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Statistical models reveal the effects of atmospheric black carbon on glacial bacterial abundance on the Tibetan Plateau

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Journal of Earth Science 2024年

作者： Yongqin liu Baiqing Xu Mukan Ji Zhongwei Huang Siyu Chen jiming li Guannan Mao Key Laboratory of Tibetan Environment Changes and Land Surface Processes， Institute of Tibetan Plateau Research， Chinese Academy of Sciences Center for the Pan-third Pole Environment， Lanzhou University University of Chinese Academy of Sciences Key Laboratory for Semi-Arid Climate Change of the Ministry of Education， College of Atmospheric Sciences， Lanzhou University

Ice cores play an important role in the reconstruction of historical atmospheric information. The glacier of the Tibetan Plateau is influenced by the Indian monsoon and westerly winds， which divide the Tibetan Plateau into monsoon- and westly influenced regions. These atmospheric circulations bring distinct microbial communities to glaciers， with the microbial dispersal process being also influenced by atmospheric factors. However， the potential influence of between bacterial abundance and atmospheric factors is not well known. To reveal potential mechanisms controlling bacterial abundance between two regions， we obtained bacterial abundance and atmospheric records for the past 46 years from two ice cores located within these regions. Statistical regression models were constructed to fit the relationship between bacterial abundance and atmospheric factors. Generalized additive model (GAM) was superior in modeling bacterial abundance compared with linear models and showed that the key factors affecting bacterial abundance were different in the monsoon- and westerly-dominated regions. Specifically， atmospheric dust and black carbon were the key factors for the monsoon-dominated region， and westerly index was the key factor for the westerly-dominated region. The model outputs confirm that atmospheric black carbon plays an important role in affecting bacterial abundance for the glacier located within the monsoon-dominated region， particularly in recent decades. The model also predicted that bacterial abundance will increase by 27% with a doubled black carbon deposition. We quantify and model for the first time that relationship between bacterial abundance and atmospheric black carbon in Tibetan glaciers change over time based on GAM models.

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基于技能型社会建设下职业教育公共服务平台创新构建分析

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牡丹江大学学报 2024年第7期33卷 82-87页

作者：李纪明牡丹江大学黑龙江牡丹江157011

在技能型社会建设的背景下,职业教育公共服务平台的创新构建至关重要。现状分析显示,平台在功能与服务上已有一定基础,但仍面临诸多挑战。平台要紧密地结合产教融合提升教育质量并扩大覆盖面。创新构建策略应注重平台定位与功能的创新,... 详细信息

在技能型社会建设的背景下,职业教育公共服务平台的创新构建至关重要。现状分析显示,平台在功能与服务上已有一定基础,但仍面临诸多挑战。平台要紧密地结合产教融合提升教育质量并扩大覆盖面。创新构建策略应注重平台定位与功能的创新,采用先进技术支撑平台架构,并建立高效运营与管理机制。通过案例分析,本文总结了成功的实践经验,为职业教育公共服务平台的发展提供了参考。

关键词：技能型社会职业教育公共服务平台创新构建

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甲醇水蒸汽重整制氢装置及系统研究进展

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中国电机工程学报 2024年第18期44卷 7276-7292,I0015页

作者：李季铭杨扬朱恂叶丁丁陈蓉廖强低品位能源利用及系统教育部重点实验室(重庆大学) 重庆市沙坪坝区400030

氢能具有高热值、无污染的特性,是21世纪新兴发展能源之一,规模化消纳转化可再生能源新思路“液态阳光”的提出,使甲醇重整制氢能源供应体系受到广泛关注。甲醇水蒸汽重整制氢工艺因反应温度温和、产物中氢气浓度高而成为最具有商用前... 详细信息

氢能具有高热值、无污染的特性,是21世纪新兴发展能源之一,规模化消纳转化可再生能源新思路“液态阳光”的提出,使甲醇重整制氢能源供应体系受到广泛关注。甲醇水蒸汽重整制氢工艺因反应温度温和、产物中氢气浓度高而成为最具有商用前途的制氢方式之一。甲醇水蒸汽重整反应为吸热反应,不同供热方案形成了多样化制氢技术。该文以甲醇水蒸汽重整制氢所需热量来源为牵引,综述自热型甲醇水蒸汽重整制氢技术、光热转换甲醇水蒸汽重整制氢技术和余热利用型甲醇水蒸汽重整制氢技术的最新研究进展,总结并对比不同技术路线中重整反应器结构、系统设计方案及制氢性能。最后,对3种甲醇水蒸汽重整制氢技术的发展趋势及应用前景进行展望。

关键词：甲醇重整制氢热源反应器系统产氢性能

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Visual Analytics of Traffic Congestion Propagation Path with Large Scale Camera Data

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Chinese Journal of Electronics 2018年第5期27卷 934-941页

作者： SHAN Zhenyu PAN Zhigeng li Fengwei XU Huihui li jiming Hangzhou Normal University Zhejiang Police College

Congestion analysis is essential to traffic control, especially in crowded urban road network. The recent traffic forecasting methods can provide travelers and traffic managers with early congestion warning, yet unable to reveal the relationship of congestion roads. This paper presented a congestion propagation path estimation method based on greedy algorithm to quickly extract these congestion relationships for visual analytics. The data from traffic cameras are applied to build the propagation network based on a directed weighted graph. It describes the process of congestion spreading among different *** to this network, congestion propagation path predicts the process of congestion spreading between different segments. In our visual design, it is applied to demonstrate the segments that will be influenced by the congested road. This is helpful for traffic managers to make effective and efficient decisions. The experimental result shows that our method achieves high accuracy thus prove the effective for the congestion propagation method.

关键词： Congestion propagation Propagation path Intelligent transportation system Visual analytics

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赤霞珠葡萄酒颜色相关物质分析及可视化表征

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食品与发酵工业 2024年第12期50卷 127-134,I0007页

作者：高琛瑜董荣石淼李飞飞乔丹李记明庞红勋周元张珍珍新疆农业大学食品科学与药学学院新疆乌鲁木齐830000 新疆张裕巴保男爵酒庄有限公司新疆石河子832061

选取新疆天山北麓产区赤霞珠干红葡萄酒从酒精发酵结束至最终色泽衰退(深紫红色-黄褐色)过程中10款样品为试材,测定葡萄酒的基础理化指标、CIELab参数、多酚类物质含量、总色素、聚合色素等指标,针对其进行皮尔逊相关性分析,基于存在相... 详细信息

选取新疆天山北麓产区赤霞珠干红葡萄酒从酒精发酵结束至最终色泽衰退(深紫红色-黄褐色)过程中10款样品为试材,测定葡萄酒的基础理化指标、CIELab参数、多酚类物质含量、总色素、聚合色素等指标,针对其进行皮尔逊相关性分析,基于存在相关性的基础上利用偏最小二乘法-判别分析筛选样品的特征指标,最终利用可视化表征直观反映酒体颜色及特征指标相对含量。结果表明,基础理化指标、多酚类物质含量等指标与CIELab参数之间均呈现相关性。偏最小二乘法-判别分析和CIELab颜色空间表征及二维灰度图表明,酒体呈现紫红色时,酒体的主要特征指标为L^(*)(57.97~81.21)、总单宁含量(4322.66~4385.43 mg/L)。酒体呈现胭脂红色时,酒体的主要特征指标为a^(*)(14.69~16.41)、总酚含量(2157.59~2983.46 mg/L)、总单宁含量(3302.57~3459.51 mg/L)。酒体呈现宝石红色时,酒体的主要特征指标为a^(*)(18.13~20.52)、苹果酸含量(1.10~1.40 g/L)、单宁含量(4558.06~4652.22 mg/L)。酒体呈现砖红色时,酒体的主要特征指标为总单宁含量(4762.08~5185.81 mg/L)、总酚含量(3568.87~3809.33 mg/L)。当总酚含量低于2000 mg/L时,酒体黄化程度严重且不再适宜陈酿。该方法直观反映了不同色泽赤霞珠葡萄酒颜色及其特征指标信息,能够良好鉴别区分不同色泽赤霞珠葡萄酒,为构建新疆天山北麓产区不同色泽赤霞珠葡萄酒评价体系奠定基础。

关键词：葡萄酒颜色可视化表征 CIELab参数多酚类物质颜色品质评价

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新型弦支空间结构施工过程受力分析

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西安建筑科技大学学报（自然科学版） 2024年第4期56卷 578-585,603页

作者：周春娟魏超琪柳明亮李纪明惠存陕西省建筑科学研究院有限公司陕西西安710082 长安大学建筑工程学院陕西西安710061 中原工学院建筑工程学院河南郑州450007 北京工业大学空间结构研究中心北京100124

西北大学长安校区体育馆为新型弦支空间结构,其屋盖结构部分上部由辐射状倒三角管桁架结构组成,下部由环向索及径向索组成,上部结构与下部结构之间通过竖向撑杆连接,是一种复杂的空间预应力结构体系.采用有限元软件对该结构进行了施工... 详细信息

西北大学长安校区体育馆为新型弦支空间结构,其屋盖结构部分上部由辐射状倒三角管桁架结构组成,下部由环向索及径向索组成,上部结构与下部结构之间通过竖向撑杆连接,是一种复杂的空间预应力结构体系.采用有限元软件对该结构进行了施工过程仿真分析,研究了不同施工阶段结构的应力和变形;并对拉索分级张拉产生的结构应力与变形进行了分析,研究了不同卸载方案对结构性能的影响,提出了合理的结构卸载方案.结果表明:结构安装所采用的旋转累积滑移施工成型方案是合理的,施工过程中结构应力和变形较小;结构整体刚度随施工过程不断增大,应力呈现不均匀分布.施工过程仿真分析可以为结构现场安装提供指导与预警,为同类工程建造提供技术参考.

关键词：新型弦支空间结构辐射状倒三角桁架施工过程结构卸载累积滑移

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Second organic aerosol formation by irradiation of α-pinene-NO_x-H_2O in an indoor smog chamber for atmospheric chemistry and physics

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Chinese Science Bulletin 2008年第21期53卷 3294-3300页

作者： ZHAO Zhe HAO jiming li JunHua WU Shan Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China

Ozone(O3) and secondary organic aerosol(SOA) are considered to be the most serious secondary air pollutants of concern in most metropolitan areas,as well as for *** this study,O3 and SOA for-mation potential of α-pinene,the most abundant biogenic VOCs,is investigated at Tsinghua Indoor Chamber *** experiments were conducted under atmospheric relevant HCs/NOx ratios in both presence and absence of ammonia sulfate seed aerosol.A Scanning Mobility Particle Sizer system(3936,TSI) and a Condensation Particle Counter(3010,TSI) were used to study the SOA formation and a gas chromatograph(GC) equipped with a DB-5 column and a flame ionization detector(FID) was used to measure α-pinene *** results show that the presence of ammonia sulfate seed aerosol did not change the formation trend of O3,but significantly contribute to SOA formation.A strong linear relationship(r2 = 0.90) between SOA yield enhancement(△Y*) and surface concentration of seed aerosol(PMi,s)has been found,denoting that the PMi,s is the control factor for SOA yield *** the possible reason for the enhancement is acid-catalyzed heterogeneous reactions.

关键词：种子微粒物气溶胶照射 a-蒎烯-NOx-H2O 化学

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FACT:An Air-Ground Communication Framework for Seeding Quality Control of Aircraft

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Computer Systems Science & Engineering 2022年第5期41卷 539-555页

作者： Dequan li jiming li Xu Zhou Jin Rong Hu Xin Wang Jing Duan State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing100081China Key Laboratory for Cloud Physics of China Meteorological Administration Beijing100081China Chengdu University of Information Technology Chengdu610225China Curacloud Corporation SeattleWA98104USA

A new type of air-ground communication application framework named FACT(framework for air-ground communication technology with weather-modification aircraft)is presented to track and command weather-modification aircraft to perform ideal cloud *** provides a set of solutions from three perspectives,namely,onboard,onground and air-to-ground,with the core purpose of solving the problems of the rapid exchange of information,contract analysis and identifying potential seeding areas when flight plans and meteorological conditions *** board,the observed data are processed centrally and transmitted downward through air-to-ground *** real-time application and sharing of aircraft detection data are strengthened on the ground,and potential areas of operation are automatically identified based on ground *** communication between the air and the ground achieves a technical breakthrough by realizing double satellite links,adaptive data transmission and VPN channel ***,an application based on FACT is designed and implemented for the real-time command of weather-modified *** approach has become the key air-to-ground communication system support for more than 40 Chinese aircraft and the big data service support center of airborne data to ensure improved operation of weather-modification aircraft in China.

关键词： Air-ground communication application framework aircraft operation data transmission and analysis

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秋闲期复种翻压绿肥对后茬作物春小麦产量、氮残留和N_(2)O排放的影响

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青海大学学报 2024年第1期42卷 9-16页

作者：肖玉涛李正鹏严清彪李积铭韩梅青海大学农林科学院青海西宁810016 青海大学农牧学院青海西宁810016

为探索适宜于青海高原春小麦的绿肥还田方式,本研究于2021—2022年进行田间试验,设置6个处理:常规施肥100%(F100)、70%(F70)、0%(F0),复种翻压绿肥配施化肥100%(F100+G)、70%(F70+G)、0%(F0+G),分析在不同处理下苗期、花期和收获期0~100... 详细信息

为探索适宜于青海高原春小麦的绿肥还田方式,本研究于2021—2022年进行田间试验,设置6个处理:常规施肥100%(F100)、70%(F70)、0%(F0),复种翻压绿肥配施化肥100%(F100+G)、70%(F70+G)、0%(F0+G),分析在不同处理下苗期、花期和收获期0~100 cm土层硝态氮和铵态氮的含量,以及春小麦整个生育期N_(2)O的排放特征和小麦产量。结果表明:在复种翻压绿肥处理下春小麦穗数、穗粒数、千粒重和产量均显著提高(PF100+G>F70>F0+G>F100>F0。复种翻压绿肥配施化肥较单施化肥减少了农田N_(2)O的排放,其中F70+G处理的N_(2)O排放量较F70处理显著减少(P<0.05)。同时,F70+G处理的N_(2)O排放强度最低。因此,复种翻压绿肥配施70%化肥为青海高原春小麦最佳栽培方式。

关键词：小麦产量硝态氮铵态氮 N2O

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Seasonal variation in particle contribution and aerosol types in Shanghai based on satellite data from MODIS and CAliOP

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Particuology 2020年第4期18卷 18-25页

作者： Qiong liu Xin liu Tongqiang liu Yanming Kang Yonghang Chen jiming li Hua Zhang College of Environmental Science and Engineering Donghua UniversityShanghaiChina College of Information Science and Technology Donghua UniversityShanghaiChina Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric Sciences Lanzhou UniversityLanzhouChina State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijingChina

Although the concentration of atmospheric particulate matter in Shanghai has declined in recent years,aerosols remain one of the major pollutants affecting air ***,spatio-seasonal variation in aerosol optical properties and aerosol types were studied overa 10-year period(2006-2015)in Shanghai,China,using satellite data from Moderate Resolution Imaging Spectroradiometer(MODIS)and CloudAerosol lidar with Orthogonal Polarization(CAliOP).The average aerosol optical depth values for central urban and suburban areas of Shanghai were between 0.9 and *** seasonal variation in aerosol concentrations occurred,causing strongest attenuation in summer and weakest attenuation in *** dust,polluted continental(urban/industrial)and smoke aerosols were the main aerosol *** dust aerosols occurred in the Shanghai area at higher altitudes(greater than 3 km)in spring,related to dusty weather in the north;while in winter,smoke aerosols occurred at high altitudes,related to haze pollution in the *** aerosols detected in autumn were mainly from local sources,comprising polluted dust,polluted continental,and smoke *** in Shanghai clearly reflect both local and regional sources at different times.

关键词： Aerosol optical depth(AOD) Aerosol type Attenuation Seasonal variation Vertical distribution

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