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Science China Chemistry 2024年第9期67卷 3153-3161页

作者： Yuehua Man An Li Haowei Tang Jianlu Sun Yating Fei yichen du Xiaosi Zhou School of Chemistry and Materials Science Nanjing Normal UniversityNanjing 210023China

VS_(4) has a unique layered atomic chain structure and has the potential to become a high-performance cathode material of magnesium-ion batteries with a high capacity and long cycle ***,low conductivity and sluggish Mg^(2+)diffusivity during cycling limit its practical application in large-scale energy ***,a cooperative assembly-directed strategy is adopted to synthesize VS_(4) nanorods grown in situ on carbon nanotubes(CNTs/VS_(4)).VS_(4) nanorods are tightly anchored to CNTs through V-O-C interface covalent bonds,and CNTs can enhance the electronic conductivity of the *** addition,the ion insertion reaction using Mg^(2+)and Mg Cl^(+)as carriers reduces the polar barrier for divalent Mg^(2+)ion *** rationally designed architecture promotes ion diffusion and electron transfer,thus facilitating reaction *** cooperative assembly-oriented strategy can endow CNTs/VS_(4) with excellent magnesium storage properties,including a high reversible capacity of 223.2 m Ah g^(-1)at a current density of 50 m A g^(-1),a remarkable discharge capacity of 91.8 m Ah g^(-1)even at 2,000 m A g^(-1),and an impressive capacity retention of 85.2% after 1,000 cycles at 500 m A g^(-1).Moreover,this strategy can serve as a general synthetic method for the complexation of VS_(4) with other carbon nanostructures.

关键词： transition metal sulfides carbon nanostructure interfacial covalent bond magnesium-ion batteries cathode

Sn_(4)P_(3)nanoparticles confined in multilayer graphene sheets as a high-performance anode material for potassium-ion batteries

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Journal of Energy Chemistry 2022年第3期31卷 413-421,I0011页

作者： yichen du Zuyue Yi Bingbing Chen Jingyi Xu Zhuangzhuang Zhang Jianchun Bao Xiaosi Zhou Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023JiangsuChina

Phosphorus-based anodes are highly promising for potassium-ion batteries(PIBs)because of their large theoretical ***,the inferior potassium storage properties caused by the poor electronic conductivity,easy self-aggregation,and huge volumetric changes upon cycling process restrain their practical *** we impregnate Sn_(4)P_(3)nanoparticles within multilayer graphene sheets(Sn_(4)P_(3)/MGS)as the anode material for PIBs,greatly improving its potassium storage ***,the graphene sheets can efficiently suppress the aggregation of Sn_(4)P_(3)nanoparticles,enhance the electronic conductivity,and sustain the structural *** addition,plenty of Sn_(4)P_(3)nanoparticles impregnated in MGS offer a large accessible area for the electrolyte,which decreases the diffusion distance for K^(+)and electrons upon K^(+)insertion/extraction,resulting in an improved rate ***,the optimized Sn_(4)P_(3)/MGS containing 80 wt%Sn_(4)P_(3)(Sn_(4)P_(3)/MGS-80)exhibits a high reversible capacity of 378.2 and 260.2 m Ah g;at 0.1 and 1 A g^(-1),respectively,and still delivers a large capacity retention of 76.6%after the 1000th cycle at 0.5 A g^(-1).

关键词： Sn4P3 Multilayer graphene sheets Ball milling Potassium-ion batteries Anode

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济莱高铁对沿线可达性影响评价分析

交通科技与经济 2024年第4期26卷 75-80页

作者：杨小凤于小明杜以臣李红济南轨道交通集团运营有限公司济南250101 济南交通发展投资有限公司济南250101

以全国第一条市域高铁济莱高铁为对象,以市区为评价单元进行高铁开通前后时间可达性对比分析,通过地理信息系统(GIS)影像解译进行路网、地形信息提取,利用成本距离法计算区域可达性,力图为高铁济莱沿途区域可达性影响评价与分析提供参... 详细信息

以全国第一条市域高铁济莱高铁为对象,以市区为评价单元进行高铁开通前后时间可达性对比分析,通过地理信息系统(GIS)影像解译进行路网、地形信息提取,利用成本距离法计算区域可达性,力图为高铁济莱沿途区域可达性影响评价与分析提供参照。济莱高铁对沿线区域可达性提升显著,各等时圈有不同程度的提升和缩减,不同区域可达性提升差异明显,边缘区域可达性提升优于中心区域,主要呈现以区域为中心的不规则圆形延伸,距离区域中心越远的地区到区域中心的时间可达性提升程度就越大。结果表明济莱高铁开通存在明显的时空压缩效应,可推进沿线区域一体化发展,为推动区域社会经济发展提供重要支撑。

关键词：交通工程济莱高铁地理信息系统可达性成本距离

Coupling Co_(3)[Co(CN)_(6)]_(2) nanocubes with reduced graphene oxide for high-rate and long-cycle-life potassium storage

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Journal of Energy Chemistry 2021年第7期30卷 593-601页

作者： Yifan Xu yichen du Zuyue Yi Zhuangzhuang Zhang Chenling Lai Jiaying Liao Xiaosi Zhou Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023JiangsuChina

As one of prussian blue analogues,Co_(3)[Co(CN)_(6)]_(2) has been explored as a promising anode material for potassium-ion batteries(PIBs) owing to its high potassium storage ***,Co_(3)[Co(CN)_(6)]_(2) possesses low electronic conductivity and its structure collapses easily during potassiation and depotassiation,resulting in poor rate performance and cyclic *** solve these problems,we develop a facile multi-step method to successfully combine uniformCo_(3)[Co(CN)_(6)]_(2) nanocubes with rGO by C-O-Co *** expected,these chemcial bonds shorten the distance betweenCo_(3)[Co(CN)_(6)]_(2) and rGO to the angstrom meter level,which significantly improve the electronic conductivity ofCo_(3)[Co(CN)_(6)]_(2).Besides,the complete encapsulation ofCo_(3)[Co(CN)_(6)]_(2) nanocubes by rGO endows the structure ofCo_(3)[Co(CN)_(6)]_(2) with high stability,thus withstanding repeated insertion/extraction of potassium-ions without visible morphological and structural *** from the abovementioned structural advantages,the CO3 [Co(CN)6]2/rGO nanocomposite exhibits a high reversible capacity of 400.8 mAh g^(-1) at a current density of 0.1 A g^(-1),an exceptional rate capability of 115.5 mAh g^(-1) at 5 A g^(-1), and an ultralong cycle life of 231.9 mAh g^(-1) at 0.1 A g^(-1) after 1000 ***,the effects of different amounts of rGO and different sizes ofCo_(3)[Co(CN)_(6)]_(2) nanocubes on the potassium storage performance are also *** work offers an ideal route to significantly enhance the electrochemical properties of prussian blue analogues.

关键词： Co_(3)[Co(CN)_(6)]_(2) Reduced graphene oxide Anode Potassium-ion batteries Energy storage

Double-Coated Fe_(2)N@TiO_(2)@C Yolk-Shell Submicrocubes as an Advanced Anode for Potassium-Ion Batteries

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Chinese Journal of Chemistry 2021年第7期39卷 1878-1884页

作者： yichen du Wangsuo Weng Zhuangzhuang Zhang Yanan He Jingyi Xu Tian Yang Jianchun Bao Xiaosi Zhou Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjingJiangsu210023 China

Main observation and conclusion Rationally designing inexpensive iron nitrides that have large conductivity,high theoretical capacity,and rapid ionic diffusion kinetics is of great importance for realizing their pract... 详细信息

关键词： Iron Nitrides Titanium oxide Carbon Potassium-ion battery

Spatiotemporal variation of cyanobacterial harmful algal blooms in China based on literature and media information

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International Journal of Digital Earth 2023年第1期16卷 3905-3922页

作者： yichen du Chen Wang Mengqiu Wang Huan Zhao Kai Yan Yunchang Mu Wenzhi Zhang Fangfang Zhang Shenglei Wanga Junsheng Li Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijingPeople’s Republic of China College of Resources and Environment University of Chinese Academy of SciencesBeijingPeople’s Republic of China Research Center of Big Data for Sustainable Development Goals BeijingPeople’s Republic of China Satellite Application Center for Ecology and Environment Ministry of Ecology and Environment of the People’s Republic of ChinaBeijingPeople’s Republic of China School of Remote Sensing and Information Engineering Wuhan UniversityWuhanPeople’s Republic of China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijingPeople’s Republic of China

Cyanobacterial harmful algal blooms(CyanoHABs)in inland waters are now among the most pressing environmental issues worldwide,especially in *** remote sensing has limitations in monitoring CyanoHABs in small water bodies due to spatial and temporal resolution *** literature and news media have the potential to supplement satellite remote sensing in monitoring CyanoHABs,they have currently not received sufficient *** this study,we combined information on the distributions of CyanoHABs from literature and media for the first time to comprehensively assess the spatiotemporal variation in CyanoHABs in *** collected,cleaned,validated,and organized data from literature and media on CyanoHABs in China,resulting in the establishment of a comprehensive database on CyanoHABs in China's inland waters(ChinaCyanoDB)covering 198 water bodies,525 records for *** majority of water bodies with CyanoHABs(CyanoWaters)are located in the eastern China,mainly concentrated in the middle and lower Yangtze region,with a clear upward trend in their number over the last four *** ChinaCyanoDB and analytical results can provide valuable data support for monitoring and managing CyanoHABs in China while the database construction method may also be applied to other countries and regions.

关键词： CyanoHABs China literature media information spatiotemporal variation

UAV search-and-rescue planning using an adaptive memetic algorithm

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Frontiers of Information Technology & Electronic Engineering 2021年第11期22卷 1477-1491页

作者： Libin HONG Yue WANG yichen du Xin CHEN Yujun ZHENG School of Information Science and Technology Hangzhou Normal UniversityHangzhou311121China College of Computer Science and Technology Zhejiang University of TechnologyHangzhou310023China

The use of unmanned aerial vehicles(UAVs) is becoming more commonplace in search-and-rescue tasks,but UAV search planning can be very complex due to limited response time, large search area, and multiple candidate search modes. In this paper, we present a UAV search planning problem where the search area is divided into a set of subareas and each subarea has a prior probability that the target is present in it. The problem aims to determine the search sequence of the subareas and the search mode for each subarea to maximize the probability of finding the target. We propose an adaptive memetic algorithm that combines a genetic algorithm with a set of local search procedures and dynamically determines which procedure to apply based on the past performance of the procedures measured in fitness improvement and diversity improvement during problem-solving. Computational experiments show that the proposed algorithm exhibits competitive performance compared to a set of state-of-the-art global search heuristics, non-adaptive memetic algorithms, and adaptive memetic algorithms on a wide set of problem instances.

关键词： Memetic algorithm Self-adaptive Unmanned aerial vehicle(UAV) Search-and-rescue

基于细胞焦亡基因前列腺癌预后模型的构建及肿瘤微环境分析

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癌症进展 2024年第2期22卷 176-182页

作者：邵波万水田申马园园陈丹霞杜沂宸昭通市中医医院泌尿外科云南昭通657000 芜湖市中医医院泌尿外科安徽芜湖241000 芜湖市中医医院皮肤科安徽芜湖241000 芜湖市中医医院肛肠科安徽芜湖241000

目的基于细胞焦亡基因构建前列腺癌(PCa)预后模型并分析其肿瘤微环境。方法从癌症基因组图谱(TCGA)数据库中获取502例PCa患者和51例健康者的基因转录组数据、基因突变数据,提取差异表达的细胞焦亡基因。从基因表达综合(GEO)数据库中获... 详细信息

目的基于细胞焦亡基因构建前列腺癌(PCa)预后模型并分析其肿瘤微环境。方法从癌症基因组图谱(TCGA)数据库中获取502例PCa患者和51例健康者的基因转录组数据、基因突变数据,提取差异表达的细胞焦亡基因。从基因表达综合(GEO)数据库中获取96例PCa患者的临床特征及细胞焦亡基因表达数据,筛选出与预后相关的细胞焦亡基因。从ImmPort数据库中下载免疫细胞数据。采用聚类分析确定PCa患者的最佳亚型分组并采用主成分分析(PCA)进行验证。对不同亚型PCa患者的差异交集基因进行基因本位(GO)功能注释和京都基因与基因组百科全书(KEGG)富集分析。将单因素Cox分析获得的显著差异表达基因纳入Lasso回归模型,获取与预后相关的基因。将PCa患者随机均等分为训练集和测试集,分别进行Lasso回归分析,根据训练集风险评分的中位值将训练集、测试集分为高风险组和低风险组。采用多因素Cox回归模型分析PCa患者预后的独立影响因素并构建预后模型。应用R语言包分析细胞焦亡基因与免疫细胞含量、干细胞含量与风险评分的相关性及高低风险组患者的肿瘤突变负荷差异。结果差异分析获得37个显著差异表达的细胞焦亡基因。根据细胞焦亡基因的表达量及临床数据分析,获得10个与PCa预后相关的细胞焦亡基因。根据累积分布函数图的K值将PCa分为A、B、C三个亚型,且经PCA分析验证分型结果可靠。GO及KEGG富集分析结果显示,109个差异交集基因主要通过细胞外基质组织(EMO)、细胞外结构组织(ESO)、肽基酪氨酸磷酸化(PTP)、肽基酪氨酸修饰(PTM)等通路激活蛋白酪氨酸激酶(PTK)、跨膜受体蛋白激酶(TRPK)等分子功能。Lasso回归模型筛选出B细胞淋巴瘤/白血病3(BCL3)、骨形成蛋白2(BMP2)、C-C趋化因子受体5(CCR5)、几丁质酶3样蛋白2(CHI3L2)、肝癌缺失蛋白1(DLC1)、主要组织相容性复合体Ⅱ类DQ alpha 2(HLA-DQA2)、分泌球蛋白家族3A成员1(SCGB3A1)、serpin家族E成员1(SERPINE1)、溶质载体家族14成员1(SLC14A1)9个与预后相关的基因。差异分析显示,训练集与测试集预后情况大致相同,且随着风险评分的升高,患者死亡人数增加。多因素Cox分析结果显示,年龄、肿瘤分期(T分期、N分期)、风险程度均是PCa患者预后的独立影响因素。预后模型预测PCa患者第6、9、12年的生存情况与患者的实际生存情况比较相符。相关性分析显示,免疫细胞与细胞焦亡基因存在相关性(P﹤0.01)。对高风险组(n=376)与低风险组(n=126)进行差异分析,结果显示,高风险组患者的基质细胞评分和肿瘤突变负荷均明显高于低风险组,差异均有统计学意义(P﹤0.01)。干细胞含量与风险评分呈正相关(P﹤0.01)。结论本文成功构建了基于细胞焦亡基因的PCa预后模型,并进行了肿瘤微环境分析,发现了BCL3、BMP2、CCR5、CHI3L2、DLC1、HLA-DQA2、SCGB3A1、SERPINE1、SLC14A19个细胞焦亡基因,可预测PCa患者的预后和免疫治疗反应,有利于进一步指导临床实践。

关键词：细胞焦亡基因前列腺癌预后模型肿瘤微环境

高纯三氧化钼粒度对粉末冶金钼板工艺特性与力学性能影响

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中国钼业 2024年第1期48卷 35-39页

作者：杨秦莉赵虎厉学武崔玉青庄飞杜一辰高贤金堆城钼业股份有限公司技术中心陕西西安710077 陕西省先进钼冶金技术重点实验室陕西西安710077 陕西省四主体一联合含钼冶金技术重点实验室陕西西安710077

粉末冶金轧制制板工艺中,原始粉末颗粒对还原、烧结和轧板工艺特性以及钼板力学性能有着非常重要的影响。采用3种不同粒度高纯MoO_(3)进行还原、烧结和轧制制备0.5 mm厚的钼板试验,研究了3种不同粒度原始粉末颗粒对MoO_(2)、钼粉以及钼... 详细信息

粉末冶金轧制制板工艺中,原始粉末颗粒对还原、烧结和轧板工艺特性以及钼板力学性能有着非常重要的影响。采用3种不同粒度高纯MoO_(3)进行还原、烧结和轧制制备0.5 mm厚的钼板试验,研究了3种不同粒度原始粉末颗粒对MoO_(2)、钼粉以及钼板制备工艺性能和终板力学性能的影响。结果表明:经一段还原制备的3种MoO_(2)还原程度及微观形貌差异较大;二段不同还原工艺制备的钼粉指标也不同,大粒度钼粉的D50、D90/D50值都比小粒度钼粉的低,且团聚少,均匀分散;相同烧结、轧制工艺条件下,大粒度三氧化钼经还原、烧结制成的钼板坯性能较好;小粒度三氧化钼经950℃还原及后续加工制成的0.5 mm钼板力学性能较好。

关键词：三氧化钼粒度还原钼板性能

Thermo-Flow Performances for the Main-Auxiliary Integrated Natural Draft Dry Cooling System

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Journal of Thermal Science 2024年第3期33卷 1010-1025页

作者： ZHANG Zongyang HOU yichen ZHOU Hanyu JIA He CHEN Lei KONG Yanqiang WANG Weijia YANG Lijun du Xiaoze Key Laboratory of Power Station Energy Transfer Conversion and System of Ministry of Education School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China

Recently,natural draft dry cooling system with the main-auxiliary integrated air-cooled heat exchangers in the up and lower layers,has drawn attention to the electric power *** research firstly develops two physical models for the integrated cooling system,namely Case A and Case *** Case A,the main air-cooled heat exchanger is arranged in the upper layer and the auxiliary air-cooled heat exchanger arranged in the lower layer,while in Case B,the two heat exchanger systems are arranged in the opposite *** then,directing at the engineering TMCR and TRL 1 working conditions,the unit-local-overall thermo-flow characteristics of Case A and Case B are obtained and compared by numerical *** findings show that,for the auxiliary air-cooled exchanger,Case A has obviously higher cooling performances than Case B,with the difference varying from 5.46%to 7.55%.Whereas,for the main air-cooled exchanger,Case B shows the recovered cooling performances,with the difference changing from 1.15%to 2.99%.Case A is preferably recommended to the engineering application in consideration of more strict cooling demand of the auxiliary cooling ***,this research will provide some theoretical guidelines for the design and construction of the main-auxiliary integrated natural draft dry cooling system.

关键词： integrated dry cooling system main air-cooled heat exchanger auxiliary air-cooled heat exchanger upper layer and lower layer thermo-flow performances