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Sliding mode control of three-phase AC/DC converters using exponential rate reaching law

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Journal of Systems Engineering and Electronics 2022年第1期33卷 210-221页

作者： JEERANANTASIN narin NUNGAM Suksun Department of Electrical and Computer Engineering Faculty of EngineeringKing Mongkut’s University of Technology North BangkokBangkok 10800Thailand

Sliding mode control(SMC) becomes a common tool in designing robust nonlinear control systems, due to its inherent characteristics such as insensitivity to system uncertainties and fast dynamic *** modes are involved in the SMC operation, namely reaching mode and sliding *** the reaching mode, the system state is forced to reach the sliding surface in a finite *** major drawback of the SMC approach is the occurrence of chattering in the sliding mode, which is undesirable in most ***, the trade-off between chattering reduction and fast reaching time must be considered in the conventional SMC *** paper proposes SMC design with a novel reaching law called the exponential rate reaching law(ERRL) to reduce chattering, and the control structure of the converter is designed based on the multiinput SMC that is applied to a three-phase AC/DC power *** simulation and experimental results show the effectiveness of the proposed technique.

关键词： exponential rate reaching law(ERRL) multi-input sliding mode control(SMC) chattering reduction three-phase AC-to-DC converter

A novel mutation in COL1A2 leads to osteogenesis imperfecta/Ehlers-Danlos overlap syndrome with brachydactyly

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Genes & Diseases 2019年第2期6卷 138-146页

作者： Thunyaporn Budsamongkol narin Intarak Thanakorn Theerapanon Somchai Yodsanga Thantrira Porntaveetus Vorasuk Shotelersuk Geriatric Dentistry and Special Patients Care International Program Faculty of DentistryChulalongkorn UniversityBangkok10330Thailand Genomics and Precision Dentistry Research Unit Department of PhysiologyFaculty of DentistryChulalongkorn UniversityBangkok10330Thailand Center of Excellence for Regenerative Dentistry Faculty of DentistryChulalongkorn UniversityBangkok10330Thailand Biomaterial Testing Center Faculty of DentistryChulalongkorn UniversityBangkok10330Thailand Center of Excellence for Medical Genomics Department of PediatricsFaculty of MedicineChulalongkorn UniversityBangkok10330Thailand Excellence Center for Medical Genetics King Chulalongkorn Memorial HospitalThe Thai Red Cross SocietyBangkok10330Thailand

Osteogenesis imperfecta(OI)is mainly characterized by bone fragility and Ehlers-Danlos syndrome(EDS)by connective tissue *** in COL1A1 or COL1A2 can lead to both ***/EDS overlap syndrome is mostly caused by helical mutations near the amino-proteinase cleavage site of type Ⅰ *** this study,we identified a Thai patient having OI type Ⅲ,EDS,brachydactyly,and dentinogenesis *** dentition showed delayed eruption,early exfoliation,and severe *** the first time,ultrastructural analysis of the tooth affected with OI/EDS showed that the tooth had enamel inversion,bonelike dentin,loss of dentinal tubules,and reduction in hardness and elasticity,suggesting severe developmental *** severe dental defects have never been reported in OI or *** sequencing identified a novel de novo heterozygous glycine substitution,c.3296G>A,***1099Glu,in exon 49 of *** patients with mutations in the exon 49 of COL1A2 were previously reported to have OI with brachydactyly and intracranial ***,two of these three patients did not show hyperextensible joints and hypermobile skin,while our patient at the age of 5 years had not developed intracranial ***,we demonstrate that the novel glycine substitution in the carboxyl region of alpha2(Ⅰ)collagen triple helix leads to OI/EDS with brachydactyly and severe tooth defects,expanding the genotypic and phenotypic spectra of OI/EDS overlap syndrome.

关键词： Bone-like dentin Collagen defect Dentinogenesis imperfecta Joint laxity Skeletal fragility Skin hypermobility

Heat Transfer Behavior in a Square Duct with Tandem Wire Coil Element Insert

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Chinese Journal of Chemical Engineering 2012年第5期20卷 863-869页

作者： Smith Eiamsa-ard narin Koolnapadol Pongjet Promvonge Department of Mechanical Engineering Faculty of Engineering Mahanakorn University of Technology Department of Mechanical Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang

Effects of insertion of tandem wire coil elements used as turbulator on heat transfer and turbulent flow friction characteristics in a uniform heat-flux square duct are experimentally investigated in this work. The experiment is conducted for turbulent flow with the Reynolds number from 4000 to 25000. The wire coil element is inserted into the duct with a view to generating a swirl flow that assists to wash up the flow trapped in the duct corners and then increase the heat transfer rate of the test duct. Apart from the full-length coil, 1D and 2D length coil elements placed in tandem inside the duct with various free-space lengths are introduced to reduce the friction loss. The results obtained from these wire coil element inserts are also compared with those from the smooth duct. The experimental results reveal that the use of wire coil inserts for the full-length coil, 1D and 2D coil elements with a short free-space length leads to a considerable increase in heat transfer and friction loss over the smooth duct with no insert. The full-length wire coil provides higher heat transfer and friction factor than the tandem wire coil elements under the same operating conditions. Also, performance evaluation criteria to assess the real benefits in using the wire coil insert into the square duct are determined.

关键词： heat transfer wire coil insert square duct turbulator

Development and assessment of tyrosinase inhibitory activity of liposomes of Asparagus racemosus extracts

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Asian Journal of Pharmaceutical Sciences 2013年第2期8卷 134-142页

作者： narin Therdphapiyanak Montree Jaturanpinyo Neti Waranuch Lalana Kongkaneramit Narong Sarisuta Faculty of Pharmacy Mahidol UniversityBangkokThailand Faculty of Pharmaceutical Sciences Naresuan UniversityPhitsanulokThailand Faculty of Pharmacy Srinakharinwirot UniversityNakhonnayokThailand

The purpose of this study was to develop liposomal formulations of Asparagus racemosus root extract(AR1-6)as well as evaluate the physicochemical properties and in vitro tyrosinase inhibitory *** composed of AR1-6 to lipid weight ratio of 1:10 and lecithin(LEC)or Phospholipon90G(PC90G)as structural phospholipid at 7:3 molar ratio to CHOL were prepared by various methods,***-film(CF),reverse-phase evaporation(REV),polyol dilution(PD),and freeze-drying of monophase solution(MFD)*** results revealed that vesicles prepared by CF and MFD were multilamellar whereas those prepared by REV and PD were oligolamellar in nature with particle sizes ranging from 0.26 to 13.83 *** zeta potentials were in the range of1.5 to39.3 ***1-6 liposomes with LEC possessed significantly higher entrapment than those with *** highest entrapment efficiency and in vitro tyrosinase inhibitory activity of 69.08%and 25%,respectively,were obtained from liposomes having LEC and prepared by PD *** tyrosinase inhibitory activity were in the rank order of LEC>PC90G,and PD>CF>REV>*** could be concluded that the mechanism of vesicle forming in each method of preparation was the key factor influencing physicochemical properties,particularly vesicle type,size,surface charge,and entrapment,which were well correlated with the biological activity.

关键词： Asparagus racemosus Liposomes Lipid composition Method of preparation Tyrosinase inhibitory activity

去增长与社会主义:关于若干重大议题的注解与探讨

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鄱阳湖学刊 2024年第3期 12-21,155页

作者：南伊·什卡拉厄兹古尔·纳林李帅(译) 李震邦(译) 纽约大学土耳其奥尔杜大学云南大学马克思主义学院云南昆明650500

面对当今全球能源枯竭、资源分配不均以及自身理论短板的情况,“去增长”理论作为当代资本主义批判的重要范式,逐渐产生了与社会主义的趋同。文章分析了二者之间的内在张力,基于去增长理论无法与资本主义彻底决裂的软弱性以及社会主义... 详细信息

面对当今全球能源枯竭、资源分配不均以及自身理论短板的情况,“去增长”理论作为当代资本主义批判的重要范式,逐渐产生了与社会主义的趋同。文章分析了二者之间的内在张力,基于去增长理论无法与资本主义彻底决裂的软弱性以及社会主义计划经济的经验教训,考察了去增长与社会主义相结合的可能性。在超越简单二分法的基础之上,文章探讨了市场与计划相结合、自律与他律相统一、民主与集中相协调的科学性与可操作性,提出了本地化、自治、协商三条理论进路,以克服既有理论与实践的片面性。文章最后强调了实践运动的第一性,无论是去增长还是社会主义理论,都应当以现实运动为前提,在资本主义现实批判中相互借鉴、共同发展,增进人类福祉。

关键词：去增长社会主义计划生产自治生态边界

金融科技对商业银行盈利能力的分析影响 ——来自新加坡商业银行的经验证据

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金融科技对商业银行盈利能力的分析影响 ——来自新加坡商业银行...

作者： narin Pankrajab 上海财经大学

学位级别：硕士

在数字化时代金融科技初创企业公司对全世界金融市场有巨大影响。上面的研究显示因数字平台让人们更容易接触金融与服务的体系,使传统银行以及其企业的发展速度受到特大影响。此次研究目的为调查在对商业银行利润造成影响的金融科技公... 详细信息

在数字化时代金融科技初创企业公司对全世界金融市场有巨大影响。上面的研究显示因数字平台让人们更容易接触金融与服务的体系,使传统银行以及其企业的发展速度受到特大影响。此次研究目的为调查在对商业银行利润造成影响的金融科技公司投资结果,同时观察银行的财务比率与其盈利能力的之间关系。此研究举两个模:1.银行的盈利能力的模型2.金融科技初创企业公司的集资模型。至于金融科技初创企业的投资形式可分为,收购兼并形式(M&A),私人产权形式(PE),创业基金投资者形式(VC)并对新加坡3家商业银行的财务因素进行研究。根据2014年至2021年的每个季度数据显示通过one-step system GMM进行分析发现经济衰退的现象。研究发现在金融科技公司投资对传统银行的盈利能力造成负面影响。有些财务比率也对其盈利能力造成影响,如:成本收入比率,贷款损失备用以及有效税率。额外的系统鲁棒性测试:可变性影响,季度效应,Covid-19影响以及投资条款内容与本次研究结果符合的条。在上述基础上来讲,商业银行应多重视金融科技初创企业。而且相关的监管机构为了开发更稳定的系统可应用本篇研究。

关键词：银行盈利能力金融科技投资 System GMM 新加坡

Effect of sodium tungstate on visual evoked potentials in diabetic rats

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International Journal of Ophthalmology(English edition) 2016年第5期9卷 677-681页

作者： Mehmet Bulut Bariszgür Dnmez Nihai ztürk Gksum Basaranlar Ceren Kencebay Manas narin Derin Semir zdemir Department of Ophthalmology Antalya Education and Research Hospital Department of Nutrition and Dietetics School of HealthAkdeniz University Department of Biophysics Faculty of MedicineAkdeniz University

AIM： To evaluate the effect of sodium tungstate on visual evoked potentials（VEPs） in diabetic rats.· METHODS： Wistar rats were randomly divided into three groups as normal control, diabetic control and diabetic rats treated with sodium tungstate. Diabetes was induced by single intraperitoneal injection of streptozotocin（50 mg/kg）. Sodium tungstate [40 mg/（kg·d）]was administered for 12 wk and then VEPs were ***, thiobarbituric acid reactive substance（TBARS） levels were measured in brain tissues.·RESULTS： The latencies of P1, N1, P2, N2 and P3 waves were significantly prolonged in diabetic rats compared with control group. Diabetes mellitus caused an increase in the lipid peroxidation process that was accompanied by changes in VEPs. However, prolonged latencies of VEPs for all components returned to control levels in sodium tungstate-treated group. The treatment of sodium tungstate significantly decreased brain TBARS levels and depleted the prolonged latencies of VEP components compared with diabetic control group.· CONCLUSION： Sodium tungstate shows protective effects on visual pathway in diabetic rats, and it can be worthy of further study for potential use.

关键词： diabetes retinopathy sodium tungstate visual evoked potentials lipid peroxidation

Chrysomya chani Kurahashi (Diptera: Calliphoridae), a blow fly species of forensic importance: morphological characters of the third larval instar and a case report from Thailand

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Forensic Sciences Research 2018年第1期3卷 83-93页

作者： Kabkaew L.Sukontason Tanin Bhoopat Anchalee Wannasan narin Sontigun Sangob Sanit Jens Amendt Chutharat Samerjai Kom Sukontason Department of Parasitology Faculty of MedicineChiang Mai UniversityChiang MaiThailand Department of Forensic Medicine Faculty of MedicineChiang Mai UniversityChiang MaiThailand Institute of Legal Medicine Forensic Biology/EntomologyGoethe-University FrankfurtFrankfurt am MainGermany

Blow flies are worldwide the most important insects from a forensic point of *** Thailand,aside from the two most common species,Chrysomya megacephala (F.) and Chrysomya rufifacies (Macquart),Chrysomya chani Kurahashi was also found to be of forensic *** present a case of a human female cadaver in its bloated stage of decomposition,discovered at Pachangnoi Subdistrict,northern *** sampling during the autopsy displayed an assemblage of numerous dipteran *** observations showed the coexistence of third instar larvae of the three blow flies ***,Chrysomya villeneuvi Patton,an unknown blow fly species and one muscid,Hydrotaea *** minimum post-mortem interval was estimated to be six days,based on the developmental rate of C *** ID of the unknown larva,which is the focus of this report,was revealed later as *** by DNA sequencing,using a 1205 bp of cytochrome c oxidase subunit Ⅰ (COⅠ).The occurrence of *** on a human body revealed the need to analyse and describe the morphology of its immature stage,to enable forensic entomologists to identify this fly species in future *** morphological examination of the third instar was performed,revealing peculiar characteristics: protuberant tubercles encircling abdominal segments;9-11 lobes on the anterior spiracle;six prominent pairs of tubercles along the peripheral rim of the eighth abdominal segment;a heavily sclerotized complete peritreme of the posterior spiracles.A key to differentiate the third instar of blow flies of forensic importance in Thailand is provided.

关键词： Forensic science forensic entomology Chrysomya chani larval morphology identification Thailand

Removal of Di-2-Ethyl Hexyl Phthalates by Membrane Bioreactor

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Journal of Environmental Protection 2013年第4期4卷 380-384页

作者： Salah Al Sakiti Suwanna Kitpati Boontanon narin Boontanon Civil and Environmental Engineering Department Faculty of Engineering Mahidol University Salaya Thailand Faculty of Environment and Resource Studies Mahidol University Salaya Thailand

A lab scale membrane bioreactor system was built to investigate the removal of Di-2-Ethyl Hexyl Phthalates (DEHP) in wastewater under variation of three runs: two hydraulic retention time (HRT) 24 and 36 hours in addition to two biomass: concentrated and light sludge. Solid phase extraction (SPE) followed by high performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS) was applied to quantitatively identify DEHP in wastewater samples. Membrane bioreactor was built and operated to investigate DEHP removal. Higher HRT removed DEHP more efficiently than lower HRT. The concentrated MLSS could achieve higher removal efficiency than the lighter MLSS at the same HRT value. The performance of MBR in removing DEHP, TOC and COD from wastewater with a maximum removal efficiency were 29%, 85%, and 98%, respectively. Mass balance of DEHP in the system indicated that a majority was removed by adsorption process rather than filtration or microbiological process.

关键词： DEHP LC-MS/MS Membrane Bioreactor (MBR) Solid Phase Extraction (SPE)