摘要：High-speed machine tool working table restrains the machining accuracy and machining efficiency,so lightweight design of the table is an important *** nature,leaf has developed a plate structure that maximizes the surface-to-volume *** can be seen as a plate structure stiffened by *** with a high-speed machine tool working table,leaf veins play a role of supporting part which is similar to that of stiffening ribs,and they can provide some new design ideas for lightweight design of the *** this paper,distribution rules of leaf veins were investigated,and a structural bionic design for the table was achieved based on regulation of leaf ***,statistical analysis on geometric structure of leaf veins was carried out,and four distribution rules were ***,relevant mechanical models were developed and analyzed in finite element *** on the results from mechanical analysis on those relevant models,the four distribution rules were translated into the design rules and a structural bionic design for the working table was *** simulation and experimental verifications were carried out,and results showed that the average displacement of the working table was reduced by about 33.9%.

摘要：A new cascade control program was proposed based on modified internal model control to handle stable,unstable and integrating processes with time *** program had totally four controllers of which the secondary loop had two controllers and the primary loop had two *** two secondary loop controllers were designed using IMC *** were decoupled completely and could be adjusted independently,which avoided the undesirable influence on performance of the primary *** main controller in the primary loop was devised as a PID using the method of minimum sensitivity,which could guarantee not only the nominal performance but also the robust stability of the system.A setpoint filter was added in the primary loop to improve the tracking *** the controllers of the two closed-loops were designed analytically,and could be adjusted and optimized by single parameter *** were carried out on three various processes with time delay,and the results show that the proposed method can provide a better performance of both set-point tracking and disturbance rejection and robustness against parameters perturbation.

摘要：In recent years,the damage caused by soil nematodes has become increasingly serious;however,the varieties and structures of the nematicides available on the market are ***,a succinate dehydrogenase inhibitor(SDHI)fungicide developed by Bayer AG in Germany,has been widely used in the prevention and control of soil nematodes due to its high efficiency and novel mechanism of *** this paper,two series of novel target compounds were designed and synthesized with nematicidal and fungicidal fluopyram as the molecular skeleton in order to introduce sulfide and sulfone *** structures were identified and characterized by 1H nuclear magnetic resonance(NMR),13C NMR,and high-resolution mass spectrometer(HRMS).The bioassays revealed that most of the compounds showed excellent nematicidal activities at 200 lg
mL-1 in comparison with fluopyram,while the nematode mortality rate dropped sharply at 100μg·mL-1,except for compounds I-11 and *** terms of fungicidal activity,compound I-9 was discovered to have an excellent inhibitory rate,and a molecular docking simulation was performed that can provide important guidance for the design and exploration of efficient fungicidal lead compounds.

摘要：A structural bionic design process is systematically presented for lightweight mechanical structures. By mimicking biological excellent structural principles, the stiffening ribs of a machining table and a moving column were redesigned for better load-bearing efficiency. Finite element method（FEM） simulation and model experiments were carried out for performance verification, which showed the increase of structural static and dynamic performance. Structural bionic offers a new solution to change conventional structures for high specific stiffness.

摘要：The year of 2018 marked the 40th anniversary of China’s reform and opening-up *** the wake of 40-year economic development at a great speed,the sharp changes in individual living conditions accompanying urbanization process and the resultant self-identity issues are similar to those situations encountered by Western developed countries in the late 19th and early 20th centuries,and are reflected in youth movies with reform and opening-up as the ***,based on the self-identity theory,an interpretation of individual development and dilemma in modern Chinese youth movies not only acts as a theoretical attempt,but also broadens the dimension in which such movies are interpreted,creating the value of interaction with *** the youth movie Us and Them(中文片名:后来的我们)as an example,this paper adopts the semiotic approach for text analysis,and abstracts“young girl”,“Beijing”,“sofa”and other symbols from this movie to form the symbolic interpretation of three channels for building self-identity in modern ***“modern-traditional”diversion in terms of three dimensionsin the process of self-identity,this movie is found with trial and effort to describe and heal the self from the perspective of creative mentality,forming a metaphor of the loss and return of self-identity amongmodern *** outcome of analysis indicates that,when encountering self-identity crisis in modern society,the Chinese masses divert culturally from the modern to the traditional,banking on eliminating self-identity crisis with traditional family identity and family culture,which reflects that the family ethics still maintain core values in the modern Chinese mass culture.

摘要：When we were moved by the warmth of Korean ethic family drama,we began to fall into the feeling that these dramas were so real just as our daily *** we tend to overlook the fact that the dramas which have been elaborated by authors are just a mirror of daily *** narrative,contrast narrative,and coincidence narrative are three main narrative techniques of Korean family *** an important narrative technique of Korean family ethic drama,suspense is a narrative skill organizing the plot and making dramas to be more *** this paper will analyze the suspense of Korean family ethic drama from these three aspects:story,plot,and metronome.

摘要：This study investigates the current situation of the film and television education in primary and secondary schools in China. The purpose is to find out the problems existing in the current film and television education in primary and secondary schools, and give improvement measures. A questionnaire was designed in this study and teachers in 89 primary and secondary schools in liaocheng City, Shandong Province filled in the questionnaires. A total of 355 valid questionnaires were collected. This study analyzed the survey data, and drawn a series of conclusions about the current situation of film and television education in primary and secondary schools on the basis of data analysis. Based on the results of the survey, some suggestions are given to provide reference for the development of film and television education in primary and secondary schools.

摘要：Published in 1991, Jen"s Typical American depicts a first-generation Chinese immigrant family"s pursuing their American Dream in the Post-War American society. By choosing Chinese American immigrants as her main characters and describing their struggling in the American society, Jen expresses her understanding of being Americans. In the novel, as they move from "sojourners" to American citizens, the Chang family shows different attitude towards Chinese and American cultural values. The dreams they pursue also vary. This thesis, through an analysis of the dreams the Chang family pursue in Typical American, attempts to demonstrate how the Chang family identify with their cultural identities in this process, and how they evolve from "sojourners" to "typical Americans".

摘要：Living and creating in the tumultuous decades from the 1960s through 1980s, Thomas Pynchon unfalteringly chooses the countercultural and civil rights movements in the United States of that age as the permanent topic of his fiction. It can be seen from Pynchon"s dramatic, sometimes fantastic narratives about these movements that the failure of the countercultural movements lies in their illusive nature in contrast with the hypocrisy and disproportionate power of the government to destruct these movements, and that the presence of American racial problems results to a great degree from the sloth prevailing over various institutions in American society when dealing with racial inequality and from American white racists" desire to eliminate an imagined threat in the face of the minorities. This paper tries to provide a different understanding that Pynchon"s writing of the marginalized or surrealistic issues in these countercultural and civil rights movements is his strategy to expose the falsehood of American myth of democracy.

摘要：Color has an intuitive expression of the material world,and is often used by creators of animated films in the narrative process of the film to express a creator’s subjective *** narration is a special mental imagination *** mainly refers to human beings perceiving colors in the external environment,and judging by their own rich life experience,and finally achieving a comprehensive cognition of external *** animated film Ne Zha has attracted the attention of the audience since its *** is because the film uses color narration ingeniously to innovate traditional stories and familiar characters,it displays the story through shocking visual expression,so that the audience can feel the influence of traditional culture while understanding the story,reflecting the unique artistic charm of color *** paper analyzes three aspects of color narration in showing the binary oppositions of goodness and evil,portraying vivid characters,promoting the development of narration,and highlighting the tension of the film,and fully expounds the importance of color narration in animated films.