具有模糊约束条件的连杆机构优化设计

优化设计中的约束条件有许多是模糊的,用精确数学不能准确地描述这种情况。本文用模糊数学中的隶属函数来描述这种模糊边界,参照罚函数法的思想提出了一种新方法——模糊罚函数法,并用本方法进行了四杆机构轨迹综合的优化计算,获得了满意的结果。     

杂糅与调试——解读李泽厚“天人合一”的关学思想

“天人合一”是李泽厚始终关注的话题,他通过运用“西体”——马克思主义实践哲学和康德主体性哲学,对中国传统思想——“天人合一”进行消解与重构,认为“天人合一”不再是基于农业小生产的“顺天”、“委天数”,“天”不再是主宰与命定的决定者;人不是被动的,而是积极能动的。人通过实践,实现感性与理性的“积淀”,并运用这一“积淀”去实践于自然,实现人“自然的人化”和“人的自然化”,从而实现“天人和一”,“杂糅与调试”是李泽厚“天人合一”思想的特点。     

起重电磁铁的计算机辅助优化设计

本文提出一种起重电磁铁优化设计的计算机程序系统.由于优化设计采用了磁场模型,使计算准确性大为提高,也能使电磁铁导磁体部分的磁场均匀分布.磁场模型的采用必然要使计算工作量成倍增加,本文采用的恰当罚函数法寻优,有效地节省了搜索时间.系统由PLOT 10 IGL计算机绘图技术支持,能实现自动绘图.对软件包的考核证明,优化设计结果与现有工厂产品比较,经济技术指标均有明显提高.     

一类双层规划的恰当罚函数的存在性

本文讨论的极小化双层规划是：其第一层中的目标函数是凸的且约束是线 ，其第二层是带有参数的线性规划。本文提出了一种恰当罚函数法，给出了此双层规划具有这种恰当罚数法的充要条件。与线性双层规划的有关结果相比较，本文的推广是两方面的，其一是目标函数可以为非线性，其二是第二怪中的目标函数允许在两层中的线性约束所刻划的多胞形上为无下界。     

“激励法”在护理工作中的运用

本文运用“激励法”思想及其手段与护理工作相结合。实践证明,正确恰当地运用“激励法”,不仅可以充分调动护理人员的主观能动性和积极性,而且可以使护理工作质量得到保证。     

体育史课堂"分组讨论"教学模式研究

为推进体育理论教学方法、教学手段的改革，改善传统的、单一模式的体育史教学方式．真正实现创造型、创新型、创业型“三创”人才培养。在合作学习和交往教学理论指导下，结合当今“自主创新”教学模式，“以人为本”等教育思想和“自主创新”教学模式的实践经验，我们设计了体育史课一种新颖的教学方式——“分组讨论式”教学模式的实验。     

浅谈思想政治课教师的语言艺术

苏联教育家苏霍姆林斯基指出":教育的艺术首先是语言的艺术。"思想政治课的教学效果,在很大程度上取决于政治课教师的语言表达能力。因此,一个合格的思想政治课教师也应该是一位语言艺术大师,即在最恰当的时机,用最恰当的词语,解决学生最需要解决的问题,实现政治课教学的艺术化。     

基于改进DPSO算法的航空发动机失谐叶片排序

通过叶片模态实验获得叶片失谐参数,建立了叶盘系统动力学模型,提出了一种新的排序方式.在标准粒子群算法中引入遗传算法的交叉算子和变异算子以及遗传选择的思想,利用罚函数法兼顾错频与减振的应用需求,保留了粒子群算法收敛较快的优秀特性,改善了粒子群的全局寻优能力,并得到比其他优化算法精度更高的排序结果.结果表明,恰当的叶片排布顺序可有效降低叶盘系统振动局部化,采用提出的离散遗传粒子群算法进行叶片排布可使叶盘系统振动幅度较小或者在可接受范围内.     

学生对老师妙语的点评

一,举座皆惊的开场白在我们高三毕业生欢送会上,作为班主任的马老师给我们的致词,他一开口就让我们疑窦丛生——“我原来想祝福大家一帆风顺,但仔细一想,这样说不恰当。”这句话把我们弄得丈二和尚摸不着头脑,大家摒声静气地听下去——“说人生一帆风顺就如同祝某人万寿无疆一样,是一个美丽而又空洞的谎言。人生漫漫,必然会遇到许多艰难困苦,比如…     

雪山奇葩——雪兔子

“藏家有了你，高原如此美丽……雪山有了你，永远不会融化。”借用这几句人们熟悉的歌词来形容“棉毛植物”——雪兔子，那是再恰当不过了。相信很多人乍一听“雪兔子”都会误以为是雪地里的兔子。其实不然，“雪兔子”并非兔子，也不能蹦跳，而是一种植物，被称作“雪山上的精灵”。     

Markedness and its Interpretation in Language Use

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.     

Features of Women's language

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

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.     

低渗透非均质砂岩油藏启动压力梯度研究

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。     

On Tragic Consciousness In The Works By Ernest Hemingway

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.     

Achieving Unusual States of Matter Under High Pressure

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-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

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