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1.
引入了交错BCI──代数的概念,研究了交错BCI──代数的一些重要性质,证明了交错BCI──代数与结合BCI──代数等价。  相似文献   

2.
本文采用龙格──库塔法对动力学中不规则的受力问题和不规则的变质量问题进行数值分析。文章通过编程上机,绘制了位移──时间曲线、速度──时间曲线和加速度──时间曲线。  相似文献   

3.
方言区成人"普通话"教学具有以下特性:方言性,成人性,成人教育的特殊性。据此,本文提出了一套有效的教学流程:激发兴趣──晓以利害──营造气氛──传授知识──介绍方法。  相似文献   

4.
本文认为毛泽东廉政建设思想具有以下特点:即廉洁奉公,勤政为民──宗旨的鲜明性;从严治党、从严治政──主张的一贯性;惩腐肃贪、严厉果断──举措的震慑性;身先垂范、严法自律──作风的表率性;以历史为鉴、纳诤友之言──注重现实的指导性等。并逐一进行了论述。  相似文献   

5.
本文认为,当前腐败现象产生和存在的主要原因有:历史的根源──剥削制度的残余影响;现实的原因──新旧体制杂交引起的弊端;精神的因素──腐败主体道德理性的贫困。  相似文献   

6.
经络研究分为文献研究与实验研究,主要是实验研究。经络是古老的中医概念,而实验研究是利用现代科技研究经络,其主题与手段之间存在着巨大反差。经络研究具有交叉学科性质,其复杂性和难度不可低估,干什么,怎样干,需要认真论证。一、经络名不正则言不顺,经络研究还必须从经络本身起源说起。经络是中医学特有的概念,西医学没有对应的东西。中医认为人体有十二正经和奇经八脉。十二正经为:肺──手太阴经;心──手少阴经;心包──手厥阴经;大肠──手阳明经;小肠──手太阳经;三焦──手少阳经;脾──足太阴经;肾──足少阴经…  相似文献   

7.
文[1]讨论了循环矩阵的对角化问题。本文讨论更广泛的一类循环矩阵──Z─循环矩阵。首先确定了交换环上Z──循环矩阵集的代数结构,然后解决复Z──循环矩阵的对角化问题。  相似文献   

8.
针对市场经济和改革开放对大学生思想观念造成的影响,在高校马克思主义理论课教学中,从有的放矢──增强针对性、充实内容──增强时代性和改进方法──增强有效性三个方面进行了教学内容、教学方法的改革,以增强马克思主义理论课教学的吸引力。  相似文献   

9.
精读文章的基本规律是要遵循形式──内容──形式的原则,即由形式入手去理解文章的内容;在理解内容的基础上再去学习文章的形式。同时还要遵循整体──局部──整体的原则,即在通读文章整体的前提下去分析文章的局部;在透彻理解局部的基础上再去把握文章的整体。  相似文献   

10.
采用乳液聚合法合成了丙烯酸酯──丙烯酸──丙烯酰胺的共聚物。其中PAO-100具有良好的抗泳移效果。  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.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

14.
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   

15.
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   

16.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

17.
There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.  相似文献   

18.
In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.  相似文献   

19.
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   

20.
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   

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