal level. The similar trend was observed on the 21-day groups without notable variances. The findings of this study can serve for the further use of Dragon''s Blood in space diseases.     

CaCO3—K2CO3—KCl—Na2CO3—H2O体系的一种新化合物

碳酸钙同含碳酸钠和氯化钾的浓碳酸钾溶液反应,生成实验式为CaCO_3·KCl·3(Na,K)_2CO_3·6H_2O(x≤0.25)的新化合物,此物对碳酸钾溶液提纯及进而制取无钠的钾化合物有重要意义。     

轴流式风机的技术改造及应用

阐述了轴流式通风机改造的必要性.介绍了采用三元流动理论对叶片进行重新设计、应用计算机模拟技术对动叶进行模态分析试验及对高效区分布特性的研究转移了高效区的位置等措施,对风机进行了改造.并经运行实践证明,风机改造后效率提高、噪声降低、运行安全.