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PM_(10)Observed at a Meteorological Station in Beijing:Historical Trend and Implications

Journal of Tropical Meteorology 2022年第2期28卷 207-217页

作者： NAN Xue-jing LIN Wei-li HE xiao-lei LEI yong Andrea MERLONE Meteorological Observation Centre China Meteorological AdministrationBeijing 100081 China Key Laboratory of Ecology and Environment in Minority Areas(Minzu University of China) National Ethnic Affairs CommissionBeijing 100081 China Istituto Nazionale di Ricerca Metrologica Torino 10135Italy and Istituto di Scienze PolariConsiglio Nazionale delle RicercheVenezia Mestre 30172 Italy

Inhalable particles(PM_(10)),with aerodynamic equivalent diameters that are generally 10 micrometers or smaller,are basic pollutants in many areas,especially in northern China,and thus the pollution from PM_(10)inhalable particulate matter is a growing concern for public *** long-term observations are necessary to evaluate the efficacy of PM_(10)reduction *** in the PM_(10)concentration from 2006 to 2017 at an observation station(NJ)in Beijing were recorded and *** average value±1 standard deviation of daily mean PM_(10)concentrations was 138.8±96.1μg m^(-3)for 1307 days(accounting for 34.7%of the total days),showing PM_(10)concentration exceeding the National Ambient Air Quality Standard(NAAQS)24-h average of 150μg m^(-3).Particulate concentration depended upon various meteorological conditions as also observed in this work:at low wind speed(4 m s^(-1)),the values increased by 49μg m^(-3)per unit of wind *** Beijing,air masses from northwest China,especially from the Gobi Desert and other desert areas,had net contributions to long-range transport of natural dust,enhancing the PM_(10)concentrations by up to 29%.Overall,PM_(10)mass concentration showed a significant downward trend with-8.0μg/m3/yr from 2006 to *** with higher fluctuations in recorded data,similar downward trends derived from the government released data were also found at the nearby *** result delivered a proof of efficacy for the reduction actions recently adopted to limit PM_(10)concentrations in *** significant difference of diurnal changes in PM_(10) concentrations was also found in two periods of 2006-2011 and 2012-2017,which might be due to the different contributions of fugitive ***,further efforts,especially on controlling fugitive dust,should be planned as the PM_(10) concen

关键词： Beijing PM_(10)concentration long-term trend atmospheric particulate

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减轮SKINNY-128-384算法的中间相遇攻击

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密码学报 2021年第2期8卷 338-351页

作者：肖钰汾田甜战略支援部队信息工程大学郑州450001

本文研究了SKINNY算法的中间相遇攻击.中间相遇攻击广泛用于基于SPN结构的分组密码的安全性分析中.2018年亚密会上,史丹萍等人提出了SKINNY算法的中间相遇攻击.通过自动化搜索的方法,史丹萍等人结合算法中可利用的相关约束条件,给出了22... 详细信息

本文研究了SKINNY算法的中间相遇攻击.中间相遇攻击广泛用于基于SPN结构的分组密码的安全性分析中.2018年亚密会上,史丹萍等人提出了SKINNY算法的中间相遇攻击.通过自动化搜索的方法,史丹萍等人结合算法中可利用的相关约束条件,给出了22轮SKINNY-128-384算法的中间相遇攻击.然而,在其中间相遇区分器的搜索过程中没有考虑轮密钥的猜测,仅通过猜测部分状态值确定中间相遇区分器.针对这一点,本文对自动化搜索SKINNY算法中间相遇区分器的方法进行了改进,将搜索过程中一部分状态的猜测转化为密钥的猜测,同时结合密钥桥技术,降低了密钥的猜测量,从而达到降低区分器存储复杂度的目的.本文所给出的SKINNY-128-384中间相遇攻击在不增大数据复杂度和时间复杂度的情况下,降低了攻击过程中的存储复杂度.

关键词： SKINNY算法中间相遇攻击自动化搜索密钥桥技术

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Accuracy of routine multidetector computed tomography to identify arterial variants in patients scheduled for pancreaticoduodenectomy

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World Journal of Gastroenterology 2015年第3期21卷 969-976页

作者： Feng Yang Yang Di Ji Li xiao-Yi Wang Lie Yao Si-Jie Hao yong-Jian Jiang Chen Jin De-Liang Fu Department of Pancreatic Surgery Pancreatic Disease InstituteHuashan HospitalShanghai Medical CollegeFudan University

AIM:To assess the efficacy of cross-sectional multidetector computed tomography(MDCT) imaging without arterialreconstruction to identify aberrant right hepatic artery(RHA) and celiac artery stenosis(CAS) in patients scheduled for ***:Patients with peri-ampullary and pancreatic head tumors who underwent routine preoperative MDCT and subsequent computed tomography(CT) angiography(CTA),conventional angiography or pancreaticoduodenectomy between September 2007 and August 2013 were *** analysis of imaging data was undertaken using CTA,conventional angiographic and surgical findings as the reference *** accuracy,sensitivity,specificity,positive predictive value(PPV) and negative predictive value(NPV) of MDCT in evaluation of aberrant RHA and CAS were ***:A group of 458 patients met the inclusion criteria of this study to detect aberrant RHA,and 181 cases were included to identify ***-four(11.8%) patients were confirmed to have aberrant RHA,while 12(6.6%) patients with CAS were *** yielded an accuracy of 98.5%,sensitivity of 96.3% and specificity of 98.8% in the detection of aberrant *** sensitivity,specificity,PPV and NPV of MDCT for detecting CAS were 58.3%,98.2%,70% and 97.1%,***:Routine MDCT is recommended such that surgeons and radiologists be alerted to the importance of arterial variants on preoperative CT scans in patients scheduled for pancreaticoduodenectomy.

关键词： Pancreaticoduodenectomy Aberrant hepatic artery Ce

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音频大地电磁法强干扰压制试验研究

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地球物理学报 2015年第12期58卷 4636-4647页

作者：汤井田刘子杰刘峰屹肖晓李晋张林成谢勇中南大学有色金属成矿预测与地质环境监测教育部重点实验室长沙410083 中南大学地球科学与信息物理学院长沙410083 湖南师范大学物理与信息科学学院长沙410081 长沙航空职业技术学院长沙410124

压制非相关噪声已经有多种比较成熟的技术方法,如多次叠加、远参考、Robust阻抗估计等,但这些方法对压制矿集区存在的强电磁噪声(通常属于相关噪声)基本没有效果.本文在前期提出的针对矿集区大地电磁强噪声压制的数学形态滤波基础上,开... 详细信息

压制非相关噪声已经有多种比较成熟的技术方法,如多次叠加、远参考、Robust阻抗估计等,但这些方法对压制矿集区存在的强电磁噪声(通常属于相关噪声)基本没有效果.本文在前期提出的针对矿集区大地电磁强噪声压制的数学形态滤波基础上,开展了音频大地电磁法强干扰压制的试验研究.在四川西昌某AMT测点附近,布置了大功率电磁发送站,通过接地导线向地下供20A的方波电流,同时在供电期和间歇期用凤凰公司MTU-5A仪器观测4个水平分量的电磁场.在室内采用数学形态滤波和阈值法相结合的手段在时间域对含有人工源强干扰的电磁场数据进行处理,以视电阻率对比、频谱和极化方向等参数对处理效果进行评价.结果表明:结构元素恰当的数学形态滤波可以对人工源强干扰进行识别、去除,阈值法则可以消除形态滤波后的脉冲干扰,二者结合可以有效地压制AMT中的强干扰噪声,提高数据可靠性.本文结果对AMT实际资料处理具有重要的实用和参考价值.

关键词：音频大地电磁法(AMT) 强电磁干扰数学形态滤波阈值

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大地电磁阻抗估计方法对比

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中国有色金属学报 2013年第9期23卷 2351-2358页

作者：汤井田张弛肖晓刘祥中南大学地球科学与信息物理学院有色金属成矿预测教育部重点实验室长沙410083

比较了几种大地电磁阻抗估计方法的性能。为了给阻抗估计结果提供对照标准,首先介绍大地电磁模拟数据的生成方法,并从含噪数据中提取典型的噪声时间序列;然后介绍最小二乘估计、M回归估计、有界影响估计和重复中值估计这4种回归方法的... 详细信息

比较了几种大地电磁阻抗估计方法的性能。为了给阻抗估计结果提供对照标准,首先介绍大地电磁模拟数据的生成方法,并从含噪数据中提取典型的噪声时间序列;然后介绍最小二乘估计、M回归估计、有界影响估计和重复中值估计这4种回归方法的基本原理,并用一组标准数据测试了它们的性能;最后采用4种估计方法处理不同程度加噪的模拟数据,与模拟结果进行比较。结果表明:重复中值估计的稳健性最优;当磁道存在噪声时,有界影响估计给出了明显优于M回归估计的结果,也能满足要求。因此,在实测数据处理中,推荐使用重复中值估计方法与有界影响估计方法。

关键词：大地电磁稳健阻抗估计 M回归估计有界影响估计重复中值估计

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A practical guide to promote informatics-driven efficient biotopographic material development

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Bioactive Materials 2022年第2期7卷 515-528页

作者： Yuanlong Guo Jiaomei Mi Chen Ye yong Ao Mengru Shi Zhengjie Shan Bingzhi Li Zetao Chen Zhuofan Chen Krasimir Vasilev Yin xiao Hospital of Stomatology Guanghua School of StomatologySun Yat-sen University and Guangdong Research Center for Dental and Cranial Rehabilitation and Material EngineeringGuangzhou510055China Academic Unit of Science TechnologyEngineering and Mathematics(STEM)University of South AustraliaMawson LakesSA5095Australia Institute of Health and Biomedical Innovation Queensland University of TechnologyBrisbane4059Australia

Micro/nano topographic structures have shown great utility in many biomedical areas including cell therapies,tissue engineering,and implantable ***-assisted informatics methods hold great promise for the design of topographic structures with targeted properties for a specific medical *** benefit from these methods,researchers and engineers require a highly reusable“one structural parameter-one set of cell responses”***,existing confounding factors in topographic cell culture devices seriously impede the acquisition of this kind of *** carefully dissecting the confounding factors and their possible reasons for emergence,we developed corresponding guideline requirements for topographic cell culture device development to remove or control the influence of such *** on these requirements,we then suggested potential strategies to meet *** this work,we also experimentally demonstrated a topographic cell culture device with controlled confounding factors based on these guideline requirements and corresponding strategies.A“guideline for the development of topographic cell culture devices”was summarized to instruct researchers to develop topographic cell culture devices with the confounding factors removed or well *** guideline aims to promote the establishment of a highly reusable“one structural parameter-one set of cell responses”database that could facilitate the application of informatics methods,such as artificial intelligence,in the rational design of future biotopographic structures with high efficacy.

关键词： Biotopographic materials Cell culture device Confounding factor Database Informatics

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Beyond microbial carbon use efficiency

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National Science Review 2024年第4期11卷 33-35页

作者： Ke-Qing xiao Chao Liang Zimeng Wang Jingjing Peng Yao Zhao Ming Zhang Mingyu Zhao Shuiqing Chen yong-Guan Zhu Caroline L.Peacock State Key Lab of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of Sciences University of Chinese Academy of Sciences Institute of Applied Ecology Chinese Academy of Sciences Department of Environmental Science and Engineering Fudan University College of Resources and Environmental Sciences China Agricultural University State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences State Key Laboratory of Agricultural Microbiology College of Resources and Environment Huazhong Agricultural University Key Laboratory of Cenozoic Geology and Environment Institute of Geology and Geophysics Chinese Academy of Sciences School of Earth and Environment University of Leeds

Microbial carbon use efficiency (CUE)is defined as the proportion of microbial biomass growth C versus substrate C uptake, and thus provides a useful measure of microbially driven accumulation and loss of soil organic carbon (SOC)[1]. In a recent study published in Nature [2],the authors used a data-driven machinelearning approach to conclude that CUE promotes global SOC storage based on a positive correlation between CUE and SOC content and that, based on sensitivity analysis, CUE is at least four times as important as six other evaluated factors,namely plant C inputs, C input allocation, non-microbial C transfer, substrate decomposability, environmental modifications and vertical transport.

关键词： beyond carbon efficiency microbial

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Investigating the Mechanism of Qu Du Qiang Fei 1 Hao Fang Formula against Coronavirus Disease 2019 Based on Network Pharmacology Method

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World Journal of Traditional Chinese Medicine 2024年第1期10卷 93-103页

作者： Yuan-Hua Wang He-Yang Zhou Jin-Yun Ma Gui-Qing Ding Hua Yu yong-Sheng Jin xiao-Dong Cheng Institute of Clinical Immunology Yue-Yang Hospital of Integrative MedicineShanghai University of Traditional Chinese MedicineShanghaiChina School of Pharmacy Naval Medical UniversityShanghaiChina

Objective:Qu Du Qiang Fei 1 Hao Fang(QDQF1)is a novel Chinese herbal medicine formula used to treat coronavirus disease 2019(COVID-19).However,the pharmacological mechanisms of action of QDQF1 remain *** objective of this study was to identify the effective ingredients and biological targets of QDQF1 for COVID-19 *** and Methods:The effective ingredients and mechanisms of action of QDQF1 were analyzed by using network pharmacology methods,which included an analysis of the effective ingredients and corresponding targets,COVID-19-related target acquisition,compound-target network analyses,protein-protein interaction network analysis,Kyoto Encyclopedia of Genes and Genomes(KEGG)and Gene Ontology(GO)enrichment analyses,and molecular docking ***:In total,288 effective QDQF1 ingredients were *** identified 51 core targets from the 148 targets through an overlap between putative QDQF1 targets and COVID-19-related *** key components,including formononetin,kaempferol,luteolin,naringenin,quercetin,and wogonin were identified through component-target network *** functional enrichment analysis of the core targets revealed 1296 items,while KEGG pathway enrichment analysis identified 148 signaling *** central targets(CCL2,CXCL8,IL1B,IL6,MAPK1,MAPK3,MAPK8,STAT3,and TNF)related to the COVID-19 pathway were identified in the KEGG pathway enrichment ***,molecular docking analysis suggested that the docking scores of the six key components to the nine central targets were better than those to ***:QDQF1 may regulate multiple immune-and inflammation-related targets to inhibit the progression of severe acute respiratory syndrome coronavirus 2,and thus,may be suitable for the treatment of COVID-19.

关键词： Coronavirus disease 2019 molecular docking molecular mechanism network pharmacology Qu Du Qiang Fei 1 Hao Fang formula

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带时间窗和随机时间车辆路径问题:模型和算法

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系统工程理论与实践 2009年第8期29卷 81-90页

作者：李相勇田澎上海交通大学安泰经济与管理学院上海200052

研究带随机车辆旅行时间、服务时间以及时间窗的车辆路径问题.根据不同的优化目标,首先给出了问题的两种数学模型描述:机会约束规划和带修正的随机规划模型.为了有效地求解该问题,提出了基于禁忌搜索的启发式算法,该算法考虑了问题的随... 详细信息

研究带随机车辆旅行时间、服务时间以及时间窗的车辆路径问题.根据不同的优化目标,首先给出了问题的两种数学模型描述:机会约束规划和带修正的随机规划模型.为了有效地求解该问题,提出了基于禁忌搜索的启发式算法,该算法考虑了问题的随机特性.在实验部分,首先给出了产生测试问题的方法,然后基于产生的测试问题给出了算法的计算结果.

关键词：车辆路径问题随机旅行时间随机服务时间时间窗禁忌搜索

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Determination of trace calcium by solid substrate-room temperature phosphorimetry

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Chinese Chemical Letters 2007年第2期18卷 195-197页

作者： Jia Ming Liu tian Long Yang xiao Mei Huang Xiu Mei Shi Zhong Bin Shi Hong Wu Guo Hui Zhu Zhi Ming Li Cui Lian Chen Department of Chemistry and Environmental Science Zhangzhou Normal College Zhangzhou 363000 China Department of Food and Biological Engineering Zhangzhou Institute of Technology Zhangzhou 363000 China

A new method for the determination of trace calcium by solid substrate-room temperature phosphorimetry is established. It is based on the fact that chromeazurols azurol S-phenanthroline-NaCMC (CAS-phen-NaCMC) system can emit strong and stable room temperature phosphorescence (RTP) on the solid substrate in the filter paper. Ca(2+) and phenanthroline can form complex ion Ca(phen)3(2+), which will form complex [Ca(phen)3(CAS)2] with CAS. In the result, the number of CAS molecules in each spot increased, causing sharp increase of the RTP signal of the CAS-phen-NaCMC system.

关键词： Calcium Solid substrate-room temperature phosphorimetry Sodium carboxymethyl cellulose

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