[Objective] The aim was to study the aromas composition of plum fruit. [Method] The aroma components of six kinds of plum fruits were analyzed by SPME, detected and identified by GC-MS.[Result] 85 kinds of aroma subst...[Objective] The aim was to study the aromas composition of plum fruit. [Method] The aroma components of six kinds of plum fruits were analyzed by SPME, detected and identified by GC-MS.[Result] 85 kinds of aroma substances were separated and identified, including 40 kinds of common components.The experiments had good reproducibility by strictly controlling the desorption temperature, time and sample holding time.The obtained chromatographic peak retention time and the normalized area variation coefficient CV% values were between 0.03% -0.54% and 5.85% -18.08% by experimenting the five precision of AoLi13.The qualitative and quantitative were fully meet repeatability requirements for test samples. [Conclusion] The study provided scientific basis for the development and process of plum industry in China.展开更多
This paper by analyzing the current situation and problems in China＇s current two-year vocational college English teaching system, employment-oriented focuses on developing students＇ professional competence jobs for...This paper by analyzing the current situation and problems in China＇s current two-year vocational college English teaching system, employment-oriented focuses on developing students＇ professional competence jobs for Reconstruction and innovative two-year vocational college English teaching system reform ideas, curriculum segments, curriculum construction, teaching design, teaching evalua-tion model and extracurricular teaching supplement five in-depth discussions, in order to make it more effective, science, flexibility and professional relevance, and lay a good foundation for English language students＇ future employment and real work.展开更多
In this paper, we take Tourism Vocational English for example, through the analysis of the problems and contradictions in vocational high school practice, around the vocational training objectives, make in-depth discu...In this paper, we take Tourism Vocational English for example, through the analysis of the problems and contradictions in vocational high school practice, around the vocational training objectives, make in-depth discussion of reform and innovation of graduation comprehensive practice mode from the overall design, stage promotion and process management.展开更多
In current world, with the rapid development of science and technology and emerging new and interdisciplinary science, technological progress is having extensive and profound impact on the economic and social aspects....In current world, with the rapid development of science and technology and emerging new and interdisciplinary science, technological progress is having extensive and profound impact on the economic and social aspects. Along with the wave of information technology revolution, life sciences and biotechnology are showing the developing prospect of unlimited possibilities. More and more people have foreseen the arrival of a new era of life sciences, which has important impact on science and technology development, social progress and economic growth.展开更多
This paper will analyze the identities of Sterne, his two spokesmen - Tristram and Yorick, and the reader of this novel to show their indeterminate identities and the indeterminate relationship between them.
In the multi-service requirement of the next generation of optical networks,differentiated services should be provided,and the transmission quality of signal and the path reliability are two important parameters of se...In the multi-service requirement of the next generation of optical networks,differentiated services should be provided,and the transmission quality of signal and the path reliability are two important parameters of service class differentiation.A new dynamic routing and wavelength assignment(RWA) algorithm supporting service-differentiated provision,which takes account of both requirements of the signal transmission quality and the path reliability,is proposed.The numerical results from simulation show that the algorithm can not only overcome the impact of impairment on signal transmission quality and guarantee lightpath reliability,but also offer the service-differentiated lightpath according to its class.展开更多
基金Supported by Hebei Handan Key Research Subject(2011-33)
文摘[Objective] The aim was to study the aromas composition of plum fruit. [Method] The aroma components of six kinds of plum fruits were analyzed by SPME, detected and identified by GC-MS.[Result] 85 kinds of aroma substances were separated and identified, including 40 kinds of common components.The experiments had good reproducibility by strictly controlling the desorption temperature, time and sample holding time.The obtained chromatographic peak retention time and the normalized area variation coefficient CV% values were between 0.03% -0.54% and 5.85% -18.08% by experimenting the five precision of AoLi13.The qualitative and quantitative were fully meet repeatability requirements for test samples. [Conclusion] The study provided scientific basis for the development and process of plum industry in China.
文摘This paper by analyzing the current situation and problems in China＇s current two-year vocational college English teaching system, employment-oriented focuses on developing students＇ professional competence jobs for Reconstruction and innovative two-year vocational college English teaching system reform ideas, curriculum segments, curriculum construction, teaching design, teaching evalua-tion model and extracurricular teaching supplement five in-depth discussions, in order to make it more effective, science, flexibility and professional relevance, and lay a good foundation for English language students＇ future employment and real work.
文摘In this paper, we take Tourism Vocational English for example, through the analysis of the problems and contradictions in vocational high school practice, around the vocational training objectives, make in-depth discussion of reform and innovation of graduation comprehensive practice mode from the overall design, stage promotion and process management.
文摘In current world, with the rapid development of science and technology and emerging new and interdisciplinary science, technological progress is having extensive and profound impact on the economic and social aspects. Along with the wave of information technology revolution, life sciences and biotechnology are showing the developing prospect of unlimited possibilities. More and more people have foreseen the arrival of a new era of life sciences, which has important impact on science and technology development, social progress and economic growth.
文摘This paper will analyze the identities of Sterne, his two spokesmen - Tristram and Yorick, and the reader of this novel to show their indeterminate identities and the indeterminate relationship between them.
基金supported by the National Natural Science Foundation of China (No. 60572021)the Natural Science Foundation of Hebei Province (No. F2010001045)Hebei Education Department R&D Project (No. 2008110)
文摘In the multi-service requirement of the next generation of optical networks,differentiated services should be provided,and the transmission quality of signal and the path reliability are two important parameters of service class differentiation.A new dynamic routing and wavelength assignment(RWA) algorithm supporting service-differentiated provision,which takes account of both requirements of the signal transmission quality and the path reliability,is proposed.The numerical results from simulation show that the algorithm can not only overcome the impact of impairment on signal transmission quality and guarantee lightpath reliability,but also offer the service-differentiated lightpath according to its class.
