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Automatic modelling of urban subsurface with ground-penetrating radar using multi-agent classification method

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Geo-Spatial Information Science 2022年第4期25卷 588-599页

作者： Tess Xianghuan Luo Pengpeng Yuan song zhu Guangdong Key Laboratory of Urban Informatics Shenzhen UniversityShenzhenChina Department of Land Surveying and Geo-informatics The Hong Kong Polytechnic UniversityHong KongChina College of Civil and Transportation Engineering Shenzhen UniversityShenzhenChina

The subsurface of urban cities is becoming increasingly ***-time records of subsur-face structures are of vital importance for the maintenance and management of urban infrastructure beneath or above the ***-penetrating radar(GPR)is a nondestructive testing method that can survey and image the subsurface without ***,the interpretation of GPR relies on the operator’s *** automatic workflow was proposed for recognizing and classifying subsurface structures with GPR using computer vision and machine learning *** workflow comprises three stages:first,full-cover GPR measurements are processed to form the C-scans;second,the abnormal areas are extracted from the full-cover C-scans with coefficient of variation-active contour model(CV-ACM);finally,the extracted segments are recognized and classified from the corresponding B-scans with aggregate channel feature(ACF)to produce a semantic *** selected computer vision methods were validated by a controlled test in the laboratory,and the entire workflow was evaluated with a real,on-site case *** results of the controlled and on-site case were both *** study establishes the necessity of a full-cover 3D GPR survey,illustrating the feasibility of integrating advanced computer vision techniques to analyze a large amount of 3D GPR survey data,and paves the way for automating subsurface modeling with GPR.

关键词： Subsurface modeling ground-penetrating radar computer vision active contour model aggregate channel feature

Comparison of Grain Size in Plain Carbon Hot-Rolled Sheets Manufactured by CSP and Conventional Rolling Processing

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Journal of Iron and Steel Research International 2012年第1期19卷 17-22页

作者： zhu Xue-song zhu Guo-hui MAO Wei-min School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China School of Materials Science and Engineering Anhui University of Technology Ma＇anshan 243002 Anhui China

Average grain size and grain size distribution in as hot-rolled SPHC, SPHD, and SPHE sheets manufac- tured by compact strip production （CSP） processing and traditional continuous casting and rolling （CCR） processing respectively were investigated by quantitative metallographic method. The results show that the average grain size and distribution width of grain size in sheets manufactured by CSP processing was obviously larger than that by CCR processing. It was analyzed that multi-phase transformation and high reduction ratio in CCR processing resulted in refining grain size, which would be dominant reason for controlling grain size. In plain carbon steels such as SPHC, SPHD and SPHE, the effect of fine precipitation in CSP on behavior of deformation and recrystallization of austenite during roiling, and consequent refinement of grain size seem not to be as important as the effect of reheating and roughing in CCR processing. Homogenizing in reheating and refining grain size in roughing in CCR processing would refine final grain size and also make grain size homogenized, Very coarse grain size would result in mixed grain size, large distribution width of grain size due to interaction of static and dynamic recrystallization in CSP processing

关键词： CSP CCR hot-rolled plate grain size

Empilrical Likelihood for Non-parametric Regression Models with Missing Responses:Multiple Design Case

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Acta Mathematicae Applicatae Sinica 2011年第1期27卷 1-12页

作者： Qing-zhu Lei Yong-song Qin School of Mathematical Sciences Guangxi Normal University Guilin Guangxi 541004 China

Empirical likelihood （EL） ratio statistic on θ=g（x） is constructed based on the inverse probability weighted imputation approach in a nonparametric regression model Y = g（x）＋ε （x ∈ [0, 1]p） with fixed designs and missing responses, which asymptotically has X1^2 distribution. This result is used to obtain a EL based confidence interval on θ.

关键词： Nonparametric regression empirical likelihood missing at random confidence interval

Airfoil Aeroelastic Flutter Analysis Based on Modified Leishman-Beddoes Model at Low Mach Number

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Chinese Journal of Aeronautics 2011年第5期24卷 550-557页

作者： SHAO song zhu Qinghua ZHANG Chenglin NI Xianping Science and Technology on Rotorcraft Aeromechanics Laboratory Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

Based on modified Leishman-Beddoes （L-B） state space model at low Mach number （lower than 0.3）, the airfoil aeroelastic system is presented in this paper. The main modifications for L-B model include a new dynamic stall criterion and revisions of normal force and pitching moment coefficient. The bifurcation diagrams, the limit cycle oscillation （LCO） phase plane plots and the time domain response figures are applied to investigating the stall flutter bifurcation behavior of airfoil aeroelastic systems with symmetry or asymmetry. It is shown that the symmetric periodical oscillation happens after subcritical bifurcation caused by dynamic stall, and the asymmetric periodical oscillation, which is caused by the interaction of dynamic stall and static divergence, only happens in the airfoil aeroelastic system with asymmetry. Validations of the modified L-B model and the airfoil aeroelastic system are presented with the experimental airload data of NACA0012 and OA207 and experimental stall flutter data of NACA0012 respectively. Results demonstrate that the airfoil aeroelastic system presented in this paper is effective and accurate, which can be applied to the investigation of airfoil stall flutter at low Mach number.

关键词： low Mach number unsteady aerodynamics airfoil aeroelastic system stall flutter bifurcation

Comparison and Analysis of CO_2 Emissions Data for China

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Advances in Climate Change Research 2014年第1期5卷 17-27页

作者： zhu song-Li Energy Research Institute National Development and Reform Commission

This paper reviews the CO2emissions data for China provided by various international organizations and databases(namely IEA,BP,EDGAR/PBL/JRC,CDIAC,EIA and CAIT)and compares them with China’s official data and *** difference among these data is due to different scopes,methods and underlying data,and particularly the difference in fossil fuel *** with data from other databases,IEA and CAIT data have the best comparability with China’s official *** paper recommends that China enhance its coal statistics,raise the frequency of official data publication and improve the inventory completeness.

关键词： CO2 emissions data comparability

Postnatal calpeptin treatment causes hippocampal neurodevelopmental defects in neonatal rats

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Neural Regeneration Research 2019年第5期14卷 834-840页

作者： zhu-Jin song San-Juan Yang Lan Han Bin Wang Guoqi zhu Key Laboratory of Xin'an Medicine Ministry of Education Anhui University of Chinese Medicine School of Pharmacy Anhui University of Chinese Medicine

Our previous studies showed that the early use of calpain inhibitors reduces calpain activity in multiple brain regions, and that postnatal treatment with calpeptin may lead to cerebellar motor dysfunction. However, it remains unclear whether postnatal calpeptin application affects hippocampus-related behaviors. In this study, Sprague-Dawley rats were purchased from the Animal Center of Anhui Medical University of China. For the experiments in the adult stage, rats were intraperitoneally injected with calpeptin, 2 mg/kg, once a day, on postnatal days 7–14. Then on postnatal day 60, the Morris water maze test was used to evaluate spatial learning and memory abilities. The open field test was carried out to assess anxiety-like activities. Phalloidin staining was performed to observe synaptic morphology in the hippocampus. Immunohistochemistry was used to count the number of NeuN-positive cells in the hippocampal CA1 region. DiI was applied to label dendritic spines. Calpeptin administration impaired spatial memory, caused anxiety-like behavior in adulthood, reduced the number and area of apical dendritic spines, and decreased actin polymerization in the hippocampus, but did not affect the number of NeuN-positive cells in the hippocampal CA1 region. For the neonatal experiments, neonatal rats were intraperitoneally injected with calpeptin, 2 mg/kg, on postnatal days 7 and 8. Western blot assay was performed to analyze the protein levels of Akt, Erk, p-Akt, p-Erk1/2, Erk1/2, SCOP, PTEN, mTOR, p-mTOR, CREB and p-CREB in the hippocampus. SCOP expression was increased, and the phosphorylation levels of Akt, mTOR and CREB were reduced in the hippocampus. These findings show that calpeptin administration after birth affects synaptic development in neonatal rats by inhibiting the Akt/mTOR signaling pathway, thereby perturbing hippocampal function. Therefore, calpeptin administration after birth is a risk factor for neurodevelopmental defects.

关键词： nerve regeneration postnatal calpeptin learning and memory hippocampus spine development SCOP AKT mTOR neural regeneration

Nonphytotoxic copper oxide nanoparticles are powerful“nanoweapons”that trigger resistance in tobacco against the soil-borne fungal pathogen Phytophthora nicotianae

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Journal of Integrative Agriculture 2022年第11期21卷 3245-3262页

作者： CHEN Juan-ni WU Lin-tong song Kun zhu Yun-song DING Wei Laboratory of Natural Product Pesticides College of Plant ProtectionSouthwest UniversityChongqing 400715P.R.China Jingxi Marketing Department of Basie of Guangxi Tobacco Company BaiseGuangxi 533899P.R.China

Investigations into the potential application of nanoparticles acting as nanofungicides in sustainable agriculture are rapidly expanding due to the high antimicrobial properties of these compounds,which do not risk inducing pathogen resistance to fungicides.A detailed understanding of the impact of copper oxide nanoparticles(CuO NPs)on soil-borne phytopathogenic fungi is yet to be *** study aimed to explore the in vitro antifungal activity and control efficacy of CuO NPs applied via irrigation with respect to tobacco black shank(TBS)disease caused by Phytophthora *** results revealed that CuO NPs greatly interfered with the reproductive growth process of this fungus,repressing hyphal growth,spore germination and sporangium ***,morphological damage,intracellular ROS accumulation and increased SOD enzyme activity in hyphae were the antifungicidal mechanisms of these *** pot experiments,treatment with CuO NPs at 100 mg L^(–1)significantly suppressed TBS development,compared with the effect on control plants,and the control efficacy reached 33.69%without inducing *** to CuO NPs significantly activated a series of defense enzymes,and resistance genes in tobacco can further explain the mechanisms by which CuO NPs suppressed fungal *** Cu content in both the leaves and roots of ***-infested plants increased by 50.03 and 27.25%,respectively,after treatment with 100 mg L^(–1)CuO NPs,compared with that of healthy *** particular,a higher Cu content was observed in infected roots than in ***,this study showed the potential of CuO NPs applied as nanofungicides and as nanoinducers of fungus resistance genes for the management of TBS through inhibition of pathogen infection and stimulation of plant defenses.

关键词： Nicotiana tabacum L. tobacco black shank disease cupper oxide nanoparticles fungicidal activities defense response stimulant

Correction of mandibular deficiency by inverted-L osteotomy of ramus and iliac crest bone grafting

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International Journal of Oral Science 2012年第4期4卷 214-217页

作者： song-song zhu Ge Feng Ji-Hua Li En Luo Jing Hu The State Key Laboratory of Oral Diseases Sichuan University Department of Oral and Maxillofacial Surgery West China School of StomatologySichuan University

This study was to describe the use of inverted-L osteotomy of ramus and lilac bone graft for the management of mandibular deficiency in adult patients. From 2008 to 2010, 11 patients （aged 19 to 29 years） with mandibular deficiency underwent intraoral or extraoral inverted-L osteotomy of ramus and lilac crest bone grafting. Data were collected from the patients＇ records, photographs and radiographs. The height and width of the ramus were successfully expanded by inverted-L osteotomy and lilac crest bone grafting with minimal complications in all patients, resulting in significant improvement in occlusion and facial appearance. Our early results showed that the inverted-L osteotomy of ramus and lilac crest bone grafting is safe and effective, and should be considered as a good alternative for the patients with mandibular deficiency.

关键词： bone graft inverted-L osteotomy mandibular deficiency treatment

Silver(I) Oxide Mediated Regioselective Monoacylation of 2,4-Dihydroxyls in L-Rhamnopyranosides

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Chinese Chemical Letters 2006年第8期17卷 1009-1012页

作者： Qian YANG Xing Mei zhu Jin song YANG Ministry of Education Key Laboratory of Drug Targeting School of Pharmacy Sichuan University Chengdu 610041

A series of acyls （Ac, Bz and Ts） were introduced regioselectively to the 2-hydroxyl in methyl and ally 3-O-benzyl-α-L-rhamnopyranosides mediated by silver（I） oxide in the presence of a catalytic amount of potass... 详细信息

关键词： Silver(Ⅰ) oxide acylation regioselectivity,α-L-rhamnopyranoside.