LIMIT CYCLES AND BIFURCATION CURVES FOR THE QUADRATIC DIFFERENTIAL SYSTEM(III)_(m=0)HAVING THREE ANTI-SADDLES(II)

ＬＩＭＩＴＣＹＣＬＥＳＡＮＤＢＩＦＵＲＣＡＴＩＯＮＣＵＲＶＥＳＦＯＲＴＨＥＱＵＡＤＲＡＴＩＣＤＩＦＦＥＲＥＮＴＩＡＬＳＹＳＴＥＭ（ＩＩ）ｍ＝０ＨＡＶＩＮＧＴＨＲＥＥＡＮＴＩＳＡＤＤＬＥＳ（Ｉ）ＹＥＹＡＮＱＩＡＮＡｂｓｔｒａｃｔＡｓａｃｏｎｔｉ...     

TiO2 Nanoparticles Produced by Electric-Discharge-Nanofluid-Process as Photoelectrode of DSSC

利用自制TiO₂纳米粒子研究敏化染敏太阳能电池. 使用自制的旋转涂布加热平台装置将产出的TiO₂粒子均匀的涂布在ITO导电玻璃上形成薄膜,浸泡于N-719 染料中12小时以上作为DSSCs的光电极 元件,最后完成染料敏化太阳能电池的系统组装并进行光电转换效率测量. 实验结果表明,放电过程产出的TiO₂纳米粒子具有锐钛矿晶相,粒径尺寸可控制在20～70 nm,粒子表面电位约为-30 mV,是稳定的纳米悬浮夜. 添加0.5 mL 的Triton X-100在导电玻璃表面上,利用的旋转涂布加热到22 oC可以制得厚度均匀缜密的薄膜结构,不但粒子不受到热处理效应与介面活性剂的影响而发生晶相改变,并且薄膜也有良好的染料吸附效果. 较厚二氧化钛薄膜的光电极会提升敏化染敏太阳能电池的效率. 实验结果得知,以15 μm的二氧化钛薄膜组装DSSCs测得最高效率2.15%,但是当薄膜厚度超过15 μm 则会导致开路电压与充填因子逐渐下降,光电转换效率变差.     

Synthesis and Crystal Structure of α-( N-Protected a mino)β- lactam Derivative of 1 ,5-Benzothiazepine

１　ＩＮＴＲＯＤＵＣＴＩＯＮＲｅｃｅｎｔｌｙ,ａｎｕｍｂｅｒｏｆｄｅｒｉｖａｔｉｖｅｓｏｆｂｅｎｚｏｔｈｉａｚｅｐｉｎｅｈａｖｅｂｅｅｎｐｒｅｐａｒｅｄａｎｄｓｔｕｄｉｅｄｆｏｒｔｈｅｉｒｐｈａｒｍａｃｏｌｏｇｉｃａｌａｃｔｉｖｉｔｉｅｓ〔１５〕．Ｉｎｏｕｒｐｒｅｖｉｏｕｓｗｏｒｋ,ｗｅｈａｖｅｉｎｃｏｒｐｏｒａｔｅｄｔｈｅβｌａｃｔａｍｒｉｎｇｉｎｔｏ１,５ｂｅｎｚｏｔｈｉａｚｅｐｉｎｅｂｙｒｅａｃｔｉｏｎｏｆ１,５ｂｅｎｚｏｔｈｉａｚｅｐｉｎｅｗｉｔｈｓｏｍｅａｃｙｌｃｈｌｏｒｉｄ…     

Synthesis and Crystal Structure of Dicesium trans Dicarbonatotetraaquomagnesium, Cs_2[Mg(CO_3)_2(H_2O)_4]

ＩｎｔｒｏｄｕｃｔｉｏｎＰｒｅｖｉｏｕｓｌｙ,ｗｅｒｅｐｏｒｔｅｄｔｈｅｃｒｙｓｔａｌｓｔｒｕｃｔｕｒｅｏｆＫ２［Ｎｉ（ＣＯ３）２（Ｈ２Ｏ）４］［１］,ｗｈｉｃｈｃｒｙｓｔａｌｌｉｚｅｄｉｎｔｈｅｂａｙｌｉｓｓｉｔｅｔｙｐｅｓｔｒｕｃｔｕｒｅａｎｄｗａｓｆｏｕｎｄｔｏｂｅｉｓｏｓｔｒｕｃｔｕｒａｌｗｉｔｈＫ２［Ｃｏ（ＣＯ３）２（Ｈ２Ｏ）４］［２］ａｎｄＫ２Ｍｇ（ＣＯ３）２·４Ｈ２Ｏ［３］．Ｉｎｏｒｄｅｒｔｏｓｙｓｔｅｍａｔｉｃａｌｌｙｉｎｖｅｓｔｉｇａｔｅｔｈｅｏｃｃｕｒｒｅｎｃｅｏｆｔｈｅｃｏ…     

三甲川菁染料敏化TiO2纳米 结构电极的光电化学

The photoelectrochemical behaviors of the TiO₂ nanostructured porous film sensitized by cyanine dye were investigated in this paper.The results showed that the excitaed state level matched the conduction band edge of TiO₂ nanoparticle.Therefore the sensitization of the dye can increase the photocurrent intensity of the TiO₂ nanostructured electrode obviously and results in a red-shift of optical absorption from the ultra-violet region to the visible.As a result,the light-to-electricity conversion efficiency was improved evidently,the maximum value of IPCE has reached 12.1%.     

A Fluorescence Optical Fiber Sensor for Amrinon Using a New Oxazole Compound

ＩｎｔｒｏｄｕｃｔｉｏｎＡｍｒｉｎｏｎ,ａｓｙｎｔｈｅｔｉｃｂｉｐｙｒｉｄｉｎｅｄｅｒｉｖａｔｉｖｅ,ｎｏｎｇｌｙｃｏｓｉｄｅａｎｄｎｏｎｃａｔｅｃｈｏｌａｍｉｎｅｃａｒ－ｄｉｏｔｏｎｉｃｓｔｉｍｕｌａｎｔ,ｉｓｃｕｒｒｅｎｔｌｙｕｓｅｄｉｎｔｈｅｔｒｅａｔｍｅｎｔｏｆｔｈｅｈｅａｒｔｆａｉｌｕｒｅａｎｄｆｏｒｃａｒｄｉｏｖａｓｃｕ－ｌａｒｓｕｐｐｏｒｔｉｎｐｅｄｉａｔｒｉｃｐａｔｉｅｎｔｓ．Ｉｔｐｏｓｓｅｓｓｅｓｐｏｔｅｎｔｃａｒｄｉａｃａｎｄｂｌｏｏｄｖｅｓｓｅｌｓｐｒｅａｄｉｎｇｅｆ－ｆｅ…     

The Elastic Continuum Limit of the Tight Binding Model

The authors consider the simplest quantum mechanics model of solids,the tight binding model,and prove that in the continuum limit,the energy of tight binding model converges to that of the continuum elasticity model obtained using Cauchy-Born rule.The technique in this paper is based mainly on spectral perturbation theory for large matrices.