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Comparison of the Reference Intervals Used for the Evaluation of Maternal Thyroid Function During Pregnancy Using Sequential and Nonsequential Methods

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Chinese Medical Journal 2016年第7期129卷 785-791页

作者： Jian-Xia Fan Shuai Yang Wei Qian feng-tao shi He-feng Huang Department of Obstetrics and Gynecology International Peace Maternity and Child Health Hospital School of Medicine Shanghai Jiao Tong University Shanghai 200030 China Institute of Embryo-Fetal Original Adult Disease Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai 200030 China

Background： Maternal thyroid dysfunction is common during pregnancy, and physiological changes during pregnancy can lead to the overdiagnosis of hyperthyroidism and misdiagnosis of hypothyroidism with nongestation-specific reference intervals. Our aim was to compare sequential with nonsequential methods for the evaluation of thyroid function in pregnant women. Methods： We tested pregnant women who underwent their trimester prenatal screening at our hospital from February 2011 to September 2012 for serum thyroid stimulating hormone （TSH） and free thyroxine （FT4） using the Abbott and Roche kits. There were 447 and 200 patients enrolled in the nonsequential and sequential groups, respectively. The central 95% range between the 2.5th and the 97.5th percentiles was used as the reference interval for the thyroid function parameter. Results： The nonsequential group exhibited a significantly larger degree of dispersion in the TSH reference interval during the 2nd and 3rd trimesters as measured using both the Abbott and Roche kits （all P 〈 0.05）. The TSH reference intervals were significantly larger in the nonsequential group than in the sequential group during the 3rd trimester as measured with both the Abbott （4.95 vs. 3.77 mU/L, P 〈 0.001） and Roche kits （6.62 vs. 5.01 mU/L, P〈 0.004）. The nonsequential group had a significantly larger FT4 reference interval as measured with the Abbott kit during all trimesters （ 12.64 vs. 5.82 pmol/L; 7,96 vs. 4.77 pmol/L; 8.10 vs. 4.77 pmol/L, respectively, all P 〈 0.05）, whereas a significantly larger FT4 reference interval was only observed during the 2nd trimester with the Roche kit （7.76 vs. 5.52 pmol/L, P = 0.002）. Conclusions： It was more reasonable to establish reference intervals for the evaluation of maternal thyroid function using the sequential method during each trimester of pregnancy. Moreover, the exclusion of pregnancy-related complications should be considered in the inclusion criteria for thyroid function tests.

关键词： Nonsequential Pregnancy Trimester Reference Interval Sequential Thyroid Function Tests

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使用依纳“V”型牵伸装置进行细纱牵伸改造

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棉纺织技术 1987年第10期 594-598页

作者：冯士陶丹阳棉纺织厂

本文简要介绍了我厂在细纱牵伸改造中为什么要选用依纳“V”型牵伸装置以及依纳“V”型牵伸裝置的主要特点,重点介绍了如何用好气动加压,最后还介绍了依纳“V”型牵伸的纺纱质量情况,供各厂细纱牵伸改造选型参考。

关键词：牵伸装置细纱牵伸牵伸机构牵伸型式摇架工艺配置棉纱质量强力不匀率粗纱定量细纱锭子

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采用自抗扰控制的空间激光通信精跟踪系统

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激光与红外 2017年第1期47卷 19-23页

作者：彭小峰刘世涛曹阳张勋重庆理工大学电子信息与自动化学院重庆400054

空间激光通信的视轴稳定是激光通信链路建立的前提。针对通信终端载体的非线性扰动和扰动模型未知造成视轴稳态误差较大的问题,设计了自抗扰控制方法,并采用模糊控制理论自适应调整非线性状态误差反馈控制律中的相关参数。实验结果表明... 详细信息

空间激光通信的视轴稳定是激光通信链路建立的前提。针对通信终端载体的非线性扰动和扰动模型未知造成视轴稳态误差较大的问题,设计了自抗扰控制方法,并采用模糊控制理论自适应调整非线性状态误差反馈控制律中的相关参数。实验结果表明,与自适应PID控制方法相比,采用模糊自抗扰控制方法可以有效抑制平台的非线性扰动,并且具有较快的响应速度与较强的鲁棒性,可以满足系统的稳态精度要求。

关键词：空间激光通信通信终端视轴稳定自抗扰控制模糊理论

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STUDY OF THE NONLINEAR ACOUSTIC PARAMETER B/A IN ANIMAL SOFT TISSUES

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Chinese Science Bulletin 1987年第20期32卷 1423-1426页

作者：龚秀芬冯若石涛叶式公 Institute of Acoustics Nanjing University

Owing to the rapid development of ultrasonic medicine, the research on nonlinear acoustical effects of biomedical frequencies and intensities is especially attractive in recent years. It is well known that ultrasound can penetrate into tissues of the human body. Yet, the nonlinear effects accelerate the loss of ultrasound in propagating media and limit the amount of Sound power deliverable to the media. Nonlinear acoustical parameter B/A is a basic one for determining these effects, therefore, the study of nonlinearity parameter

关键词： attractive nonlinearity biomedical penetrate accelerate determining attenuation propagating filled ultrasonic

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Temperature-control Strategy in an Industrial Clavulanic Acid Fermentation

Temperature-control Strategy in an Industrial Clavulanic Aci...

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The 12th Asian Pacific Confederation of Chemical Engineering Congress

作者： feng tao Zhu Xiao-shi Wang Yong-Hong Zhang Si-Liang State Key Laboratory of Bioreaaor Engineering,National Engineering Research Center for Biotechnology,East China University of Science and Technology,200237 Shanghai,China Chu Ju Cao BinShanxi Weiqida Pharmaceutical Co,Ltd,Datong 087300,China

This study investigates the effect of temperature-control strategy on the davulanic acid fer- mentation in 50 L *** acid was induced by the low growth rate at the end of id- iophase when fermentation entered a product... 详细信息

关键词： clavulanic acid antibiotic fermentation temperature- control dissolved oxygen

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EXPERIMENTAL STUDY OF CONDENSATION HEAT TRANSFER CHA- RACTERISTICS OF HORIZONTAL TUBE BUNDLES IN VACUUM STATES

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Journal of Hydrodynamics 2012年第4期24卷 628-634页

作者： CHENG Shen SUN feng-zhong shi Yue-tao School of Energy Source and Power Engineering Shandong UniversityJinan 250061China

TO develop an excellent heat transfer element under the vacuum condition, experiments about the heat transfer performance of horizontal tube bundles of different materials under various vacuum conditions were carried out, including the stainless steel tube, the brass tube, the Ni-based implanted steel tube and the ion implanted brass tube. The relative trends show that the condensation heat transfer coefficient and the overall heat transfer coefficient of bundles of four materials all increase with the vacuum degree, especially, those of the Ni-based implanted steel tube and the ion implanted brass tube. Under a high vacuum condition （0.07 MPa）, the condensation heat transfer coefficient of the Ni-based implanted steel tube bundle is about 1.4 times of that of the stainless steel tube bundle, the condensation heat transfer coefficient of the ion implanted brass tube bundle is found to be about 1.3 times of that of the common brass tube bundle. Therefore, according to the condensation heat transfer characteristics studied under high vacuum conditions, it is believed that a dropwise condensation is partly achieved on the surface of these two implanted tube bundles, and the ion implantation is shown to be an effective method to achieve the dropwise condensation. Based on this study, it is believed that the Ni-based steel tube may replace the brass tube, which is more expensive as a heat transfer component.

关键词： vacuum heat transfer characteristics condensation heat transfer coefficient dropwise condensation

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10kV配电网系统弧光接地过电压研究

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吉林电力 2010年第5期38卷 5-8页

作者：冯世涛列剑平郑良华郭文宁东北电力大学吉林吉林132012 吉林省电力有限公司电力科学研究院长春130021 沈海热电有限公司沈阳110043

比较了中性点直接接地、不接地、经消弧线圈接地等接地方式的安全性和供电特点,从理论上利用EMTP/ATP电磁暂态程序建立仿真模型,以吉林省66 kV某变电站发生的10 kV单相接地故障为例,计算了弧光接地过电压并分析了降低弧光接地过电压的措... 详细信息

比较了中性点直接接地、不接地、经消弧线圈接地等接地方式的安全性和供电特点,从理论上利用EMTP/ATP电磁暂态程序建立仿真模型,以吉林省66 kV某变电站发生的10 kV单相接地故障为例,计算了弧光接地过电压并分析了降低弧光接地过电压的措施,得出中性点经消弧线圈接地,能够降低弧光接地过电压的幅值;接地残流小于10 A时接地电弧易于自熄弧;弧光接地过电压标幺值由中性点不接地时的2.01降至0.97;在脱谐度绝对值相等条件下,消弧线圈工作在过补偿和欠补偿状态下的弧光接地过电压幅值相差不大。

关键词：电容电流弧光接地过电压消弧线圈 EMTP/ATP仿真

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Flume Experiment Investigation on Propagation Characteristics of Tidal Bore in A Curved Channel

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China Ocean Engineering 2023年第1期37卷 131-144页

作者： FAN Jun tao Ai-feng shi Mo-quan LI Ying PENG Ji Key Laboratory of Ministry of Education for Coastal Disaster and Protection Hohai UniversityNanjing 210098China College of Harbour Coastal and Offshore EngineeringHohai UniversityNanjing 210098China The Adminstrative Committee of Nantong Haimen Sanchang Industrial Park Nantong 226121China Zhejiang University of Water Resources and Electric Power Hangzhou 310018China China Renewable Energy Engineering Institute Beijing 100120China

Tidal bore is a special and intensive form of flow movement induced by tidal effect in estuary areas, which has complex characteristics of profile, propagation and flow velocity. Although it has been widely studied for the generation mechanism, propagation features and influencing factors, the curved channel will complicate the characteristics of tidal bore propagation, which need further investigation compared with straight channel. In this study, the flume experiments for both undular and breaking bores’ propagation in curved channel are performed to measure the freesurface elevation and flow velocity by ultrasonic sensors and ADV respectively. The propagation characteristics,including tidal bore height, cross-section surface gradient, tidal bore propagation celerity, and flow velocity are obtained for both sides of the curved channel. And three bore intensities are set for each type of tidal bores. The freesurface gradients are consistently enlarged in high-curvature section for undular and breaking bores, but have distinct behaviors in low-curvature section. The spatial distributions of tidal bore propagation celerity and flow velocity are compared between concave and convex banks. This work will provide experimental reference for engineering design of beach and seawall protection, erosion reduction and siltation promotion in estuary areas with the existence of tidal bores.

关键词： tidal bore curved channel flume experiment propagation celerity bore intensity

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Morphologies evolution and mechanical behaviors of SiC nanowires reinforced C/(PyC-SiC)_(n)multilayered matrix composites

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Journal of Materials Science & Technology 2022年第1期96卷 190-198页

作者： Xinfa Tian Hejun Li Xiaohong shi Hongjiao Lin Ningning Yan tao feng State Key Laboratory of Solidification Processing Carbon/Carbon Composites Research CenterNorthwestern Polytechnical UniversityXi’an 710072China School of Mechanics Civil Engineering&ArchitectureNorthwestern Polytechnical UniversityXi’an 710072China

SiC nanowires reinforced C/(PyC-SiC)_(n)multilayered matrix composites(SM-CS for short)were prepared by combined with sol-gel and chemical vapor infiltration(CVI)***,(PyC-Si OC);multilayered structure was formed by cycles of impregnation and *** SiOC was transformed into SiC by heat-treatment,and(PyC-SiC)_(n)multilayered structure would be *** the same time,the PyC layer which was designed as the outmost layer could decrease gas supersaturation to form in-situ tubular SiC nanowires on the surface of multilayered *** results of three-point bending test showed that the maximum force of SM-CS composites was increased by the number of cycles of the preparation process,which were up to enhanced by 74.38%compared with C/C composite *** fracture surface showed that the improvement was due to the multiscale reinforcing system of(PyC-SiC)_(n)multilayered structure and SiC *** structure can protect carbon fibers and release stress concentration by induction of *** the mechanical interlocking effect of SiC nanowires could reinforce bonding force of the remaining matrix.

关键词： C/C Multilayered structure SiC nanowires Flexural property

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Catalytic Asymmetric Synthesis of Axially Chiral 3,3'-Bisindoles by Direct Coupling of Indole Rings

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Chinese Journal of Chemistry 2022年第18期40卷 2151-2160页

作者： feng-tao Sheng Shuang Yang Shu-Fang Wu Yu-Chen Zhang feng shi School of Chemistry and Materials Science Jiangsu Normal UniversityXuzhouJiangsu221116 China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiangHenan453007 China

Comprehensive Summary A new strategy for the enantioselective synthesis of axially chiral 3,3'-bisindoles was devised by the direct coupling of two indole *** strategy makes use of the C3-umpolung reactivity of 2-indolylmethanols,which enables the catalytic asymmetric addition reaction of 2-indolylmethanols with rationally designed 2-substituted indoles,thus constructing axially chiral 3,3'-bisindole scaffolds in overall excellent yields(up to 98%)with high enantioselectivities(up to 96:4 er).This approach not only has overcome the challenges in constructing axially chiral five-five-membered heterobiaryls,but also represents a new application of the C3-umpolung reactivity of 2-indolylmethanols in asymmetric *** importantly,this class of axially chiral 3,3'-bisindoles can undergo a variety of post-functionalizations to give axially chiral 3,3'-bisindole-based organocatalysts,which have found their preliminary applications in asymmetric catalysis.

关键词： Asymmetric catalysis Atroposelectivity Axial chirality Organocatalysis Enantioselectivity

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