期刊文献+
共找到11篇文章
< 1 >
每页显示 20 50 100
塑料齿轮缩腰的机理分析及解决方法 被引量:4
1
作者 沈亚强 辛栋 +2 位作者 赵凯 陆志强 曹伟 《模具工业》 2019年第2期1-5,共5页
以某塑料齿轮为例,利用Moldflow分析塑料齿轮产生缩腰的机理,提出采用鼓形电极加工模具型腔板以消除塑料齿轮缩腰的现象,并详细介绍了塑料齿轮的成型方法,实际生产表明该方法有效解决了塑料齿轮成型中的缩腰问题。
关键词 塑料齿轮 缩腰 鼓形 电火花加工 翘曲变形
下载PDF
“缩腰型”配风方式在燃煤调整中的应用
2
作者 赵思安 李侠 《华北电力技术》 CAS 2006年第9期26-28,共3页
分析了“缩腰型”配风缓解超温和减小汽温偏差的机理,通过实例分析证明了此种调整方式的有效性,为解决机组超温和汽温偏差提供了思路,可以帮助人们更好地理解二次风在炉中燃烧中的作用。
关键词 缩腰型”配风 超温 汽温偏差 二次风 燃烧调整
下载PDF
轧机机架窗口缩腰现象分析与处理
3
作者 严辉容 《机械设计与研究》 CSCD 北大核心 2015年第2期151-154,共4页
中厚板带轧机机架在制造及使用过程中,机架窗口常出现"缩腰"等变形现象,文章在理论分析的基础上,采用三维有限元分析与现场实测相结合的方法,对窗口"缩腰"变形进行定量、定性分析,确定"缩腰"变形量的影... 中厚板带轧机机架在制造及使用过程中,机架窗口常出现"缩腰"等变形现象,文章在理论分析的基础上,采用三维有限元分析与现场实测相结合的方法,对窗口"缩腰"变形进行定量、定性分析,确定"缩腰"变形量的影响因素,并提出相应技术措施,效果显著。 展开更多
关键词 机架窗口 缩腰 挠度 有限元 应变实测
原文传递
枣干腰缩果病症状类型及侵染规律研究 被引量:8
4
作者 郑晓莲 赵光耀 +2 位作者 齐秋锁 侯桂兰 李萍 《植物保护》 CAS CSCD 北大核心 1998年第4期17-19,共3页
试验明确枣干腰缩果病在田间呈现3种症状类型,即干腰型、干肩型和干蒂型。对上述3种症状的病果分离结果表明其病原种类没有明显差别,都以真菌为主,其中细交链孢菌比例最大。从开花期至采收前,每隔10d采样分离表明,病菌从花期... 试验明确枣干腰缩果病在田间呈现3种症状类型,即干腰型、干肩型和干蒂型。对上述3种症状的病果分离结果表明其病原种类没有明显差别,都以真菌为主,其中细交链孢菌比例最大。从开花期至采收前,每隔10d采样分离表明,病菌从花期至收果前均可造成侵染。 展开更多
关键词 枣干果病 症状 侵染规律
下载PDF
中厚板轧机牌坊窗口变形问题的分析 被引量:2
5
作者 王晓阜 梁军 《重型机械科技》 2006年第3期5-6,共2页
对多年来二重在中厚板轧机制造装配过程中收集的数据进行统计分析,并结合牌坊受力、支持力对牌坊立柱作用产生的弯矩及弯矩使立柱产生挠度等进行论证,剖析轧机牌坊立装后产生“缩腰”的原因,给设计工作提出了相关的建议。
关键词 牌坊 挠度 弯矩 缩腰
下载PDF
高弹纬平针织物拉伸夹持方式研究及测量分析
6
作者 刘兵 孙凡平 袁嫣红 《针织工业》 北大核心 2021年第7期80-83,共4页
针对高弹类织物在拉伸过程中易产生卷边的现象,设计一种可消除卷边的织物拉伸夹持方式;并以纬平针弹性织物为试样,测试分析两种夹持方式下的拉伸应力应变曲线。测试结果表明,新的夹持方法,能有效消除织物卷边的影响,且不会对织物正常的... 针对高弹类织物在拉伸过程中易产生卷边的现象,设计一种可消除卷边的织物拉伸夹持方式;并以纬平针弹性织物为试样,测试分析两种夹持方式下的拉伸应力应变曲线。测试结果表明,新的夹持方法,能有效消除织物卷边的影响,且不会对织物正常的缩腰形变产生干涉;测得高弹纬平针织物拉伸过程中的线圈基本不产生滑移,且应力应变特性接近线性状态,线性结果可以简化高弹针织物力学模型的建立。 展开更多
关键词 高弹织物 卷边 拉伸夹持方式 纬平针 缩腰
下载PDF
致密度测量在提高产品质量中的应用 被引量:1
7
作者 郑峥嵘 《陶瓷》 CAS 2001年第1期39-39,共1页
关键词 陶瓷坯体 致密度 测量 产品质量 针孔 缩腰
下载PDF
四辊轧机机架窗口变形分析
8
作者 王维国 贾占友 《一重技术》 2012年第6期66-68,共3页
结合现场安装实例对四辊轧机(这里指中厚板轧机和宽带轧机)机架精加工完成后,在机架立装时窗口产生的变形问题(即"缩腰问题")进行分析。主要探讨底板对机架支持力产生的弯矩和入、出口工作辊道辊道架在机架立柱上的作用力对... 结合现场安装实例对四辊轧机(这里指中厚板轧机和宽带轧机)机架精加工完成后,在机架立装时窗口产生的变形问题(即"缩腰问题")进行分析。主要探讨底板对机架支持力产生的弯矩和入、出口工作辊道辊道架在机架立柱上的作用力对机架窗口的影响。 展开更多
关键词 四辊轧机 机架 缩腰 挠度 有限元
下载PDF
Clinical observation on electroacupuncture plus hydro-acupuncture for low back pain caused by compression fractures 被引量:1
9
作者 Yang Feng-xiang Zhou Fang +1 位作者 Wang Cheng-xiu Guo Li-hong 《Journal of Acupuncture and Tuina Science》 CSCD 2018年第3期180-184,共5页
Objective: To observe the effect of electroacupuncture (EA) at Jiaji (EX-B 2) points plus hydro-acupuncture with sinomenine hydrochloride for low back pain caused by compression fractures in the elderly. Methods... Objective: To observe the effect of electroacupuncture (EA) at Jiaji (EX-B 2) points plus hydro-acupuncture with sinomenine hydrochloride for low back pain caused by compression fractures in the elderly. Methods: Ninety-five elderly in-patients with low back pain caused by compression fractures were randomly divided into an observation group and an EA group according to the visit sequence. Both groups received the same basic treatment. In the EA group, 48 cases were treated with EA at Jiaji (EX-B 2) points plus the basic therapy; 47 cases in the observation group received the basic treatment plus EA and hydro-acupuncture with sinomenine hydrochloride at Jiaji (EX-B 2) points. The levels of osteoprotegerin (OPG) and interleukin-1β(IL-1β) in peripheral blood were measured by enzyme-linked immunosorbent assay (ELISA) before and at the 21st day of treatment in both groups. Oswestry disability index (ODI) and visual analog scale (VAS) scores were used to analyze the clinical efficacy. Results: After treatment, the OPG content in the observation group was higher with statistical significance compared with that before treatment in the observation group and after the treatment in the EA group, respectively (both P〈0.05); the content of IL-1β, ODI and VAS scores were lower than those before treatment in the observation group and after treatment in the EA group with statistical significances (all P〈0.05). Conclusion: The combination of EA and hydro-acupuncture with sinomenine hydrochloride at Jiaji (EX-B 2) points is effective for low back pain caused by compression fractures in the elderly, and is superior to EA at Jiaji (EX-B 2) points alone. 展开更多
关键词 Acupuncture Therapy ELECTROACUPUNCTURE HYDRO-ACUPUNCTURE Low Back Pain Point Jiaji (EX-B 2) FRACTURES Compression Lumbar Vertebrae Pain Measurement
原文传递
Therapeutic observation on point-toward-point needling at points on the low back regions for residual back pain after percutaneous kyphoplasty 被引量:6
10
作者 Chen Shan-shan 《Journal of Acupuncture and Tuina Science》 CSCD 2019年第2期131-136,共6页
Objective: To observe the effect of point-toward-point needling at points on the low back regions on residual back pain after percutaneous kyphoplasty (PKP), thoracolumbar function and quality of life (QOL) in patient... Objective: To observe the effect of point-toward-point needling at points on the low back regions on residual back pain after percutaneous kyphoplasty (PKP), thoracolumbar function and quality of life (QOL) in patients with osteoporotic vertebral compression fracture (OVCF). Methods: A total of 72 patie nts with OVCF and residual back pain after PKP were in eluded and allocated into a treatme nt group (n=36) and a control group (n=36) by the random number table. Cases in the control group received salmon calcitonin injection (miacalcic), for 1 mL each time, once a day, and oral intake of calcium carbonate D3 pill, 600 mg each time, once a day, whereas cases in the treatment group received point-toward-point needling at points on the low back regions and electroacupuneture (EA) for 30 min each time, once a day and 6 times a week on the basis of the treatment in the control group. Treatment in both groups lasted for 2 weeks. Therapeutic efficacy indicators including visual analog scale (VAS), Oswestry disability index (ODI) and Barthel index (Bl) were evaluated before and after treatment and at follow-up visit (1 month after treatment). Results: The total effective rate was 94.4% and 88.9% in the treatment group after treatment and at the follow-up visit, respectively, higher than 77.8% and 69.4% in the control group, and the between-group differences were statistically significant (both P<0.05). After treatment and at the follow-up visit, the VAS and ODI scores decreased, and Bl scores in creased in both groups, and the in tra-group differe nces were statistically sign ifica nt (all P<0.05). After treatme nt and at the follow-up visit, between-group differences of VAS, ODI and Bl scores were statistically significant (all P<0.05). Conclusion: On the basis of conventional medication treatment, point-toward-point needling at points on the low back regions has a good therapeutic effect in relieving residual back pain after PKR improving thoracolumbar function and QOL, better than conventional medication treatment alone. 展开更多
关键词 Acupuncture Therapy Point-toward-point Method ELECTROACUPUNCTURE Fractures Compression OSTEOPOROSIS Low Back Pain Pain Measurement Visual Analog Scale
原文传递
Treatment of osteoporotic compression fracture of thoracic/lumbar vertebrae by kyphoplasty with SKY bone expander system 被引量:14
11
作者 熊健 党育 +2 位作者 姜保国 付中国 张殿英 《Chinese Journal of Traumatology》 CAS 2010年第5期270-274,共5页
Objective: To investigate prospectively the effectiveness ofkyphoplasty with SKY bone expander system in treatment of compression fracture of thoracic/ lumbar vertebrae and correction of the deformity. Methods: Twe... Objective: To investigate prospectively the effectiveness ofkyphoplasty with SKY bone expander system in treatment of compression fracture of thoracic/ lumbar vertebrae and correction of the deformity. Methods: Twenty-five patients with thoracic/lumbar vertebral osteoporotic compression fracture were admitted to our hospital between March 2007 and March 2008, and treated by kyphoplasty with SKY bone expander system. Patient's pain status was rated with Visual Analogue Scale (VAS) score system 1 day before and 1 hour, 48 hours, 6 months, 12 months after surgery. In addition, Rolland-Mor- ris and Oswestry disability questionnaires (RDQ and ODI) were used for survey 1 day before and 1, 6, 12 months after surgery. Pre- and post-operative vertebral heights and Cobb's angles were measured based on the X-ray films and statistically analyzed. Results: There were 27 fractured vertebrae in these 25 patients. After SKY kyphoplasty, the Cobb's angles (9.8°±9.76°) were significantly reduced compared with preoperative angles (17.18°±9.35°, P〈0.05), and the average improve- ment rate was 39%. Patients' pain VAS scores were also greatly improved after operation (P〈0.05). Moreover, postoperative RDQ and ODI scores were significantly smaller than preoperative values (P〈0.05). Conclusions: Kyphoplasty with SKY bone expander system provides an effective method for treating thoracic/ lumbar vertebral osteoporotic compression fracture, with the advantages of small surgical wound and short duration. It can effectively recover the anterior and medial heights of fractured vertebrae (33% and 50%, respectively), reduce the Cobb's angle, quickly alleviate pain and improve patients' quality of life in a relatively short time period. 展开更多
关键词 Fractures bone Thoracic vertebrae Lumbar vertebrae VERTEBROPLASTY Pain Osteoporosis
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部