一种解决一维卷积中信息丢失的简捷方法

提出一种弥补因卷积造成信息丢失的简捷方法。理论推导表明,非中心点评估导数的卷积整数正好是若干中心点评估导数卷积整数的线性组合,而后者在修正的Savitzky-Golay表中可以找到。本法提供一种产生任意点评估卷积整数的捷径,表格编排成易于参考的形式。     

QUARK SELF-ENERGY DUE TO QUARK-PION INTERACTION

In this paper the quark self-energy with nolocal quark-pion interaction is calculated and the convergent self-energy is obtained. Based on the results it is found that the divergence is merely due to the assumption of pointlike pion made in the calculation.     

聚酯酸酐的合成及其药物释放性能研究

将对羟乙氧基苯甲酸分别与已二酰氯、癸二酰氯和对苯二甲酰氯反应,制备了含酯键的二羧酸.经熔融缩聚,合成了主链含酯键的新型聚酯酸酐.通过¹H NMR、IR及元素分析对单体及聚酯酸酐的结构进行了表征.研究了聚酯酸酐的体外降解和药物释放性能,其降解速率和释药速率次序为:聚4,4'-(已二酰氧二乙氧基)双对苯二甲酸＞聚4,4'-(癸二酰氧二乙氧基)双对苯二甲酸＞聚4,4'-(对苯二甲酰氧二乙氧基)双对苯二甲酸.     

多胺多羧酸双吡哆醇酯顺磁性金属螯合物及其弛豫性能研究

由二乙三胺五乙酸(DTPA)双酸酐和乙二胺四乙酸(EDTA)双酸酐与维生素B₆族化合物吡哆醇(PN)或其衍生物合成了一系列新型的多胺多羧酸双吡哆醇酯衍生物及其钆(Ⅲ)、锰(Ⅱ)、铁(Ⅲ)等顺磁性金属螯合物,研究了其中钆(Ⅲ)和锰(Ⅱ)螯合物在体外水溶液中对水质子的纵向弛豫性能(R₁).结果表明,所有配体和配合物均有很好的水溶性,且对光和空气稳定.螯合物的弛豫率(T₁)可与其母体螯合物相媲美,如钆-二乙三胺五乙酸二吡哆醇酯(GdDTPA-BPN)和锰-乙二胺四乙酸二吡哆醇酯(MnEDTA-BPN)的弛豫率R₁分别为5.5和3.1L·mmol^-1·s^-1,与其母体螯合物GdDTPA^2-和MnEDTA^2-的R₁值(5.2和2.8L·mmol^-1·s^-1)相当.     

MICROSCOPIC CALCULATION OF THE INERTIA IN HEAVY NUCLEI

A realistic calculation of the inertia for ²³⁶U fisson based on the linear response theory is presented, in which the single particle states are provided by Nilsson model. The dependence of the nuclear inertia M_δiδi on the collective variables δ₂, δ₄ is studied at the range of certain nuclear temperature (0—1 MeV). The pairing effect and the shell effect on the nuclear inertia are discussed. The calculated results show a very prominent structure at level crossing points and when acrossing the critical temperature.     

微量杂质对苯并三氧化呋咱(BTF)感度影响研究

苯并三氧化呋咱(BTF)是一种由三叠氮三硝基苯(TATNB)经脱氮反应制得的零氧无氢炸药,90℃～120℃温度范围内动力学参数计算外推得到其贮存寿命大约是太安的1．5倍,桥丝感度与太安相当,需要的能量较小,并使发火的电压降低,其起爆性能、输出能量、机械感度、热安定性均     

Changing Rules of Bonding Electron Pair Correlation Energies of CH3X （X = F, OH, NH2） Systems

1 INTRODUCTION It has been known that the electron correlation energy of molecular systems was, and still is, one of the most serious bottleneck problems to the chemis- try accuracy of computational quantum chemistry. Since L鰓din[1] gave the definition …     

三元体系YCl3-CdCl2-H2O和四元体系YCl3-CdCl2-HCl(～8.8%)-H2O (25℃)的相平衡及其固相新化合物的研究

研究发现稀土卤化物与一些金属卤化物所形成的化合物具有特殊的光学性质[1,2]。为了寻找这类新化合物及其它们的形成机理,文献研究了稀土卤化物与碱金属卤化物在盐酸介质中的相化学关系,且发现了新物相化合物Cs5EuCl8·14H2O和Cs2EuCl5·4H2O具有上转换发光性能[3~5]。为比较过     

离子化合物{[2-(3′-pyridyl)benzimidazoleH2]2+·[SbCl4]-·Cl-}4的水热合成、晶体结构及抑菌活性

A new ionic compound {[2-(3′-pyridyl)benzimidazoleH₂]²⁺·[SbCl₄]^-·Cl^-}₄ was synthesized by the hydrothermal reaction of o-diaminobenzene, nicotinic acid with SbCl₃ in 1∶1 HCl solution. The structure was characterized by chemical analysis, elemental analysis and IR patterns. The single crystal structure was determined by X-ray single crystal diffraction. It crystallizes in monoclinic system, space group P2₁/n with a=2.107 9(4) nm, b=1.482 0(3) nm, c=2.113 4(4) nm, β=93.44(3)°, Z=4, V=6.590(2) nm³, D_c=2.001 g·cm^-3, μ=2.480 mm^-1, F(000)=3840, R₁=0.0468, wR₂=0.1163. The single crystal structure indicates that the four chlorines coordinated to the antimony atom forms a distorted triangle bipyramid configuration together with the lone electron pair on the Sb atom. The [SbCl₄]^- to 2-(3′-pyridyl)benzimidazole cation and Cl^- by weak interaction forms the ionic crystal. It has been proved that the title compound has antibacterial activity. CCDC: 283824.