基于IAS的制丝集控系统

济南卷烟厂制丝车间在异地迁建过程中,利用PROFINET技术建立起制丝线工控网络,并就PROFINET的优点及其在三层交换中的应用进行了阐述。     

基于形态梯度变换和改进支持向量机的多普勒雷达天线机械故障诊断方法

提出了基于形态梯度变换和改进支持向量机的多普勒雷达天线机械故障诊断方法。首先基于数学形态梯度对雷达天线机械故障信号进行滤波,消除噪声因素的影响。然后,针对现有支持向量机投票策略在构造多类分类器的过程中存在的部分区域不可分的问题,提出基于Beta映射关系函数的贝叶斯优化投票策略支持向量机模型,建立基于Beta映射关系函数的贝叶斯先验分布和后验分布之间的联系,对后验分布进行精确的估计,实现对不可分区域数据的有效分类。通过对采集到的某型号多普勒雷达天线的轴承故障信号的有效分类,表明了本文所提方法的准确性。     

浅析核电站继电保护系统状态诊断和可靠性技术

为提高核电站中继电保护系统的安全可靠性,分析了继电保护系统故障原因;重点介绍了一种新的继电保护系统状态检测与故障诊断技术．阐述了该系统的优点、基本原理、诊断过程等内容;最后提出了提高继电系统安全可靠性的主要策略。     

妇科常见急腹症的超声诊断

论述了妇科常见的急腹症的超声图像表现，认为B型超声检查在妇科急腹症诊断中，具有快速、简便，结果可靠等特点，强调了采用经阴道与经腹方式联合检测的重要性，同时指出，超声图像是非特异的，必须密切结合临床症状、体格检查及其它资料做综合分析，才能进一步提高诊断准确率．     

豚鼠沙门氏菌病的诊断

从腹泻豚鼠体内分离到一株革兰氏阴性短小杆菌 ,经生化试验 ,凝集试验等鉴定为肠炎沙门氏菌     

Values of endoscopic ultrasonography for diagnosis and treatment of duodenal protruding lesions

Objective： The diagnoses of patients with duodenal protruding lesions are difficult when using conventional examinations such as computed tomography （CT） and conventional endoscope etc. Thus, we investigated the clinical value of endoscopic ultrasonography （PUS） with miniature ultrasonic probes on the diagnosis and treatment of duodenal protruding lesions. Methods： Patients with duodenal protruding lesions who were indicated for PUS were examined by PUS with 12-15 MHz miniature ultrasonic probes and double-cavity electronic endoscope. According to diagnosis of PUS, those patients were indicated for biopsy and treatment received biopsy, endoscopic resection or surgical excision. The postoperative histological results were compared with the preoperative diagnosis of PUS. Those patients without endoscopic resection or surgical excision were periodically followed up with PUS. Results： A total of 169 patients with duodenal protruding lesions were examined by PUS, of which 40 were diagnosed with cysts, 36 with inflammatory protruding or polyp, 25 with Brunner＇s gland adenoma, 19 with ectopic pancreas, 17 with gastrointestinal stromal tumor, 12 with extrinsic compression, 12 with minor papilla, 6 with lipoma, 1 with adenocarcinoma and 1 with lymphoma. After PUS examinations, 75 patients received biopsy, endoscopic resection or surgical excision respectively. The postoperative histological results of 70 patients were completely consistent with the preoperative diagnosis of PUS, with 93.33% diagnostic accuracy. The results of follow-up with PUS indicated that duodenal cyst, Brunner＇s gland adenoma, ectopic pancreas, gastrointestinal stromal tumor and lipoma remained unchanged within 1-3 years. No related complications occurred among all patients that received PUS examinations. Conclusion： PUS is an effective and reliable diagnostic method for duodenal protruding lesions.     

Creep damage characterization of Ni-based superalloy by acoustic nonlinearity

The creep damage of Ni-based superalloy has been experimentally investigated by acoustic nonlinearity measured by the finite amplitude method. The creep test is conducted and interrupted after a specified fraction of creep life time. The cuboidal g0 precipitates coarsen preferentially in the direction perpendicular to the applied stress axis. The aspect ratio (a/b) of the g0 precipitate increases monotonously with creep duration. The increase in acoustic nonlinearity is discussed in relation to the directional coarsening of the g0 precipitates, which proves to be closely related to the scattering and distortion of the ultrasonic waves. We have determined that acoustic nonlinearity is a potential diagnostic method for determining creep damage in Ni-based superalloys.     

羊肠毒血症的诊断与综合防治

对通辽市某农场放牧点绵羊出现急性死亡现象，经病理剖检、细菌学检查、病原分离培养、动物致病性试验、生化试验和中和试验，确诊为羊肠毒血症，并提出综合防治措施．     

复杂系统的诊断问题求解——一种基于知识的方法

本文提出了复杂系统的诊断问题求解的一般性概念并深化了文献[1]中的结论,即得到了更为有效的诊断策略与具体诊断方法,最后提出了一个基于知识的汽车发动机诊断系统。     

线性模拟电路故障诊断的分组诊断法

本文将故障验证技术中的伪电路法和支路诊断法结合起来,提出了线性模拟电路故障诊断的分组诊断法。它将故障网络的电路元件分成“好”的组1,和“坏”的组2,导出支路故障诊断方程和允许分组的拓扑条件。该方法还可应用于非线性两端电阻网络的故障诊断。分组诊断法具有如下特点:诊断方程阶数低;特别是不必穷举各种分组的组合,同时又使允许分组的检验不必通过任何运算而可在电路图上直接进行;在诊断中结合耦合表调整分组,可加快诊断速度,减小计算量。