检索结果-南通市图书馆

Unsupervised Electric Motor Fault Detection by Using Deep Autoencoders

IEEE/CAA Journal of Automatica Sinica 2019年第2期6卷 441-451页

作者： Emanuele principi Damiano Rossetti Stefano Squartini Francesco Piazza the Department of Information Engineering Università Politecnica delle Marche Loccioni Group Angeli di Rosora IEEE

Fault diagnosis of electric motors is a fundamental task for production line testing, and it is usually performed by experienced human operators. In the recent years, several methods have been proposed in the literature for detecting faults automatically. Deep neural networks have been successfully employed for this task, but, up to the authors' knowledge, they have never been used in an unsupervised scenario. This paper proposes an unsupervised method for diagnosing faults of electric motors by using a novelty detection approach based on deep autoencoders. In the proposed method, vibration signals are acquired by using accelerometers and processed to extract LogMel coefficients as features. Autoencoders are trained by using normal data only, i.e., data that do not contain faults. Three different autoencoders architectures have been evaluated: the multilayer perceptron(MLP) autoencoder, the convolutional neural network autoencoder, and the recurrent autoencoder composed of long short-term memory(LSTM) units. The experiments have been conducted by using a dataset created by the authors, and the proposed approaches have been compared to the one-class support vector machine(OC-SVM) algorithm. The performance has been evaluated in terms area under curve(AUC) of the receiver operating characteristic curve, and the results showed that all the autoencoder-based approaches outperform the OCSVM algorithm. Moreover, the MLP autoencoder is the most performing architecture, achieving an AUC equal to 99.11 %.

关键词： Autoencoder convolutional neural networks electric motor fault detection long short-term memory neural networks novelty detection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

How antibiotic resistances could change Helicobacter pylori treatment:A matter of geography?

引用

World Journal of Gastroenterology 2013年第45期19卷 8168-8180页

作者： Enzo Ierardi Floriana Giorgio Giuseppe Losurdo Alfredo Di Leo ma.ia.ea.rice principi Division of Gastroenterology Department of Emergency and Organ Transplantation 70124 Bari Italy

Therapeutic management of Helicobacter pylori(***)remains an unsolved ***,no therapeutic regimen is able to cure the infection in all treated patients,and in many the infection persists despite the administration of several consecutive standard *** antibiotic resistance reports describe alarming results,the outcome of therapeutic regimens does not seem to parallel this scenario in most cases,since a successful performance is often reached in more than 80%of ***,the phenomenon of increasing antibiotic resistance is being closely studied,and the results show controversial aspects even in the same geographic *** the continents of Europe,America,Asia,Africa,and Oceania,minimal and maximal values of resistance to the main antibiotics(clarithromycin,amoxicillin,metronidazole,and levofloxacin)feature wide ranges in different *** real enigma is therefore linked to the several different therapeutic regimens,which show results that often do not parallel the in vitro findings even in the same areas.A first aspect to be emphasized is that some regimens are limited by their use in very small geographic ***,not all therapeutic trials have considered bacterial and host factors affecting the therapeutic *** additional use of probiotics may help to reduce adverse events,but their therapeutic impact is *** conclusion,the"ideal therapy",paradoxically,appears to be a"utopia",despite the unprecedented volume of studies in the field and the real breakthrough in medical practice made by the discovery and treatment of *** ample discrepancies observed in the different areas do not encourage the development of therapeutic guidelines that could be valid *** these bases,one of the main challenges for the future might be identifying a successful solution to overcome antibiotic *** this context,geography must be considered a relevant matter.

关键词： Helicobacter pylori Antibiotic resistance Geography Therapeutic regimens Therapeutic outcome

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Systematic review: Renin-angiotensin system inhibitors in chemoprevention of hepatocellular carcinoma

引用

World Journal of Gastroenterology 2019年第20期25卷 2524-2538页

作者： Michele Barone maria Teresa Viggiani Giuseppe Losurdo ma.ia.ea.rice principi Alfredo Di Leo Gastroenterology Section Department of Emergency and Organ Transplantation University of Bari Aldo Moro

BACKGROUND Neoangiogenesis is one of the key pathogenetic mechanisms in hepatocellular carcinoma (HCC). Modulation of the renin-angiotensin system (RAS) by angiotensin-converting enzyme inhibitors (ACE-Is) and angiotensin receptor blockers (ARBs) seems to be a possible adjuvant therapy for HCC, due to the antiangiogenic and anti-fibrogenic activity of these drugs. AIM To elucidate the role of ARBs and ACE-Is in HCC. METHODS We performed an electronic search of the literature using the most accessed online databases (PubMed, Cochrane library, Scopus and Web of Science), entering the query terms "angiotensin-converting enzyme inhibitors" OR "ACE inhibitors" OR "ACE-I" AND "hepatocarcinoma*" OR "hepatocellular carcinoma;moreover "angiotensin II type 1 receptor blockers" OR "ARBs" AND "hepatocarcinoma*" OR "hepatocellular carcinoma". Eligibility criteria were:(1) prospective or retrospective clinical studies;(2) epidemiological studies;and (3) experimental studies conducted in vivo or in vitro. Abstracts, conference papers, and reviews were excluded a priori. We limited our literature search to articles published in English, in peer-reviewed *** Thirty-one studies were selected. Three interventional studies showed that ACEIs had a significant protective effect on HCC recurrence only when used in combination with vitamin K or branched chain aminoacids, without a significant increase in overall survival. Of six retrospective observational studies, mainly focused on overall survival, only one demonstrated a prolonged survival in the ACE-Is group, whereas the two that also evaluated tumor recurrence showed conflicting results. All experimental studies displayed beneficial effects of RAS inhibitors on hepatocarcinogenesis. Numerous experimental studies, conducted either on animals and cell cultures, demonstrated the anti-angiogenetic and antifibrotic effect of ACE-Is and ARBs, thanks to the suppression of some cytokines such as vascular endothelial growth factor

关键词： Cirrhosis Renin Angiotensin Survival Cancer prevention Hepatocarcinoma

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optimizing proton pump inhibitors in Helicobacter pylori treatment:Old and new tricks to improve effectiveness

引用

World Journal of Gastroenterology 2019年第34期25卷 5097-5104页

作者： Enzo Ierardi Giuseppe Losurdo Rosa Federica La Fortezza ma.ia.ea.rice principi Michele Barone Alfredo Di Leo Section of Gastroenterology Department of Emergency and Organ Transplantation University of Bari

The survival and replication cycle of Helicobacter pylori(***)is strictly dependant on intragastric pH,since *** enters replicative phase at an almost neutral pH(6-7),while at acid pH(3-6)it turns into its coccoid form,which is resistant to *** these bases,it is crucial to increase intragastric pH by proton pump inhibitors(PPIs)when an antibiotic-based eradicating therapy needs to be ***,several tricks need to be used to optimize eradication rate of different *** administration of the highest dose as possible of PPI,by doubling or increasing the number of pills/day,has shown to be able to improve therapeutic outcome and has often proposed in rescue therapies,even if specific trials have not been performed.A pre-treatment with PPI before starting antibiotics does not seem to be effective,therefore it is ***,the choice of PPI molecule could have a certain weight,since second-generation substances(esomeprazole,rabeprazole)are likely more effective than those of first generation(omeprazole,lansoprazole).A possible explanation is due to their metabolism,which has been proven to be less dependent on cytochrome P450(CYP)2C19 genetic ***,vonoprazan,a competitive inhibitor of H+/K+-ATPase present on luminal membrane of gastric parietal cells has shown the highest efficacy,due to both its highest acid inhibition power and rapid pharmacologic *** current data come only from eastern Asia,therefore its strong power needs to be confirmed outside this geographic area in Western countries as well as related to the local different antibiotic resistance rates.

关键词： Helicobacter pylori Proton pump inhibitors Eradication Cytochrome P450 Optimization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Extra-intestinal manifestations of non-celiac gluten sensitivity: an expanding paradigm

引用

World Journal of Gastroenterology 2018年第14期24卷 1521-1530页

作者： Giuseppe Losurdo ma.ia.ea.rice principi Andrea iannone Annacinzia Amoruso Enzo Ierardi Alfredo Di Leo Michele Barone Section of Gastroenterology Department of Emergency and Organ Transplantation University "Aldo Moro" of Bari

Non celiac gluten sensitivity(NCGS) is a syndrome characterized by a cohort of symptoms related to the ingestion of gluten-containing food in subjects who are not affected by celiac disease(CD) or wheat allergy. The possibility of systemic manifestations in this condition has been suggested by some reports. In most cases they are characterized by vague symptoms such as ‘foggy mind', headache, fatigue, joint and muscle pain, leg or arm numbness even if more specific complaints have been described. NCGS has an immune-related background. Indeed there is a strong evidence that a selective activation of innate immunity may be the trigger for NCGS inflammatory response. The most commonly autoimmune disorders associated to NCGS are Hashimoto thyroiditis, dermatitis herpetiformis, psoriasis and rheumatologic diseases. The predominance of Hashimoto thyroiditis represents an interesting finding, since it has been indirectly confirmed by an Italian study, showing that autoimmune thyroid disease is a risk factor for the evolution towards NCGS in a group of patients with minimal duodenal inflammation. On these bases, an autoimmune stigma in NCGS is strongly supported; it could be a characteristic feature that could help the diagnosis and be simultaneously managed. A possible neurological involvement has been underlined by NCGS association with gluten ataxia, gluten neuropathy and gluten encephalopathy. NCGS patients may show even psychiatric diseases such as depression, anxiety and psychosis. Finally, a link with functional disorders(irritable bowel syndrome and fibromyalgia) is a topic under discussion. In conclusion, the novelty of this matter has generated an expansion of literature data with the unavoidable consequence that some reports are often based on low levels of evidence. Therefore, only studies performed on large samples with the inclusion of control groups will be able to clearly establish whether the large information from the literature regarding extra-intestinal

关键词： Non celiac gluten sensitivity celiac disease gluten gluten ataxia autoimmunity gluten-related disorders thyroiditis extra-intestinal

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Liver fibrosis in primary intestinal lymphangiectasia: An undervalued topic

引用

World Journal of Hepatology 2014年第9期6卷 685-687页

作者： Raffaele Licinio ma.ia.ea.rice principi Enzo Ierardi Alfredo Di Leo Gastroenterology Unit Department of Emergency and Organ TransplantationUniversity of Bari

The relationship between primary intestinal lymphangiectasia(PIL) and liver fibrosis is an emerging topic with many obscure aspects due to the rarity of the disorder.A recent paper reported that a six-month lowfat diet improved liver *** report the case of a 17-year-old girl affected by PIL whose hepatic fibrosis progressively worsened within one year,despite dietetic *** and the previous case report describe extraordinary events,which do not allow clear-cut clinical aspects to be ***,both cases suggest that in patients with PIL,it is necessary to closely monitor liver morphology with in-depth investigations including not only ultrasonography,but also elastography.

关键词： Hepatic transient elastography Liver fibrosis Low-fat diet Primary intestinal lymphangiectasia

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Probiotic monotherapy and Helicobacter pylori eradication: A systematic review with pooled-data analysis

引用

World Journal of Gastroenterology 2018年第1期24卷 139-149页

作者： Giuseppe Losurdo Rossella Cubisino Michele Barone ma.ia.ea.rice principi Gioacchino Leandro Enzo Ierardi Alfredo Di Leo Section of Gastroenterology Department of Emergency and Organ TransplantationUniversity "Aldo Moro"Piazza Giulio Cesare National Institute of Gastroenterology "S De Bellis" Research Hospital

AIM To define probiotic monotherapy effect on Helicobacter pylori(H. pylori) status by performing a systematic *** Methods of analysis and inclusion criteria were based on PRISma recommendations. Relevant publications were identified by searching Pub Med, MEDLINE, Science Direct, and EMBASE. The end-point was to estimate eradication rate and urea breath test delta value before and after probiotic monotherapy across all studies and, overall, with a pooled data analysis. Adverse events of probiotic therapy were evaluated. The data were expressed as proportions/percentages, and 95%CIs were calculated. For continuous variables, we evaluated the weighted mean difference. Odd ratios(ORs) were calculated according to the Peto method for the comparison of eradication rates between probiotics and *** Eleven studies were selected. Probiotics eradicated H. pylori in 50 out of 403 cases. The mean weighted eradication rate was 14%(95%CI: 2%-25%, P =0.02). Lactobacilli eradicated the bacterium in 30 out of 235 patients, with a mean weighted rate of 16%(95%CI: 1%-31%). Saccharomyces boulardii achieved eradication in 6 out of 63 patients, with a pooled eradication rate of 12%(95%CI: 0%-29%). Multistrain combinations were effective in 14 out of 105 patients, with a pooled eradication rate of 14%(95%CI: 0%-43%). In the comparison of probiotics vs placebo, we found an OR of 7.91 in favor of probiotics(95%CI: 2.97-21.05, P ean reduction in delta values higher than placebo(8.61% with a 95%CI: 5.88-11.34, vs 0.19% for placebo, P mal effect on H. pylori clearance, thus suggesting a likely direct role.

关键词： Helicobacter pylori probiotics eradication meta-analysis breath test

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Role of concomitant therapy for Helicobacter pylori eradication: A technical note

引用

World Journal of Gastroenterology 2016年第38期22卷 8638-8640页

作者： Giuseppe Losurdo Floriana Giorgio Andrea iannone ma.ia.ea.rice principi Michele Barone Alfredo Di Leo Enzo Ierardi Section of Gastroenterology Department of Emergency and Organ TransplantationUniversity of Bari

We read with interest the recent meta-analysis by Lin et al who evaluated the effectiveness of concomitant regimen for Helicobacter pylori(H. pylori) in Chinese regions. They found that 7-d concomitant regimen is undoubtedly superior to 7-d triple therapy(91.2% vs 77.9%, P may give satisfactory success rate. Thus, the assessment of an old and outdated treatment versus a more recent and successful one does not seem to bring novel and useful information. Moreover, a 7-d duration has not been ascertained for concomitant regimen, as main guidelines recommend a 10-d schedule for this scheme. Therefore, only studies comparing 10-d concomitant versus 14-d triple seem to be appropriate according to current Guidelines and would clarify which regimen is the most suitable worldwide. Additionally, in this metaanalysis concomitant and sequential therapy showed similar performances, despite it is common opinion that sequential is more prone than concomitant therapy to fail when metronidazole resistance occurs, and China is characterized by high rate of resistance to this antibiotic. None of the included studies evaluated a priori antibiotic resistances, and the lack of this detail hampers the unveiling of this apparent contradiction. In conclusion, the lack of the evaluation of the quality of included trials as well as their high heterogeneity constitute a burdensome limit to draw solid conclusions in this meta-analysis. On the bases of these considerations and the low number of examined trials, we believe that further studies and the knowledge of antibiotic resistances will support with high quality evidence which is the best regimen and its optimal duration.

关键词： Helicobacter pylori Eradication Sequential Concomitant Triple therapy Antibiotic resistances

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ulcerative colitis: From inflammation to cancer. Do estrogen receptors have a role?

引用

World Journal of Gastroenterology 2014年第33期20卷 11496-11504页

作者： ma.ia.ea.rice principi Michele Barone maria Pricci Nicola De Tullio Giuseppe Losurdo Enzo Ierardi Alfredo Di Leo Division of Gastroenterology Department of Emergency and Organ Transplantation University of Bari 70124 Bari Italy Division of Gastroenterology Department of Medical and Surgical Sciences University of Foggia 71100 Foggia Italy

Ulcerative colitis(UC) is a condition at increased risk for colorectal carcinoma(CRC) development. Nowadays, screening and follow-up programs are routinely performed worldwide to promote the early detection of CRCs in subjects with well known risk factors(extent, duration and severity of the disorder). The diffusion of these procedures is presumably the main reason for the marked reduction of cancer incidence and mortality in the course of UC. In addition, chemoprevention has been widely investigated and developed in many medical fields, and aspirin has shown a preventive effect against CRC, while mesalazine has been strongly invoked as a potential chemopreventive agent in UC. However, available studies show some limitations due to the obvious ethical implications of drug withdrawal in UC in order to design a control group. The estrogenreceptors(ER) alpha/beta balance seems to have a relevant influence on colorectal carcinogenesis and ER beta appears to parallel apoptosis, and hence an anticarcinogenic effect. Phytoestrogens are compounds acting as ER beta agonists and have shown a promising chemopreventive effect on sporadic as well as genetically inherited CRC. There is evidence suggesting a role for ERs in UC-related carcinogenesis. In this perspective, since these substances can be considered as dietary supplements and are completely free from side effects, phytoestrogens could be an interesting option for CRC prevention, even when the disease is a consequence of long-term chronic inflammation, as in the course of UC. Further studies of their effects are warranted in both the basic research and clinical fields.

关键词： Ulcerative colitis Epithelial dysplasia Colorectal cancer Estrogen receptors Chemopreven-tion Phytoestrogens Dietary supplementation Inflam-matory bowel disease

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Noninvasive molecular analysis of Helicobacter pylori : Is it time for tailored first-line therapy?

引用

World Journal of Gastroenterology 2017年第14期23卷 2453-2458页

作者： Enzo Ierardi Floriana Giorgio Andrea iannone Giuseppe Losurdo ma.ia.ea.rice principi Michele Barone Antonio Pisani Alfredo Di Leo Gastroenterology Section Department of Emergency and Organ Transplantation University of Bari

The main problem of Helicobacter pylori(H. pylori) infection management is linked to antibiotic resistances. This phenomenon has grown in the last decade, inducing a dramatic decline in conventional regimen effectiveness. The causes of resistance are point mutations in bacterial DNA, which interfere with antibiotic mechanism of action, especially clarithromycin and levofloxacin. Therefore, international guidelines have recently discouraged their use in areas with a relevant resistance percentage, suggesting first-line schedules with expected high eradication rates, i.e., bismuth containing or non-bismuth quadruple therapies. These regimens require the daily assumption of a large number of tablets. Consequently, a complete adherence is expected only in subjects who may be motivated by the presence of major disorders. However, an incomplete adherence to antibiotic therapies may lead to resistance onset, since sub-inhibitory concentrations could stimulate the selection of resistant mutants. Of note, a recent meta-analysis suggests that susceptibility tests may be more useful for the choice of first than second-line or rescue treatment. Additionally, susceptibility guided therapy has been demonstrated to be highly effective and superior to empiric treatments by both meta-analyses and recent clinical studies. Conventional susceptibility test is represented by culture and antibiogram. However, the method is not available everywhere mainly for methodology-related factors and fails to detect hetero-resistances. Polymerase chain reaction(PCR)-based, culture-free techniques on gastric biopsy samples are accurate in finding even minimal traces of genotypic resistant strains and hetero-resistant status by the identification of specific point mutations. The need for an invasive endoscopic procedure has been the most important limit to their spread. A further step has, moreover, been the detection of point mutations in bacterial DNA fecal samples. Few studies on clarithromycin su

关键词： Helicobacter pylori Antibiotic resistance Noninvasive molecular test Tailored therapy Stool

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：