补饲硫对安哥拉山羊F2代杂种羊无髓毛机械性能的影响研究

用硫酸钠、胱氨酸对安哥拉山羊Ｆ２代杂种羊进行补饲．结果表明：两种硫源对Ｆ２代杂种羊无髓毛的断裂强力、断裂伸长、断裂伸长率及鳞片度等指标均有极显著提高（Ｐ＜０．０１），对断裂强度和逆阻抗系数有显著提高（Ｐ＜０．０５）；补饲胱氨组的屈服点应力明显高于对照组（Ｐ＜０．０５）；两种硫源对其它机械性能指标的影响均不明显（Ｐ＞０．０５）．     

尼玛县绒山羊的生长发育和产绒性能

经测定尼玛县藏山羊的生长发育和产绒性能,研究结果:羔羊初生重公羔为2.07±0.19kg,母羔为1.99±0.15kg, 公羔比母羔重约0.08kg,差异不显著(P>0.05);断奶重公羔为8 34±0.94kg,母羔为8.13±0.98kg,公羔比母羔重0.21kg, 差异极显著(P<0.01);周岁体重公羊为19.22±2.62kg,母羊为15.19±1.85kg;2岁体重公羊为28.11±4.09kg,母羊为 20.36±2.62kg;3岁以上公羊为36.66±5.89kg,母羊为23.31±2.61kg,周岁后体重在公羊与母羊间差异极显著(P<0.01);周 岁、2岁和3岁以上的体尺随年龄的增长而增大;产绒量周岁公羊为187.70±54.55g,母羊为175.61±33.90g,2岁公羊为 209.10±41.99g,母羊为191.10±31.20g,3岁以上公羊为324.00±80.20g,母羊为286.10±60.20g,产绒量在性别间差异极显 著(P<0.01),产绒量随着年龄的增长逐渐增加;绒层高度在年龄间差异不显著(P>0.05);在3岁以后生长发育和产绒性能 均趋于稳定.     

木棉纤维拉伸性能的测试与评价

设计了单纤维强伸性能的新测试方法,测试了4种木棉纤维的拉伸性能,结果发现,木棉纤维拉伸曲线与棉纤维相似,没有明显的屈服点.木棉纤维断裂强力和断裂伸长率在一定范围内均有分布,4种木棉纤维平均断裂强力1.44～1.71 cN,平均断裂伸长率1.83%～4.23%,纤维长度、线密度与木棉纤维的断裂强力明显相关,4种木棉纤维相对断裂强度接近,而断裂伸长率差异较大,木棉纤维初始模量因其品种和产地不同存在一定差异.与棉纤维相比,木棉纤维断裂伸长率低,断裂强度和初始模量与棉纤维相近,但因木棉纤维细软而容易拉断.     

电子辐照苎麻纤维引起结晶度和力学性能的变化

用BF-5直线加速器提供的电子束对苎麻纤维织物进行了0~500kGy范围不同剂量的辐照,使苎麻纤维的结晶度发生变化,采用X射线衍射仪(XRD)对辐照苎麻纤维的结晶度进行测试分析.并用材料万能试验机对辐照苎麻纤维织物的断裂强力、断裂伸长量等力学性能进行测试.研究表明:苎麻纤维的结晶度随辐照剂量增大而明显下降,苎麻纤维织物断裂强力、断裂伸长量均随辐照剂量增大而下降;苎麻纤维织物力学性能下降与电子束辐照降低了纤维结晶度有关.     

美姑县巴普黑山羊血液生化指标测定

本文对凉山州美姑县巴普黑山羊血液中血磷、血钙、胆固醇等10项指标进行了测定。结果表明：母羊血液胆固醇含量显著高于公羊（P〈0．05）,其它9项指标公母羊差异不显著（P〉0．05）。血糖、血磷、血钙、血中氯化物、总胆固醇、GPT均高于国内外山羊测定值的变异范围。     

文胸肩带疲劳表征

采集7种具有代表性的文胸肩带作为试验对象,分别通过拉伸断裂试验、定伸长5次反复拉伸试验,获得肩带试样的断裂功、断裂比功,以及5次反复拉伸弹性回复率、塑性变形率.基于试验定义了弹性回复率衰变量Δε15和塑性变形率积累量ΔG15,以表征肩带疲劳变化过程的缓急,并对其物理意义进行了验证.通过相关分析得出肩带试样的弹性回复率衰变量与断裂比功存在较显著的线性负相关关系,塑性变形率积累量与断裂比功存在一定的负相关关系.     

西藏山羊绒理化性能研究

本研究结果表明:成年公、母西藏山羊绒纤维的自然长度分别为4.55cm、4.23cm;伸直长度分别为5.53cm、5.28cm;细度分别为15.4.μ、16.02μ;强度分别为为4.78g、4.65g;伸度分别为37.82%、40.69%。绒纤维鳞片形状多为环形,鳞片密度为129.25层/mm,鳞片的可见高度为7.76μ。绒纤维含有17种氨基酸,其中以谷氨酸、精氨酸、胱氨酸、丝氨酸等氨基酸含量较高,胱氨酸含量为7.23%。     

混纺比对腈氯纶/棉混纺纱拉伸性能的影响

运用双组分纤维混纺纱简化模型理论,分析混纺比对腈氯纶/棉混纺纱的拉伸性能的影响。通过测试100/0、80/20、60/40、40/60、20/80、0/100六种混纺比的腈氯纶/棉混纺纱的断裂强力、断裂伸长率和断裂功,采用Origin7.5软件分析混纺比与腈氯纶/棉混纺纱拉伸性能的关系曲线。结果表明：腈氯纶的质量分数为65%左右时,混纺纱的断裂强力和断裂伸长出现最低值,在生产中应尽量避免选用该混纺比。     

甘油对卡拉胶纤维性能影响分析

利用甘油对卡拉胶进行浸泡处理,纤维变的圆润光滑、柔软。处理后纤维韧性提高,不容易折断,耐磨,耐疲劳性能提高,弹性提高为原来的3.35倍,但是纤维的断裂强力有所降低。     

接缝角度和针距对涤棉面料接缝强力指标的影响

选择了3种具有代表性的涤棉面料,采用二次通用旋转组合法设计实验方案,缝制了不同方案下的平缝试样,建立了针距、接缝角度与接缝强力指标的回归方程,分析了各因素对涤棉面料接缝强力指标的影响．实验结果表明：针距越小,面料的接缝断裂强力越大;接缝断裂强力在接缝角度为0°、45°、90°时较大;接缝断裂伸长率和断裂功均在接缝角度为45°左右时出现高峰;平纹的接缝断裂强力比斜纹稍微大点;面料的平方米克重越大,接缝断裂强力也越大．     

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.     

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.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with