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1.
通过系统测试分析,得到了羊毛衫最常用的纬平针、1+1罗纹、满针罗纹、罗纹空气层、畦编五类组织的横密、纵密、密度对比系数和横拉密值与线圈长度的线性相关回归方程式.这些方程式可以有效地帮助羊毛衫企业解决羊毛衫织物毛坯和成品密度控制这一难题.  相似文献   

2.
选取舒适性、坚牢度和外观保持性等指标,采用模糊数学综合评判的方法对珍珠纤维针织面料的服用性能进行综合分析与评价.得出其综合服用性能的评价结果由好到差依次为:罗纹半空气层组织>满针罗纹组织>半畦编组织>罗纹空气层组织>畦编组织>1+1罗纹组织>纬平针.  相似文献   

3.
从理论和实验两方面分析探讨羊毛衫罗纹领的工艺设计,并提出用领罗纹织物横向宽度与大身挖领周长之比值K来设计罗纹领的排针数。  相似文献   

4.
为探讨不同组织结构的纬编针织复合材料的力学性能,以芳纶和UHMWPE纤维为原料,采用硅烷偶联剂KH-550对芳纶和UHMWPE纤维进行表面改性处理,在横机上编织满针罗纹,圆筒形,罗纹空气层三种不同组织的纬编针织增强体.采用模压成型工艺将增强体与环氧乙烯基酯树脂进行加工,制得三种纬编针织结构增强复合材料,对三种复合材料的经纬向拉伸、压缩、弯曲和层间剪切强度性能进行测试比较.结果表明,经硅烷偶联剂KH-550处理的纤维针织增强体各项力学性能均有所提升,满针罗纹纬编针织复合材料的经向拉伸、经纬向压缩、经纬向弯曲和经纬向层间剪切强度均优于其他组织,而罗纹空气层纬编针织复合材料的纬向拉伸强度达到最大,圆筒形纬编针织复合材料的各项性能最低.  相似文献   

5.
玻璃纤维丙纶混并纱纬编针织复合材料拉伸性能的研究   总被引:2,自引:0,他引:2  
在手摇横机上编织了玻璃纤维丙纶平针织物和罗纹织物预制件,将预制件通过热压成型的方法制得复合材料,并且在材料试验机上测试了复合材料的拉伸性能。结果表明平针和罗纹织物复合材料的拉伸性能存在着差异,同一种复合材料在纵横向的拉伸性能也存在着不同。分析了影响拉伸强度和弹性模量的影响因素,为纬编针织物复合材料的设计和生产提供了依据。  相似文献   

6.
本文阐述了在双罗纹针织机上编织罗纹针织物的方法,并对所编织的三种罗纹针织物的特性进行比较,提出2 2罗纹不仅在双罗纹针织机上编织容易,而且具有优良的物理性能.  相似文献   

7.
将含有竹纤维、Modal纤维和Tencel纤维混纺成分的牛奶蛋白纤雏纱线,分别织造纬平针、1+1罗纹和双罗纹3种组织的织物,并且每种组织都有3种松紧程度.对试样的抗起毛起球性能进行测试,从而分析不同因素对牛奶蛋白纤雏混纺针织物抗起毛起球性能的影响.结果表明:不同的混纺纤维对牛奶蛋白纤维混纺针织物的抗起毛起球性能的影响比较复杂,这是纤维形态、纤维性能和织物紧密程度三者共同作用的结果.3种组织中,双罗纹组织的抗起毛起球性能最优;织物的密度与抗起毛起球性能紧密相关.  相似文献   

8.
分析了1+1,2+1,2+2和2+3四种罗纹针织物的结构和变形特征。报导了四种纯毛罗纹织物环状、横向定伸长重复拉伸试验结果。在分析试验结果基础上得出2+2和2+3罗纹比1+1和2+1罗纹具有更好的延伸性和弹性,而且随循环数增加,2+1、1+1罗纹的拉伸功、拉伸力和弹性比2+2、2+3罗纹下降得更快,使服装更早出现尺寸和形态的不稳定。本文还讨论了线圈长度对罗纹针织物延伸性和弹性的影响。  相似文献   

9.
基于Labview的针织物疵点检测   总被引:1,自引:1,他引:0  
介绍一种基于Labview的针织物疵点检测系统与方法.其采用Labview软件并结合Matlab编程,首先对采集的针织物图像进行中值滤波和二值化处理,接着采用db小波分解图像,最后对分解后的经向和纬向纹理子图像分别提取特征值,由此检测和识别疵点.实验结果表明此方法可以有效地检测平针、罗纹和双罗纹针织物的常见疵点.  相似文献   

10.
采用合成的针铁矿为催化剂与H2O2构成非均相Fenton试剂,开展对盐酸四环素(TC)的氧化分解特征及其动力学研究.考察pH、H2O2 浓度、催化剂投加量、TC初始浓度、温度对TC氧化分解过程的影响.研究结果表明,在优化条件下,针铁矿催化对TC的Fenton氧化分解效果明显,240 min后氧化分解率达到97.2%.而且,针铁矿氧化分解TC的反应仍主要是通过?OH作用, 因为加入叔丁醇自由基捕获剂后,TC的氧化分解率明显降低.此外,动力学模型拟合结果表明,针铁矿表面催化氧化分解TC是符合准一级动力学反应(R2>0.97),其表观活化能为Ea=31.86 kJ/mol.可见,该氧化分解反应表观活化能相对比较低,说明该反应比较容易进行,温度升高也有助于提高反应速率.  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.
王慧 《科技信息》2008,(10):240-240
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.  相似文献   

14.
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.  相似文献   

15.
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   

16.
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   

17.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

18.
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   

19.
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   

20.
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  相似文献   

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