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1.
Themes are the essence of literary works.Characters are the carriers of the themes.Thus,theme and character are closely connected.This paper mainly concentrates on the explorations of one common theme revealed in the novel-love,delineates the esthetics of life that expectation and pursuit are the persistence of human essence in consciousness,the approval of human desires and the sublimation of human nature. 相似文献
2.
Jia Baoyu in A Dream of Red Mansions and the 18th crown prince Sado in The Red Queen are both unfilial and they are lacking in love and duty to their family and country and both of them are rebels against the decline of Feudalism.They are the victims of feudalism and their rebelling is doomed to miserable and tragic results. 相似文献
3.
Translators frequently come across metaphors and similes, which are important ways of figure of speech. Figures of speech are actually vehicles of culture, and metaphorical phrases are the essence of human’s culture. So the strategies adopted in the translation of metaphors and similes are the reflection of the translators’ attitude towards culture. This paper holds the belief that foreignization should be the main translation strategy when dealing with the metaphorical phrases bearing cultural connotations. 相似文献
4.
The conductance and polarization are studied in one-dimensional ballistic quantum wire with both Rashba and Dresselhaus spin-orbit interactions.Two kinds of structures are considered in the present work,one with mixture of two interactions and the other with sequence structure of them.We find that the conductance and polarization are strongly affected by these two interactions.With both interactions we obtain a multi-peak contour of spin polarization and a dramatic oscillation pattern of spin conductance,which are due to the different combination of the two spin-orbit interactions. 相似文献
5.
Jian LIU Quan-bao WANG Hai-tao ZHAO Ji-an CHEN Ye QIU Deng-ping DUAN 《浙江大学学报(A卷英文版)》2013,14(1):38-46
The optimization design of the power system is essential for stratospheric airships with paradoxical requirements of high reliability and low weight. The methodology of orthogonal experiment is presented to deal with the problem of the optimization design of the airship’s power system. Mathematical models of the solar array, regenerative fuel cell, and power management subsystem (PMS) are presented. The basic theory of the method of orthogonal experiment is discussed, and the selection of factors and levels of the experiment and the choice of the evaluation function are also revealed. The proposed methodology is validated in the optimization design of the power system of the ZhiYuan-2 stratospheric airship. Results show that the optimal configuration is easily obtained through this methodology. Furthermore, the optimal configuration and three sub-optimal configurations are in the Pareto frontier of the design space. Sensitivity analyses for the weight and reliability of the airship’s power system are presented. 相似文献
6.
Simulation of Vapor Flows Between Two Closed Surfaces of Evaporation and Condensation at High Vacuum
The steady multi-component vapor flows between two closed surfaces of evaporation and condensation are investigated numerically by the nonlinear Bhatnagar-Gross-Krook equation.The mathematical model will make it possible to determine the profiles of the process variables between two surfaces of evaporation and condensation if the conditions of evaporation and condensation surfaces are taken into consideration.It is used to simulate the vapor behaviors of the pure dibutylphthalate and the ethylhexyl phthalate-ethylhexyl sebacate mixture.The effects of the liquid composition of the evaporaton surface,the evaporation temperature ,the condensation temperature and the distance between evaporation and condensation surfaces on the evaporation efficiency and separation factor are discussed. 相似文献
7.
The stochastic models of the usual joints are first established through intro-ducing the concepts of“clearance characteristic element”and“clearance space”.After de-riving the probability density function of the joint clearance and making the probabilisticanalysis of the resulted kinematic errors,the sampling formulas of the independent varia-bles of the joint clearances are further deduced.Through Monte Carlo simulation,the sta-tistical characteristics and frequency histograms of the kinematic errors are then analysedon computer. 相似文献
8.
Interactions between mycoplasma lipid-associated membrane proteins and the host cells 总被引:5,自引:0,他引:5
Mycoplamas are a group of wall-less prokaryotes widely distributed in nature, some of which are pathogenic for humans and animals. There are many lipoproteins anchored on the outer face of the plasma membrane, called lipid-associated membrane proteins (LAMPs). LAMPs are highly antigenic and could undergo phase and size variation, and are recognized by the innate immune system through Toll-like receptors (TLR) 2 and 6, LAMPs can modulate the immune system, and could induce immune cells apoptosis or death. In addition, they may associate with malignant transformation of host cells and are also considered to be cofactors in the progression of AIDS. 相似文献
9.
Education is a long process. The quality of citizens, the progress of culture, the prosperity of a country, the advancement of social affairs and the moral attitude of people are all determined by education. The persons who are responsible for achieving this great target are teachers who are being described as "the architect of human spirit" and "the forerunners of so- 相似文献
10.
The stress and the elastic deflection of internal ring gear in high-speed spur planetary gear units are investigated. A rim thickness parameter is defined as the flexibility of internal ring gear. Six evenly spaced linear springs are used to describe the fitting status between internal ring gear and the gearcase, The finite element model of the whole internal ring gear is established by means of Pro/E and ANSYS. The loads on meshing teeth of internal ring gear are applied according to the contact ratio and the load-sharing coefficient. With the finite element analysis (FEA), the influences of flexibility and fitting status on the stress and elastic deflection of internal ring gear are predicted. The simulation reveals that the principal stress and deflection increase with the decrease of rim thickness of internal ring gear. Moreover, larger spring stiffness helps to reduce the stress and deflection of internal ring gear. Therefore, the flexibility of internal ring gear must be considered during the design of high-speed planetary gear transmissions. 相似文献
11.
In this paper, we summarize some recent activities in the field of metamaterial research at the National University of Singapore (NUS). Integral equations are applied for electromagnetic modelling of supernatural materials. Some special characteristics of the metamaterials are shown. Moreover, quasi-static Lorentz theory and numerical method (i.e., the method of moments for solving the electric field integral equation) and the transmission line theory are both presented to obtain the effective constitutive relations of metamaterials, respectively. Finally, feasibility of fabricating metamaterials based on analysis of equivalent transmission line model in the microwave spectrum and even higher is also shown and correspondingly some broad-bandwidth and low-loss metamaterial structures are designed and synthesized. 相似文献
12.
Two-photon Jaynes-Cummimgs model is generalized to the case of Kerr medium in this paper,The field and atom are prepared initially in two-photon superposition state and ground state respectively.Nonlinear coefficient affects the dynamic behaviors of the field and atom.Evolutions of the squeezing for the operators of field and atom and the quantum inversion are discussed.In particular,the higher-order squeezing for atomic dipole and the effects of nonlinearity on it,which have not been studied by other authors,are investigated,Increasing the nonlinear coefficient will decrease the squeezing depth of atomic dipole. 相似文献
13.
Evidences for the existence of ferromanganese crust boundary were found for the first time during the survey of the “DA YANG YI HAO” Vessel 2003. Some typical characteristics of the boundary are summarized and the significances of the finding of the boundary are included in the genesis discussion. Ore prospecting and assessment of the crust resources are described in this paper. The morphologic and extending characteristics of the crust boundary led to the recognition of two types of crust boundary: interpenetration crust boundary and closed crust boundary. According to the distribution and types of the crust, however, the boundaries are classified into three types: the boundary between ferromanganese crust and detrital sediment, the boundary between tabular crust and seamount nodules, and the boundary between tabular crust and rudaceous crust. This study revealed that the boundary between tabular crust and nodules was not formed under different regional environments but formed under different nucleation potential barriers between different initial growth (nucleation and germination) processes and between solid rocks and loose sediments. The rudaceous crusts are controlled spatially by fracture zones and the crusts' boundaries are controlled by the seamount structure and landform. The discovery of the crust boundaries reveals the crust's ‘negative growth’ phenomena (especially for some seamount nodules). The boundary investigation can be helpful in identifying the existence of tabular crust covered by detrital sediments and in calculating the area covered by the crust. The resource calculation error and the resource quality as well as resource exploration degree can be assessed through the survey of crust boundary. 相似文献
14.
Rotor systems supported by angular contact ball bearings are complicated due to nonlinear Hertzian contact force. In this paper, nonlinear bearing forces of ball bearing under five-dimensional loads are given, and 5-DOF dynamic equations of a rigid rotor ball bearing system are established. Continuation-shooting algorithm for periodic solutions of the nonlinear non-autonomous dynamic system and Floquet multipliers of the system are used. Furthermore, the bifurcation and stability of the periodic motion of the system in different parametric domains are also studied. Results show that the bifurcation and stability of period-1 motion vary with structural parameters and operating parameters of the rigid rotor ball bearing system. Avoidance of unbalanced force and bending moment, appropriate initial contact angle, axial load and damping factor help enhance the unstable rotating speed of period-1 motion. 相似文献
15.
Unified analytical solutions are presented for the predictions of the stresses and displacements around a circular opening based on nonqinear unified failure criterion and the elastic-brittle-plastic softening model. Unified analytical solutions not only involve generally traditional solutions which are based on the Hock-Brown (H-B) failure criterion or the non-linear twin-shear failure criterion, but also involve other new results. The results of the radius of plastic zone, radial displacements and stresses are obviously different using three rock masses when different values of the unified failure criterion parameter or different material behavior models are used. For a given condition, the radius of plastic zone and radial displacements are reduced by increasing the unified failure criterion parameter. The latent potentialities of rock mass result from considering the effect of intermediate principal stress. It is shown that proper choices of the failure criterion and the material behavior model for rock mass are significant in the tunnel design. 相似文献
16.
Identity is the crucial characteristic to people, as it is the defining factors of what they are and what they are not. It concludes lots of things, and among which, the national identity and regional identity are the most important ones; though they are often confused in some occasions. Therefore, this essay discusses the question of the relationship of these two identities with the examples of two British films— Bloody Sunday and Kes. From the discussion, it concludes that though on some degree the region... 相似文献
17.
When an emergency happens, the scheduling of relief resources to multiple emergency locations is a realistic and intricate problem, especially when the available resources are limited. A non-cooperative games model and an algorithm for scheduling of relief resources are presented. In the model, the players correspond to the multiple emergency locations, strategies correspond to all resources scheduling and the payoff of each emergency location corresponds to the reciprocal of its scheduling cost. Thus, the optimal results are determined by the Nash equilibrium point of this game. Then the iterative algorithm is introduced to seek the Nash equilibrium point. Simulation and analysis are given to demonstrate the feasibility and availability of the model. 相似文献
18.
Network manufacturing has been rapidly developed and is going to play an important role in modern indusu‘y. The core of network manufacturing of mechanical products is the design and manufacturing based on the computer network technology. A network framework is introduced for manufacturing mechanical components at two main levels. On the design level features of the component are initially studied based on the structure and functions of the component. Details of the design procedure and contents are then analyzed with three main kinds of components. In this stage, selection of materials, calculation of sla‘ess and deflection under load, determination of the size are carried out using CAD. On the manufacturing level various aspects of CAPP are discussed, including the principle and the modes of positioning the component, the exerted clamping forces, cutting engagement and input parameters, machine tools used, and machining fluids if necessary. Finally a prototype of the network framework is presented with several pieces of data terminal equipment through a local area network, the topological structure, and data sharing and security, without concerning the use of the concurrent engineering techniques and virtual manufacturing, and virtual measuring techniques. 相似文献
19.
For time-dependent inductive-capacitive coupled circuits,the quantum fluctuations in the component circuits and the coupling part are computed.Generation of squeezing and the different effects of inductance and capacitance couplings on the quantum fluctuations are rigorously given,Meanwhile,the thermal effects are included. 相似文献
20.
Rozalina Popova-Koskarova 《美中教育评论》2010,7(8):73-77
The most significant aspects within this taking place in the educational system regarding to paper are overcoming the stereotypes and prejudices that are Roma children. In addition to this, there are couples of explorations which explain the way of how the Roma children are integrated and socialized within the school borders and more concrete within a class. In that context, it gives the marks, at the same time, the visions of the Roma students in creating a comfortable atmosphere where they would find themselves to be motivated and show their best optimal school results, as well as support and encouragement for their increased activity, motivation and initiative within the school. Also, the author presented some project experiences from Sweden and Macedonia. As a pattern of an informal education from Faculty of Pedagogy in Skopje, which is very interesting, offers possibilities for development of capabilities and awareness of unity, mutual respect, tolerance ethnic harmony and building up of the consciousness of the existence of the other, especially for Roma students. The human ideas like being the first to love and taking initiative without wanting to be loved are accessible to everyone and are especially useful for youngsters. 相似文献