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Ingredients-based Methodology and Fuzzy Logic Combined Short-Duration Heavy Rainfall Short-Range Forecasting:An Improved Scheme

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Journal of Tropical Meteorology 2024年第3期30卷 241-256页

作者： TIAN Fu-you XIA Kun sun jian-hua ZHENG Yong-guang hua Shan National Meteorological Center Beijing100081 China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of Sciences(IAP/CAS)Beijing 100029 China Key Laboratory of Cloud-Precipitation Physics and Severe Storms(LACS) Institute of Atmospheric PhysicsChinese Academy of Sciences(IAP/CAS)Beijing 100029 China

Short-duration heavy rainfall(SHR),as delineated by the National Meteorological Center of the China Me-teorological Administration,is characterized by hourly rainfall amounts no less than 20.0 *** is one of the most common convective weather phenomena that can cause severe ***-range forecasting of SHR is an important part of operational severe weather *** the present study,an improved objective SHR forecasting scheme was developed by adopting the ingredients-based methodology and using the fuzzy logic *** 1.0°×1.0°National Centers for Environmental Prediction(NCEP)final analysis data and the ordinary rainfall(0.1-19.9 mm h-1)and SHR observational data from 411 stations were used in the improved *** best lifted index,the total precipitable water,the 925 hPa specific humidity(Q 925),and the 925 hPa divergence(DIV 925)were selected as predictors based on objective *** distributed membership functions of predictors were obtained based on relative frequency *** weights of predictors were also objectively *** with a typhoon SHR case and a spring SHR case show that the main possible areas could be captured by the improved *** of SHR forecasts within 96 hours with NCEP global forecasts 1.0°×1.0°data initiated at 08:00 Beijing Time during the warm seasons in 2015 show the results were improved from both deterministic and probabilistic *** study provides an objectively feasible choice for short-range guidance forecasts of *** scheme can be applied to other convective phenomena.

关键词： ingredients-based methodology fuzzy logic approach probability of short-duration heavy rainfall(SHR) improved forecasting scheme objectively obtained membership functions

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传统民本思想的创造性转化与创新性发展——基于农村土地制度改革的视角

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南京大学学报（哲学．人文科学．社会科学） 2024年第3期61卷 5-14页

作者：孙建华刘青玉苏州大学马克思主义学院、江苏省习近平新时代中国特色社会主义思想研究中心苏州大学基地江苏省苏州市2150006 上海财经大学马克思主义学院上海市200433

中国共产党坚持把马克思主义基本原理同中国具体实际相结合、同中华优秀传统文化相结合,充分发挥党的核心主体作用,立足人民至上的基本立场,尊重和相信人民群众在推动历史发展中的强大力量,坚持问题导向和找准抓手回应时代问题,在继承... 详细信息

中国共产党坚持把马克思主义基本原理同中国具体实际相结合、同中华优秀传统文化相结合,充分发挥党的核心主体作用,立足人民至上的基本立场,尊重和相信人民群众在推动历史发展中的强大力量,坚持问题导向和找准抓手回应时代问题,在继承中华传统优秀民本思想合理内核的基础上,创造性地将其运用于中国农村土地制度改革,出台了一系列的战略举措,成功走出了一条具有中国特色、推进共同富裕的农业现代化之路,不仅为实现中国式现代化奠定了坚实基础,也为中华优秀传统文化的创造性转化和创新性发展树立了光辉典范。

关键词：中华优秀传统文化民本思想民生问题农村土地制度

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针灸改善氧化应激作用机制的研究进展

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针刺研究 2024年第3期49卷 307-314页

作者：郭本婕孙建华裴丽霞南京中医药大学附属医院南京210029

氧化应激与多种疾病病理相关,可导致线粒体功能障碍、DNA修复受损、细胞损伤或凋亡。越来越多的证据表明针灸可以减少病理状态下生物体的氧化应激反应。本文通过整理近5年来国内外针灸改善氧化应激相关作用机制的文献,从针灸调节活性氧(... 详细信息

氧化应激与多种疾病病理相关,可导致线粒体功能障碍、DNA修复受损、细胞损伤或凋亡。越来越多的证据表明针灸可以减少病理状态下生物体的氧化应激反应。本文通过整理近5年来国内外针灸改善氧化应激相关作用机制的文献,从针灸调节活性氧(ROS)的产生,影响抗氧化酶相关途径减少ROS,修复被ROS攻击的蛋白质、脂质及DNA,抑制ROS途径下游的细胞凋亡或自噬这4个方面探讨了针灸与氧化还原生物学过程之间的联系。通过对针灸抗氧化机制最新研究进展的归纳及展望,为针灸改善氧化应激及相关疾病的深入机制研究提供一定的依据和思路。

关键词：针灸氧化应激活性氧抗氧化酶细胞凋亡

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Delta大通道内镜腰椎间盘切除术的临床研究

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中国矫形外科杂志 2024年第17期32卷 1622-1625页

作者：琚顺林王聪孙建华石河子大学医学院新疆石河子832000 石河子大学医学院第一附属医院新疆石河子832000

[目的]评价Delta大通道内镜手术治疗腰椎间盘突出症的临床疗效。[方法]回顾性分析2020年1月—2021年10月接受Delta大通道内镜治疗腰椎间盘突出症73例患者的临床资料。评估临床及影像结果。[结果]所有患者手术顺利完成。手术时间平均(78.... 详细信息

[目的]评价Delta大通道内镜手术治疗腰椎间盘突出症的临床疗效。[方法]回顾性分析2020年1月—2021年10月接受Delta大通道内镜治疗腰椎间盘突出症73例患者的临床资料。评估临床及影像结果。[结果]所有患者手术顺利完成。手术时间平均(78.1±24.0)min,术中透视次数平均(3.3±1.0)次,患者平均随访时间(18.2±5.3)个月。与术前相比,术后3个月和末次随访时腰痛VAS[(5.6±1.8),(1.8±1.0),(1.1±0.9),P0.05),但是椎间盘高度指数[(26.6±4.9)%,(28.2±5.2)%,P<0.001]显著增加。[结论]Delta大通道内镜治疗腰椎间盘突出症的疗效总体满意,可作为临床上治疗腰椎间盘突出症的微创手术方式。

关键词：腰椎间盘突出症 Delta大通道脊柱内镜椎间盘切除术

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Modeling natural convection heat transfer from perforated plates

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第5期13卷 353-360页

作者： Zan WU Wei LI Zhi-jian sun Rong-hua HONG Department of Energy Engineering Zhejiang University Hangzhou 310027 China

Staggered pattern perforations are introduced to isolated isothermal plates,vertical parallel isothermal plates,and vertical rectangular isothermal fins under natural convection *** performance of perforations was evaluated theoretically based on existing correlations by considering effects of ratios of open area,inclined angles,and other geometric *** was found that staggered pattern perforations can increase the total heat transfer rate for isolated isothermal plates and vertical parallel plates,with low ratios of plate height to wall-to-wall spacing(H/s),by a factor of 1.07 to 1.21,while only by a factor of 1.03 to 1.07 for vertical rectangular isothermal fins,and the magnitude of enhancement is proportional to the ratio of open ***,staggered pattern perforations are detrimental to heat transfer enhancement of vertical parallel plates with large H/s ratios.

关键词： Staggered pattern perforation Natural convection Inclined plate Parallel plate Rectangular fins

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海底管道疲劳裂纹扩展寿命预报的影响因素分析

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舰船科学技术 2024年第1期46卷 121-125页

作者：徐媛媛孙健华张捷朱金金南通理工学院机械工程学院江苏南通226000

海底管道所处载荷环境复杂,疲劳破坏是主要失效形式之一。由于制造及环境因素,海底管道不可避免会出现裂纹缺陷,对于服役中的海底管道,预报其剩余疲劳寿命并对影响预报结果的因素进行研究具有实践意义。在保守估计法的前提下,采用MTS准... 详细信息

海底管道所处载荷环境复杂,疲劳破坏是主要失效形式之一。由于制造及环境因素,海底管道不可避免会出现裂纹缺陷,对于服役中的海底管道,预报其剩余疲劳寿命并对影响预报结果的因素进行研究具有实践意义。在保守估计法的前提下,采用MTS准则对海底管道裂纹扩展模式进行分析。利用有限元法及1/4节点位移法求解裂纹应力强度因子,随后基于Paris公式的da法对海底管道进行疲劳扩展寿命预报,最后对数值预报结果的影响因素进行探讨。结果表明,当裂纹尺寸增量Δa设置合理时,海底管道裂纹扩展寿命的预报值与试验值相接近,该数值方法能有效预报海底管道的疲劳剩余寿命。裂纹尺寸增量Δa对寿命预报影响很大,从预报精度和计算耗时两方面综合考虑给出了合理选择裂纹尺寸增量Δa的方法。形状比对管道疲劳扩展寿命的影响与初始裂纹尺寸有关。当裂纹尺寸扩展到一定值后继续增加,疲劳扩展寿命变化率并不大。所得结论为服役管道的安全性评估提供参考。

关键词：海底管道数值预报疲劳扩展寿命裂纹尺寸增量形状比

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The Characteristics of Cloud-to-Ground Lightning Activity with Severe Thunderstorm Wind in South and North China

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Atmospheric and Oceanic Science Letters 2014年第6期7卷 571-576页

作者： YANG Xin-Lin sun jian-hua Chengdu University of Information Technology Key Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric PhysicsChinese Academy of Sciences Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science & Technology

The characteristics of cloud-to-ground(CG) lightning activity with severe thunderstorm wind(STW) in South and North China are analyzed using CG lightning data, radar data, and serious weather reports. The percentage of positive CG(PCG) flashes with STW in North China is larger than that in South China. STW takes place during the period when the total CG and PCG density is increasing fastest. STW also occurs close to the high-value center of CG and PCG density. In North China, the CG and PCG density in the grid of STW maximizes approximately 20 minutes after the STW occurs; while in South China, the PCG density and percentage of PCG in the grid of STW maximizes about 10 minutes before the occurrence of STW. The high-value centers of CG density and PCG density in North China move slightly faster than those in South China, which is opposite to the rate of increasing CG activity.

关键词： cloud-to-ground lightning severe thunderstorm wind severe convection

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Advances on Seed Vigor Physiological and Genetic Mechanisms

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Agricultural Sciences in China 2007年第9期6卷 1060-1066页

作者： sun Qun WANG jian-hua sun Bao-qi Department of Seed Science College of Agriculture and Biotechnology China Agricultural University Beijing 100094 P.R.China

Seed vigor is a more promising seed quality character reflecting potential seed germination, field emergence and seed storage ability under different conditions than standard germination. Standard germination is influenced by genetic background and environmental effects during seed development and storage conditions. The latest research on physiological mechanism in seed vigor showed that at the late stage of seed development, the development of seed vigor involves some stress-resistant substances including late embryogenesis abundant （LEA） protein, oligosaccharides and abscisic acid （ABA）. Whereas the loss of seed vigor, or seed aging and deterioration, could be attributed to lipid peroxidation, chromosome deformation and genes aberrance, and embryo protein degradation, etc. Seed vigor is a quantitative character controlled by multi-genes. Genetic and quantitative trait locus （QTL） analyses on seed-vigor trait in model plants, such as Arabidopsis and rice, are mostly concentrated on related morphology traits, whereas few physiological traits have been researched. It was concluded that, all of the QTL genetic characteristics of seed vigorincluding QTL quantities, its locus on chromosome, genetic effects, and interaction effects between genetic and environment, differed with plant species and used seed-vigor traits.

关键词： seed vigor physiological and genetic mechanism QTL analyses

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Analysis of ‘9.4' unusual rainfall in Beijing during autumn 2015

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Atmospheric and Oceanic Science Letters 2016年第3期9卷 219-225页

作者： ZHAO Si-Xiong sun jian-hua LU Rong Key Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric Physics Chinese Academy of Sciences Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and Technology College of Earth Science University of Chinese Academy of Sciences

In this paper, an unusual rainfall in Beijing that occurred on 4 September(‘9.4') 2015 is studied to clarify the reasons for such a strong rainfall in autumn. It was indicated that various factors, including stationary westerlies disturbance(i.e. low in the west and high in the east), forward-titling trough,warm shear line, unstable stratification and convective available potential energy release, low level jet as well as a series of mesoscale convective systems produced the strong rainfall. Ordinarily, this situation is uncommon in autumn.

关键词： Heavy rainfall forward-titlingtrough warm shear line autumn Beijing

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The Freezing Precipitation over the Middle-Lower Reaches of the Yangtze River during February-March 2009

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Atmospheric and Oceanic Science Letters 2009年第3期2卷 177-182页

作者： sun jian-hua ZHAO Si-Xiong Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

In this paper, the authors analyze the quasistationary fronts, surface conditions, and atmospheric stratification processes associated with a freezing precipitation event over the middle-lower reaches of the Yangtze River, especially in the Dabie mountain during February-March 2009. The long duration of freezing precipitation was primarily caused by stationary and anomalous synoptic weather patterns, such as a blocking high pressure in the northern branch and a trough in the southern branch of the westerlies, which resulted in the encounter cold air from northern China and warm moisture from the south. The east-west-oriented, quasi-stationary front （or shear line） found in central China was mostly responsible for producing the precipitation. The warm layer and nearsurface frozen layer were located in the lower troposphere along the front zone. Although the warm layer （〉 0℃） existed along the whole front, a surface temperature less than 0℃ appeared only over the lower-middle reaches of the Yangtze River, especially in the Dabie mountain. Therefore, the surface temperature was the main influencing factor, as the freezing precipitation only happened over the Dabie mountain.

关键词： freezing precipitation quasi-stationary front stratification warm layer

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