Showing papers by "Tongji University published in 1990"
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01 Jan 1990
TL;DR: The genogram (a visual depiction of the patient’s family relationships and other relevant information) helps the doctor to get a clear understanding of symptoms, life events, and diseases across three generations.
Abstract: In case of a disease, the family system can function as a burden or a resource and support system. The genogram (a visual depiction of the patient’s family relationships and other relevant information) helps the doctor to get a clear understanding of symptoms, life events, and diseases across three generations. The different phases of the family dialogue are: joining, context and mission clarification, questions about family dynamics and psychological resources and challanges, treatment planning, and conclusion of the interview. The following communication techniques can proof to be useful tools in conducting a family interview: direct disease-related questions, indirect or circular questions, and hypothetical questions.
104 citations
TL;DR: The marine Neogene faunas in China are largely fluvial and lacustrine in origin and composed of mudstones, sandstones and conglomerates with local occurrences of lignites and diatomites.
69 citations
TL;DR: The introduced surfaces can be interpreted as functional splines, which fulfill geometric continuity conditions, and are used for interpolation, approximation, blending surfaces and solids, filling of surface holes and rounding solids.
47 citations
TL;DR: Samples taken from DSDP sites 552 and 553 on Hatton Drift and site 611 on Gardar Drift in the northeast Atlantic Ocean were examined by analyses of carbonate content, coarse fraction amount and composition, fine fraction size and composition and oxygen isotope ratios.
Abstract: Samples taken from DSDP sites 552 and 553 on Hatton Drift and site 611 on Gardar Drift in the northeast Atlantic Ocean were examined by analyses of carbonate content, coarse fraction amount and composition, fine fraction size and composition, and oxygen isotope ratios. The age of both sections is the mid-Pleistocene, ranging from the end of the Jaramillo Normal Event to the boundary between the Matuyama and Brunhes epochs (about 0.77–0.96 Ma). Records of this time show a change from a dominance of 23 ka to longer periodicity at about 0.818 Ma. This is marked at site 552, but less so at site 611. The grain size is mainly controlled by coccoliths, foraminifera and ice-rafted material, all of which are related to glacial-interglacial changes. Zones barren of and abundant in coccoliths are sensitive indicators of climatic effect. Carbonate increase lags behind foraminiferal oxygen isotope records of surface warming in several glacial to interglacial transitions at both drifts. Different types of carbonates oozes occur on Hatton and Gardar drifts. Of several possible factors influencing these, bottom current effects seem more significant than others, deduced from size analysis of the fine fraction. Sedimentological results in this study further confirm that sediment drifts in the NE Atlantic have maintainted their basic characteristics at least since the mid-Pleistocene.
33 citations
22 citations
TL;DR: In this article, the reflection and transmission of ultrasonic waves by a layer-like region of distributed microcracks in a bulk material has been investigated, and it has been assumed that for sufficiently low frequencies and far away from the damaged layer, the reflected and transmitted waves are plane waves.
Abstract: Reflection and transmission of ultrasonic waves by a layer-like region of distributed microcracks in a bulk material has been investigated. It has been assumed that for sufficiently low frequencies and far away from the damaged layer, the reflected and transmitted waves are plane waves. By applying the Betti reciprocal theorem to a cell containingN cracks, and by choosing one elastodynamic state as the actual wave state and the other as a suitably chosen auxiliary wave state, the reflection and transmission coefficients have been expressed in terms of integrals over theN cracks. Simple expressions have been obtained for the case that all cracks are identical and parallel to each other. For the case that the cracks do not interact with each other, numerical results for the reflection and transmission coefficients are presented for a distribution of penny-shaped cracks. The variation of these coefficients with frequency, relative layer thickness and angle of incidence has been displayed in graphs.
19 citations
TL;DR: It is proved that the convergence rate of the algorithm is bounded away from 1 independently of the meshsize and of the penalty parameter.
Abstract: In this paper we describe a multi-grid algorithm for the finite element approximation of mixed problems with penalty by the MINI-element. It is proved that the convergence rate of the algorithm is bounded away from 1 independently of the meshsize and of the penalty parameter. For convenience, we only discuss Jacobi relaxation as smoothing operator in detail.
13 citations
TL;DR: In this paper, the existence and uniquenss theorems for the linear and non-linear Riemann-Hilbert problems for the generalized holomorphic vector of the second kind were proved.
13 citations
TL;DR: In this article, the authors used 18 subjects for four tests (heart rate, subjective assessment, photographic technique and method of limits) simulating operations to investigate the reasonable heights of sink, work surface and cooking table.
Abstract: Housework is the major part of physical output in a family; the energy consumption of a housewife is 3000 kcal/day The kitchen is the typical working area in a house, and the degree of comfort relies greatly on the reasonable heights of sink, work surface and cooker This study used 18 subjects for four tests (heart rate, subjective assessment, photographic technique and method of limits) simulating operations to investigate the reasonable heights of sink, work surface and cooking table
9 citations
TL;DR: In this paper, the system engineering method is applied and the quantitative evaluation method of synthetical evaluation of labour intensity is briefly mentioned and a detailed application of the Analytic Hierarchy Process (AHP) is also discussed.
Abstract: In this paper the systems engineering method is applied and the quantitative evaluation method of synthetical evaluation of labour intensity is briefly mentioned. A detailed application of the Analytic Hierarchy Process (AHP) is also discussed.
8 citations
TL;DR: A formal theory for the statistical operator of the "steady state" in periodically driven matter is given in this paper, where the periodic fields are changed to have an amplitude increasing with e ηt, where η is taken to be zero at the end.
Abstract: A formal theory for the statistical operator of the “steady state” in periodically driven matter is given. For this purpose the periodic fields are changed to have an amplitude increasing with e ηt , where η is taken to be zero at the end. This procedure allows for a correct description of energy denominators. The results following from the steady state operator are compared with the long time behaviour obtained from n th order response and are shown to agree. Thus the proposed statistical operator has all properties required.
TL;DR: The leukocyte interferon was investigated for its effects on the NK activity of peripheral blood mononuclear cells from 4 cases of gynecological malignancies and the level of NK activity ascended significantly in every case nearly to normal.
Abstract: A release assay of 125IUdR-labelled K562 cells as target cells was performed for measuring natural killer (NK) activity of mononuclear cells in the peripheral blood of 92 cases, including 42 healthy women, 22 patients with gynecological benign tumors, and 28 patients with gynecological malignancies The NK activity of malignant tumor group was obviously lower than that of healthy women and of benign tumor group, suggesting that a defective NK activity was present in the patients with gynecological malignancies The NK activity in patients with ovarian malignant tumors was much lower than in those with cervical cancer, the difference being of statistical significance In this study the leukocyte interferon was investigated for its effects on the NK activity of peripheral blood mononuclear cells from 4 cases of gynecological malignancies The level of NK activity ascended significantly in every case nearly to normal The augmentation of NK activity by interferon may be used as a new immunotherapy for gynecological malignancies
TL;DR: In this paper, a boundary element method using finite strip discretization is proposed to investigate the three-dimensional scattering behavior of waves in a half space, where the scatterers examined are an irregular surface and a cavity.
Abstract: A boundary element method using finite strip discretization is proposed to investigate the three-dimensional scattering behaviour of waves in a half space. The scatterers examined are an irregular surface and a cavity in a half space. The numerical examples demonstrate the remarkably good accuracy of the results and validate the application of the present method to solve three-dimensional scattering problems.
TL;DR: In this paper, the spin-polarized self-consistent charge discrete variational (SCC-DV-Xα) calculations for the garnets GGG(Ca, Mg, Zr), GGG, YGG and YAG were reported.
Abstract: This paper reports the spin-polarized self-consistent-charge discrete variational (SCC-DV-X
α) calculations for the garnets GGG(Ca, Mg, Zr), GGG, YGG and YAG. The calculated values of 10Dq for these garnets are reported for the first time, and are in good agreement with the experimental values. The relation between the calculated values and the distances of the central ion and the ligand ions is discussed. The energy values of the doublet state2
E
g were also obtained, and the reason why YAG:Cr3+ only emits sharp fluorescence whereas GGG(Ca, Mg, Zr):Cr3+ can also emit strong broad fluorescence are explained.
TL;DR: Based on the hydrodynamic theory and the transfer-matrix method, Wang et al. as mentioned in this paper studied the optical properties by taking account of damping effects to the system of the metallic.
Abstract: Based on the hydrodynamic theory and the transfer-matrix method, we have studied the optical properties by taking account of damping effects to the system of the metallic. and dielectric Fibonacci quasi-periodic superlattice for -polarized soft -rays and extreme ultraviolet. The analytical expression for the reflectivity is formally given. From our numerical results, we find that besides the reflection intensity spectrum has a very rich structure of self-similarity, "the stronger reflection peaks appear at the region of soft -rays and ultraviolet compared with metal-metal superlattice, and the width of the maxima is dependent on the dielectric functions of metallic and dielectric media. By using the periodic condition approximation, we also discussed the electromagnetic normal modes in the system, which explains the reflection spectra, and we found that with the increasing of the generation number, the electromagnetic modes all become localized.
TL;DR: In this article, the stability of cantilever rectangular plates under the symmetrical edge loading was studied by the variational calculus, and the minimum critical loadings for rectangular plates subjected to various edge loadings symmetrically on a pair of opposite free edges were discussed.
Abstract: The stability of cantilever rectangular plates under the symmetrical edge loading will he studied in this paper by the variational calculus. We are going to find out the minimum critical loading for cantilever rectangular plates subjected to various edge loadings symmetrically on a pair of opposite free edges. We'll discuss the least critical loadings when the buckling of rectangular plates acted on by a pair of concentrated forces, uniformly distributed loads, locally uniform distributed loads, distributed loads in the form of triangle and a pair of concentrated couples occur respectively.
TL;DR: In this paper, the mean vector of a multivariate normal distribution is estimated for a class of priors whose vector of first moments and matrix of second moments satisfy some given restrictions.
Abstract: The mean vector of a multivariate normal distribution is to be estimated. A class Γ of priors is considered which consists of all priors whose vector of first moments and matrix of second moments satisfy some given restrictions. The Γ-minimax estimator under arbitrary squared error loss is characterized. The characterization follows from an application of a result of Browder and Karamardian published in Ichiishi (1983) which is a special version of a minimax inequality due to Ky Fan (1972). In particular, it is shown that within the set of all estimators a linear estimator is Γ-minimax.
TL;DR: Some conservation laws or path independent integrals for transient elastodynamics are presented in this paper, and their applications in transient elasticodynamic crack analysis are discussed in Section 2.1.
Abstract: Some new conservation laws or path-independent integrals for transient elastodynamics are presented. Their applications in transient elastodynamic crack analysis are discussed.
TL;DR: In this paper, a time-domain boundary integral equation method is presented to calculate elastodynamic stress intensity factors generated by the incidence of stress (or displacement) pulses on single cracks and systems of two collinear cracks.
Abstract: Dynamic interaction between a macrocrack and a collinear, neighboring microcrack is investigated. The mathematical formulation presented here is two-dimensional, and for a state of antiplane strain. A time-domain boundary integral equation method is presented to calculate elastodynamic stress intensity factors generated by the incidence of stress (or displacement) pulses on single cracks and systems of two collinear cracks. As a check of the time-stepping technique presented here, numerical calculations have been carried out for pulse incidence on a single crack, and the results have been compared with those of other authors. For macrocrack-microcrack configurations the variation of the effective stress intensity factors at the tips of the macrocrack with time, with the microcrack location, and with the microcrack size will be displayed and discussed.
TL;DR: In this paper, the stability of a thin elastic circular shallow spherical shell under the action of uniform normal pressure with a clamped edge was investigated. And the analytic formula for determining the centre deflection and the critical load was also derived.
Abstract: In this paper we consider the nonlinear stability of a thin elastic circular shallow spherical shell under the action of uniform normal pressure with a clamped edge When the geometrical parameter k is large, the uniformly valid asymptotic solutions are obtained by means of the singular perturbation method In addition, we give the analytic formula for determining the centre deflection and the critical load, and the stability curve is also derived This paper is a continuation of the author's previous paper[11]
01 Jan 1990
TL;DR: In this paper, the Fourier eigen transform to the boundary element method in elastodynamics is introduced and the new approach is very attractive in saving computer time, which is very useful in saving computational resources.
Abstract: The use of Fourier eigen transform to the boundary element method in elastodynamics is introduced. The new approach is very attractive in saving computer time.
TL;DR: The techniques of semantic differential scale and factor analysis have been used to investigate the optimum lighting conditions of the visual environment for the exhibition of cultural relics as discussed by the authors, and the results showed that semantic differential scales can be used to determine the optimal lighting conditions for cultural artifacts.
Abstract: The techniques of semantic differential scale and factor analysis have been used to investigate the optimum lighting conditions of the visual environment for the exhibition of cultural relics. Bron...
TL;DR: This work starts with practical and fundamental problems, such as inventory control, decision-making supproted production planning system and dynamic scheduling in the workshop level, and the suggested strategy is from MRP I, MRP II to CIM; from function modules, subsystems to the complete system.
TL;DR: In this paper, the second harmonic generation at metal suriaces was calculated by using correlated basis function theory, where the electron correlation can be considered more property in this approach, and the theoretical results are closer to the experimental data.
Abstract: For the second harmonic generation at metal suriaces, the existing theoretial results obtained from hydrodynamics and the density functional theory are one order of magnitude deviated from the experimental data. We calculate the second harmonic generation at Al, Mg and Ag surfaces by using the correlated basis function theory. Since the electron correlation can be considered more property in this approach, our theoretical results are closer to the experimental data.
TL;DR: In this paper, the effect of inelastic perturbation on the Zener transition in dissipative driven systems has been investigated in adiabatic approximation, and two canonical transformations are used to simplify the model Hamiltonian.
Abstract: The effect of inelastic on the Zener transitions in dissipative driven systems has been investigated by conventional perturbation theory in adiabatic approximation. Two canonical transformations are used to simplify the model Hamiltonian. In zeroth order approximation, we reproduce the previous results. Moreover, our theory can be used to calculate easily the higher order correction terms that would be difficult to obtain in the previous theory.
01 Jan 1990
TL;DR: In this paper, a non-hypersingular time-domain boundary integral formulation for elastodynamic crack problems is presented, which is based on a conservation integral and is valid for arbitrary cracks.
Abstract: A formulation to obtain non-hypersingular time-domain boundary integral equations is presented for elastodynamic crack problems. The formulation is based on an elastodynamic conservation integral. The resulting integral equations are relatively simple in forms and are valid for arbitrary cracks. An advantage of this formulation is the immediate less singularity of integrals.
TL;DR: In this paper, the interaction of time-harmonic elastic waves with a surface-breaking crack, which is inclined under an arbitrary angle with the free boundary of an elastic halfplane, is investigated.
Abstract: The dynamic interaction problems of three-dimensional linear elastic structures with arbitrary shaped section embedded in a homogeneous, isotropic and linear elastic half space under dynamic disturbances are numerically solved. The numerical method employed is a combination of the time domain semi-analytical boundary element method (SBEM) used for the semi-infinite soil medium and the semi-analytical finite element method (SFEM) used for the three-dimensional structure. The two methods are combined through equilibrium and compatibility conditions at the soil-structure interface. Displacements, velocities, accelerations and interaction forces at the interface between underground structure and soil medium produced by the diffraction of wave by an underground structure for every time step are obtained. In dynamic soil-structure interaction problems, it is advantageous to combine the SBEM and the SFEM in an effort to produce an optimum numerical hybrid scheme which is characterized by the main advantages of the two methods. The effects of the thickness, the ratio of length and diameter of underground structure and the soil medium on dynamic responses are discussed.