Showing papers by "Nanjing University published in 1996"
TL;DR: In this article, the authors give answers to the questions of timing, tectonic style and geodynamic interpretation of south China geologic development, which implies two successive suturings of oceanic domains during the Middle-Late Proterozoic: one about 1500 Ma and one about 950 Ma.
381 citations
TL;DR: A new neural network for solving linear and quadratic programming problems is presented and is shown to be globally convergent and solve both the primal problems and their dual problems simultaneously.
Abstract: A new neural network for solving linear and quadratic programming problems is presented and is shown to be globally convergent. The new neural network improves existing neural networks for solving these problems: it avoids the parameter turning problem, it is capable of achieving the exact solutions, and it uses only simple hardware in which no analog multipliers for variables are required. Furthermore, the network solves both the primal problems and their dual problems simultaneously.
228 citations
TL;DR: In this article, a solution and solid-state study of the aqueous nucleotide coordination chemistry of the dieihyltin(IV) antitumor agent, (C 2 H 5 )2SnC1 2 (phen).
201 citations
TL;DR: The Wugongshan massif as mentioned in this paper is a metamorphic core complex formed in an extensional tectonic regime with a Mesozoic doming, and it is assumed to be formed by an early Paleozoic orogeny.
197 citations
TL;DR: In this paper, a kinematic and geochronological analysis of the 10-20 km-wide northeast-trending Dongxiang-Shexian ductile shear zone, that trends along a length of 250 km in the eastern part of the Jiangnan belt indicates a sinistral strike-slip ductile Shear that was formed during the Neo-Proterozoic.
188 citations
TL;DR: In this article, a review summarizes the preparation, skeletal structure, reactions, spectroscopic properties and non-linear optical properties of Mo(W,V)Cu(Ag),S(Se) cluster compounds.
176 citations
TL;DR: This model may provide an explanation why the binary millisecond pulsars seem to have same low magnetic fields, and is argued that conversion of neutron stars to strange stars as an origin of cosmological stars in the binaries with low-mass companions.
Abstract: We propose that some neutron stars in low-mass x-ray binaries can accrete sufficient mass to undergo a phase transition to become strange stars. The energy released per conversion event satisfies the requirements of cosmological $\ensuremath{\gamma}$-ray bursts, and the Lorentz factor of the resultant expanding fireball may exceed $5\ifmmode\times\else\texttimes\fi{}{10}^{3}$ because the strange star has very low baryon contamination. The model burst rate is consistent with observations.
151 citations
TL;DR: It is found that a domain-structure transition, from predominantly multidomain to predominantly single domain occurs at a grain size of ;150 nm~corresponding to a thickness 200–300 nm!.
Abstract: We studied the size dependence of the ferroelectric domain structure in unique free-standing ${\mathrm{PbTiO}}_{3}$ thin film, composed of grains 60--1000 nm in size, with transmission-electron microscopy. With such samples, we showed that the apparent dependence of electrical properties on the thickness of polycrystalline thin films stems from their grain-size dependence. We found that a domain-structure transition, from predominantly multidomain to predominantly single domain occurs at a grain size of \ensuremath{\sim}150 nm (corresponding to a thickness 200--300 nm). Based on these experimental results, the drastic change of coercive field and dielectric permittivity below a thickness 200--300 nm was reasonably explained as resulting from a domain-structure transition. \textcopyright{} 1996 The American Physical Society.
148 citations
TL;DR: Using this network the author can solve linear programming problems and its dual simultaneously, and cope with problems with nonunique solutions whose set is allowed to be unbounded.
Abstract: Presents a new neural network which improves existing neural networks for solving general linear programming problems. The network, without setting parameter, uses only simple hardware in which no analog multipliers are required, and is proved to be completely stable to the exact solutions. Moreover, using this network the author can solve linear programming problems and its dual simultaneously, and cope with problems with nonunique solutions whose set is allowed to be unbounded.
135 citations
TL;DR: A chemically modified microelectrode has been prepared successfully by means of electrodepositing nickel hexacyanoferrate(II-III) on a microdisk platinum electrode.
132 citations
TL;DR: A 33-year-old man with chronic renal failure due to glomerulonephritis was referred to the Jinling Hospital because of severe anemia, anorexia, nausea, and weakness during the preceding 2 months.
TL;DR: A series of neutral bis-ligands with Schiff base ligands derived from S-benzyldithiocarbazate and p -dimethylaminobenzaldehyde were prepared and characterized in this paper.
TL;DR: In this paper, pressure-temperature estimates on a group of well-equilibrated garnet pyroxenites from the Qilin locality, southeastern China have been used to construct the first detailed, locality-specific paleogeotherm for eastern China.
TL;DR: In this article, the filling role of pozzolanic material was analyzed and the influence of this material on fluidity and strength of cement was also investigated, showing that the fine material can increase the packing density and reduce the amount of water in surface layer and decrease the filling water.
TL;DR: In this paper, the authors generalize the characterization of Gorenstein flat modules over GNNs to n − FC rings (coherent rings with finite sdf−FP−injective dimension).
Abstract: In this paper, we generalize the characterization of Gorenstein flat modules over Gorenstein rings to n − FC rings (coherent rings with finite sdf−FP−injective dimension), and characterize n − FC rings in terms of Gorenstein flat and projective modules.
TL;DR: A poly(methylene green) thin film modified electrode was successfully prepared by means of electrochemical polymerization, which was carried out with cyclic voltammetric sweeps between −0.4 and +1.2 V (vs. SCE) at a glassy carbon base electrode in methylene green aqueous solution as mentioned in this paper.
TL;DR: It is proved that the new system converges globally to the solutions of the linear and quadratic programming problems.
Abstract: Two classes of high-performance neural networks for solving linear and quadratic programming problems are given. We prove that the new system converges globally to the solutions of the linear and quadratic programming problems. In a neural network, network parameters are usually not specified. The proposed models can overcome numerical difficulty caused by neural networks with network parameters and obtain desired approximate solutions of the linear and quadratic programming problems.
TL;DR: The new acid (2-methoxyanofinic acid), its methyl ester, kurarinone and kushenol I were shown to be active against the plant pathogenic fungus Cladosporium cucumerinum and the growth of the human pathogenic yeast Candida albicans.
TL;DR: The neutron-rich system is found to show significantly stronger negative deflection and consequently has a higher balance energy, especially in peripheral collisions.
Abstract: Within the framework of an isospin-dependent Boltzmann-Uehling-Uhlenbeck model using initial proton and neutron densities calculated from the nonlinear relativistic mean-field theory, we compare the strength of transverse collective flow in reactions ${}^{48}\mathrm{Ca}{+}^{58}\mathrm{Fe}$ and ${}^{48}\mathrm{Cr}{+}^{58}\mathrm{Ni}$, which have the same mass number but different neutron/proton ratios. The neutron-rich system ( ${}^{48}\mathrm{Ca}{+}^{58}\mathrm{Fe}$) is found to show significantly stronger negative deflection and consequently has a higher balance energy, especially in peripheral collisions.
TL;DR: Two new flavones isolated from Artemisia giraldii showed antibiotic activity against Staphylococcus aureus, Sarcina lutea, Escherichia coli, Pseudomonas aeruginosa, Proteus sp.
Abstract: Two new flavones, 4',6,7-trihydroxy-3',5'-dimethoxy-flavone (2) and 5',5- dihydroxy-3',4',8-trimethoxyflavone (3) were isolated from Artemisia giraldii and their structures were identified by spectroscopic methods. These two new flavones showed antibiotic activity against Staphylococcus aureus, Sarcina lutea, Escherichia coli, Pseudomonas aeruginosa, Proteus sp. Aspergillus flavus, and Trichoderma viride.
TL;DR: In this paper, it was shown that if R is a left coherent ring, then the weak global dimension w D(R) = 2 if and only if every (n − 2)th F-cosyzygy of a finitely presented right R-module has a flat envelope with the unique mapping property.
Abstract: We prove that (a) if R is a left coherent ring, then the weak global dimension w D(R) = 2) if and only if every (n – 2)th F–cosyzygy of a finitely presented right R–module has a flat envelope with the unique mapping property; (b) if R is a left coherent and right perfect ring, then the right global dimension rD(R) = 2) if and only if every (n – 2)th P–cosyzygy of a right R–module has a projective envelope with the unique mapping property; (c) if R is a commutative ring, then R is π—coherent (resp. coherent) and the exactness of 0 -> K -> F0 -> F1 with Fo and F1 (finitely) projective and K finitely generated implies the projectivity of K if and only if every finitely generated (resp, finitely presented) R–module has a (finitely) projective envelope with the unique mapping property.
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TL;DR: The posterior testing scenario is investigated and it is proved that in this scenario the subsume relation does guarantee a better fault detecting ability.
Abstract: Software test adequacy criteria are rules to determine whether a software system has been adequately tested. A central question in the study of test adequacy criteria is how they relate to fault detecting ability. We identify two idealized software testing scenarios. In the first scenario, which we call prior testing scenario, software testers are provided with an adequacy criterion in addition to the software under test. The knowledge of the adequacy criterion is used to generate test cases. In the second scenario, which we call posterior testing scenario, software testers are not provided with the knowledge of adequacy criterion. The criterion is only used to decide when to stop the generation of test cases. In 1993, Frankl and Weyuker proved that the subsume relation between software test adequacy criteria does not guarantee better fault detecting ability in the prior testing scenario. We investigate the posterior testing scenario and prove that in this scenario the subsume relation does guarantee a better fault detecting ability. Two measures of fault detecting ability will be used, the probability of detecting faults and the expected number of exposed errors.
TL;DR: The whole plants of Ajuga lupulina afforded five compounds, including three new clerodane diterpenes, l upulins A-C, whose structures were elucidated by spectral methods, showed antibacterial activities against Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli.
Abstract: The whole plants of Ajuga lupulina afforded five compounds, including three new clerodane diterpenes, lupulins A-C (1-3), whose structures were elucidated by spectral methods. Among these compounds, lupulins A (1) and B (2) as well as the acid hydrolysate (5) of lupulin D (4) showed antibacterial activities against Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli.
TL;DR: In this article, the X-ray crystallography of 2-benzoylpyridine and 1,3-propanediamine with copper perchorate in ethanol was used to characterise the structure of the Cu(bppn) 2+ cations.
TL;DR: In this article, the mean square radius of a proton in the 2.1 s 1/2 fm state is shown to be approximately 18.20 fm, which is abnormally large as compared with the meansquare radii of proton, neutron, and matter distributions.
Abstract: Proton-drip-line nuclei {sup 26}P and {sup 27}S are studied in the nonlinear relativistic mean-field theory. Calculations show that the mean-square radius of protons in the 2{ital s}{sub 1/2} state is approximately 18{endash}20 fm{sup 2} which is abnormally large as compared with the mean-square radii of proton, neutron, and matter distributions, giving a strong evidence for proton halos in {sup 26}P and {sup 27}S. This indicates that the size of proton halos is as large as that of neutron halos although there exists the Coulomb barrier in proton-drip-line nuclei. {copyright} {ital 1996 The American Physical Society.}
TL;DR: In this paper, the relativistic mean field theory was used to investigate the ground state properties of Mg isotopes from the proton-drip-line nucleus 20 Mg to the neutron-drone line nucleus 40 Mg, covering three magic numbers N = 8, 20, and 28.
TL;DR: By numerically solving the flux creep equation, the temporal and spatial evolution of the field profiles in a high-temperature superconducting slab immersed in an ac magnetic field together with a dc bias magnetic field is investigated.
Abstract: By numerically solving the flux creep equation, we have investigated the temporal and spatial evolution of the field profiles in a high-temperature superconducting slab immersed in an ac magnetic field together with a dc bias magnetic field, for the situation where the flux creep activation barrier U depends explicitly on current density j as U(j)=(${\mathit{U}}_{0}$/\ensuremath{\mu})[(${\mathit{j}}_{\mathit{c}}$/j${)}^{\mathrm{\ensuremath{\mu}}}$-1]. The fundamental ac susceptibilities of the slab as a function of temperature for different dc bias magnetic fields ${\mathit{B}}_{\mathit{d}}$, ac magnetic field amplitudes ${\mathit{B}}_{\mathrm{ac}}$, and frequencies f have been derived in a unified picture, which reproduce many of the features exhibited by experiments. We have shown that the frequency-independent critical-state model breaks down in explaining these results, which however, can be well described by means of flux creep. We have also shown that part of the loss in the high- temperature superconductors is due to flux creep. \textcopyright{} 1996 The American Physical Society.
TL;DR: In this article, it was shown that lower dimensional invariant tori always exist in the resonance gaps, although those maximum tori can not survive small perturbations in the generic case.
Abstract: For the Hamiltonian systems of KAM type, it is proved that some lower dimensional invariant tori always exist in the resonance gaps although those maximum tori can not survive small perturbations in the generic case.
TL;DR: In this paper, an iron-magnesium hydrotalcite-like compounds with Mg/Fe ratios from 1 to 10 were synthesized by using an NH 4 OH/(NH 4 ) 2 CO 3 solution as the precipitation agent.