Based on the reliability theory in language testing,this study analyzes the midterm English test of a first grade class in Hangzhou using SPSS software.We will analyze the overall structure and reliability of the test...Based on the reliability theory in language testing,this study analyzes the midterm English test of a first grade class in Hangzhou using SPSS software.We will analyze the overall structure and reliability of the test paper,and use cloze as a representative of objective questions to calculate their difficulty and discrimination,in order to explore the quality of the questions and the mastery of the knowledge learned by students.The purpose of this analysis and research is to improve the quality of exam questions and help teachers get useful information from exam results,thereby improving teaching quality.展开更多
After Democrats recaptured control of the US House at the 2018 midterms,the ramifications for American domestic and foreign policies have included increased partisan checks on President Donald Trump's proposals fo...After Democrats recaptured control of the US House at the 2018 midterms,the ramifications for American domestic and foreign policies have included increased partisan checks on President Donald Trump's proposals for immigration,energy,pollution,taxes,healthcare,and social welfare,and on the Republican Party's conservative agenda overall.After the longest government shutdown in US history over funding for a border wall to keep out illegal immigrants,Trump declared a national emergency in February 2019.Under his administration,US trade pacts with China,Mexico,Canada,Japan,the EU and other countries also face uncertainty.The Indo?Pacific Strategy and relations with Russia and Europe will remain,as is.Yet even if Sino-US trade negotiations progress,bilateral friction over high technology and cultural exchange will likely increase,and disputes over Taiwan,the South China Sea and human rights will continue.展开更多
A novel renewable energy intermittency model and a new midterm dynamic simulation tool in power systems are developed for examining dynamic behavior along the load curve for different combinations of the system operat...A novel renewable energy intermittency model and a new midterm dynamic simulation tool in power systems are developed for examining dynamic behavior along the load curve for different combinations of the system operation reserves and renewable portfolio standard(RPS)rates.The system’s import limits are considered.It is concluded that ignoring intermittency and governor effects is an inadequate method to assess intermittency impact.The intermittency midterm dynamic impact must be studied.For the studied system,the instability is expected to be about 25%RPS with current reserves.Besides,the most vulnerable peak hour to instability is the afternoon peak hour when solar begins to drop off.This article stimulates further dynamic intermittency studies on the issues caused by renewable intermittency.The studies on the issues caused by renewable intermittency have not been revealed because of inadequate/incomprehensive study methodologies so that effective,mitigative solutions can be developed to guarantee the reliability of power grid when incorporating higher RPS if high operation reserves are impractical.展开更多
目的比较旋前方肌的缝合与否对桡骨远端骨折内固定疗效的中期影响。方法两组独立手术医师组,A组对桡骨远端骨折采用切开复位钢板内固定后,不予以缝合旋前方肌;B组对桡骨远端骨折钢板内固定后,仔细修补缝合旋前方肌;共随机回顾性选取30...目的比较旋前方肌的缝合与否对桡骨远端骨折内固定疗效的中期影响。方法两组独立手术医师组,A组对桡骨远端骨折采用切开复位钢板内固定后,不予以缝合旋前方肌;B组对桡骨远端骨折钢板内固定后,仔细修补缝合旋前方肌;共随机回顾性选取30例患者,15例为一组,均为AO B型骨折。分别在术后4周、6个月比较健侧与患侧的腕关节旋前、旋后功能以及上肢功能评分(disability of arm-shoulder-hand,DASH)。结果术后4周,患侧的旋前旋后功能较健侧有极显著性差异(P<0.01);AB两组患侧组内旋前有显著性差异(P<0.05),旋后无显著性差异(P>0.05);术后6个月,患侧的旋前旋后功能较健侧无显著性差异(P>0.05);AB两组患侧组内旋前以及旋后均无显著性差异(P>0.05);术后4周,AB两组组间DASH评分具有显著性差异(P<0.05);术后6个月,AB两组组间DASH评分无明显差异(P>0.05)。结论旋前方肌对桡骨远端骨折切开复位内固定的中期疗效无明显影响,手术内固定对桡骨远端B型骨折可取得良好的中期疗效。展开更多
文摘Based on the reliability theory in language testing,this study analyzes the midterm English test of a first grade class in Hangzhou using SPSS software.We will analyze the overall structure and reliability of the test paper,and use cloze as a representative of objective questions to calculate their difficulty and discrimination,in order to explore the quality of the questions and the mastery of the knowledge learned by students.The purpose of this analysis and research is to improve the quality of exam questions and help teachers get useful information from exam results,thereby improving teaching quality.
文摘After Democrats recaptured control of the US House at the 2018 midterms,the ramifications for American domestic and foreign policies have included increased partisan checks on President Donald Trump's proposals for immigration,energy,pollution,taxes,healthcare,and social welfare,and on the Republican Party's conservative agenda overall.After the longest government shutdown in US history over funding for a border wall to keep out illegal immigrants,Trump declared a national emergency in February 2019.Under his administration,US trade pacts with China,Mexico,Canada,Japan,the EU and other countries also face uncertainty.The Indo?Pacific Strategy and relations with Russia and Europe will remain,as is.Yet even if Sino-US trade negotiations progress,bilateral friction over high technology and cultural exchange will likely increase,and disputes over Taiwan,the South China Sea and human rights will continue.
文摘A novel renewable energy intermittency model and a new midterm dynamic simulation tool in power systems are developed for examining dynamic behavior along the load curve for different combinations of the system operation reserves and renewable portfolio standard(RPS)rates.The system’s import limits are considered.It is concluded that ignoring intermittency and governor effects is an inadequate method to assess intermittency impact.The intermittency midterm dynamic impact must be studied.For the studied system,the instability is expected to be about 25%RPS with current reserves.Besides,the most vulnerable peak hour to instability is the afternoon peak hour when solar begins to drop off.This article stimulates further dynamic intermittency studies on the issues caused by renewable intermittency.The studies on the issues caused by renewable intermittency have not been revealed because of inadequate/incomprehensive study methodologies so that effective,mitigative solutions can be developed to guarantee the reliability of power grid when incorporating higher RPS if high operation reserves are impractical.
文摘目的比较旋前方肌的缝合与否对桡骨远端骨折内固定疗效的中期影响。方法两组独立手术医师组,A组对桡骨远端骨折采用切开复位钢板内固定后,不予以缝合旋前方肌;B组对桡骨远端骨折钢板内固定后,仔细修补缝合旋前方肌;共随机回顾性选取30例患者,15例为一组,均为AO B型骨折。分别在术后4周、6个月比较健侧与患侧的腕关节旋前、旋后功能以及上肢功能评分(disability of arm-shoulder-hand,DASH)。结果术后4周,患侧的旋前旋后功能较健侧有极显著性差异(P<0.01);AB两组患侧组内旋前有显著性差异(P<0.05),旋后无显著性差异(P>0.05);术后6个月,患侧的旋前旋后功能较健侧无显著性差异(P>0.05);AB两组患侧组内旋前以及旋后均无显著性差异(P>0.05);术后4周,AB两组组间DASH评分具有显著性差异(P<0.05);术后6个月,AB两组组间DASH评分无明显差异(P>0.05)。结论旋前方肌对桡骨远端骨折切开复位内固定的中期疗效无明显影响,手术内固定对桡骨远端B型骨折可取得良好的中期疗效。
