Western Culture Teaching in Higher Vocational College English Course

Culture learning has been more and more important to the English learners since the cross-cultural communication hasbecoming much more rapid due to globalization.Therefore,the college teachers should pay higher attention to culture teaching inthe English teaching.This essay will discuss the importance of culture teaching as well as how to effectively input culture into high-er vocational English teaching.

Discussion and Application of Presentation Teaching Method in Higher Vocational English Teaching

Explain the implementation of presentation teaching methods in English teaching in higher vocational education and its effects.Summarize the principles and operation skills that should be followed in the application of Presentation teaching methods in higher vocational English teaching.

Research on the Reform of English Teaching Strategies in Higher Voca⁃ tional Colleges under the Belt and Road Initiative

With the development of economic globalization and the implementation of the Belt and Road Economic Development Strategy,China's foreign economic exchanges will become more frequent,and the demand for English professionals will also in⁃crease.Judging from the current situation of English teaching in higher vocational education,higher vocational English education in our country cannot meet the needs of social development.It is necessary to proceed from the actual situation.While strengthen⁃ing the education of students'basic knowledge of English,they should also train students'practical application ability and culti⁃vate for the society.More talents are available to meet the needs of social development.

Culture Acquisition in Vocational English Teaching

Cultural acquisition in English teaching is not only the objective demand of the times but also the subjective demand of the students.In order to realize the goals of strengthening the students'cultural acquisition,on one hand,teachers should play a leading role in their teaching work by means of extending the meanings of words;on the other hand,they should obey the teaching principles of cultural comparision,appropriateness to the students'abilities and combination of activities in and outside classroom.

Kinetics study on leaching of rare earth and aluminum from polishing powder waste using hydrochloric acid

In this study,a novel hydrometallurgical process consisting of hydrochloric acid three-stage countercurrent leaching and solvent extraction was proposed to recover rare earth oxide(REO)from the rare earth polishing powder waste(REPPW).The effects of HCl concentration,liquid-solid ratio(L/S ratio),temperature and time on the leaching yields of rare earths(in REO)and aluminum(in Al2O3)were studied.The result shows that the leaching yields of REO and Al2O3 are 90.96%and 43.89%respectively under the optimum leaching parameters of HCl concentration=8.00 mol/L,L/S ratio=4 mL/g,leaching temperature=353 K and leaching time=180 min.Meanwhile,the leaching kinetics of REO and Al2O3 were investigated in this study.The leaching behaviors of REO and Al2O3 follow a shrinking sphere/core model and the general leaching process is controlled by the surface chemical reaction.The leaching activation energies of REO and Al2O3 are 9.86 and 13.68 kJ/mol,respectively.The leaching yield of each substance in three-stage countercurrent leaching is improved substantially compared with single-stage leaching,with a change from 90.96%to 95.38%for REO and from 43.89%to 46.22%for Al2O3,respectively.Especially,the total concentration of REO in three-stage countercurrent leaching solution is greatly increased to above 300 g/L,and the acidity of which is decreased to ca.pH=2,which is conducive to subsequent solvent extraction directly.High purity REO(99.92%)is obtained by solvent extraction separation,oxalate precipitation and calcination.The total recovery yield of REO is 85.13%.

Characterizing model uncertainty of upper-bound limit analysis on slopes using 3D rotational failure mechanism

The slope stability assessment is a classical problem in geotechnical engineering.This topic have attracted many researcher’s attention and various theoretical models for predicting critical slope heights or safety factors in the light of the limit equilibrium(LE)method and the kinematical approach of limit analysis(LA)method.Meanwhile,a large number of experimental studies have been conducted to check the slope stability.Using centrifuge testing results,this paper aims to employ Bayesian method to characterize the model uncertainties of the classical three-dimensional rotational failure mechanism proposed by Michalowski and Drescher(2009)to predict critical slope heights in frictional soils,by incorporating the test uncertainties and parameter uncertainties.The obtained results show that the LA three-dimensional rotational failure mechanism overestimates the critical slope height compared with the LE method,and the experimental observational uncertainty has negligible influences on the posterior statistics of model uncertainty.