This paper describes the design and analysis of a fully differential,gain-enhanced CMOS telescopic operational transconductance amplifier （OTA） used in a pipeline analog-to-digital converter （ADC）. Specifications ...This paper describes the design and analysis of a fully differential,gain-enhanced CMOS telescopic operational transconductance amplifier （OTA） used in a pipeline analog-to-digital converter （ADC）. Specifications of the OTA are derived from the requirements of ADC. Simulation shows that for a lpF load capacitance, this OTA achieves a high DC gain （approximately 145dB） and a wide unity-gain bandwidth （above 750MHz） at a phase margin 58°. In a configuration where the closed loop-gain is 4,the design spends about 18ns for settling with 0.05% accuracy. Simulations of this design are performed in SMIC CMOS 0.18μm technology.展开更多
目的探讨聆听-建立-应用-提高-反馈-强化(LEARNS)健康教育模式早期营养干预对妊娠期糖尿病(GDM)患者分娩结局的影响。方法选取2020年6月—2022年6月浙江中医药大学附属杭州市中医院诊治的GDM患者100例为研究对象,随机分为对照组和观察组...目的探讨聆听-建立-应用-提高-反馈-强化(LEARNS)健康教育模式早期营养干预对妊娠期糖尿病(GDM)患者分娩结局的影响。方法选取2020年6月—2022年6月浙江中医药大学附属杭州市中医院诊治的GDM患者100例为研究对象,随机分为对照组和观察组,每组各50例。对照组患者给予常规干预,观察组患者在对照组基础上采用LEARNS健康教育模式进行早期营养干预,比较两组患者BMI达标情况、血糖达标情况、健康知识了解度、治疗依从度、行为状况、情绪状况及分娩结局。结果干预后,观察组患者BMI、空腹血糖(FPG)、餐后2 h血糖(2 h PG)及糖化血红蛋白(HbA1c)达标率均高于对照组(92.00%vs.76.00%、92.00%vs.74.00%、94.00%vs.80.00%、90.00%vs.74.00%),差异均有统计学意义(χ^(2)=4.762、5.741、4.332及4.336,均P<0.05)。观察组患者健康知识了解率、治疗依从率均高于对照组(88.00%vs.66.00%、94.00%vs.76.00%),差异均有统计学意义(χ^(2)=6.832、6.353,均P<0.05)。干预后,观察组患者汉化糖尿病自我效能量表(C-DMSES)评分高于对照组,焦虑自评量表(SAS)和抑郁自评量表(SDS)评分均低于对照组[(167.24±8.92)分vs.(145.32±10.36)分、(37.16±4.65)分vs.(43.75±5.44)分、(40.15±4.57)分vs.(44.28±4.72)分],差异均有统计学意义(t=11.338、6.511及4.445,均P<0.05)。观察组患者羊水过多、早产发生率均低于对照组(2.00%vs.16.00%、6.00%vs.22.00%),巨大儿、低体质量儿及低血糖发生率均低于对照组(4.00%vs.18.00%、4.00%vs.18.00%、6.00%vs.20.00%),差异均有统计学意义(χ^(2)=5.983、5.316、5.005、5.005及4.332,均P<0.05)。结论GDM患者应用LEARNS健康教育模式进行早期营养干预,BMI和血糖获有良好控制,健康知识了解度和治疗依从度均提高,行为和情绪状况得到改善,且有利于改善母婴结局。展开更多
Set at the interface between second language acquisition and second language writing,this study examines how different types of written corrective feedback(WCF)influence the writing accuracy of Chinese college student...Set at the interface between second language acquisition and second language writing,this study examines how different types of written corrective feedback(WCF)influence the writing accuracy of Chinese college students learning English as a Foreign Language(EFL)and whether WCF facilitates the students’grasp of the focused linguistic knowledge.The participants(n=60)were divided into direct correction group(n=20),indirect error-coding group(n=20)and metalinguistic explanation group(n=20).The three groups wrote four essays in two months and received WCF for the first three essays on the five targeted error types,namely tense errors,confusion of different forms of a word,word(articles,prepositions,etc.)missing,errors in subjectverb agreement and inappropriate verb-noun collocations.The results show that all three types of WCF improved students’writing accuracy but none of them had any statistical advantage,and the metalinguistic WCF was more effective than the other two forms in facilitating the acquisition of the targeted linguistic features.These results shed some light on teaching and consolidation of language points through writing in EFL contexts.展开更多
The ability to write in English has become more and more important after China's entrance into the WTO. Unfortunately EFL writing is a headache. Error correction (revision) is still a problem which needs to be sol...The ability to write in English has become more and more important after China's entrance into the WTO. Unfortunately EFL writing is a headache. Error correction (revision) is still a problem which needs to be solved between English teachers and their students. This paper investigates what Chinese EFL college students think about their teachers feedback in regard to their writing in order to find proper and effective ways to implement error correction by the teacher.展开更多
文摘This paper describes the design and analysis of a fully differential,gain-enhanced CMOS telescopic operational transconductance amplifier （OTA） used in a pipeline analog-to-digital converter （ADC）. Specifications of the OTA are derived from the requirements of ADC. Simulation shows that for a lpF load capacitance, this OTA achieves a high DC gain （approximately 145dB） and a wide unity-gain bandwidth （above 750MHz） at a phase margin 58°. In a configuration where the closed loop-gain is 4,the design spends about 18ns for settling with 0.05% accuracy. Simulations of this design are performed in SMIC CMOS 0.18μm technology.
文摘目的探讨聆听-建立-应用-提高-反馈-强化(LEARNS)健康教育模式早期营养干预对妊娠期糖尿病(GDM)患者分娩结局的影响。方法选取2020年6月—2022年6月浙江中医药大学附属杭州市中医院诊治的GDM患者100例为研究对象,随机分为对照组和观察组,每组各50例。对照组患者给予常规干预,观察组患者在对照组基础上采用LEARNS健康教育模式进行早期营养干预,比较两组患者BMI达标情况、血糖达标情况、健康知识了解度、治疗依从度、行为状况、情绪状况及分娩结局。结果干预后,观察组患者BMI、空腹血糖(FPG)、餐后2 h血糖(2 h PG)及糖化血红蛋白(HbA1c)达标率均高于对照组(92.00%vs.76.00%、92.00%vs.74.00%、94.00%vs.80.00%、90.00%vs.74.00%),差异均有统计学意义(χ^(2)=4.762、5.741、4.332及4.336,均P<0.05)。观察组患者健康知识了解率、治疗依从率均高于对照组(88.00%vs.66.00%、94.00%vs.76.00%),差异均有统计学意义(χ^(2)=6.832、6.353,均P<0.05)。干预后,观察组患者汉化糖尿病自我效能量表(C-DMSES)评分高于对照组,焦虑自评量表(SAS)和抑郁自评量表(SDS)评分均低于对照组[(167.24±8.92)分vs.(145.32±10.36)分、(37.16±4.65)分vs.(43.75±5.44)分、(40.15±4.57)分vs.(44.28±4.72)分],差异均有统计学意义(t=11.338、6.511及4.445,均P<0.05)。观察组患者羊水过多、早产发生率均低于对照组(2.00%vs.16.00%、6.00%vs.22.00%),巨大儿、低体质量儿及低血糖发生率均低于对照组(4.00%vs.18.00%、4.00%vs.18.00%、6.00%vs.20.00%),差异均有统计学意义(χ^(2)=5.983、5.316、5.005、5.005及4.332,均P<0.05)。结论GDM患者应用LEARNS健康教育模式进行早期营养干预,BMI和血糖获有良好控制,健康知识了解度和治疗依从度均提高,行为和情绪状况得到改善,且有利于改善母婴结局。
文摘Set at the interface between second language acquisition and second language writing,this study examines how different types of written corrective feedback(WCF)influence the writing accuracy of Chinese college students learning English as a Foreign Language(EFL)and whether WCF facilitates the students’grasp of the focused linguistic knowledge.The participants(n=60)were divided into direct correction group(n=20),indirect error-coding group(n=20)and metalinguistic explanation group(n=20).The three groups wrote four essays in two months and received WCF for the first three essays on the five targeted error types,namely tense errors,confusion of different forms of a word,word(articles,prepositions,etc.)missing,errors in subjectverb agreement and inappropriate verb-noun collocations.The results show that all three types of WCF improved students’writing accuracy but none of them had any statistical advantage,and the metalinguistic WCF was more effective than the other two forms in facilitating the acquisition of the targeted linguistic features.These results shed some light on teaching and consolidation of language points through writing in EFL contexts.
文摘The ability to write in English has become more and more important after China's entrance into the WTO. Unfortunately EFL writing is a headache. Error correction (revision) is still a problem which needs to be solved between English teachers and their students. This paper investigates what Chinese EFL college students think about their teachers feedback in regard to their writing in order to find proper and effective ways to implement error correction by the teacher.
