上海城建职业学院（Shanghai Urban Construction Vocational College）简称“上城院”，创建于1956年，位于中国上海，是经上海市人民政府批准、教育部备案的全日制公办高等院校，由上海市教育委员会直属。位列“085工程”，是中国建设教育协会、中国高等教育学会等重要成员。 2016年4月，经上海市人民政府批准，并报教育部备案，由上海城市管理职业技术学院、上海建峰职业技术学院合并组建上海城建职业学院。2016年7月1日起，根据上海市群团改革工作安排，承接托管上海工会管理职业学院学历教育工作。学院占地面积762亩，建筑面积41.059万平方米，现有奉贤、杨浦、宝山三个校区，在校学生近12000人。 学院为首批上海市特色高职院校创建单位之一、上海市建筑职业教育集团牵头单位、中国建设教育协会理事长单位、教育部和建设部批准的全国建设行业技能型紧缺人才培养培训基地。 城建学院在长达近七十载年的办学历史中，刘建航、李道增、齐康、叶可明等一大批学术巨匠曾在此执教。上城院始终与国家民族的命运紧密相连，聚集了许多学者专家，培养了众多优秀人才，创造了大批重大科学成果，影响和推动了中国近现代土木工程科学的进程，并以其教育的高质量享誉海内外。以服务国家为己任，以培养人才为根本，以改革开放为动力，为实现中国梦作出新贡献。
In order to clarify the impact of basement-addition on existing pile foundations,a geotechnical centrifugal was carried out to simulate the basement-addition excavations in sandy strata.Considering existing working load at pile head in the geotechnical centrifugal,the effect of bearing characteristics of existing pile foundation during basement-addition excavations was studied.A reference for the assessment and redesign of the pile foundation for basement-addition construction of the existing building is provided.The results show that:(1)Considering the influence of the existing load,the load test is carried out after the load at pile head is held for about 9 days with 0.94 times the bearing capacity characteristic value at the prototype state.The bearing capacity of the test pile is about 6％higher than that of the test pile without considering the existing working load.In the redesign of existing pile foundations,duo to soil compaction at pile side and pile end caused by existing load at pile head,the improvement of bearing capacity can be properly considered.(2)For a friction pile with length of 20 m under the existing load,the bearing capacity loss rate is 11.5％and 37.9％when the excavation depth is 20％and 40％of the pile length,respectively.When the excavation depth is 40％of the pile length,the pile changes from friction end-bearing pile to friction end-bearing pile,and the axial force and the settlement of the pile increase greatly during the process.In practical engineering,the compressive strength of pile should be checked and the risk caused by the increase of settlement should be avoided.(3)When the excavation depth is 40％of the pile length,the side friction resistance decreases.This may be related to the softening of the side resistance,or the reduction of vertical soil stress around the pile caused by excavation.The specific reason needs further verification.In the estimation of bearing capacity of existing pile foundation,this effect should be considered.
Objective:To investigate the effectiveness of child care simulation teaching approach that integrates the EfficientDet detection algorithm with virtual reality technology.Methods:A virtual human-based teaching platform was developed using virtual reality technology.The EfficientDet detection algorithm was enhanced through the incorporation of a spatial attention mechanism and Laplacian pyramid decomposition to enable multi-category action detection.Furthermore,an integrated algorithm combining three-dimensional convolutional neural networks(3D-CNN)with bidirectional long short-term memory(Bi-LSTM)networks was employed to capture spatiotemporal features from video sequences and achieve accurate recognition of pediatric nursing actions.Results:The improved EfficientDet algorithm achieved a mean accuracy of 98.42%,processing up to 25.14 video frames per second.In the task of nursing action recognition,the 3D-CNN-Bi-LSTM model attained average accuracy rate,recall rate,and F1 scores of 95.24%,91.36%,and 93.68%,respectively,outperforming comparative algorithms.Nurses trained using the virtual human teaching platform demonstrated significantly better learning outcomes compared to those receiving traditional teaching.Conclusion:The proposed nursing action detection and recognition algorithms exhibit high precision and reliability.The simulation teaching framework based on these algorithms and virtual reality technology effectively enhance nurses' learning performance in pediatric nursing,offer a novel and promising solution for nursing education.
Objective:The present study was aimed to develop a rapid colorimetric method for the detection of gallic acid in tea based on the catalase-like activity of Co3O4-NC nanozyme.Methods:The Co3O4-NC was prepared by calcination of the composite material of zeolitic imidazolate frameworks-67(ZIF-67)and polydopamine.The letramethylbenzidine(TMB)could be oxidized to blue oxTMB in the presence of H2O2 by Co3O4-NC nanozyme,while the addition of gallic acid would restrain the catalase-like activity and the color of the solution will be lighter.Based on the mechanism,a colorimetric sensing platform for the detection of gallic acid was established.Results:The linear curve between ΔA and GA concentration was observed within the range of 0.25～20.00 μmol/L,the linear equation was ΔA=0.0310C+0.0384(R2=0.995),the limit of detection(LOD,3v/S)was 0.077 μmol/L and the limit of quantitation(LOQ,10σ/S)was 0.26 μmol/L.Conclusion:The method could be applied to detect gallic acid equivalent(GAE)in tea,and the GAE in green tea,black tea and oolong tea were tested as 2.33％,1.82％,and 0.46％,respectively.The recovery rates ranged from 90.97％to 105.22％with RSD＜5％,indicating that the colorimetric method had a good application prospect.
Using metabolomics,this study explored the relationship between the quality deterioration and the metabolic changes in refrigerated large yellow croaker(Larimichthys crocea)during refrigeration.Key differential metabolites associated with quality deterioration across fish samples after 0,9,and 18 days of refrigeration were identified by gas chromatography-quadrupole-time-of-flight mass spectrometry,and the metabolic pathways in which the differential metabolites may be involved were analyzed.The results showed that as refrigeration time increased,the types and contents of metabolites such as amino acids,carbohydrates,and nucleotides significantly changed in large yellow croaker muscle.The differential metabolites were primarily concentrated in amino acid metabolism pathways,such as arginine and proline metabolism;glycine,serine,and threonine metabolism;and cysteine and methionine metabolism.Proline,glutamate,isoleucine,glycine,methionine,tyrosine,valine,guanosine,uracil,ribose,thymidine,xanthine,and 5'-inosine monophosphate were identified as key differential metabolites.The degradation of amino acids and the generation of biogenic amines were closely related to the decline in the freshness and shelf life of large yellow croaker,while the degradation of nucleotide substances was related to the decrease in the taste.
An in vitro simulation of digestion and fermentation model with feces bacteria was used to explore the probiotic capacity of Polyonatum cyrtonema Hua.polysaccharide(PCP)by 16S rDNA gene sequencing and determining changes in short-chain fatty acids via GC-MS.The results showed that the digestibility of PCP was not obviously found by in vitro simulating saliva-gastrointestinal digestion model.The addition of PCP could rapidly reduce the pH of fermentation broth.PCoA analysis showed that PCP had the effect of altering gut microbiota,which was similar with inulin.At the phylum level,compared to the blank control group,the relative abundance of Firmicutes and Actinomycetes was significantly increased(P＜0.05)in the PCP group,while that of Proteobacteria was significantly decreased(P＜0.05).At the genus level,the growth of beneficial bacteria Bifidobacterium and Megamonas was significantly promoted(P＜0.05),while the growth of opportunistic bacteria Enterobacter and Escherichia-Shigella was significantly inhibited(P＜0.05).Moreover,PCP greatly increased the contents of short-chain fatty acids,among which the contents of acetic acid and propionic acid were significantly increased(P＜0.05).The present results suggest that PCP may enhance the production of short-chain fatty acids via gut microbiome regulation.
