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Automatic Speaker Recognition using Mel-Frequency Cepstral Coefficients Through Machine Learning

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Computers, Materials & Continua 2022年第6期71卷 5511-5521页

作者： u˘gur Ayvaz Hüseyin Gürüler Faheem Khan Naveed Ahmed Taegkeun Whangbo Abdusalomov Akmalbek Bobomirzaevich Department of Computer Engineering Istanbul Technical UniversityIstanbul34485Turkey Department of Information Systems Engineering Mugla Sitki Kocman UniversityMugla48000Turkey Artificial Intelligence Lab Department of Computer EngineeringGachon UniversitySeongnam13557Korea Department of Computer science College of Computing and InformaticsUniversity of SharjahSharjah27272UAE

Automatic speaker recognition(ASR)systems are the field of Human-machine interaction and scientists have been using feature extraction and feature matching methods to analyze and synthesize these *** of the most commonly used methods for feature extraction is Mel Frequency Cepstral Coefficients(MFCCs).Recent researches show that MFCCs are successful in processing the voice signal with high *** represents a sequence of voice signal-specific *** experimental analysis is proposed to distinguish Turkish speakers by extracting the MFCCs from the speech *** the human perception of sound is not linear,after the filterbank step in theMFCC method,we converted the obtained log filterbanks into decibel(dB)features-based spectrograms without applying the Discrete Cosine Transform(DCT).A new dataset was created with converted spectrogram into a 2-D *** learning algorithms were implementedwith a 10-fold cross-validationmethod to detect the *** highest accuracy of 90.2%was achieved using Multi-layer Perceptron(MLP)with tanh activation *** most important output of this study is the inclusion of human voice as a new feature set.

关键词： Automatic speaker recognition human voice recognition spatial pattern recognition MFCCs spectrogram machine learning artificial intelligence

Comparison of a modified Mogen clamp and classic dorsal slit circumcision under local anesthesia:A clinical study

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Current urology 2022年第3期16卷 175-179页

作者： Yavuz Güler Department of urology Private Safa HospitalIstanbul34000Turkey

Background:Currently,although various methods are used,there is no gold standard method for ***,we developed a modified circumcision clamp inspired by the Mogen clamp suitable for circumcisions performed under local anesthesia in our *** evaluate its success and complications,we compared our modified Mogen clamp with a dorsal slit *** and methods:From 2013 to 2017,we retrospectively evaluated 1309 patients who had undergone circumcision;of these,832 used the modified Mogen clamp method(Group 1)and 477 used the dorsal slit method(Group 2).The patients'age,surgery duration,minor hemorrhage(not requiring suture or repeated surgical exploration after circumcision but with buffer or clotting solution used),major hemorrhage(hemorrhage requiring suture or exploration),redundant prepuce skin remnants,revision numbers,and family satisfaction values were evaluated and compared between the 2 ***:Patients were assessed at least 3 times:1 day,1 week,and 1 month after *** mean ages in Groups 1 and 2 were 16.5±22.8 versus 15.5±18.8 months,*** surgical procedure durations were 9.2±1.7 and 15.4±2.5 minutes in Groups 1 and 2,respectively(pund in 164(19.7%)versus 81 patients(17.0%)(p=0.522),including redundant skin in 42(5.4%)versus 15 patients(3.14%)(p=0.105)and major hemorrhage in 20(2.4%)versus 15 patients(3.3%)(p=0.230)in Groups 1 and 2,***:under local anesthesia,the circumcision procedure with the modified Mogen clamp can be performed more rapidly than with the dorsal slit,and the cosmetic results are better as the incision line is more *** postoperative complications were similar,with problems related to redundant skin occurring more frequently with clamp circumcision.

关键词： Circumcision Mogen clamp Dorsal slit

Anterior vitrectomy and partial capsulectomy via anterior approach to treat chronic postoperative endophthalmitis

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International Journal of Ophthalmology(English edition) 2013年第1期6卷 103-105页

作者： Mete Güler Turgut Yìlmaz Department of Ophthalmology School of Medicine Adiyaman University Department of Ophthalmology School of MedicineInnü University

AIM:To describe the results of vitrectomy and partial capsulectomy via anterior approach surgical technique in treatment of chronic postoperative endophthalmitis (CPE). METHODS:Clinical records of 9 patients treated for CPE between 2006 and 2010 were reviewed retrospectively. All of these patients were treated with vitrectomy and partial capsulectomy via anterior approach. RESuLTS:Six of 9 patients were male. The average patients’ age was (60 ±8.1) years. The average period between cataract extraction and onset of signs and symptoms was (3.6±1.3) weeks. The average presenting visual acuity was 0.3 ±0.1 and the average final post operative visual acuity was 0.7±0.2. The mean follow-up period was (28.1±8.9) weeks. In all patients, the inflammation subsided after surgery. · CONCLuSION:Our results suggest that anterior vitrectomy and partial capsulectomy via anterior approach may be considered as potentially useful and relatively less invasive technique to treat CPE.

关键词： chronic postoperative endophthalmitis anterior vitrectomy partial capsulectomy

Increased syndecan-1 and glypican-3 predict poor perinatal outcome and treatment resistance in intrahepatic cholestasis

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Hepatobiliary & Pancreatic Diseases International 2020年第3期19卷 271-276页

作者： Basak Gümüs Güler Sibel Ozler Department of Health sciences Istinye UniversityIstanbul 34010Turkey Department of Perinatology Selcuk University Faculty of MedicineKonya 42130Turkey

Background:Intrahepatic cholestasis of pregnancy(ICP)increases the risk of adverse pregnancy *** study aimed to explore the association between serum syndecan-1 and glypican-3 levels and the adverse perinatal outcome as well as the responses to the treatment of ursodeoxycholic acid(uDCA).Methods:This prospective,case control study included 88 pregnant women(44 women with ICP and 44 healthy controls).The primary end points were the perinatal outcome and the response to uDCA therapy.A logistic regression model was used to identify the independent risk factors of adverse pregnancy outcomes and reduced response to uDCA ***:Women with ICP had significantly higher serum syndecan-1(1.27±0.36 ng/m L vs.0.98±0.50 ng/m L;P=0.003),glypican-3(1.78±0.13 ng/m L vs.1.69±0.16 ng/m L;P=0.004),AST(128.59±1.44 vs.13.29±1.32 u/L;Pu/L;Putcome was related to increased glypican-3(OR=4.275,95%CI:2.726–5.635;P=0.039),and PBA(OR=3.026,95%CI:1.069–13.569;P=0.037).Increases of syndecan-1(OR=7.464,95%CI:2.130–26.153,P=0.017)and glypican-3(OR=6.194,95%CI:2.951–13.002;P=0.025)were the risk factors of decreased response to uDCA ***:Syndecan-1 and glypican-3 might be powerful determinants in predicting adverse perinatal outcome in patients with ICP,and they can be used to predict the response to the uDCA treatment.

关键词： Intrahepatic cholestasis of pregnancy Syndecan-1 Glypican-3 Adverse perinatal outcome Response to uDCA

Esophageal inserted subclavian catheter:a rare complication

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World Journal of Emergency Medicine 2024年第3期15卷 243-245页

作者： DilberÜçöz Kocaşaban SertaçGüler Emergency Medicine Clinic Health Sciences University Ankara Training and Research HospitalAnkara 06930Turkey

Central venous catheterization(CVC) is an invasive procedure for administering fluids,nutrients,and drugs;monitoring central venous pressure;performing pulmonary artery catheterization;and placing transvenous pacemakers in intensive care units and all specialties,from anesthesia to emergency medicine,for the treatment of trauma and hemodynamically unstable pediatric and adult patients.[1,2]Complications have been observed in more than 15% of patients who underwent ***,infectious,and thrombotic complications have been reported in 5%–19%,5%–26%,and 2%–26% of patients,respectively.[3] Malposition,on the other hand,is common in subclavian catheter insertion and is usually associated with an initially misplaced guidewire.[4]

关键词： unstable insertion initially

A conserved arbuscular mycorrhizal fungal core-species community colonizes potato roots in the Andes

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Fungal Diversity 2016年第2期77卷 317-333页

作者： Carolina Senés-Guerrero a.thur schüßler Department of Biology GeneticsLudwig-Maximilians UniversityGrosshaderner Str.482152 PlaneggMartinsriedGermany

Plant-symbiotic arbuscular mycorrhizal fungi(AMF)are of high global ecological and economic importance,but describing environmental communities of AMF at the species level remains a challenge,despite the need to understand AMF-plant preferences and to apply AMF in sustainable ***,the potato-associated AMF species community composition was assessed for three Andean countries along an altitudinal gradient and at different plant stages,by using 454 GS-FLX+sequencing of a 760 bp LSu rRNA gene PCR *** methods were compared:defining OTus based on a simple sequence similarity threshold,or affiliating reference sequences to species based on a high throughput phylogenetic annotation approach using an evolutionary placement algorithm(EPA).The EPA-based approach was not only more precise,but also fundamental to robustly unveil the AMF species community *** principal advantage of this approach was also demonstrated by using artificially constructed datasets based on validated public database *** affiliation of sequence reads to species using phylogenetic annotation revealed a surprisingly conserved AMF core-species community structure in Andean potatoes,regardless of different plant stages and environmental *** total,41 species were detected and in some cases more than 25 species were found colonizing an individual root *** species were identified as dominant colonizers,co-occurring with Cetraspora nodosa and certain Claroideoglomus and Rhizophagus species in most potato root samples.

关键词： 454 pyrosequencing Andean ecosystems Arbuscular mycorrhizal fungi species communities DNA based species identification Evolutionary placement algorithm Solanum tuberosum(potato)

Linearized model for optimization of coupled electricity and natural gas systems

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Journal of Modern Power Systems and Clean Energy 2017年第3期5卷 364-374页

作者： Mathias SIRVENT Nikolaos KANELAKIS Bjorn GEIßler Pandelis BISKAS Discrete Optimization Friedrich-Alexander-Universitat Erlangen-Nurnberg(FAU)Cauerstr.1191058 ErlangenGermany school of Electrical and Computer Engineering Aristotle University of Thessaloniki54124 ThessalonikiGreece

In this paper,a combined optimization of a coupled electricity and gas system is *** the electricity network a unit commitment problem with optimization of energy and reserves under a power pool,considering all system operational and unit technical constraints is *** gas network subproblem is a medium-scale mixed-integer nonconvex and nonlinear programming *** coupling constraints between the two networks are nonlinear as *** resulting mixed-integer nonlinear program is linearized with the extended incremental method and an outer approximation *** resulting model is evaluated using the Greek power and gas system comprising fourteen gas-fired units under four different approximation accuracy *** results indicate the efficiency of the proposed mixed-integer linear program model and the interplay between computational requirements and accuracy.

关键词： Electricity system Natural gas system Mixed-integer(non)linear programming Extended incremental method Outer approximation

大型X射线光学仪器:单层镜和多层镜的制造与表征(英文)

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光学精密工程 2007年第12期15卷 1869-1877页

作者： Michael Strmer Dietrich Huβler Wolfgang Jger Rüdiger Bormann Institute of Materials Research GKSS-Research Centre Geesthacht GmbHMax-Planck-Strasse 121502 GeesthachtGermany Microanalysis of Materials Faculty of EngineeringUniversity KielKaiserstrasse 224143 KielGermany

150 ～500 mm长度的各种X射线光学元件可用于光束导引,光束调整,以及单色化。本文介绍了两种不同的大型X射线反射镜。第一种为单层反射镜,这种反射镜以2°掠入射角在软X射线区(50 ～200 eV)起全反射镜作用,可用于自由电子激光器,如德国... 详细信息

150 ～500 mm长度的各种X射线光学元件可用于光束导引,光束调整,以及单色化。本文介绍了两种不同的大型X射线反射镜。第一种为单层反射镜,这种反射镜以2°掠入射角在软X射线区(50 ～200 eV)起全反射镜作用,可用于自由电子激光器,如德国汉堡的FLASH。第二种是多层镜,由于它的布喇格反射特性,适于作为反射镜以0 .4 ～1°的入射角用于硬X射线区(20 ～50 keV) ,如层析光束线的同步辐射存储环中。两种反射镜都用最新物理汽相淀积法制备,并用磁控溅射来实现X射线光学应用所需要的优良光学品质。这一淀积工艺使不同批次的镀膜稳定性良好,有利于实际反射镜在优质衬底上的最后淀积。单层镜和多层镜在它们的相关能量范围内都有很高的反射率,表面粗糙度也很低,且在整个光学波长区这些特性表现均匀。文中所叙相关研究都是借助X射线反射计量(XRR)法,透射电子显微镜(TEM)、光学轮廓仪(OP) ,以及原子力显微镜(AFM)完成的。

关键词： X射线光学多层膜反射镜全反射镜 X射线反射测量磁控溅射同步辐射自由电子激光器

When horsetails became giants

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Chinese science Bulletin 2012年第18期57卷 2285-2288页

作者： FENG Zhuo ZIEROLD Thofid ROβler Ronny Museum fur Naturkunde ChemnitzMoritzstraβe 2009111Germany Yunnan Key Laboratory for Palaeobiology Yunnan UniversityKunming 650091China

Horsetails arose in the Late Devonian,evolved a greater diversity and forming fast growing bamboo-like thickets in the Carboniferous lowland swamp forest ***,the diversity of this group drastically declined during the Permian while the climate became more dynamic and *** only a single surviving genus exists,the herbaceous *** we report an exceptional large horsetail tree from the Early Permian Petrified Forest of *** fossil horsetail tree is assigned to Arthropitys bistriata (Cotta) *** is 15 m high and over 25 cm in diameter,with thick wood and at least 3 orders of woody branching system formed a big canopy,and is morphologically very comparable with the living woody higher *** suggests that the plasticity mechanism of Permian calamitaleans enabled novel growth strategies when they competed with the rising gymnosperms during the environmental changes.

关键词：木贼森林生态系统巨人早二叠世分支系统植物形态裸子植物环境变化