On nonlinear systems diagnosis using differential and algebraic methods

In this paper we tackle the diagnosis problem in nonlinear systems under failure using differential algebra. Three examples are presented in order to apply the proposed methodology. Numerical simulations of these examples are presented to illustrate the effectiveness of the suggested approach.     

Patterns of maltreatment and diagnosis across levels of care in group homes

Patterns of Axis I psychiatric diagnosis and maltreatment history were explored among youth in group homes, including match of clinical need to level or restrictiveness of care. Data on demographics, diagnoses, maltreatment, and group home level of care (Level I, II, or III homes, representing lower to higher intensity of supervision and treatment) were obtained from 523 youth who participated in a quasi-experimental study of group homes. Three quarters of youth had a diagnosis and two-thirds of youth had a maltreatment history. Youth in higher level homes had more diagnoses and higher rates of all disorders except adjustment disorders. Youth in Level I homes had a history of more maltreatment types, particularly high rates of neglect. Sexual abuse, physical abuse, and emotional abuse were most common among youth in higher level homes. Regardless of diagnosis history, comparable proportions of youth had a maltreatment history, and similar patterns were found across levels of care. Together, findings indicate that group homes with varying degrees of restrictiveness serve youth with different psychiatric diagnosis and maltreatment histories. Youth triaged to higher level homes had more diagnoses, while youth placed in the least restrictive homes had a history of more maltreatment subtypes. Further, distinct patterns of diagnosis types and maltreatment subtypes were seen across homes. Implications include the importance of assessing unique clinical needs of youth to promote an appropriate match to level of care and treatment plan.     

强迫症的诊断研究综述

文章对于强迫症从诊断,鉴别诊断和共病研究的新进展进行了综述,并进一步比较了国内外三个诊断标准对强迫症的诊断不同之处。     

用于控制系统故障诊断的神经网络和专家系统

本文介绍了神经网络和专家系统在控制系统故障诊断中的应用，并讨论了神经网络和专家系统相结合的一种预处理结合故障诊断方法。     

Diagnostic value of optic disc retinal nerve fiber layer thickness for diabetic peripheral neuropathy

Journal of Zhejiang University-SCIENCE B - To investigate the value of optic disc retinal nerve fiber layer (RNFL) thickness in the diagnosis of diabetic peripheral neuropathy (DPN). Ninety...     

血细胞形态学检查诊断深部真菌感染探讨

目的:探讨血细胞形态学变化对深部真菌感染的诊断价值;方法:常规方法对深部真菌感染患者的外周血和骨髓进行血细胞形态学检查;结果:发现粒细胞系统反应性增生,并有较特异的形态学改变。主要为中性粒细胞的颗粒增多和空泡变性;结论:血细胞形态学变化对深部真菌感染具有提示性诊断价值。结合患者的临床资料,可对深部真菌感染作出初步诊断。     

案例教学法在《电气系统检测与故障诊断》课程中的应用探讨

案例教学法是一种行之有效的启发探究式教学方法。本文详细阐述了案例教学法的内涵和作用,着重探讨了案例教学法在《电气系统检测与故障诊断》课程教学实践中的应用。教学实践表明:案例教学法可以很好地激发学员学习的主动性,提高学员的逻辑思维能力、独立分析问题和解决问题的能力。     

Serum protein fingerprinting coupled with artificial neural network distinguishes glioma from healthy population or brain benign tumor

To screen and evaluate protein biomarkers for the detection of gliomas (Astrocytoma grade Ⅰ-Ⅳ) from healthy individuals and gliomas from brain benign tumors by using surface enhanced laser desorption/ionization time of flight mass spectrometry (SELDI-TOF-MS) coupled with an artificial neural network (ANN) algorithm. SELDI-TOF-MS protein fingerprinting of serum from 105 brain tumor patients and healthy individuals, included 28 patients with glioma (Astrocytoma Ⅰ-Ⅳ), 37 patients with brain benign tumor, and 40 age-matched healthy individuals. Two thirds of the total samples of every compared pair as training set were used to set up discriminating patterns, and one third of total samples of every compared pair as test set were used to cross-validate; simultaneously, discriminate-cluster analysis derived SPSS 10.0 software was used to compare Astrocytoma grade Ⅰ-Ⅱ with grade Ⅲ-Ⅳ ones. An accuracy of 95.7%, sensitivity of 88.9%, specificity of 100%, positive predictive value of 90% and negative predictive value of 100% were obtained in a blinded test set comparing gliomas patients with healthy individuals; an accuracy of 86.4%, sensitivity of 88.9%, specificity of 84.6%, positive predictive value of 90% and negative predictive value of 85.7% were obtained when patient's gliomas was compared with benign brain tumor. Total accuracy of 85.7%, accuracy of grade Ⅰ-Ⅱ Astrocytoma was 86.7%, accuracy ofⅢ-Ⅳ Astrocytoma was 84.6% were obtained when grade Ⅰ-Ⅱ Astrocytoma was compared with grade Ⅲ-Ⅳ ones (discriminant analysis). SELDI-TOF-MS combined with bioinformatics tools, could greatly facilitate the discovery of better biomarkers. The high sensitivity and specificity achieved by the use of selected biomarkers showed great potential application for the discrimination of gliomas patients from healthy individuals and glioma from brain benign tumors.     

高中学业水平考试研究(三):学业评价和质量问题诊断

学业评价和质量问题诊断的主要目的是要报告被评价者在评价内容上达到的水平,并指出其在被评价内容上的问题及进一步努力的方向。建立学业评价和质量问题诊断系统需要考虑的主要要素包括评价对象、评价内容、评价要素、评价技术和评价结果。本文在讨论这些要素的基础上,重点讨论了评价的技术问题,以实例指出在我国当前教育评价文化背景下,向被评价对象报告学业水平及其分布以及学业方面存在的问题,应当作为主要的评价结果。     

Case Report:Diagnosis and treatment of pheochromocytoma in urinary bladder

Objective: To study the diagnosis and treatment of pheochromocytoma in urinary bladder. Methods: Six cases of bladder pheochromocytoma were studied. Four cases showed hypertension, 3 of which were paroxysmal hypertension during urination. Catecholamine (CA) was increased in a case, and vanillymandelic acid (VMA) was increased in 2 cases. Bladder sub- mucosal mass was detected by B-ultrasound in 5 cases (5/5), computerized tomography (CT) in 3 cases (3/3), cystoscopy in 5 cases (5/6). Four cases took α-receptor blocker for 2 weeks, 1 case took β-receptor blocker to decrease heart rate. All patients were treated with surgical operation including 4 partial cystectomies, 2 excavations. Results: Three cases had manifestations including headache, excessive perspiration and hypertension during cystoscopy. Four cases were confirmed before operation. Two cases showed hypertension during operation. All patients were pathologically diagnosed as pheochromocytoma post- operatively. In five cases followed up, blood pressure returned to normal. No patient had relapse and malignancy. Conclusions: Typical hypertension during urination comprised the main symptoms. We should highly suspect bladder pheochromocytoma if a submucosal mass was discovered with B-ultrasound, CT, 131I-MIBG (methyliodobenzylguanidine) and cystoscopy. The deter- mination of CA in urine is valuable for qualitative diagnosis. The preoperative management of controlling blood pressure and expansion of the blood volume are very important. Surgical operation is a good method for effective treatment. Postoperative long-time followed up is necessary.