基于Matlab的纺织材料动态模型的数值解法

用Matlab求解伴有凝结发生时多孔织物的动态热湿传递数学模型,指出Matlab在运用有限差分方法和数值积分方法在纺织材料中对热湿传递模型求解的作用.对于不同材料的多孔织物介质中的温度、水蒸气浓度和含水量进行了数值计算与比较.数值模拟结果及其分析表明了数值算法的有效性.     

拒水整理对棉织物耐静水压的影响

通过用含氟拒水整理剂对纯棉织物进行拒水整理,可以使纯棉产品更新换代,提高其服用性能,增加产品附加值,扩大其使用范围.针对棉织物良好的亲水性能,采用两种不同的拒水整理剂对棉织物进行拒水整理.选择了整理剂质量浓度、交联剂质量浓度、醋酸质量浓度、焙烘温度和焙烘时间等几个主要影响因素,应用正交实验的方法考虑多因素对织物拒水效果的影响,并测试经整理后织物的拒水等级、耐静水压等指标,对测试结果进行方差分析,得出最佳工艺参数及工艺条件.同时得出用耐静水压值来表征相同类型亲水性织物拒水整理的效果较常规的拒水等级的方法更为精确.     

织物湿传导理论与实际的研究第一报:织物的湿传导过程与结构的研究

提出了织物湿传导通道的三种型式.指出了织物中透湿孔洞有多种多层次结构,横向尺寸相差甚大,在湿传导过程中的表现和作用各不相同.提出了描述织物中各层次透湿孔洞的物理量并给出了相应的计算公式.     

织物湿传导理论与实际的研究第二报:织物湿传导理论方程的研究

研究了织物透湿过程中涉及的水蒸汽在湿空气中的扩散,水平液面上水蒸汽的蒸发,在毛细管中水蒸汽的凝结,毛细管中水蒸汽的蒸发和毛细管中液态水的输送等过程的状态和理论方程.     

飞艇用层压织物类膜材中心撕裂破坏机理模型

中心撕裂破坏是飞艇用层压织物类膜材失效破坏的基本形式之一.基于层压织物类膜材的平纹织物结构特征,建立了具有平面纱线结构的中心切缝撕裂机理模型,该模型应用了"等效纱线"及"应力集中渐变区"两个概念,分别实现模型参数的简化和应力集中区域应力场分布的细化.运用所提机理模型实现了对不同切缝长度时(10~40mm)经纬向层压织物类膜材撕裂破坏行为特征的预测,分析了蒙皮材料撕裂扩展机理,并结合试验结果证实了模型预测的精确性和可行性.由模型分析获得了蒙皮材料在渐变区推移过程中的撕裂承载力及变形特征,发现纱线的失效应变、弹性模量以及编织密度等是影响蒙皮材料撕裂抗力的主要因素.所得结论及研究方法可为层压织物类膜材的强度设计、裂纹止裂分析及结构的安全性评估提供理论参考.     

机织物热阻的理论模型研究

研究了织物传热的宏观、微观机理,认为热流在织物中的传递具有各向异性,热流在纤维中主要沿轴向传递,在织物中主要沿纱线轴向传递.通过对平纹、斜纹、缎纹织物热阻的实例分析,建立了与织物结构参数相关的热阻理论模型.在此模型的基础上,分析了织纹组织、织物厚度和容重对织物热阻的影响规律,丰富了织物热传导理论.     

三维纺织复合材料和铝中冲击应力波传播与能量吸收

比较两种三维纺织结构复合材料(三维针织间隔织物和三维正交机织物复合材料)圆板和铝圆板间 的冲击行为,讨论三维纺织结构复合材料和均质各向同性材料间的冲击损伤机理.用不同冲击速度下复合材料和铝的裁荷位移曲线分析冲击加栽下应力波在材料中的传播,同时与有限元计算结果作对比分析.发现复合材料有纤维束断裂、基体开裂以及复杂的应力波传播现象,而铝只表现出弹塑性变形.     

经编间隔织物压缩性能的实验研究及计算机仿真

目的改善经编间隔织物结构设计粗放化、经验化的现状,为在给定工作应力下的经编间隔织物结构参数设计提供基础。方法从平板压缩和球形压缩试验开始,探讨织物结构参数(如间隔纱细度、面密度、垫纱角度等)对织物压缩性能的影响,给出织物的缓冲特性曲线,并建立了计算机仿真有限元模型。结果仿真计算显示,理论计算结果与试验数据基本吻合。结论该有限元模型可用于经编间隔织物的结构参数设计。     

织物拒水拒油整理工艺探讨

目前常用的拒水剂主要是有机硅化合物和有机氟化合物,但有机氟化合物可同时赋予整理织物拒水、拒油性能,可满足人们对多功能纺织品的需求.本文使用含氟化合物TG-581拒水拒油整理剂对4种织物进行整理.文章探讨了整理剂质量浓度、整理液pH值、烘干温度、焙烘温度、焙烘时间等工艺因素对拒水拒油性能的影响,从而为确定拒水拒油整理最佳工艺条件提供参考.     

傅立叶变换技术在织物和无纺布结构参数测试中的应用

对傅立叶变换在纺织图像滤波、无纺布中纤维取向度检测、以及织物结构参数测量等方面的应用进行了研究和分析,研究的结果表明:傅立叶变换技术是非常有效的.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

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.     

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.     

A computer generator for randomly layered structures

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

An Index mechanism for multi-scale view in spatial databases

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.     

Jane Eyre——A Feminist In The 19th Century

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.     

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-