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1.
FMS集成设计系统的研究与开发   总被引:1,自引:1,他引:0  
运用并行工程的基本原理,采取面向对象的统一建模方法对FMS生命周期的各个阶段进行集成研究,开发了一个集FMS规划设计,计划调度,控制及仿真为一体的集成设计系统。了该集成设计系统的总体结构及主要功能模块。  相似文献   

2.
FMS集成开发环境的研究   总被引:1,自引:0,他引:1  
为了适应快速和高效建造FMS以及重构FMS的需要。本文介绍的FMS集成开发环境由三个部分组成,即FMS而已自动生成系统,运控软件自动生成系统和测试仿真系统,使用该集成开发环境能进行FMS而已设计,能生成运控软件,并能对生成的布局,运控软件进行测试和仿真。  相似文献   

3.
运用并行工程的基本原理,采取面向对象的统一建模方法对FMS生命周期的各个阶段进行集成研究,开发了一个集FMS规划设计、计划调度、控制及仿真为一体的集成设计系统.介绍了该集成设计系统的总体结构及主要功能模块.  相似文献   

4.
通过对FMS诊断信息和诊断知识的类型及特点的分析,提出并实现了FMS智能诊断的信息集成策略和知识集成模型  相似文献   

5.
基于FMS统一模型框架的机床设备选择研究   总被引:3,自引:0,他引:3  
提出一种面向对象的FMS统一模型框架,在该统一模型框架下,FMS各子问题将以一种相互关联和集成的方法得以解决,研究了在上述统一模型框架下的FMS机床选择问题的建模与求解方法。  相似文献   

6.
FMS智能诊断的信息集成和知识集成   总被引:2,自引:0,他引:2  
通过对FMS诊断信息和诊断知识的类型及特点的分析,提出并实现了FMS智能诊断的信息集成策略和知识集成模型。  相似文献   

7.
提出一种面向对象的FMS统一模型框架,在该统一模型框架下,FMS各子问题将以一种相互关联和集成的方式得以解决.研究了在上述统一模型框架下FMS机床设备选择问题的建模与求解方法  相似文献   

8.
采用集成V/F转换器件LM331和MCS-51单片微型计算机系统设计构成简单、精密的数字积分器,通过V/F转换斜率调节成为直读式库仑计,用以在基础物理化学实验测定电量,收到满意的效果.  相似文献   

9.
本文介绍了在光纤/同轴混合网(HFC)中,用于数字视频信号传输的单片集成正交移幅键控(MQAM)调制/解调器的原理,说明了MQAM调制/解调器状态寄存器参数的设计方法,最后给出了实测结果。  相似文献   

10.
以全集成MOSFET电流传输器[CCⅡ±]为基础提出了一种积分电路平衡结构,并对其消除非线性因素进行了理论分析,同时提出了相应的基本电路元件的有源RC双T滤波器平衡模式。利用SPICE(Ⅱ)通用模拟电路程序,对以[CCⅡ±]为基础的一个全集成MOSFET-C平衡结构6阶低通切比雪夫滤波器输出电压幅频特性和相频特性进行了仿真分析,得到了实用的结论。  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

15.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

16.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

17.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

18.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

19.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

20.
For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the  相似文献   

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