Hardy空间及其对偶空间的小波标架表示

本文利用小波标架性质得到Ｈａｒｄｙ空间及对偶空间的刻划。     

THE CRYSTAL STRUCTURE OF THE ADDITION COMPOUND OF DECAVANADIC ACID AND 5,7-DIMETHYL-2, 3-DIHYDRO-1, 4-DIAZEPINIUM

The title compound crystallizes in the space group C_(2h)~5-P2_1/n with unit cell constantsa=10.938 A, b=19.189 A, c=13.384 A and β=105.09°. Intensities of 4022 independent reflec-tions were collected with four-circle diffractometer using MoKa radiation. After reduction fordiffractometer data, we derived first the position parameters of all the V atoms by directmethod using SHELXTL program. The coordinates of all the non-hydrogen and hydrogenatoms were obtained from successive Fourier and difference sytheses. The block-diagonalleast-squares refinement for all atoms gave a final discrepancy weighted factor R_w=0.050. The result of structure analysis shows that four protons of each decavanadic acid arecaptured by the nitrogen atoms involved in the azepine molecules which are condensation pro-ducts of ethylenediamine with acetylaceton. In crystal, the isopoly-decavanadate anion, 7-member heterocyclic azepium and the crystal water are linked together by ionic forces andhydrogen bonding and the chemical content within a unit cell has been identified as 2[H_2V_(10)O_(28)]~(-4)·8[C_7N_2H_(13)]~( 1)·12H_2O.     

τ真空

在讨论一维实标量场的定态孤粒子解时,我们注意到在标量场理论中存在另一类严格解,这类解的能量、动量和角动量都为零。因此是真空,称之为“τ真空”。若进一步要求场的正则动量为零(π=0)或要求场为实数,则τ真空自动给出通常自发破缺对称的真空解((?)=常数)。本文分别讨论了(?)理论、Sine-Gordan理论及L秩位势情况下的一级类量子修正。虽然这个真空解是一个虚数解,但是这类解对于研究真空的机制是重要的,因为过渡到欧氏空间它就成为通常的孤粒子解。     

浅论当代散文创作中的弱化倾向

新时期以来,一向自生自长的散文,忽然热闹起来.在大变革的时代,人们面临着千姿百态的人生世界和独立思考的选择,于是散文的自由轻快,便一跃成为当代人倾吐心声的最佳方式之一.当前的散文已普遍地摆脱了旧模式的束缚,敢于说真话,由主题先行的肤浅描写,牵强哲理和刻板模式,转向对现实的主客体的开掘,使散文样式更为多采多姿.但在散     

超线性液晶电光调制器及其应用

本文介绍了双稳液晶电光调制器的超线性特性以及它在制作各类特殊振幅光栅和半色调屏上的应用.实验表明,这种方法失真小,方法简便.     

CRYSTAL STRUCTURE INVESTIGATION OF VANADYL COMPLEXES OF TRIDENTATE LIGAND (Ⅰ)——THE CRYSTAL STRUCTURES OF BIS[(1-(2,4-PENTANE- DIONATO(NITROBENZOYL) HYDRAZONE)-2- ETHOXY)OXOVANADIUM] AND BIS-[(1-(2, 4-PENTANEDIONATO-(3-NITROBENZOYL) HYDRAZONE)-2- METHO

The title complexes were obtained by the reactions of bis(2,4-pentanedionato)oxovanadium VO(Acac)_2 and m-nitrophenylhydrazide m-NO_2PhCONHNH_2 in the media EtOH and MeOH respectively. The compound (Ⅰ) crystallizes in the space group PT with unit cell dimensions a=8.123(2), b=10.409(5), c=10.822(4), α=65.78(3)°, β=85.50(3)°,γ=89.04(3)°. The compound (Ⅱ) crystallizes in the space group P2_1/a with unit cell dimensions a=7.745(2), b=19.164(5), c=10.787(4), β=107.87(2)°. The resuhs of structural analyses show that the two compounds have the same characteristics: the tridentate ligand formed by condensation occupies three of the four equatorial positions of vanadium and the rest equatorial position is occupied by alkoxy group RO~-. As RO~-group also bridges the sixth coordinated position of each vanadium atom, it brings about the formation of the new type binuclear complexes of vanadium.     

高灵敏度的有机缔合物电位滴定体系

分别以“空白膜”电极为指标电极，四苯硼钠和氯代十八烷基吡啶为滴定剂，电位滴定了１００多种有机缔合物体系，用“三参数法”对大量的研究测试数据进行处理和评价，比较和确定了各电位滴定体系的滴定灵敏度和优劣次序。结果发现：滴定灵敏度高达１×１０－５ｍｏｌ／Ｌ的有４０种，其中２９种体系的灵敏度还可再提高（它们将是良好的阴、阳离子滴定剂）；达到１×１０－４ｍｏｌ／Ｌ的有３１种；达到１×１０－３ｍｏｌ／Ｌ的有１１种。上述研究结果对分析有机物（如药物、离子型表面活性剂和染料等）是十分有意义的。本文还对提高有机缔合物电位滴定体系的灵敏度问题进行了探讨     

差动调速φ250小型半连轧机组产品精度的研究——小型轧机技术改造研究之二

本工作根据φ250mm×5+φ300mm×1半连续小型轧机力能参数、动态速降与成品尺寸分布的测试资料,着重对产品精度进行了统计分析,明确了“大头—大尾”以及成品尺寸沿长度上高频率波动的形成机理,应用电流记忆法估算了K_2—K_1机架间的张力水平;指出欲进一步提高产品精度、稳定连轧过程,必须开发型钢连轧的微张力控制技术。     

廉价的抗紫外线合成树脂

在受日光直射的场所使用的塑料,由于紫外线的作用产生龟裂,色泽变黄。虽然也有耐日光照射的塑料,但价格较高。美国Uniroyal公司出售的“royal”牌号的热塑性塑料则能符合要求。“royal”是塑料和烯烃橡胶化合物的混合制品,即使受紫外线照射也不会产生裂纹。目前在户外使用最多的塑料ABS为碳与     

植物生长的光调节

美国农业部的科学家在用人工光进行植物生长调节的时间实验。目的在于通过试验获得有用植物在特别光照下培养的基础。严格控制光照,结果产生了春季开花的一品红和全年开花的菊,偶尔还产生矮化的意大利松。已经知道,波长在620和690毫微米之间的橙红色光一般对植物生长有刺激作用,并促进种子萌发。反之,在700到780毫微米光谱范围内的波长很长的红光进行照射,却阻碍花的形成和种子萌发,但促进茎的生长。例如持续用长波的红光照射,结果一人高的菊没有花,那种植物