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30 September 2018, Volume 28 Issue 3 Previous Issue    Next Issue
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Technology Theory and Application
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Technology Theory and Application

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Study on Structure Disease and Maintenance Method of Concrete at Upper Part of Common Highway Bridge YU Hong-xing, LIU Guo-hui 2018, 28(3): 1-5.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.001 Abstract ( )   PDF (922KB) ( )   Structure disease of concrete at upper part of common highway bridge is the key factor for maintenance and evaluation of bridge.Based on the analysis of 125common highway bridges with concrete girder structure in Tianjin City,the types of diseases,reasons and maintenance methods are analyzed in this paper.The research results show that the proportion of slab girder bridge,T girder bridge and box girder bridge is 70.4%,20.7%and 8.9%respectively.Six main disease types and seven main maintenance methods for common highway concrete bridges are summarized.The common disease of slab girder bridge is transverse crack at the bottom of girder with more than 61.1%incidence.And the common disease of T girder bridge and box girder bridge is vertical or oblique crack at the belly of girder with incidence of 64.3%and 75%,respectively.The most common maintenance method of slab girder is to repair in part,the utilization ratio of such method is up to 66.3%.The common maintenance method of T girder and box girder is deck reinforcement and fracture sealing,the utilization ratio is up to 50%and 83.3%,respectively.The research results show that the disease type incidence and maintenance method utilization of bridge are closely related with the structure forms of bridge.These research results will provide the reference for maintenance and reinforcement of bridge. References | Related Articles | Metrics

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Test and Numerical Analysis of Reinforcement Effect of Concrete Hollow Slab Girder with Carbon Fiber LI Bin, YU Hong-xing 2018, 28(3): 6-11.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.002 Abstract ( )   PDF (2942KB) ( )   In order to study the reinforcement effect of concrete hollow slab girder with pasting carbon fiber,comprehensive comparison analysis of concrete hollow slab girder with or without carbon fiber was conducted to investigate the ultimate bearing capacity,mid-span deflection and steel strains through static loading test and finite element method.The test and numerical calculation results show that pasting carbon fiber can effectively improve the ultimate bearing capacity of bridge with 13.3%increase.Pasting carbon fiber at the bottom of girder can enhance the bending rigidity against deflection,and effectively improve the tensile strength of steel in tension area of girder,as well as the capacity against deformation of exterior load.Hence the mid-span deflection and steel strain reduced amplitude of girder can reach 30%.Therefore,pasting carbon fiber can provide more safe condition for tensile strength of bottom of girder body. References | Related Articles | Metrics

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Development of a 10kV Dry Transformer Coil Material Detector LU Wen-mei, TIAN Shu-ren, JIA Xin-li, LIU Guo-ting, ZUO Zhong-shan, SHI Pei-yu 2018, 28(3): 12-16.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.003 Abstract ( )   PDF (2160KB) ( )   This paper introduces the design method of hardware system and software system of a 10kV intelligent dry transformer coil material detector.The detector can identify the transformer coil material without disassembling the transformer and without loss,and can also measure the characteristic parameters,direct resistance,and capacity of transformer.The field results verify the high reliability and convenient operation of the detector. References | Related Articles | Metrics

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Applied Research of Rational Formula in Hydrologic Analysis for Small Bridges and Culverts ZHAI Guo-jing 2018, 28(3): 17-23.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.04 Abstract ( )   PDF (268KB) ( )   The rational formula method which belongs to hydrologic analysis and calculation methods of small bridges and culverts is widely applied in the industries of highway,railway and water conservancy at home and abroad because of its simple reasoning formula and clear physical conception of parameters.This paper summarizes the fundamental form of the rational formula systematically.Based on the application of different rational formulas and the comparison between the formulas and other methods,it proposes the existing problems of the rational formula in application,such as the uncertainty of calculation result,unnecessary connection between the calculation result precision and the formula structure,unobvious advantage of the rational formula compared with the empirical formula,and etc.In the end,the paper puts forward three suggestions,the first is to enhance the parameter research of runoff yield and concentration in watershed,the second is to develop the research on the rational formula structure,the third is to strengthen the research on the rational formula applicability in overseas. References | Related Articles | Metrics

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Application of Total Station Scanner in Monitoring of Silo Inclination XIA Hai-ning, PANG Shi-chen 2018, 28(3): 24-28.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.005 Abstract ( )   PDF (1308KB) ( )   Based on the observation of silo inclination,the advantages of the total station scanner in the monitoring of the building’s inclination deformation are analyzed in this paper.The Leica MS50total station scanner is used to scan and monitor the main body of the silo.The point cloud data is unified into the same independent coordinate system with free stationing and resection.After splicing,apoint cloud data model is formed,and the silo inclination is calculated.The measurement data of total station instrument is compared with the monitoring data of the total station scanner,and the difference between the silo inclined rate is within one thousandth,which is within the acceptable range.The traditional observation method has certain defects in its observation accuracy and cycle,which results in low observation accuracy,long cycle,and harsh environmental requirements during observation.It often fails to meet the needs of deformation monitoring operations.The Leica MS50total station scanner can acquire the point cloud data of the complete target.Compared with GPS and total station instrument,its density of mining point is high,which can express the details of the monitoring target,and has important value in the monitoring of silo inclination. References | Related Articles | Metrics

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Discussion on Relationship between Concept of Water Resources Rational Allocation and Carrying Capacity with Sustainable Development LIU Chang-lin 2018, 28(3): 29-31.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.006 Abstract ( )   PDF (160KB) ( )   The reasonable use of water resources is the inevitable requirement of sustainable development,as well as the essential condition of sustainable development,and it has a significant role in the sustainable development in our country.In this paper,starting from the connotation of sustainable development,the concept of water resources rational allocation and carrying capacity in the sustainable development is briefly analyzed.Then based on the relationship between water resources reasonable allocation and carrying capacity with sustainable development,the reasonable application strategy of water resources is put forward to provide guidance and reference for the future research work. References | Related Articles | Metrics

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Analysis on Representativeness and Characteristics of Precipitation Series in Renqiu WANG Ji-jie, ZHANG Yuan-yuan 2018, 28(3): 32-37.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.007 Abstract ( )   PDF (1674KB) ( )   The magnitude and variation of precipitation directly reflects the status of regional natural water resources.In this paper,the data of rainfall stations in Renqiu and its surrounding area is taken to analyze the variation of annual precipitation series in Renqiu by using the statistical method.The representativeness of the two annual precipitation series and the time-space variation of precipitation during the years from 1956to 2015and the years from 1981to 2015are also analyzed. References | Related Articles | Metrics

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Analysis on Current Flood Discharge Capacity of Douhe River in Section of Tangshan City LIU Yu-wei 2018, 28(3): 38-44.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.008 Abstract ( )   PDF (1275KB) ( )   In order to analyze the flood discharge capacity of Douhe River in section of Tangshan City after comprehensive improvement,this paper utilizes the measured data of transverse and longitudinal section in Douhe River of Tangshan section,and adopts the calculation formula of steady non-uniform flow in natural river to calculate the flood discharge capacity.Then it recons the flood level of the sections with different flood discharge capacity,finds out the water-blocking reach and section affecting flood discharge,and offers the measures and suggestions for promoting the capacity of flood. References | Related Articles | Metrics

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How to Do Well File Management of Linear Large Water Conservancy Project WANG Hui 2018, 28(3): 45-48.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.009 Abstract ( )   PDF (192KB) ( )   How to ensure the reality,integrity and aboriginality of project files is the attentive problem for the project construction and management units.Because the file management of linear water conservancy project has the characteristics such as long period,more kinds,large quantity and variability,higher requirements are put forward to the file management of water conservancy project.Taking the Yellow River-to-Baiyangdian Water Transfer Project as an example,according to the characteristics of linear water conservancy project and the problems in project file management,this paper discusses on how to do well the file management of large water conservancy projects and puts forward the suggestions. References | Related Articles | Metrics

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Application and Design of Micro-irrigation Water Saving System in Development of Modern Agriculture ZHOU Yan-rong 2018, 28(3): 49-53.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.010 Abstract ( )   PDF (444KB) ( )   The surface water is lack in Hebei Province and the deep groundwater is overtaken seriously.So it is necessary to develop the micro-irrigation technology in Hebei Province.Taking the micro spray irrigation technology applied in 30edible mushroom sheds in Yangzhuang,Zhaowang Town,Dongguang County as the typical case,this paper discusses the planning and design method of micro-irrigation.After the implementation of the micro-irrigation system,the production and living conditions of the area are improved,the exploitation quantity of underground water is reduced,and the social benefit is significant and considerable. References | Related Articles | Metrics

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Effects of Nitrogen Amount of Wheat-maize Rotation System in Salinized Soil around Bohai Sea on Nitrogen Utilization Ratio LIU Quan-feng, ZHAI Yu-zhu, LAI De-qiang, SUN Yi, WANG Ji-gui, SUN Wen-yuan, WU Ting 2018, 28(3): 54-59.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.011 Abstract ( )   PDF (490KB) ( )   A field experiment was conducted to study the optimum nitrogen application of wheat-maize in the high,medium and low yield fields of salinized soil around Bohai Sea,as well as the effects of different nitrogen level on wheat-maize yield,nitrogen contribution rate and nitrogen utilization ratio.The results show that the suitable amount of nitrogen applied for high,medium and low yield fields of wheat is 225kg/hm2,225kg/hm2 and 180kg/hm2 respectively,and 225kg/hm2,180kg/hm2 and 135kg/hm2 of maize.The nitrogen contribution rate in the low and medium yield fields is larger than that in the high yield fields.The nitrogen absorption and untilization rate in the low yield fields is higher than that in the medium yield fields,and the rate in the medium yield fields is higher than that in the high yield fields.The nitrogen absorption and utilization rate and nitrogen partial productivity are decreased with the increase of nitrogen amount.The soil nitrogen supplying capacity in the high,medium and low yield fields of wheat is 82.2%,77.8%and 76.8%,that in maize fields is 81.9%,77.7%and 75.9%,respectively. References | Related Articles | Metrics

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Study on Correlation Degree of Network Users Based on Short Text Information CHENG Xiao-hui, LI Run-yuan 2018, 28(3): 60-63.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.012 Abstract ( )   PDF (210KB) ( )   A calculating method for judging the correlation degree between social network users is put forward in this paper.The method starts from the user’s background information,internet short text information and social information,respectively calculates their correlation degree,finally calculates the correlation degree of network users with the weighted sum.A good result has been achieved through the data experiment of 12 430people captured on the network. References | Related Articles | Metrics

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Design and Production of Express Truck Carriage of Layered Adjustable Space HAO Qiao-hong, LI Guo-qin, YUE Hong-xin 2018, 28(3): 64-67.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.013 Abstract ( )   PDF (1877KB) ( )   This design is to modify the cargo space to make it layered and adjustable,to keep the current couriers away from turning the whole cargo space up and down with all the cargoes of different shapes and sizes piled up at the same cargo space.According to the size or weight of the package,it is reasonable to divide the cargo space into three spaces,the upper,the middle and the lower space.The bottom surface of upper space is adopted with guide rail structure and the bottom surface of the middle space is adopted with parallelogram structure,both of which can be moved in parallel translation.The middle space and the lower space can be also adjusted according to the size of the package with usage of the electric telescopic rod.It is able to make the express simpler and more efficient with easier placing and picking,enlarge the load capacity,ensure the good condition of the items during loading and unloading in the express.The structure design is simple and reasonable,and the material of the parts is very common with low cost and easy market popularization. References | Related Articles | Metrics

Management Science Research

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Countermeasures and Suggestions about the Regulation of Government Public Service under PPP Mode——Taking Mongolia Autonomous Prefecture of Bayinguoleng as an Example CHENG Jun-shuai, KANG Lu-yue 2018, 28(3): 68-71.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.014 Abstract ( )   PDF (165KB) ( )   Taking the government purchase service of Mongolia Autonomous Prefecture of Bayinguoleng(Ba Prefecture for short)as an example,we combine with the research at home and abroad,analyse the problems in government purchase service of Ba Prefecture,such as incomplete policy,lack of government credit,uneven distribution of risk(through analysis of game theory).So we propose to establish a realistic mode including government,public,market(private capital)and independent supervision.Then through the ways of making legal regulation,establishing supervision system and cultivating talents,we provide the countermeasures and suggestions on PPP mode to improve the government purchase service,which has certain guiding significance and use value. References | Related Articles | Metrics

Education and Teaching Research

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Discussion on Transformation and Upgrading of Scientific Innovation Factors in Newly-established Universities 2018, 28(3): 72-75.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.015 Abstract ( )   PDF (150KB) ( )   References | Related Articles | Metrics

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Experimental Study on Improving Students' Application Ability in Professional Theory Course Teaching 2018, 28(3): 76-79.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.016 Abstract ( )   PDF (149KB) ( )   References | Related Articles | Metrics

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Exploration and Practice of Project Teaching of Core Courses in Major of Electronic Information Science and Technology 2018, 28(3): 80-82.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.017 Abstract ( )   PDF (123KB) ( )   References | Related Articles | Metrics

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Analysis on Integration of Micro Lecture and Traditional Class in Vocational English Teaching 2018, 28(3): 83-84.  DOI: 10.16046/j.cnki.issn2096-5680.2018.03.018 Abstract ( )   PDF (93KB) ( )   References | Related Articles | Metrics