HIGH ACCURACY FINITE VOLUME ELEMENT METHOD FOR TWO-POINT BOUNDARY VALUE PROBLEM OF SECOND ORDER ORDINARY DIFFERENTIAL EQUATIONS

1　ＩｎｔｒｏｄｕｃｔｉｏｎＦｉｎｉｔｅｖｏｌｕｍｅｅｌｅｍｅｎｔｍｅｔｈｏｄｏｒＦＶＥＭｕｓｅｓａｖｏｌｕｍｅｉｎｔｅｇｒａｌｆｏｒｍｕｌａｔｉｏｎｏｆｔｈｅｄｉｆ ｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎｗｉｔｈａｆｉｎｉｔｅｐａｒｔｉｔｉｏｎｉｎｇｓｅｔｏｆｖｏｌｕｍｅｔｏｄｉｓｃｒｅｔｉｚｅｔｈｅｅｑｕａｔｉｏｎ ,ｔｈｅｎｒｅ ｓｔｒｉｃｔｓｔｈｅａｄｍｉｓｓｉｂｌｅｆｕｎｃｔｉｏｎｓｔｏａｌｉｎｅａｒｆｉｎｉｔｅｅｌｅｍｅｎｔｓｐａｃｅｔｏｄｉｓｃｒｅｔｉｚｅｔｈｅｓｏｌｕｔｉｏｎ ([1 -4 ] ) .…     

Oxidative Treatment of Some Reactive Dyes by Fenton Reagent

Nine kinds of reactive dye solutions: Reactive K-2RL, H-E2R, X-6B1Y, HE-4G, X-3B, K-2R,H-E7B, X-4RN and S-F3B were treated by usingFenton reagent. While the concentration of dye is 400mg/L, the FeSO_4 dosage 100-180 mg/L, H_2O_2 240～540 mg/L, that is the stoichiometric numbers of Fe~(2+)and H_2O_2. are between 1: 9～1: 12, pH=3, reaction     

Switched Capacitor Network Analysis by Means of TCM

The totally coded method (TCM) reveals the same objective law, which governs the gain calculating for signal flow graph as Mason formula does. This algorithm is carried out merely in the domain of code operation. Based on pure code algorithm, it is more efficient because figure searching is no longer necessary. The code-series (CS), which are organized from node association table, have the holoinformation nature, so that both the content and the sign of each gain-term can be determined via the coded method. The principle of this method is obvious and it is suited for computer programming. The capability of the computeraided analysis for Switched Capacitor (SCN) can be enhanced.     

PM晶体声光混合型光学双稳态原理设计及频率反馈网络系统研究

本文简介PbMoO_3混合型光学双稳态的原理设计及其反馈网络系统的装置。通过实验及调节,测试了该器件的衍射曲线,反馈曲线以及光学双稳滞后回线。实践证明:PbMoO_3声光晶体具有良好的光学双稳特性,可以作为多通道开关,适用于波导技术。     

光泽黄颡鱼胚胎发育的研究

光泽黄颡鱼的成熟卵直径约1.57mm，激素催产获得成功，受精卵圆形、橙黄色，遇水膨胀，直径为2．01mm。水温在22－25℃时，胚胎孵化需要52.5h。讨论并比较了该鱼和其它鱼类胚胎发育的特点。     

退火温度对25Mn-3Si-3Al-TWIP钢组织和力学性能的影响

研究了不同退火温度对25Mn-3Si-3Al-TWIP钢组织和力学性能的影响.结果表明经1000℃退火后,此钢种可达到640MPa左右的抗拉强度和255MPa左右的屈服强度以及82%以上的延伸率,具有较好的综合力学性能.其室温组织为单相奥氏体基体的退火孪晶,通过TEM观察内部为大量的层错和孪晶共存结构.在随后的拉伸变形过程中产生大量形变孪晶,发生了TWIP效应——孪晶诱发塑性效应,使钢板具有优良的力学性能.     

Differential Capillary Effect Model of Fabric and Its Application

The concept of the differential capillary effect was presented by foreign scholars several years ago, and the principle was used to design sportswear fabrics with good wet permeability and good drying functions for famous sports teams. Because the differential capillary effect model was not established in theory, it was impossible to fulfill the best functions. In this paper, by setting up the differential capillary effect of fabric, the factors to influence wet permeability and drying functions of the model is discussed in theory, and the means to optimize the design of the fabric is presented and proven practically by the experiment. The optimum fabric with good permeability and good drying functions can be designed using the model at last.     

脉冲激光离子源飞行时间质谱计的设计与研制

目前国内外的飞行时间质谱计，大多采用双电场加速的方式改善其质谱分辨率。通过较详尽的计算，讨论了双电场飞行时间质谱计中各参数对质谱分辨率和灵敏度的影响及其选择的方向，并在此基础上选定了仪器的主要参量，为飞行时间质谱计的设计与改进提供了依据。还介绍了在此基础上设计与建立的脉冲激光离子源飞行时间质谱计。     

超导材料的各向异性特征与超导转变温度T_c

在本文中,以电声子机制超导电性理论为基础,用电负性均衡原理研究了由于超导材料的各向异性引起的电子态密度分布的不均匀性,晶格稳定性的差异性及超导材料中元素成键特征对超导转变温度影响的特征,提出了在各向异性的超导材料中电声子机制可以产生高的超导转变温度Tc.