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1.
对于中国学习者来说,日语中的汉字及汉语词汇的记忆问题是一个难题。采取逐一攻破法、拆解组合法、还原法等记忆方法对日语学习有帮助。  相似文献   

2.
词汇量的大小影响大学英语学习的效果,本文介绍一些实用记忆方法,如词根词缀法,联想分类组合法及以熟促生法帮助扩大词汇量.  相似文献   

3.
给出了数学概念拓广的四种具体途径:背景回归抽象法,推论特征化方法,层晰法和组合法;并指出了对数学概念类进行一般化系统分析,不仅有助于理解数学,而且也有助于研究和发展数学.  相似文献   

4.
为了提高DEM模型的精度,对双高次多项式曲面法和加权平均法的缺点进行了分析,提出一种有效的双高次多项式曲面加权平均组合方法.在某地区选取75个数据点作为起算数据,通过实验发现,双高次多项式曲面加权平均组合法能够有效地弥补双高次多项式曲面法和加权平均法的缺陷,建立的DEM模型精度要高于双多项式曲面法及加权平均法建立的DEM模型精度,对工程实践具有一定的参考价值.  相似文献   

5.
浅谈新产品开发的创意   总被引:1,自引:0,他引:1  
范敏 《山西科技》1998,(4):23-25
新产品创意是新产品诞生的摇篮,同时又是一个思维过程。有了新的创意,并等于新产品开发的成功。这里有误区。有逆向思维法、物理转移法、功能组合法、相似诱发法等几种。  相似文献   

6.
为了有效地预防青海东部黄土滑坡的发生,本文重点研究了该区黄土滑坡的诸多因素,总结出异常现象法和因素组合法的预测方法。  相似文献   

7.
本文在深入研究了三维网格重分技术的基础上 ,针对轴类锻件的网格重分提出了一种简洁、有效的算法———投影组合法 ,并用等参逆变换法对重分前后的场量进行转换。模拟实例表明 ,该算法生成的网格质量好、数据转换精度高。  相似文献   

8.
介绍了脱氧核糖核酸(DNA)电化学传感器的原理并重点评述了DNA在不同材料电极表面的固定化技术,对比了吸附法、共价键合法、自组装法、亲和素-生物素反应系统固定法以及组合法固定DNA在构建DNA电化学传感器中的特点.参考文献64篇.  相似文献   

9.
将样条子域法及有限条法的基本原理组合,处理不同边界条件的非规则板的弯曲,扩大了两法的应用范围。和有限元相比,具有计算量小、精度高、程序编制方便、容易在微机上实现等优点。在工程设计和计算工作中便于推广使用,并给出了几个实际算例。为了验证组合法的可靠性,还做了一个内外边界均为固支的开大孔板的弯曲实验,计算值和实验值结果相当符合。  相似文献   

10.
针对非平稳性条件下不同区域洪水间组合设计值计算难题,采用Copula函数构建了可综合考虑不同区域洪水边缘分布非平稳性和洪水间相依结构非平稳性的变参数Copula模型,分析了不同区域洪水间联合分布规律随时间的演变特征。基于等可靠度法和条件期望组合法,提出了变化环境下设计洪水地区组成分析方法,实现了非平稳性条件下不同区域洪水组合设计值的计算。以寸滩站和宜昌站年最大15 d洪量系列为例,分析了两站洪量及其区间洪量的变化特征。结果表明,寸滩站和宜昌站的洪量系列均具有减少趋势,两站洪量的联合分布随时间变化,指定重现期对应的宜昌站、寸滩站及寸滩—宜昌区间洪水设计值随使用年限的增加而减小。  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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