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1.
四川猪鬃产业发展始于19世纪末期。1891年,英商立德乐入川创办第一家猪鬃加工厂,开启了四川猪鬃开发的历史。外国洋行对四川猪鬃的最初开发先后经历了英商立德乐、英商隆茂、日商新利等时期。洋行对四川猪鬃业的开发,使四川猪鬃业从无到有;猪鬃外贸的迅速发展,使其成为四川对外贸易的重要商品。  相似文献   

2.
通过不同电压对亚麻织物进行染色,并对不同时间的染色残液进行吸光度的测定,再通过吸光度计算出上染百分率、平衡上染百分率、扩散系数。对其染色后的亚麻织物进行摩擦牢度和皂洗牢度的测定。从动力学方面对影响电化学染色的因素即扩散系数与电压的关系进行研究,实验结果表明,电化学染色比常规染色的上染率有所提高,扩散系数比常规的染色增大。  相似文献   

3.
2016年CBA总冠军归属四川金强.采用数据分析法、录像观察法、文献资料法以及逻辑分析法等,对四川金强男篮及其对手的各项数据进行对比分析,对其技战术特点等方面进行系统分析,根据其特点浅析四川金强的致胜因素,旨在为四川金强男篮今后的训练及备战竞赛提供理论参考依据.  相似文献   

4.
通过采用添加少量烯烃类高聚物的方法,制得可染共混丙纶,对其染色速度和染色平衡进行了研究。研究结果表明,染色速度与染色温度、染料结构有很大的关系,染色的等温吸附线属于Nernst型。  相似文献   

5.
天浩然 《科技咨询导报》2012,(20):219-219,221
四川藏区具有丰富的红色文化资源,不仅数量众多、分布较为广泛,而且类型齐全、品位较高,但是其价值并未得到合理开发和有效利用。开发四川藏区红色文化资源,应该对现有资源进行有效整合,进一步加大宣传力度,处理好保护与利用的关系。四川藏区红色文化资源保护与利用将立足于文化可持续发展的视角,以科学的方法,对资源类型和分布进行深入调查,对其保护现状与对策进行分析,以期促进四川藏区红色文化资源创新与发展。  相似文献   

6.
蚕豆根尖细胞微核实验方法的改进   总被引:10,自引:0,他引:10  
本文以改良石炭酸品红为染色液,代替常规Feulgen染色液,探讨其对蚕豆根尖细胞微核实验的染色效果.结果表明以改良石炭酸品红为染色液,可以得到很好的染色效果.  相似文献   

7.
从超分子化学角度研究了双萘环和单萘环通用染料在染色过程中的构效关系.对腈纶纤维染色时,由于双萘环染料分子对相邻阴离子染席的空间屏蔽作用,其上染率下降.对涤纶纤维染色时,染料分子自身的空间结构对上染率的影响不明显.对棉纤维染色时,由于双萘环染料分子对纤维的直接性好、磺酸基在分子中所占的比例低,其上染率提高.对羊毛和丝绸染...  相似文献   

8.
涡虫在动物系统演化史上占有十分重要的地位,雌雄同体,具有很强的再生能力,因此,对其生殖系统组织结构进行深入研究具有重要的意义.本文用2种染色方法(H.E染色、Masson染色)显示了日本三角涡虫(Dugesia japonica)雄性生殖管道的组织结构并对其进行了光镜观察.结果表明,该类涡虫雄性生殖管道是由输精囊、输精管、球腔、射精管4部分构成.  相似文献   

9.
由于材料的匮乏,过去很少有关于古代四川方言断代韵部的研究.在对宋代四川几位重要文学家的作品以及其它材料进行认真研究的基础上,分析了四川方言的语音系统,并揭示了其语音发展规律.  相似文献   

10.
对四川东部方言语音系统作了分析和探讨,通过其声、韵、调的对比来研究其差异,反映其语音发展规律.  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.
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   

13.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  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.
本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。  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.
19.
The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to  相似文献   

20.
Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with  相似文献   

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