DN—A、DN—B井生产阶段环空压力诊断分析

迪那气田属高温、超高压凝析气藏,在开发生产过程中,部分单井,如DN—A、DN—B井,典型地表现出生产套压和技术套压异常的现象,这严重影响着这些井的安全正常生产。当前国内外还没有形成一套针对高温高压气井环空压力诊断分析的方法。结合塔里木油田实际情况,首先分析压力来源并结合API—RP90标准计算各环空的最大许可工作压力;其次密切关注生产动态,及时发现生产出现异常的情况;三是现场通过环空放压手段,结合放出物质的各种性质分析井下管柱的完整性,同时排查井口设备安全隐患,最终得出气井套压出现异常的原因。     

北京地区医用诊断X射线机的现状及其质量控制

本文报道北京地区191台医用诊断 X 射线机的、与影像质量有关的基本参数的测试结果。并对影响这些性能参数的原因进行了分析。结果表明,北京地区现有 X 射线机的性能及运行状况存在着不少问题,为了保证 X 射线影像质量及诊断效果,减少受检者剂量,必须对医用诊断 X 射线机进行质量控制。     

副溶血性弧菌诊断血清的比较

目的比较我国自主生产和进口的副溶血性弧菌诊断血清在检出率、反应强度和特异性等方面的差异。方法使用进口和我国自主生产的诊断血清同时对35株副溶血性弧菌标准菌株和60株临床菌株进行玻片凝集,以检测其血清型。结果对于参考菌株,两者的检出率均为100%,对于临床株,两者的一致率为95%;且两者的特异性均良好。结论我国自主生产的副溶血性弧菌诊断血清性能良好,可以用于副溶血性弧菌分型鉴定。     

基于全域电力大数据的配电网现状自动诊断分析技术研究

本文在考虑地区电网实际的基础上,对配电网生产管理系统、电网调度自动化系统、用户用电信息采集系统、气象信息系统以及全业务数据中心的配电网数据进行深度挖掘,提出了基于CIM的配电线路拓扑结构图重构方法,并提出了对中、低压配电网的现状自动进行诊断分析的具体思路和实施步骤。并针对配电网存在的线路分段过多、网架冗余问题、供电半径过大等主要问题,提出了配电网自动诊断分析的具体方法及实施步骤。并以某市电网进行实例计算分析,列举了配电网现状自动诊断分析结果,获得了与一流配电网目标之间的差距,验证了本文所提出的配电网现状自动诊断分析方法的有效性。     

粗粮细作，以少胜多——武汉协和医院新门诊大楼设计

建筑设计往往会受到资金及用地条件等方面较大的限制。地类问题,结合具体工程进行了一些研究和探索。     

Statistical analysis of mammographic features and its classification using support vector machine

This study aims at designing a support vector machine (SVM)-based classifier for breast cancer detection with higher degree of accuracy. It introduces a best possible training scheme of the features extracted from the mammogram, by first selecting the kernel function and then choosing a suitable training-test partition. Prior to classification, detailed statistical analysis viz., test of significance, density estimation have been performed for identifying discriminating power of the features in between malignant and benign classes. A comparative study has been performed in respect to diagnostic measures viz., confusion matrix, sensitivity and specificity. Here we have considered two data sets from UCI machine learning database having nine and ten dimensional feature spaces for classification. Furthermore, the overall classification accuracy obtained by using the proposed classification strategy is 99.385% for dataset-I and 93.726% for dataset-II, respectively.     

乳腺癌彩色多普勒超声的诊断价值

目的:分析彩色多普勒超声诊断乳腺癌的价值.方法:选择2012年2月至2020年2月期间乳腺癌患者40例作为研究对象,采用随机数字表法将其均分为两组,各20例,分别为对照组和观察组.其中对照组采用常规乳腺癌检测方法,观察组则采用彩色多普勒超声检测方法.观察两组患者检测乳腺癌的准确率.结果:经过检测,观察组检测乳腺癌的准确...     

Screening for principal versus comorbid conditions in psychiatric outpatients with the Psychiatric Diagnostic Screening Questionnaire.

In examining the performance of screening scales, a distinction should be made between principal and additional diagnoses. The Psychiatric Diagnostic Screening Questionnaire (PDSQ) is a brief, psychometrically strong self-report scale designed to screen for the most common Diagnostic and Statistical Manual of Mental Disorders (4th ed.; DSM-IV) Axis I disorders encountered in outpatient mental health settings. In the present report, the authors compared the performance of the PDSQ in identifying principal and comorbid disorders. Seven hundred ninety-nine psychiatric outpatients completed the PDSQ and were interviewed with the Structured Clinical Interview for DSM-IV. The sensitivity and negative predictive values of the PDSQ subscales were similar for principal and additional diagnoses. (PsycINFO Database Record (c) 2010 APA, all rights reserved)