电控发动机故障诊断技术

介绍电控发动机故障诊断技术,常见故障诊断方法与技巧。     

DETECTION OF STRAND BREAKS OF DNA IN HUMAN EARLY CHORIONIC VILLUS CELLS INDUCED BY DIAGNOSTIC ULTRASOUND USING ^32P-LABELED ALU HYBRIDIZATION

Genetic effects of ultrasound on fetus havebeen extensively studied since ultrasonograph waswidely appliedin obstetric practice.In recent years,there have been reports onin vivomolecular geneticeffects of diagnostic ultrasound[1-4].In vitroexperi-ments have found that single-stranded breaks(ssbs)and double-stranded breaks(dsbs)in DNA are themain indices for DNA lesions induced by ultra-sound[5].But,no reports on whether ultrasound cancausein vivossbs and dsbs in DNAare available.Tofurther …     

贯入法检测砌筑砂浆的强度

贯人法检测仪器由贯人仪、贯人深度测量表、测钉及测钉量规组成。检测时，用摇柄旋转贯人仪的负载铜螺母，逐渐压缩工作弹簧，直到挂钩棘爪锁住贯人杆为止，此时贯人杆受力；将负载铜螺母退至贯人杆最顶端，使贯人仪的扁头对准灰缝中部，拉起扳手，释放工作弹簧，测钉即可迅速地贯人砂浆内。     

工程车常见液压故障的快速诊断与维修

从常见的液压系统故障压力低、噪声大、液压缸工作迟缓分析入手,采取逐层深入的办法,查找并排除液压系统内部故障.     

超声诊断无功能肾上腺肿瘤34例

随着医学影像学的发展 ,无功能肾上腺肿瘤的检出率逐渐增多。本文对我院 1990～ 2 0 0 1年经手术及病理证实的 34例无功能肾上腺肿瘤的超声检查结果总结分析如下。1　资料和方法1.1　临床资料　 34例无功能肾上腺肿瘤患者 ,均经手术及病理证实 ,其中男性 16例 ,女性 18例 ;年龄 5～ 72岁。左侧 11例 ,右侧 2 3例 ,均为单发。临床无任何肾上腺内分泌功能异常引起的症状 ,实验室检查内分泌功能无异常。1.2　方法　仪器为Ｄｉｓｏｎｉｃｓ公司的Ｓｐｅｃｔｒａ及惠普公司生产的ＨＰ 5 5 0 0。探头频率 3.5ＭＨｚ。检查时 ,患者取侧卧位或仰卧位…     

肝段下腔静脉梗阻的CDFI诊断价值

肝段下腔静脉梗阻 (ｂｕｄｄ ｃｈｉａｒｉＳｙｎｄｒｏｍｅ ,ＢＣＳ)是由于肝静脉或肝段下腔静脉梗阻导致肝静脉流出道受阻而引起的综合征。先天性梗阻常为隔膜型 ,或由栓塞而致下腔静脉闭塞。确诊主要依靠血管造影。随着彩色多普勒血流显像 (ｃｏｌｏｕｒＤｏｐｐｌｅｒｆｌｏｗｉｍａｇｉｎｇ ,ＣＤＦＩ)的广泛应用 ,极大丰富了对本病的检查手段。本文旨在探讨ＣＤＦＩ检查对ＢＣＳ的诊断价值。1　资料和方法1.1　临床资料　 1993年 9月至 2 0 0 0年 12月我院收治的ＢＣＳ患者 2 0例 ,男 13例 ,女 7例 ,年龄 12～ 6 7岁 ,平均35 .8岁。其…     

汽车故障诊断技术简论

简要论述了汽车故障诊断的基本原理和诊断方法。     

THE STUDY OF MICROSATELLITES ALTERATION IN DIAGNOSES OF BLADDER CANCER

Objective To investigate the possibility of microsatellite alteration （MA） in diagnosis of bladder cancer of Chinese people, and find the better panel which will be used in clinic. Methods A total of 6 and 10 microsatellite markers were chosen, PCR-SSLP silver staining assay was performed in 31 and 32 bladder cancers tissue, exfoliate cells in urine and 10, 15 non-bladder cancers exfoliate cells in urine, respectively. Results MA （＋） was found in 28 out of 31, 30 out of 32 bladder cancers, and the sensitivity was 90. 3%, 93.7% respectively. The MA of urine sediment of 25 non-bladder cancers was negative, and the specificity was 100%. The cytology was carried out among 19 out of 31, 20 out of 32 bladder cancers at the same time, 2 cases （10.3%） and 3 cases （15%） were found cancer positive, and the sensitivity is significantly lower than that by the analysis of MA in exfoliated cells. Conclusion MA was not associated with grade and stage of the bladder cancer. MA assay is a sensitive and effective method for the early detection of bladder cancer and post-operation surveillance.