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北京协和医院25年早产状况的调查

中国医学科学院学报 2016年第5期38卷 528-533页

作者：蒋芳高劲松钟逸锋胡静杨剑秋马良坤刘俊涛中国医学科学院北京协和医学院北京协和医院妇产科北京100730

目的调查1990年至2014年北京协和医院的早产率、早产孕周分布及病因变化趋势。方法回顾性分析1990年1月1日至2014年12月31日在北京协和医院妇产科分娩的单胎和双胎孕妇,统计其中的早产胎儿数,对不同孕周早产（极早早产、早期早产、轻型... 详细信息

目的调查1990年至2014年北京协和医院的早产率、早产孕周分布及病因变化趋势。方法回顾性分析1990年1月1日至2014年12月31日在北京协和医院妇产科分娩的单胎和双胎孕妇,统计其中的早产胎儿数,对不同孕周早产（极早早产、早期早产、轻型早产）和不同病因早产（自发性早产、治疗性早产）的比例及变化趋势进行统计分析。结果 25年间北京协和医院总体早产率为7.8%,呈升高趋势,单胎和双胎的早产率趋势相同。双胎早产儿占早产儿的23.8%,该比例从早期的15.1%增加至目前的28.5%。早产的孕周分布情况是：〈28周的极早早产26例（0.7%）,28~33＋6周的早期早产1199例（33.9%）,34~36＋6周的轻型早产2310例（65.3%）。单胎和双胎早产孕周分布差异无统计学意义（z=0.844,P=0.398）。以5年为时间跨度统计早产孕周的变迁,28周前早产的比例变化不大;28~33＋6周所占比例逐渐增加（从23.8%到36.1%）;34~36＋6周所占比例逐渐减少（从75.5%到63.3%）。单胎和双胎早产儿的孕周分布随时间的变化趋势与总体变化趋势相似。早产临产、早产胎膜早破和治疗性早产分别占早产的20.2%、38.9%和40.9%。自发性早产和治疗性早产的比例在双胎或单胎中差异无统计学意义（χ~2=1.071,P=0.301）。治疗性早产的比例有所增加,常见原因依次为妊娠期高血压疾病、胎儿因素（包括胎儿宫内窘迫、胎儿生长受限）、前置胎盘、妊娠合并心脏病。结论对于综合性医院,早产率有增加的趋势,与多胎妊娠和治疗性早产的数量增加有关。降低多胎妊娠率、有效防治妊娠合并症、并发症是早产干预的重点。

关键词：早产治疗性早产早产率

Wave effect of gravitational waves intersected with a microlens field Ⅱ:An adaptive hierarchical tree algorithm and population study

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 241-254页

作者： Xikai Shan Guoliang Li Xuechun Chen Wen Zhao Bin hu Shude Mao Department of Astronomy Tsinghua University Purple Mountain Observatory Chinese Academy of Sciences Institute for Frontier in Astronomy and Astrophysics Beijing Normal University School of Physics and Astronomy Beijing Normal University School of Astronomy and Space Science University of Science and Technology of China CAS Key Laboratory for Researches in Galaxies and Cosmology Department of Astronomy University of Science and Technology of ChinaChinese Academy of Sciences

The gravitational lensing wave effect generated by a microlensing field embedded in a lens galaxy is an inevitable phenomenon in strong lensed gravitational waves （SLGWs）.This effect presents both challenges and opportunities for the detection and application of ***,investigating this wave effect requires computing a complete diffraction integral over each microlens in the *** is extremely time-consuming due to the large number of microlenses （10～3-10～6）.Therefore,simply adding all the microlenses is ***,the complexity of the time delay surface makes the lens plane resolution a crucial factor in controlling numerical *** this paper,we propose a trapezoid approximation-based adaptive hierarchical tree algorithm to meet the challenges of calculation speed and *** find that this algorithm accelerates the calculation by four orders of magnitude compared to the simple adding method and is one order of magnitude faster than the fixed hierarchical tree algorithm proposed for electromagnetic *** importantly,our algorithm ensures controllable numerical errors,increasing confidence in the *** with our previous work （***.66,239511,2023）,this paper addresses all numerical issues,including integral convergence,precision,and computational time1).Finally,we conducted a population study on the microlensing wave effect of SLGWs using this algorithm and found that the microlensing wave effect cannot be ignored,especially for Type II SLGWs （from saddle position of the time delay surface） due to their intrinsic geometric structures and their typical intersection with a denser microlensing ***,more than 33%（11%） of SLGWs have a mismatch larger than 1%（3%） compared to the unlensed ***,we found that the mismatch between signal pairs in a doubly imaged GW is generally larger than 10-3,and 61%（25%） of signal pairs have a mismatch larger than 1%（3%）.Therefo

关键词： gravitational lensing diffractional integral algorithm gravitational wave

双歧杆菌四联活菌片联合乌司他丁治疗急性胰腺炎的临床研究

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现代药物与临床 2018年第3期33卷 564-568页

作者：巩会杰张逸强胡景岚驻马店市中心医院消化内科河南驻马店463000

目的探讨双歧杆菌四联活菌片联合注射用乌司他丁治疗急性胰腺炎的临床疗效。方法选取2014年6月—2017年6月在驻马店市中心医院消化内科进行治疗的急性胰腺炎患者206例为研究对象,根据用药的差别将入组患者分为对照组和治疗组,每组各103... 详细信息

目的探讨双歧杆菌四联活菌片联合注射用乌司他丁治疗急性胰腺炎的临床疗效。方法选取2014年6月—2017年6月在驻马店市中心医院消化内科进行治疗的急性胰腺炎患者206例为研究对象,根据用药的差别将入组患者分为对照组和治疗组,每组各103例。对照组静脉滴注注射用乌司他丁,20万单位加入到5%葡萄糖注射液250 m L中,1次/d。治疗组在对照组基础上给予双歧杆菌四联活菌片,1.5 g进行水化后自胃管灌注,夹管2 h,3次/d。两组患者均连续治疗7 d。观察两组的临床疗效,比较两组的临床症状恢复时间、血清因子水平、急性生理与慢性健康评分(APACHEⅡ评分)和生活质量调查表(SF-36)评分。结果治疗后,对照组和治疗组的总有效率分别为84.47%、98.06%,两组比较差异具有统计学意义(P<0.05)。治疗后,治疗组腹痛、腹胀、腹膜刺激征恢复时间均短于对照组,两组比较差异具有统计学意义(P<0.05)。治疗后,两组血清C反应蛋白(CRP)、降钙素(PCT)、可溶性细胞黏附因子-1(s ICAM-1)、白细胞介素-1β(IL-1β)、肿瘤坏死因子-α(TNF-α)水平均显著降低,同组治疗前后比较差异具有统计学意义(P<0.05);且治疗组这些观察指标明显低于对照组,两组比较差异具有统计学意义(P<0.05)。治疗后,两组血淀粉酶(BAMY)、尿淀粉酶(UAMY)水平均显著降低,同组治疗前后比较差异具有统计学意义(P<0.05);且治疗组这些观察指标明显低于对照组,两组比较差异具有统计学意义(P<0.05)。治疗后,两组APACHEⅡ评分显著下降,SF-36评分明显升高,同组治疗前后比较差异具有统计学意义(P<0.05);且治疗组这些观察指标的改善程度明显优于对照组,两组比较差异具有统计学意义(P<0.05)。结论双歧杆菌四联活菌片联合注射用乌司他丁治疗急性胰腺炎具有较好的临床疗效,可改善临床症状,降低炎症水平,改善生存质量,具有一定的临床推广应用价值。

关键词：双歧杆菌四联活菌片注射用乌司他丁急性胰腺炎临床症状恢复时间血清因子 CRP PCT sICAM-1 IL-1β TNF-α APACHEⅡ评分 SF-36评分

First observation results of Macao Science Satellite-1 on lightning-induced electron precipitation

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Science China Earth Sciences 2025年第1期68卷 1-10页

作者： Yongping WANG yixin SUN Qiugang ZONG Gaopeng LU Xudong GU Ze-Jun hu Bin LI Key Laboratory for Polar Science Ministry of Natural Resources Polar Research Institute of China Institute of Space Physics and Applied Technology Peking University State Key Laboratory of Lunar and Planetary Science Macau University of Science and Technology School of Earth and Space Sciences University of Science and Technology of China School of Electronic Information Wuhan University

The Medium-energy Electron Spectrometers(MES) is a space-borne instrument onboard Macao Science Satellite-1(MSS-1) dedicated to monitoring the typical charged particle radiation characteristics in the satellite orbit and the process of their occurrence and development, including short bursts of lightning-induced electron precipitation(LEP).This paper presents the first results of the LEP measurements by the MSS-1.47 LEP events are identified with the routine operation for 3 months since satellite launch, all within the range of 1.5

关键词： Lightning-induced electron precipitation Inner radiation belts Energetic electrons Macao Science Satellite-1

Deep eutectic solvents for separation and purification applications in critical metal metallurgy:Recent advances and perspectives

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 1-19页

作者： Shuo Chen Shengpeng Su Yanfang huang Bingbing Liu hu Sun Shuzhen Yang Guihong Han School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China Zhongyuan Critical Metals Laboratory Henan ProvinceZhengzhou 450001China

Solvent extraction,a separation and purification technology,is crucial in critical metal *** solvents commonly used in solvent extraction exhibit disadvantages,such as high volatility,high toxicity,and flammability,causing a spectrum of hazards to human health and environmental *** solvents have been recognized as potential alternatives to these harmful organic *** the past two decades,several neoteric solvents have been proposed,including ionic liquids(ILs)and deep eutectic solvents(DESs).DESs have gradually become the focus of green solvents owing to several advantages,namely,low toxicity,degradability,and low *** this critical review,their classification,formation mechanisms,preparation methods,characterization technologies,and special physicochemical properties based on the most recent advancements in research have been systematically ***,the major separation and purification applications of DESs in critical metal metallurgy were comprehensively ***,future opportunities and challenges of DESs were explored in the current research *** conclusion,this review provides valuable insights for improving our overall understanding of DESs,and it holds important potential for expanding separation and purification applications in critical metal metallurgy.

关键词： deep eutectic solvents preparations properties separation and purification critical metal metallurgy

Optimization Strategies of Na_(3)V_(2)(PO_(4))_(3) Cathode Materials for Sodium‑Ion Batteries

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Nano-Micro Letters 2025年第2期17卷 204-251页

作者： Jiawen hu Xinwei Li Qianqian Liang Li Xu Changsheng Ding Yu Liu Yanfeng Gao School of Materials Science and Engineering Shanghai UniversityShanghai 200444People’s Republic of China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050People’s Republic of China

Na_(3)V_(2)(PO_(4))_(3)(NVP)has garnered great attentions as a prospective cathode material for sodium-ion batteries(SIBs)by virtue of its decent theoretical capacity,superior ion conductivity and high structural ***,the inherently poor electronic conductivity and sluggish sodium-ion diffusion kinetics of NVP material give rise to inferior rate performance and unsatisfactory energy density,which strictly confine its further application in ***,it is of significance to boost the sodium storage performance of NVP cathode *** to now,many methods have been developed to optimize the electrochemical performance of NVP cathode *** this review,the latest advances in optimization strategies for improving the electrochemical performance of NVP cathode material are well summarized and discussed,including carbon coating or modification,foreign-ion doping or substitution and nanostructure and morphology *** foreign-ion doping or substitution is highlighted,involving Na,V,and PO_(4)^(3−)sites,which include single-site doping,multiple-site doping,single-ion doping,multiple-ion doping and so ***,the challenges and prospects of high-performance NVP cathode material are also put *** is believed that this review can provide a useful reference for designing and developing high-performance NVP cathode material toward the large-scale application in SIBs.

关键词： Sodium-ion batteries Na_(3)V_(2)(PO_(4))_(3) Cathode materials Electrochemical performance Optimization strategies

Co/Co_(7)Fe_(3)heterostructures with controllable alloying degree on carbon spheres as bifunctional electrocatalyst forrechargeable zinc-air batteries

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 476-487页

作者： Junkang Chen Yongyue Zhuang Yanxin Qiao Yu Zhang Aihua Yuan hu Zhou School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Exploring efficient and nonprecious metal electrocatalysts of oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is crucial for developing rechargeable zinc-air batteries(ZABs).Herein,an alloying-degree control strategy was employed to fabricate nitrogen-doped carbon sphere(NCS)decorated with dual-phase Co/Co_(7)Fe_(3)heterojunctions(CoFe@NCS).The phase composition of materials has been adjusted by controlling the alloying *** optimal CoFe_(0.08)@NCS electrocatalyst displays a half-wave potential of 0.80 V for ORR and an overpotential of 283 mV at 10 mA·cm^(-2)for OER in an alkaline *** intriguing bifunctional electrocatalytic activity and durability is attributed to the hierarchically porous structure and interfacial electron coupling of highly-active Co_(7)Fe_(3)alloy and metallic Co *** the CoFe_(0.08)@NCS material is used as air-cathode catalyst of rechargeable liquid-state zinc-air battery(ZAB),the device shows a high peak power-density(157 mW·cm^(-2))and maintains a stable voltage gap over 150 h,outperforming those of the benchmark(Pt/C+RuO_(2))-based *** particular,the as-fabricated solid-state flexible ZAB delivers a reliable compatibility under different bending *** work provides a promising strategy to develop metal/alloy-based electrocatalysts for the application in renewable energy conversion technologies.

关键词： bifunctional electrocatalysts oxygen reduction reaction oxygen evolution reaction zinc-air battery metal/alloy carbon sphere

Trees with Non-regular Fractal Boundary

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Acta Mathematica Sinica,English Series 2008年第8期24卷 1345-1350页

作者： jing hu YU yi Ming DING Department of Mathematics School of Sciences Wuhan University of Technology Wuhan 430070 P. R. China Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 P. R. China

For any given 0 〈α 〈 β 〈 ∞, we construct a tree such that under tree metric, the Hausdorff dimension of the corresponding boundary is α, but both the Packing dimension and the boxing dimension are β. Applying the connection between tree and iterated functions system, non- regular fractal sets on real line are constructed. Moreover, the method adopted in our paper is different from those which have been used before for constructing non-regular fractal set in general metric space.

关键词： tree boundary fractal dimensions non-regularity recursive structures

Is it possible to foot reflexology for infants with sensorineural hearing loss?

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World Journal of Clinical Cases 2025年第2期13卷 1-4页

作者： Min Ai Hang-Hang Zhang Jun-Bang Feng Chuan-Ming Li Wen-jing Wang Meng-Die hu Department of Anesthesiology Nanan District People's Hospital of ChongqingChongqing 400060China Department of Breast and Thyroid Surgery Chongqing Bishan District Maternal and Child Health Care HospitalChongqing 402760China Department of Medical Imaging Chongqing University Central HospitalChongqing 400014China

Foot reflexology is a non-invasive and safe complementary therapy that works by massaging the reflex zones of the feet and exerts systemic or whole-body regulation through meridian nerve *** therapy is commonly used in the treatment of various conditions such as autism and Parkinson's ***,there is limited reporting on the use of foot reflexology therapy for infants with sensorineural hearing loss(SNHL).Currently,there is no definitive conclusion on how foot reflexology therapy can influence *** editorial holds some guiding significance regarding this clinical *** aim is to present physiological evidence of how foot reflexology therapy can impact infants with SNHL,thereby enhancing clinician’s awareness of foot reflexology in treating infants with SNHL.

关键词： Foot reflexology Sensorineural Hearing Loss Future perspectives Limitations Neural conduction