检索结果-南通市图书馆

橇装式液化天然气加气站泄放气体处理及其加热器计算

在线全文

学校读者我要写书评

暂无评论

石油化工设备 2017年第4期46卷 53-57页

作者：雒淑娟孙俊胜刘福录任永平张鹏门建斌张兵上海蓝滨石化设备有限责任公司上海201518 甘肃蓝科石化高新装备股份有限公司甘肃兰州730070

液化天然气在储存和运输过程中会产生一定量的泄放气体。对橇装式液化天然气加气站泄放气体的两种处理方法进行了简单介绍。通过比较后得知,泄放气体经过斯特林制冷机再液化后可实现二次利用,也能体现节能减排的要求,同时从不同工况下... 详细信息

液化天然气在储存和运输过程中会产生一定量的泄放气体。对橇装式液化天然气加气站泄放气体的两种处理方法进行了简单介绍。通过比较后得知,泄放气体经过斯特林制冷机再液化后可实现二次利用,也能体现节能减排的要求,同时从不同工况下最大安全泄放量,加热器换热面积和长度,星型翅片管排列方式等方面对泄放气体加热器的设计进行了介绍。

关键词：加热器液化天然气泄放气体安全泄放量

Effect of Adding Nitrogen on Microstructure and Property of Vanadium Microalloyed Reinforcing Bar Steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2003年第2期10卷 45-50页

作者： LIU Shu-ping YANG Cai-fu ZHANG yong-quan Central Iron and Steel Research Institute

The relation between stacking fault overlap and martensitic nucleation in Fe-17Mn-10Cr-5Si-4Ni alloy was studied. The arrayed structure of dislocations and characteristics of ε-martensite formation under stress were in-situ observed by TEM. The results reveal that ε-martensite nucleates at the top of stacking faults overlapped band, where the ordered arrayed structure of Shockley partial dislocations exists. External stress promotes ε-martensitic nucleation ability because of accelerated ordering of Shockley partial dislocations in stacking faults overlapped band.

关键词： stacking fault overlap nucleation location stress-induced ε-martensite

NUMERICAL PREDICTION OF PROPELLER EXCITED ACOUSTIC RESPONSE OF SUBMARINE STRUCTURE BASED ON CFD,FEM AND BEM

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2012年第2期24卷 207-216页

作者： WEI Ying-san WANG yong-sheng CHANG Shu-ping fu Jian Department of Mechanical Engineering Naval University of EngineeringWuhan 430033China

A mesh-less Refined Integral Algorithm （RIA） of Boundary Element Method （BEM） is proposed to accurately solve the Helmholtz Integral Equation （HIE）.The convergence behavior and the practicability of the method are *** Fluid Dynamics （CFD）,Finite Element Method （FEM） and RIA are used to predict the propeller excited underwater noise of the submarine hull *** the propeller and submarine＇s flows are independently validated,then the self propulsion of the ＂submarine＋propeller＂ system is simulated via CFD and the balanced point of the system is determined as well as the self propulsion ***,the transient response of the ＂submarine＋ propeller＂ system is analyzed at the balanced point,and the propeller thrust and torque excitations are *** the thrust and the torque excitations of the propeller are loaded on the submarine,respectively,to calculate the acoustic response,and the sound power and the main peak frequencies are *** show that：（1） the thrust mainly excites the submarine axial mode and the high frequency area appears at the two conical-type ends,while the torque mainly excites the circumferential mode and the high frequency area appears at the broadside of the cylindrical section,but with rather smaller sound power and radiation efficiency than the former,（2） the main sound source appears at BPF and 2BPF and comes from the harmonic propeller ***,the main attention should be paid on the thrust excitation control for the sound reduction of the propeller excited submarine structure.

关键词： submarine propeller excitation self propulsion underwater noise Computational Fluid Dynamics (CFD) Finite Element Method (FEM) and Refined Integral Algorithm (RIA)

Hardware-in-loop adaptive neural control for a tiltable V-tail morphing aircraft

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2023年第4期22卷 197-211页

作者： fu-xiang Qiao Jing-ping Shi Xiao-bo Qu yong-xi Lyu School of Automation Northwestern Polytechnical UniversityXi'an710129China Shaanxi Province Key Laboratory of Flight Control and Simulation Technology Xi'an710129China

This paper proposes an adaptive neural control(ANC)method for the coupled nonlinear model of a novel type of embedded surface morphing aircraft which has a tiltable V-tail.A nonlinear model with sixdegrees-of-freedom is *** first-order sliding mode differentiator(FSMD)is applied to the control scheme to avoid the problem of“differential explosion”.Radial basis function neural networks are introduced to estimate the uncertainty and external disturbance of the model,and an ANC controller is proposed based on this design *** stability of the proposed ANC controller is proved using Lyapunov theory,and the tracking error of the closed-loop system is semi-globally uniformly *** effectiveness and robustness of the proposed method are verified by numerical simulations and hardware-in-the-loop(HIL)simulations.

关键词： Morphing aircraft Back-stepping control Adaptive control Neural networks Radial basis function

Dynamic evolution of Co species and morphological reconstruction on Co-N-C during the nitrate reduction reaction in neutral solution

在线全文

学校读者我要写书评

暂无评论

Nano Research 2025年第1期18卷 164-172页

作者： Yuanlin fu Xiaoting Yang Ya Yu Kang Zhou Xiaoyang Ye Aoxiang Zhang Xiaojiao Hou Bingbing Chen fuqiang Fan Yuhang Li Yu fu Department of Chemistry College of SciencesNortheastern UniversityShenyang 110819China Department of Physical Education Shen Yang Institute of Science and TechnologyShenyang 110167China Sungrow Power Supply Co. Ltd.Hefei 230088China

The electrochemical nitrate reduction reaction(eNO_(3)^(-)RR)is considered an effective approach for converting nitrate-containing wastewater to *** adsorption and activation of NO_(3)^(-)is the critical step for many materials and the high energy barrier inhibits the continuation of the reduction *** Co nanoparticles encapsulated in the carbon layer we prepared spontaneously react with NO_(3)^(-)and the resulting Co^(2+)is then reduced by electroreduction to Co^(0),which circulates *** resulted in overcoming the energy input required for NO_(3)^(-)adsorption and conversion,thereby increasing the catalytic *** the same time,the morphology of the catalyst reconstructed from a dodecahedron to an interwoven nanosheet structure and the increased surface area also gives it better *** obtained Co(OH)_(2)@Co-N-C has an excellent eNO_(3)^(-)RR of 2774.7μg·h^(-1)·cm^(-2)with a Faraday efficiency of 81.4%in neutral *** the same time,the material-modified electrode can run stably for more than 100 *** work provides a new idea for the design of Co-based catalysts for eNO_(3)^(-)RR.

关键词： electrochemical nitrate reduction reaction Co-based catalyst dynamic evolution of Co species morphological reconstruction

猪传染性胃肠炎病毒S基因植物表达载体的构建

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

吉林农业大学学报 2010年第6期32卷 670-674页

作者：王龙涛葛晨霞高雯雯付永平王丕武胡桂学吉林农业大学动物科学技术学院长春130118 吉林农业大学生物技术中心长春130118

应用RT-PCR技术克隆了猪传染性胃肠炎病毒TGEV-JL株S基因全序列,将其连接到pMD18-T载体。经SacⅠ和BamHⅠ酶切鉴定,其产物全长4320bp。测序后与TH-98等8个TGEV毒株的S基因序列进行比对,同源性为97.6%～99.8%。将该基因插入植物表达载体p... 详细信息

应用RT-PCR技术克隆了猪传染性胃肠炎病毒TGEV-JL株S基因全序列,将其连接到pMD18-T载体。经SacⅠ和BamHⅠ酶切鉴定,其产物全长4320bp。测序后与TH-98等8个TGEV毒株的S基因序列进行比对,同源性为97.6%～99.8%。将该基因插入植物表达载体pBI121的CaMV35S启动子下游,构建高效植物表达载体,转入根癌农杆菌EHA101中。结果表明:成功构建了重组植物表达载体pBI121-S,获得农杆菌工程菌。

关键词：猪传染性胃肠炎病毒 S基因植物表达载体

在线全文

学校读者我要写书评

暂无评论

高能重离子碰撞中的色玻璃凝聚态产生

普洱学院学报 2015年第3期31卷 19-21页

作者：杨海涛赵仲霞傅永平余功明昭通学院物理与电子信息工程学院昭通学院化学与生命科学学院云南昭通657000 临沧师范高等专科学校云南临沧677000 云南大学物理科学技术学院昆明650091

在高能重离子碰撞中,当碰撞能量很高或者Bjorken变量的值很小时,强子波函数中单位转移区域的胶子密度将会变得很大而导致胶子分布出现饱和,即色玻璃凝聚态(colour glass condensate,CGC)。据此,简要综述了高能重离子碰撞中色玻璃凝聚态(... 详细信息

在高能重离子碰撞中,当碰撞能量很高或者Bjorken变量的值很小时,强子波函数中单位转移区域的胶子密度将会变得很大而导致胶子分布出现饱和,即色玻璃凝聚态(colour glass condensate,CGC)。据此,简要综述了高能重离子碰撞中色玻璃凝聚态(colour glass condensate,CGC)的产生及其性质。

关键词：胶子饱和色玻璃凝聚态高能重离子碰撞

猪传染性胃肠炎病毒S基因转基因玉米植株的构建及鉴定

在线全文

学校读者我要写书评

暂无评论

中国预防兽医学报 2010年第10期32卷 752-756页

作者：王龙涛葛晨霞高雯雯付永平徐凤宇王丕武胡桂学吉林农业大学动物科学技术学院吉林长春130118 吉林农业大学生物技术中心吉林长春130118

为构建猪传染性胃肠炎病毒(TGEV)S基因转玉米植株,本研究以玉米自交系"丹598"和"H99"的胚性愈伤组织为材料,通过愈伤组织对卡那霉素的敏感性试验,确定了卡那霉素40mg/L～56mg/L为愈伤组织适宜选择压。利用农杆菌介导法将TGEV S基因导入... 详细信息

为构建猪传染性胃肠炎病毒(TGEV)S基因转玉米植株,本研究以玉米自交系"丹598"和"H99"的胚性愈伤组织为材料,通过愈伤组织对卡那霉素的敏感性试验,确定了卡那霉素40mg/L～56mg/L为愈伤组织适宜选择压。利用农杆菌介导法将TGEV S基因导入玉米自交系中,并对农杆菌转化系统的条件进行了优化。结果表明,根癌农杆菌EHA105的菌液OD600nm值为0.5～0.6时,侵染20min为农杆菌转化的最适条件。并对转化的愈伤组织进行分化诱导出苗后进行PCR和Southern blot检测,证明外源目的基因已整合到玉米基因组中。

关键词：猪传染性胃肠炎病毒 S基因玉米农杆菌

在线全文

学校读者我要写书评

暂无评论

黑木耳部分种质资源SSR分子身份证的构建

农业生物技术学报 2017年第12期25卷 1930-1939页

作者：徐安然付永平王延锋张志武纪策王菲叶健强李玉宋冰吉林农业大学食药用菌教育部工程研究中心华盛顿州立大学作物和土壤科学系黑龙江省农业科学院牡丹江分院

黑木耳(Auricularia heimuer)是我国各地广泛栽培的重要食用型菌类,在形态发育和遗传育种方面均备受关注,但黑木耳存在同物异名现象,这给育种工作带来了诸多不便。分子身份证是作物品种数字化的DNA指纹,在食用菌种质资源的鉴定和保护方... 详细信息

黑木耳(Auricularia heimuer)是我国各地广泛栽培的重要食用型菌类,在形态发育和遗传育种方面均备受关注,但黑木耳存在同物异名现象,这给育种工作带来了诸多不便。分子身份证是作物品种数字化的DNA指纹,在食用菌种质资源的鉴定和保护方面具有重要作用。本研究利用SSR标记对来源于全国不同区域的72份黑木耳栽培种和野生种菌株进行了遗传多样性分析及分子身份证的构建,从65对SSR引物中筛选出8对核心引物对收集来的种质资源进行了分析,利用非加权组平均法(unweighted pairgroup method with arithmetic means,UPGMA)对扩增结果进行了聚类分析,结果表明,供试菌株遗传相似性系数在0.37~1.00之间,在相似性0.62处可将供试菌株分为3大类群,Au1~Au11属于黑山系列,亲缘关系较近,可能存在同物异名的现象;Au44和Au90、Au40和Au73、Au22和Au60属于同物异名现象。根据不同代表菌株对SSR引物产生的不同扩增谱型,构建出了这72份不同的黑木耳菌株的分子身份证。本研究结果为食用菌种质资源鉴定和保护提供了依据。

关键词：黑木耳分子身份证 SSR分子标记