Banach空问中一阶脉冲积分-微分方程初值问题的解

在Banach空间中讨论了混合型一阶脉冲积分-微分方程初值问题{x′=f（t,x,Tx,Sx）,A↓t∈J,t≠tk；△x｜t=tk=Ik（x（tk）,k=1,2,…,m,；x（0=x0的解，并给出了解的迭代求法．     

Infrared Absorption Spectra of Serpentine Cat＇s Eye from Sichuan Province of China

Infrared （IR） absorption spectra and X-ray powder diffraction （XRD） patterrns of sexpenfine cat＇s eye from Sichuan Province have been investigated, and infrared absorption bands of the serpentine have been assigned in this paper. The results indicate that the bands near 3 600 - 3 700 cm^-1 belong to the stretching absorption band VOH, the bands in 948 - 1 100 cm^-1 axe assigned to the stretching vibraling band Usvo, and the bands at 600 570 and 440 cm^-1 respectively belong to the bending vibration band VOH, δMg-O and δSi-O. The serpentine cat＇ s eye includes two types： chrysotile and antigorite. Chrysotile has a sharp and intensive band at 3 688 cm^-1 and a weak band at 3 643 cm^-1 , while antigorite has only one intensive band in the region. At vibration band VSi-O, chrysotile and antigorite have a similar feature at 1 071 cm^-1, but the band at 980 cm^-1 in anfigorite has been split into two bands in chrysotile - a strong one at 1 027 cm^-1 and a weak one at 949 cm^-1. In addition, antigorite has a characteristic bending vibrating band δMg-O at 570 cm^-1. Based on the analysis of the feature of crystal structure, their IR differences axe well explained.     

克芜踪对水稻种子性状的影响

在水稻中籼 898蜡熟中期进行催熟处理 ,结果表明 :每喷施 45 0kg/hm2 标准浓度的克芜踪 (Gramoxone)药液 ,可以提早收获 3天 ,对种子千粒重及发芽率无显著影响。     

Removal of Toluene by Adsorption/Desorption Using Ultra-stable Y Zeolite

The adsorption performance of toluene on ultra-stable Y zeolite(USY) was studied via dynamic adsorption. The effects of bed temperature, initial concentration, and feed flow rate on adsorption were investigated. The Yoon–Nelson model was used to fit the toluene breakthrough curves. The length of mass transfer zone was calculated based on breakthrough curves. The Langmuir–Freundlich model fit the adsorption isotherms of toluene on USY, which indicated that the surface of USY was heterogeneous. The adsorption isosteric heat calculated from adsorption isotherms ranged from 54.3 to 69.8 kJ/mol, indicating physical adsorption. The combined technique of temperature swing adsorption with vacuum swing adsorption(TVSA) exhibited excellent desorption performance, which was attributed to the low desorption activation energy. Under optimized TVSA conditions, the desorption rate of toluene reached 90.6% within 10 min. The long-term cyclic utilization results indicated that the adsorption capacity of USY was stable.     

语用失误与文化教学

英汉词汇、言语行为方式、礼貌差异和英汉价值观的冲突是跨文化交际中语用失误的主要原因,而具备相应的文化知识是克服语用失误的关键.因此,教师应合理、有效地教授知识文化和交际文化,使学生掌握所学语言的正确语用规则,培养学生的跨文化交际能力.     

强化语文教学提高学生听说读写能力探研

对学生听、说、读、写综合能力的培养,是我国现阶段语文课堂所大力提倡的教学目标。在语文教学过程中,教师要在引导学生学会"听"的基础上,进一步提高"说"的能力,并通过课内及课外的阅读不断积淀语文底蕴、夯实语文功底,进而向提高写作能力迈进。     

法律英语的语用特征

法律英语有着不同于其他英语的语用特征，正确使用与了解这些语用特征，对解决与处理现实中出现的法律问题有很大的意义。     

巧用信息技术提高音乐教学效果探讨

实现信息技术在音乐教学中的合理应用,是实现音乐教学创新的重要途径。文章结合音乐教学案例,指出教师要借助多媒体实现音乐意境的构建,要在音乐鉴赏中增强学生的音乐体验,要借助信息技术打造能动的音乐氛围,从而提高学生的音乐素养和审美能力。     

美国"基于标准的改革"研究述评

美国“基于标准的改革”作为在20世纪80年代末兴起的一项影响广泛的全国性教育改革运动,引起了学者们的研究兴趣。笔者从“基于标准的改革”的涵义、缘由、内容、效果和系统的基于标准的改革等方面对相关研究进行了述评。     

1+X证书制度下职业院校变革逻辑与推进策略

1+X证书制度旨在提升职业教育内涵建设,破解职业教育专业建设、人才培养等与社会需求脱节的难题,推动职业院校教材、教法、教师改革。梳理1+X证书制度推动职业院校变革的逻辑可以发现,1+X证书制度存在的正当性基础是要推进职业教育人才培养质量的持续提升,合法性基础是要通过1+X证书制度优化校企合作育人,同时需要特定的程序性逻辑。基于此,文章提出了从组织建设、基础建设、内容建设、实施路径与质量保证体系建设等方面实施职业院校变革的策略。