摘要：As a central issue in stylistics, foregrounding, which can be achieved by deviation and overregularity at every linguistic level, can give readers more innovative and ingenious perspective on appreciation of text. W. B. Yeats＇ Leda and the Swan is a poem deserving close reading and attention. The analysis from sound patterning, meter and rhythm, verbal repetition endows the poem with some novel and new aesthetic significance

摘要：For the hypersonic inlet and fore-body integrated design, the non-uniform incoming flow generated by the fore-body will bring a relatively big challenge to the inward-turning inlet design. To make the inlet match the non-uniform incoming flow, this paper, based on previous studies, develops a cross-stream marching plus(CSMP) method, by which an aerodynamic surface used to generate a given shock shape can be *** method can correct such solution points as may give rise to grid distortions or flow-field abnormity and overcome the shortcoming of the insufficient stability of previous methods. Numerical simulation results of the conical supersonic flowfield show that the error obtained from the proposed CSMP method drops with the reduction of the grid dimension and the marching step, being less than 0.05% for reducing the marching step to 10%; that with this method the maximum relative error of the pressure on the profile is less than 0.23%. In the design process of the inward-turning inlets that match the fuselage fore-body, it's found that in comparison with the results of the inviscid CFD results, the aerodynamic surface designed with the CSMP method can fully generate the given shock wave shape. Thus, the CSMP method provides a new direction for the inlet/fore-body integrated design.

摘要：Anisotanols A—D(1-4),four new compounds possessing an unprecedented sesquiterpenoid skeleton with a congested tricyclic 6/3/5 ring system,were obtained from Anisodus *** structures were elucidated by comprehensive spectroscopic techniques,and the absolute configurations were confirmed via ECD calculations and single-crystal X-ray diffractions.A putative biosynthetic pathway for these compounds was *** evaluation disclosed that compound 3 showed anti-angiogenic activity by inhibiting the viability,migration,and tube formation in HUVECs.

摘要：A series of amino organophosphorus imidazoles were designed and synthesized as a novel structural type of antimicrobial *** evaluation in vitro showed that compound 3f exhibited equipotent or superior anti-methicillin-resistant Staphylococcus aureus(anti-MRSA) and anti-S. cerevisiae efficiencies(minimal inhibitory concentration(MIC)=2 μg/mL) to clinical drugs,and the combinations with antibacterial or antifungal drugs enhanced the antimicrobial efficiency. Highly active molecule 3f showed low propensity for bacteria to develop resistance, and the preliminary action mechanism studies demonstrated that 3f was membrane-active, but had no significant intercalation towards MRSA DNA. The computational study on 3f reasonably explained its high antimicrobial activity. Experimental data revealed that ground-state 3f-HSA complexes were formed mainly through hydrophobic interactions and hydrogen bonds with a spontaneous process, and the non-radioactive energy transfer from HSA to 3f occurred beyond F鰎ster resonance energy transfer theory. The participation of metal ions in 3f-HSA supramolucular system could increase the concentration of free compound 3f, and shorten its storage time and half-life in the blood to improve the maximum antimicrobial efficacy.

摘要：Topology is a newly branch of mathematics,dealing with the non-qualitative properties of members within a solid topological *** a broad sense,space is considered as an arena to exemplify the power relations,and power relationship becomes a dominant property within a topological space in a holistic ***,topology has been allied with literary criticism,arising as a transdisciplinary *** Shakespeare’s Cymbeline,three physical places-namely chamber,cave and battlefield-function as three individual topological places due to the commonality of power relationship within each *** first,Innogen,the female protagonist who is enclosed in her chamber,becomes an object of supervision and scrutiny by triplex authorities,thus female body gains a metaphorical meaning within the topological ***,she changes costumes and enters the cave,embodying as the other in terms of power relations,where gender awareness becomes ***,Innogen moves to the battlefield,gets access to the court,a public topological space symbolizing male authority,and launches an equal dialogue with men,thus constructing a brave female *** chamber to the battlefield,Innogen’s self-saving trip set up a parallel structure of topological space and a token for the subversiveness of hierarchy social order dominated by royalty,paternity and the absolute authority of husband in early Renaissance.

摘要：As the most frequent word sequence in register,lexical bundles are the basic components of *** use is of great help to the fluency and accuracy of academic *** the past two decades,the study of lexical bundles has focused on the body part of academic papers,but less on the *** order to identify and compare the differences in the use of lexical bundles in English abstracts between international and Chinese authors,this paper selects English abstracts from Chinese and International high-level academic journals in the discipline of linguistics from 2018 to 2020 to build two corpora of English abstracts of academic writings:Corpus of English Abstracts from International Linguistics Journal Articles(ILJA)and Corpus of English Abstracts from Chinese Linguistics Journal Articles(CLJA).This paper analyzes the differences of English abstract writing between Chinese and international high-level linguistics journals,and provides enlightenment for abstract writing and teaching.

摘要：This study aims to explore the humanoid robot joint servo drive integration design and adaptive backstepping control. To make the humanoid robot have explosive power as the human does, simply increasing the power output of the motor of a lightweight design cannot meet the demand of moving heavy objects and so on. Moreover, the backstepping control algorithm is designed to implement the dual-arm cooperative control. The joint servo drive is redesigned in the present study, which can drive the motor at a limitation state when needed output high-voltage pulse can stimulate the motor so that the motor can produce an instantaneous large torque. A miniature design scheme is presented in this study for the servo drive, explaining the design method of each part module. The ex- perimental data illustrate that the servo drive can produce an output torque greater than the rate of the high-voltage pulse that stimulates the motor. Knowledge of the control of humanoid robot moving a heavy object has important practical significance. The present study provides a complete actual problem and exhibits a real practical use case which can be used to speed up the explosive humanoid robot arms.

摘要：Integrating poly（lactic acid） （PLA）, glycolic acid （GA） and ethylene glycol （EG） will hopefully result in a novel copolymer that combines such advantages as fastened and controllable release rate and improved flexibility together with good biocompatibility. In this study, p-dioxanone （PDO） was employed to copolymerize with DL-lactide （LA） via ring-opening melt polymerization using Sn（Oct）2 as an initiator and ethylene glycol as a co-initiator. The obtained degradable macrodiols （HO-P（LA-co-PDO）-OH） were just such a copolymer consisting of PLA, GA and EG. 1HNMR was employed to characterize the copolymers, and the effect of PDO/LA molar ratios in the feedstock on the molecular weights of HO-P（LA-co-PDO）-OH was investigated by means of endhydroxyl analysis, 1H NMR or GPC-MALLs. The results confirmed the successful synthesis of HO-P（LA-co-PDO）-OH and revealed that one end-hydroxyl of the micarodiols was donated by LA or PDO and the other one by the co-initiator EG. In addition, the molecular weights of HO-P（LA-co-PDO）-OH increased with decreasing PDO/LA ratios.

摘要：Topology,as a geometrical branch,studies spaces,whose essence lies in its topological *** far as literary criticism is concerned,the author’s writing purpose can be regarded as an open set in topology,which contains a number of different topological *** matter how these spaces transform,they remain fundamental properties as long as their essence is *** the perspective of topology,Shakespeare constructed three equivalent metaphorical topological spaces:one-pound-flesh agreement,marriage casket“lottery”,and wedding ring *** present paper purports to explore how Shakespeare constructed the three equivalent topological spaces to express the theme of literature:the ubi sunt1 motif of life philosophy.

摘要：目的:研究高速动车组齿轮箱密封系统的密封性能的前提是分析内部油气分离性能。探讨密封系统中油气分离机理和密封间隙(轴向间隙宽度、轴向间隙高度差、径向密封齿形角和径向密封齿相对啮合深度)对油气分离效率的影响,为齿轮箱密封系统的优化设计提供理论基础。创新点:1.采用润滑油和空气混合介质作为工作介质,更贴合工程实践;2.采用液滴-壁面碰撞模型,分析油气分离过程中液滴的运动状态。方法:1.结合离散相模型和液滴-壁面碰撞模型,建立高速动车组齿轮箱的密封系统模型。2.通过试验和数值计算对比,验证仿真模拟的准确性和模型的适用性。3.通过仿真模拟,分析不同液滴直径下密封间隙对油气分离性能的影响;其中,密封间隙包含轴向间隙宽度、轴向间隙高度差、径向密封齿形角和径向密封齿相对插入深度比。结论:1.气流对油滴的拖曳力和油滴的惯性作用影响油滴运动轨迹和密封系统的油气分离效率;其中质量惯性力是主要因素,加速度惯性力与气流拖曳力是次要因素。2.随着轴向间隙宽度的增大,小直径油滴(1μm)分离效率降低,大直径油滴(5μm)分离效率基本不变,而过渡直径的油滴(2～4μm)分离效率先降低后增高。3.随着轴向间隙高度差和径向密封齿相对啮合深度的增大,油气分离效率增高。4.随着径向密封齿形角的增大,油气分离效率先降低后升高,齿形角为80°时,分离效率最低。5.油滴直径越大,密封间隙变化对油气分离效率的影响越小。