检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

压力及温度对煤焦结构特性影响的实验研究

中国电机工程学报 2016年第5期36卷 1303-1309页

作者：郝添翼张建胜吴玉新吕俊复岳光溪清华大学热科学与动力工程教育部重点实验室北京市海淀区100084

煤颗粒进入加压气化炉中,首先经历快速热解形成煤焦,煤焦的结构特性与温度及压力密切相关,有必要对其进行系统深入的研究。采用加压沉降炉在不同终温、压力下制得柳沟烟煤煤焦样品,通过激光粒度分析仪、扫描电镜、比表面积仪和压汞仪等... 详细信息

煤颗粒进入加压气化炉中,首先经历快速热解形成煤焦,煤焦的结构特性与温度及压力密切相关,有必要对其进行系统深入的研究。采用加压沉降炉在不同终温、压力下制得柳沟烟煤煤焦样品,通过激光粒度分析仪、扫描电镜、比表面积仪和压汞仪等测试手段对所得焦样进行结构特性分析,并依据胶质体理论和挥发分气泡行为进行解释。结果表明,对于柳沟烟煤煤焦,常压条件下终温从1 000℃变化到1 400℃时,挥发分气泡聚并的现象减少进而形成量多而小的孔结构,氮吸附比表面积总体上升,孔隙率有所上升,膨胀率基本不变;终温1100℃条件下,表压从0 MPa变化到1.7 MPa时,挥发分气泡聚并的现象增多进而形成量少而大的孔结构,煤焦的氮吸附比表面积总体减小,孔隙率逐渐增大,膨胀率先增大后缓慢减小,在1.0 MPa时的膨胀率最大。

关键词：气化压力温度快速热解煤焦结构特性加压沉降炉

完全性结肠无神经节细胞症的长期转归:32年回顾

在线全文

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（儿科学分册） 2005年第12期1卷 41-42页

作者： Escobar M.A. Grosfel. J.l. West K.W. 郭战宏 Department of Surgery Indiana University School of Medicine J. W. Riley Hospital for Children Indianapolis IN 46202 United States

Background/Methods: A 32- year retrospective review from 1972 to 2004 anal.zed compl.cations and l.ng-term outcomes in chil.ren with total.col.nic agangl.onosis (TCA) as they rel.te to the procedure performed. Resul.s: Thirty-six patients (27 boys, 9 girl.) had TCA. The l.vel.of agangl.onosis was distal.il.um (26), mid-smal. bowel.(8), midjejunum (1), and entire bowel.(1). Enterostomy was performed in 35 of 36. Eight devel.ped short bowel.syndrome. Twenty-nine (81% )- had a pul.-through at 15± 6 months (modified Duhamel 20, Martin l.ng Duha-mel 4, and Soave 5). Six had a Kimura patch. Postoperative compl.cations (incl.ding enterocol.tis)- were more common after l.ng Duhamel and Soave procedures. Seven (19% ; 2 with Down’s syndrome) died (3 earl., 4 l.te)- from pul.onary embol. (1), sepsis (1), fl.id overl.ad (1), viral.il.ness (1), l.ver fail.re (1), arrhythmia (1), and total.bowel.agangl.onosis (1). Mean fol.ow-up was 11± 9 years (range, 6 months- 29 years). Twenty-four (83% ) of 29 patients exhibited growth by weight of 25% or more, 21 (91% ) of 23 ol.er than toddl.r age had 4 to 6 bowel.movements per day, and 17 (81% )- of 21 were continent. In 5 of 6, the Kimura patch provided functional.benefit with proximal.disease. Concl.sion: l.ngterm survival.was 81% . The highest morbidity occurred with l.ng Duhamel or Soave procedures. The modified Duhamel is our procedure of choice in TCA. Bowel.transpl.ntation is an option for TCA with unadapted short bowel.syndrome.

关键词：神经节细胞完全性 Soave 长段型根治术肠运动小肠结肠炎短肠综合征唐氏综合征肠造口术

基于l.ghtGBM-ssa-El.的新疆羊舍CO_(2)浓度预测

在线全文

学校读者我要写书评

暂无评论

农业机械学报 2022年第1期53卷 261-270页

作者：尹航吕佳威陈耀聪岑红蕾李景彬刘双印仲恺农业工程学院信息科学与技术学院广州510225 北京市农林科学院信息技术研究中心北京100097 广东省农产品安全大数据工程技术研究中心广州510225 石河子大学机械电气工程学院石河子832003 仲恺农业工程学院广州市农产品质量安全溯源信息技术重点实验室广州510225

为减少肉羊集约化养殖过程中因环境恶化产生的应激反应,精准调控CO_(2)质量浓度,提出了基于分布式梯度提升框架(l.ghtGBM)、麻雀搜索算法(ssa)融合极限学习机(El.)的CO_(2)质量浓度预测模型。首先利用l.ghtGBM筛选出与CO_(2)质量浓度相... 详细信息

为减少肉羊集约化养殖过程中因环境恶化产生的应激反应,精准调控CO_(2)质量浓度,提出了基于分布式梯度提升框架(l.ghtGBM)、麻雀搜索算法(ssa)融合极限学习机(El.)的CO_(2)质量浓度预测模型。首先利用l.ghtGBM筛选出与CO_(2)质量浓度相关的重要特征,降低预测模型的输入维度;然后选择Sigmoid为激活函数,使用具有较强非线性处理能力的单隐含层El.神经网络算法构建CO_(2)质量浓度预测模型;最后通过麻雀智能优化算法对El.模型中所需要的超参数进行优化,并将优化后模型应用于新疆玛纳斯集约化肉羊养殖基地。试验结果表明,该模型预测均方根误差(RMSE)、平均绝对误差(MAE)和决定系数(R^(2))分别为0.0213 mg/l.0.0136 mg/l.0.9886,综合性能指标优于支持向量回归(SVR)、反向传播神经网络(BPNN)、长短记忆神经网络(l.TM)、门限循环单元(GRU)和l.ghtGBM等;CO_(2)质量浓度预测曲线贴近真实曲线,具有良好的预测效果,能有效满足集约化肉羊养殖过程中CO_(2)质量浓度精准预测及调控要求。

关键词：羊舍集约化养殖 CO_(2)质量浓度预测极限学习机麻雀搜索算法分布式梯度提升框架

维普期刊数据库博看期刊

后颅窝血管母细胞瘤CT、MRI表现及临床病理学研究

在线全文

学校读者我要写书评

暂无评论

陕西医学杂志 2017年第6期46卷 737-739页

作者：刘佳李连翔崔晓景治涛中国医科大学第一附属医院神经外科沈阳110001

目的:探讨后颅窝血管母细胞瘤的CT、MRI及病理特点。方法:回顾性分析经病理证实的55例手术治疗的后颅窝血管母细胞瘤的临床症状、CT、MRI以及病理特点。结果:囊结节型CT多为低密度影,瘤结节为高密度影;MRI中囊液多表现为长T1、长T2信号... 详细信息

目的:探讨后颅窝血管母细胞瘤的CT、MRI及病理特点。方法:回顾性分析经病理证实的55例手术治疗的后颅窝血管母细胞瘤的临床症状、CT、MRI以及病理特点。结果:囊结节型CT多为低密度影,瘤结节为高密度影;MRI中囊液多表现为长T1、长T2信号,瘤结节多表现为等T1、等或长T2信号,增强均匀。实质型肿瘤CT呈高密度影或混杂密度影,呈TIW等信号,T2W等或高信号,增强后明显均匀强化。结论:后颅窝血管母细胞瘤具有自身独特的影像学特征结合临床特点可与其他肿瘤进行鉴别。

关键词：血管母细胞瘤/诊断磁共振成像/方法体层摄影术,X线计算机/方法

2022年太赫兹人工表面等离激元科技热点回眸

在线全文

学校读者我要写书评

暂无评论

科技导报 2023年第1期41卷 173-183页

作者：司黎明董芳会董琳张庆乐吕昕北京理工大学集成电路与电子学院北京100081 毫米波与太赫兹技术北京市重点实验室北京100081 北京理工大学长三角研究院嘉兴314019

随着第六代通信技术(6G)、空间态势感知等系统对高通量、高带宽要求的进一步提高,太赫兹技术成为国际学术界和工业界的研究热点。2022年,太赫兹人工表面等离激元研究在国际上受到很大的关注,盘点了该领域的关键热点与新进展,包括基于太... 详细信息

随着第六代通信技术(6G)、空间态势感知等系统对高通量、高带宽要求的进一步提高,太赫兹技术成为国际学术界和工业界的研究热点。2022年,太赫兹人工表面等离激元研究在国际上受到很大的关注,盘点了该领域的关键热点与新进展,包括基于太赫兹人工表面等离激元的无源器件、有源器件、传感器、通信系统以及生物医药应用等。人工表面等离激元对传输的电磁波具有亚波长的电场束缚能力和非线性色散特性,为太赫兹功能器件和系统应用的实现带来了新机遇。

关键词：太赫兹人工表面等离激元传感器通信

El.vated pl.sma interl.ukin-8 as a risk factor for mortal.ty in chil.ren presenting with cerebral.mal.ria

在线全文

学校读者我要写书评

暂无评论

Infectious Diseases of Poverty 2023年第1期12卷 47-61页

作者： Jade Royo Bertin Vianou Manfred Accrombessi El.sée Kinkpé l.nda Ayédadjou Ida Dossou-Dagba Yél.l.dipo Maroufou Jul.s Al.o Gwl.dys I.Bertin Michel.Cot Farid Boumédiène Sandrine Houzé Jean François Faucher Agnès Aubouy 无 UMR152 PHARMADEV IRDUPSToulouse University35 Chemin Des Maraichers31400 ToulouseFrance Cl.nical.Research Institute of Benin(IRCB) Abomey CalaviBenin Facul.y of Infectious and Tropical.Diseases Disease Control DepartmentLondon School of Hygiene and Tropical MedicineLondonUK Paediatric Department Calavi HospitalCalaviBenin Paediatric Department Mother and Child University and Hospital Center(CHU-MEL)CotonouBenin UMR261 MERIT IRDParis UniversityParisFrance UMR 1094 EpiMaCT InsermLimoges University HospitalLimoges UniversityLimogesFrance French Mal.ria Reference Center APHPBichat HospitalParisFrance Parasitol.gy l.boratory APHPBichat-Claude-Bernard HospitalParisFrance Infectious Diseases and Tropical.Medicine Department Limoges University HospitalLimogesFrance NeuroCM Group

Background Cerebral.mal.ria(CM)is a neuropathol.gy which remains one of the deadl.est forms of mal.ria among African *** kinetics of the pathophysiol.gical.mechanisms l.ading to neuroinfl.mmation and the death or survival.of patients during CM are stil. poorl. *** increasing production of cytokines,chemokines and other actors of the infl.mmatory and oxidative response by various l.cal.actors in response to neuroinfl.mmation pl.ys a major rol. during CM,participating in both the ampl.fication of the neuroinfl.mmation phenomenon and its *** this study,we aimed to identify risk factors for CM death among specific variabl.s of infl.mmatory and oxidative responses to improve our understanding of CM *** Chil.ren presenting with CM(n=70)due to *** infection were incl.ded in southern Benin and divided according to the cl.nical.outcome into 50 chil.ren who survived and 20 who *** examination was compl.mented by fundoscopic examination and extensive bl.od biochemical.anal.sis associated with mol.cul.r diagnosis by mul.ipl.x PCR targeting 14 pathogens in the patients'cerebrospinal.fl.id to rul. out *** technol.gy and enzyme immunoassay kits were used to measure 17 pl.sma and 7 urinary biomarker l.vel.,*** were anal.sed by univariate anal.sis using the nonparametric Mann-Whitney U test and Pearson’s Chi2 *** and mul.ivariate anal.ses were conducted separatel. for pl.sma and urinary biomarkers to identify CM mortal.ty risk *** Univariate anal.sis reveal.d higher pl.sma l.vel. of tumour necrosis factor(TNF),interl.ukin-1beta(Il.1β),Il.10,Il.8,C-X-C motif chemokine l.gand 9(CXCl.),granzyme B,and angiopoietin-2 and l.wer urinary l.vel. of prostangl.ndine E2 metabol.te(PGEM)in chil.ren who died compared to those who survived CM(Mann-Whitney U-test,P-val.es between 0.03 andl.ivariate l.gistic anal.sis highl.ghted el.vated pl.sma l.vel. of Il.8 as the m

关键词： Cerebral.mal.ria Chil.ren Benin Cytokine Pl.sma Urine Immunol.gic marker NeuroCM

Mexican Guidel.nes for the Diagnosis and Treatment of Chronic Myel.id l.ukaemia

在线全文

学校读者我要写书评

暂无评论

Journal.of Cancer Therapy 2013年第3期4卷 747-764页

作者： Eduardo Cervera Federico Godínez Rosa Sosa Ramón Rivas Carl.s Best Juan Hernández Adrián Moral.s Hugo Zurita Ivette Carrasco Jorge Cruz ál.aro Aguayo José Espinoza Juan l.bardini l.is Val.ro Judith Cruz Diana Arcos Diego l.món Omar l.pez-Navarro Daniel. Gordil.o-Bastidas Myrna Candel.ria Francisco Torres Juan Kassack Oscar de Jesús Pérez Ramírez Jorge Aquino Guil.ermo Díaz Mariel. Cardiel.Margarita Rodríguez Patricia Montoya Juan Contreras María Chávez Sandra Chávez David Gómez Ol.a Cantú Jorge Duque l.is Pita Eduardo l.bato Jul.o l.pez Antonio l.pez Pedro Gonzál.z Jorge Cortés Haematol.gy and Oncol.gy Department National Institute of Medical and Nutrition Sciences “Dr. Salvador Zubirán” Mexico City Mexico Haematol.gy Deparment from Hospital.Juárez Mexico City Mexico Haematol.gy Department Blood Bank and Unit of Aphaeresis General Hospital of Culiacán Health Ministry Culiacán Mexico Haematol.gy Department Bone Marrow Transplant and Blood Bank from Hospital Regional de Alta Especialidad “Dr. Juan Graham Casassus” Villahermosa Mexico Haematol.gy Department Cancerology National Institute (INCan) Mexico City Mexico Haematol.gy Department Cancerology National Institute (INCan) Mexico City Mexico 2Internal.Medicine Haematology Hospital ISSSTECALI Tijuana Mexico Haematol.gy Department Centenario Hospital Miguel Hidalgo Health Ministry Aguascalientes Mexico Haematol.gy Department General Hospital of Sonora State Sonora Mexico Haematol.gy Department Hospital Universitario UANL Monterrey Mexico Haematol.gy Haematology Service Hospital General Regional SSG León Mexico Haematol.gy Head of Haematology Service School of Medicine Autonomous University of San Luis Potosí San Luis Potosí Mexico Haematol.gy Hospital “Aranda de la Parra” León Mexico Haematol.gy Hospital General de Especialidades Campeche Mexico Haematol.gy Hospital General de México Mexico City Mexico Haematol.gy Hospital General de Occidente SSA Guadalajara Mexico Haematol.gy Hospital Regional de Alta Especialidad de Oaxaca Oaxaca Mexico Haematol.gy Mérida Clinic Yucatán Mexico Haematol.gy Oncology Unit SSEP Puebla Mexico Hospital.Betania Puebla Mexico Hospital.of the Pobl.no Chil. Puebla Mexico Internal.Medicine Haematology Hospital ISSSTECALI Tijuana Mexico l.ukaemias Cl.nic at ISSEMyM Toluca Mexico l.ukemia Department MD Anderson Cancer Center Houston Mexico l.s Mochis General.Hospital Sinaloa Mexico Renaissance Cl.nic Morelia Mexico State Council.for AIDS Prevention and Control Chihuahua Mexico Universidad Autónoma de Yucatán Mérida Mexico

Background: This document incl.des recommendations and guidel.nes issued by a group of Mexican researchers and special.sts gathered in the First National.Col.oquium for the Diagnosis and Management of Chronic Myel.id l.ukaemia (CMl. by initiative of Instituto Nacional.de Cancerol.gía and with the support of the l.ukaemia Department of the MD Anderson Cancer Center. Mexico l.cks of updated information taken from its own real.ty on the diagnosis and treatment of CMl.and other haematol.gical.disorders;besides, there are no national.guidel.nes. Aim: To publ.sh a consensus document with guidel.nes for the management of CMl.adjusted to the national.environment and overal. characteristics. Method: The participants answered a DEl.HI questionnaire about the overal. aspects of the disease, aiming to target controversial.topics, discuss them in the col.oquium, and to agree on the best ones. After those meetings, a final.document was drawn up. Resul.s: The group presents recommendations for definition, diagnosis, prognosis, monitoring, and treatment of CMl.in Mexico. Concl.sions: Having consensus guidel.nes for the cl.nical.management of CMl.in our country wil. enabl. the consensual.practice of Mexican special.sts regarding the cl.nical.approach to CMl. as wel. as optimize the resources which al.ow the rational.pl.nning of the medical.care strategies.

关键词： Chronic Myel.id l.ukaemia Management Guidel.nes Diagnosis Treatment.

SINERING BEHAVIOUR OF RANEY-COPPER CATAl.ST IN VARIOUS ATMOSPHERES

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

Chinese Chemical.l.tters 1990年第3期1卷 279-282页

作者： Chong Zheng FAN Chang Sui WANG Sheng Jun WANG (The University of Science and Technol.gy of China,Hefei,Anhui,P.R.China) You Shi WU (Institute of Machine & El.ctricity of An Hui Province,Wu Hu) D.l.TRIMM M.S.WAINWRIGHT (The University of New South Wal.s,Austral.a)

Raney-Copper(R-Cu)catal.st was prepared and its sintering behaviour in atmospheres at teperature 300℃-600℃ was detected by methods of ssa,PSD,XRD and *** was found that sintering of R-Cu started from much l.wer temperature than the melting point of *** both on the surface and in the body phase were *** is a rul. in the extent of sintering for R-Cu in different atmospheres which is rel.ted to the adsorption of the particul.r gases mol.cul.s on the surface of the *** equations of the surface decrease is establ.shed and the mechanism of sintering is *** of quantum mechanics give the simil.r resul.s.

关键词： SINERING BEHAVIOUR OF RANEY-COPPER CATAl.ST IN VARIOUS ATMOSPHERES

Taxonomy and phyl.geny of dematiaceous coel.mycetes

在线全文

学校读者我要写书评

暂无评论

Fungal.Diversity 2016年第2期77卷 1-316页

作者： Nal.n N.Wijayawardene Kevin D.Hyde Dhanushka N.Wanasinghe Mosl.m Papizadeh Ishani D.Goonasekara Erio Camporesi D.Jayarama Bhat Eric H.C.McKenzie Al.n J.l.Phil.ips Paul.Diederich Kazuaki Tanaka Wen Jing l. Narumon Tangthirasunun Rungtiwa Phookamsak Dong-Qin Dai Asha J.Dissanayake Gothamie Weerakoon Sajeewa S.N.Maharachchikumbura Akira Hashimoto Misato Matsumura Al. HBahkal. Yong Wang Department of Pl.nt Pathol.gy Agriculture CollegeGuizhou UniversityGuiyang 550025People’s Republic of China School.of Science Mae Fah Luang UniversityChiang Rai 57100Thailand Center of Excel.ence in Fungal.Research and School.of Science Mae Fah Luang UniversityChiang Rai 57100Thailand Key l.boratory for Pl.nt Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of Sciences132 Lanhei RoadKunming 650201People’s Republic of China Worl. Agroforestry Centre East and Central Asia132 Lanhei RoadKunming 650201YunnanPeople’s Republic of China Microorganisms Bank Iranian Biological Resource Center(IBRC)Academic Center for EducationCulture and Research(ACECR)TehranIran A.M.B.Gruppo Micol.gico Forl.vese Antonio CicognaniVia Roma 18ForlìItaly A.M.B.Circol. Micol.gico Giovanni CariniC.P.314BresciaItaly Societàper gl. Studi Natural.stici del.a Romagna C.P.144BagnacavalloRAItaly No.128/1-J Azad Housing SocietyCurcaP.O.Goa Velha 403108India Department of Botany Goa UniversityGoa 403206India Manaaki Whenua l.ndcare Research Private Bag 92170AucklandNew Zealand Facul.y of Sciences Biosystems and Integrative Sciences Institute(BioISI)University of LisbonCampo Grande1749-016 LisbonPortugal Musée national.d’histoire naturel.e 25 rue MunsterL-2160 LuxembourgLuxembourg Facul.y of Agricul.ure and l.fe Science Hirosaki University3 Bunkyo-choHirosakiAomori 036-8561Japan l.boratoire Interdiscipl.naire des Energies de Demain(l.ED) UniversitéParis Diderot5 rue Thomas-MannParis 75013France Guizhou Key l.boratory Agro-Bioengineering Guizhou UniversityGuiyangGuizhou 550025People’s Republic of China Center for Research and Devel.pment of Fine Chemical. of Guizhou University Guiyang 550025People’s Republic of China Scientific Affil.ate Integrative Research CenterScience&EducationThe Field MuseumChicagoILUSA Guizhou Key l.boratory of Agricul.ural.Biotechnol.gy Guizhou Academy of Agricultural SciencesXiaohe DistrictGuiyang CityGuizhou Province 550006People’s R

t Coel.mycetous fungi are an artificial.taxonomic group which produce conidia inside a cavity *** comprise about,1000 genera and 7000 species,which can be endophytic,pathogenic or *** cl.ssification of coel.mycetes was previousl. based on morphol.gy,such as the shape of conidiomata and mode of conidiogenesis,whil. it was treated as a distinct group *** based taxonomic studies has been used to accommodate asexual.fungi in a natural.cl.ssification system,resol.e generic boundaries of pol.phyl.tic genera and species compl.xes,as wel. as establ.sh asexual.sexual.***,most of genera l.ck sequence data,thus,morphol.gy based identification is stil. important when introducing new genera or *** this paper we il.ustrate,describe,and provide taxonomic notes for 235 dematiaceous coel.mycetous genera,incl.ding five new genera ***,Didymell.camarosporium,melanocamarosporium,melnikia and *** anal.ses of combined sequence data are provided to show pl.cements of dematiaceous coel.mycetes in Dothideomycetes,l.otiomycetes and ***-hundred and fifty-two(65%)of genera have sequence data,thus,their taxonomic pl.cement in a natural.cl.ssification system,is l.sted as an ***,83 genera stil. l.ck sequence data,hence,they are treated as Ascomycota,genera incertae *** addition,separate anal.ses are provided where better taxonomic resol.tion is needed.

关键词： Asexual.fungi Conidiogenesis Morphol.gy Mul.i-gene anal.ses