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西门子1CV2252A型电机轴承寿命缩短及失效原因探讨及其对转子扫膛的影响
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作者 许剑 《化工管理》 2024年第30期148-151,共4页
文章首先概述了西门子1CV2252A型电机的基本特性(包括其类型、防护等级以及轴承信息等),随后从电机超速运行、非正常运行环境及环境温度升高等角度,分析了轴承寿命缩短及失效的原因,进一步探讨了轴承失效对转子扫膛的严重影响。在预防... 文章首先概述了西门子1CV2252A型电机的基本特性(包括其类型、防护等级以及轴承信息等),随后从电机超速运行、非正常运行环境及环境温度升高等角度,分析了轴承寿命缩短及失效的原因,进一步探讨了轴承失效对转子扫膛的严重影响。在预防措施方面,文章提出了应定期检查其轴承磨损程度、防止振蚀及关注其润滑脂状态等综合性措施,在改进建议上则强调了应选择高质量的材料与提升其耐疲劳性、优化接触角设计、改进装配工艺等,还详细介绍了基于大数据与物联网的轴承健康监测与预测技术,旨在通过提高设备预测的准确性来提前预警潜在故障,进一步减少设备的停机时间。 展开更多
关键词 西门子1CV2252A型电机轴承 寿命缩短 失效原因 转子扫膛
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横烟检测装置包装机的应用 被引量:2
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作者 丁毅 陈艳 《包装工程》 CAS CSCD 北大核心 2008年第6期96-97,共2页
针对RTS通道中一支横烟的产生不及时剔除将产生大量横烟继而导致烟库缺支,停机剔除影响生产效率的情况,提出在RTS安装横烟检测装置,具体分析横烟检测的设计方法,阐述了其工作原理,并提出了一系列独特的设计思路。
关键词 横烟检测 传感器 PLC cvs1
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基于NI PCI-6221和LabWindows/CVI的高压测试系统设计
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作者 王林涛 陈德荣 窦定波 《工业控制计算机》 2007年第5期10-11,共2页
详细介绍了基于虚拟仪器软件——LabWindows/CVI的高压测试系统(160KV)的设计方案。此方案采用美国国家仪器公司的低成本多用途数据采集卡PCI-6221,实现了对于高电压升降压电路的控制和波形采集和数据存储。同时也详细介绍了数据采集卡... 详细介绍了基于虚拟仪器软件——LabWindows/CVI的高压测试系统(160KV)的设计方案。此方案采用美国国家仪器公司的低成本多用途数据采集卡PCI-6221,实现了对于高电压升降压电路的控制和波形采集和数据存储。同时也详细介绍了数据采集卡接口保护电路的设计,编程环境的使用及软件流程。 展开更多
关键词 LABWINDOWS CV1 PCI-6221 高压测试
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Development of Coastal Vulnerability Index for the Kingdom of Bahrain
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作者 Sabah S. Aljenaid 《Journal of Earth Science and Engineering》 2012年第6期328-336,共9页
The CVI (coastal vulnerability index) was developed and used to assess the vulnerability of the coastline of the Kingdom of Bahrain main islands to future SLR (sea level rise). A total of 717 km of the coastline w... The CVI (coastal vulnerability index) was developed and used to assess the vulnerability of the coastline of the Kingdom of Bahrain main islands to future SLR (sea level rise). A total of 717 km of the coastline was evaluated. Six spatial factors acting on the coastal area: erosion/accretion patterns (shoreline change), topography (elevation above mean sea level), geology, geomorphology, slope, and mean sea level rise were incorporated and ranked to develop the CVI. This index was classified into four levels of vulnerability: low, moderate, high, and very high. Vulnerable hotspots are located along the central portions of the western and eastern coastlines. The vulnerability of these areas is mostly driven by their characteristically shallow coastal slopes, low elevations, and erosion-prone nature of the sandy soils presents, comprising about 54 km of the studied shoreline. Another 33 km of coastline were classified as highly vulnerable and located along the eastern coast. In addition, the western coast of the southern tip of the main island (Bahrain) was also classified as a highly vulnerable shoreline. Twenty-two km was classified as the moderate vulnerable. The remaining coastal areas were classified as low to moderately vulnerable comprising about 608 km of the total length of the coastline. Identifying those hotspots susceptible to SLR is essential for more effective coastal zone management and to help in reducing the impacts of SLR on both infrastructure and human beings. 展开更多
关键词 CV1 (coastal vulnerability index) SLR (sea level rise) vulnerability.
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CLINICAL OBSERVATION ON 60 CASES OF BENIGN HYPERPLASIA OF PROSTATE TREATED BY INJECTION OF "CHUAN-SHEN-TONG" INJECTIOINTO HUIYIN (CV1)
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作者 汪润生 郭小川 《World Journal of Acupuncture-Moxibustion》 2005年第1期19-21,共3页
Objective: To observe the therapeutic e ffect of injection of "Chuan-Shen-Tong" Injectio (川参通注射液) at Huiyin (会阴 CV 1) on benign hyperplasia of prostate . Methods: 60 cases of benign hyperplasia of pr... Objective: To observe the therapeutic e ffect of injection of "Chuan-Shen-Tong" Injectio (川参通注射液) at Huiyin (会阴 CV 1) on benign hyperplasia of prostate . Methods: 60 cases of benign hyperplasia of prostate patients were evenly randomized into treatment group and control group. Those of treatment group were treated with injection o f "Chuan-Shen-Tong" Injectio (composed of Rhizoma Ligustici Chuanxiong, Rad ix Salviae Miltiorrhizae, etc. for relieving hyperplasis of prostate, 4 mL/acupoin t) into Huiyin (CV 1) and the other 60 cases of control group were treated by oral administration of Hytrin (1 mg/d in the 1 st week and increasing 1 mg/3 d, 4 mg at m ost). After 28 days’ treatment, their therapeutic effects were compared. Result s: After treatment, of each 60 cases in treatment and control groups, 11 (18.3%) and 11 (11.7%) were controlled in their symptoms, 25 (41.7%) and 16 (26.7%) had marked improvement, 18 (30.0%) and 17 (28.3%) had improvement, and 6 (10.0%) an d 20 (33.3%) failed, with the effective rate and the markedly effective rate bei ng 90.0% and 66.7% in the treatment group and 66.7% and 38.3% in the control gro up respectively. The therapeutic effect of treatment group was significantly sup erior to that of control group (P<0.01 and P< 0.05). Conclusion: The therapeutic effect of point-injection of "Chuan-Shen-Tong" for benign hyperplasia of p rostate is better than that of oral administration of Hytrin. 展开更多
关键词 Benign hyperplasia of prostate Acupoint-injection thera py Huiyin (CV 1) Hydro-acupunctute
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220MW机组DEH系统VP卡故障分析及应对措施
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作者 梁飞 《锅炉制造》 2022年第1期59-61,共3页
DCS控制系统为西屋公司的OVATION分散控制系统,OVATION分散控制系统通过VP卡控制大机调节门。设备运行中突然出现#1机组连通管调节阀CV1、CV2连通杆阀门突然失控,从开度100%至0%来回快速摆动,中调门失控,低压缸进气突变,影响机组稳定运... DCS控制系统为西屋公司的OVATION分散控制系统,OVATION分散控制系统通过VP卡控制大机调节门。设备运行中突然出现#1机组连通管调节阀CV1、CV2连通杆阀门突然失控,从开度100%至0%来回快速摆动,中调门失控,低压缸进气突变,影响机组稳定运行。针对这一情况,从原理上进行分析,探讨技术方案,为类似问题的解决提供技术参考和借鉴。 展开更多
关键词 VP卡 连通管调节阀CV1、CV2 方案措施
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Effect of catgut implantation at acupoints on GABA_B and mGluR1 expressions in brain stem of rats with spasticity after stroke 被引量:13
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作者 Chengmei Liu Ruiqing Li +1 位作者 Xiaolei Song Xiaodong Feng 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2014年第5期566-571,共6页
OBJECTIVE: To investigate the effect of catgut implantation at acupoints on the expressions of γ-amino butyric acid B receptor(GABAB ) and metabotropic glutamate receptor 1(mGluR1) in the brain stem of rats with spas... OBJECTIVE: To investigate the effect of catgut implantation at acupoints on the expressions of γ-amino butyric acid B receptor(GABAB ) and metabotropic glutamate receptor 1(mGluR1) in the brain stem of rats with spasticity after stroke.METHODS: In total, 60 male Sprague-Dawley rats were randomly divided into three groups: a sham group(n=10), a model group(n=25) and a treatment group(n=25). The rats in both the model group and the treatment group were subjected to middle cerebral artery occlusion to establish a model of focal cerebral ischemia. Rats with limb-spasm met the inclusion criteria. Only the left carotid artery was isolated in sham group rats. Three days after modeling, the treatment group was subjected to catgut implantation at Dazhui(GV 14), Guanyuan(CV 4), and Zhongwan(CV 12). Neurological deficit symptoms were assessed with the Zea-Longa neurological deficit score. The Modified Ashworth Scale(MAS), and isolated muscle tone were used to evaluate spasticity before and after treatment. Immunohistochemistry was applied to determine the expression of GABAB and mGluR1 in the rat brain stem after treatment.RESULTS: After treatment, neural impairment symptoms had significantly improved in the treatment group when compared to the model group(P<0.05). Both MAS and isolated muscle tone in the treatment group were significantly decreased when compared with the model group(P<0.05),and were also lower than before treatment. GABAB expression was significantly higher and mGluR1 was lower in the treatment group when compared with the model group(P<0.01 and P<0.05, respectively).CONCLUSION: Catgut implantation at Dazhui(GV 14), Guanyuan(CV 4), and Zhongwan(CV 12), can relieve limb spasticity by increasing the expression of GABAB and reducing the expression of mGluR1 in the brain stem of rats after stroke. 展开更多
关键词 STROKE Muscle spasticity Embeddingtherapy Point GV 14 (Dazhui) Point CV 4 (Guanyu-an) Point CV 12 (Zhongwan) Metabotropic gluta-mate receptor type 1
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Clinical Study on Acupoint Injection for Treating Chronic Prostatitis
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作者 张时宜 赵粹英 +3 位作者 胡国胜 冯关珍 张英英 洪珏(译) 《Journal of Acupuncture and Tuina Science》 2012年第2期114-116,共3页
By using acupoint injection with antibiotics into Huiyin (CV 1) and the prostate,we treated 122 cases of chronic prostatitis.The report is now given as follows.1 Clinical Data 1.1 Diagnostic criteria The diagnostic ... By using acupoint injection with antibiotics into Huiyin (CV 1) and the prostate,we treated 122 cases of chronic prostatitis.The report is now given as follows.1 Clinical Data 1.1 Diagnostic criteria The diagnostic criteria were referred to the involved studies [1,2].(1) Urgent, 展开更多
关键词 HYDRO-ACUPUNCTURE PROSTATITIS Point Huiyin (CV 1)
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杨树对草木犀的化感作用 被引量:1
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作者 张妍 杨成超 +3 位作者 矫丽曼 刘洋荥 赵大根 侯庚 《林业科技通讯》 2022年第3期44-47,共4页
研究了‘中辽1号’杨(Populus×canadensis cv.‘Zhongliao 1’)叶片、根系、根际土浸提液对草木犀[Melilotus officinalis(Linn.)Pall.]种子萌发的化感效应。研究表明:杨树叶片、根系浸提液对草木犀种子萌发及幼苗生长的化感效应... 研究了‘中辽1号’杨(Populus×canadensis cv.‘Zhongliao 1’)叶片、根系、根际土浸提液对草木犀[Melilotus officinalis(Linn.)Pall.]种子萌发的化感效应。研究表明:杨树叶片、根系浸提液对草木犀种子萌发及幼苗生长的化感效应为负效应,起到了抑制作用,且浓度越大抑制效果越明显,相同浓度的叶片浸提液抑制作用大于根系浸提液的抑制作用;高浓度杨树根际土浸提液对草木犀种子萌发及幼苗生长的化感效应为负,起到了抑制作用,但低浓度杨树根际土浸提液的化感效应为正效应,起到了促进作用。初步认为,杨树林下适宜种植草木犀。 展开更多
关键词 ‘中辽1号’杨 Populus×canadensis cv.‘Zhongliao 1’ 草木犀 Melilotus officinalis(Linn.)Pall. 化感作用
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Crystallity Change of Compressed Poplar Wood Treated by PF Resin
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作者 ZHOU Haibin LIU Junliang JIANG Zehui 《Chinese Forestry Science and Technology》 2006年第1期8-13,共6页
This study investigated the effect of weight percent gain (WPG) and compression set on the crystallity of compressed poplar wood. Tests were conducted to determine the mechanism of compressed wood set. The samples o... This study investigated the effect of weight percent gain (WPG) and compression set on the crystallity of compressed poplar wood. Tests were conducted to determine the mechanism of compressed wood set. The samples of 1-72 Poplar were treated with a PF resin of water-solubility and low molecular weight. Then the air-dried samples were hot-pressed to a certain thickness. Finally the specimens were obtained from the compressed samples and scanned with an X-ray diffractometer. Results show that before press the crystallity of the inner layer is lower than that of the outer layer, and at press the difference of the crystallity between the outer layer and the inner layer will slowly disappear and finally the crystallity of the inner layer exceeds that of the outer layer; with the increasing compression set the crystallity decreases, and there is a big decrease; the crystallity difference between two layers happens because of compression set gradient, WPG difference or the joint effect. 展开更多
关键词 crystallity PF resin plantation forest X-ray diffractometer WPG compression set permanent set Poplar (Poplar euramaricana cv. 1-72)
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不同施肥处理对“宁杞1号”有机枸杞果实产量与品质的影响
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作者 甄伟玲 占玉芳 +1 位作者 鲁艳芳 滕玉芬 《林业科技通讯》 2016年第7期71-74,共4页
本试验以3年生"宁杞1号"(Lycium barbarum L.cv.‘Ningqi-1’)枸杞为试材进行施肥试验,测定了腐熟羊粪(Y)与松针(S)、糠醛(K)、锯末(J)不同组合处理对枸杞鲜果大小、单果鲜质量、单株产量、果实含糖量等指标的影响。结果表明... 本试验以3年生"宁杞1号"(Lycium barbarum L.cv.‘Ningqi-1’)枸杞为试材进行施肥试验,测定了腐熟羊粪(Y)与松针(S)、糠醛(K)、锯末(J)不同组合处理对枸杞鲜果大小、单果鲜质量、单株产量、果实含糖量等指标的影响。结果表明:合理的施肥配比能显著提高枸杞产量和品质;考虑经济效益,单施腐熟羊粪1.5kg效益最优,其次为腐熟羊粪1.0kg+糠醛1.5kg处理,第三为单施腐熟羊粪2.0kg处理。 展开更多
关键词 枸杞 LYCIUM barbarum L.cv.'Ningqi-1’ 施肥处理 产量 品质
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液晶电视大拜年
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作者 杨承钧 《家用电器》 2005年第2期29-33,共5页
液晶电视以轻薄、灵巧赢得消费者的喜爱,二十几英寸的液晶电视尤其适合摆放在卧室收看,不仅时尚,而且能有效地节省卧室的空间。液晶电视或摆放在桌面上,或挂在墙壁上,都各有优点摆放式在变换布局的时候容易调整,随时移动,方便简单;而壁... 液晶电视以轻薄、灵巧赢得消费者的喜爱,二十几英寸的液晶电视尤其适合摆放在卧室收看,不仅时尚,而且能有效地节省卧室的空间。液晶电视或摆放在桌面上,或挂在墙壁上,都各有优点摆放式在变换布局的时候容易调整,随时移动,方便简单;而壁挂式则更加节省空间。但是,在选择电视前,你必须首先确定好是采用摆放式还是采用壁挂式,因为绝大多数的壁挂电视都必须由该电视的专业人员来安装,一旦安装好,就不方便改动位置,如果偏偏要改动,那么就会在墙壁上留下永久的“伤疤”。所以,在购买液晶电视以前,必须首先确定是采用摆放式还是壁挂式。液晶技术发展到今天,已经达到相当成熟的地步。国内各大彩电厂商都不遗余力地开发自己的液晶电视,力图争夺这一片广大的市场。当人们在为着过年的事情而忙活的时候,我们携带着九款最新的26、27英寸的液晶电视来给大家拜年,希望它们中的一款能走进你的家中,为你的生活增添欢乐的色彩! 展开更多
关键词 液晶电视 HaierL29CV6-A1 物理分辨率 数字信号处理
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Intratree Variability of Tensile Strength Parallel to Grain in Chinese Fir and I-214 Poplar from Plantation
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作者 XU Ming REN Haiqing LI Xiazhen 《Chinese Forestry Science and Technology》 2007年第3期40-44,共5页
The variation of tensile strength parallel to grain in Chinese fir and 1-214 poplar wood from plantations was studied in this paper. Aaccording to the national standards The Testing Methods for Physical and Mechanical... The variation of tensile strength parallel to grain in Chinese fir and 1-214 poplar wood from plantations was studied in this paper. Aaccording to the national standards The Testing Methods for Physical and Mechanical Properties of Wood (GB 1927 to 1943 -- 1991), the small clear wood samples were cut and tested, which represent the south and north of trees with heights of 1.3, 3.3, 5.3 and 7.3 m. The results showed: the tensile strength parallel to grain of the north wood was higher than that of south wood. ANOVA shows that the tensile strength parallel to the grain with height is of significant difference (at 0.05 level). 展开更多
关键词 Chinese fir (Cunninghamia lanceolata) 1-214 poplar (Populus × euramericana cv. tensile strength PARALLEL VARIABILITY
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