检索结果-南通市图书馆

Integrated Fault Diagnosis Model Using Tiny Residual Network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrated Fault Diagnosis Model Using Tiny Residual Network

作者： Sa’ad Abdo-Alkawi Ali Hassan Almageedy（青山）华南理工大学

学位级别：硕士

随着制造业的快速发展,使得相关企业对机械设备安全防护系统的需求在不断提高。同时,机械设备的智能故障诊断技术是迈向智能制造的关键过程,也是未来工业发展的趋势。然而,由于现有故障诊断技术的不足,导致需要耗费较大的人工成本来协... 详细信息

随着制造业的快速发展,使得相关企业对机械设备安全防护系统的需求在不断提高。同时,机械设备的智能故障诊断技术是迈向智能制造的关键过程,也是未来工业发展的趋势。然而,由于现有故障诊断技术的不足,导致需要耗费较大的人工成本来协助完成机械设备故障的监测和诊断。针对该问题,深度学习时代的来临让机械设备故障诊断领域步入了迅速发展的轨道,并且引起了学术界和工业界的广泛关注。传统的故障诊断方法需要经过特征提取、特征选择和特征分类的过程,处理过程繁杂并且实际的应用成本高。另外,传统故障诊断方法可能还需要依靠相关领域专业知识的协助和分析,否则将会导致最终诊断结果的不确定性较大。因此,本文基于深度学习技术的思想,结合微小残差网络、时频分析方法和特定的激活函数等技术,提出了一种新的机械故障诊断模型。本文的主要工作内容如下:1.针对传统方法故障诊断过程繁杂并且识别准确率不确定性较大等问题,本文提出了一种基于残差网络的深度卷积神经网络故障诊断模型,简称ITResNet。ITResNet模型采用基于残差网络的设计能够有效克服梯度消失的问题,并且能够直接采用原始故障数据对模型进行训练,从而达到自动识别机械设备故障的目的。2.针对ITResNet模型难以处理原始故障数据噪声污染严重的问题,本文提出采用三种不同的时频分析方法对原始故障进行预处理。时频分析方法能够将原始的一维故障数据通过时频转换,可以转变为二维故障数据。通过结合时频分析技术对ITResNet模型的训练过程进行改进,有效提高了模型对机械故障数据的学习和分类能力。通过实验表明,改进后的ITResNet模型对正常状态和故障状态的数据区分能力更强。3.针对ITResNet模型的分类拟合能力难以达到理想状态的问题,本文基于新的Mish激活函数、Nadam优化器技术和空间金字塔池以及压缩激励结构对ITResNet模型进行了进一步改进,简称ITResNet-SPP-SE。结合这些技术进行改进后,能够有效减少模型的参数数量。通过实验表明,ITResNet-SPP-SE模型的故障分类准确率和稳定性要优于ITResNet模型,并且运行耗时更低。采用轴承故障数据集对本文提出的模型进行了验证和分析。实验结果表明,本文提出的ITResNet模型、采用时频分析方法改进的ITResNet模型和ITRees Net-SPP-SE模型在故障分类准确率方面,分别达到了99.8%,99.99%和99.999%。并且ITRees Net-SPPSE模型的拟合能力比ITResNet模型和改进的ITResNet模型更强。另外,在采用其它方法模型的对比实验方面,传统方法例如SVM、KNN和MLP的预测准确率分别为71%,33%,87%;基于深度学习技术的方法,例如深度完全卷积神经网络（DFCNN）,堆叠降噪自动编码器（SDAE）和自适应卷积神经网络,它们对特定类型的信号进行操作,其准确度分别为99.22%,91.79%和97.90%。因此,可以看出我们提出的集成模型在机械故障分类预测方面表现的更好。

关键词：智能故障诊断卷积神经网络残差网络深度学习旋转机械

Indications for 5-aminosalicylate in inflammatory bowel disease:Is the body of evidence complete?

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第38期12卷 6115-6123页

作者： ad A van Bodegraven Chris JJ Mulder Section of Inflammatory Bowel Diseases VU University medical centre Amsterdam The Netherlands Department of Gastroenterology VU University medical centre Amsterdam The Netherlands

Mesalazine is a safe drug, although adverse events may be seen in a minority of patients. This applies also to pregnant women and children. The role of mesalazine in combination therapy to improve efficacy and con- comitant drug pharmacokinetics, or in chemoprevention against inflammatory bowel disease (IBD)-related co- lonic carcinoma has not yet been completely elucidated. Therapeutic success of mesalazine may be optimized by a combination of high dose and low frequency of dos- age to improve compliance. Therefore, due to its supe- rior safety profile and pharmacokinetic characteristics, mesalazine is preferable to sulphasalazine. This paper reviews the literature concerning mechanisms of action, indications and off-label use, pharmacokinetic properties and formulations, therapeutic efficacy, compliance, pae- diatric indications, chemoprevention, and safety issues and adverse event profile of mesalazine treatment versus sulphasalazine. It also highlights these controversies in order to clarify the potential benefits of mesalazines in IBD therapy and evidence for its use.

关键词： Mesalazine Sulphasalazine Review Ulcerative colitis Crohn's disease Treatment Chemoprevention Pregnancy adverse events

Breast Cancer in Young Women about 87 Cases in the General Surgery Department CHU Gabriel Touré

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Surgical Science 2022年第11期13卷 506-517页

作者： Maïga Amadou Saye Zakari Sidibé Boubacar Yoro Diakité Ibrahima Bah Amadou Diallo Mahamadou Diallo Aly Boubacar Traoré Bathio Moussa Diassana Koné Tani Doumbia Arouna adama Traoré Amadou Diallo Mamadou Traoré Djibril Konaté Moussa Saadé Oumou Hélène Kanté Lassana Konaté Madiassa Dembélé Souleymane Samaké Moussa Keita Mory Dembélé Bakary Tientigui Traoré Alhassane togo adégné Department of General Surgery University Hospital Bamako Mali Department of General Surgery Sikasso Hospital Sikasso Mali Department of Orthopedic Traumatology University Hospital Bamako Mali Department of General Surgery University Hospital Bamako Mali Reference Center of Commune VI Bamako Mali General Surgery Department Mopti Hospital Mopti Mali

Our objectives were to determine the frequency of breast cancer in young women, to determine the risk factors for breast cancer in young women, to detail the diagnostic process of the disease, to determine the different therapeutic strategies. This was a retrospective and descriptive study going from January 2005 to December 2021, a period of 17 years. The study involved 87 women with an average age of 33.2 years. Patients consulted 66 times or 75.9% for breast mass. The size of the tumor was greater than or equal to 5 cm in 62 patients;it was localized in the supero external quadrant 41 times or 47.1%. Molecular classification revealed the following results: Luminal A 21.4%;receptive (HER2) positive 28.6%, and triple negative 42.9%. Stage II was the most represented with 47.4%. Histology found infiltrating carcinoma of non-specific type in 76 patients. The treatment was mastectomy axillary dissection in 66 patients, quadrantectomy + axillary dissection in 6 cases (6.9%) associated with radiotherapy in 6 patients, chemotherapy was performed in 79 of our patients and hormone therapy in 10 patients. Conclusion: Breast cancer is frequent in our country. Patients generally consult us at a late stage. The possibility of determining certain receptors and carrying out certain non-surgical treatments on site would improve the prognosis.

关键词： Breast Cancer Young Woman Receptors Diagnosis Prognosis Mali

Massive Epistaxis Revealing a Post-Traumatic Aneurysm of the Internal Carotid Artery:A Clinical Case and Review of the Literature

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Small hepatocellular carcinoma with ring calcification:A case report and literature review

International Journal of Otolaryngology and Head & Neck Surgery（耳鼻喉） 2024年第2期 120页

作者： Yannick Mossus Maguy Mbede RogerMeva’aBiouélé Leonel Atanga adèle-Rose Ngo Nyeki Pierre Ongolo Zogo François Djomou Alexis Ndjolo

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2013年第1期19卷 129-132页

作者： Takashi Murakami Daisuke Morioka Hideki Takakura Yasuhiko Miura Shinji togo Department of Surgery Yokohama Ekisaikai HospitalYokohamaKanagawa 231-0036Japan

Ring calcification in untreated hepatocellular carcinoma(HCC) is extremely rare,with only 3 previously reported cases in the English-language literature.A case of HCC with ring calcification was reported in this ***,3 previously reported cases of HCC with ring calcification were *** 3 of these 4 cases(including our case),surgery was *** the size of the ring-calcified lesion ranged from 3.0-3.7 cm in previously reported cases,the size was only 1 cm in *** differentiation of the tumor was moderate in the 2 previously reported cases in the histological findings and poor in *** spite of their poor differentiation for their sizes,these tumors showed no early enhancement in dynamic computed *** calcified tumors showed a thick fibrous capsule and extensive necrosis *** calcification was considered to result from a circulatory disturbance caused by the imbalance between the less abundant arterial blood flow and high inner pressure induced by either the thick fibrous capsule or vigorous proliferation due to the poor *** calcification in untreated HCC may suggest a lower differentiation of the *** if its size is small,hepatic resection should be performed for any tumor with ring calcification because poor differentiation is considered to be one of the risk factors for recurrence after local ablation therapy,including radio frequency ablation.

关键词： Hepatocellular carcinoma Ring calcification Calcification in untreated neoplasms Process of forming calcification Histological differentiation

Gastroprotective effect of the aqueous leaf extract of Guiera senegalensis in Albino rats

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2013年第10期6卷 771-775页

作者： Akuodor GC Essien ad David-Oku E Chilaka kC Akpan JL Ezeokpo B Ezeonwumelu JOC Department of Pharmacology College of Medical SciencesUniversity of Calabar Department of Biochemistry of Medical SciencesUniversity of Calabar Department of Pharmacology and Therapeutic College of Health SciencesNnamdi Azikiwe University Department of Pharmacology and Therapeutic Faculty of Clinical MedicineEbonyi State University School of Pharmacy Kampala International University

Objective:To evaluate the effect of aqueous leaf extract of Guiera senegalensis(***)on gastric mucosal damage using different ulcer ***:Considering the above claims,the present study was undertaken to validate the gastroprotective potential of the aqueous leaf extract of this plant against ethanol,water immersion and Aspirin induced ulcer ***:The leaf extract(50,100 and 200 mg/kg,p.o.)significantly(Paditional uses of the plant for the treatment of ulcer.

关键词： Guiera senegalensis Aqueous extract Ethanol Aspirin Stress induced gastric ulcers

Results of Combined Chemotherapy and External Beam Radiotherapy for Unilateral Intra-Orbital Retinoblastoma—A Multi-Institutional Study from Mali

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Pediatrics 2019年第1期9卷 39-46页

作者： Boubacar togo Fousseyni Traore Konimba Diabate Fatou Sylla Aichata Tall Affiatou Simaga Bakarou Kamate Hawa Diall Pierre togo Abdoul Karim Doumbia Pierre Bey Francis Eshun Department of Pediatrics Gabriel Toure HospitalBamakoMali Radiation Therapy Service National Hospital of MaliBamakoMali Institute of Tropical Ophthalmology of Africa(IOTA) BamakoMali Department of Histopathology Hospital of Point GBamakoMali Curie Institute et AMCC ParisFrance Phoenix Children’s Hospital PhoenixAZUSA

Retinoblastoma (RB) treatment aims at saving the life and preserving useful vision. In most low-income countries, because of delays in diagnosis, advanced disease presentation is quite common. This prospective study aimed at evaluating the treatment results of orbital RB with regards to overall survival rate of the patients treated with chemotherapy and radiotherapy. The study was performed from 01 November 2011 to 31 December 2015 in the paediatric oncology unit of Gabriel Touré Teaching Hospital, Bamako, Mali and The Institute of Tropical Ophthalmology of Africa (IOTA), Bamako, Mali. All intra-orbital non-metastatic RB cases not previously treated by chemotherapy or radiotherapy were included in this study. Fourteen patients were included into the study. Median age was 2 years, and sex ratio 2.5 (M = 10;F = 4). Right eye (n = 12, 85.7%) was more often affected than left eye (n = 2;14.3%). Chemotherapy toxicities were mainly haematological including grade 3 anemia (n = 2;7%) and grade 4 neutropenia (n = 3;11%). Twelve patients (86%) were enucleated after neoadjuvant chemotherapy. Two patients (14%) abandoned treatment before enucleation. The IRSS pathology staging was: stage IIIa in 6 patients (50%), and stage II in six patients (50%). Six children (43%) received orbital radiotherapy at total dose of 45 Gy;Six children (43%) achieved complete remission;Overall survival rate was 48% at 4 years (95% CI: 22.5% - 74.4%). In conclusion, the therapeutic strategy based on neoadjuvant chemotherapy followed by enucleation, adjuvant chemotherapy and external beam radiotherapy, was beneficial in patients with stage III disease, achieving an event-free survival rate of 48%.

关键词： Orbital Retinoblastoma Children Mali

Prevalence and correlates of aggressive behavior in psychiatric inpatient populations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2022年第1期12卷 1-23页

作者： Hunor Girasek Vanda adél Nagy Szabolcs Fekete Gabor S Ungvari Gábor Gazdag Department of Psychiatry and Psychiatric Rehabilitation Jahn Ferenc South Pest HospitalBudapest 1204Hungary Department of Psychiatry National Institute of Forensic PsychiatryBudapest 1108Hungary School of PhD Studies Semmelweis UniversityBudapest 1085Hungary Division of Psychiatry School of MedicineUniversity of Western AustraliaCrawley 6009Australia Section of Psychiatry University of Notre DameFremantle 6160Australia Department of Psychiatry and Psychotherapy Faculty of MedicineSemmelweis UniversityBudapest 1083Hungary

Aggressive behavior in patients with psychiatric disorders is attracting increasing research *** reason for this is that psychiatric patients are generally considered more likely to be aggressive,which raises a related question of whether diagnoses of psychiatric disorders predict the prevalence of aggressive *** aggression in psychiatric wards is crucial,because aggressive behavior not only endangers the safety of both patients and staff,but it also extends the hospitalization *** of aggressive behavior also need careful attention to ensure effective treatment *** literature review explores the relationship between aggressive behavior and psychiatric disorders and syndromes(dementia,psychoactive substance use,acute psychotic disorder,schizophrenia,bipolar affective disorder,major depressive disorder,obsessivecompulsive disorder,personality disorders and intellectual disability).The prevalence of aggressive behavior and its underlying risk factors,such as sex,age,comorbid psychiatric disorders,socioeconomic status,and history of aggressive behavior are discussed as these are the components that mostly contribute to the increased risk of aggressive *** tools commonly used to predict and detect aggressive behavior and to differentiate between different forms of aggressive behavior in both research and clinical practice are also *** aggression prevention programs can be developed based on the current findings of the correlates of aggressive behavior in psychiatric patients.

关键词： Aggression Mental disorders Inpatients Prevalence Risk factors Risk assessment

木霉菌株NF9和TC3对芋艿根腐病病原菌的体外拮抗作用

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

浙江农业大学学报 1994年第3期20卷 221-227页

作者：徐同 Tsala,gn 浙江农业大学植物保护系

测定了筛选木霉菌株ＮＦ９和ＴＣ３对喀麦隆芋艿根腐病病原真菌的体外拮抗作用。在对峙培养中，ＮＦ９和ＴＣ３对群结腐霉（Ｐｙｔｈｉｕｍｍｙｒｉｏｔｙｌｕｍ）（Ｐｍ），立枯丝核菌（Ｒｈｉｚｏｃｔｏｎｉａｓｏｌａｎｉ）（Ｒｓ）... 详细信息

测定了筛选木霉菌株ＮＦ９和ＴＣ３对喀麦隆芋艿根腐病病原真菌的体外拮抗作用。在对峙培养中，ＮＦ９和ＴＣ３对群结腐霉（Ｐｙｔｈｉｕｍｍｙｒｉｏｔｙｌｕｍ）（Ｐｍ），立枯丝核菌（Ｒｈｉｚｏｃｔｏｎｉａｓｏｌａｎｉ）（Ｒｓ）和茄镰孢（Ｆｕｓａｒｉｕｍｓｏｌａｎｉ）（Ｆｓ）的拮抗系数分别为１—２，１，１．在赛珞玢分层培养中，ＮＦ９对Ｐｍ，Ｒｓ，Ｆｓ的菌丝生长抑制率分别为１００％，９３．４％及５５．３％；而ＴＣ３对上述真菌的抑制率分别为１００％，９２．１％及４６．４％，光学显微镜下观察到ＮＦ９对Ｒｓ菌丝的缠绕和穿透；在不同温度（１０—３５℃）、不同酸度（ｐＨ３—９）条件下，在ＰＤＡ培养基上，ＮＦ９的菌丝生长均明显超过群结腐霉（Ｐｍ）．当ＰＤＡ培养基中瑞毒霉（Ｒｉｄｏｍｉｌ）的含量为２３ｍｇ／Ｌ及４６ｍｇ／Ｌ时，群结腐霉的生长完全受到抑制，而木霉菌株ＮＦ９和ＴＣ３的生长甚至超过对照（不含瑞毒霉）．实验结果表明了上述木霉菌株在病害防治中的应用潜力。

关键词：木霉菌株拮抗作用芋艿根腐病