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生物工程原理在宫颈重塑及自发性早产中的应用进展

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国际妇产科学杂志 2024年第4期51卷 453-457页

作者：陈欣欣李懋姜锋西安医学院 710021 空军军医大学唐都医院妇产科

宫颈的机械功能对正常妊娠过程至关重要。在正常妊娠期间,宫颈显著软化,顺应性增加,从而维持妊娠并允许成功分娩,异常的宫颈重塑被认为是导致自发性早产的原因之一。目前,自发性早产的预测手段十分有限,临床工作中最常应用的是经阴道超... 详细信息

宫颈的机械功能对正常妊娠过程至关重要。在正常妊娠期间,宫颈显著软化,顺应性增加,从而维持妊娠并允许成功分娩,异常的宫颈重塑被认为是导致自发性早产的原因之一。目前,自发性早产的预测手段十分有限,临床工作中最常应用的是经阴道超声测量宫颈管长度。随着生物工程的发展,其相关技术应用于科学研究并进一步在临床工作中进行实践成为可能。主要总结了电阻抗图谱、超声剪切波弹性成像、弥散张量成像、宫颈抽吸、拉曼光谱等生物工程原理技术在预测自发性早产、建立宫颈重塑模型中的应用,以及应用生物相容性水凝胶等新型材料在预防自发性早产发生中的探索。

关键词：生物工程原理子宫颈宫颈重塑自发性早产生物力学模型

Exact Inference for Joint Type-I Hybrid Censoring Model with Exponential Competing Risks Data

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Acta Mathematicae Applicatae Sinica 2017年第3期33卷 645-658页

作者： SONG mao Yi-min SHI Xiao-lin WANG Department of Economics and Management Shanxi UniversityTaiyuan 030006China Department of Applied Mathematics Northwestern Polytechnical UniversityXi'an 710072China 78020 Unit Kunming 655000China

Assuming that the failure time under different risk factors follows the independent exponential distribution, a joint model under Type-I hybrid censoring is addressed in detail. Based on the Maximum likelihood estimates （MLEs） of unknown parameters, we obtain exact distributions of MLEs by using the moment generating function （MGF）. Confidence intervals （CIs） of parameters are constructed through both the exact method and the parametric bootstrap method. Then we compare the performances of different methods by Monte Carlo simulations. Finally, the validity of the proposed models and methods are demonstrated by a numerical example.

关键词： Joint Type-I hybrid censoring Competing causes Moment generating function Likelihood inference Bootstrap methods.

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小半径公路隧道视线诱导设施优化实验研究

武汉理工大学学报（交通科学与工程版） 2024年第1期48卷 13-18页

作者：贝润钊杜志刚梅家林徐文广冒卫星武汉理工大学交通与物流工程学院武汉430063 安徽中益新材料科技有限公司滁州239500

文中建立五种视线诱导场景,选取37名被试进行驾驶模拟实验,分析车辆开始减速位置和弯道段横向偏移.结果表明:相较于改善前,反光环方案和线形诱导标组合方案均有明显改善效果;反光环方案中5.4%的被试会出现异常驾驶行为,增设线形诱导标... 详细信息

文中建立五种视线诱导场景,选取37名被试进行驾驶模拟实验,分析车辆开始减速位置和弯道段横向偏移.结果表明:相较于改善前,反光环方案和线形诱导标组合方案均有明显改善效果;反光环方案中5.4%的被试会出现异常驾驶行为,增设线形诱导标后没有出现异常驾驶行为;增设4 m线形诱导标可以使被试在弯道段的车道保持能力进一步提高12.5%,增设6 m线形诱导标可以让被试开始减速位置进一步提前14.5%.

关键词：交通工程小半径高速公路隧道视线诱导设施驾驶模拟驾驶绩效

维普期刊数据库博看期刊

Effect of Crystallographic Texture on Anisotropy of Yield Strength in X100 Pipeline Steel

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Journal of Iron and Steel Research International 2013年第8期20卷 66-71页

作者： ZONG Cui ZHU Guo-hui mao Wei-min School of Materials Science and Engineering University of Science and Technology Beijing School of Materials Science and Engineering Anhui University of Technology

The anisotropy of microstructures and mechanical properties in commercial American Petroleum Institute （API） X100 pipeline steel was systematically investigated by experimental measurements. The experimental results show that anisotropy of yield strength could be observed considerably, which should be attributed to the crystallographic rex tures due to deformation and transformation of texture components. This is because the effect of the inhomogeneity of microstructure in different directions on the mechanical properties could be reasonably neglected based on the ex perimental investigation of grain size distribution. The effect of crystallographic texture on the anisotropy of yield strength was interpreted theoretically based on the relationship between yield strength and average orientation factor.

关键词： pipeline steel crystallographic texture yield strength anigotropy microstructure

Detrital Zircon Geochronology of the Radial Sand Ridge System of Jiangsu Coast, East China: Implication for Sediment Provenance

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Journal of Earth Science 2018年第1期29卷 144-154页

作者： Jinbao Su Wenbo Rao Yigang Wang Changping mao School of Earth Sciences and Engineering Hohai University School of Harbour Coastal and Offshore Engineering Hohai University

The radial sand ridge system （RSRS） located at Jiangsu coast of China attracts much attention on its origin and mechanic of formation for its special structure and potential land resource. Due to complicated hydrodynamic condition, the Jiangsu RSRS is a hot debated on its potential sources, Yangtze River or Yellow River？ We collected ten sand samples from surface sediments along the west coast of Bohai Sea and Yellow Sea from the modern Yellow River estuary to Yangtze River estuary in summer, 2013. The samples are analyzed by method of detrital zircon age for source identification of the RSRS sediments. The U-Pb age spectra of detrital zircon grains of the samples show a wide range from Cenozoic to Late Archean with several age peaks. Comparing the age spectra between the Yangtze River and the Yellow River, the detrital zircons have younger age （〈100 Ma） group in the Yangtze River. These age distribution of the Jiangsu coastal RSRS sediments are similar to that of the Yangtze River, but different from the Yellow River. The samples located adjacent to the old Yellow River Delta show more wide-range age distribution, implying a compounded origination from the both rivers. Based on these findings it is proposed that, contrary to common opinion, the main sediment source of the Jiangsu RSRS is the Yangtze River, rather than the Yellow River. By implication, there should be evidence of hydrodynamic mechanics of oceanic currents and tidal motion. This aspect awaits confirmation in future research.

关键词： Yellow Sea Jiangsu coast radial sand ridge zircon geochronology sediment provenance.

Assessment of Photochemical Reflectance Index as a Tool for Evaluation of Chlorophyll Fluorescence Parameters in Cotton and Peanut Cultivars Under Water Stress Condition

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Agricultural Sciences in China 2010年第5期9卷 662-670页

作者： Shahenshah Yasuda Yoshizumi LI mao-song Isoda Akihiro Graduate School of Horticulture Chiba University Chiba 271-8510 Japan Graduate School oflnformatics Tokyo University of Information Sciences Chiba 265-8501 Japan Institute of Environment and Sustainable Development for Agriculture Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China

The relationships between photochemical reflectance index （PRI） and the chlorophyll fluorescence parameters were examined to assess suitability of PRI as a remote-sensing tool for the chlorophyll fluorescence parameters. A greenhouse experiment was conducted using cotton and peanut crops under water stress condition. Five cotton and six peanut cultivars were grown using Andosole soil in pots maintained at two water levels; the control and water stress treatment （WS） of 100 and 50% of the daily transpiration, respectively. Higher non-photochemical quenching （NPQ） was exhibited by peanut than that of cotton by the water stress. On the other hand, the decreases of the actual quantum yield of photosystem II （△F/F＇m） and PRI by the water stress in cotton were larger than those in peanut. There were positively significant correlation coefficients between PRI and △F/F＇m in cotton at noon and in the afternoon including the control and WS. The correlations of PRI with NPQ were negatively significant at noon and in the afternoon for cotton, and in the afternoon for peanut. No clear relationship was found among these parameters in the morning probably due to the diurnal increase in global solar radiation. It was concluded that there would be a possibility to detect the effects of water stress on △F/F＇m and NPQ by PRI with some exceptions, although PRI could not note varietals differences in △F/F＇m and NPQ for each treatment.

关键词： actual quantum yield of photosystem II Arachis hypogaea L. Gossypium hirsutum L. non-photochemicalquenching photochemical reflectance index remote sensing water stress

The algorithms of chlorophyll-a concentration for CMODIS

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Acta Oceanologica Sinica 2007年第5期26卷 25-33页

作者： mao Zhihua ZHU Qiankun GONG Fang PAN Delu Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China State Key Laboratory of Satellite Ocean Environment Dynamics Hangzhou 310012 China

The algorithms of extracting chlorophyll-a （Chl-a） concentration have been established for Chinese moderate resolution imaging spectrometer （CMODIS） mounted on Shenzhou-3 spaceship launched on 25 March 2002. The CMODIS is an ocean color sensor with 30 visible channels and 4 infrared channels, much different from other ocean color satellites and needs new algorithms to process data. Three models of Chl-a concentration were established based on Chl-a data retrieved from sea-viewing wide field-ofview sensor （SeaWiFS）, with the average relative errors of 26. 6%, 24%. 0% and 33.5%, respectively. This practical and economic approach can be used for developing the algorithms of Chinese ocean color and temperature sensor （COCTS） on the satellite Haiyang-1 to derive the Chl-a concentration concentration distribution. The applicability of the algorithms was analyzed using some in situ measurements. Suspended sediment is the main factor influencing the accuracy of the spectral ratio algorithms of Chl-a concentration. The algorithms are suitable to using in the regions where suspended sediment concentrations （ SSC ） are less than 5 g/m^3 under the condition of relative error of Chl-a concentration retrieval within 35%. High concentration of suspended sediment leads to the overestimate remote sensing retrieval of concentration of Chl-a, while low-middle SSCs lead to the low Chl-a concentration values using the spectral ratio algorithms. Since the accuracy of Chl-a concentration by the spectral ratio algorithms is limited to waters of Case 2, it is necessary to develop semi-analytical models to improve the performance of satellite ocean color remote sensing in turbid coastal waters.

关键词： CMODIS chlorophyll-a concentration suspended sediment concentration

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职业性中暑5例

中华劳动卫生职业病杂志 2024年第1期42卷 58-61页

作者：邓红平潘红英姚建华杨跃新毛洁苏州市疾病预防控制中心职业卫生科苏州215004 苏州市卫生健康委员会职业健康处苏州215002

目的通过对5例因高温导致的职业性中暑病例分析,阐述发病机制,总结新修订GBZ 41-2019《职业性中暑诊断标准》热痉挛、热衰竭的临床特点,为预防职业性中暑疾病的发生提出可控对策。方法于2021年11月,以2020年9月10日至2021年9月30日期间... 详细信息

目的通过对5例因高温导致的职业性中暑病例分析,阐述发病机制,总结新修订GBZ 41-2019《职业性中暑诊断标准》热痉挛、热衰竭的临床特点,为预防职业性中暑疾病的发生提出可控对策。方法于2021年11月,以2020年9月10日至2021年9月30日期间苏州市疾病预防控制中心职业卫生科收治并诊断的5例职业性中暑患者作为研究对象,调查职业史、临床诊疗等相关资料,并对诊断过程加以分析与总结。结果5例患者发病于夏季7~8月份,属于高温作业,经及时治疗后好转而出院。5例患者自身的症状、体征及实验室检查存在差异性,但均被诊断为职业性中暑。结论用人单位应重视夏季高温防护降温工作,加强劳动保护。热痉挛、热衰竭患者若及时救治,基本能康复痊愈。职业病诊断医师应认真学习新的职业病诊断标准,不断提升诊断能力。

关键词：高温职业性中暑热痉挛热衰竭职业病诊断

A new algorithm based on the background field for red tide monitoring in the East China Sea

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Acta Oceanologica Sinica 2014年第5期33卷 62-71页

作者： XU Xiaohui PAN Delu mao Zhihua TAO Bangyi South China Sea Institute of Oceanology Chinese Academy of Sciences State Key Laboratory of Satellite Ocean Environment Dynamics the Second Institute of Oceanography State Oceanic Administration University of Chinese Academy of Sciences

Remote sensing has been proven to be an effective means of monitoring red tides. The spectral information is an important basis for establishing a model to monitor red tides. The spectral curves of red tide events are analyzed and compared with multiyear monthly averaged spectral curves based on MODIS data from July 2002 to June 2012, as well as spectral differences at the same location during red tide presence and absence. A red tide monitoring algorithm is developed based on the background field to extract the red tide information of the East China Sea （ECS）. With the application of the algorithm in the ECS, the results reveal that the developed model can effectively determine the location of red tides, with good correspondence to the results from an official bulletin. This demonstrates that the algorithm can effectively extract the red tide information.

关键词： red tide remote sensing background field East China Sea