STUDY ON MECHANISM OF SUPERSENSITIZATION OF SOME ALLOPOLAR TRINUCLEAR CYANINE DYES

ＳＴＵＤＹＯＮＭＥＣＨＡＮＩＳＭＯＦＳＵＰＥＲＳＥＮＳＩＴＩＺＡＴＩＯＮＯＦＳＯＭＥＡＬＬＯＰＯＬＡＲＴＲＩＮＵＣＬＥＡＲＣＹＡＮＩＮＥＤＹＥＳＺＨＡＮＧＪＩＮ－ＬＯＮＧ；ＣＨＥＮＬＩＡＮ－ＳＨＥＮ；ＺＨＵＺＨＥＮＧ－ＨＵＡ（ＲｅｓｅａｒｃｈＩｎｓｔ...     

固体超强酸ZrO_2/SO_4~=和Fe_2/O_3/SO_4~=催化苯乙烯烷基化甲苯反应初探

固体超强酸ＺｒＯ２／ＳＯ＝４和Ｆｅ２／Ｏ３／ＳＯ＝４催化苯乙烯烷基化甲苯反应初探ＣＡＴＡＬＹＩＣＡＬＫＹＬＡＴＩＯＮＲＥＡＣＴＩＯＮＯＦＴＯＬＵＥＮＥＡＮＤＳＴＹＲＥＮＥＢＹＵＳＩＮＧＳＯＬＩＤＳＵＰＥＲＡＣＩＤＳＺｒＯ２／ＳＯ４＝ＡＮＤＦｅ２／Ｏ／...     

铝合金化学镀镍工艺

铝合金化学镀镍工艺郭志刚（襄樊市建昌机器厂表面处理分厂，４４１００２）ＥＬＥＣＴＲＯＬＥＳＳＮＩＣＫＥＬＯＮＡＬＵＭＩＮＩＵＭＡＬＬＯＹ￥Ａｂｓｔｒａｃｔ：Ｎｉ－Ｐｐｌａｔｉｎｇｗｉｔｈｇｏｏｄｃｏｒｒｏｓｉｏｎ－ｒｅｓｉｓｔａｎｃｅｉｓｏｂｔａｉｎ...     

1—2折流换热器流体温度沿程变化及其LMTD的计算

１－２折流换热器流体温度沿程变化及其ＬＭＴＤ的计算梁日忠ＴＨＥＶＡＲＩＡＴＩＯＮＯＦＦＬＵＩＤＴＥＭＰＥＲＡＴＵＲＥＡＬＯＮＧＳＩＤＰＡＳＳＡＮＤＴＨＥＣＡＬＵＡＴＩＯＮＯＦＬＭＴＤＩＮ１－２ＢＡＦＦＬＥＨＥＡＴＥＸＣＨＡＮＧＥＲ１前言换热器设计中，...     

Y－TYPE ZEOLITES AS MICRO－REACTORS FOR PHOTOCHEMICAL PREPARATION OF LARGE－RING COMPOUNDS

Ｙ－ＴＹＰＥＺＥＯＬＩＴＥＳＡＳＭＩＣＲＯ－ＲＥＡＣＴＯＲＳＦＯＲＰＨＯＴＯＣＨＥＭＩＣＡＬＰＲＥＰＡＲＡＴＩＯＮＯＦＬＡＲＧＥ－ＲＩＮＧＣＯＭＰＯＵＮＤＳ￥ＴＯＮＧＺｈｅｎｈｅ；（ＴＵＮＧＣｈｅｎｈｏ）；ＷＵＬｉｚｈｕ（ＩｎｓｔｉｔｕｔｅｏｆＰｈｏ...     

成膜助剂在水性乳胶涂料中的作用及其选择方法

成膜助剂在水性乳胶涂料中的作用及其选择方法ＴａｎＭｅｎｇＫｗａｎｇ（新加坡ＥｓａｔｍａｎＣｈｅｍｉｃａｌ亚太技术中心）ＴＨＥＲＯＬＥＡＮＤＳＥＬＥＣＴＩＯＮＯＦＣＯＡＬＥＳＣＩＮＧＡＩＤＳＩＮＡＱＵＥＯＵＳＬＡＴＥＸＰＡＩＮＴ￥ＴａｎＭｅｎｇｋｗａｎ...     

JOURNAL OF THE CHINESE CERAMIC SOCIETY TOTAL CONTENTS Vol.2 9,No .1～ 6 ,2 0 0 1

ＳｕｂｊｅｃｔＡｕｔｈｏｒ　　　　 [Ｎｏ .](Ｐａｇｅ)ＣｅｒａｍｉｃＳｔｕｄｉｅｓｏｎＰｈａｓｅＴｒａｎｓｆｏｒｍａｔｉｏｎｉｎｔｈｅ 3Ｙ -ＴＺＰ/Ａｌ2 Ｏ3 ＣｏｍｐｏｓｉｔｅＰｏｗｄｅｒｓＹｉｎＢａｎｇｙａｏ ,ＷａｎｇＬｉｎｇｓｅｎ [1](1)…………………………………………………………………………………………Ｒｅｓｉｓｔａｎｃｅ -ＣｕｒｖｅＢｅｈａｖｉｏｒｆｏｒＳｉ3 Ｎ4 -ＴｉＮ/ＢＮＬａｍｉｎａｔｅｄＣｏｍｐｏｓｉｔｅｓａｎｄＴｈｅｉｒＴｏｕｇｈｎｅｓｓＭｅｃｈａｎｉｓｍＣｏｎｓｉｄｅｒａｔｉｏｎ…     

螺旋霉素的油／水界面循环伏安法测定

螺旋霉素的油／水界面循环伏安法测定韩玉洁，杨文友，徐忠ＣＹＣＬＩＣＶＯＬＴＡＭＥＴＲＹＤＥＴＥＲＭＩＮＡＴＩＯＮＯＦＳＰＡＮＭＹＣＩＮＡＴＷＡＴＥＲＬＯＩＬＩＮＴＥＲＦＡＣＥＳ１前言油／水界面循环伏安法是近年来发展起来的一种新的电化学分析方法。并且已...     

SiC—Al2O3基复相陶瓷的N2—HIP研究

通过对热压ＳｉＣ－Ａｌ２Ｏ３复合材料进行了Ｎ２－ＨＩＰ后处理，制备得到Ｓｉ３Ｎ４－ＡｌＮ＝ＳｉＣ－Ａｌ２Ｏ３梯度材料，经Ｎ２－ＨＩＰ处理后，材料抗弯强度提高３５％－９５％，并得到经强度达１０３０ＭＰａ的ＳｉｅＮ４－ＡｌＮ／ＳｉＣｐ－ＳｉＣＷ－Ａｌ２Ｏ３复合材料。     

CHEMICAL SENSITIZATION OF TABULAR－GRAIN EMUL－SIONS IN THE PRESENCE OF SENSITIZING DYE

ＣＨＥＭＩＣＡＬＳＥＮＳＩＴＩＺＡＴＩＯＮＯＦＴＡＢＵＬＡＲ－ＧＲＡＩＮＥＭＵＬ－ＳＩＯＮＳＩＮＴＨＥＰＲＥＳＥＮＣＥＯＦＳＥＮＳＩＴＩＺＩＮＧＤＹＥ￥ＣＨＥＭＩＣＡＬＳＥＮＳＩＴＩＺＡＴＩＯＮＯＦＴＡＢＵＬＡＲ－ＧＲＡＩＮＥＭＵＬ－ＳＩＯＮＳＩＮＴ...     

非金属密封垫片应力场的数值模拟

为研究聚四氟乙烯密封垫片的应力分布规律,根据有限元理论,建立了管法兰连接有限元模型。研究了垫片在预紧状态和工作状态下的Von Mises应力和接触应力分布,分析了管道内流体压力、螺栓预紧力和垫片材料弹性模量对其应力值和应力分布的影响。结果发现:垫片在工作状态下的Von Mises应力大于其在预紧状态;流体压力越大,垫片和Von Mises应力越大,但是其有效接触宽度越小;螺栓的预紧力越大,垫片的Von Mises应力和接触应力越大;垫片材料的弹性模量值对垫片接触应力值的影响较小。     

基于Ansys的橡胶O形密封圈的密封性能有限元分析

利用有限元分析软件Ansys,建立了橡胶O形圈及其边界的有限元模型,分析计算了不同的O形密封圈径向间隙以及不同的油压下对密封面最大接触压力和Von Mises应力的影响,以及它们之间的相互关系,为O型密封圈的合理安装和使用提供了理论依据。     

基于Abaqus的O形橡胶密封圈热应力分析

建立O形橡胶密封圈平面轴对称有限元模型,采用Abaqus有限元软件的Mooney-Rivlin模型,分析O形橡胶密封圈加压后的Von Mises应力分布及温度对应力的影响。结果表明,O形橡胶密封圈应力与温度呈一次线性关系,温度变化对O形橡胶密封圈密封性能有一定影响。     

单搭接接头峰值应力数值模拟的正交法分析

运用正交试验法研究了几个主要力学和几何参数如泊松比,弹性模量和被粘物厚对单搭接接头Von Mises等效应力的影响。有限元分析结果的极差分析、方差分析和最优方案的工程平均等结果表明:被粘物厚对单搭接接头Von Mises等效应力影响最大,弹性模量次之,泊松比影响程度最小。分析可知:高的泊松比、低弹性模量和被粘物厚的增大会使得Von Mises等效应力值显著降低。     

Experimental and Numerical Investigations on Softening Behavior of POM Under Cyclic Strain-Controlled Loading

In this paper, cyclic stress-strain behavior of POM was studied. Fatigue tests were carried out under symmetric uniaxial strain-controlled mode. In this case of loading conditions the material exhibited cyclic softening and with the increase of strain amplitude the total number of cycles to failure reduced dramatically. Additional fatigue tests were further performed under non-symmetrical uniaxial cyclic loading where specimens exhibited relaxation behavior and mean stress reached a zero value in continuous cycles. Experimental tests were performed using an INSTRON 8802 servo-hydraulic machine and the results obtained from the experiments were compared with numerical results. The numerical analysis was carried out by ABAQUS software using the following advanced plasticity models based on Von Mises criterion: isotropic hardening, linear kinematic hardening, and non-linear isotropic/kinematic hardening.     

压缩工艺参数对注射压缩成型聚碳酸酯透明件残余应力的影响

基于注射压缩成型技术,以聚碳酸酯为原材料,采用不同的压缩工艺参数制备出聚碳酸酯透明件。结合成型过程中的模具型腔压力测试,采用定性（应力偏光法）和定量（小孔法）两种方法,对成型透明件的残余应力进行了测试,分析了压缩启动位置、压缩距离、熔体温度及模具温度等压缩过程的核心工艺参数对聚碳酸酯透明件残余应力的影响规律。结果表明,随着压缩启动位置的推迟或压缩距离的增大,型腔压力上升,使得制品的残余应力降低,当压缩启动位置从10 %延迟至70 %时,或者压缩距离从0.5 mm增大至2.0 mm,透明件测试点的Von Mises等效残余应力平均下降幅度达到82.0 %和64.7 %;随着熔体温度的升高或模具温度的升高,型腔压力变化并不明显,但制品的残余应力降低,当熔体温度从290 ℃升至320 ℃,或者模具温度从80 ℃升至120 ℃,透明件测试点的Von Mises等效残余应力平均下降幅度达到56.2 %和77.0 %。     

Robustness of stein's two stage procedure

We go back to the well known Stein two stage confidence interval and find global upper bounds on the ratio of the expected sample size for appropriate nonnormal data and normal data. The first stage sample size is taken to be 2 and the nonnormal distributions considered are the bounded uniform, t with 3 and 5 degree of freedom, the Double Exponential, the Logistic, and the Von Mises extreme value density. Notice the last distribution is asymmetric.     

Power consumption in the compacting process of polymer particulate solids in a vane extruder

An innovational vane extruder made polymeric materials endure an elongation stress that was much larger than the shearing stress in the extrusion process. The operating principle of the vane extruder was completely different than that of conventional screw extruders. As the first stage of polymer processing in the vane extruder, the process of solids conveying was composed of feeding, compacting, and discharging. Most of the energy was consumed in the compacting process of polymer particulate solids in this stage. A mathematical model was developed to analyze the power consumption in the process. The model showed that the power consumption was mainly influenced by the structural parameters of the vane extruder, including the rotor diameter, eccentricity, and axial width of the vane unit. The analysis indicated that more energy was used to generate pressure in the vane extruder than in a screw extruder. The theoretical model was verified by the experimental results. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

载重子午线轮胎带束层部分的动态模拟

以12.00R20全钢载重子午线轮胎为研究对象,基于Abaqus软件和组合模型技术建立带复杂胎面花纹的轮胎全局模型,然后基于子模型技术建立带束层部分的三维精细网格模型进行有限元分析。结果表明:静负荷工况下,由全局模型与子模型计算得到的应力场比较一致,且Mises应力最大值均出现在胎体帘布层。自由滚动工况下,两层带束层帘线Mises应力分布非常不均匀,但基本关于中分面对称;第2带束层Mises应力高于第1带束层,且各带束层在胎冠部位Mises应力整体高于胎侧部位;胎冠部位两层带束层Mises应力分布变化不大,胎肩部位Mises应力增大,胎侧部位Mises应力减小;第1和第2带束层帘线Mises应力分布关于中分面的对称情况刚好相反。     

Finite Element Analysis of Stress Field Concentration Near the Edge of an Electrode

We study stress fields near the edge of an electrode by finite element method. Von Mises Stress near an electrode edge is calculated. The effect of the curvature of the electrode is examined. Stress concentration is observed and a technique for its reduction is suggested.