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a process     
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  过程
     Designing a Process Control System by Z-80 Microcomputer
     用Z-80微机设计过程控制系统
短句来源
     A Process Control Scheme Based on Knowledge
     一种基于知识的过程控制方案
短句来源
     The Thermodynamic Calculation of a Process Represented by a Line in the P-V Diagram
     在P—V图中以直线线段表示过程的热力学计算
短句来源
     ANALYSING THE REVERSIBLE P=KV ̄n+a PROCESS OF THE IDEAL GAS
     理想气体可逆P=kV~n+a过程吸、放热的分析
短句来源
     A process control system of stepped rolling for the cone type piercer and Accu-Roll Mill
     菌式穿孔机及Accu-Roll型轧机阶梯形轧制过程控制系统
短句来源
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  一个过程
     Image segmentation is a process of separating the target contour after marking the objects of the background according to the prior knowledge.
     图像分割就是根据目标和背景的先验知识对图像中的目标背景进行标记,然后将要识别的目标从背景中分离出来的一个过程
短句来源
     A process model of the enterprise strategic business portfolio transformation and it' s chaos character analysis
     企业战略性业务转型的一个过程模型及其混沌特征分析
     Data mining is a process, which needs to be adjusted continuously. The process of data mining consists of the following stages: business problem definition, system preparation, data preparation, modeling, evaluation, Knowledge Discovery and application.
     通过总结数据挖掘方面的成功经验,数据挖掘其实是一个过程,是一个要不断反复调整的过程,这个过程一般要经过如下几个步骤:业务问题定义、体系与技术准备、数据准备、模型建设与测试验证、知识发现与应用。
短句来源
     To build up the unified information Portal for the enterprise is an effective process to integrate the enterprise information resources as well as a process to transform the
     企业统一信息门户系统的建立,这是一个有效的整合企业信息资源的过程,也是传统型信息化向现代型信息化转变的一个过程,具有较强的使用价值和推广价值。
短句来源
     It introduces the software and hardware which are specially designed for a process control experimental system.
     介绍的是为一个过程控制实验系统而专门设计的控制软件和硬件系统,系统设计中用分布组件编程方式融入到Web中,实现了系统的远程通信。
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  一种过程
     As a leading criticism of Chinese literature in the 20~(th) century,realism is born in the identity to nation-state,which appeares a process from naturalism of science discourse to the realism of literature discourse and from nation-state to the realistic literature.
     作为20世纪中国文学中的一种主要的批评话语,现实主义批评话语首先作为一种科学话语产生于民族国家的认同中,它表现为从科学话语的自然主义到文学话语的现实主义,从民族国家到现实主义文学的一种过程
短句来源
     Then, based on the structure and using Web services as the key technology, we propose a Process Control Systems' Integration Framework (PCS-IF).
     然后在此基础上以Web服务为核心,提出了一种过程控制系统集成框架(PCS-IF)。
短句来源
     A Process Definition Model and its Verification Analysis
     一种过程定义模型及其验证性分析
短句来源
     Information Display Board (IDB) is a process tracing technique, which shows an m×n information matrix to subjects and monitors their information acquisition behavior. Researchers employ this technique to study subjects information searching and acquiring process in problem solving and decision-making.
     信息显示板(Information Display Board, IDB)实验是一种过程跟踪技术,以m×n矩阵方式呈现信息阵列,通过观测被试信息检索和浏览的一系列行为,来研究被试问题解决和决策中的信息获得(information acquisition)过程。
短句来源
     With the combination of project management and WfMS, a process frame method is proposed to solve the distributing and concentrated control problem of task in VE environment.
     同时将项目管理与WfMS相结合 ,提出一种过程框架的方法来解决VE运营过程中任务的集中和分布控制问题
短句来源
更多       
  a过程
     In order to conduct VV&A process and T&E process effectively during M&S full life cycle, it is very necessary to discuss the relationship of M&S, VV&A and T&E.
     为了在M&S全生命周期中有效地进行VV&A过程和T&E过程,探讨M&S、VV&A、T&E三者的关系是非常必要的。
短句来源
     Based on the systemic conclusions of development principle of the MDA based system and federation develop-ment and execute process model(FEDEP),the technology advantages of the HLA simulation system development based on MDA is summarized. The FEDEP and federation VV&A process based on MDA are simply discussed.
     在系统地总结了MDA系统开发原理以及联邦开发和执行过程模型(federation development and execute process model,FED-EP)的基础上,归纳了应用MDA系统开发方法进行HLA仿真系统开发的技术优势,初步探讨了基于MDA的FEDEP和联邦VV&A过程
短句来源
     Secondly, a process model of the system VV&A is built on the viewpoint of the whole life-cycle of VV&A.
     本文立足生命周期的VV&A观点,建立了该系统的VV&A过程模型。
短句来源
     In view of planning and developing structured and organized VV&A activities,the paper presents a modified model which brings the Data V&V into VV&A process model and modifies the stages of Results Accreditation and Documentation in the U.S DMSO VV&A process model for extending the application scope.
     该模型是综合现有VV&A过程模型,通过在DMSO所提出的VV&A过程模型基础上引入数据V&V,并通过对结果确认、信息归档等VV&A过程模型中的几个重要阶段进行调整,实现了对VV&A过程模型的改进,以期扩大拓展VV&A过程模型的适用范围,为M&S经济、高效地执行产生一定的促进作用。
短句来源
     Firstly, the dissertation introduces the HLA Federation Development and Execution Process (FEDEP). Based on the basis of HLA FEDEP, it puts forward one VV&A process model of FEDEP and analyses VV&A activities, products and management in each step. It also gives the description method of the process, and describes the process with IDEFO method.
     论文在介绍HLA仿真系统的联邦开发和运行过程(Federation Development and Execution Process, FEDEP)的基础上,围绕FEDEP提出了一个改进的VV&A过程模型,分析了该模型每个步骤的VV&A活动,并使用IDEF0方法进行了描述;
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  a process
The indirect method, a process-based method, is based on the mechanics of carbon transfer in the ecosystem and can potentially improve the spatial resolution of the SOC estimation if the input variables have a high spatial resolution.
      
This model, which is built for centralized collaborative design work, includes an analytical frame, a process view model, a function view model and an information view model.
      
To satisfy the needs of the high deep-width ratio and thickness of a planar micromotor's stator windings, a process method to produce an electromagnetic planar micromotor with AZ4903 is proposed.
      
A cavity appears in a process cycle of 'formation-growing up-collapsing-fluidization' at a high gas velocity.
      
From the analyses of combustion process, it is also found that diesel HCCI combustion is a process with a finite reaction rate and is very sensitive to injection timing and injection mode.
      
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2-Isopropyl-5-methyl-7-ketohexamethylenimine was prepared by a process starting with men-

1.2-异丙基-5-甲基-7-酮-氮七圜是由薄荷醇开始按照与 Wallach 非常相似的方法制备的。2.用氢化铝锂将2-异丙基-5-甲基-7-酮-氮七圜还原成为2-异丙基-5-甲基-氮七圜。此化合物与三氯乙醛起作用,成为1-甲酰基的衍生物;此物再用氢化锂还原生成1-甲基-2-具丙基-5-甲基-氮七圜。3.2-异丙基-5-甲基-氮七圜与氯乙醇作用,生成其1-(β-羟乙基)的衍生物;此衍生物和氯化亚硫酰起反应而变成1-(β-氯乙基)-2-异丙基-5-甲基氮七圜的盐酸盐。4,1-(β-羟乙基)-2-异丙基-5-甲基氮七圜的对硝基苯甲酸酯及对氨基苯甲酸酯,皆用常法制备,对后者的局部麻醉效能曾作测定,但因刺激性过强,未宜作此种药品用。

After the construction of reservior in an alluvial stream, the equilibrium condition of the downstream channel will be upsetted due to the reduction of sediment supply. This will result in a change in the form and gradient of the channel. The direction of the displacement will lead to a reduction of the sediment carrying capacity of the channel, through which the river regains its equilibrium. The whole process is accomplished by the flattening of the bed slope, as suggested by the theories generally accepted...

After the construction of reservior in an alluvial stream, the equilibrium condition of the downstream channel will be upsetted due to the reduction of sediment supply. This will result in a change in the form and gradient of the channel. The direction of the displacement will lead to a reduction of the sediment carrying capacity of the channel, through which the river regains its equilibrium. The whole process is accomplished by the flattening of the bed slope, as suggested by the theories generally accepted at the present. From a study of the fluvial processes of Colorado River and some other streams, it appears that a decrease in channel gradient is one of the three possibilities only, and should not be regraded as an universal rule. In fact, the change in bed slope below an impounding reservoir depends essentially on the geologic and geographic conditions of that area. It is first considered that the channel width does not change materially in the downstream direction. In many of the sandy rivers, there exists, a layer of gravel or pebble below the finer surface material. The inclination of this layer is generally steeper than the present bed slope. After the releasing of clear water from the reservoir, the surface material is carried away and thereby exposing the coarse layer, first near the dam and gradually extended to the downstream. This will result in an uneven erosion along the direction of the flow, and the steepening of the channel gradient is the consequence of such a process. The Colorado Eiver below the Hoover Dam belongs to this case. If the distribution of the bed material in the downstream, direction is more or less uniform, and if there exists no coarse layer within a finite depth below the bed surface, the bed will be degraded as a whole and the channel gradient remains essentially at its initial value. Results of flume study seem to indicate that such is the case. The Colorado Eiver below both the Parker and the Imperial Dam also belongs to this group. Only when there is a base level within a short distance from the dam which controls the depth of scour at that neighborhood, or if ther is a tributary which brings coarser material into the lower part of the reach, will the channel slope below the dam become flatter. On the other hand, if the river is impounded in a gorge and enters a plain not far away from the dam site, the width of the channel on the alluvial fan becomes progressively wider downstream. It is then possible that the depth of degradation decreases in the downstream direction and the slope becomes flatter. This case is well illustrated by one of the rivers in U. S. S. R. It must be realized that no matter how the channel gradient below an impounding reservoir changes, it is mainly through the coarsening of the bed material which makes the channel regains its equilibrium. Two different types of the coarsening of the bed material can be distinguished from the field data available. One of which is the exposing of a gravel or pebble layer below the present alluvium. As soon as this layer is exposed, there will be a sudden jump in the bed material size, and the stream channel becomes stable again. The othertype of coarsening of bed material takes place continuously and at a much slower rate. One often fails to notice the occurence of such a phenomenon, as the size of the bed material only increases in a relatively small amount. Yet, such a small increase in bed material size results in a much significantly rise of the roughness coefficient, by remolding the sand bars on the bed surface. Both the velocity of the flow and the sediment carrying capacity of the channel will be reduced, and the river gradually re-establishes its equilibrium. It is now possible to calculate such a proeess according to the theories on sediment transport and river roughness. Following the coarsening of the bed material, the down-cutting rate of the stream channel decreases with time. Both the flume studies and field measurements indicate that the relationship between the down-cutting rate and the cumulative time of erosion is an exponential one. This study demonstrates that the fluvial processes of an alluvial channel depend very much on the hydrographic conditions of the basin, of which the stream forms a part. One can't visualize the whole aspect of the problem (?)y studying the fluvial proteases through hydraulics, view-point only.

冲积河流上修建水库以后,下游河道将失去平衡。河流为了重新建立平衡,必将发生一系列的变化。本文对这—变化的过程,提出了一些新的概念。根据枢纽下游所在地区的地质地理条件,河流的坡降可以有各种不同的变化。坡降的渐趋和缓只是三种可能性中的一种,不能当做普遍规律来看待。河槽的重新建立平衡,主要是通过河床质的粗化作用。河床质的粗化现象具有两种不同的类型。一种是河床表层复盖物因清水冲刷而外移,露出了底下属于另一地质时代的较粗的卵石层,这时河床质的粒径会发生突变。另一种是由于水流的分迭作用,河床质的变化是连续的,徐缓的。在第二种情况下,河床质的粒径虽然变化不多,但是,通过河底沙垅的加多,却可以使曼宁糙率系数有很快的增加,这就使水流的流速降低,挟沙能力减小,河流逐渐建立起新的平衡。随着河床质的渐次粗化,河床的冲刷下切率与时俱減。野外实测结果及水槽试验成果都指出冲刷率与冲刷历时之间成一指数关系。河床质中不能为水流所挟运的颗粒所占百分比愈大,冲刷率下降得愈快,河道重新恢复平衡所需要的时间也愈短。从黄河下游的具体情况来判断,将来修建枢纽以后,下游河道在承受清水冲刷时可能作整体下降,坡降的变化不会很大。黄河下游的河床质虽然很细,同样也...

冲积河流上修建水库以后,下游河道将失去平衡。河流为了重新建立平衡,必将发生一系列的变化。本文对这—变化的过程,提出了一些新的概念。根据枢纽下游所在地区的地质地理条件,河流的坡降可以有各种不同的变化。坡降的渐趋和缓只是三种可能性中的一种,不能当做普遍规律来看待。河槽的重新建立平衡,主要是通过河床质的粗化作用。河床质的粗化现象具有两种不同的类型。一种是河床表层复盖物因清水冲刷而外移,露出了底下属于另一地质时代的较粗的卵石层,这时河床质的粒径会发生突变。另一种是由于水流的分迭作用,河床质的变化是连续的,徐缓的。在第二种情况下,河床质的粒径虽然变化不多,但是,通过河底沙垅的加多,却可以使曼宁糙率系数有很快的增加,这就使水流的流速降低,挟沙能力减小,河流逐渐建立起新的平衡。随着河床质的渐次粗化,河床的冲刷下切率与时俱減。野外实测结果及水槽试验成果都指出冲刷率与冲刷历时之间成一指数关系。河床质中不能为水流所挟运的颗粒所占百分比愈大,冲刷率下降得愈快,河道重新恢复平衡所需要的时间也愈短。从黄河下游的具体情况来判断,将来修建枢纽以后,下游河道在承受清水冲刷时可能作整体下降,坡降的变化不会很大。黄河下游的河床质虽然很细,同样也存在着粗化的可能。通过粗化作用,可以使河床下切的深度大大减低。

A method for the preparation of p-nitroacetophenone was developed on the principle of auto-oxidation of p-nitroethylbenzene. The product could be isolated in good quality by a process of simple freezing, Manganese acetate on calcium carbonate (1:10) was found to be the catalyst of choice. When a steady current of oxygen was bubbled through p-nitroethylbenzene at the rate of 0.55 ml. per minute for every gram of the mass, with stirring, at 140-145℃, and in the presence of catalyst equivalent to 0.005 to...

A method for the preparation of p-nitroacetophenone was developed on the principle of auto-oxidation of p-nitroethylbenzene. The product could be isolated in good quality by a process of simple freezing, Manganese acetate on calcium carbonate (1:10) was found to be the catalyst of choice. When a steady current of oxygen was bubbled through p-nitroethylbenzene at the rate of 0.55 ml. per minute for every gram of the mass, with stirring, at 140-145℃, and in the presence of catalyst equivalent to 0.005 to 0.01% by weight of Mn~(++), p-nitroacetophenone content could be raised to a maximum of 62% within 18 to 30 hours. p-Nitrobenzoic acid and formic acid were also formed alongside with p-nitroacetophenone in an amount approximately 10% its weight, together with probably a trace of nitrophenols which was not identified. From 453 g. of p-nitroethylbenzene, after oxygenation and being chilled, the crude product separated and washed with a solution of sodium carbonate at 70-80℃ to remove p-nitrobenzoic acid, 153-161 g. of p-nitroacetophenone was obtained, m. p. 79-80℃. Unchanged p-nitroethylbenzene could be reclaimed from the mother liquor by fractionation. The role of calcium carbonate in the catalyst is, however, not only that of a neutral carrier. It was shown to exert an important moderating effect on the decomposition of the peroxide radical which was essential for the maintainance of auto-oxidation reaction chain. When manganese acetate alone was used as catalyst, the reaction was usually rapid at the onset but of short duration. "Besides, the reaction would then be very sensitive to the presence of even minute amounts of copper and iron salts which were both potent peroxide destroyers. The presence of calcium carbonate would bring to a check these deleterious effects, giving reaction liquor of light colour and high phenone content. An un-identified inhibitor was found to be formed and accumulated during the reaction.

發展了自对硝基乙苯經自动氧化以制取对硝基苯乙酮方法。产品可用冷冻法析出。最好的接触剂为附着于碳酸鈣上的醋酸錳(10:1).在攪拌下向对硝基乙苯中通氧,速度为每克每分鐘0.55ml.,温度140~145°C,接触剂用量相当于0.005~0.01%Mn~(++),在18至30小时內对硝基苯乙酮含量可达62%。接触剂中的碳酸鈣的作用,並非一單純的不活潑性載体。我們証明了:它具有延緩过氧化物分解的重要作用,而过氧化物的存在,对于自动氧化反应链锁的得以持续是必要的。它也能抵消可能存在于原料中的微量銅鹽和铁鹽对过氧化物的强力破坏作用,以得到酮含量高、色澤淺的产物。此外尚發現在反应过程中有一种未經証实的抑制物生成並积累。

 
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