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垂直内型腔型电火花线切割机床的研究
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作者 蒋建强 曹承栋 梅建恩 《武汉理工大学学报》 EI CAS CSCD 北大核心 2007年第12期145-146,153,共3页
论述了高速走丝电火花线切割机床的结构特点,对高速走丝线切割机床的结构进行分析和改进,设计一种实用新型电火花线切割机床,不仅能提高其加工精度,而且能插入型腔内部进行加工。
关键词 实用 线切割 机床 内型腔
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盘类零件内型腔尺寸检测
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作者 宋慧军 李赞 +2 位作者 李有 于菲 赵丹 《科技创新与应用》 2014年第33期77-78,共2页
航空发动机中,盘类、机匣类零件是航空发动机的重要零件,对航空发动机安全可靠性与使用寿命有很大影响。盘类零件结构复杂、刚性差,精度要求高,该测具解决了盘类、机匣类环形零件内腔型面直径尺寸大于零件开口直径尺寸测量的问题。采用... 航空发动机中,盘类、机匣类零件是航空发动机的重要零件,对航空发动机安全可靠性与使用寿命有很大影响。盘类零件结构复杂、刚性差,精度要求高,该测具解决了盘类、机匣类环形零件内腔型面直径尺寸大于零件开口直径尺寸测量的问题。采用测量销可旋转式新结构,解决测具用标准件对表后无法进入零件内检测的问题。测具通用性强,可检测不同高度、不同型面尺寸各种盘类零件,提高了盘类环形零件的测量精度和合格率。 展开更多
关键词 盘类零件 内型腔 旋转式测量销
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数控铣削内型腔的手工编程方法分析与研究
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作者 徐运芳 潘建新 曾辉藩 《机械工程师》 2012年第1期45-46,共2页
对数控铣削加工不同的内型腔进行了分析和研究,以几种不同的内型腔加工为例,提出了几种加工内型腔零件手工编程的方法,采用不同的编程方法对内型腔铣削进行编程,可以简化编程,优化程序,在实际加工中可以节省加工时间,提高生产效率。
关键词 内型腔铣削 手工编程 旋转指令 镜像指令
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高温合金零件特殊内型腔的加工 被引量:1
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作者 王永军 《金属加工(冷加工)》 2022年第6期22-25,共4页
介绍一种高温合金材料零件特殊内型腔的加工工艺方案。针对高温合金材料切削性能及零件内型腔的特殊性进行分析,通过设计专用刀具、确定切削方法、选用合理的切削参数以及编制特殊设计的数控程序,解决了特殊内型腔的加工难题。
关键词 高温合金 内型腔 刀具 切削方法 数控程序
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基于Pro/E的注塑模具设计与Mastercam加工 被引量:5
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作者 李成林 高文科 李婧 《机械制造与自动化》 2010年第1期43-45,共3页
模具在现代生产中,是生产各种工业产品的重要工艺装备,它以其特定的形状通过一定的方式使原材料成形,并且具有优质、高产、省料和低成本等特点。通过座体零件的具体实例,说明了该零件模具的Pro/E设计过程,具有一定的借鉴意义。
关键词 模具 内型腔 熔模 分型面 模具CAD/CAM
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Relationship between acute kidney injury before thoracic endovascular aneurysm repair and in-hospital outcomes in patients with type B acute aortic dissection 被引量:8
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作者 Hong-Mei REN Xiao WANG +5 位作者 Chun-Yan HU Bin QUE Hui AI Chun-Mei WANG Li-Zhong SUN Shao-Ping NIE 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2015年第3期232-238,共7页
Objective Acute kidney injury (AKI) frequently occurs after catheter-based interventional procedures and increases mortality. However, the implications of AKI before thoracic endovascular aneurysm repair (TEVAR) o... Objective Acute kidney injury (AKI) frequently occurs after catheter-based interventional procedures and increases mortality. However, the implications of AKI before thoracic endovascular aneurysm repair (TEVAR) of type B acute aortic dissection (AAD) remain unclear. This study evaluated the incidence, predictors, and in-hospital outcomes of AKI before TEVAR in patients with type B AAD. Methods Between 2009 and 2013, 76 patients were retrospectively evaluated who received TEVAR for type B AAD within 36 h from symptom onset. The patients were classified into no-AKI vs. AKI groups, and the severity of AKI was further staged according to kidney disease: im- proving global outcomes criteria before TEVAR. Results The incidence of preoperative AKI was 36.8%. In-hospital complications was significantly higher in patients with preoperative AKI compared with no-AKI (50.0% vs. 4.2%, respectively; P 〈 0.001), including acute renal failure (21.4% vs. O, respectively; P 〈 0.001), and they increased with severity of AKI (P 〈 0.001). The maximum levels of body tem- perature and white blood cell count were significantly related to maximum serum creatinine level before TEVAR. Multivariate analysis showed that systolic blood pressure on admission (OR: 1.023; 95% CI: 1.003-1.044; P : 0.0238) and bilateral renal artery involvement (OR: 19.076; 95% CI: 1.914 190.164; P = 0.0120) were strong predictors of preoperative AKI. Conclusions Preoperative AKI frequently occurred in patients with type B AAD, and correlated with higher in-hospital complications and enhanced inflammatory reaction. Systolic blood pressure on admission and bilateral renal artery involvement were major risk factors for AKI before TEVAR. 展开更多
关键词 Acute aortic dissection Kidney injury Renal failure Thoracic endovascular aneurysm repair
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Analysis of 80 Cases of Nasopharyngeal Carcinoma Treated by Intracavitary Brachytherapy Using A New-Type Applicator
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作者 Zhongjie Chen Ruiying Li Ping Wang 《Chinese Journal of Clinical Oncology》 CSCD 2007年第1期52-55,共4页
OBJECTIVE To evaluate the results and complications associated with nasopharyngeal carcinoma (NPC) treated with combined external-beam radiotherapy (EBR) and intracavitary brachytherapy (IB) using a new-type app... OBJECTIVE To evaluate the results and complications associated with nasopharyngeal carcinoma (NPC) treated with combined external-beam radiotherapy (EBR) and intracavitary brachytherapy (IB) using a new-type applicator. METHODS Eighty patients with untreated NPC were divided into two groups based on therapy methods. An experimental group was treated with EBR plus IB and a control group was treated only with EBR. IB was given to the patients of the experimental group when the external radiotherapy dose amounted to more than 60~65 Gy. The total dose of IB was 6~20 Gy and the total dose of EBR of the control group was 70~75 Gy. RESULTS Follow-up was conducted for 97.5% of the patients with re- suits as follows: the overall response rates (ORR) for the experimental and the control groups were 92.5% and 75.3% respectively (P〈0.05); the 3 and 5-year survival rates for the experimental group were 87.5% and 74.2% and for the control group, 65.0% and 55.6% (P〈0.05); for the experimental group, the 3 and 5-year disease-free survival rates were 72.5% and 64.5% and for the control group, 60.0% and 52.8% (P〉0.05).Some complications following radiotherapy showed a significant difference. CONCLUSION External irradiation plus intracavitary brachytherapy using a new-type applicator may improve the ORR and survival rates, reduce radiation complications and increase the quality of life.   展开更多
关键词 nasopharyngeal carcinoma external-beam radiotherapy intracavitary brachytherapy applicator.
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