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“Hot street”of crime detection in London borough and lockdown impacts

Geo-Spatial Information Science 2023年第4期26卷 716-732页

作者： yuying wu Yijing Li CUSP London Department of InformaticsKing’s College LondonLondonUK

In recent years,the police intervention strategy“Hot spots policing”has been effective in combating ***,as cities are under the intense pressure of increasing crime and scarce police resources,police patrols are expected to target more accurately at finer geographic units rather than ballpark“hot spot”*** study aims to develop an algorithm using geographic information to detect crime patterns at street level,the so-called“hot street”,to further assist the Criminal Investigation Department(CID)in capturing crime change and transitive moments *** algorithm applies Kernel Density Estimation(KDE)technique onto street networks,rather than traditional areal units,in one case study borough in London;it then maps the detected crime“hot streets”by crime *** was found that the algorithm could successfully generate“hot street”maps for Law Enforcement Agencies(LEAs),enabling more effective allocation of police patrolling;and bear enough resilience itself for the Strategic Crime Analysis(SCA)team’s sustainable utilization,by either updating the inputs with latest data or modifying the model parameters(*** kernel function,and the range of spillover).Moreover,this study explores contextual characteristics of crime“hot streets”by applying various regression models,in recognition of the best fitted Geographically Weighted Regression(GWR)model,encompassing eight significant contextual factors with their varied effects on crimes at different *** discussed the impact of lockdown on crime rates,it was apparent that the land-use driven mobility change during lockdown was a fundamental reason for changes in ***,these research findings have provided evidence and practical suggestions for crime prevention to local governors and policy practitioners,through more optimal urban planning(*** Traffic Neighborhoods),proactive policing(*** the listed top 10“Hot Streets”of crime),publicizing of laws and regulations,and installations

关键词： Hot street crime kernel density estimation spatial regression lockdown mobility change

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Enteromorpha prolifera polysaccharide-Fe(Ⅲ) complex promotes intestinal development as a new iron supplement

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Science China Life Sciences 2025年第1期 219-231页

作者： Yingying Feng yuying wu Jialu Wang Zhenglin Dong Qian Yu Shuangshuang Xia Chunxue Liu Haihua Wang Xin wu Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences CAS Key Laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical AgricultureChinese Academy of Sciences ANYOU Biotechnology Group Co.Ltd Qingdao Seawin Biotech Group Co. LTD

Iron is a crucial micronutrient, and its deficiency can have detrimental effects on the health of infants. Dietary polysaccharide-iron(Ⅲ) complexes(PICs) are promising for addressing iron deficiency due to their minimal adverse reactions and high iron absorption rate. This study aimed to investigate the effects of dietary Enteromorpha prolifera polysaccharide-Fe(Ⅲ) complex(EP-Fe) on newborns, using 3-day weaned piglets as the iron-deficiency model. Results showed that EP-Fe improved iron levels and promoted intestinal development in piglets. Transcriptome sequencing revealed that EP-Fe increased the survival of intestinal epithelial cells under hypoxia by upregulating the expression of genes that promote the development of the vascular system. Additionally, EP-Fe enhanced the mucosal barrier functions by inhibiting myosin light chain kinase(MLCK)/phosphorylated myosin light chain(p-MLC) signaling pathway to increase the expression of intestinal tight junction proteins. Furthermore, the 16S r RNA gene sequencing of gut microbiota showed that EP-Fe promoted the enrichment of Bacteroides＿fragilis and other gut microbes that can metabolize carbohydrates. In conclusion, EP-Fe is an effective iron supplement for newborns, and it can be developed as a comprehensive nutritional supplement.

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Microstructural Characterization and Mechanical Properties of VB_2/A390 Composite Alloy

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Journal of Materials Science & Technology 2015年第10期31卷 1027-1033页

作者： Xiaoli Cui yuying wu Xiangfa Liu Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong University

In this work, we make the best use of the vanadium element; a series of A1-V-B alloys and VB2/A390 composite alloys were fabricated. For Ak-10V-6B alloy, the grain size of VB2 can be controlled within about 1 μm and is distributed uniformly in the AI matrix. Further, it can be found that VB2 promises to be a useful reinforcement particle for piston alloy. The addition of VB2 can improve the mechanical properties of the A390 composite alloys significantly. The results show that with 1 % VB2 addition, A390 composite alloy exhibits the best performance. Compared with the A390 alloy, the coefficient of thermal expansion is 13.2 × 10^-6 K-1, which decreased by 12.6%; the average Brinell hardness can reach 156.5 HB, wear weight loss decreased by 28.9% and ultimate tensile strength at 25℃ （UTS25 ℃） can reach 355 MPa, which increased by 36.5%.

关键词： AI alloy matrix composites Mechanical properties Particle-reinforced composites Microstructural characterization

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Photo-degradation organic dyes by Sb-based organic-inorganic hybrid ferroelectrics

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Journal of Environmental Sciences 2021年第3期33卷 145-155页

作者： yuying wu Zhangran Gao Xiaofan Sun Hongling Cai Xiaoshan wu Collaborative Innovation Center of Advanced Microstructures Laboratory of Solid State Microstructures and School of PhysicsNanjing UniversityNanjing 210093China

The organic-inorganic hybrid halide compounds have emerged as one of the most promising photoelectric material for their superior optoelectronic properties and hold great prospects for renewable energy substitutes and environmental protection as ***,we report the optical properties of the Sb-based organic-inorganic hybrid ferroelectric materials:pyridine-4-aminium tetrachloroantimonate((C_(5)H_(7)N_(2))SbCl_(4),sample 1),piperidin-1-aminium tetrachloroantimonate((C_(5)H_(13)N_(2))SbCl_(4),sample 2)and tris(trimethylammonium)nonachlorodiantimonate(((CH_(3))_(3)NH)_(3)Sb_(2)Cl_(9),sample 3),which are a kind of exploited efficient *** 2 and 3 exhibit distinct photoelectric respond,which are mainly ascribed to their minor narrow band-gap compared with sample *** the ferroelectrics,the intrinsic of spontaneous polarization of sample 3 at room temperature is favourable for the separation of photogenerated electrons and holes within the photorespond ***,sample 3 shows the highest efficiency of photo-decomposed Rhodamine B(90.2%within 80 min)and Methyl Orange(MO)(97.4%within 50 min),thanks to the photo-excited electrons and holes promoting the formation of oxidative radical species during the photo-redox *** findings prove that the development of a novel Sbbased organic-inorganic hybrid halide compounds with good stability in the degradation of organic dyes paves a way to designing new photocatalyst.

关键词： Organic-inorganic hybrid halide compounds Photoelectric Photogenerated electrons and holes Photo-degradation

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Eutectic nucleation in Al-25wt.% Si alloy through DSC

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Rare Metals 2010年第1期29卷 62-65页

作者： wu yuying LIU Xiangfa JIANG Binggang HUANG Chuanzhen Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University Jinan 250061 China School of Mechanical Engineering Shandong University Jinan 250061 China

Eutectic nucleation in hypereutectic Al-25wt.%Si alloy with the addition of P was studied by calculating the activation energy and nucleation work. The results indicate that P refinement, which can decrease the activation energy as well as nucleation work of eutectic solidification, can increase the eutectic nucleation frequency of Al-25wt.%Si alloy, so the addition of P can refme the eutectic structures of hypereutectic Al-Si alloys. According to the calculations, there is a certain relationship between the precipitation of primary silicon and eutectic solidification, and the eutectic nucleation mode is independent of morphology transition.

关键词： aluminum alloys refinement differential scanning calorimeter eutectic silicon eutectic nucleation

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Influence of Deformation on the Microstructure and Low-temperature Refining Behavior of Al-3.5P Master Alloy

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Journal of Materials Science & Technology 2015年第4期31卷 391-396页

作者： Huan Qiao Xiangzhen Zhu Tong Gao yuying wu Xiangfa Liu Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong University

In this paper,the influence of deformation on the microstructure and low-temperature refining behavior of Al-3.5P master alloy was *** results show that the average size of AIP particles can be reduced obviously from 15.3 μm to about 2.1 μm by ***,it exhibits entirely opposite influence on refining performance when A1-3.5P master alloy was deformed at room temperature and high temperature,*** when Al-3.5P master alloy was subjected to thermal deformation,can an improvement of low-temperature refining performance be *** this condition,primary Si in A390 alloy can be refined from 137 to 21 μm,making it a potential candidate for die casting production.A mechanism associated with the transformation of particle-matrix interface during deformation has been proposed and further experiment has been designed to validate it.

关键词： Al-Si alloy A-P master alloy Deformation Grain ref

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Do trace metal(loid)s in road soils pose health risks to tourists?A case of a highly-visited national park in China

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Journal of Environmental Sciences 2022年第1期34卷 61-74页

作者： Jingling Huang yuying wu Yanyao Li Jiaxun Sun Yujing Xie Zhengqiu Fan Department of Environmental Science and Engineering Fudan UniversityShanghai 200433China

Nowadays,more people tend to spend their recreational time in large national parks,and trace metal(loid)s in soils have attracted long-term attention due to their possible harm to human *** investigate the pollution levels,potential sources and health risks of trace metal(loid)s in road soils,a total of eight trace metal(loid)s(including As,Cd,Cr,Cu,Ni,Pb,Zn and Hg)from 47 soil samples along roads were studied in the Huangshan National Park in Southeast *** results showed that the concentrations of As,Cd,Pb,Zn and Hg appeared different degrees of pollution compared with their corresponding background *** to the pollution indices,Hg and Cd were recognized as significant pollutants presenting moderate to high ecological *** principal component analysis and positive matrix factorization model,the results showed that traffic,industrial,agricultural and natural sources were the potential origins of trace metal(loid)s in this area,with contribution rates of 39.93%,25.92%,10.53%and 23.62%,***-carcinogenic risks were all negligible,while the carcinogenic risk of As was higher than the limit(1×10^(-6)).Moreover,children were more susceptible to trace metal(loid)s by ingestion which appeared to be a more important exposure pathway than dermal contact and *** contribution rates of different sources to non-carcinogenic risks and carcinogenic risks were similar among children and adults,while traffic and industrial sources have a significant impact on health *** study will give more insights to control the environmental risks of trace metal(loid)s in national parks.

关键词： Trace metal(loid)s Pollution assessment Source apportionment Health risk assessment National park

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Dietary lysozyme improves growth performance and intestinal barrier function of weaned piglets

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Animal Nutrition 2023年第3期14卷 249-258页

作者： yuying wu Bei Cheng Longxiang Ji Xiangyun Lv Yingying Feng Liu’an Li Xin wu Tianjin Key Laboratory of Agricultural Animal Breeding and Healthy Husbandry College of Animal Science and Veterinary MedicineTianjin Agricultural UniversityTianjin300384China Tianjin Institute of Industrial Biotechnology Chinese Academy of SciencesTianjin300308China Zhumadian Huazhong Chia Tai Co. Ltd.Zhumadian463000China

Lysozyme(LZ)is a purely natural,nonpolluting and nonspecific immune factor,which has beneficial effects on the healthy development of *** this study,the influences of LZ on the growth performance and intestinal barrier of weaned piglets were studied.A total of 48 weaned piglets(Landrace×Yorkshire,22 d old)were randomly divided into a control group(basal diet)and a LZ group(0.1%LZ diet)for 19 *** results showed that LZ could significantly improve the average daily gain(ADG,P<0.05)and average daily feed intake(ADFI,P<0.05).LZ also improved the intestinal morphology and significantly increased the expression of occludin in the jejunum(P<0.05).In addition,LZ down-regulated the expression of interleukin-1β(IL-1β,P<0.05)and tumor necrosis factor-a(TNF-a,P<0.05),and inhibited the expression of the genes in the nuclear factor-k-gene binding(NF-κB,P<0.05)signaling *** importantly,the analysis of intestinal flora showed LZ increased the abundance of Firmicutes(P<0.05)and the ratio of Firmicutes to Bacteroidota(P=0.09)at the phylum level,and increased the abundance of Clostridium_sensu_stricto_1(P<0.05)and reduced the abundance of Olsenella and Prevotella(P<0.05)at the genus *** short,this study proved that LZ could effectively improve the growth performance,relieve inflammation and improve the intestinal barrier function of weaned *** findings provided an important theoretical basis for the application of LZ in pig production.

关键词： Lysozyme Growth performance Intestinal barrier Intestinal flora Weaned piglet

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In-situ formation of Al-CaB_6 composites with low resistivity

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Rare Metals 2012年第6期31卷 578-581页

作者： Cui Xiaoli wu yuying Zhu Xiangzhen Liu Xiangfa Shandong Univ Key Lab Liquid Solid Struct Evolut & Proc Mat Minist Educ Jinan 250061 Peoples R China

In this work, in-situ CaB6 reinforced aluminum matrix composites were fabricated, and the microstructure, resistivity, microhardness and coefficient of thermal expansion (CTE) of Al-CaB6 composites were studied. It is found that CaB6 compounds can be formed by reducing reaction occurred in the Al melt: . CaB6 exhibits a hexahedron morphology and distributes uniformly in the Al alloy matrix. The resistivity of Al-CaB6 composites is 3.02*10-8 Ω·m, which is close to that of pure Al and lower than that of 6063Al/Ga composites. The average microhardness of Al-CaB6 composites can reach 1270 MPa, 259.8% higher than that of pure Al. Compared to pure Al, the CTE of Al-CaB6 composites is much lower.

关键词： in-situ synthesis electron microscopy composite CaB6

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Revealing the promising near-room-temperature thermoelectric performance in Ag_(2)Se single crystals

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Journal of Materiomics 2023年第4期9卷 754-761页

作者： Siqi Lin Linlin Guo Xianghu Wang Yue Liu yuying wu Rongbin Li Hezhu Shao Min Jin College of Materials Shanghai Dianji UniversityShanghai201306China School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai200093China College of Electrical and Electronic Engineering Wenzhou UniversityWenzhou325035China

With high carrier mobility and intrinsic low lattice thermal conductivity,Ag_(2)Se compounds have attracted increasing attention for thermoelectric application near room *** to its phase transition at~406 K and resulting thermal volume expansion,the growth and thermoelectric properties of large-sized Ag_(2)Se single crystals have seldom been reported so *** this work,the vertical Bridgeman method was used for growing bulk Ag_(2)Se single crystal,with an orientation preference along lowsymmetric(201)*** Hall mobility as high as 2000 cm^(2)/(V·s)and weak electron-phonon coupling contributes to a high electronic quality BE of~7.0 in near-room-temperature b-Ag_(2)Se single crystals,which is superior to the high-temperature phase a-Ag_(2)*** observed low lattice thermal conductivity of 0.8 W/(m·K)at 300 K is due to the low group speeds and strong anharmonicity.A promising peak zT of 0.66 at 375 K and an average zT of 0.65 at 300-375 K were realized in b-Ag_(2)Se *** low Vickers hardness and good ductile properties were confirmed by experiment and theoretical *** work not only synthesized large-sized and highly-orientated Ag_(2)Se crystals,but also revealed its great potential of thermoelectric performance and mechanical properties for various applications near room temperature.

关键词： Thermoelectrics Single crystals High electronic quality factor Low lattice thermal conductivity Near-room-temperature

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