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Exploring the metallurgical coke thermal properties in viewpoint of experiment and molecular simulation

CHINESE JOURNAL OF CHEMICAL ENGINEERING 2024年第11期75卷 253-265页

作者： Lei, Zhao yue, qiannan Pei, Qin Chen, Ji Ling, Qiang Lei, Liu Zhu, Gangli Cui, Ping Anhui Univ Technol Sch Chem & Chem Engn Anhui Key Lab Coal Clean Convers & Utilizat Maanshan 243002 Peoples R China Wanjiang Univ Technol Sch Finance & Econ Maanshan 243002 Peoples R China Shanxi Design & Res Inst Bldg Mat Ind Xian 710032 Peoples R China Chinese Acad Sci Suzhou Res Inst LICP Lanzhou Inst Chem Phys LICP State Key Lab Oxo Synth & Select Oxidat Lanzhou 730000 Peoples R China

The Chinese standard method of GB/T 4000-2017 was unable to accurately measure the coke thermal properties in the large blast furnace. Therefore, the coke compressive strength (CCS) test at a high temperature was designed to examine the coke thermal properties. Then, the large-scale coke model (sp2C17421sp3C6579) was established. After, the ReaxFF molecular dynamics simulations were implemented to mimic the coke solution loss (CSL) and the CCS at the high temperature. It was found that the adsorption energy and the diffusion energy of micropores were greater than those of mesopores and macropores, indicating that the CSL reaction mainly happened in the coke micropore. It was discovered that the CSL reaction mechanism was the sp3 C oxidization mechanism with the transient state of ketene structure. And, it was detected that the CCS process was divided into the plastic deformation, the instantaneous fracture and the elastic deformation and yield, which was caused by the local reconstruction, the overall folding and the center stretching of carbon layer, respectively. By comparing simulated results with experiments, it was proved that obtained mechanisms were valid. The proposed experimental and simulated methods provided a novel method to measure and understand the coke thermal properties. (c) 2024 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Coke model ReaxFF MD Coke solution loss Coke fracture

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Edge enhancement of phase objects through complex media by using transmission-matrixbased spiral phase contrast imaging

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Frontiers of physics 2022年第5期17卷 191-196页

作者： Qian Zhao Shijie Tu qiannan Lei Qingyang yue Chengshan Guo Yangjian Cai Shandong Provincial Engineering and Technical Center of Light Manipulations&Shandong Provincial Key Laboratory of Optics and Photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan 250358China School of Physical Science and Technology Soochow UniversitySuzhou 215006China

The wavefront shaping based technique has been introduced to detect the edges of amplitude objects through complex media,but the extraction of the boundary information of invisible phase objects through complex media has not been demonstrated ***,we present a phase contrast imaging technique to overcome the scattering,aiming to achieve the edge detection of the phase object through the complex *** operator based on the experimentally measured transmission matrix is obtained by numerically adding a spiral phase in the Fourier *** the inverse of the filtered transmission matrix,we can directly reconstruct the edge enhanced images for both amplitude object and phase object beyond ***,both digital and real objects are imaged,and the results verify that isotropic edge detection can be achieved with our *** work could benefit the detection of invisible phase objects through complex media.

关键词： complex media edge detection spiral phase contrast imaging

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Identification of the flavor profiles of Chinese pancakes from various areas using smart instruments combined with E-noses and E-tongues

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International Journal of Agricultural and Biological Engineering 2023年第1期16卷 283-290页

作者： Wei Liu yue Fan qiannan Liu Fen Xu Liang Zhang Honghai Hu Institute of Food Science and Technology Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products ProcessingMinistry of Agriculture and Rural AffairsBeijing 100193China

In order to reveal the flavor characteristics of Chinese pancakes,the aroma and taste compounds of seven traditional Chinese pancakes were *** results showed that electronic nose(E-nose)analysis with PCA could successfully distinguish the aroma profiles of seven Chinese pancakes;the principal components PC1 and PC2 represented 75.74%and 23.2%of the total variance(98.94%)***,the discrimination index of taste profiles of seven Chinese pancakes based on electronic tongue(E-tongue)analysis with LDA was 99.32%;the discriminant factors DF1 and DF2 represented 94.99%and 4.33%of the total variance ***,GC-MS results demonstrated that thirty-threeﬂavor compounds were identiﬁed in seven Chinese pancakes,including aldehydes,alcohols,alkanes,acids,and *** the flavor components,aldehydes with ROAVs higher than 1 contributed most significantly to the overall aroma,such as(E,E)-2,4-nonadienal present the largest contribution in Qingzhou pancake,Jinan and Yishui pancake;hexanal present the largest contribution in Shenxian and Gaomi pancake;nonanal and benzeneacetaldehyde present the largest contribution in Linqu and Tai’an pancake,*** umami and sweet taste amino acids were the most abundant in all the Chinese pancake samples,and Qingzhou pancake had relatively high amino acid *** content of glucose was higher than maltose in Gaomi,Shenxian,and Tai’an pancakes,whereas the content of maltose was higher than glucose in Linqu,Qingzhou,Jinan,and Yishui *** results indicated that the aroma and taste proﬁles of Chinese pancakes differed significantly in terms of their flavor compound *** presented results could be beneficial for providing a comprehensive method for flavor profile identification of traditional whole-grain-based staples such as Chinese pancakes.

关键词： Chinese pancake flavor profile E-nose E-tongue smart instrument identification

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Single cell transcriptomic analysis identifies novel vascular smooth muscle subsets under high hydrostatic pressure

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Science China(Life Sciences) 2021年第10期64卷 1677-1690页

作者： Zhenzhen Chen Haizeng Zhang Yingnan Bai Changting Cui Shuangyue Li Wenjie Wang yue Deng qiannan Gao Lu Wang Wei Qi Lijun Zhang Yan Yang Bin Geng Jun Cai Hypertension Center Department of Cardiac SurgeryFuwai HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeState Key Laboratory of Cardiovascular DiseaseNational Center for Cardiovascular DiseasesBeijing 100191China Novogene Bioinformatics Technology Co. Ltd.Beijing 100015China

Although some co-risk factors and hemodynamic alterations are involved in hypertension progression,their direct biomechanical effects are ***,we constructed a high-hydrostatic-pressure cell-culture system to imitate constant hypertension and identified novel molecular classifications of human aortic smooth muscle cells(HASMCs)by single-cell transcriptome *** 100-mmHg(analogous to healthy human blood pressure)or 200-mmHg(analogous to hypertension)hydrostatic pressure for 48 h,HASMCs showed six distinct vascular SMC(VSMC)clusters according to differential gene expression and gene ontology enrichment ***,two novel HASMC subsets were identified,named the inflammatory subset,with CXCL2,CXCL3 and CCL2 as markers,and the endothelial-function inhibitory subset,with AKR1C2,AKR1C3,SERPINF1 as *** inflammatory subset promoted CXCL2&3 and CCL2 chemokine expression and secretion,triggering monocyte migration;the endothelial-function inhibitory subset secreted SERPINF1 and accelerated prostaglandin F2αgeneration to inhibit *** expression of the two VSMC subsets was greatly increased in arterial media from patients with hypertension and experimental animal models of ***,we identified high hydrostatic pressure directly driving VSMCs into two new subsets,promoting or exacerbating endothelial dysfunction,thereby contributing to the pathogenesis of cardiovascular diseases.

关键词： single cell RNA-seq hypertension VSMCs hydrostatic pressure

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Severity of non-alcoholic fatty liver disease is a risk factor for developing hypertension from prehypertension

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Chinese Medical Journal 2023年第13期136卷 1591-1597页

作者： Qirui Song Qianhui Ling Luyun Fan yue Deng qiannan Gao Ruixue Yang Shuohua Chen Shouling Wu Jun Cai Hypertension Center Fuwai HospitalState Key Laboratory of Cardiovascular Disease of ChinaNational Center for Cardiovascular Diseases of ChinaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China State Key Laboratory of Cardiovascular Disease of China Fuwai HospitalNational Center for Cardiovascular Diseases of ChinaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China Department of Cardiology Kailuan General HospitalTangshanHebei 063000China

Background:There is little published evidence about the role of non-alcoholic fatty liver disease(NAFLD)in the progression from prehypertension to *** study was conducted to investigate the association of NAFLD and its severity with the risk of hypertension developing from ***:The study cohort comprised 25,433 participants from the Kailuan study with prehypertension at baseline;those with excessive alcohol consumption and other liver diseases were *** was diagnosed by ultrasonography and stratified as mild,moderate,or *** and multivariable Cox proportional hazard regression was used to calculate the hazard ratios(HRs)and 95%confidence intervals(CIs)of incident hypertension according to the presence and 3 categories of severity of ***:During a median of 12.6 years of follow-up,10,638 participants progressed to hypertension from *** adjusting for multiple risk factors,patients with prehypertension and NAFLD had a 15%higher risk of incident hypertension than those without NAFLD(HR=1.15,95%CI 1.10-1.21).Moreover,the severity of NAFLD was associated with the incidence of hypertension,which was higher in patients with more severe NAFLD(HR=1.15[95%CI 1.10-1.21]in the mild NAFLD group;HR=1.15[95%CI 1.07-1.24]in the moderate NAFLD group;and HR=1.20[95%CI 1.03-1.41]in the severe NAFLD group).Subgroup analysis indicated that age and baseline systolic blood pressure may modify this ***:NAFLD is an independent risk factor for hypertension in patients with *** risk of incident hypertension increases with the severity of NAFLD.

关键词： Hypertension Non-alcoholic fatty liver disease Prehypertension

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萤火虫算法优化的高光谱遥感影像极限学习机分类方法

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地球信息科学学报 2015年第8期17卷 986-994页

作者：蔡悦苏红军李茜楠河海大学地球科学与工程学院南京210098

机器学习方法在高光谱遥感影像分类中广泛应用,本文使用新型的极限学习机(Extreme Learning Machine,ELM)进行高光谱遥感影像分类,针对ELM中正则化参数C和核参数σ,提出以萤火虫算法(Firefly Algorithm,FA)进行优化。首先,采用萤火虫算... 详细信息

机器学习方法在高光谱遥感影像分类中广泛应用,本文使用新型的极限学习机(Extreme Learning Machine,ELM)进行高光谱遥感影像分类,针对ELM中正则化参数C和核参数σ,提出以萤火虫算法(Firefly Algorithm,FA)进行优化。首先,采用萤火虫算法进行高光谱遥感影像的波段选择,以便降低维数;然后,利用萤火虫算法以分类精度最大化为准则对ELM的参数组合(C,σ)进行寻优;最后,利用参数优化后的ELM分类器,对3个不同传感器的高光谱遥感影像进行分类。实验中将新型的萤火虫算法与遗传算法(Genetic Algorithm,GA)和粒子群算法(Particle Swarm Optimization,PSO)进行了对比,并将ELM的性能与支持向量机(Support Vector Machine,SVM)方法作对比。结果表明,FA优化方法优于传统的GA和PSO优化方法,ELM方法的效果在训练时间和分类准确率2个方面都优于SVM方法。实验说明,本文提出的方法具有较好的适用性和较优的分类效果。

关键词：极限学习机高光谱遥感分类参数优化

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8-氯-6-(三氟甲基)咪唑并[1,2-a]吡啶噁二唑硫醚类衍生物的设计、合成及其杀线虫和杀菌活性

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有机化学 2024年第5期44卷 1620-1629页

作者：郭倩男黄森赵薇赵伟严越王济海徐志红长江大学农学院湖北荆州434025 北门中学湖北荆州434000

为了发现具有高杀线虫和杀菌活性的新化合物,设计合成了22个8-氯-6-(三氟甲基)咪唑并[1,2-a]吡啶噁二唑硫醚类衍生物,并通过1HNMR,13CNMR和高分辨质谱(HRMS)对所有目标化合物结构进行了确证.杀线虫活性测定结果显示,在浓度为100 mg/L时... 详细信息

为了发现具有高杀线虫和杀菌活性的新化合物,设计合成了22个8-氯-6-(三氟甲基)咪唑并[1,2-a]吡啶噁二唑硫醚类衍生物,并通过1HNMR,13CNMR和高分辨质谱(HRMS)对所有目标化合物结构进行了确证.杀线虫活性测定结果显示,在浓度为100 mg/L时,所有目标化合物对秀丽隐杆线虫(二龄幼虫)均有一定的毒杀活性.其中2-[8-氯-6-(三氟甲基)咪唑并[1,2-a]吡啶-2-基]-5-((2-氟苄基)硫基)-1,3,4-噁二唑(6j)、2-[8-氯-6-(三氟甲基)咪唑并[1,2-a]吡啶-2-基]-5-(((2-氯苄基)硫基)-1,3,4-噁二唑(6m)、2-[8-氯-6-(三氟甲基)咪唑并[1,2-a]吡啶-2-基]-5-((2-氰基苄基)硫基)-1,3,4-噁二唑(6q)、2-[8-氯-6-(三氟甲基)咪唑并[1,2-a]吡啶-2-基]-5-((3-甲氧基苄基)硫基)-1,3,4-噁二唑(6s)和2-[8-氯-6-(三氟甲基)咪唑并[1,2-a]吡啶-2-基]-5-((4-甲氧基苄基)硫基)-1,3,4-噁二唑(6t)对秀丽隐杆线虫的LC50分别为48.10、34.94、52.87、48.32和37.62 mg/L,均优于对照药剂噻唑磷(79.28 mg/L).杀菌活性测定结果显示,2-[8-氯-6-(三氟甲基)咪唑并[1,2-a]吡啶-2-基]-5-((2-溴乙基)硫基)-1,3,4-噁二唑(6d)对水稻纹枯病菌Rhizoctoniasolani表现出良好的抑制活性,其EC50值为7.22mg/L,优于对照药剂氟吡菌酰胺(110.02 mg/L).在100和200 mg/L浓度下,化合物6d对水稻纹枯病菌的保护防效分别为85.5%和92.1%,治疗防效分别为59.2%和79.0%.此研究合成的目标化合物具有一定的杀线虫和杀菌活性,可为咪唑并[1,2-a]吡啶类衍生物的设计和合成提供新思路,对探究咪唑并[1,2-a]吡啶类衍生物的生物活性多样性具有参考意义.

关键词：咪唑并[1,2-a]吡啶噁二唑硫醚秀丽隐杆线虫杀线虫活性杀菌活性

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“饭圈”群体极化现象探究与分析

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西部学刊 2023年第15期 172-176页

作者：于倩男吴越西华大学计算机与软件工程学院成都610039

“饭圈”群体极化所引起的网络骂战等负面效应严重影响着网络社会和谐,“饭圈”乱象亟待整治。通过对“饭圈”群体极化现象进行剖析,总结了“饭圈”群体极化的形成原因和影响因素。以新浪微博“饭圈”群体极化案例为切入点,发现“饭圈... 详细信息

“饭圈”群体极化所引起的网络骂战等负面效应严重影响着网络社会和谐,“饭圈”乱象亟待整治。通过对“饭圈”群体极化现象进行剖析,总结了“饭圈”群体极化的形成原因和影响因素。以新浪微博“饭圈”群体极化案例为切入点,发现“饭圈”群体极化的潜在规律:(一)在群体极化高潮期之后,中立观点能够促进极化的衰退;(二)“饭圈”群体之间已存在的负关系是群体极化的促进力;(三)粉群意见领袖是群体极化的引导者,是影响群体极化的关键人物。

关键词：群体极化 “饭圈” 新浪微博

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紫外线消毒技术的研究现状及发展趋势

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光学技术 2020年第6期46卷 664-670页

作者：文尚胜左文财周悦叶倩楠覃东欢陈贤东华南理工大学材料科学与工程学院高分子光电材料及器件研究所广东广州510640

在COVID-19流行期,为考察新型紫外线消毒技术研究及其应用状况,对紫外发光二极管和222nm远紫外消毒技术两类新型紫外消毒技术进行了探讨。详细介绍了UV-LED的单波长照射,脉冲紫外照射和多波长协同照射三种消毒方案的研究进展、应用场所... 详细信息

在COVID-19流行期,为考察新型紫外线消毒技术研究及其应用状况,对紫外发光二极管和222nm远紫外消毒技术两类新型紫外消毒技术进行了探讨。详细介绍了UV-LED的单波长照射,脉冲紫外照射和多波长协同照射三种消毒方案的研究进展、应用场所并对其潜力进行了探讨;重点介绍了222nm远紫外消毒技术,对其应用和未来发展做出了展望;讨论了UV-LED现阶段遇到的问题并对紫外消毒市场发展做出了展望,预计未来紫外消毒市场中将形成汞灯为主,LED为辅,两者相互补充的格局。

关键词：生物光学紫外线消毒低压汞灯紫外发光二极管远紫外

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中国沿海地区大气污染特征及其聚类分析

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环境科学研究 2018年第12期31卷 2063-2072页

作者：龙凌波佘倩楠孟紫琪刘敏岳祝闫媛媛华东师范大学生态与环境科学学院上海200241 华东师范大学上海市城市化生态过程与生态恢复重点实验室上海200241 崇明生态研究院上海200062

为识别我国沿海地区的大气污染分布特征,基于2015—2016年我国沿海12个省(自治区、直辖市)的115个地级以上城市ρ(PM_(2.5))、ρ(PM_(10))、ρ(NO_2)、ρ(O_3)、ρ(CO)和ρ(SO_2)监测数据,在分析其时空分布特征的基础上,结合主成分分析... 详细信息

为识别我国沿海地区的大气污染分布特征,基于2015—2016年我国沿海12个省(自治区、直辖市)的115个地级以上城市ρ(PM_(2.5))、ρ(PM_(10))、ρ(NO_2)、ρ(O_3)、ρ(CO)和ρ(SO_2)监测数据,在分析其时空分布特征的基础上,结合主成分分析和AIC(改进赤池信息准则)开展我国沿海地区大气污染聚类分析研究.结果表明:我国沿海地区颗粒物污染严重,其中70%和54%的城市未达到GB 3095—2012《环境空气质量标准》中ρ(PM_(2.5))和ρ(PM_(10))二级标准,ρ(PM_(2.5))在空间上以浙江省金华市为界呈"北高南低"、金华市以北地区"西高东低"的分布特征;环渤海带及长三角地区ρ(O_3)处于相对较高水平,山东省中部ρ(SO_2)突出,最高值达71.3μg/m^3.根据6种大气污染物监测值,可将115个地级以上城市聚为3类:类Ⅰ包括河北省南部和山东省西部在内的21个城市,空间分布连续且相对集中,受本地源和扩散条件的影响,各项大气污染物质量浓度均处于较高水平;类Ⅱ包括辽宁省、山东省东部和长三角等地区的42个城市,各项大气污染物质量浓度较类Ⅰ有所降低,ρ(PM_(2.5))降低(比类Ⅰ低34.2%)明显,更多表现为受工业和散煤燃烧影响的SO_2污染,和受海运船舶和陆路交通源影响的NO_2污染;类Ⅲ包括福建省、广东省和广西壮族自治区沿海一带的52个城市,大气污染物质量浓度相对较低,空气质量较优,受季风和外来源影响的秋季O_3污染特征明显.3类城市ρ(O_3)平均值相近但季节性变化有所差异,类Ⅰ和类Ⅱρ(O_3)峰值均出现在6月,类Ⅰρ(O_3)季节性差异更为显著,类Ⅲ峰值出现在10月,全年变幅相对较小.研究显示,我国沿海地区山东省西部、江苏省北部与京津冀地区南部呈较为相似的污染特征,广西壮族自治区柳州市与周边城市呈不同聚类特征,ρ(PM)和ρ(SO_2)相对较高,为大气污染热点.

关键词：大气污染空间分异聚类分析沿海地区

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