Tandem-based learning is a way of collaborative learning with which two different language users communicate in theirtarget language. It implies that the both learners play a role as a teacher and learner. Through suf...Tandem-based learning is a way of collaborative learning with which two different language users communicate in theirtarget language. It implies that the both learners play a role as a teacher and learner. Through sufficient cooperative duration andexposure to their target language learning, their interest and motivation of translation majors were noticeably inspired. This programis sure to be very effective for foreign language learning, if the two principles are followed: principle of reciprocity and self-initia-tive.展开更多
To improve the reliability and accuracy of the global po- sitioning system （GPS）/micro electromechanical system （MEMS）- inertial navigation system （INS） integrated navigation system, this paper proposes two diff...To improve the reliability and accuracy of the global po- sitioning system （GPS）/micro electromechanical system （MEMS）- inertial navigation system （INS） integrated navigation system, this paper proposes two different methods. Based on wavelet threshold denoising and functional coefficient autoregressive （FAR） model- ing, a combined data processing method is presented for MEMS inertial sensor, and GPS attitude information is also introduced to improve the estimation accuracy of MEMS inertial sensor errors. Then the positioning accuracy during GPS signal short outage is enhanced. To improve the positioning accuracy when a GPS signal is blocked for long time and solve the problem of the tra- ditional adaptive neuro-fuzzy inference system （ANFIS） method with poor dynamic adaptation and large calculation amount, a self-constructive ANFIS （SCANFIS） combined with the extended Kalman filter （EKF） is proposed for MEMS-INS errors modeling and predicting. Experimental road test results validate the effi- ciency of the proposed methods.展开更多
目的探讨宫腔粘连患者宫腔镜下宫腔粘连分离术(transcervical resection of adhesions,TCRA)术后应用Foley球囊+自交联透明质酸钠凝胶预防术后再粘连的临床效果。方法选取我院在2015年12月至2017年11月收治的中重度宫腔粘连患者120例,...目的探讨宫腔粘连患者宫腔镜下宫腔粘连分离术(transcervical resection of adhesions,TCRA)术后应用Foley球囊+自交联透明质酸钠凝胶预防术后再粘连的临床效果。方法选取我院在2015年12月至2017年11月收治的中重度宫腔粘连患者120例,按照随机数字表法分为观察组和对照组,每组各60例;观察组在TCRA术后应用Foley球囊+自交联透明质酸钠凝胶预防再粘连;对照组在TCRA术后应用Foley球囊+普通医用透明质酸钠凝胶预防再粘连。术后3个月观察两组患者临床疗效及AFS评分、粘连范围、粘连类型、月经状况及再粘连状况。结果治疗后观察组临床有效率为86.67%(52/60),对照组临床有效率为71.67%(43/60),比较具有统计学差异(χ2=4.093,P<0.05);术后3个月宫腔镜检查两组患者AFS总分、粘连范围评分、粘连类型及月经状况评分较术前均明显下降(P<0.05);观察组AFS总分、月经状况评分明显低于对照组,差异具有统计学意义(P<0.05);两组患者术后粘连范围、粘连类型比较差异无统计学意义(P>0.05);术后3个月宫腔镜检查,观察组术后再粘连发生率为1.92%(1/52),对照组术后再粘连发生率为16.28%(7/43),比较具有统计学差异(χ2=4.566,P<0.05)。结论宫腔粘连患者TCRA术后应用Foley球囊+自交联透明质酸钠凝胶预防粘连效果显著,能够有效降低AFS评分及月经状况,值得临床推广。展开更多
Enzyme-instructed self-assembly （EISA） offers a facile approach to explore the supramolecular assemblies of small molecules in cellular milieu for a variety of biomedical applications. One of the commonly used enzym...Enzyme-instructed self-assembly （EISA） offers a facile approach to explore the supramolecular assemblies of small molecules in cellular milieu for a variety of biomedical applications. One of the commonly used enzymes is phosphatase, but the study of the substrates of phosphatases mainly focuses on the phos- photyrosine containing peptides. In this work, we examine the EISA of phosphoserine containing small peptides for the first time by designing and synthesizing a series of precursors containing only phosphoserine or both phos- phoserine and phosphotyrosine. Conjugating a phospho- serine to the C-terminal of a well-established self- assembling peptide backbone, （naphthalene-2-1y）-acetyl- diphenylalanine （NapFF）, affords a novel hydrogelation precursor for EISA. The incorporation ofphosphotyrosine, another substrate of phosphatase, into the resulting precursor, provides one more enzymatic trigger on a single molecule, and meanwhile increases the precursors＇ propensity to aggregate after being fully dephosphorylated. Exchanging the positions of phosphorylated serine and tyrosine in the peptide backbone provides insights on how the specific molecular structures influence self-assembling behaviors of small peptides and the subsequent cellular responses. Moreover, the utilization of D-amino acids largely enhances the biostability of the peptides, thus providing a unique soft material for potential biomedical applications.展开更多
文摘Tandem-based learning is a way of collaborative learning with which two different language users communicate in theirtarget language. It implies that the both learners play a role as a teacher and learner. Through sufficient cooperative duration andexposure to their target language learning, their interest and motivation of translation majors were noticeably inspired. This programis sure to be very effective for foreign language learning, if the two principles are followed: principle of reciprocity and self-initia-tive.
基金supported by the National Natural Science Foundation of China (60902055)
文摘To improve the reliability and accuracy of the global po- sitioning system （GPS）/micro electromechanical system （MEMS）- inertial navigation system （INS） integrated navigation system, this paper proposes two different methods. Based on wavelet threshold denoising and functional coefficient autoregressive （FAR） model- ing, a combined data processing method is presented for MEMS inertial sensor, and GPS attitude information is also introduced to improve the estimation accuracy of MEMS inertial sensor errors. Then the positioning accuracy during GPS signal short outage is enhanced. To improve the positioning accuracy when a GPS signal is blocked for long time and solve the problem of the tra- ditional adaptive neuro-fuzzy inference system （ANFIS） method with poor dynamic adaptation and large calculation amount, a self-constructive ANFIS （SCANFIS） combined with the extended Kalman filter （EKF） is proposed for MEMS-INS errors modeling and predicting. Experimental road test results validate the effi- ciency of the proposed methods.
文摘目的探讨宫腔粘连患者宫腔镜下宫腔粘连分离术(transcervical resection of adhesions,TCRA)术后应用Foley球囊+自交联透明质酸钠凝胶预防术后再粘连的临床效果。方法选取我院在2015年12月至2017年11月收治的中重度宫腔粘连患者120例,按照随机数字表法分为观察组和对照组,每组各60例;观察组在TCRA术后应用Foley球囊+自交联透明质酸钠凝胶预防再粘连;对照组在TCRA术后应用Foley球囊+普通医用透明质酸钠凝胶预防再粘连。术后3个月观察两组患者临床疗效及AFS评分、粘连范围、粘连类型、月经状况及再粘连状况。结果治疗后观察组临床有效率为86.67%(52/60),对照组临床有效率为71.67%(43/60),比较具有统计学差异(χ2=4.093,P<0.05);术后3个月宫腔镜检查两组患者AFS总分、粘连范围评分、粘连类型及月经状况评分较术前均明显下降(P<0.05);观察组AFS总分、月经状况评分明显低于对照组,差异具有统计学意义(P<0.05);两组患者术后粘连范围、粘连类型比较差异无统计学意义(P>0.05);术后3个月宫腔镜检查,观察组术后再粘连发生率为1.92%(1/52),对照组术后再粘连发生率为16.28%(7/43),比较具有统计学差异(χ2=4.566,P<0.05)。结论宫腔粘连患者TCRA术后应用Foley球囊+自交联透明质酸钠凝胶预防粘连效果显著,能够有效降低AFS评分及月经状况,值得临床推广。
文摘Enzyme-instructed self-assembly （EISA） offers a facile approach to explore the supramolecular assemblies of small molecules in cellular milieu for a variety of biomedical applications. One of the commonly used enzymes is phosphatase, but the study of the substrates of phosphatases mainly focuses on the phos- photyrosine containing peptides. In this work, we examine the EISA of phosphoserine containing small peptides for the first time by designing and synthesizing a series of precursors containing only phosphoserine or both phos- phoserine and phosphotyrosine. Conjugating a phospho- serine to the C-terminal of a well-established self- assembling peptide backbone, （naphthalene-2-1y）-acetyl- diphenylalanine （NapFF）, affords a novel hydrogelation precursor for EISA. The incorporation ofphosphotyrosine, another substrate of phosphatase, into the resulting precursor, provides one more enzymatic trigger on a single molecule, and meanwhile increases the precursors＇ propensity to aggregate after being fully dephosphorylated. Exchanging the positions of phosphorylated serine and tyrosine in the peptide backbone provides insights on how the specific molecular structures influence self-assembling behaviors of small peptides and the subsequent cellular responses. Moreover, the utilization of D-amino acids largely enhances the biostability of the peptides, thus providing a unique soft material for potential biomedical applications.
