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1.
李贵春 《天津师大学报》1997,17(2):15-19,26
在多目标线性规划中,当决策者对每个目标函数都有一个模糊目的时,本文综合两分法和线性规划方法,给出了一种新的求解方法,这种方法所需计算最少,有利于求解大规模多目标线性规划问题。  相似文献   

2.
所提出的混合整数线性规划的解法是利用目标函数来建立等值切割面,综合使用分支定界法、割平面法和枚举法,并在求解混合整数线性规划相应的线性规划问题时,运用两演段方法。它克服了上述方法各自单独使用在计算上的某些困难和不足,从而加速求解过程  相似文献   

3.
陈广斌 《科技信息》2012,(6):116-116
建筑材料取料在工程造价管理中的地位非常重要,如何运用科学的方法和手段,合理有效地取用材料,在节约造价,降低成本方面尤其重要。应用线性规划理论,可以解决平整场地,配料等等问题的最优化方法,对于提高材料利用率,降低成本非常有效。文章通过线性规划方法在实际工程取料中的应用,说明利用计算机辅助管理是提高建筑业施工管理水平、降低成本的一种有效途径。结合具体实例,深入探讨了线性规划原理在建筑施工实际中的应用,以提高经济效益。  相似文献   

4.
通过目标函数沿梯度正方向变化时在线性规划问题可行域边界超平面法向量方向变化大小的度量,给出了线性规划问题最优解的一个充分条件,提出了一种解线性规划问题的方法--方程排序求最优解法。  相似文献   

5.
模糊线性规划在企业生产管理中的应用研究   总被引:4,自引:0,他引:4  
在线性规划模型的基础上,探讨了模糊线性规划模型的建立和求解方法,将它作为一种模拟决策方法,应用于企业生产管理决策之中,结论表明,该方法对于解决企业的生产管理和决策问题是非常有帮助的。  相似文献   

6.
在多目标线性规划中,当决策者对每个目标函数都有一个模糊目的时,本文综合两分法和线性规划方法,给出了一种新的求解方法、这种方法所需计算量少,有利于求解大规模多目标残性规划问题  相似文献   

7.
最优线性规划法在土地利用总体规划中的应用   总被引:2,自引:0,他引:2  
探讨最优线性规划法对土地利用总体规划的适用性。方法:理论与实践相结合,采用最优线性规划法、专家打分法。结果:最优线性规划法在石柱县土地利用总体规划中有较好的适用性,能对土地利用结构进行定量优化,并能反映出该县土地利用的经济主导性、地域特殊性和国家政策约束性,符合土地利用总体规划的要求。结论:最优线性规划法适用于土地利用总体规划。  相似文献   

8.
通过对影响企业返修决策诸多因素的分析,阐述了线性规划是解决企业返修决策问题的有效方法;并通过对返修规划中目标函数和诸多实际约束条件的研究,建立了返修决策线性规划具体模型,说明了线性规划图解法和灵敏度分析在企业不合格产品返修经济分析中的应用。  相似文献   

9.
本文由结构分析的子结构模式和词载模式出发,提出一种荷载处理的线性规划馍型,可以在给定荷载特征的约束条件下,通过线性规划,得到各部分构件截面内力不利而载组台的最大值。文中拚弃现有工况组合的概念,给出荷载线性规划模型的理论与方法。  相似文献   

10.
本书详细地讲述了求解含有模糊数据的数学模型的最优化方法,如随机线性规划方法、区间线性规划、凸集和模糊数据集线性规划等,对模糊数据线性最优化理论框架也给出了详尽的说明,并论述了近年来这一领域的最新科研成果。  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.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

18.
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   

19.
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   

20.
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   

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