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41.
Tuning Pore Size in Square‐Lattice Coordination Networks for Size‐Selective Sieving of CO2 下载免费PDF全文
Dr. Kai‐Jie Chen Dr. David G. Madden Dr. Tony Pham Katherine A. Forrest Amrit Kumar Dr. Qing‐Yuan Yang Dr. Wei Xue Prof. Dr. Brian Space Dr. John J. Perry IV Prof. Dr. Jie‐Peng Zhang Prof. Dr. Xiao‐Ming Chen Prof. Dr. Michael J. Zaworotko 《Angewandte Chemie (International ed. in English)》2016,55(35):10268-10272
Porous materials capable of selectively capturing CO2 from flue‐gases or natural gas are of interest in terms of rising atmospheric CO2 levels and methane purification. Size‐exclusive sieving of CO2 over CH4 and N2 has rarely been achieved. Herein we show that a crystal engineering approach to tuning of pore‐size in a coordination network, [Cu(quinoline‐5‐carboxyate)2]n ( Qc‐5‐Cu ) ena+bles ultra‐high selectivity for CO2 over N2 (SCN≈40 000) and CH4 (SCM≈3300). Qc‐5‐Cu‐sql‐β , a narrow pore polymorph of the square lattice ( sql ) coordination network Qc‐5‐Cu‐sql‐α, adsorbs CO2 while excluding both CH4 and N2. Experimental measurements and molecular modeling validate and explain the performance. Qc‐5‐Cu‐sql‐β is stable to moisture and its separation performance is unaffected by humidity. 相似文献
42.
V. V. Bezotosnyi A. A. Kozyrev N. S. Kondakova S. A. Kondakov O. N. Krokhin G. T. Mikaelyan V. A. Oleshchenko Yu. M. Popov E. A. Cheshev 《Bulletin of the Lebedev Physics Institute》2016,43(12):369-370
Samples of cw laser diode arrays (LDAs) with an output power higher than 60 W emitting in the spectral range of 808 nm are developed and fabricated. Main output parameters, including light–current, current–voltage characteristics, and emission spectra of a lot of 5 LDAs are measured. 相似文献
43.
K. G. W. Inn E. Hall J. T. Woodward IV B. Stewart R. Pollanen L. Selvig S. Turner I. Outola S. Nour H. Kurosaki J. LaRosa M. Schultz Z. Lin Z. Yu C. McMahon 《Journal of Radioanalytical and Nuclear Chemistry》2008,276(2):385-390
Recoil ions from alpha-particle emission can contaminate surface-barrier detection systems. This contamination results in
increased measurement uncertainty, and may require the replacement of expensive detectors. Disposable thin Collodion films
are easily prepared and effectively retard the recoil ions when either directly applied to the surface of alpha-sources or
as catcher foils between the source and the detector. The thin films are particularly effective for relatively low-level sources,
but can sustain structural damage when exposed to high levels of recoil ions (tens of thousands per second) over extended
periods of time. 相似文献
44.
Zalar B Lebar A Ailion DC Kuzian RO Kondakova IV Laguta VV 《Physical review letters》2010,105(22):226402
Breaking of the average cubic symmetry in Li-doped potassium tantalate was observed with quadrupole-perturbed 7Li NMR at temperatures (150-400?K) far above the nominal glass transition temperature (≈50 K for Li concentration x=0.03). The observed spectrum consists of contributions from both isolated Li ions (i.e., with no nearest-neighbor Li) and from Li-Li pairs. The isolated Li ions move among six equivalent off-center sites in a potential having cubic symmetry. These have zero average electric field gradient and, hence, exhibit no quadrupole splitting. In addition, very low intensity, but well resolved, quadrupole satellites having a temperature-dependent splitting were observed. This splitting indicates that the various Li-Li pair configurations are not all equally probable. These are the first direct observations of biased Li ion ordering that persists in the paraelectric phase at temperatures high above the glass phase. 相似文献
45.
Ashley Ringer McDonald Jessica A. Nash Paul S. Nerenberg K. Aurelia Ball Olaseni Sode Jonathon J. Foley IV Theresa L. Windus T. Daniel Crawford 《International journal of quantum chemistry》2020,120(20):e26359
The Molecular Sciences Software Institute (MolSSI) is an National Science Foundation (NSF) funded institute that focuses on improving software, education, and training in the computational molecular sciences. Through a collaboration with the Molecular Education and Research Consortium in Undergraduate computational chemistRY (MERCURY), the MolSSI has developed resources for undergraduate and other early career students to lay an educational foundation for the next generation of computational molecular scientists. The resources focus on introducing best practices in software engineering to students from the very start to make their software more useable, maintainable, and reproducible. 相似文献
46.
V. I. Danchenko E. N. Kondakova 《Proceedings of the Steklov Institute of Mathematics》2012,278(1):41-50
Under simple interpolation by simple partial fractions, the poles of the interpolation fraction may arise at some nodes irrespective of the values of the interpolated function at these nodes. Such nodes are said to be singular. In the presence of singular nodes, the interpolation problem is unsolvable. We establish two criteria for the appearance of singular nodes under an extension of interpolation tables and obtain an algebraic equation for calculating such nodes. 相似文献
47.
48.
William T. Farrar IV Guy C. Van Orden 《Nonlinear dynamics, psychology, and life sciences》2001,5(3):223-265
Five simulations mimicked benchmark phenomena of intact and dyslexic word naming. Initially, an iterative map was tuned to simulate the frequency × consistency interaction in skilled naming. Subsequently, two model parameters were changed, in turn, to produce the regularization error of surface dyslexia (PINT pronounced to rhyme with /mint/), absent pseudoword (BINT) naming of phonological dyslexia (words are named correctly; pseudowords are not), the semantic error of deep dyslexia (BUSH named as /tree/), and a dissociation in picture naming of spoken versus written responses (the spoken response to a picture of a bush is /tree/, but the written response is BUSH). All errors, except absent pseudoword naming, were simulated as transcritical bifurcations. 相似文献
49.
Ya. L. Gol'dfarb M. S. Kondakova é. A. Krasnyanskaya M. A. Vinogradova 《Russian Chemical Bulletin》1964,13(12):2081-2084
Summary By the reaction of 3,4-bischloromethyl-2,5-dimethylthiophene with diamines, condensed systems containing eight-, ten-, and fifteen-membered rings may be obtained.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12 p. 2182–2187, December, 1964 相似文献
50.