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拉贝洛尔联合硝苯地平治疗子痫前期的临床效果

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实用妇科内分泌电子杂志 2023年第17期10卷 71-73页

作者：王贻英滕娟同济大学附属东方医院胶州医院产科山东青岛266300

目的探讨拉贝洛尔联合硝苯地平治疗子痫前期的临床效果。方法选取本院64例子痫前期孕妇为研究对象,根据随机数字表法分为两组,各32例。参照组接受拉贝洛尔治疗,试验组接受拉贝洛尔联合硝苯地平治疗,比较两组的血压水平、不良妊娠结局。... 详细信息

目的探讨拉贝洛尔联合硝苯地平治疗子痫前期的临床效果。方法选取本院64例子痫前期孕妇为研究对象,根据随机数字表法分为两组,各32例。参照组接受拉贝洛尔治疗,试验组接受拉贝洛尔联合硝苯地平治疗,比较两组的血压水平、不良妊娠结局。结果治疗后,试验组收缩压、舒张压、24h蛋白尿水平均低于参照组,差异有统计学意义(P<0.05);试验组不良妊娠结局发生率为6.25%,显著低于参照组的25.00%,差异有统计学意义(P<0.05)。结论拉贝洛尔联合硝苯地平治疗子痫前期,能降低孕妇的血压、24h蛋白尿水平,减少不良妊娠结局的发生。

关键词：子痫前期硝苯地平拉贝洛尔治疗效果

基于孪生注意力网络的高分辨率遥感影像变化检测

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自然资源遥感 2022年第1期34卷 61-66页

作者：薛白王懿哲刘书含岳明宇王艺颖赵世湖自然资源部国土卫星遥感应用中心北京100048

随着遥感影像空间分辨率的提升,地物成像特征愈加复杂,基于纹理表达和局部语义等技术的变化检测方法已很难满足需求。为提升高分辨率遥感影像的变化检测精度,构建了一套较大规模的0.8~2 m高分辨率遥感人类活动变化检测数据集(HRHCD-1.0)... 详细信息

随着遥感影像空间分辨率的提升,地物成像特征愈加复杂,基于纹理表达和局部语义等技术的变化检测方法已很难满足需求。为提升高分辨率遥感影像的变化检测精度,构建了一套较大规模的0.8~2 m高分辨率遥感人类活动变化检测数据集(HRHCD-1.0);同时将空间注意力和通道注意力机制引入孪生变化检测网络中,设计了具有更强上下文变化语义特征提取能力的孪生注意力变化检测网络。模型对比实验中,孪生注意力变化检测模型相比非注意力机制模型在验证集上平均交并比提升24%,检测结果更完整,有效缓解了非注意力模型边界较差、局部漏检和空洞等问题。后处理方法对检测结果的小图斑去除、填洞和图形学平滑等处理,提升了图斑图形效果。变化检测训练中样本量增加对于模型应用的精度和泛化能力有显著提升作用。

关键词：高分辨率遥感影像变化检测深度学习注意力机制

The reformation of catalyst:From a trial-and-error synthesis to rational design

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Nano Research 2024年第4期17卷 3261-3301页

作者： Ligang wang Jiabin Wu Shunwu wang Huan Liu Yao wang Dingsheng wang Department of Chemistry Tsinghua UniversityBeijing 100084China

The appropriate catalysts can accelerate the reaction rate and effectively boost the efficient conversion of various molecules,which is of great importance in the study of chemistry,chemical industry,energy,materials and environmental ***,efficient,environmentally friendly,and easy to operate synthesis methods have been used to prepare various types of *** previous studies have reported the synthesis and characterization of the aforementioned catalysts,more still remain in trial and error methods,without in-depth consideration and improvement of traditional synthesis ***,we comprehensively summarize and compare the preparation methods of the trial-and-error synthesis strategy,structure–activity relationships and density functional theory(DFT)guided catalysts rational design for nanomaterials and atomically dispersed *** also discuss in detail the utilization of the nanomaterials and single atom catalysts for converting small molecules(H_(2)O,O_(2),CO_(2),N_(2),etc.)into value-added products driven by electrocatalysis,photocatalysis,and ***,the challenges and outlooks of mass preparation and production of efficient and green catalysts through conventional trial and error synthesis and DFT theory are featured in accordance with its current development.

关键词： trial-and-error synthesis structure–activity relationships density functional theory(DFT)guidance nanomaterials atomically dispersed catalysts

农村电商直播助推乡村振兴发展的思考——以河北省为例

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全国流通经济 2022年第4期 17-20页

作者：王艺颖许茜河北女子职业技术学院河北石家庄050000

河北省县域产业规模和电子商务交易额居全国靠前位置。随着直播电商的快速兴起,各地开始重视通过电商直播的方式来带动当地农业产业发展,进而推动乡村振兴的发展。本文探索河北省农村电商直播发展现状,分析当前河北省农村电商直播发展... 详细信息

河北省县域产业规模和电子商务交易额居全国靠前位置。随着直播电商的快速兴起,各地开始重视通过电商直播的方式来带动当地农业产业发展,进而推动乡村振兴的发展。本文探索河北省农村电商直播发展现状,分析当前河北省农村电商直播发展存在的一些问题,并从直播人设、直播内容、直播培训及专业化运营方面提出具体对策,对推动河北省电商直播赶超发展有重要的启发意义。

关键词：乡村振兴产业发展电商直播农村电商

Numerical Analysis of PRISM-PY Calculations for Hard-and Soft-Core Generic Polymer Models

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Chinese Journal of Polymer Science 2024年第4期42卷 532-543页

作者： Qiang wang Department of Chemical and Biological Engineering Colorado State University1370 Campus DeliveryFort CollinsCO80523-1370USA

Generic polymer models capturing the chain connectivity and excluded-volume interactions between polymer segments can be classified, according to whether or not the 3D integral of the latter diverges, into hard- and soft-core models. Taking homogeneous systems of compressible homopolymer melts (or equivalently homopolymer solutions in an implicit, good solvent) in the continuum as an example, we recently compared the correlation effects on the structural and thermodynamic properties of the hard- and soft-core models given by the polymer reference interaction site model (PRISM) theory with the Percus-Yevick (PY) closure (Polymers 2023, 15, 1180). Here we analyzed in detail the numerical errors and behavior of the interchain pair correlation functions (PCFs) given by the PRISM-PY calculations of these models using an efficient numerical approach that we proposed. Our numerical approach has the least number of independent variables to be iteratively solved, analytically treats the discontinuities caused by the non-bonded pair potential (such as that of the hard spheres) and takes only the inverse Fourier transform of the interchain indirect PCF between polymer segments (which is continuous and decays towards 0 with increasing wavenumber much faster than both the interchain direct and total PCFs), and is essential for us to accurately solve the PRISM-PY theory for chain length N as large as 106. To capture the correlation-hole effect, the real-space cut-off in the PRISM calculations should be proportional to the square root of N.

关键词： Generic polymer models Soft potentials Polymer reference interaction site model theory

Linear-Quadratic Pareto Cooperative Game for Mean-Field Backward Stochastic System

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Journal of Systems Science & Complexity 2024年第3期37卷 947-964页

作者： wang Yu School of Control Science and Engineering Shandong UniversityJinan 250061China

This paper focuses on a Pareto cooperative differential game with a linear mean-field backward stochastic system and a quadratic form cost functional. Based on a weighted sum optimality method, the Pareto game is equivalently converted to an optimal control problem. In the first place,the feedback form of Pareto optimal strategy is derived by virtue of decoupling technology, which is represented by four Riccati equations, a mean-field forward stochastic differential equation(MF-FSDE),and a mean-field backward stochastic differential equation(MF-BSDE). In addition, the corresponding Pareto optimal solution is further obtained. Finally, the author solves a problem in mathematical finance to illustrate the application of the theoretical results.

关键词： Backward stochastic differential equation linear-quadratic control mean-field Pareto optimality

Light People: Professor Fanglin Bao and his cover story

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Light(Science & Applications) 2024年第6期13卷 1015-1020页

作者： Ji wang School of Science Westlake UniversityHangzhouZhejiangPR China

Qu Yuan,a renowned ancient Chinese poet,once pondered in his work Heavenly Inquiry:“If the sun’s light is absent,from where does the radiance of the Hero Flower emanate?”The ability to see clearly in the darkest of nights has long been a sought-after magical power by *** holds not only immense technological significance for computer vision and remote sensing but also profound implications for transcending the dichotomy between day and night in our daily *** Fanglin Bao from Westlake University has made significant breakthroughs in this field,bringing us closer to a world where we can transform night into *** groundbreaking research on Heat-Assisted Detection and Ranging(HADAR)and night vision was featured as the cover story in Nature on July 26,2023.

关键词： bringing breakthrough holds

A multi-source information fusion layer counting method for penetration fuze based on TCN-LSTM

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Defence Technology（防务技术） 2024年第3期33卷 463-474页

作者： Yili wang Changsheng Li Xiaofeng wang Nanjing University of Science and Technology Nanjing 210094JiangsuChina State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

When employing penetration ammunition to strike multi-story buildings,the detection methods using acceleration sensors suffer from signal aliasing,while magnetic detection methods are susceptible to interference from ferromagnetic materials,thereby posing challenges in accurately determining the number of *** address this issue,this research proposes a layer counting method for penetration fuze that incorporates multi-source information fusion,utilizing both the temporal convolutional network(TCN)and the long short-term memory(LSTM)recurrent *** leveraging the strengths of these two network structures,the method extracts temporal and high-dimensional features from the multi-source physical field during the penetration process,establishing a relationship between the multi-source physical field and the distance between the fuze and the target plate.A simulation model is developed to simulate the overload and magnetic field of a projectile penetrating multiple layers of target plates,capturing the multi-source physical field signals and their patterns during the penetration *** analysis reveals that the proposed multi-source fusion layer counting method reduces errors by 60% and 50% compared to single overload layer counting and single magnetic anomaly signal layer counting,*** model's predictive performance is evaluated under various operating conditions,including different ratios of added noise to random sample positions,penetration speeds,and spacing between target *** maximum errors in fuze penetration time predicted by the three modes are 0.08 ms,0.12 ms,and 0.16 ms,respectively,confirming the robustness of the proposed ***,the model's predictions indicate that the fitting degree for large interlayer spacings is superior to that for small interlayer spacings due to the influence of stress waves.

关键词： Penetration fuze Temporal convolutional network(TCN) Long short-term memory(LSTM) Layer counting Multi-source fusion

Assessment of tree-ring mercury radial translocation and age effect in Masson pine:Implications for historical atmospheric mercury reconstruction

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Journal of Environmental Sciences 2024年第4期138卷 266-276页

作者： Xu Liu Xun wang Dingyong wang College of Resources and Environment Southwest UniversityChongqing 400715China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China

The tree ring has been regarded as an emerging archive to reconstruct historical atmospheric mercury(Hg)trends,but with the large knowledge gaps in the *** this study,we comprehensively evaluated the Hg source,radial translocation and age effect of Masson pine(Pinus massoniana)tree ring at *** in Chongqing,to assess the suitability of such tree ring as the archive of atmospheric *** showed that distinct variabilities among Masson pine tree-ring Hg concentration *** Hg concentration significantly increased along with stem height(P<0.05),indicating the Hg in tree rings mainly derived from foliage uptake atmospheric *** found a distinct age effect that the tree ring of young trees had the higher Hg ***,we used the advection-diffusion model to demonstrate how Hg concentration shifted by the advection or/and diffusion in tree *** modeling results showed that the advection induced radial translocation during the young growth period of tree was a plausible mechanism to result in the tree-ring Hg record largely different from the trend of anthropogenic Hg emissions in *** finally suggest that in further Hg dendrochemistry,better discarding the tree-ring Hg profile of the young growth period to reduce impacts of the radial translocation and age effect.

关键词： Masson pine Tree-ring mercury Radial translocation Tree age effect