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宫内窘迫新生儿血乳酸和心肌酶水平的变化

广东医科大学学报 2017年第2期35卷 186-188页

作者：陈志辉梁春杰张定芬吴菲远陈康荣广东省湛江中心人民医院广东湛江524037

目的了解新生儿发生宫内窘迫时血乳酸以及心肌酶水平的变化。方法选取宫内窘迫新生儿50例(A组),同时选取窒息的新生儿(B组)和正常新生儿(C组)50例作为对照,检测其脐动脉血(出生时)及出生后3、7 d的血乳酸、肌酸激酶(CK)、肌酸激酶同工酶... 详细信息

目的了解新生儿发生宫内窘迫时血乳酸以及心肌酶水平的变化。方法选取宫内窘迫新生儿50例(A组),同时选取窒息的新生儿(B组)和正常新生儿(C组)50例作为对照,检测其脐动脉血(出生时)及出生后3、7 d的血乳酸、肌酸激酶(CK)、肌酸激酶同工酶MB(CKMB)、乳酸脱氢酶(LDH)、α-羟丁脱酸氢酶(HBDH)水平,并对其相互关系进行分析。结果 A组新生儿出生时和出生后3 d的血乳酸、CK、CKMB、LDH和HBDH水平均显著高于C组,明显低于B组(P0.05)。宫内窘迫新生儿的脐带血乳酸水平与CK、CKMB均呈正相关性(P<0.05)。结论宫内窘迫可影响新生儿的血乳酸和心肌酶水平,脐动脉血乳酸检测可协助诊断和评估宫内窘迫。

关键词：新生儿宫内窘迫窒息血乳酸心肌酶

Kinetic Studies on Forming Iso-nuclear β-type Chelates of Rare Earths with p-Sulphoaminobromophosphonazo

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Chinese Chemical Letters 2000年第12期11卷 1101-1102页

作者： fei ZHA Li yuan Jin Zhang GAO Hui chen Chemistry&Chemical Engineering College Northwest Normal UniversityLanzhou 730070

The kinetic behavior of forming the iso-nuclear β-type chelates of rare earth ions (RE~3+) with p-sulphoaminobromophosphonazo (BPA-pSN) in ClCH2COOH-CH3COONa buffer solutions were studied by a spectrophotometric method.

关键词： β-Type chelates rare earths p-sulphoaminobromophosphonazo.\

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认知症污名的研究新进展

中国全科医学 2025年第5期28卷 631-638页

作者：袁易卿陈虹霖复旦大学社会发展与公共政策学院上海市200433 东芬兰大学社会科学院库奥皮奥70211

认知障碍又称认知症。随着人口老龄化进程的加快,受认知症和阿尔茨海默病影响的人群在不断增多。有关认知症的污名在国际社会被公认为普遍存在,但相关的研究却十分有限。本文通过梳理既往有关认知症污名的研究成果,发现有关认知症污名... 详细信息

认知障碍又称认知症。随着人口老龄化进程的加快,受认知症和阿尔茨海默病影响的人群在不断增多。有关认知症的污名在国际社会被公认为普遍存在,但相关的研究却十分有限。本文通过梳理既往有关认知症污名的研究成果,发现有关认知症污名的定义和测量方式有待统一,有关经济欠发达地区的研究十分欠缺,能够进行因果推断的证据缺乏,干预研究的数量和质量均有很大的提升空间。对于认知症污名的研究,为打破传统污名研究领域中二元主体视角提供了难得的契机。同时,对认知症污名形成机制的讨论,也可以深化学界对标签理论和归因理论的探讨。

关键词：认知障碍认知阿尔茨海默病痴呆污名综述

Development and evaluation of the refined zenith tropospheric delay(ZTD)models

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Satellite Navigation 2021年第1期2卷 296-304页

作者： fei Yang Xiaolin Meng Jiming Guo Debao yuan Ming chen College of Geoscience and Surveying Engineering China University of Mining and Technology-Beijing100083 BeijingChina Global Geospatial Engineering Ltd. The Sino-UK Geospatial Engineering Centre18 Radford Bridge RoadNottingham NG81NAUK School of Geodesy and Geomatics Wuhan University129 Luoyu RoadWuhan 430079China National Geomatics Center of China Beijing 100830China.

The tropospheric delay is a significant error source in Global Navigation Satellite System(GNSS)positioning and *** is usually projected into zenith direction by using a mapping *** is particularly important to establish a model that can provide stable and accurate Zenith Tropospheric Delay(ZTD).Because of the regional accuracy difference and poor stability of the traditional ZTD models,this paper proposed two methods to refine the Hopfield and Saastamoinen ZTD *** is by adding annual and semi-annual periodic terms and the other is based on Back-Propagation Artificial Neutral Network(BP-ANN).Using 5-year data from 2011 to 2015 collected at 67 GNSS reference stations in China and its surrounding regions,the four refined models were *** tropospheric products at these GNSS stations were derived from the site-wise Vienna Mapping Function 1(VMP1).The spatial analysis,temporal analysis,and residual distribution analysis for all the six models were conducted using the data from 2016 to *** results show that the refined models can effectively improve the accuracy compared with the traditional *** the Hopfield model,the improvement for the Root Mean Square Error(RMSE)and bias reached 24.5/49.7 and 34.0/52.8 mm,*** values became 8.8/26.7 and 14.7/28.8 mm when the Saastamoinen model was refined using the two *** exploration is conducive to GNSS navigation and positioning and GNSS meteorology by providing more accurate tropospheric prior information.

关键词： GNSS Tropospheric delay ZTD Refined model ANN

Improving the Softness of BOPP Films： From Laboratory Investigation to Industrial Processing

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Chinese Journal of Polymer Science 2017年第9期35卷 1122-1131页

作者： ling-pu meng xiao-wei chen yuan-fei lin 李良彬 National Synchrotron Radiation Lab Key Laboratory of Soft Matter Chemistry Chinese Academy of Sciences University of Science and Technology of China Hefei 230026 China

Young＇s modulus of biaxially oriented polypropylene （BOPP） films prepared with homemade film stretcher was investigated, which can be used to indicate the softness of films. It was found that the modulus of films was decreased by about 69% as the content of polyethylene （PE） added into polypropylene （PP） reached 30%. Also, increasing draw temperature can induce lower stress level during stretching, which may lead to the formation of crystals with low orientation level and thus decreased modulus of films. Based on laboratory study, BOPP films produced on commercial line were studied by differential scanning calorimetry （DSC）, wide and small-angle X-ray scattering （WAXS, SAXS） with varying contents of PE. SAXS results show that the crystals are oriented in both machine direction （MD） and transverse direction （TD）, and the crystals are more oriented in TD than MD according to the WAXS results for all films. Also, the orientation parameter of crystal along TD increases from 0.68 to 0.83 as the contents of PE increase from 0% to 25%. Meanwhile, the modulus of films in MD declines with increase of PE contents generally, improving the film softness. Orientation of crystals is thus an effective structure parameter to adjust the film softness. The relationship of processing-structure-property is also established.

关键词： Polymer films Stretching processing Processing-structure-property relationship Crystal orientation

Flash memory based computing-in-memory system to solve partial differential equations

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Science China(Information Sciences) 2021年第6期64卷 257-258页

作者： Yang FENG fei WANG Xuepeng ZHAN yuan LI Jiezhi chen School of Information Science and Engineering Shandong University

Dear editor,Many emerging non-volatile memories(NVM), such as resistive random access memory(RRAM) [1], phase-change memory(PCM) [2], and ferroelectric RAM(FeR AM) [3],together with the conventional flash memory [4, 5... 详细信息

关键词： Flash memory based computing-in-memory system to solve partial differential equations

A modified stochastic model for LS+AR hybrid method and its application in polar motion short-term prediction

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Geodesy and Geodynamics 2024年第1期15卷 100-105页

作者： fei Ye Yunbin yuan State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430077China BeiDou High-precision Satellite Navigation and Location Service Hunan Engineering Research Center Hunan Institute of Geomatics Sciences and TechnologyChangsha 410007China Hunan Continuously Operating Reference Stations(HNCORS)Data Center Hunan Institute of Geomatics Sciences and TechnologyChangsha 410007China

Short-term(up to 30 days)predictions of Earth Rotation Parameters(ERPs)such as Polar Motion(PM:PMX and PMY)play an essential role in real-time applications related to high-precision reference frame ***,least squares(LS)+auto-regressive(AR)hybrid method is one of the main techniques of PM ***,the weighted LS+AR hybrid method performs well for PM short-term ***,the corresponding covariance information of LS fitting residuals deserves further exploration in the AR *** this study,we have derived a modified stochastic model for the LS+AR hybrid method,namely the weighted LS+weighted AR hybrid *** using the PM data products of IERS EOP 14 C04,the numerical results indicate that for PM short-term forecasting,the proposed weighted LS+weighted AR hybrid method shows an advantage over both the LS+AR hybrid method and the weighted LS+AR hybrid *** to the mean absolute errors(MAEs)of PMX/PMY sho rt-term prediction of the LS+AR hybrid method and the weighted LS+AR hybrid method,the weighted LS+weighted AR hybrid method shows average improvements of 6.61%/12.08%and 0.24%/11.65%,***,for the slopes of the linear regression lines fitted to the errors of each method,the growth of the prediction error of the proposed method is slower than that of the other two methods.

关键词： Stochastic model LS+AR Short-term prediction The earth rotation parameter(ERP) Observation model

Selenium-engineered bottom-up-synthesized lanthanide coordination nanoframeworks as efficiency X-ray-responsive radiosensitizers

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Nano Research 2023年第4期16卷 5169-5175页

作者： Liwen Zhu Leung Chan Junping Wang Mingkai chen fei Cai yuan Tian Li Ma Tianfeng chen Department of Chemistry and Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and ApplicationsJinan UniversityGuangzhou 510632China

Radiotherapy is one of the main therapeutic methods for cancers;however,nonselective killing of normal cells and tumor cells by X-ray inevitably results in toxicity and side *** low-toxicity and high-efficiency radiosensitizers to reduce the practical dose of X-ray is a promising approach to overcoming these side ***,we report the use of carboxylatecontaining organic ligands to construct one-dimensional high-Z lanthanide chains for efficient response to *** onedimensional lanthanide chains are stacked through weak interactions to form coordination nanoframeworks in the presence of polyethylenimine(PEI).The morphology and activity of the synthesized nanoframeworks can be regulated through selenium atom *** study presents a promising approach for effective radiotherapy through selenium-engineering stable lanthanide nanoframeworks with precise coordination structures as radiosensitizers to mitigate X-ray side effects.

关键词： selenium lanthanide coordination nanoframeworks radiotherapy radiosensitizers

Improved LS+MAR hybrid method to UT1-UTC ultra-short-term prediction by using first-order-difference UT1-UTC

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Geodesy and Geodynamics 2024年第4期15卷 379-385页

作者： fei Ye Yunbin yuan BeiDou High-precision Satellite Navigation and Location Service Hunan Engineering Research Center Hunan Institute of Geomatics Sciences and TechnologyChangsha410007China State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan430077China HNCORS Data Center Hunan Institute of Geomatics Sciences and TechnologyChangsha 410007China

Accurate ultra-short-term prediction of the Earth rotation parameters(ERP)holds paramount impor-tance for real-time applications,particularly in reference frame *** them,diurnal rota-tion(UT1-UTC)which cannot be directly estimated through Global Navigation Satellite System(GNSS)techniques,significantly affects the rapid and ultra-rapid orbit determination of GNsS ***-ently,the traditional LS(least squares)+AR(autoregressive)and LS+MAR(multivariate autoregressive)hybrid methods stand as primary approaches for UT1-UTC ultra-short-term predictions(1-10 days).The LS+MAR hybrid method relies on the UT1-UTC and LOD(length of day)***,the correlation between LOD and first-order-difference UT1-UTC is stronger than that between LOD and *** light of this,and with the aid of the first-order-difference UT1-UTC,we propose an enhanced LS+MAR hybrid method to UT1-UTC ultra-short-term *** using the UT1-UTC and LOD data series of the IERS(International Earth Rotation and Reference Systems Service)EOP 14 C04 product,we conducted a thorough analysis and evaluation of the improved method's prediction performance compared to the traditional LS+AR and LS+MAR hybrid *** to the numerical results over more than 210 days,they demonstrate that,when considering the correlation information between the LoD and the first-order-difference UT1-UTC,the mean absolute errors(MAEs)of the improved LS+MAR hybrid method range from 21 to 934μs in 1-10 days *** comparison to the traditional LS+AR hybrid method,the MAEs show a reduction of 7-53μs in 1-10 days predictions,with corresponding improvement percentages ranging from 1 to 28%.Similarly,when compared to the traditional LS+MAR hybrid method,the MAEs have a reduction of 5-42μs in 1-10 days predictions,with corresponding improvement percentages ranging from 4-20%.Additionally,when aided by GNSS-derived LOD data series,the MAEs of improved LS+MAR hybrid method experience further

关键词： UT1-UTCultra-short-termprediction Rapidandultra-rapidproducts LS+AR and LS+MAR Correlation First-order-differenceUT1-UTC