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Journal of Central South University 2024年第6期31卷 1870-1887页

作者： CAO Yue sun yong-sheng HAN Yue-xin GAO Peng LI Yan-jun School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China National-local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources Shenyang 110819China

The magnetization reduction of hematite using biomass waste can effectively utilize waste and reduce CO_(2) emission to achieve the goals of carbon peaking and carbon *** effects of temperatures on suspension magnetization roasting of hematite using biomass waste for evolved gases have been investigated using TG-FTIR,Py-GC/MS and gas composition *** mixture reduction process is divided into four *** the temperature range of 200-450℃ for mixture,the release of CO_(2),acids,and ketones is dominated in gases *** yield and concentration of small molecules reducing gases increase when the temperature increases from 450 to 900℃.At 700℃,the volume concentrations of CO,H_(2) and CH_(4) peak at 8.91%,8.90% and 4.91%,*** the suspension magnetization roasting process,an optimal iron concentrate with an iron grade of 70.86%,a recovery of 98.66% and a magnetic conversion of 45.70% is obtained at 700℃.Therefore,the magnetization reduction could react greatly in the temperature range of 600 to 700℃ owing to the suitable reducing *** study shows a detail gaseous evolution of roasting temperature and provides a new insight for studying the reduction process of hematite using biomass waste.

关键词： suspension magnetization roasting biomass pyrolysis gases evolution reduction behavior

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流化床反应室内铁矿石的临界流化特性

东北大学学报（自然科学版） 2024年第4期45卷 592-599页

作者：李志明韩跃新孙永升唐志东东北大学资源与土木工程学院辽宁沈阳110819

U型反应室是悬浮焙烧装备的核心部件,明确其内物料的临界流化特性具有理论与实践意义.为此,自行搭建了冷态试验系统,并以赤铁矿粉、氧化铝粉为原料,研究了松动风量、物料性质对物料临界流化特性的影响规律,并对原有经验公式进行了修正.... 详细信息

U型反应室是悬浮焙烧装备的核心部件,明确其内物料的临界流化特性具有理论与实践意义.为此,自行搭建了冷态试验系统,并以赤铁矿粉、氧化铝粉为原料,研究了松动风量、物料性质对物料临界流化特性的影响规律,并对原有经验公式进行了修正.结果表明:临界流化气速随物料粒度、密度的增加而增加;在松动室床层为固定床的条件下,临界流化气速随松动风量的增大而减小;修正后的过程方程与试验数据吻合较好,可用于反应室内物料流化行为的预测.研究结果利于悬浮磁化焙烧技术实体化,对该技术工业应用具有一定的指导意义.

关键词：悬浮磁化焙烧炉流化床反应室冷态试验降速法临界流化特性

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新生儿坏死性小肠结肠炎病原菌及其危险因素

中华医院感染学杂志 2024年第13期34卷 2050-2053页

作者：金霞孙勇生陈蓉蓉何思思张小华南通大学附属南通妇幼保健院儿科江苏南通226001

目的探讨新生儿坏死性小肠结肠炎病原菌及其危险因素。方法选取2018年1月-2022年12月南通大学附属南通妇幼保健院收治确诊为新生儿坏死性小肠结肠炎的82例患儿为研究组,随机选取同期非新生儿坏死性小肠结肠炎的82例新生儿为对照组,统计... 详细信息

目的探讨新生儿坏死性小肠结肠炎病原菌及其危险因素。方法选取2018年1月-2022年12月南通大学附属南通妇幼保健院收治确诊为新生儿坏死性小肠结肠炎的82例患儿为研究组,随机选取同期非新生儿坏死性小肠结肠炎的82例新生儿为对照组,统计并分析新生儿坏死性小肠结肠炎病原菌分布、耐药性及危险因素。结果82例新生儿坏死性小肠结肠炎共分离出44株病原菌,革兰阴性菌29株(65.91%),革兰阳性菌14株(31.82%),真菌1株(2.27%);其中肺炎克雷伯菌对阿莫西林、头孢呋辛耐药11株,对左氧氟沙星、环丙沙星耐药0株;大肠埃希菌对阿莫西林耐药11株,对氨苄西林/舒巴坦耐药10株,对亚胺培南、哌拉西林/他唑巴坦耐药0株。妊娠期糖尿病、非母乳喂养、早产、新生儿休克、胎膜早破、宫内窘迫、新生儿出生体质量低是新生儿坏死性小肠结肠炎的危险因素(P<0.05)。结论新生儿坏死性小肠结肠炎感染病原菌主要为革兰阴性菌,肺炎克雷伯菌对左氧氟沙星、环丙沙星敏感;大肠埃希菌对亚胺培南、哌拉西林/他唑巴坦敏感。妊娠期糖尿病、非母乳喂养、早产、新生儿休克、胎膜早破、宫内窘迫、新生儿出生体质量低是新生儿坏死性小肠结肠炎的危险因素。

关键词：新生儿坏死性小肠结肠炎病原菌耐药性临床特征危险因素

Electron Interaction with Lithium Atoms and Electron Impact Broadening of the Lithium Resonance Line

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Chinese Physics Letters 1999年第12期16卷 885-887页

作者： ZHAO Zeng-xiu YUAN Jian-min sun yong-sheng Department of Applied Physics National University of Defense TechnologyChangsha 410073 Institute of Applied Physics and Computational Mathematics Beijing 100088

Electron collision with lithium atoms is calculated by using R-matrix method. The scattering parameters are applied in the determination of the electron impact broadening and shift of the lithium resonance line 2s2S-2p2P. The width and shift are obtained based on the impact approximation. A largest discrepancy of 30 percent for the broadening width is found from a semiclassical calculation.

关键词： calculation. method. Electron

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不同产蛋数岩鸽卵巢转录组的SNP分析

湖北农业科学 2024年第4期63卷 185-190页

作者：毛楠楠孙勇胜陈辉周荣艳籍颖河北农业大学动物科技学院河北保定071001 河北省肉鸽产业技术研究院河北阜平073299

为探索岩鸽(Columba livia)产蛋数相关基因及其遗传标记,利用STAR对高产蛋数和低产蛋数岩鸽卵巢组织转录组数据高质量序列与参考基因组进行比对,去除重复序列后利用GATK进行单核苷酸多态性(SNP)筛选,利用VCFtools对SNP质控后进行主成分... 详细信息

为探索岩鸽(Columba livia)产蛋数相关基因及其遗传标记,利用STAR对高产蛋数和低产蛋数岩鸽卵巢组织转录组数据高质量序列与参考基因组进行比对,去除重复序列后利用GATK进行单核苷酸多态性(SNP)筛选,利用VCFtools对SNP质控后进行主成分分析、进化树构建和Fst计算,利用KEGG富集分析SNP所在基因。结果显示,高产蛋组共有SNP数为298957个,低产蛋组共有SNP数为296137个,高产蛋组、低产蛋组共有SNP数为254118个,KEGG分析结果发现,SNP所在基因显著富集在孕酮调节的卵母细胞成熟、卵母细胞减数分裂和代谢等信号通路;高产蛋组和低产蛋组的102个特异SNP分布在14个注释基因上(LOC110357454、KDM5A、PIGS、BNC2、GBF1、SLAIN2、FGD4、DIAPH2、KIF3B、NFIB、EPG5、OSTF1、EMB、ST3GAL3),且富集的信号通路可能与其产蛋能力密切相关。

关键词：岩鸽(Columba livia) 卵巢转录组 SNP 产蛋数

Microwave-promoted solvent-free synthesis of N-(diphenylmethylene)glycine alkyl esters

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Chinese Chemical Letters 2009年第12期20卷 1405-1407页

作者： Quan Jun Wang Wei He Qiao Feng Wang Xin Shi Xiao Li sun sheng yong Zhang Department of Chemistry Fourth Military Medical University Xi'an 710032 China

The efficient synthesis of N-（diphenylmethylene） glycine alkyl esters was achieved for the first microwave irradiation under solvent-free condition, using PEG or quaternary ammonium salts as phase transfer catalysts （PTCs）. Under the optimum conditions, N-（diphenylmethylene） glycine alkyl esters were obtained in excellent yields in most cases.

关键词： Microwave Solvent-free N-(Diphenylmethylene)glycine alkyl esters

A Weakly-Supervised Crowd Density Estimation Method Based on Two-Stage Linear Feature Calibration

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 965-981页

作者： yong-Chao Li Rui-sheng Jia Ying-Xiang Hu Hong-Mei sun the College of Computer Science and Engineering Shandong University of Science and TechnologyQingdao 266590 the Faculty of Information Science and Engineering Ocean University of ChinaQingdao 266000China the College of Computer Science and Engineering Shandong University of Science and TechnologyQingdao 266590China the College of Computer Science and Engineering Nanjing University of Science and TechnologyNanjing 210000China

In a crowd density estimation dataset,the annotation of crowd locations is an extremely laborious task,and they are not taken into the evaluation *** this paper,we aim to reduce the annotation cost of crowd datasets,and propose a crowd density estimation method based on weakly-supervised learning,in the absence of crowd position supervision information,which directly reduces the number of crowds by using the number of pedestrians in the image as the supervised *** this purpose,we design a new training method,which exploits the correlation between global and local image features by incremental learning to train the ***,we design a parent-child network(PC-Net)focusing on the global and local image respectively,and propose a linear feature calibration structure to train the PC-Net simultaneously,and the child network learns feature transfer factors and feature bias weights,and uses the transfer factors and bias weights to linearly feature calibrate the features extracted from the Parent network,to improve the convergence of the network by using local features hidden in the crowd *** addition,we use the pyramid vision transformer as the backbone of the PC-Net to extract crowd features at different levels,and design a global-local feature loss function(L2).We combine it with a crowd counting loss(LC)to enhance the sensitivity of the network to crowd features during the training process,which effectively improves the accuracy of crowd density *** experimental results show that the PC-Net significantly reduces the gap between fullysupervised and weakly-supervised crowd density estimation,and outperforms the comparison methods on five datasets of Shanghai Tech Part A,ShanghaiTech Part B,UCF_CC_50,UCF_QNRF and JHU-CROWD++.

关键词： Crowd density estimation linear feature calibration vision transformer weakly-supervision learning

A Calculation of Electron Impact for the 3d5/2→2p3/2 Line Emission of Fe^(23+)

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Chinese Physics Letters 2000年第6期17卷 403-404页

作者： CHEN Chong-Yang QI Jing-Bo WANG Yan-Sen XU Xue-Ji sun yong-sheng Institute of Modern Physics Fudan UniversityShanghai 200433 Institute of Electric Light Sources Fudan UniversityShanghai 200433 Institute of Applied Physics and Computational Mathematics Beijing 100088

By using the semi-relativistic distorted-wave Born exchange method,electron impact cross sections for the Fe^(23+)line emission 3_(d5/2)→2_(p3/2)are *** calculation involves line formation by direct electron-impact excitation,radiative cascade,resonant excitation,and dielectronic recombination satellites with captured electron in the n≥5 *** results show a good agreement with the recent measurements.

关键词： excitation Electron resonant

OPTIMAL INTERPOLATION ON A CONVO-LUTION CLASS OF FUNCTIONS

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Chinese Science Bulletin 1989年第14期34卷 1148-1152页

作者：孙永生 Beijing Normal university

Ⅰ. PROBLEM AND MAIN RESULTS Let G（t） be a continuous function defined on R. It is said to be a PF density,if integral from n=-∞ to +∞ G（t）dt=1, and is totally positive on R, i.e. （?）n≥1, t1n, τ1n, it holds ... 详细信息

关键词： optimal interpolation convolution class PF density

In silico optimization of actuation performance in dielectric elastomercomposites via integrated finite element modeling and deep learning

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Theoretical & Applied Mechanics Letters 2024年第1期14卷 48-56页

作者： Jiaxuan Ma sheng sun Materials Genome Institute Shanghai UniversityShanghai 200444China Zhejiang Laboratory Hangzhou 311100China Shanghai Frontier Science Center of Mechanoinformatics Shanghai UniversityShanghai 200444China

Dielectric elastomers(DEs)require balanced electric actuation performance and mechanical integrity under applied *** high dielectric particles as fillers provides extensive design space to optimize concentration,morphology,and distribution for improved actuation performance and material *** study presents an integrated framework combining finite element modeling(FEM)and deep learning to optimize the microstructure of DE *** first calculates actuation performance and the effective modulus across varied filler combinations,with these data used to train a convolutional neural network(CNN).Integrating the CNN into a multi-objective genetic algorithm generates designs with enhanced actuation performance and material modulus compared to the conventional optimization approach based on FEM approach within the same *** framework harnesses artificial intelligence to navigate vast design possibilities,enabling optimized microstructures for high-performance DE composites.

关键词： Dielectric elastomer composites Multi-objective optimization Finite element modeling Convolutional neural network