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Speak Up! Fostering Oral Communication in the English Classroom Through Dialogic Musical Meetings 预览
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作者 Judit Palencia Gutiérrez 《中美英语教学:英文版》 2019年第4期143-151,共9页
This study, carried out in Spain in 2016, proposes new dialogical pedagogy techniques based on deeply rooted in constructivism to improve the level of English education in Spanish high schools. Spain is the second wor... This study, carried out in Spain in 2016, proposes new dialogical pedagogy techniques based on deeply rooted in constructivism to improve the level of English education in Spanish high schools. Spain is the second worst country in the European Union when it comes to English command, especially with regards to oral output, as a consequence of several factors, such as the deficient preparation of teachers, cuts in the education budget or dubbed films. This paper will present the outcomes of a Second Language Acquisition innovation project carried out in the North of Spain. After analyzing data collected to study their low command of the language, the participants, more than 20 students from the Spanish equivalent for US high school 10th grade, performed tasks that prepared them with insight and training to then participate in a musical meeting, where they, without the intervention of the teacher, listened to English music and discussed in the targeted language about some songs and their lyrics. These meetings were recorded to posteriori analysis with the students. 展开更多
关键词 Second Language Acquisition oral COMPETENCE English instruction DIALOGIC learning
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中孕期使用子宫颈托对双胎妊娠孕妇早产预防的系统评价 预览
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作者 徐婷婷 周芷伊 +4 位作者 刘娜 邓春燕 黄桂琼 王晓东 余海燕 《中华妇幼临床医学杂志(电子版)》 CAS 2019年第3期253-261,共9页
目的系统评价双胎孕妇中孕期使用子宫颈托预防双胎妊娠发生早产的有效性。方法计算机检索相关文献数据库中,关于双胎孕妇中孕期使用子宫颈托预防双胎妊娠发生早产的相关文献。其中,英文数据库包括:Embase、PubMed、Cochrane Central Reg... 目的系统评价双胎孕妇中孕期使用子宫颈托预防双胎妊娠发生早产的有效性。方法计算机检索相关文献数据库中,关于双胎孕妇中孕期使用子宫颈托预防双胎妊娠发生早产的相关文献。其中,英文数据库包括:Embase、PubMed、Cochrane Central Register of Controlled Trials (CCRT)、Cochrane Database of Systematic Reviews、Ovid-Medline及 American College of Physicians (ACP)等;中文数据库包括:中国生物医学文献数据库(CBM)、中国期刊全文数据库(CNKI)、维普(VIP)和万方数据库。此外,手工检索相关会议资料、论文集及学位论文汇编等。检索时间设定为自数据库建库至2018年1月,检索内容为双胎孕妇中孕期使用子宫颈托预防双胎妊娠发生早产的随机对照试验(RCT)。采用Cochrane系统评价法,对检索文献进行质量评价和Meta分析,参照系统综述和Meta分析优先报告的条目(PRISMA)报告规范进行报告。各研究间的异质性采用 I 2检验,若 I 2≤ 50%,则采用固定效应模型Meta分析;若 I 2>50%,则采用随机效应模型Meta分析。采用Mantel-Haenszel法评估 RR 值及其95% CI 。结果①通过相关文献检索,共计5篇RCT文献符合本研究纳入标准与排除标准,涉及2 465例双胎妊娠孕妇,其中宫颈长度(CL)缩短双胎妊娠孕妇为827例。②对纳入文献的方法学质量评价结果显示,纳入文献质量为中等质量文献。③对纳入的双胎孕妇中孕期使用子宫颈托的双胎妊娠预防早产主要/次要指标的Meta分析结果示,中孕期使用子宫颈托,可明显降低中孕期双胎妊娠者分娩新生儿的新生儿重症监护病房(NICU)治疗率( RR =0.73,95% CI :0.53~1.00, P =0.05),但是增加了双胎孕妇的阴道排液发生率( RR =3.07,95% CI :1.29~7.30, P =0.01)和早产儿视网膜病变(ROP)发生率( RR =3.85,95% CI :1.19~12.45, P =0.02)。对中孕期双胎妊娠合并CL缩短孕妇的亚组Meta分析结果显示,中孕期CL<38 mm双胎妊娠孕妇使用子宫� 展开更多
关键词 子宫托 子宫颈 妊娠中期 双胎妊娠 宫颈长度测量 系统评价 妊娠结局 孕妇
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新产程标准下剖宫产后阴道试产239例妊娠结局 预览
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作者 刘兰 王金莲 +2 位作者 张立敏 王勇娟 赵永隆 《安徽医药》 CAS 2019年第5期939-941,共3页
目的探讨新产程标准下剖宫产术后再次妊娠阴道分娩(VBAC)孕妇的妊娠结局。方法对照组108例VBAC产妇采用Friedman产程标准;观察组为239例VBAC产妇,采用新产程标准。回顾并分析两组产妇相关临床资料,比较两组分娩情况、产程时间、产时干... 目的探讨新产程标准下剖宫产术后再次妊娠阴道分娩(VBAC)孕妇的妊娠结局。方法对照组108例VBAC产妇采用Friedman产程标准;观察组为239例VBAC产妇,采用新产程标准。回顾并分析两组产妇相关临床资料,比较两组分娩情况、产程时间、产时干预措施、分娩并发症和新生儿结局差异。结果观察组自然分娩率73.2%,妊娠中转剖宫产24.3%;对照组自然分娩率61.1%,妊娠中转剖宫产37.0%,两组比较差异有统计学意义(P<0.05)。与对照组比较观察组妊娠活跃期时间明显缩短(P<0.001),第一、第二产程时间明显延长(P<0.001)。观察组缩宫素使用、人工破膜、地西泮使用均显著低于对照组(P<0.05)。两组在产后并发症及新生儿不良结局方面比较差异无统计学意义(P>0.05)。结论新产程标准放宽了第一、第二产程,使VBAC产妇充分试产,降低了剖宫产率,减少产程中医疗干预,且并未影响围产结局。 展开更多
关键词 剖宫产后阴道分娩 指南 试分娩 自然分娩 产程 第一 产程 第二 产程 第三 缩宫素 妊娠结局
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中孕期孕妇的碘营养状态对心脏电信号的影响 预览
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作者 于海华 宫建 +2 位作者 王国峰 于嵩 唐燕妮 《中华妇幼临床医学杂志(电子版)》 CAS 2019年第1期8-13,共6页
目的探讨中孕期孕妇碘营养状态对其心脏电信号的影响。方法2015年7月至2017年7月,采取方便抽样法,于山东省海阳市某2家二级医院,选取1600例中孕期孕妇为研究对象,纳入观察组。按照年龄匹配原则,采取同样的方法,选择同期在这2家医院进行... 目的探讨中孕期孕妇碘营养状态对其心脏电信号的影响。方法2015年7月至2017年7月,采取方便抽样法,于山东省海阳市某2家二级医院,选取1600例中孕期孕妇为研究对象,纳入观察组。按照年龄匹配原则,采取同样的方法,选择同期在这2家医院进行健康体检,碘含量检测结果正常的非妊娠女性800例,纳入对照组(C组)。对观察组受试者进行尿碘含量检测,同时对观察组及C组受试者进行心电图检查。根据观察组中孕期孕妇碘含量检测结果,将其分为碘营养缺乏亚组(G1亚组),碘营养过量亚组(G2亚组)和碘营养正常亚组(G3亚组)。对于观察组3个亚组与C组的心电图检查结果正常和大致正常率、窦性心律不齐等异常结果发生率的比较,采用χ2检验,进一步两两比较,采用调整检验水准后进行比较。本研究遵循的程序符合2013年修订的《世界医学协会赫尔辛基宣言》的要求。本研究分组,均征得受试者本人的知情同意,并签署临床研究知情同意书。结果①观察组进一步分组及组间一般临床资料比较结果:观察组中,G1、G2及G3亚组孕妇分别为502、179及919例。观察组3个亚组孕妇的年龄、孕龄分别总体比较,差异均无统计学意义(P>0.05)。这3个亚组孕妇与C组受试者年龄总体比较,差异亦无统计学意义(P>0.05)。②心电图检查结果正常和大致正常率比较:观察组3个亚组与C组总体比较,差异有统计学意义(χ2=79.889,P<0.001);G1与G2亚组孕妇心电图正常和大致正常率分别为72.71%(365/502)与70.95%(127/179),均显著低于G3亚组(86.51%,795/919)与C组(88.25%,706/800),并且差异均有统计学意义(均为P<0.001)。③G1、G2及G3亚组孕妇心电图检查异常结果中,窦性心律不齐发生率最高。G1、G2及G3亚组与C组窦性心动过缓、窦性心动过速、窦性心律不齐、室性早搏、短P-R间期、ST-T改变发生率分别整体比较,差异均有统计学意义(χ2=38.423 展开更多
关键词 甲状腺功能减退症 心脏电生理学 心电描记术 妊娠中期 妊娠结局 临床对照试验 孕妇
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胎盘前置状态孕妇中孕期引产的研究进展 预览
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作者 魏璐 罗剑儒 +3 位作者 杨霄 邓洪 刘颖 刘兴会 《中华妇幼临床医学杂志(电子版)》 CAS 2019年第2期222-227,共6页
胎盘前置状态作为前置胎盘的早期征象,病因迄今尚不明确,其转归情况复杂,治疗难度较大。胎盘前置状态孕妇中孕期因各种原因要求引产时,临床处理较为棘手。笔者拟就胎盘前置状态的病因、产前诊断方法,以及胎盘前置状态孕妇中孕期引产措... 胎盘前置状态作为前置胎盘的早期征象,病因迄今尚不明确,其转归情况复杂,治疗难度较大。胎盘前置状态孕妇中孕期因各种原因要求引产时,临床处理较为棘手。笔者拟就胎盘前置状态的病因、产前诊断方法,以及胎盘前置状态孕妇中孕期引产措施的最新研究进展进行综述,旨在为胎盘前置状态孕妇中孕期引产时,临床医师准确评估其病情严重程度,采取最佳个体化策略,保护其生育功能,而将母体损伤降至最低提供依据。 展开更多
关键词 妊娠中期 胎盘前置状态 引产 个体化医学 生育力 危险因素 妊娠并发症 孕妇
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Value of α-fetoprotein,β-HCG, inhibin A, and UE3 at second trimester for earlyscreening of preeclampsia
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作者 Farah Farzaneh Mohaddeseh Sharifi +1 位作者 Nasim Nourinasab Sarang Younesi 《亚太生殖杂志(英文版)》 2019年第1期30-33,共4页
Objective: To study the value ofα-fetoprotein (α-FP),β-human chorionic gonadotropin (β-HCG), inhibin A, and uncojugated estriol (UE3) at the second trimester for early screening of preeclampsia. Methods: This coho... Objective: To study the value ofα-fetoprotein (α-FP),β-human chorionic gonadotropin (β-HCG), inhibin A, and uncojugated estriol (UE3) at the second trimester for early screening of preeclampsia. Methods: This cohort study was performed on 1713 consecutive pregnant women with gestational age from 15 to 18 weeks. We measured the serum levels ofα-FP, β-HCG, inhibin A, and UE3 and they were followed-up for 48 h after delivery. Results: A total of 1713 women were recruited and through the study 151 women (8.8%) were diagnosed with preeclampsia (n=123, 21.5% in the pregnant women with high risk, n=28, 2.5% in the pregnant women with low risk;P<0.0001). The area under receiver operating characteristic curve was estimated to be 2.39 MOM forα-FP, 2.84 MOM forβ-HCG, 1.92 MOM for inhibin A, and 0.77 MOM for UE3. The best cutoff value was specifically considered for each marker that was determined a positive predictive value ranged 19.60% forα-FP, 17.62% for β-HCG, 18.33% for inhibin A and 14.88% for UE3, a negative predictive value ranged 95.63% for α-FP, 93.89% for β-HCG, 94.28% for inhibin A and 93.57% for UE3, and an area under receiver operating characteristic curve ranged 0.70 forα-FP, 0.63 forβ-HCG, 0.65 for inhibin A and 0.61 for UE3. Conclusions: This study reveals that the new cutoff values are more valuable in screening preeclampsia. Although these markers have a low positive predictive value, they present a high negative predictive value. Also, the combination ofα-FP,β-HCG and inhibin A and the combination ofα-FP and inhibin A have the highest value in screening preeclampsia. 展开更多
关键词 PREECLAMPSIA SCREENING SECOND trimester Biomarkers
12例双胎妊娠中孕期选择性减胎治疗临床分析 预览
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作者 徐玉萍 姜小花 +5 位作者 袁静 方慧琴 杨梦楠 邢琼 魏兆莲 曹云霞 《国际生殖健康/计划生育杂志》 CAS 2019年第4期279-282,共4页
探讨双胎妊娠中孕期选择性减胎治疗的安全性、有效性及其影响因素。12例双胎妊娠患者因在中孕期发现其中一个胎儿存在结构或染色体异常而行选择性减胎治疗。回顾性分析12例患者选择性减胎手术情况、术后妊娠期并发症、产科结局及新生儿... 探讨双胎妊娠中孕期选择性减胎治疗的安全性、有效性及其影响因素。12例双胎妊娠患者因在中孕期发现其中一个胎儿存在结构或染色体异常而行选择性减胎治疗。回顾性分析12例患者选择性减胎手术情况、术后妊娠期并发症、产科结局及新生儿情况。12例患者均在中孕期成功减胎。其中4例足月分娩,3例早产,1例晚期流产、胎儿存活,1例流产,3例持续妊娠中;8例已分娩患者(剖宫产3例,阴道分娩5例)平均分娩孕周为34+1周,新生儿平均出生体质量(2 290.00±963.52)g,新生儿平均出生身长(44.88±6.01)cm,8例出生新生儿均未见缺陷。中孕期选择性减胎术对异常胎儿与正常胎儿并存的双胎妊娠是一种安全的治疗手段,可以有效地降低母胎并发症、防止先天性缺陷儿出生。 展开更多
关键词 妊娠 双胎 妊娠减少 多胎 妊娠中期 先天畸形
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Tsingshan Industry Becoming The Second Largest Nickel Metal Manufacturer In The World
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《中国有色金属月刊:英文版》 2019年第3期13-14,共2页
Tsingshan Industry is a leading stainless steel enterprise in China and the whole world.Its sales revenue achieved RMB 226.5 billion in 2018,presenting a YOY growth of 40%;profit and tax achieved RMB 16.1 billion,pres... Tsingshan Industry is a leading stainless steel enterprise in China and the whole world.Its sales revenue achieved RMB 226.5 billion in 2018,presenting a YOY growth of 40%;profit and tax achieved RMB 16.1 billion,presenting a YOY growth of 33%.Tsingshan Industry is the first enterprise from Wenzhou that achieved annual sales revenue of over RMB 200 billion.Tsingshan Industry persists in enlarging and improving high-quality capacity。 展开更多
关键词 Tsingshan INDUSTRY SECOND LARGEST NICKEL METAL MANUFACTURER
pH-sensitive and biodegradable charge-transfer nanocomplex for second near-infrared photoacoustic tumor imaging
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作者 Zhimin Wang Paul Kumar Upputuri +11 位作者 Xu Zhen Ruochong Zhang Yuyan Jiang Xiangzhao Ai Zhijun Zhang Ming Hu Zhenyu Meng Yunpeng Lu Yuanjing Zheng Kanyi Pu Manojit Pramanik Bengang Xing 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第1期49-55,共7页
The emerging technique of photoacoustic imaging,especially in the near infra-red(NIR)window,permits high resolution,deep-penetration,clinically reliable sensing.However,few contrast agents are available that can speci... The emerging technique of photoacoustic imaging,especially in the near infra-red(NIR)window,permits high resolution,deep-penetration,clinically reliable sensing.However,few contrast agents are available that can specifically respond to intricate biological environments,and which are biodegradable and biocompatible.Herein,we in troduce a new class of pH-sensitive orga nic photoacoustic con trast age nt that operates in the second NIR window(NIR-II,960-1,700 nm),which is derived from the self-assembled charge-transfer nanocomplex(CTN)by 3,3',5,5'-tetramethylbenzidine(TMB)and its dication structure(TMB++).The unique NIR-ll-responsive CTN can specifically respond to pH change in the physiological range and allows noninvasive and sensitive visualization of the tumor acidic microenvironment(e.g.at pH5)in mice with higher signal-to-noise ratio.The CTN is biodegradable under physiological conditions(e.g.pH 7.4),which alleviates the biosafety concern of nan oparticle accumulati on in vivo.These results clearly show the pote ntial of the TMB/TMB++-based CTN as a promisi ng pH-activated and biodegradable molecular probe for specific tumor photoacoustic imaging in the NIR-II region. 展开更多
关键词 CHARGE-TRANSFER nanocomplex SECOND NEAR-INFRARED window PHOTOACOUSTIC imaging PH-SENSITIVE BIODEGRADABLE tumor acidic microenvironment
Intercultural Competence Development of Chinese Students After a Short-Term Study Abroad Experience 预览
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作者 Shuangmei Gao Teresa J. Kennedy 《中美英语教学:英文版》 2019年第5期177-196,共20页
This study investigated Chinese students’ intercultural competence and linguistic growth during a six-week study abroad program. The students and their professor participated in pre- and post-tests covering written a... This study investigated Chinese students’ intercultural competence and linguistic growth during a six-week study abroad program. The students and their professor participated in pre- and post-tests covering written and oral language competency as well as intercultural competence. The Global Scale of English assessed student language development to determine linguistic growth and the Assessment of Intercultural Competence of Chinese College Students (AIC-CCS) was used to determine student growth of intercultural competence skills, specifically related to cultural knowledge, skills, attitudes, and awareness as a result of their experiences in a non-Western context. Results indicated that students experienced a change in the salience of intercultural knowledge themes over their period abroad, as well as improved their individual language abilities. This study provides suggestions for future programming focused on the development of Chinese student intercultural competencies during short-term study abroad experiences in Western university environments. 展开更多
关键词 ENGLISH LANGUAGE development linguistic growth Global Scale of ENGLISH second LANGUAGE (L2) INTERCULTURAL COMMUNICATIVE competence (ICC) CHINESE college students CHINESE context
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Integrative and Instrumental Motivational Orientations of English Language Learning 预览
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作者 杨忱翯 《海外英语》 2019年第8期98-99,共2页
As a key predictor of learners’language achievement,motivation has long been an active research area in second language acquisition.Among assorted theories,Gardner’s perspective is one of the foundations of L2 motiv... As a key predictor of learners’language achievement,motivation has long been an active research area in second language acquisition.Among assorted theories,Gardner’s perspective is one of the foundations of L2 motivation research and thus has dominated this field for a long time.Do?rnye later put forward the L2 Motivational Self System to reconceptualise Gardner’s notions.The current essay attempts to reflect on the concepts of integrative and instrumental motivational orientations discussed in both Gardner’s and Dornyei’s theoretical frameworks in order to gain a subtler understanding of the role of these two notions in L2 motivation. 展开更多
关键词 motivational ORIENTATIONS English LEARNING SECOND LANGUAGE ACQUISITION
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分位数回归模型再认识新产程共识下的硬膜外分娩镇痛:前瞻性队列研究
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作者 查莹 杨成武 +7 位作者 韩东吉 龚洵 乔福元 罗爱林 万里 冯玲 邓东锐 刘海意 《中华围产医学杂志》 CAS CSCD 北大核心 2019年第2期97-105,共9页
目的应用分位数回归模型探究新产程共识指导下的硬膜外分娩镇痛对产程的影响。方法前瞻性纳入2018年5月至9月于华中科技大学同济医学院附属同济医院妇产科住院分娩的300例初产妇,依据是否愿意并实际接受硬膜外药物镇痛分为镇痛组(150例... 目的应用分位数回归模型探究新产程共识指导下的硬膜外分娩镇痛对产程的影响。方法前瞻性纳入2018年5月至9月于华中科技大学同济医学院附属同济医院妇产科住院分娩的300例初产妇,依据是否愿意并实际接受硬膜外药物镇痛分为镇痛组(150例)和对照组(150例)。采用Student'st检验、Mann-WhitneyU检验、χ^2检验或Fisher精确概率法比较2组产妇的产程时长以及分娩结局,并应用分位数回归模型探究硬膜外镇痛对产程时长的影响。结果镇痛组产妇第一、二产程时长[M(P25~P75)]分别为600(400~840)和66(45~98)min,均长于对照组[分别为420(320~610)和52(33~87)min],差异均有统计学意义(Z=-4.273,P<0.001;Z=-3.210,P=0.001)。产程时长的分位数回归分析显示,硬膜外镇痛与第一产程延长有关,且在第一产程时长的各百分位数上均有显著作用,随产程时长百分位数增加(P10~P90),回归系数相应增加(95.630~285.000),差异均有统计学意义(P值均<0.05)。硬膜外镇痛仅在第二产程时长的P25~P75表现出显著的延长作用(回归系数10.000~18.143),差异有统计学意义(P值均<0.05)。镇痛组会阴侧切率(阴道分娩者)[46.8%(65/139)与33.3%(48/144),χ^2=5.318,P=0.021])、产程中导尿次数[1(0~1)与0(0~1)次,Z=-0.974,P=0.001]以及使用缩宫素的比例[48.7%(73/150)与30.0%(45/150),χ^2=10.952,P=0.001]均高于对照组;但2组剖宫产率、器械助产率以及新生儿结局差异均无统计学意义(P值均>0.05)。结论硬膜外镇痛与第一产程和第二产程延长有关,其与第一产程延长的关系更为显著,但镇痛对母儿结局无不良影响。 展开更多
关键词 分娩 产道 麻醉 硬膜外 产程 第一 产程 第二 回归分析 前瞻性研究
A new semi-tensor product of matrices
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作者 Daizhan CHENG Zequn LIU 《控制理论与技术:英文版》 EI CSCD 2019年第1期4-12,共9页
A new matrix product, called the second semi-tensor product (STP-Ⅱ) of matrices is proposed. It is similar to the classical semi-tensor product (STP-I). First, its fundamental properties are presented. Then, the equi... A new matrix product, called the second semi-tensor product (STP-Ⅱ) of matrices is proposed. It is similar to the classical semi-tensor product (STP-I). First, its fundamental properties are presented. Then, the equivalence relation caused by STP-II is obtained. Using this equivalence, a quotient space is also obtained. Finally, the vector space structure, the metric and the metric topology, the projection and subspaces, etc. of the quotient space are investigated in detail. 展开更多
关键词 SECOND sime-tensor product (STP-Ⅱ) EQUIVALENCE class QUOTIENT space TOPOLOGY METRIC
AN INSTITUTIONALIZED GUARANTEE
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作者 Nie Pingxiang 《北京周报:英文版》 2019年第13期16-17,共2页
On March 15, the Second Session of the 13th National People's Congress, China's top legislature, adopted the country's first Foreign Investment Law to promote, protect and man age foreign investment in the... On March 15, the Second Session of the 13th National People's Congress, China's top legislature, adopted the country's first Foreign Investment Law to promote, protect and man age foreign investment in the changed circumstances. The new law, which will take effect on January 1, 2020, is expected to enhance the confidence of foreign-funded enterprises in China. 展开更多
关键词 INSTITUTIONALIZED GUARANTEE SECOND SESSION China's TOP LEGISLATURE
Degeneracy and Finiteness Theorems for Meromorphic Mappings in Several Complex Variables
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作者 Si Duc QUANG 《数学年刊:B辑英文版》 SCIE CSCD 2019年第2期251-272,共22页
The author proves that there are at most two meromorphic mappings of C~m into P~n(C)(n ≥ 2) sharing 2 n+ 2 hyperplanes in general position regardless of multiplicity,where all zeros with multiplicities more than cert... The author proves that there are at most two meromorphic mappings of C~m into P~n(C)(n ≥ 2) sharing 2 n+ 2 hyperplanes in general position regardless of multiplicity,where all zeros with multiplicities more than certain values do not need to be counted. He also shows that if three meromorphic mappings f~1, f~2, f~3 of Cminto P~n(C)(n ≥ 5) share2 n+1 hyperplanes in general position with truncated multiplicity, then the map f~1×f~2×f~3 is linearly degenerate. 展开更多
关键词 Second main theorem UNIQUENESS problem MEROMORPHIC mapping MULTIPLICITY
中孕期母血清产前筛查抑制素A检测室间质量调查结果分析
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作者 杜雨轩 冯健明 +6 位作者 王薇 何法霖 钟堃 袁帅 刘佳丽 张志新 王治国 《中华围产医学杂志》 CAS CSCD 北大核心 2019年第5期341-344,共4页
目的分析2018年中孕期母体血清产前筛查抑制素A检测室间质量调查结果,以改进和提高产前筛查实验室抑制素A检测的质量。方法卫生部临床检验中心于2018年3月向全国94家产前筛查实验室发放3个批号质控样本(批号201811~201813)。实验室自愿... 目的分析2018年中孕期母体血清产前筛查抑制素A检测室间质量调查结果,以改进和提高产前筛查实验室抑制素A检测的质量。方法卫生部临床检验中心于2018年3月向全国94家产前筛查实验室发放3个批号质控样本(批号201811~201813)。实验室自愿参加此次调查活动,并按照规定格式上报结果、测定方法、仪器和试剂等相关信息。采用Clinet EQA程序和Microsoft Excel 2010等软件,对各实验室检测结果进行统计分析,并对质控样本是否符合预期结果情况进行描述性评价。结果共有55家实验室回报结果,回报率为58.5%(55/94)。55家中,52家(94.5%)3个批号全部符合预期结果,3家(5.5%)3个批号均不符合预期结果,且各实验室3个批号质控样本检测结果的偏移均位于同一侧(2家所有的3个批号均为负向偏移,1家3个批号的检测结果均为正向偏移)。结论通过本次抑制素A检测室间质量调查结果发现大部分实验室均能获得满意的结果,但仍有部分实验室存在与预期不符合的结果。有必要将中孕期母血清产前筛查抑制素A纳入为正式的室间质量评价计划,定期监测其检测质量水平。 展开更多
关键词 抑制素类 产前诊断 临床实验室技术 质量控制 妊娠中期
PEOPLE & POINTS
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《北京周报:英文版》 2019年第12期10-11,共2页
AIRCRAFT DESIGNER KEEN ON MAGLEVSWu Guanghui,a deputy to the 13th National People’s Congress(NPC),China’s top legislature,and chief designer of the C919 homegrown passenger jet,suggested speeding up the research int... AIRCRAFT DESIGNER KEEN ON MAGLEVSWu Guanghui,a deputy to the 13th National People’s Congress(NPC),China’s top legislature,and chief designer of the C919 homegrown passenger jet,suggested speeding up the research into maglev trains at a panel discussion of the Shanghai delegation during the Second Session of the 13th NPC on March 12. 展开更多
关键词 PEOPLE DEPUTY SECOND SESSION
FOCUS OF DIPLOMACY
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作者 An Gang 《北京周报:英文版》 2019年第12期16-17,共2页
Top diplomat outlines China’s performance and priorities On March 8,China’s State Councilor and Foreign Minister Wang Yi met the press on the sidelines of the Second Session of the 13th National People’s Congress.W... Top diplomat outlines China’s performance and priorities On March 8,China’s State Councilor and Foreign Minister Wang Yi met the press on the sidelines of the Second Session of the 13th National People’s Congress.Wang answered 21 questions during the two-hour press conference,reviewing China’s diplomatic performance and the hot issues in 2018.His remarks were a window to China’s diplomatic priorities and political direction. 展开更多
关键词 DIPLOMACY PERFORMANCE the SECOND SESSION
High efficiency second harmonic generation of nanojoule-level femtosecond pulses in the visible based on BiBO
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作者 Mario Galletti Hugo Pires +4 位作者 Victor Hariton Celso Paiva Joao Swen Künzel Marco Galimberti Goncalo Figueira 《高功率激光科学与工程:英文版》 CAS CSCD 2019年第1期82-89,共8页
We demonstrate high efficiency second harmonic generation(SHG)of near infrared femtosecond pulses using a BiB3O6 crystal in a single-pass tight focusing geometry setup.A frequency doubling efficiency of 63%is achieved... We demonstrate high efficiency second harmonic generation(SHG)of near infrared femtosecond pulses using a BiB3O6 crystal in a single-pass tight focusing geometry setup.A frequency doubling efficiency of 63%is achieved,which is,to the best of our knowledge,the highest value ever reported in the femtosecond regime for such low energy(nJ-level)pumping pulses.Theoretical analyses of the pumping scheme focusing waist and the SHG efficiency are performed,by numerically solving the three wave mixing coupled equations in the plane-wave scenario and by running simulations with a commercial full 3D code.Simulations show a good agreement with the experimental data regarding both the efficiency and the pulse spectral profile.The simulated SHG pulse temporal profile presents the characteristic features of the group velocity mismatch broadening in a‘thick’crystal. 展开更多
关键词 nonlinear process SECOND HARMONIC generation PUMPING scheme PARAMETRIC amplification/oscillators high power laser
The Belt and Road Initiative and Its Expanding Influence in Africa
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《中国与非洲:英文版》 2019年第6期48-49,共2页
China held the Second Belt and Road Forum for International Cooperation in Beijing at the end of April, amid concerns over the countiy's slowing economy, which has led some govern ments to ask how China plans to c... China held the Second Belt and Road Forum for International Cooperation in Beijing at the end of April, amid concerns over the countiy's slowing economy, which has led some govern ments to ask how China plans to continue with this project, especially in relation to its effect on the African continent. However, with the addition of new members such as G7 nation Italy, and West European country Swit zerland signing deals, the Belt and Road Initiative looks to continue its influence globally. Given this success in Europe for the initiative, how has the forum benefitted Africa? 展开更多
关键词 China the Second BELT and ROAD INFLUENCE globally
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