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基于PCS7的蒸发器自控系统设计与应用 被引量:5
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作者 贾兆虎 孙良 郑金吾 《化工自动化及仪表》 CAS 2012年第12期1548-1552,共5页
以SMPT-1000蒸发器单元为被控对象,分析其工艺流程、动态特性和控制要求,设计了蒸发器温度、液位和产品浓度的控制方案。通过现场实施,实现了控制系统从冷态的全自动开车。投产后,蒸发器液位、温度及产品浓度等指标均满足生产要求。
关键词 蒸发器 产品浓度 PCS7 组态
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预紧力作用下受拉层合板孔边接触问题研究
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作者 贾兆虎 刘斌 《机械设计与制造》 北大核心 2019年第10期251-253,共3页
预紧力作用下受拉复合材料层合板连接件的孔边受载情况发生变化,对结构承载性能产生一定影响,以单钉双剪复合材料层合板为研究对象,给出了复合材料层合板螺栓连接孔边不同区域的接触边界条件,在此基础上建立三维有限元模型,对预紧力影... 预紧力作用下受拉复合材料层合板连接件的孔边受载情况发生变化,对结构承载性能产生一定影响,以单钉双剪复合材料层合板为研究对象,给出了复合材料层合板螺栓连接孔边不同区域的接触边界条件,在此基础上建立三维有限元模型,对预紧力影响下的单钉双剪板孔边应力进行求解,获得了不同预紧力下孔边面内接触应力沿孔分布规律。结果表明:随着预紧力增加在连接孔的孔边接触区、过渡区和大部分非接触区,面内应力水平不断降低,但在孔的160°到180°的非接触区孔边应力取值出现一定上升趋势。 展开更多
关键词 复合材料层合板 预紧力 孔边接触 螺栓连接 孔边应力
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B_(4)C-TiB_(2)-SiC复合陶瓷的SPS制备及组织性能研究
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作者 赵鹏铎 王琪 +5 位作者 张磊 李茂 宋奇 张朝晖 尹仕攀 贾兆虎 《北京理工大学学报》 EI CAS CSCD 北大核心 2022年第6期658-664,共7页
针对B_(4)C陶瓷烧结性能较差、成本较高的技术问题,提出了一种新型的B_(4)C基复合陶瓷的制备方法.该方法以B_(4)C、Ti_(3)SiC_(2)及Si的混合粉作为初始粉体,通过放电等离子烧结技术(SPS)制备第二相(TiB_(2)+SiC)质量分数为30%的B_(4)C-T... 针对B_(4)C陶瓷烧结性能较差、成本较高的技术问题,提出了一种新型的B_(4)C基复合陶瓷的制备方法.该方法以B_(4)C、Ti_(3)SiC_(2)及Si的混合粉作为初始粉体,通过放电等离子烧结技术(SPS)制备第二相(TiB_(2)+SiC)质量分数为30%的B_(4)C-TiB_(2)-SiC复合陶瓷,利用SPS特殊的烧结机制以及烧结过程中的原位放热反应,有效提升了B4C陶瓷的烧结性能,降低了B_(4)C陶瓷的制造成本.研究结果表明,在烧结温度为1650°C,保温时间为5 min,烧结压力为50 MPa的条件下,制备得到了具有较高致密度(98.5%)的B_(4)C-TiB_(2)-SiC复合陶瓷.随着烧结压力的增加,B_(4)C-TiB_(2)-SiC复合陶瓷的硬度逐渐增大,断裂韧性不断减小,而复合陶瓷的弯曲强度则呈现出先缓慢增加后迅速增大的变化趋势. 展开更多
关键词 B_(4)C-TiB_(2)-SiC复合陶瓷 放电等离子烧结 烧结压力 微观组织 力学性能
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Failure mode and effect analysis of the risk management of non-integral-dosage drug dispensing in PIVAS
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作者 Kuikui Geng Juan He +3 位作者 Sheng Rong Zhaohu Jia Xiangxiang Zhang Tianlu Shi 《Journal of Chinese Pharmaceutical Sciences》 CAS CSCD 2024年第7期597-608,共12页
To mitigate risks associated with the prescription examination,marking,dispensing,checking,and review of non-integral-dosage drugs in Pharmacy Intravenous Admixture Service(PIVAS),we formed a project team.Employing th... To mitigate risks associated with the prescription examination,marking,dispensing,checking,and review of non-integral-dosage drugs in Pharmacy Intravenous Admixture Service(PIVAS),we formed a project team.Employing the failure mode and effect analysis(FMEA)management method,we identified potential risks in four critical steps of the non-integral-dosage drug dispensing process within PIVAS drug management:prescription verification,mixed allocation,and verification.For each step,we assigned scores for severity,incidence,and detectability,subsequently calculating the Risk Priority Number(RPN)to prioritize identified risks.Targeted measures for improvement were developed for steps with the highest RPN values.A total of 31 risk factors were documented in the management of non-integral-dosage drugs,with the dispensing process being particularly vulnerable.Specific measures were devised for eight high RPN risks.Following a 3-month optimization and improvement period,RPN values and incidences of internal differences were significantly reduced.The implemented measures demonstrated effective risk control.Notably,we established a comprehensive conversion system for partial-dose drug dispensing,directly translating into a volume of suction fluid for dispensing personnel based on doctor orders.This eliminated the need for manual secondary calculations,thereby standardizing and automating the dispensing of non-integral-dosage drugs in PIVAS.Simultaneously,our project team conducted a dissolution test on 23 types of drugs with non-integral dosage,revealing that the solvent volume increased for 11 types after dissolution.The dosage conversion for partial dosage was recalibrated based on the volume of the final solution to ensure dosage accuracy.Through the application of failure mode and effect analysis,we systematically managed the risks associated with non-integral-dosage drugs in PIVAS.This approach addressed safety concerns in the dispensing process,reduced errors,and ensured the safe and precise administration of medication to patients. 展开更多
关键词 PIVAS FMEA The non-integral-dosage drugs Risk management DISPENSING
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