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1.
分析了NGOSS中策略管理和过程管理的互补性,研究了NGOSS中策略管理的策略间协作需求,提出了一种在NGOSS中综合应用策略管理和过程管理的方法,即运用过程管理来改进策略管理中存在的不足的方法,并对其进行了实验验证。实验证明,这种方法实现了NGOSS中策略之间的协作,改进了策略管理中存在的不足,实现了基于策略的“闭环”方式的管理系统,提高了NGOSS系统的管理功能。  相似文献   

2.
本文分析了机械设计中零件公差的选择,探讨了机械设计中零件公差标准的适用范围与公差选用中需要注意的问题,论述了机械设计中零件公差的运用。  相似文献   

3.
周富臣 《计量技术》1989,(12):45-48
本文阐述了单一中径的测量方法。着重论述了螺距误差不对单一中径的测量产生影响,并给出了单一中径测量的误差公式,它不同于传统的三线法误差公式。还证实了用非理想三线测量单一中径也是可行的。最后,给出了作用中径的计算方法和实例。  相似文献   

4.
随着经济的发展,中低压农网应用范围越来越广,解决了绝大多数农村的用电问题,带动了农村经济的发展。由于中低压农网较复杂,因此施工中必须注意多种事项。本文主要介绍了中低压农网改造升级中存在的问题及原因,并提出了中低压农网改造升级中的典型经验,希望可以给同类工程提供借鉴。  相似文献   

5.
本文分析了螺纹中径、单一中径之间的关系,并根据螺纹跨线测量精确公式导出了计算中径、单一中径的公式。  相似文献   

6.
本文分析了变电运行管理中存在的危险点及求,阐述了变电运行管理中存在的危险点类型,并及时提出了变电运行管理中危险点的防范措施。  相似文献   

7.
文章对JJG 343—2012《光滑极限量规检定规程》中形位误差、量规尺寸、作用尺寸等名词进行了解释,通过举例说明了如何依据规程中提供的技术参数在实际检定过程中计算量规极限尺寸。分析了规程中有关形位误差与尺寸误差之间的关系及两者关系对检定结果的影响,对检定证书格式中有关量规尺寸如何给出进行了探讨,同时指出了规程中存在的一些错误信息。  相似文献   

8.
一种无频带错位的小波包算法   总被引:5,自引:0,他引:5  
研究了数字信号处理中的小波分析方法。基于多尺度分析的思想,提出了信号的小波分解及重构新算法和小波包算法。由于算法中采用了频移技术,在小波分解中避免了频率的折叠现象,同时在小波包算法中也解决了频带的错位问题。算法在工程中更具实用价值  相似文献   

9.
文章分析了机械制造过程中进行质量控制的重要性,剖析了影响机械制造过程中机械质量的主要因素,并提出了机械制造过程中进行质量控制的方法与对策。  相似文献   

10.
OpenGL下的复杂建模转换和交互式动画   总被引:2,自引:1,他引:2  
利用VC环境下OpenGL绘制三维模型的方法,解决了多媒体教学软件中动画的可交互性。详细介绍了如何实现将复杂模型从3DSMAX中转换到OpenGL中的过程,该方法克服了3DSMAX编辑动画的不可交互性,同时简化了OpenGL中建模的复杂性。另外,针对3DSMAX制作动画不可交互性的缺陷,还介绍了如何在VC中添加教学中要用到的交互式动画控制的步骤。  相似文献   

11.
孙卫  樊晓光  李立 《工程数学学报》2005,22(6):1070-1074
为了求解非自制指标-1的微分-代数系统,我们研究基于Runge-Kutta方法的动力学迭代过程,得到相关的非线性微分-代数方程的收敛理论,这类迭代过程具有一般性和灵活性,且沿着时间域网格点可以选取不同的插值函数.  相似文献   

12.
The powder distribution and interaction between the laser beam and powder flow affect the deposition quality during the process of laser direct energy deposition with a continuous coaxial nozzle. In this paper, some key analytical formulae related to the laser beam-powder flow interaction are comprehensively deduced and validated. The powder distribution formulae for different regions are first established considering the divergence angles of powder jet. The energy attenuation formulae of laser beam passing through the powder flow are derived considering the change of powder distribution from annular to circular Gaussian modes. The temperature formulae of powder particles passing through the laser beam are derived based on a proposed temperature formula with the solid-liquid phase transition, and the powder temperature is also further analyzed. These formulae are validated by published deposition examples and used to analyze the laser beam-powder flow interaction.  相似文献   

13.
水压控制爆破药量计算公式   总被引:3,自引:1,他引:2  
本文分析研究了常用的九个水压爆破药量计算公式,根据十几次水压爆破的成败经验,建立了水压爆破药量计算的综合经验公式,其计算结果与实际用药量的爆破效果表明,这个公式符合得比较好。最后给出了五个实例的对比计算结果。  相似文献   

14.
Simple formulae for the estimation of the intensity of X-rays generated by relativistic particles in various processes are found. These formulae enable us to compare the efficiency of different radiation mechanisms for obtaining quasi-monochromatic X-rays and Mössbauer gamma-rays.  相似文献   

15.
Formulae for Arithmetic on Genus 2 Hyperelliptic Curves   总被引:1,自引:0,他引:1  
The ideal class group of hyperelliptic curves can be used in cryptosystems based on the discrete logarithm problem. In this article we present explicit formulae to perform the group operations for genus 2 curves. The formulae are completely general but to achieve the lowest number of operations we treat odd and even characteristic separately. We present 3 different coordinate systems which are suitable for different environments, e. g. on a smart card we should avoid inversions while in software a limited number is acceptable. The presented formulae render genus two hyperelliptic curves very useful in practice.The first system are affine coordinates where each group operation needs one inversion. Then we consider projective coordinates avoiding inversions on the cost of more multiplications and a further coordinate. Finally, we introduce a new system of coordinates and state algorithms showing that doublings are comparably cheap and no inversions are needed. A comparison between the systems concludes the paper.Acknowledgement First of all I would like to thank Gerhard Frey and Henri Cohen for encouragement and interest. Furthermore, thanks go to Roberto Avanzi for proof reading and to Bertrand Byramjee, Sylvain Duquesne, Guilhem Castagnos, and Marc Stevens for spotting some typos in the formulae of the previous papers [20, 21, 22]. I acknowledge the help of MAGMA to check the consistency of the formulae.  相似文献   

16.
浅层水中爆炸冲击波压力的测试与分析   总被引:3,自引:1,他引:2  
高勇军  王伟策 《爆破》1999,16(1):9-13,35
浅层水中爆炸研究是一个十分复杂的问题。本文根据对浅层水中单个球形药包爆炸的冲击波骑数的试验研究,详细地推导了分析爆炸场压力分布与变化规律的多元线性回归模型,并根据试验获得的数据给出了在试验范围内的冲击波压力的经验计算公式。  相似文献   

17.
Complex hypersingular integrals and integral equations in plane elasticity   总被引:7,自引:0,他引:7  
Summary Complex hypersingular (finite-part) integrals and integral equations are considered in the functional class of N. Muskhelishvili. The appropriate definition is given. Three regularization (equivalence) formulae follow from this definition. They reduce hypersingular integrals to singular ones and allow to derive hypersingular analogues for Sokhotsky-Plemelj's formulae and for conditions that are necessary and sufficient for the function to be piecewise holomorphic. Two approaches to get and investigate complex hypersingular equations follow from these results: one of them is based on the equivalence formulae; as to the other, it is based on above-mentioned conditions. As an example, authors' equation for plane elasticity is studied. The existence of a unique solution is stated and some advantages over singular equations are outlined. To solve hypersingular equations the quadrature rules are presented. The accuracy of different quadrature formulae is compared, the examples being used. They confirm the need to take into account asymptotics and to carry out a thorough analytical investigation to get safe numerical results.  相似文献   

18.
The efficiency of chillers (refrigeration and heat pump devices) is limited by the dissipation from their principal components: compressor, throttler, and heat exchangers at the condenser and evaporator. Developing a generalized finite-time thermodynamics model for reciprocating chhillers, we derive analytic formulae for how the fixed finite resources of cycle time and heat exchanger inventory should be allocated so as to optimize chiller performance. Our predictions for optimal operating schemes are compared with detailed experimental data from two different commercial chillers. The agreement between theory and actual performance data attests to the empirical wisdom that has evolved in chiller manufacture. Besides quantitatively documenting the individual sources of irreversibility, we show how the limitations of currently-available chiller components affect optimal chiller design, as well as how potentials steps to improve chiller efficiency can be evaluated within a universal thermodynamic framework.  相似文献   

19.
在复杂应力状态下厚壁圆筒的极限分析   总被引:4,自引:0,他引:4  
应用双剪统一强度理论,考虑材料的拉压异性和同性,推导了在内压力和轴力联合作用下的厚壁圆筒的塑性极限载荷计算公式,并且绘制了其极限载荷线图。在这些计算公式中,当其系数取不同的值时,就能得到按Tresca屈服准则、线性逼近的Mises屈服准则和双剪应力屈服准则的计算结果。应用其极限载荷线图,根据其承受的载荷大小,就能判断厚壁圆筒是否达到了屈服极限状态。绘制了在不同屈服准则下的极限载荷线图,以便对其差异进行比较。  相似文献   

20.
A Francis  K Haynes 《Strain》1991,27(3):95-103
A detailed investigation into the source of the unmounted apparent strains in resistance strain gauges over a temperature range of 20°C to 550°C is presented. Different measuring systems give different values of unmounted apparent strain. Formulae for two different measuring systems relating the unmounted apparent strains to resistance values are derived. Values computed from these formulae using measured values of resistance are compared with values of unmounted apparent strains measured directly. In addition, formulae which are essential in order to relate the actual strain to the indicated strain are derived for each of the systems. It is shown using the derived expressions that the magnitude of the unmounted apparent strains can be reduced considerably by connecting a shunt resistor across the active element.  相似文献   

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