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.     

PTT经编弹力泳装面料弹性的研究

为了解新型聚酯纤维PTT(聚对苯二甲酸丙二醇酯)经编弹力泳装面料的弹性,用PTT纤维织制的经编弹力泳装面料,与锦纶(PA)和涤纶(PET)织制的经编弹力泳装面料进行对比研究.实测了它们15N和5次及25N和9次定负荷的拉伸性能,比较了它们的弹性回复率、塑性变形率和拉伸弹性伸长率;为进一步寻找3种面料的弹性回复率变化规律,列出了它们弹性回复率的回归方程式.结果显示,PTT经编弹力泳装面料断裂强力较小、伸长率较大,具有优异的弹力回复性,是制作泳装的理想面料.     

PTT纱线的弹性对无缝内衣织物服用性能的影响

为了了解聚对苯二甲酸丙二醇酯(PTT)及PTT/聚对苯二甲酸乙二醇酯(PET)纱线对织物弹性性能的影响,选择PTT纱线及PTT/PET双组分纱与无缝内衣领域常用的锦纶和两种锦纶/氨纶包芯纱共6种纱线,对比其在沸水处理前后的强力-伸长特征以及定伸长弹性特征,并对比这6种纱线组合编织成的11种无缝内衣织物的弹性回复率.采用显著性检验的数学方法证明含有PTT的双组分纱线的弹性回复率与锦纶/氨纶包芯纱相似,PTT纱线作为无缝内衣织物的底纱较适宜,用其编织的无缝内衣产品的保形性及耐疲劳性优良.     

一体化编织型血管覆膜支架的压缩性能

采用新型编织技术制备了螺旋平行分布和交叉分布的4种不同结构的一体化血管覆膜支架,研究支架不同结构与其平面压缩性能的关系,考察不同压缩测试条件(压缩和回复速率以及压缩停滞时间)对支架的径向压缩强力、应力松弛率和弹性回复率的影响,综合评价其压缩性能.结果表明:小节距同向螺旋平行分布血管覆膜支架(A2)具有压缩强力较高、应力松弛率最小、弹性回复率高,故其压缩性能最好;随着压缩停滞时间的延长,大节距同向螺旋平行分布血管覆膜支架(A1)和交叉分布血管覆膜支架(B1和B2)的应力松弛率明显增加,且弹性回复率降低.     

文胸肩带的选择依据分析

针对内衣企业在文胸肩带配伍时缺乏有效的选择依据,没有形成规范的、切实可行的文胸肩带选取方法的问题,以文胸肩带舒适性理论研究为基础,提取了影响文胸压力舒适性的因素,并实施了文胸肩带拉伸强力实验,采用YG(B)026H型电子织物强力机测试了6款规格的18个肩带样本,并对实验数据进行了SPSS分析.研究表明,在相同开度的条件下,肩带模量和宽度的比值(M/W)、模量拉伸率曲线曲率是选用文胸肩带的重要指标,其中M/W的数值范围应在0.04～0.05较为合适.     

针织调整型束裤拉伸弹性与服装压关系

选择8种氨纶高弹经编针织面料,按调整型束裤标准款式以5档号型制作调整型束裤40条,进行调整型束裤穿着服装压试验及面料的拉伸弹性试验.经过分析得出与臀腹部特征部位服装压相关关系显著的面料弹性指标,包括单次及5次拉伸弹性回复率、横向断裂强力、横向断裂功等,及其与服装压的定量关系.讨论了束裤臀腹部服装压与宽裕率、面料拉伸力的相关关系,得出穿着舒适美体的服装压对应面料拉伸伸长率及拉伸力值,对调整型束裤设计生产中的面料拉伸弹性选择有一定的参考意义.     

PTT等弹性纤维的弹性回复性能比较

实测了PTT、PBT的DTY长丝与PA66的高弹丝、氨纶包芯纱的应力—应变曲线和定伸长10％、…30％条件下的急、缓弹性回复率。通过比较分析发现，PTT长丝的模量最低、弹性回复率最高、急弹性回复性能最好；而PA66高弹丝的模量大于PTT和PBT，弹性回复率小于后二者；PBT长丝的模量和弹性回复性能都在PTT和PA66之间，缓弹性回复性能最好；氨纶的突出特点是伸长率高，但氨纶包芯纱的弹性回复率低于PTT、PBT、PA66长丝。     

不同结构竹浆纱线的应力松弛性能研究

以2个Maxwell并联的四元件模型为基础,利用波尔兹曼叠加原理建立纱线应力松弛变化过程的理论方程,并分别对竹浆紧密纺、赛络纺和喷气涡流纺(MVS)纱线进行应力松弛实验.基于应力松弛理论模型,利用非线性回归拟合法求得纱线应力松弛的回归方程,分析了3种不同结构竹浆纱线的应力松弛机制.实验结果表明,理论值与实测值具有良好的相关性,所用模型可以预测不同结构竹浆纱线的松弛性能.在消耗各纱线断裂伸长30%形变的情况下,竹浆紧密纱应力松弛现象最严重,赛络纱次之,喷气涡流纱最小.     

PTT/PET双组分长丝织物弹性性能测试与分析

为了了解PTT(聚对苯二甲酸丙二醇酯)/PET(聚对苯二甲酸乙二酯)双组分长丝织物的弹性性能,以及不同结构参数对织物弹性的影响,在33种织物试样基础上,测试分析了PTT/PET双组分长丝织物的折皱弹性及定负荷下弹性回复率.结果发现,PTT/PET双组分长丝织物具有优良的折皱回复性能,且折皱弹性与织物组织明显相关,相关系数大于0.50;随着PTT/PET双组分长丝捻度增加,织物经向折皱回复角呈现先变大后变小的规律,纬向折皱回复角因织物组织不同而存在一定差异;PTT/PET双组分长丝织物具有优良的弹性回复性,在定负荷25 N的5次循环拉伸回复条件下,所有测试织物弹性回复率达到96%以上.     

疝修复用经编聚丙烯补片的疲劳性能

聚丙烯(PP)是一种广泛应用于疝修复手术中的补片材料,临床发现补片破裂导致疝复发的案例.通过对国产PP补片分别进行10%,20%,25%的定伸长率反复拉伸测试和20,30,40N的定负荷反复拉伸测试,研究其疲劳性能,并比较补片的弹性回复率、塑性变形率和疲劳后强度的变化.结果表明随着补片试样的伸长率和负荷的增加,弹性回复性逐渐变差,断裂强度损失增大,其横、纵向的疲劳性能不同.因此建议补片在临床使用时,针对不同病患特征,考虑横、纵向放置的方向性.     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

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。     

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.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

正~~     

Achieving Unusual States of Matter Under High Pressure

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