检索结果-南通市图书馆

Journal of Modern Power Systems and Clean Energy 2021年第1期9卷 199-209页

作者： Muhammad Najwan Hamidi Dahaman Ishak Muhammad Ammirrul Atiqi Mohd Zainuri Chia Ai Ooi tarmizi tarmizi the School of Electrical and Electronic Engineering Universiti Sains MalaysiaNi-bong TebalMalaysia the Department of Electrical Electronic and System EngineeringUniversiti Kebangsaan MalaysiaBangiMalaysia the Department of Electrical Engineering University Syiah KualaBanda AcehIndonesia

In this paper, a perturb and observe(P&O) based voltage regulator(POVR) and a capacitor compensator(CC)circuit are proposed for the implementation on 31-level asymmetrical switch-diode based multi-level DC-link(MLDCL) inverter. Since the application of MLDCL in a standalone photovoltaic(PV) system requires constant DC voltages from PV panels, the POVR strategy is deployed to regulate the voltage along with the capability to deliver the maximum power at full *** DC-DC converters are used as the interface between the panels and the inverter for the POVR operation. The results show that POVR is capable of achieving the desired fixed DC voltages even under varying environmental and load conditions,with a steady 230 V at the output. At full load, the standalone system successfully delivers 97.21% of the theoretical maximum power. Additionally, CC is incorporated to mitigate voltage spikes at the output when supplying power to inductive *** successfully eliminates the spikes and also reduces the total harmonic distortion(THD) of output current and voltage from more than 10% to less than 5%, as recommended in IEEE 519 standard.

关键词： Multi-level inverter photovoltaic(PV)system maximum power point voltage regulator capacitor compensator(CC)

Improvement on the Multihop Shareholder Discovery for Threshold Secret Sharing in MANETs

在线全文

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2011年第4期26卷 711-721页

作者： Seleviawati tarmizi Prakash Veeraraghavan Somnath Ghosh Department of Computer Science and Computer Engineering La Trobe University

The collaboration of at least a threshold number of secret shareholders in a threshold secret sharing scheme is a strict requirement to ensure its intended functionality. Due to its promising characteristics, such a scheme has been proposed to solve a range of security problems in mobile ad hoc networks. However, discovering a sufficient number of secret shareholders in such dynamic and unpredictable networks is not easy. In this paper, we propose a more efficient shareholder discovery mechanism compared to our previous work. The discovery process is performed in a multihop fashion to adapt to the mobile ad hoc network environment. We introduce batch extension that gradually extends the shareholders＇ collaboration boundary by more than one hop at a time around the service requestor, to find at least the threshold number of the unknown shareholders. Through the batch extension, reply aggregation is applicable, hence reducing the redundancy use of reply routes, decreasing the required packet transmission, and lessening the service delay, compared to the previously proposed mechanism. Our simulation results show that, with the appropriate batch size, the latest mechanism is more efficient with an insignificant increase of control overhead.

关键词： multihop shareholder discovery threshold secret sharing multihop secret sharing

Application of deep learning in iron ore sintering process:a review

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2024年第5期31卷 1033-1049页

作者： Yu-han Gong Chong-hao Wang Jie Li Muhammad Nasiruddin Mahyuddin Mohamad tarmizi Abu Seman School of Electrical and Electronic Engineering Universiti Sains Malaysia14300 Nibong TebalPenangMalaysia College of Electrical Engineering North China University of Science and TechnologyTangshan 063210HebeiChina Technology Transfer Center North China University of Science and TechnologyTangshan 063210HebeiChina School of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210HebeiChina

In the wake of the era of big data,the techniques of deep learning have become an essential research direction in the machine learning field and are beginning to be applied in the steel *** sintering process is an extremely complex industrial *** the main process of the blast furnace ironmaking industry,it has great economic value and environmental protection significance for iron and steel *** is also one of the fields where deep learning is still in the exploration *** order to explore the application prospects of deep learning techniques in iron ore sintering,a comprehensive summary and conclusion of deep learning models for intelligent sintering were presented after reviewing the sintering process and deep learning models in a large number of research ***,the mechanisms and characteristics of parameters in sintering processes were introduced and analysed in detail,and then,the development of iron ore sintering simulation techniques was ***,deep learning techniques were introduced,including commonly used models of deep learning and their ***,the current status of applications of various types of deep learning models in sintering processes was elaborated in detail from the aspects of prediction,controlling,and optimisation of key *** speaking,deep learning models that could be more effectively implemented in more situations of the sintering and even steel industry chain will promote the intelligent development of the metallurgical industry.

关键词： Deep learning Sintering process Modelling Simulation technology Intelligent sintering

Effects of Lateral Variation in Vegetation and Basin ‘Dome' Shape on Tropical Lowland Peat Stabilisation in the Kota Samarahan-Asajaya Area, West Sarawak, Malaysia

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

Acta Geologica Sinica(English Edition) 2014年第3期88卷 894-914页

作者： Mohamad tarmizi Mohamad ZULKIFLEY Tham Fatt NG John Kuna RAJ Roslan HASHIM Muhammad Aqeel ASHRAF Department of Geology Faculty of Science University of Malaya Department of Civil Engineering Faculty of Science University of Malaya

Field surveys indicate lateral variation in peat humification levels （von Post） in dominantly occurring fibric,fibric to hemic,sapric and hemie to sapric peats across a gradient from the margin towards the centre of tropical lowland peat ***-peat stabilisation can be enhanced by adding mineral soil fillers （silt,clays and fine sands） obtained from Quaternary floodplain deposits and residual soil （weathered schist）.The unconfined compressive strength （UCS） of the stabilised cement-mineral soil fifler-peat mix increases with the increased addition of selected mineral soil *** variation in the stabilised peat strength （UCS） in the top 0 to 0.5 m layer was found from the margin towards the centre of the tropical lowland peat *** variations in the UCS of stabilised tropical lowland peats along a gradient from the periphery towards the centre of the peat dome are most likely caused by a combination of factors due to variations in the mineral soil or ash content of the peat and horizontal zonation or lateral variation in the dominant species of the plant assemblages （due to successive vegetation zonation of the peat swamp forest from the periphery towards the centre of the tropical lowland peat dome）.

关键词： tropical lowland peat dome/basin mineral soil filler cement-filler-peat stabilisation,topogenic unconfined compressive strength lateral vegetation succession.

Secondary sex ratio of assisted reproductive technology babies

在线全文

学校读者我要写书评

暂无评论

Asian pacific Journal of Reproduction 2019年第2期8卷 88-92页

作者： Nathira Abdul Majeed Charley Zheng Alex Polyakov Megan Pucci Mohamed Hatta tarmizi Mie Mie Cho Win Royal Women's Hospital MelbourneVictoriaAustralia Royal Women's Hospital and Melbourne IVF MelbourneVictoriaAustralia Oceania University of Medicinea Australia Sabah Women's and Children's Hospital Kota KinabaluSabahMalaysia Obstetrics&Gynaecology Department International Medical SchoolManagement&Science UniversitySelangorMalaysia

Objective: To assess the secondary sex ratio (SSR) of assisted reproduction technology babies within a fertility clinic in Melbourne, Australia. Methods: A retrospective cohort study was conducted on 3369 babies who were born following single embryo transfer between 2011 and 2016. Variables examined included embryo creation date, maternal and paternal ages, maternal body mass index (BMI), type of infertility, sperm parameters, fertilization method, type of embryo and stage of transfer. Multivariate regression analysis was performed on the data set using STRATA V9.2. Results: More males were found to be born to embryos created in summer (adjusted odds ratio=1.46, 95% confidence interval: 1.08-1.95;P=0.01). Lower BMI of mother (≤30 kg/m 2) and younger age of parents (≤35 years) were associated with an increase in SSR (50.1% vs. 47.1%;50.6% vs. 48.8%;50.0% vs. 48.9%) respectively. Decreased SSR value was associated with primary subfertility, using in-vitro fertilization procedure and fresh embryo compared to those with secondary subfertility, using intracytoplasmic sperm injection procedure and thawed embryo (49.3% vs. 50.6%;47.1% vs. 50.8%;49.4% vs. 50.1%) respectively. Conclusions: The fertilization methods, type of embryo, stage of embryo transfer, parameters of the sperm and status of subfertility do not significantly affect the SSR. SSR is affected by the seasonality, maternal age, and BMI.

关键词： Artificial reproduction technology Intracytoplasmic sperm injection In-vitro fertilization Secondary sex ratio

Integrated adsorption and photocatalytic removal of methylene blue dye from aqueous solution by hierarchical Nb_(2)O_(5)@PAN/PVDF/ANO composite nanofibers

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

Nano Materials Science 2024年第1期6卷 96-105页

作者： Aditya Rianjanu Kurniawan Deny Pratama Marpaung Elisabeth Kartini Arum Melati Rizky Aflaha Yudha Gusti Wibowo I Putu Mahendra Nursidik Yulianto Januar Widakdo Kuwat Triyana Hutomo Suryo Wasisto tarmizi Taher Department of Materials Engineering Institut Teknologi SumateraTerusan RyacuduWay HuiJati AgungLampung Selatan35365Indonesia Center for Green and Sustainable Materials Institut Teknologi SumateraTerusan RyacuduWay HuiJati AgungLampung Selatan35365Indonesia Department of Environmental Engineering Institut Teknologi SumateraTerusan RyacuduWay HuiJati AgungLampung Selatan35365Indonesia Department of Physics Faculty of Mathematics and Natural SciencesUniversitas Gadjah MadaSekip Utara PO Box BLS 21Yogyakarta55281Indonesia Department of Mining Engineering Institut Teknologi SumateraTerusan RyacuduWay HuiJati AgungLampung Selatan35365Indonesia Department of Chemistry Institut Teknologi SumateraTerusan RyacuduWay HuiJati AgungLampung Selatan35365Indonesia Research Center for Photonics National Research and Innovation Agency(BRIN)Kawasan Puspitek SerpongTangerang Selatan15314Indonesia Department of Physics Faculty of Mathematics and Natural SciencesUniversitas IndonesiaDepok16424Indonesia PT Nanosense Instrument Indonesia UmbulharjoYogyakarta55167Indonesia Department of Chemical Engineering Faculty of EngineeringUniversitas Gadjah MadaJl Grafika No.2Yogyakarta55281Indonesia

This work presents the development of hierarchical niobium pentoxide(Nb_(2)O_(5))-based composite nanofiber membranes for integrated adsorption and photocatalytic degradation of methylene blue(MB)pollutants from aqueous *** Nb_(2)O_(5) nanorods were vertically grown using a hydrothermal process on a base electrospun nanofibrous membrane made of polyacrylonitrile/polyvinylidene fluoride/ammonium niobate(V)oxalate hydrate(Nb_(2)O_(5)@PAN/PVDF/ANO).They were characterized using field-emission scanning electron microscopy(FE-SEM),X-ray diffraction(XRD)analysis,and Fourier transform infrared(FTIR)*** composite nanofibers possessed a narrow optical bandgap energy of 3.31 eV and demonstrated an MB degradation efficiency of 96%after 480 min contact *** pseudo-first-order kinetic study was also conducted,in which Nb_(2)O_(5)@PAN/PVDF/ANO nanofibers have kinetic constant values of 1.29×10^(-2) min^(-1) and 0.30×10^(-2) min^(-1) for adsorption and photocatalytic degradation of MB aqueous solutions,*** values are 17.7 and 7.8 times greater than those of PAN/PVDF/ANO nanofibers without Nb_(2)O_(5) *** their outstanding photocatalytic performance,the developed membrane materials exhibit advantageous characteristics in recycling,which subsequently widen their practical use in environmental remediation applications.

关键词： Hierarchical nanostructure Composite nanofiber Niobium pentoxide Dye degradation Synergetic adsorption and photocatalysis

Fenofibrate for the prevention of progression of non-proliferative diabetic retinopathy:review,consensus recommendations and guidance for clinical practice

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2022年第12期15卷 2001-2008页

作者： Nor Fariza Ngah Nor Asiah Muhamad Roslin Azni Abdul Aziz Shelina Oli Mohamed Nor Azita Ahmad tarmizi Azian Adnan Zalifah Zakiah Asnir Zanariah Hussein Hui Foo Siew Masni Mohamed Noor Aliza Lodz Vijayamala Valayatham Institute for Clinical Research National Institutes of HealthSetia AlamSelangor 40790Malaysia Hospital Shah Alam Selangor 40000Malaysia Sector for Evidence-Based Healthcare National Institutes of HealthSetia AlamSelangor 40790Malaysia Hospital Kuala Lumpur Wilayah Persekutuan Kuala Lumpur 50586Malaysia Hospital Selayang Selangor 68100Malaysia Hospital Ampang Selangor 68000Malaysia Hospital Putrajaya Wilayah Persekutuan Putrajaya 62250Malaysia Institute for Public Health National Institutes of HealthSetia AlamSelangor 40790Malaysia

The prevalence of diabetic retinopathy(DR),and associated morbidity is high in the Asia-Pacific *** evidence suggests a potential role for fenofibrate in the prevention of progression of DR,especially in patients with cardiovascular risk,and pre-existing mild-to-moderate *** has also been found to reduce maculopathy,and the need for laser treatment in these *** these benefits of fenofibrate,a group of experts from the fields of endocrinology and ophthalmology convened in May 2017,to discuss on the the mechanism of action,and clinical efficacy of fenofibrate in *** findings from key clinical studies on fenofibrate in DR were reviewed by the experts,and consensus statements were derived to define the role of fenofibrate in the prevention and treatment of *** statements were rated based on the GRADE *** algorithm was also developed for the screening and treatment of DR in patients with type 2 diabetes(T2D),and the place of fenofibrate was defined in the *** expert recommendations,and the algorithm provided in this review will serve as a guide to the clinicians to reconsider the adjunctive use of fenofibrate for preventing the progression of DR in selected T2D patients.

关键词： diabetic retinopathy fenofibrate consensus recommendations