检索结果-南通市图书馆

International Journal of Coal Science & Technology 2023年第5期10卷 57-71页

作者： A.n.Kozlov e.p.Maysyuk I.Yu.Ivanova Melentiev energy Systems Institute of Siberian Branch of the Russian Academy of Sciences Irkutsk130Lermontov664033Russia

The purpose of this article is to receive environmental assessments of combustion of different types of coal fuel depending on the preparation(unscreened,size-graded,briquetted and heat-treated)in automated boilers and boilers with manual *** assessments were made on the basis of data obtained from experimental methods of coal preparation and calculated methods of determining the amount of pollutant and greenhouse gas emissions,as well as the mass of ash and slag *** main pollutants from coal combustion are calculated:particulate matter,benz(a)pyrene,nitrogen oxides,sulfur dioxide,carbon *** the greenhouse gases carbon dioxide is *** a result of conducted research it is shown that the simplest preliminary preparation(size-graded)of coal significantly improves combustion efficiency and environmental performance:emissions are reduced by 13%for hard coal and up to 20%for brown *** introduction of automated boil-ers with heat-treated coal in small boiler facilities allows to reduce emissions and ash and slag waste by 2-3 *** best environmental indicators correspond to heat-treated lignite,which is characterized by the absence of sulfur dioxide emissions.

关键词： Coal preparation Automated and hand-fed coal boilers environmental performance metrics

Metasomatic origin of garnet xenocrysts from the *** kimberlite pipe,Arkhangelsk region,nW Russia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geoscience Frontiers 2017年第4期8卷 641-651页

作者： e.V.Shchukina A.M.Agashev n.p.pokhilenko Sobolev Institute of Geology and Mineralogy Siberian Branch Russian Academy of Sciences

This paper presents new major and trace element data from 150 garnet xenocrysts from the *** kimberlite pipe located in the central part of the Arkhangelsk diamondiferous province（ADp）.Based on the concentrations of Cr_2O_3,CaO,TiO_2 and rare earth elements（Ree） the garnets were divided into seven groups：（1） lherzolitic ＂depleted＂ garnets（＂Lz 1＂）,（2） lherzolitic garnets with normal Ree patterns（＂Lz2＂）,（3） lherzolitic garnets with weakly sinusoidal Ree patterns（＂Lz 3＂）,（4） lherzolitic garnets with strongly sinusoidal Ree patterns（＂Lz 4＂）,（5） harzburgitic garnets with sinusoidal Ree patterns（＂Hz＂）,（6）wehrlitic garnets with weakly sinusoidal Ree patterns（＂W＂）,（7） garnets of megacryst paragenesis with normal Ree patterns（＂Meg＂）.Detailed mineralogical and geochemical garnet studies and modeling results suggest several stages of mantle metasomatism influenced by carbonatite and silicate *** metasomatism at the first stage resulted in refertilization of the lithospheric mantle,which is evidenced by a nearly vertical CaO-Cr_2O_3 trend from harzburgitic（＂Hz＂） to lherzolitic（＂Lz 4＂） garnet *** garnets（＂Hz＂） have probably been formed by interactions between carbonatite melts and exsolved garnets in high-degree melt extraction *** the second stage of metasomatism,garnets with weakly sinusoidal Ree patterns（＂Lz 3＂, ＂W＂） were affected by a silicate melt possessing a Ree composition similar to that of ADp alkaline mica-poor *** the last stage,the garnets interacted with basaltic melts,which resulted in the decrease CaO-Cr_2O_3 trend of ＂Lz 2＂ garnet ***-poor garnets of megacryst paragenesis（＂Meg＂） could crystallize directly from the silicate melt which has a Ree composition close to that of ADp alkaline mica-poor picrites.p-T estimates of the garnet xenocrysts indicate that the interval of-60-110 km of the lithospheric mantle beneath the *** pipe was predominantly affected by the silicate melts,wherea

关键词： Lithospheric mantle Mantle xenolith Lherzolite-harzburgite-wehrlite-megacryst paragenesis Trace element Major element Kimberlite

Recent Advancements in the Optimization Capacity Configuration and Coordination Operation Strategy of Wind-Solar Hybrid Storage System

在线全文

学校读者我要写书评

暂无评论

energy engineering 2025年第1期122卷 285-306页

作者： Hongliang Hao Caifeng Wen Feifei Xue HaoQiu ning Yang Yuwen Zhang Chaoyu Wang edwin e.nyakilla Department of new energy Storage Peking University Ordos Research Institute of EnergyOrdos017010China School of energy and power engineering Inner Mongolia University of TechnologyHohhot010080China Key Laboratory of Wind energy and Solar energy Utilization Technology Inner Mongolia University of TechnologyHohhot010051China

present of wind power is sporadically and cannot be utilized as the only fundamental load of energy *** paper proposes a wind-solar hybrid energy storage system(HeSS)to ensure a stable supply grid for a longer period.A multi-objective genetic algorithm(MOGA)and state of charge(SOC)region division for the batteries are introduced to solve the objective function and configuration of the system capacity,***/Simulink was used for simulation *** optimization results show that for a 0.5 MW wind power and 0.5 MW photovoltaic system,with a combination of a 300 Ah lithium battery,a 200 Ah lead-acid battery,and a water storage tank,the proposed strategy reduces the system construction cost by approximately 18,000 ***,the cycle count of the electrochemical energy storage systemincreases from4515 to 4660,while the depth of discharge decreases from 55.37%to 53.65%,achieving shallow charging and discharging,thereby extending battery life and reducing grid voltage fluctuations *** proposed strategy is a guide for stabilizing the grid connection of wind and solar power generation,capability allocation,and energy management of energy conservation systems.

关键词： electric-thermal hybrid storage modal decomposition multi-objective genetic algorithm capacity optimization allocation operation strategy

protective effect of Liposomal α-Tocopherol Against Bleomycin-induced Lung Injury

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biomedical and environmental Sciences 1997年第1期10卷 47-59页

作者： Z·e·SUnTReS p·n·SHeK OperationalMedicineSector DefenceandCivilInstituteofEnviron－mentalMedicineNorthYork Towhomcorreponde

The clinical use of bleomycin in the treatment of squamous cell carcinomas, lymphomas and testicular tumours has been limited by its toxic effects, the most serious being pulmonary injury. The present study was undertaken to invesigate whether α-tocopherol, incorprated in liposomes and delivered directly to the lung, could offer protection against bleomycin-induced lung damage and fibrosis in the rat. Animals were administered, intratracheally, plain lipo somes (composed of dipalmitoylphosphatidylcholine, DppC ) or α- tocopherol-containing lipo somes (8 mg Q-tocopherol/kg body weight) and 30 min later, were exposed to bleomycin sul phate (4 units/kg body weight) by intratracheal instillation; treated animals were killed 21 days later. Results of this study showed that lungs of animals treated with bleomycin were se riously damaged, as evidenced by significant histological changes and increases in lung weight,lipid peroxidation, myeloperoxidase activity and hydroxyproline content as well as decreases in lung angiotensin converting enzyme (ACe) and alkaline phosphatase (AKp) activities. pre treatment of rats with plain liposomes alone did not alter significantly the bleomycin-induced changes of all parameters examined. In contrast, pretreatment of rats with α-tocopherol lipo somes 30 min prior to bleomycin administration resulted in little or no histological changes and conferred a significant protection against bleomycin-induced changes in edema, lipid peroxida tion, hydroxyproline content, and ACe, AKp and myeloperoxidase activities. Results of this study suggested that pretreatment of rats with α-tocopherol liposomes can provide a significant protection against bleomycin-induced lung injury

关键词： lung protective effect of Liposomal Tocopherol Against Bleomycin-induced Lung Injury

plinthite and Its Associated evolutionary Forms in Soils and Landscapes:A Review

在线全文

学校读者我要写书评

暂无评论

pedosphere 2014年第2期24卷 153-166页

作者： p.n.eZe T.K.UDeIGWe M.e.MeADOWS Department of environmental & Geographical Science University of Cape Town Department of plant and Soil Science Texas Tech University

At elevated temperature regimes and abundant precipitation, mobilization and accretion of weathered iron oxides are promoted especially in a reduced environments in the tropics. This may lead to the formation of plinthite, which hardens irreversibly upon repeated wetting and drying to form petroplinthite. The need for this review stems from the seemingly dearth of information on the subject and a need to clarify different terms used in describing plinthite. We review various research works on plinthite and its associated pedogenic forms in the tropics. Furthermore, we proffer recommendations as to the most appropriate land use management practices that could help minimise the environmental and agronomic problems associated with plinthite and its related pedogenic forms. parent material, temperature, seasonality and geomorphology are critical factors that influence soil water regime which in turn affect the pedogenesis of plinthite. Soil pH and mineralogy are additional factors that could also promote plinthite formation. Fossil plinthic soils are potential proxies for palaeoenvironmental reconstruction. Measures used in the management of plinthic soils include mechanically breaking the hardpans and the use of organic and inorganic amendments to modify the structure and chemistry of the soils. Avoidance of practices that would predispose soils to erosion would also prevent plinthization. We call for the relinquishment of the term ＂[aterite＂ which is a generM term for all forms of iron oxide-enriched earthy materials as used for plinthite. plinthic horizon should also be incorporated into the United States Department of Agriculture Soil Taxonomy in view of its growing importance in soils.

关键词： agronomy pedogenesis petroplinthite soil taxonomy tropics

Development of Zeff diagnostic system on the Globus-M（M2） tokamak and the first experimental results

在线全文

学校读者我要写书评

暂无评论

plasma Science and Technology 2019年第10期21卷 33-39页

作者： e A TUKHMeneVA S Yu TOLSTYAKOV G S KURSKIeV V K GUSeV V B MInAeV Yu V peTROV n V SAKHAROV A Yu TeLnOVA n n BAKHAReV p B SHeGOLeV e O KISeLeV Ioffe Institute

Studying the behavior of effective ion charge Zeff, which indicates the degree of pollution of plasma and can provide valuable information about many processes taking place in plasma, mechanisms of the releasing impurities, transport, etc is of great interest. This paper describes the development of the Zeff diagnostic system for the Globus-M2 tokamak. The effective ion charge is determined on the basis of measurements of the bremsstrahlung intensity and Thomson scattering data-Te and ne profiles. The results of the first Zeff measurements obtained for several discharges on the Globus-M tokamak are presented in this paper. The results have been validated by simulation using the ASTRA transport code for the same discharges, and it has demonstrated a good agreement with the experimental results.

关键词： tokamak effective ion charge magnetic confinement

Assessment of accuracy of modal parameters of a rotor dynamic system using different types of finite elements

在线全文

学校读者我要写书评

暂无评论

International Journal of Modeling, Simulation, and Scientific Computing 2018年第1期9卷 46-56页

作者： e.S.Ramasubramaniam p.R.Thyla n.Mahendrakumar Department of Mechanical engineering pSG College of Technology Coimbatore 641004 Tamil NaduIndia

The main objective of this work is to check the compatibility of Finite element method(FeM)to determine the modal parameters of the rotor system and to compare the results with analytical *** work is an attempt to implement different finite element(Fe)models for the estimation of modal *** different order elements from Beam,Axisymmetric and Solid Fe models are *** analysis is carried out on the rotor system and the accuracy of the results and the computation time of the Fe models are *** Fe results are compared with the analytical *** is observed that Fe model can be used to simulate even at higher order frequencies,which is a limitation of analytical *** analysis shows that the Fe results closely match with analytical method and also the study summarizes that proper choosing of Fe helps in developing rotor models in both a desirable accuracy and ***,a Campbell diagram is generated using the analytical method and *** critical speeds are also calculated from the Campbell *** closeness of the results between the two methods is checked.

关键词： natural frequency meshing convergence test finite element method Campbell diagram

Three-dimensional models:from cell culture to patient-Derived Organoid and its application to future liposarcoma research

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Oncology Research 2025年第1期33卷 1-13页

作者： SAYUMI TAHARA SYDneY RenTSCH FeRnAnDA COSTAS CASAL De FARIA pATRICIA SARCHeT ROMA KARnA FeDeRICA CALORe RApHAeL e.pOLLOCK Department of Surgery Division of Surgical OncologyThe James Comprehensive Cancer CenterThe Ohio State University Wexner Medical CenterColumbusOH 43210USA Department of Cancer Biology and Genetics The James Comprehensive Cancer CenterThe Ohio State University Wexner Medical CenterColumbusOH 43210USA

Liposarcoma is one of the most common soft tissue sarcomas,however,its occurrence rate is still rare compared to other *** to its rarity,in vitro experiments are an essential approach to elucidate liposarcoma *** cell culture-based research(2D cell culture)is still playing a pivotal role,while several shortcomings have been recently under *** vivo,mouse models are usually adopted for pre-clinical analyses with expectations to overcome the issues of 2D cell ***,they do not fully recapitulate human dedifferentiated liposarcoma(DDLpS)***,three-dimensional(3D)culture systems have been the recent research focus in the cell biology field with the expectation to overcome at the same time the disadvantages of 2D cell culture and in vivo animal models and fill in the gap between *** the liposarcoma rarity,we believe that 3D cell culture techniques,including 3D cell cultures/co-cultures,and patient-Derived tumor Organoids(pDOs),represent a promising approach to facilitate liposarcoma investigation and elucidate its molecular mechanisms and effective therapy *** this review,we first provide a general overview of 3D cell cultures compared to 2D cell *** then focus on one of the recent 3D cell culture applications,patient-Derived Organoids(pDOs),summarizing and discussing several pDO ***,we discuss the current and future applications of pDOs to sarcoma,particularly in the field of liposarcoma.

关键词： Cell culture Liposarcoma patient-Derived Organoid(pDO) Spheroid Three-dimensional(3D)cell culture

Instantaneous frequency and wave mode identification in a magnetosheath using few spatial points

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese physics B 2013年第8期22卷 496-501页

作者： nathaniel e U Beloff n George n J Department of physics Akwa Ibom State UniversityNigeria University of Sussex Brighton UK

Observational data such as those obtained from the magnetosheath in the downstream of earth＇s bow shock have waveforms that differ from those of sinusoidal signals. In practice, they are not even aggregates of sinusoidal signals. Therefore, the frequency decomposition for the data requires technique that will account for the time-varying features of the data that will lead to deduction of physical meaning of the observations. The combination of empirical mode decompo- sition （eMD） and Hilbert transform has been used for extracting the various contributing oscillatory modes （eMDs） and the instantaneous frequency determination （Hilbert transform） of every physically meaningful mode called intrinsic mode func- tion （IMF）. The resulting instantaneous frequencies are used to determine instantaneous wave vectors. The combination of the instantaneous frequencies and wave vectors is useful in the identification of wave modes based on the characteristics of the waves. The results show that eMD-Hilbert can be more reliable than simple Hilbert transform alone.

关键词： eMD-Hilbert transform instantaneous frequency and wave vector

Merging bound states in the continuum in an open acoustic resonator

在线全文

学校读者我要写书评

暂无评论

Science China(physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 124-131页

作者： Lujun Huang Bin Jia Artem S.pilipchuk Sibo Huang Chen Shen Almas F.Sadreev Yong Li Andrey e.Miroshnichenko School of physics and electronic Sciences East China Normal University Institute of Acoustics Tongji University L.V.Kirensky Institute of physics Department of Mechanical engineering Rowan University School of engineering and Technology University of New South Wales at Canberra

Bound states in the continuum （BICs） are perfectly localized resonances despite embedding in the continuum ***,an isolated BIC is very sensitive to the structure ***,we report merging acoustic BICs in a single open resonator,robust against the structure *** find that both symmetry-protected BIC and Friedrich-Wintgen BIC are sustained in a single coupled waveguide-resonator *** varying the height and length of the resonator,these two BICs move toward each other and merge into a single one at a critical *** to an individual BIC,the merged BIC is robust against fabrication error because its Q-factor is proportional to ΔL-4,whereΔL embodies the structure *** essence of this extraordinary phenomenon is perfectly explained by the two-and three-level approximations of the effective nonHermitian ***,we present direct experimental demonstrations of the moving and merging of BICs in a coupled 3D waveguide-resonator,which are evidenced by the vanishing of the linewidth of Fano resonance in the transmission *** results may find exciting applications in designing high-quality acoustic sources,sensors and filters.

关键词： acoustic resonances bound state in the continuum high-Q resonances