检索结果-南通市图书馆

Combustion characteristics of low-quality lignite for different bed material sphericities in a circulating fluidized bed boiler:A numerical study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2024年第7期90卷 364-382页

作者： Barış Gürel Gülşah karaca Dolgun Osman İpek Ali Keçebaş Department of Mechanical Engineering Engineering FacultySüleyman Demirel UniversityÇünürIspartaTurkey Department of Energy Systems Engineering Technology FacultyMuğla SıtkıKoçman UniversityKötekliMenteşeMuğlaTurkey

This study delves into the combustion behavior of various lignite types within a circulating fluidized bed boiler(CFBB),with a primary focus on the impact of different bed material sphericity ratios(0.5,0.7,and 0.9).Utilizing bed material with a sphericity ratio of 0.9 sourced from theÇan power plant and verified through experimentation,the research reveals several key ***,furnace temperatures tended to rise with higher sphericity ratios,albeit with variations between lignite types,particularly highlighting the complexity of this relationship in the case of GLI-Tunçbilek *** levels in the combustion chamber remained consistent across different sphericity ratios,indicating minimal influence on pressure *** combustion efficiency,especially at the bottom of the boiler,was observed at lower sphericity levels(0.5 and 0.7)forÇan lignite,as reflected in CO_(2) mole *** NO_(x) emissions generally decreased with lower sphericity,the sensitivity to sphericity varied by lignite type,with Ilgın lignite showcasing low NO_(x) but high SO_(2) emissions,underscoring the intricate interplay between lignite properties,sphericity,and ***,this study advances our understanding of CFBB combustion dynamics,offering insights valuable for optimizing performance and emissions control,particularly in lignite-based power.

关键词： Circulating fluidized bed boiler Computational particle fluid dynamics method Particle sphericity ratios NO_(x)and SO_(2)emissions Energy production efficiency

All-optical image denoising using a diffractive visual processor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第3期13卷 429-445页

作者： Çağatay Işıl Tianyi Gan Fazil Onuralp Ardic Koray Mentesoglu Jagrit Digani Huseyin karaca Hanlong Chen Jingxi Li Deniz Mengu Mona Jarrahi Kaan Akşit Aydogan Ozcan Electrical and Computer Engineering Department University of CaliforniaLos AngelesCA 90095USA Bioengineering Department University of CaliforniaLos AngelesCA 90095USA California NanoSystems Institute(CNSI) University of CaliforniaLos AngelesCA 90095USA University College London Department of Computer ScienceLondonUnited Kingdom

Image denoising,one of the essential inverse problems,targets to remove noise/artifacts from input *** general,digital image denoising algorithms,executed on computers,present latency due to several iterations implemented in,e.g.,graphics processing units(GPUs).While deep learning-enabled methods can operate non-iteratively,they also introduce latency and impose a significant computational burden,leading to increased power ***,we introduce an analog diffractive image denoiser to all-optically and non-iteratively clean various forms of noise and artifacts from input images–implemented at the speed of light propagation within a thin diffractive visual processor that axially spans<250×λ,whereλis the wavelength of *** all-optical image denoiser comprises passive transmissive layers optimized using deep learning to physically scatter the optical modes that represent various noise features,causing them to miss the output image Field-of-View(FoV)while retaining the object features of *** results show that these diffractive denoisers can efficiently remove salt and pepper noise and image rendering-related spatial artifacts from input phase or intensity images while achieving an output power efficiency of~30–40%.We experimentally demonstrated the effectiveness of this analog denoiser architecture using a 3D-printed diffractive visual processor operating at the terahertz *** to their speed,power-efficiency,and minimal computational overhead,all-optical diffractive denoisers can be transformative for various image display and projection systems,including,e.g.,holographic displays.

关键词： remove rendering holographic

Mapping of energy potential through annual crop residues in Turkey

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2015年第2期8卷 104-109,I0001页

作者： Cengiz karaca Department of Biosystems Engineering Faculty of AgricultureMustafa Kemal UniversityAntakyaHatay31040Turkey

The objective of this study was to determine the annual crop residue potential in terms of types,quantities and mapping in *** calorific values of agricultural residues were determined by calorimeter according to ASTM D 5865 Standard Test Method for Coal and Coke *** this study,the energy potential of annual crop residues was evaluated by ArcGIS^(TM) which is a geographical information system *** total amount of unused annual crop residues was approximately 15.24 Mt/*** was found that the total calorific value of the field crop residues was around 268 PJ/a for the 2012 production period in *** major crops included in the ratio of the total calorific value were maize(45.81%),wheat(21.30%),sunflower(15.10%)and cotton(18.1%).The amount of CO_(2) emitted into the atmosphere can be reduced by 30 Mt/a year through the use of agricultural residues.

关键词： agricultural residue exploitable energy potential mapping GIS Turkey

Determination of biogas production potential from animal manure and GHG emission abatement in Turkey

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2018年第3期11卷 205-210页

作者： Cengiz karaca Mustafa Kemal University Faculty of AgricultureDepartment of Biosystems EngineeringHatay 31040Turkey

This study was aimed to determine biogas amount and the energy value which could be made from animal manure in *** this purpose,biogas potential was calculated with the number of dairy cattle and laying hens taking into consideration,which have high availability *** has a total of about 8.9 million dairy cattle and 98 million laying *** total 92.1 million tons of manure is obtained from these *** are 89.2 million tons of cattle manure and 2.9 million tons of laying hens *** 1.6 billion m3 of biogas can be produced from the usable amount of this *** heating value of biogas produced from this manure is about 36.7 *** values can provide 1.1%of Turkey’s annual energy consumption(80.5 Mtoe).The distribution of these calculated data by province was mapped using a GIS Software’s mapping *** provinces are ranked according to the amount of biogas production,the top 10 are Konya,Erzurum,İzmir,Balıkesir,Kars,Afyon,Diyarbakır,Aydın,Ankara and Ağrı.Furthermore,the greenhouse gas(GHG)emission abatement was calculated for demonstrating the environmental benefits of the biogas production from animal *** was determined that the CO2 emission abatement annually ranging between 17.2-25.3 million tons could be provided with the evaluation of biogas potential which was calculated.

关键词： biogas biogas production potential animal manure GHG emission Turkey

A cross-layer fault tolerance management module for wireless sensor networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第9期13卷 660-673页

作者： Ozlem karaca Radosveta SOKULLU Izmir Vocational School Dokuz Eylul UniversityIzmir 35160Turkey Department of Electrical and Electronics Engineering Ege UniversityIzmir 35100Turkey

It is a well-established fact that wireless sensor networks (WSNs) are very power constraint networks, but besides this, they are inherently more fault-prone than any other type of wireless network and their protocol design is very application specific. Major reasons for the faults are the unpredictable wireless communication channel, battery depletion, as well as fragility and mobility of the nodes. Furthermore, as traditional protocol design methods have proved inadequate, the cross-layer design (CLD) approach, which allows for interactions between different layers, providing more flexible and energy-efficient functionality, has emerged as a viable solution for WSNs. In this study we define a fault tolerance management module suitable to the requirements, limitations, and specifics of WSNs, encompassing methods for fault detection, fault prevention, fault management, and recovery. The suggested solution is in line with the CLD approach, which is an important factor in increasing the network performance. Through simulations the functionality of the network is evaluated, based on packet loss, delay, and energy consumption, and is compared with a similar solution not including fault management. The results achieved support the idea that the introduction of a unified approach to fault management improves the network performance as a whole.

关键词： Wireless sensor networks (WSNs) Cross-layer frameworks Protocol design Fault management

Application of Markovian models for non-ergodic and non-stationary earthquake times series for the identification of seismic patterns and future projections

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

Earthquake Science 2020年第2期33卷 98-106页

作者： Hakan karaca Department of Architecture Omer Halisdemir UniversityNigde 51240Turkey

The current earthquake forecast algorithms are not free of shortcomings due to inherent ***,the requirement of stationarity in the evaluation of earthquake time series as a prerequisite,significantly limits the use of forecast algorithms to areas where stationary data is not *** shortcoming of forecast algorithms is the ergodicity assumption,which states that certain characteristics of seismicity are spatially *** this study,a new earthquake forecast approach is introduced for the locations where stationary data are not *** this purpose,the spatial activity rate density for each spatial unit is evaluated as a parameter of a Markov *** temporal pattern is identified by setting the states at certain spatial activity rate *** using the transition patterns between the states,1-and 5-year forecasts were *** method is suggested as an alternative and complementary to the existing methods by proposing a solution to the issues of ergodicity and stationarity assumptions at the same time.

关键词： spatial pattern Markov chain spatially smoothed seismicity seismic activity rate

Urine products of bone breakdown as markers of bone resorption and clinical usefulness of urinary hydroxyproline:an overview

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

Chinese Medical Journal 2004年第2期17卷 291-295页

作者： Baris Simsek zgülkaracaer inci karaca Department of Oral and Maxillofacial Surgery Faculty of Dentistry University of Gazi Emek Ankara TurkeyDepartment of Oral and Maxillofacial Surgery Faculty of Dentistry University of Gazi Emek Ankara TurkeyDepartment of Prosthodontics Faculty of Dentistry University of Gazi Emek Ankara Turkey

Purpose The purpose of this study is to review the urine products of bone breakdown as markers of bone resorption and usefulness of urinary hydroxyproline.Data Related researches published in 1985 -2000 were systematically reviewed.Results Bone markers could be used for early diagnosis of bone metabolic diseases. Biochemical markers of bone resorption that reflect osteoclast activity and/or collagen degradation provide a new and potentially important clinical tool for the assessment and monitoring of bone metabolism. Assessment of bone resorption can be achieved with measurement of urinary hydroxylysine glycosides, urinary excretion of the collagen pyridinium cross-links, urinary excretion of type I collagen telopeptide breakdown products (cross-linked telopeptides) and urinary hydroxyproline.Conclusion Urinary hydroxyproline has been in use as a marker of bone resorption, but it lacks sensitivity and specificity. It is a modified aminoacid that is a metabolic product of collagen breakdown. Hydroxyproline may be released either free or with fragments of the collagen molecule attached during bone resorption, and it is also liberated by the breakdown of complement and nonskeletal collagen.

关键词： bone resorption marker biochemical markers hydroxyproline collagen breakdown hydroxylysine glycosides pyrolidine deoxypyrolidine N-tebpeptides C-telopeptides

Dexmedetomidine-induced polyuria in the intensive care unit: a case report

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

Emergency and Critical Care Medicine 2023年第2期3卷 81-83页

作者： Nurcan Kutluer karaca Department of Anesthesiology and Reanimation Erzincan Binali Yildirim University Faculty of MedicineMengucekgazi Education and Training HospitalErzincanMerkezTurkey

Dexmedetomidine is anα2 agonist that is frequently used for sedation in intensive care units(ICUs).Hypotension and bradycardia are common adverse effects observed in clinical *** perioperative conditions,polyuria is a rare adverse effect with limited case reports after dexmedetomidine *** to this situation,in ICU,there are rare *** present the case of a 59-year-old man who developed polyuria secondary to high-dose intravenous dexmedetomidine infusion in the medical ICU.

关键词： Case report Dexmedetomidine Diabetes insipidus Polyuria

Role of insulin and insulin resistance in androgen excess disorders

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Diabetes 2021年第5期12卷 616-629页

作者： Kursad Unluhizarci Zuleyha karaca Fahrettin Kelestimur Department of Endocrinology Erciyes University Medical SchoolKayseri38039Turkey Department of Endocrinology Yeditepe University Medical SchoolIstanbul34755Turkey

Insulin has complex effects on cell growth,metabolism and differentiation,and these effects are mediated by a cell-surface bound receptor and eventually a cascade of intracellular signaling *** the several metabolic and growth-promoting effects of insulin,insulin resistance is defined as an attenuated effect of insulin on glucose metabolism,primarily the limited export of blood glucose into skeletal muscle and adipose *** the other hand,not all the signaling pathways and insulin-responsive tissues are equally affected,and some effects other than the metabolic actions of insulin are *** and the adrenal glands are two examples of tissues remaining sensitive to insulin actions where insulin may contribute to increased androgen *** ovary syndrome(PCOS)is the most common form of androgen excess disorder(AED),and its pathogenesis is closely associated with insulin *** with idiopathic hirsutism also exhibit insulin resistance,albeit lower than patients with *** it is not as evident as in PCOS,patients with congenital adrenal hyperplasia may have insulin resistance,which may be further exacerbated with glucocorticoid overtreatment and *** patients with severe insulin resistance syndromes,irrespective of the type of disease,hyperinsulinemia promotes ovarian androgen synthesis independently of *** is highly debated in whom and how insulin resistance should be diagnosed and treated among patients with AEDs,including *** is not suitable to administer an insulin sensitizer relying on only some mathematical models used for estimating insulin ***,the treatment decision should be based on the constellation of the signs,symptoms and presence of obesity;acanthosis nigricans;and some laboratory abnormalities such as impaired glucose tolerance and impaired fasting glucose.

关键词： Insulin Insulin resistance Hyperinsulinemia Hyperandrogenism Androgen excess