Objective： To investigate the relationship between renal function and clinical outcomes among patients with acute ST-segment elevation myocardial infamtion （ASTEMI）, who were treated with emergency percutaneous cor...Objective： To investigate the relationship between renal function and clinical outcomes among patients with acute ST-segment elevation myocardial infamtion （ASTEMI）, who were treated with emergency percutaneous coronary intervention （PCI）. Methods： 420 patients hospitalized in Peking University First Hospital, diagnosed with ASTEMI treated with emergency （PCI） from January 2001 to June 2011 were enrolled in this study. Estimated glomerular filtration rate （eGFR） was used as a measure of renal function. We compared the clinical parameters and outcomes between ASTEMI patients combined renal insufficiency and the patients with normal renal function. Results： There was a significant increase in the concentrations of fibrinogen and D-Dimer （P〈0.05） and a much higher morbidity of diabetes mellitus in the group of patients with chronic kidney disease （CKD; eGFR〈60 ml/（min-1.73 m^2）） （P〈0.01）. CKD （eGFR〈60 ml/（min.1.73 m^2）） was an independent predictor of in-hospital mortality for patients hospitalized with ASTEMI receiving PCI therapy rapidly （P=0.032, odds ratio （OR） 4.159, 95% confidence interval （CI） 1.127-15.346）. Conclusions： Renal insufficiency is an independent predictor of in-hospital mortality for patients hospitalized with ASTEMI treated with primary PCI.展开更多
Successful language learning entails two levels of competence： adequate control of the grammatical system of the target language and ability to effectively communicate in pragmatic contexts. Espoused by the mantra of...Successful language learning entails two levels of competence： adequate control of the grammatical system of the target language and ability to effectively communicate in pragmatic contexts. Espoused by the mantra of much inculcated communicative orientation in English language teaching and learning, the divination points to pedagogical trends which essentially ）ettison grammar instruction in the classroom. However, language is not merely a tool of communication but an instrument of social control, political power, and economic mobility, all of which require not only skills to ＂get your message across＂ by whatever means, but more importantly, the accurate use of and facility with language that has been codified and assessed formally by standardized tests. This paper critically examines the role of grammatical accuracy and its relation to communication in terms of social and academic functions of English and advocates a revival of currently penurious grammar instruction. Examples from both native and nonnative speakers of English are used to illustrate the interface between grammar and social and political dimensions of communication through language.展开更多
This paper addresses the stability problem for a class of switched nonlinear time varying delay systems modeled by delay differential equations. By transforming the system representation under the arrow form and using...This paper addresses the stability problem for a class of switched nonlinear time varying delay systems modeled by delay differential equations. By transforming the system representation under the arrow form and using a new constructed Lyapunov function,the aggregation techniques,the Borne-Gentina practical stability criterion associated with the properties, new delay-independent stability conditions of the considered systems are established. Compared with the existing results in this area, the obtained result is explicit, simple to use and allows us to avoid the problem of searching a common Lyapunov function. Finally, an example is provided, with numerical simulations,to demonstrate the effectiveness of the proposed method.展开更多
文摘Objective： To investigate the relationship between renal function and clinical outcomes among patients with acute ST-segment elevation myocardial infamtion （ASTEMI）, who were treated with emergency percutaneous coronary intervention （PCI）. Methods： 420 patients hospitalized in Peking University First Hospital, diagnosed with ASTEMI treated with emergency （PCI） from January 2001 to June 2011 were enrolled in this study. Estimated glomerular filtration rate （eGFR） was used as a measure of renal function. We compared the clinical parameters and outcomes between ASTEMI patients combined renal insufficiency and the patients with normal renal function. Results： There was a significant increase in the concentrations of fibrinogen and D-Dimer （P〈0.05） and a much higher morbidity of diabetes mellitus in the group of patients with chronic kidney disease （CKD; eGFR〈60 ml/（min-1.73 m^2）） （P〈0.01）. CKD （eGFR〈60 ml/（min.1.73 m^2）） was an independent predictor of in-hospital mortality for patients hospitalized with ASTEMI receiving PCI therapy rapidly （P=0.032, odds ratio （OR） 4.159, 95% confidence interval （CI） 1.127-15.346）. Conclusions： Renal insufficiency is an independent predictor of in-hospital mortality for patients hospitalized with ASTEMI treated with primary PCI.
文摘Successful language learning entails two levels of competence： adequate control of the grammatical system of the target language and ability to effectively communicate in pragmatic contexts. Espoused by the mantra of much inculcated communicative orientation in English language teaching and learning, the divination points to pedagogical trends which essentially ）ettison grammar instruction in the classroom. However, language is not merely a tool of communication but an instrument of social control, political power, and economic mobility, all of which require not only skills to ＂get your message across＂ by whatever means, but more importantly, the accurate use of and facility with language that has been codified and assessed formally by standardized tests. This paper critically examines the role of grammatical accuracy and its relation to communication in terms of social and academic functions of English and advocates a revival of currently penurious grammar instruction. Examples from both native and nonnative speakers of English are used to illustrate the interface between grammar and social and political dimensions of communication through language.
文摘This paper addresses the stability problem for a class of switched nonlinear time varying delay systems modeled by delay differential equations. By transforming the system representation under the arrow form and using a new constructed Lyapunov function,the aggregation techniques,the Borne-Gentina practical stability criterion associated with the properties, new delay-independent stability conditions of the considered systems are established. Compared with the existing results in this area, the obtained result is explicit, simple to use and allows us to avoid the problem of searching a common Lyapunov function. Finally, an example is provided, with numerical simulations,to demonstrate the effectiveness of the proposed method.
