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1.
依据文献计量学原理,对1990~1999年期间《原子与分子物理学报》的 论文作者群进行了统计、分析、归纳和研究,从中揭示出我国原子与分子物理学科研究的现 状,作者所属系统的分布特点及其规律,确定了该刊核心作者的数量和比例,同时也对作者 的合著率、论文单元数作了统计分析研究。从作者研究的角度肯定了该刊作为本学科核心期 刊的合理性,希冀对该学科及该刊的发展提供可参考的数据。  相似文献   

2.
正《原子与分子物理学报》是中国物理学会原子与分子物理专业委员会、四川省物理学会和四川大学联合主办的专业性学术刊物,主要报导原子与分子物理及其交叉学科(包括:凝聚态物理、激光物理、等离子体物理、光学、化学物理、非线性动力学等)的理论、实验及其应用等方面的研究成果和进展.1.开设栏目1.1研究论文:透彻、完整、清晰地报导具有学术价值的新的实验、理论结果和进展.研究论文一般分引言、理论或实验方法、结果与讨  相似文献   

3.
正《原子与分子物理学报》是中国物理学会原子与分子物理专业委员会、四川省物理学会和四川大学联合主办的专业性学术刊物,主要报导原子与分子物理及其交叉学科(包括:凝聚态物理、激光物理、等离子体物理、光学、化学物理、非线性动力学等)的理论、实验及其应用等方面的研究成果和进展.1.开设栏目1.1研究论文:透彻、完整、清晰地报导具有学术价值的新的实验、理论结果和进展.研究论文一般分引言、理论或实验方法、结果与讨  相似文献   

4.
正《原子与分子物理学报》是中国物理学会原子与分子物理专业委员会、四川省物理学会和四川大学联合主办的专业性学术刊物,主要报导原子与分子物理及其交叉学科(包括:凝聚态物理、激光物理、等离子体物理、光学、化学物理、非线性动力学等)的理论、实验及其应用等方面的研究成果和进展.1.开设栏目1.1研究论文:透彻、完整、清晰地报导具有学术价值的新的实验、理论结果和进展.研究论文一般分引言、理论或实验方法、结果与讨  相似文献   

5.
正《原子与分子物理学报》是中国物理学会原子与分子物理专业委员会、四川省物理学会和四川大学联合主办的专业性学术刊物,主要报导原子与分子物理及其交叉学科(包括:凝聚态物理、激光物理、等离子体物理、光学、化学物理、非线性动力学等)的理论、实验及其应用等方面的研究成果和进展.1.开设栏目1.1研究论文:透彻、完整、清晰地报导具有学术价值的新的实验、理论结果和进展.研究论文一般分引言、理论或实验方法、结果与讨  相似文献   

6.
正《原子与分子物理学报》是中国物理学会原子与分子物理专业委员会、四川省物理学会和四川大学联合主办的专业性学术刊物,主要报导原子与分子物理及其交叉学科(包括:凝聚态物理、激光物理、等离子体物理、光学、化学物理、非线性动力学等)的理论、实验及其应用等方面的研究成果和进展.1.开设栏目1.1研究论文:透彻、完整、清晰地报导具有学术价值的新的实验、理论结果和进展.研究论文一般分引言、理论或实验方法、结果与讨  相似文献   

7.
正《原子与分子物理学报》是中国物理学会原子与分子物理专业委员会、四川省物理学会和四川大学联合主办的专业性学术刊物,主要报导原子与分子物理及其交叉学科(包括:凝聚态物理、激光物理、等离子体物理、光学、化学物理、非线性动力学等)的理论、实验及其应用等方面的研究成果和进展.1.开设栏目1.1研究论文:透彻、完整、清晰地报导具有学术价值的新的实验、理论结果和进展.研究论文一般分引言、理论或实验方法、结果  相似文献   

8.
正《原子与分子物理学报》是中国物理学会原子与分子物理专业委员会、四川省物理学会和四川大学联合主办的专业性学术刊物,主要报导原子与分子物理及其交叉学科(包括:凝聚态物理、激光物理、等离子体物理、光学、化学物理、非线性动力学等)的理论、实验及其应用等方面的研究成果和进展.1.开设栏目1.1研究论文:透彻、完整、清晰地报导具有学术价值的新的实验、理论结果和进展.研究论文一般分引言、理论或实验方法、结果  相似文献   

9.
《原子与分子物理学报》是中国物理学会原子与分子物理专业委员会、四川省物理学会和四川大学联合主办的专业性学术刊物,主要报导原子与分子物理及其交叉学科(包括:凝聚态物理、激光物理、等离子体物理、光学、化学物理、非线性动力学等)的理论、实验及其应用等方面的研究成果和进展.1.开设栏目1.1研究论文:透彻、完整、清晰地报导具有学术价值的新的实验、理论结果和进展.研究论文一般分引言、理论或实验方法、结果  相似文献   

10.
正《原子与分子物理学报》是中国物理学会原子与分子物理专业委员会、四川省物理学会和四川大学联合主办的专业性学术刊物,主要报导原子与分子物理及其交叉学科(包括:凝聚态物理、激光物理、等离子体物理、光学、化学物理、非线性动力学等)的理论、实验及其应用等方面的研究成果和进展.1.开设栏目1.1研究论文:透彻、完整、清晰地报导具有学术价值的新的实验、理论结果和进展.研究论文一般分引言、理论或实验方法、结果  相似文献   

11.
我们测定了两种单链核糖体失活蛋白(肥皂草素和天花粉蛋白)的FTIR和FTRaman光谱。利用FTIR光谱酰胺Ⅲ区域对蛋白质的二级结构进行定量分析,计算了各种二级结构的含量。从肥皂草素和天花粉蛋白的二级结构分析可见,二者在结构上具有某种相似性,为二者功能上的相似性提供了依据。  相似文献   

12.
We solve several problems that involve imposing metrics on surfaces. The problem of a strip with a linear metric gradient is formulated in terms of a Lagrangian similar to those used for spin systems. We are able to show that the low energy state of long strips is a twisted helical state like a telephone cord. We then extend the techniques used in this solution to two–dimensional sheets with more general metrics. We find evolution equations and show that when they are not singular, a surface is determined by knowledge of its metric, and the shape of the surface along one line. Finally, we provide numerical evidence by minimizing a suitable energy functional that once these evolution equations become singular, either the surface is not differentiable, or else the metric deviates from the target metric.  相似文献   

13.
The high-pressure and high-temperature behaviors of LiF and NaF have been studied up to 37 GPa and 1000 K. No phase transformations have been observed for LiF up to the maximum pressure reached. The B1 to B2 transition of NaF at room temperature was observed at ~28 GPa, this transition pressure decreases with temperature. Unit-cell volumes of LiF and NaF B1 phase measured at various pressures and temperatures were fitted using a P–V–T Birch–Murnaghan equation of state. For LiF, the determined parameters are: α0 = 1.05 (3)×10?4 K?1, dK/dT = ?0.025 (2) GPa/K, V 0 = 65.7 (1) Å3, K 0 = 73 (2) GPa, and K′ = 3.9 (2). For NaF, α0 = 1.34 (4)×10?4 K?1, dK/dT = ?0.020 (1) GPa/K, V 0 = 100.2 (2) Å3, K 0 = 46 (1) GPa, and K′ = 4.5 (1).  相似文献   

14.
The relation for the dependence of the rate of radiationless energy conversion of the S 1 state k q on the polarity of the medium, obtained previously by the author, has been used to interpret the known literature data on the lifetime of the S 1 state of solutions of some caratenoids and phthalimides. It has been shown that in alcohols and water (normal and deuterated ones) the fluorescence quenching of 4-amino-, 4-methylamino-, and 4-dimethylamino-N-methylphthalimides (4AMP, 4MAMP, and 4DMAMP) as well as of peridinine in alcohols is due to H-bond formation. It has been established that a twofold increase in the number of amine atoms of hydrogen on passing from 4MAMP to 4AMP, as well as deuteration of solvents in the case of 4DMAMP, is followed by a decrease in k q by a factor of 1.6 and 1.75, respectively. The mechanism of quenching in complexes formed with solvent molecules by means of the H-bond is discussed. It has been concluded that the quenching of fluorescence of phthalimides in such complexes is mainly due to the intersystem crossing initiated by the oscillations of the protons or deuterons of the H-bonds.  相似文献   

15.
受控核聚变两大途径的对比与结合   总被引:6,自引:0,他引:6  
谭宝林 《物理》2002,31(3):159-161
目前人们探索受控核聚变主要是从两个方向着手:磁约束受控核聚变和惯性约束受控核聚变,但目前还无法判定到底哪一种途径更为可取,文章首先对这两种途径进行对比,指出各自的特点和困难,在此基础上提出了一种结构相对简单,成本相对较低的三轴六极磁镜系统设想,希望能将磁约束和惯性约束和惯性约束结合起来,以实现受控核聚变反应。  相似文献   

16.
本文阐述了等色染料离子对形成的实验方法,等色染料离子对的缔全机理及其形式,用吸收光谱的能级图,从电子理论角度论述了等色染料离子对的缔合效应等色化,溶剂效应等以化机理。列表示出等色染料离子对的高灵敏度,从而证明了等色染料离子对的萃取光度,浮选光度及萃取荧光光度法是高灵敏度和超灵敏度的新体系,为金属痕量和超痕量分析开辟了更为宽广的前景。  相似文献   

17.
Abstract

Infrared spectra of the products of one- and two -step reduction of both benzil and benzil-180 have been investigated in dimethylsulfoxide-d6 and tetrahydrofurane solutions. Anion-radicals have been obtained by electrochemical reduction of benzil and benzil-180; dinegative ions have been prepared by reduction of the same ketones with potassium mirror in vacuo. The band assignment has been performed using the group vibrational concept and isotopic shift data. The previous assignment of the C[dbnd]O stretching band of benzil anion-radical-has been discussed and corrected. Two bands in the infrared spectra of benzil dianion have been found to be sensitive upon 180 isotope labelling. This result certifies the presence of cis-configuration of benzil dianion in the investigated solutions. A decrease of ca. 290 cm-1 has been found for vC[dbnd]O after the transformation of the neutral benzil into an anion-radical. Conversion of benzil anion-radical into dianion has been accompanied by an additional vC[dbnd]O downward shift of 105 cm?1  相似文献   

18.
The kinetics and mechanism of the nucleophilic vinylic substitution of dialkyl (alkoxymethylidene)malonates (alkyl: methyl, ethyl) and (ethoxymethylidene)malononitrile with substituted hydrazines and anilines R1–NH2 (R1: (CH3)2N, CH3NH, NH2, C6H5NH, CH3CONH, 4‐CH3C6H4SO2NH, 3‐ and 4‐X‐C6H4; X: H, 4‐Br, 4‐CH3, 4‐CH3O, 3‐Cl) were studied at 25 °C in methanol. It was found that the reactions with all hydrazines (the only exception was the reaction of (ethoxymethylidene)malononitrile with N,N‐dimethylhydrazine) showed overall second‐order kinetics and kobs were linearly dependent on the hydrazine concentration which is consistent with the rate‐limiting attack of the hydrazine on the double bond of the substrate. Corresponding Brønsted plots are linear (without deviating N‐methyl and N,N‐dimethylhydrazine), and their slopes (βNuc) gradually increase from 0.59 to 0.71 which reflects gradually increasing order of the C–N bond formed in the transition state. The deviation of both methylated hydrazines is probably caused by the different site of nucleophilicity/basicity in these compounds (tertiary/secondary vs. primary nitrogen). A somewhat different situation was observed with the anilines (and once with N,N‐dimethylhydrazine) where parabolic dependences of the kinetics gradually changing to linear dependences as the concentration of nucleophile/base increases. The second‐order term in the nucleophile indicates the presence of a steady‐state intermediate ‐ most probably T±. Brønsted and Hammett plots gave βNuc = 1.08 and ρ = ?3.7 which is consistent with a late transition state whose structure resembles T±. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   

19.
"电路原理"、"信号与系统"和"自动控制原理"三门课程是光电信息科学与工程等专业的专业基础课。若分别采用各自独立的教学内容和方法,内容交叉、重复,浪费学时,没有从整个课程体系系统化的角度把握有关内容。因此,提出了适用于光电信息科学与工程等专业的以上三门课程的教学改革方案,从根本上系统地将这三门课程进行整合、优化为"电路、信号和控制系统"课程。在教学实践中,进行了有关内容的教学尝试,缩短了教学时间,提高了教学质量。  相似文献   

20.
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