Cleaning of two mirrors in the first mirror unit using radiofrequency capacitively coupled plasma

First mirror(FM)cleaning,using radio frequency(RF)plasma,has been proposed to recover FM reflectivity in nuclear fusion reactors such as the International Thermonuclear Experimental Reactor(ITER).To investigate the influence of simultaneous cleaning of two mirrors on mirror cleaning efficiency and uniformity,experiments involving single-mirror cleaning and dual-mirror cleaning were conducted using RF capacitively coupled plasma in the laboratory.For the test and simultaneous cleaning of two mirrors,the FM and second mirror(SM),both measuring 110 mm×80 mm,were placed inside the first mirror unit(FMU).They were composed of 16 mirror samples,each with a dimension of 27.5 mm×20 mm.These mirror samples consist of a titanium-zirconium-molybdenum alloy substrate,a 500 nm Mo intermediate layer and a 30 nm Al_(2)O_(3) surface coating as a proxy for Be impurities.The cleaning of a single first mirror(SFM)and the simultaneous cleaning of the FM and SM(DFM and DSM)lasted for 9 h using Ar plasma at a pressure of 1 Pa.The total reflectivity of mirror samples on the DSM did not fully recover and varied with location,with a self-bias of−140 V.With a self-bias of−300 V,the total reflectivity of mirror samples on the SFM and DFM was fully recovered.The energy dispersive spectrometer results demonstrated that the Al_(2)O_(3) coating had been completely removed from these mirror samples.However,the mass loss of each mirror sample on the SFM and DFM before and after cleaning varied depending on its location,with higher mass loss observed for mirror samples located in the corners and lower loss for those in the center.Compared with SM cleaning,the simultaneous cleaning of two mirrors reduced the difference between the highest and lowest mass loss.Furthermore,this mass loss for the mirror samples of the DFM facing the DSM was increased.This indicated that mirror samples cleaned face to face in the FMU simultaneously could influence each other,highlighting the need for special attention in future studies.

Integration of Ideological and Political Education in College Physics Courses Under the Reform of Smart Teaching

The development of the times has prompted China to enhance the quality of education and the value of talent.As guides for students,teachers should conscientiously implement ideological and political education,create college physics courses that are more in line with modern talent cultivation,eliminate the fixed and singular nature of traditional teaching,and find the integration points of ideological and political education.Teachers need to use the textbook itself,the expansion of resources in smart classrooms,and current technological progress to implement ideological and political education in order to cultivate more high-quality and high-level comprehensive talents for society.

Investigating Learners＇ Satisfaction Towards MOOC -- An Empirical Study Based on Western Ethics History Course

This research aims to focus on investigating relationships between students' satisfaction and five variables including perceived quality of course,ease of using system,self-efficacy performance of learning tool and ability of using computer.The sample for the study was taken from School of Foreign Studies in Anhui Jianzhu university.Then,data analysis including factor analysis,correlation analysis and regression analysis through SPSS 19.0 were used to test reliability,correlation and relationships between independent variables and dependent variable respectively.The results showed that perceived quality of course,ease of using system,and performance of equipment significantly positive impacted students' satisfaction towards MOOC,while ability of using computer negative impacted learners' satisfaction,besides,self- efficacy did not posit a significant impact on students' satisfaction.The academic and practical implications of this study are discussed.

Spatial Distribution and Formation Mechanism of Chinese Folk Song Cultural Landscape Genes

Folk song as a representative of traditional Chinese folk culture is the expression of landscape culture in a certain regional space.According to landscape gene theory,gene structure of folk song cultural landscape was recognized from two dimensions:subject form and cultural environment,and quantitative data were combined to analyze spatial distribution features of folk song cultural landscape genes.According to the analysis,in terms of style,work song is mainly distributed on plains,mountain song is distributed in mountainous areas,and ditty in the eastern watershed of the Yangtze River,in terms of theme,work and production folk songs are mainly distributed in eastern regions with intensive farming,while love and marriage folk songs in regions far away from the Central Plain Culture.Folk song cultural landscape is a result of the interaction between man and geographical conditions,residents in different geographical environments have different perception spaces to create folk songs with regional cultural symbols.

Cross- cultural Communication and Chinese Folk Culture

This paper aims to investigate the way for Chinese people to gain respect in cross- cultural communication and facilitate the appreciation and experience of the aesthetical spirit embedded in the splendid traditional Chinese culture. Via promoting our ethnic culture,Chinese culture can be properly developed and enriched,meanwhile,one can shape a self-personality characterized with an ethnic spirit. As has been commonly stated,Chinese culture is a sound base to win respect from foreign cultures. Therefore,folk culture plays a key role in the value system. It can directly shape an individual's personality and influence his or her status in international exchanges,which is deeply related to the dignity of the nation or the ethnical group.

On Signs of Romantic Literature Modernity

From the romantic literary theory,this paper studies the romantic literature modernity signs linking with the problem of romanticism and modernity originated in postmodern culture research upsurge.With the gradual deepening of postmodern discussion,we suddenly found that the romantic quietly rose in the postmodern aesthetic purport.In all kinds of modernism,it is easy to find a lot of elements of romanticism involved in the trace of style.The root of similar between them is that the modernity still causes wide attention among academics.According to the article,the romantic literatures focus on typical character and expression which contains the ideas of some emotional tendencies.Especially the introduction of the aesthetics of modernity makes us reexamine the romantic and also expands a new field of vision.From the other hand the romanticism to study the signs of modernity opens up a new path.

Study on the Relation of Definite Integral and Indefinite Integral

Relation of definite integral and indefinite integral was discussed and an important result was gotten. If f(x) is bounded and has primary function, the formal definite integral x s f(t)dt is the indefinite integral of f(x), where x is a self-variable, s is a parameter,~f(x) is a function defined in(-∞, +∞), which comes from f(x) by restriction and extension. In other words, the indefinite integral is a special form of definite integral, its lower integral limit and upper integral limit are all indefinite.

Application of A New Anchor Cable Mounting Rod in the Lower Soft Coal Seam of Splitting and Merging Coal

To obtain the deep displacement of the coal seam in the working face,multi-point displacements were installed in the coal seam, but the installation of multi-point displacement is differen tunder different geological conditions. This paper is based on the splitting and merging of 7_1 coal and 7_2 coal in Huaibei Mining(Group) Co., Ltd., and analyzes properties of the roof andcoal in the 7_2 coal of the lower coal seam of bifurcation area, and calculates the damage depth of the floor in the process of 7_1 coal mining. The multi-point displacement meter installation is often challenged by hole collapse, stuck pole and broken installation rod in 7_2 coal of the soft coal seam of bifurcation area, as a result, the base points can't be installed in the specified location. In view of this, this paper adopts a new anchor cable mounting rod which can install the whole base points to the specified location without stuck pole or broken mounting stem. All the basic displacement data can be obtained, and the law of mine pressure appearance in stope and tunnel can be accurately controlled, which can be used to maintain the stability of roadway and the safety of stope.

A Study of Cognitive Mechanism of Polysemy Word“Star”From the Perspective of Embodied Philosophy

Embodied philosophy see metaphorical and metonymy thinking and language as grounded in the interactions between bodily experience,mind,and world.An important application of embodied philosophy is to explain the cognitive mechanism behind the generation of polysemy in language.As a crucial part of cognitive linguistics,conceptual metaphor and metonymy theory illustrates the progress of human’s cognitive capacities essentially,i.e.from concrete and simple categories to abstract and complex categories.This paper advocates a method of seeking the relation between metonymy and metaphor in generating polysemic words to prove that embodied philosophy lays the philosophical theoretical foundation for language research,including the mechanism and specific methods of adopting this method.By examining the relation between metaphor and cognitive mind supported by embodied philosophy,the traditional view that language is autonomously generated can be eradicated.On the basis of previous researches,this paper adopts the mechanism of a continuum of metaphor and metonymy to illustrate polysemy through a case study of the word“Star”and analyzes the reflection of embodied philosophy in the generation of polysemy.The findings will bring certain advantages to the cognitive study of polysemy,to the research on interaction between metaphor and metonymy,and to the reflection of philosophy in language.

Loss of Faith: A Preliminary Study of Young Goodman Brown

Young Goodman Brown is one of the most popular short stories written by Nathaniel Hawthorne. Since its publication,quite a lot of analyses have been made of this short but excellent story. In reading the book, one can never miss those symbolic meanings. However, with an analysis of the journey which Brown takes, the artistic skills and symbolic images carefully employed by Hawthorne, this thesis aims at describing the loss of faith, and also attempting to seek the reasons for Brown's tragedy and find possible solution to this dilemma of faith crisis.

Effects of hydrogenation temperature on room-temperature compressive properties of CMHT-treated Ti6Al4V alloy

Compression tests were performed at room temperature to investigate the effects of hydrogenation temperature on compressive properties of Ti6 Al4 V alloy treated by continuous multistep hydrogenation treatment(CMHT).Pressure-composition isotherms and micro structures were also studied.Results showed that the equilibrium hydrogen pressure increased,and the hydrogen absorption rate decreased with the increase of hydrogenation temperature.The amounts ofβphase andα"martensite increased first and then decreased when Ti6 Al4 V alloy was treated by four times CMHT with the increase of hydrogenation temperature.Hydrogenation temperature played a different role on the compressive properties of CMHT-treated Ti6 Al4 V alloy.The ultimate compression of Ti6 Al4 V alloy treated by 11 times CMHT at850℃increased by 83.3%as compared to the as-received Ti6 Al4 V alloy.The compressive properties of Ti6 Al4 V alloy were dependent on the amounts of different phases and microstructures when Ti6 Al4 V alloy was treated by CMHT at different temperatures.

Genetic Study Identifies CBLN4 as a Novel Susceptibility Gene for Accident Proneness

Frequent traffic accidents constitute a major danger to human beings.The accident-prone driver who has the stable physiological,psychological,and behavioral characteristics is one of the most prominent causes of traffic accidents.The internal link between the individual characteristics and the accident proneness has been a difficult point in the accident prevention research.The authors selected accident-prone drivers as cases and safe drivers as controls(case-control group) from 18,360 drivers who were enrolled from three public transportation incorporations of China using area stratified sampling method.The case-control groups were 1:1 matched.The authors performed genome-wide association study(GWAS) by 179 cases and 179 controls using the U.S.Affymetrix Genome-Wide Human Mapping SNP 6.0Array.The authors observed that the gene frequencies of34 single-nucleotide polymorphisms(SNPs) in three regions of cases were higher than those in the control(P < 10^(–4)).The authors then tested two independent replication sets for strong association 6 SNPs in 349 pairs of case-control drivers using the U.S.ABI 3730 sequencing method.The results indicated that SNP rs6069499 within linked CBLN4 gene are strongly associated with accident proneness(Pcombined= 6.37×10^(-10)).According to CBLN4 gene mainly involved in adrenal development and the regulation of secretion,the authors performed 12 biochemical parameters of the blood using radioimmunoassay.The levels of dopamine(DA) and adrenocorticotropic(ACTH)hormone showed significant differences between accidentprone drivers and safe drivers(P_(DA)= 0.03,P_(ACTH)= 0.01).It is suggested that the accident-prone drivers may have the idiosyncrasy of susceptibility.