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   marine 在 船舶工业 分类中 的翻译结果: 查询用时:0.201秒
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marine     
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  船舶
    Research on Marine Diesel Engine Fault Diagnosis Method Based on Information Fusion Technology and Application
    基于信息融合技术船舶柴油机故障诊断方法的研究与应用
短句来源
    A Study of Fuzzy Parameter Method Used for Low Speed Marine Diesel Engine Fault Diagnosis
    参数模糊法在船舶低速柴油机故障诊断中的应用研究
短句来源
    Study on Intelligent Monitoring and Intelligent Diagnosis of Marine Diesel Engine
    船舶柴油机智能监测与智能诊断的研究
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    Pneumatic Remote Control System for Marine Diesel Engines
    船舶柴油机主机的气动遥控系统
短句来源
    An Analysis on Torsional Fatigue Failures in Marine Diesel Installations of Our Country in Recent Years
    近年来我国船舶柴油机动力装置扭振故障分析
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  船用
    A Study on the Marine Strapdown Navigation System Based on FOG
    基于光纤陀螺船用捷联导航系统研究
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    AN INVESTIGATION INTO THE DESIGN OF HEAVY-LIQUID WATER GAUGE FOR MARINE BOILERS
    船用锅炉重液式水面计装置的设计方案探讨
短句来源
    The CDP type marine electronic loading computer
    CDP型船用电子配载仪
短句来源
    RESEARCH ON THE DYNAMIC PERFORMANCE OF MARINE DIESEL ENGINE 180 TYPE VALVE MECHANISM WITH CAM-SHAFT ON CYLINDER HEAD
    船用180柴油机顶置式凸轮轴配气机构动力性能的研究
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    An Analysis of Environment Test of Marine Radar
    船用导航雷达环境试验的分析和评述
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  海上
    Marine Traffic Management in Dalian Harbour
    大连港的海上交通管理
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    Marine Traffic System GPSS Simulation and Application
    海上交通系统GPSS模拟及应用
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    ON A MARINE TRAFFIC FLOW SIMULATOR
    海上船舶交通流模拟器
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    Micro-Macro Simulation Based on Network Model of Marine Traffic
    海上交通网络模型微-宏观模拟
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    The Application of Marine Traffic Simulation to Feasibility Demonstration of VTS Scheme of Dalian Harbour Sea Area
    海上交通模拟在大连港水域的VTS方案可行性论证中的应用
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  舰船
    DESIGN OF TILTING-PAD RADIAL BEARINGS FOR MARINE STEAM AND GAS TURBINES
    舰船蒸燃动力可倾瓦径向轴承的设计
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    The Finite Element Analysis of High-frequency Vibration Isolation for Marine Power Plants
    舰船动力装置高频振动隔离问题的有限元分析
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    Computer Aided Interactive Analysis System for Marine Structures
    舰船结构交互分析系统的研究
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    Marine Fiber-optic Liquid Level Detecting System
    舰船光纤液位检测系统
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    Automatic drawing system based on parameters for marine electrical equipments
    基于参数化的舰船电气自动绘图系统
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  marine
ROLE OF INTERMEDIARY BIOMARKERS IN DETERMINING THE ANTICANCER EFFICACY OF MARINE COMPOUNDS
      
In the present study, two of the probable an umor marine compounds, manzamine A and sarcophine, were screened using benzo[a]pyrene (BP)-derived DNA adduct formation in MCF-7 cells as intermediary biomarker.
      
The results show that low concentrations of NO were self-produced by marine algae during the exponential growth period and were about nmol/L level.
      
The NO threshold concentration exists according to the influence of exogenous NO on the marine phytoplankton growth.
      
Characterization of iodine species in the marine aerosol: To understand their roles in particle formation processes
      
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During the design, production and maintenance of high speed rotating machines, the balancing of its rotating parts now is generally considered as one of the most important problems urgently required to be settled. In the first part of this paper, the unbalanced effect and the fundamental principles of balancing are presented. Then, the graphical method of determining the allowable balancing accuracy of marine rotating machines is specially introduced. For the lack of other proper propositions, the graphical...

During the design, production and maintenance of high speed rotating machines, the balancing of its rotating parts now is generally considered as one of the most important problems urgently required to be settled. In the first part of this paper, the unbalanced effect and the fundamental principles of balancing are presented. Then, the graphical method of determining the allowable balancing accuracy of marine rotating machines is specially introduced. For the lack of other proper propositions, the graphical solution here mentioned is worthy to recommend for practical use. Finally, the fundamental principles of the conventional balancing machines are given and causes of grave error which may be produced during balancing process are analysed.

在设计、制造和使用高速旋转机械时,转子的平衡已成为普遍重视及迫切需要解决的问题之一。本文在叙述了旋转机械形成不平衡的原因及其平衡方法的基本原理后,着重介绍确定船用旋转机械许用平衡精度图线的方法。在没有充份资料的情况下,这些图线可推荐于实际应用。本文亦简要分析了旋转机械平衡机床的基本原理以及在平衡过程中可能导致较大误差的因素。

This paper discusses the possibility and reality of adopting flexible rotors in marine steam turbines. Firstly, it deals with the advantages of using flexible rotors in marine steam turbines. In order to reducing the specific weight of the turbine equipment and improving the manoeuvreability, it is advisable to consider the adoption of flexible rotors in modern high speed steam turbines. In this paper, it explains that with high speed turbines, it is difficult to obtain a really rigid rotor due to...

This paper discusses the possibility and reality of adopting flexible rotors in marine steam turbines. Firstly, it deals with the advantages of using flexible rotors in marine steam turbines. In order to reducing the specific weight of the turbine equipment and improving the manoeuvreability, it is advisable to consider the adoption of flexible rotors in modern high speed steam turbines. In this paper, it explains that with high speed turbines, it is difficult to obtain a really rigid rotor due to the influence of the support rigidity. Though the first critical speed is designed to be 20~30% above the working speed, the actual first critical speed often falls down to a value below the working speed. By calculation, it can be proved that with a well-balanced rotor, the deflection of the rotor due to vibration when operating at a speed near or equal to the first critical speed for a fairly long period is very small, and we can expect the rotor working in a satisfactory manner. The paper also discusses the problem of self-excited vibration of a supercritical rotor. It explains that whirling effect due to the instability of oil film is the main opposition of the reliability of flexible rotor, and the oil whirling only appears when the working speed is at a value of twice the first critical speed. Therefore we must keep the working speed lower than that value. The paper also lists the region of the. critical speeds of flexible rotors. In conclusion, the author expresses his own opinions with regarding to the adoption of flexible rotors in high speed marine steam turbines, and claims that it will be advantageous and possible.

本文主要讨论舰船汽轮机采用柔性转子的可能性及现实性问题。文章首先说明了舰船汽轮机采用柔性转子的好处,着重说明了由于近年来舰用汽轮机的转速提高及设计点后移,为了进一步减轻重量及提高操纵性和机动性就要求采用柔性转子。文章论证了对高速汽轮机来说,由于支承刚性的影响,实际上很难得到刚性转子。尽管计算临界转速大于工作转速(20~30)%,而实际的临界转速仍然有可能落入工作转速以内。文中通过计算,证明了即使在临界转速下长期运转,只要转子平衡得好,振动挠度是很小的,转子工作亦是可靠的。文章还对超临界转子的自激动问题进行了讨论,并指出由于油膜不稳定性而引起的自激振动严重地影响柔性转子的工作可靠性。这种自激振动只是在工作转速大于二倍临界转速时才发生,因此必需使工作转速小于二倍临界转速。文中大致地给出了采用柔性转子时选取临界转速的范围。文章最后对舰船汽轮机采用柔性转子的可能性问题提出了意见,认为舰船高速汽轮机采用柔性转子是可能的,并且有一系列的好处。

Due to the absence of common understanding among the naval architects,engine-builders and marine engineers,about the definition of marine diesel engine power rating,difficulties aroused by power deficiency in diesel-installations on board were frequently eneountered in service.This paper deals with diesel engine power rating from manufacturing and service point of view.The manufacturers should rate their engines into three ranks:maximum rating,nominal rating and over-nominal rating. The marine...

Due to the absence of common understanding among the naval architects,engine-builders and marine engineers,about the definition of marine diesel engine power rating,difficulties aroused by power deficiency in diesel-installations on board were frequently eneountered in service.This paper deals with diesel engine power rating from manufacturing and service point of view.The manufacturers should rate their engines into three ranks:maximum rating,nominal rating and over-nominal rating. The marine engineers should rate their auxiliary engines into two ranks,namely,normal service rating and overload rating,and their main propulsion engines into trial trip rating,maximum service rating and normal service rating.Scientific definifion of these ratings are explained and their empirical relati- ons are also given. The bases of nominal rating are standard ambiant atmospheric conditions and installation condi- tions.The author proposes that standard ambiant atmospheric conditions should be based on the mean conditions in the test shop of the most diesel engine factories throughout the country.However,the naval architects should rate their engines according to the particular conditions of the appointed navigation zone and the kind of service to be attained.Numerical data of ambiant atmospheric conditions and installation conditions proposed are:736mmHg.,20℃,70% humidity,and less than 150 mm WG vacuum in the intake air system,30~300mmHg back pressure in the exbaust system.The calculation method in practice for correcting nominal rating and specific fuel consumption according to the variations of ambiant atmospheric conditions differ largely one another.For non-supercharged diesel engines,new correction formulas according to constant fuel pump rack and constant fuel/air ratio respectively are recommended in the paper.The results of comparison of these proposed fornmlas with others in practice and also with published test data show that the recommended formulas are more reasonable,although the correction is still slighly too high. The ambiant conditions on board differ largely with those in test shop,so the determination of service rating depends upon the specification of ambiant atmospheric conditions in the machinery compartment.Three kinds of standard ambiant conditions in machinery compartment,for high sea,east- south sea and north sea-going ships respectively,are given in this paper.These numerical data are deter- mined by statistical method.In the determination of service rating,the influence of wear,rpm.,insta- bility and power reserve must be considered.Its empirical coefficients are introduced.Generally,the normal service rating for auxiliary engines is about 75~82% of the nominal rating from manufacturer and 70~99% for the main propulsion engines.

船用柴油机功率的定义在设计、制造和使用各方面缺少统一的理解,以致使用时常常出现柴油机功率满足不了需要的问题。本文提出船用柴油机功率分级应从制造及使用两方面分别加以考虑:从制造方面可分为最大功率、额定功率和超额功率三级;从船上使用方面,驱动发电机的付柴油机可分为持久功率及超额功率两级,而推进用的柴油机则应分为试航功率、最大使用功率和正常使用功率三级。本文给出了上述各种功率的科学定义和经验比例。额定功率的标定基础是标准大气条件和安裝条件,标准大气条件的选择原则应根据国内大部份柴油机车间的条件而定,而使用者別应根据具体航区和船的用途重新标定持久使用功率。本文建议的标准大气条件为736毫米汞柱,20℃和70%湿度,并提出进气系统真空度不超过150毫米水柱、排气背压应为30~100毫米汞柱。目前使用的各种额定功率及耗油率修正计算方法差别较大,本文对非增压柴油机分别按每循环供油量不变及燃烧空气过量系数不变两种情况提出了新的修正计算公式。运用本文介绍的公式计算结果与试验结果,比较表明本文建议的公式比较合理,但仍略偏于保守。船上机仓内的大气条件与工厂条件相差较大,投使用功率的选定应以机仓大气条件为准。作者根据统计提出适合在远...

船用柴油机功率的定义在设计、制造和使用各方面缺少统一的理解,以致使用时常常出现柴油机功率满足不了需要的问题。本文提出船用柴油机功率分级应从制造及使用两方面分别加以考虑:从制造方面可分为最大功率、额定功率和超额功率三级;从船上使用方面,驱动发电机的付柴油机可分为持久功率及超额功率两级,而推进用的柴油机则应分为试航功率、最大使用功率和正常使用功率三级。本文给出了上述各种功率的科学定义和经验比例。额定功率的标定基础是标准大气条件和安裝条件,标准大气条件的选择原则应根据国内大部份柴油机车间的条件而定,而使用者別应根据具体航区和船的用途重新标定持久使用功率。本文建议的标准大气条件为736毫米汞柱,20℃和70%湿度,并提出进气系统真空度不超过150毫米水柱、排气背压应为30~100毫米汞柱。目前使用的各种额定功率及耗油率修正计算方法差别较大,本文对非增压柴油机分别按每循环供油量不变及燃烧空气过量系数不变两种情况提出了新的修正计算公式。运用本文介绍的公式计算结果与试验结果,比较表明本文建议的公式比较合理,但仍略偏于保守。船上机仓内的大气条件与工厂条件相差较大,投使用功率的选定应以机仓大气条件为准。作者根据统计提出适合在远洋、东南海及比海航行的三种船舶之标准机仓大气条件;同时推荐了在送定使用功率计算中为考虑磨损、转速不稳性及功率贮备等因素所采用的系数。对于发电用的柴油机船上使用功率一般为额定功率的76~82%,对于推进主机则为70~79%。近年来,在我国船舶上,通常发现由于各方面对船用柴油机功率标定缺少统一妁理解,往往引起柴油机的实际使用功率超出其能力,以致引起柴油机超负荷、螺旋桨转速或发电量达不到设计要求,严重的甚至会引起发动机损坏。柴油机功率按不同大气条件的修正亦常常引起制造厂与验收部门的争执。这些问题虽然在我国有关标准中已作了某些规定,但仍有继续探讨的必要。本文着重对额定功率与使用功率的关系、标准大气条件的确定以及功率和耗油率按大气条件变化的修正等问题提出一些看法。

 
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