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Performance of Text-Independent Automatic Speaker Recognition on a Multicore System

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Tsinghua Science and Technology 2024年第2期29卷 447-456页

作者： Rand Kouatly Talha ali Khan Faculty of Tech and Software Engineering University of Europe for Applied SciencesPotsdam 14469Germany

This paper studies a high-speed text-independent Automatic Speaker Recognition(ASR)algorithm based on a multicore system's Gaussian Mixture Model(GMM).The high speech is achieved using parallel implementation of the feature's extraction and aggregation methods during training and testing *** memory parallel programming techniques using both OpenMP and PThreads libraries are developed to accelerate the code and improve the performance of the ASR *** experimental results show speed-up improvements of around 3.2 on a personal laptop with Intel i5-6300HQ(2.3 GHz,four cores without hyper-threading,and 8 GB of RAM).In addition,a remarkable 100%speaker recognition accuracy is achieved.

关键词： Automatic Speaker Recognition(ASR) Gaussian Mixture Model(GMM) shared memory parallel programming PThreads OpenMP

CFD simulation and optimization of an industrial cement gas-solid air classifier

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Particuology 2024年第6期89卷 172-184页

作者： Mohamadreza Esmaeilpour ali Mohebbi Vahab Ghalandari Department of Chemical Engineering Faculty of EngineeringShahid Bahonar University of KermanKermanIran Kerman Momtazan Cement Company KermanIran

An air classifier is one of the main and effective devices in cement *** this study,a three-dimensional,steady and two-phase(solid-gas)computational fluid dynamics(CFD)simulation was performed to optimize the performance of this device in the Kerman Momtazan cement plant,*** the validation of CFD results,the air flow field and air path lines between fixed blades were checked carefully and the non-uniformity in velocity distribution and the formation of vortex flows between the blades close to particle inlets were *** study tried to improve the device efficiency by changing the method of entering particles into the device,resulting in a reduction in air classifier electrical energy consumption(from 41 to 35(kW h)/t)and an increase in production rate(from 203 to 214 t/h).Additionally,the study investigated the effects of other modifiable operating conditions like rotary cage rotation speed,pressure difference,and inlet air temperature on the particle size distribution and classifier *** results showed that increasing the cage rotation speed decreased the product rate and the product particles mean diameter while increasing pressure difference or increasing temperature increased the product rate and the product particles mean *** was concluded that these modifiable operating conditions can significantly affect the performance of the air classifier in the cement industry.

关键词： Cement air classifier Computational fluid dynamics Gas-solid two-phase flow Optimization Eulerian-Lagrangian method Efficiency

Sustainable pathways to ammonia: a comprehensive review of green production approaches

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CLEAN ENERGY 2024年第2期8卷 60-72页

作者： Ahmed, Hafiz Sharjeel Yahya, Zaid Khan, Waqar ali Faraz, ali Univ Engn & Technol UET Lahore Pakistan NFC Inst Engn & Fertilizer Res Chem Engn Dept Faislabad Pakistan Univ Punjab Chem Engn Dept Lahore Pakistan

Ammonia production is vital in global industries but faces increasing environmental concerns, necessitating a shift towards sustainable methods. This review comprehensively explores diverse hydrogen production approaches and their potential impact on sustainable ammonia synthesis. The primary focus is investigating hydrogen production methods that enhance both efficiency and sustainability in ammonia synthesis, which is crucial for reducing its environmental footprint. Furthermore, the review highlights the pivotal role of catalysts in improving Faradaic efficiency in ammonia synthesis, emphasizing their significance in overall process efficiency. The study identifies innovative technologies that have the potential to revolutionize ammonia production while aligning with global sustainability goals. Through a thorough examination of hydrogen production methods and catalytic advances, this review provides valuable insight into greener and more efficient ammonia production practices. In conclusion, it emphasizes the importance of exploring hydrogen production methods and leveraging catalysts to improve ammonia production sustainability and efficiency. It addresses a critical research gap and paves the way for an environmentally responsible and globally aligned ammonia production industry. Hydrogen production methods that enhance both efficiency and sustainability in ammonia synthesis are reviewed, highlighting the pivotal role of catalysts in improving Faradaic efficiency in ammonia synthesis. It addresses a critical research gap and paves the way for an environmentally responsible and globally aligned ammonia production industry. Graphical Abstract

关键词： ammonia production green alternatives sustainability catalyst ELECTROCATALYTIC N-2 REDUCTION ELECTROCHEMICAL SYNTHESIS NITROGEN ELECTROSYNTHESIS CATALYSTS CARRIER WATER

Benchmarking YOLOv5 models for improved human detection in search and rescue missions

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Journal of Electronic Science and Technology 2024年第1期22卷 70-80页

作者： Namat Bachir Qurban ali Memon Electrical Engineering Department College of EngineeringUnited Arab Emirates UniversityAl Ain15551United Arab Emirates

Drone or unmanned aerial vehicle(UAV)technology has undergone significant *** technology allows UAV to carry out a wide range of tasks with an increasing level of sophistication,since drones can cover a large area with ***,the increasing number of computer vision applications utilizing deep learning provides a unique insight into such *** primary target in UAV-based detection applications is humans,yet aerial recordings are not included in the massive datasets used to train object detectors,which makes it necessary to gather the model data from such *** only look once(YOLO)version 4,RetinaNet,faster region-based convolutional neural network(R-CNN),and cascade R-CNN are several well-known detectors that have been studied in the past using a variety of datasets to replicate rescue ***,we used the search and rescue(SAR)dataset to train the you only look once version 5(YOLOv5)algorithm to validate its speed,accuracy,and low false detection *** comparison to YOLOv4 and R-CNN,the highest mean average accuracy of 96.9%is obtained by *** comparison,experimental findings utilizing the SAR and the human rescue imaging database on land(HERIDAL)datasets are *** results show that the YOLOv5-based approach is the most successful human detection model for SAR missions.

关键词： Unmanned aerial vehicle(UAV) Search and rescue(SAR) You look only once(YOLO)model You only look once version 5 (YOLOv5)

Effect of Rosmarinus officinalis and Origanum majorana extracts on stability of sunflower oil during storage and repeated heating

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Oil Crop Science 2024年第1期9卷 29-37页

作者： ali Sahunie Department of Analytical and Food Chemistry Tishreen UniversityLattakiaSyria

Both rosemary(Rosmarinus officinalis)and marjoram(Origanum majorana)are abundant in phenolic compounds,exhibiting exceptional antioxidant *** study aims to assess the impact of rosemary and marjoram extracts on the stability of sunflower oil during storage and repeated *** oil supplemented with herbal extracts or butylated hydroxytoluene(BHA)at a concentration of 200 ppm was stored for six months under light and dark conditions at room *** value(PV),p-anisidine value(An-V),and total oxidation(TOTOX)value were measured to monitor lipid oxidation progression.A significant difference(P<0.05)was observed between light and dark storage for all studied samples regarding oxidation *** ethanolic extract of rosemary exhibited higher antioxidant activity compared to BHA and other ***,sunflower oil supplemented with the ethanolic extract of rosemary underwent weekly treatment at 100℃for 30 min over four consecutive *** all oxidation indicators increased during repeated heating,the addition of rosemary and marjoram extracts as well as BHA significantly reduced these *** findings demonstrate that both rosemary extracts and marjoram extracts can serve as natural antioxidants in edible oils.

关键词： Phenolic compounds BHA Marjoram extract Rosemary extract Sunflower oil

Exploring Nutritional Compositions,Volatile Compounds,Health Benefits,Emerging Processing Technologies,and Potential Food Products of Glutinous Rice:A Review

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Rice science 2024年第3期31卷 251-268页

作者： Maimunah Mohd ali Norhashila HASHIM Department of Food Sciences Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaBangi 43600SelangorMalaysia Department of Biological and Agricultural Engineering Faculty of EngineeringUniversiti Putra MalaysiaSerdang 43400SelangorMalaysia SMART Farming Technology Research Centre Faculty of EngineeringUniversiti Putra MalaysiaUPM Serdang 43400SelangorMalaysia Innovation Center for Confectionary Technology(MANIS) Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaUKM Bangi 43600Selangor Darul EhsanMalaysia

Glutinous rice(Oryza sativa ***)stands out as one of the most popular rice varieties globally,amidst thousands of rice *** increasing popularity is attributed to its rich nutritional compositions and health *** review aims to summarize the nutritional compositions,volatile compounds,and health benefits of glutinous ***,in-depth studies are necessary to explore the utilization of glutinous rice in enhancing processing technologies and developing new food *** rice has been shown to possess numerous health benefits,including antioxidant activity,bioactive compounds,anti-cancer properties,anti-inflammatory effects,anti-diabetic potential,and cholesterol-lowering *** its nutritional compositions,the major volatile compounds identified in glutinous rice could serve as a functional food for human *** processing technologies related to glutinous rice are elaborated to improve the latest developments for incorporating them into various food products.

关键词： glutinous rice health benefit volatile compound nutritional composition processing technology

Challenges and opportunities in the production of magnesium parts by directed energy deposition processes

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Journal of Magnesium and Alloys 2024年第5期12卷 1663-1686页

作者： Gürel Cam ali Günen Iskenderun Technical University Faculty of Engineering and Natural SciencesDepartment of Mechanical Engineering31200 Iskenderun-HatayTurkey Iskenderun Technical University Faculty of Engineering and Natural SciencesDepartment of Metallurgy and Materials Engineering31200 Iskenderun-HatayTurkey

Mg-alloys have gained considerable attention in recent years for their outstanding properties such as lightweight,high specific strength,and corrosion resistance,making them attractive for applications in medical,aerospace,automotive,and other transport ***,their widespread application is hindered by their low formability at room temperature due to limited slip *** Mg-alloys have low mechanical properties due to the presence of casting defects such as porosity and anisotropy in addition to the high *** casting methods benefit from established process optimization techniques for these problems,additive manufacturing methods are increasingly replacing casting methods in Mg alloys as they provide more precise control over the microstructure and allow specific grain orientations,potentially enabling easier optimization of anisotropy properties in certain *** metal additive manufacturing(MAM)technology also results in some manufacturing defects such as inhomogeneous microstructural evolution and porosity and additively manufactured Mg alloy parts exhibit lower properties than the wrought parts,they in general exhibit superior properties than the cast ***,MAM is a promising technique to produce Mg alloy *** energy deposition processes,particularly wire arc directed energy deposition(WA-DED),have emerged as an advantageous additive manufacturing(AM)technique for metallic materials including magnesium alloys,offering advantages such as high deposition rates,improved material efficiency,and reduced production costs compared to subtractive ***,the inherent challenges associated with magnesium,such as its high reactivity and susceptibility to oxidation,pose unique hurdles in the application of this *** review paper delves into the progress made in the application of DED technology to Mg-alloys,its challenges,and ***,the predominant imperfections,notably inhomo

关键词： Additive manufacturing DED processes Arc-DED Wire arc additive manufacturing(WAAM) 3-D printing High deposition rate

起始联合降脂策略对心内科门诊“极高危ASCVD”患者疗效及安全性观察——真实世界的前瞻性队列研究

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中国临床药理学与治疗学 2024年第8期29卷 907-916页

作者：赵震宇李媛郭宇轩毛萧萧 MD Sayed ali sheikh 夏珂中南大学湘雅医院临床药理研究所中南大学湘雅医院心血管内科湖南长沙410008 Internal Medicine Department CardiologyCollege of MedicineJouf UniversitySakaka 72388Saudi Arabia

目的:在真实世界的前瞻性队列研究中观察心内科门诊“极高危ASCVD”患者在治疗起始阶段采用联合降脂策略的疗效与安全性。方法:连续入组2021年1月至6月在湘雅医院心内科高脂血症专病门诊就诊的“极高危ASCVD”患者,根据其实际降脂策略... 详细信息

目的:在真实世界的前瞻性队列研究中观察心内科门诊“极高危ASCVD”患者在治疗起始阶段采用联合降脂策略的疗效与安全性。方法:连续入组2021年1月至6月在湘雅医院心内科高脂血症专病门诊就诊的“极高危ASCVD”患者,根据其实际降脂策略分为三组:阿托伐他汀单药组;阿托伐他汀联合依折麦布组;阿托伐他汀联合依洛尤单抗组。主要观察终点为治疗一个月后低密度脂蛋白胆固醇(LDL-C)、脂蛋白a[Lp(a)]、非-HDL-C变化,次要终点为总胆固醇(TC)、甘油三酯(TG)、LDL-C、超敏C反应蛋白(hs-CRP)变化及安全性指标。结果:无论哪种联合方式,在“极高危ASCVD”患者降脂起始阶段联合降脂治疗的疗效均显著优于阿托伐他汀单药组:LDL-C、Log[Lp(a)]、非-HDL-C、TC的降幅更大,差异均有统计学意义(均P0.05)。以“LDL-C<1.4 mmol/L或<1.8 mmol/L”作为降脂达标的标准时,两组联合降脂治疗的LDL-C达标率均高于阿托伐他汀单药组,差异均有统计学意义(均P<0.05);阿托伐他汀联合依洛尤单抗组的LDL-C达标率高于阿托伐他汀联合依折麦布组,差异均有统计学意义(均P<0.05)。单独或联合“LDL下降超过50%”的降幅为达标标准,三组均无人能达标。治疗后三组间的肝脏转氨酶水平变化差异均无统计学意义(均P<0.05);三组间心肌酶同工酶(CK-MB)均下降,但差异无统计学意义(P<0.05)。与阿托伐他汀单药组相比,两联合降脂组治疗组的血糖均下降,差异具有统计学意义(P<0.05);阿托伐他汀联合依折麦布组的血糖比阿托伐他汀联合依洛尤单抗组的降幅更大,差异有统计学意义(P<0.05)。结论:起始联合降脂治疗1个月对心内科门诊“极高危ASCVD”患者的降脂效果及LDL-C的达标率优于阿托伐他汀单药组。以LDL-C<1.4 mmol/L或<1.8 mmol/L为降脂达标目标时,阿托伐他汀联合依洛尤单抗组治疗1个月后LDL-C达标率高于联合依折麦布组;以“LDL下降超过50%”的降幅作为降脂达标标准时,1个月内很难达标。门诊“极高危ASCVD”患者采用起始联合的降脂治疗1个月无不良反应。起始联合降脂策略可用于心内科门诊“极高危ASCVD”患者中LDL-C数值需早期达标的人群,阿托伐他汀联合依洛尤单抗可用于需在1个月内LDL-C<1.4 mmol/L或<1.8 mmol/L的人群。

关键词：起始联合降脂极高危ASCVD 真实世界前瞻性队列研究早期达标

Thermal analysis of the Rindler-Schwarzschild black hole via corrected entropy

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Communications in Theoretical Physics 2024年第9期76卷 95-106页

作者： Allah Ditta Xia Tiecheng Riasat ali aliÖvgün Department of Mathematics Shanghai University and Newtouch Center for Mathematics of Shanghai UniversityShanghai200444China Physics Department Eastern Mediterranean UniversityFamagusta99628 North Cyprus via Mersin 10Turkiye

In this study,we investigate the thermodynamic characteristics of the Rindler–Schwarzschild black hole *** analysis encompasses the examination of energy emission,Gibbs free energy,and thermal *** calculate various quantities such as the Hawking temperature,geometric mass,and heat capacity to assess the local and global thermodynamic *** temperature of the black hole is determined using the first law of thermodynamics,while the energy emission rate is evaluated as *** computing the Gibbs free energy,we explore the phase transition behavior exhibited by Rindler–Schwarzschild black hole,specifically examining the swallowing ***,we derive the corrected entropy to investigate the influence of thermal fluctuations on small and large black ***,we compare the impact of correction terms on the thermodynamic system by comparing the results obtained for large black holes and small black holes.

关键词： black holes thermodynamics thermal fluctuations heat capacity Gibbs free energy energy emission Rindler–Schwarzschild black hole