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Nonlinear Drift of the Spring Gravimeter Caused by Air Pressure from the Kunming GS15 Gravimeters 昆明GS15型重力仪气压对弹簧重力仪非线性漂移的影响
IF 2 3区 工程技术
Polish Maritime Research Pub Date : 2016-10-01 DOI: 10.1515/pomr-2016-0063
Jin Wei, W. Shen, Hui Li, Li Ziwei
{"title":"Nonlinear Drift of the Spring Gravimeter Caused by Air Pressure from the Kunming GS15 Gravimeters","authors":"Jin Wei, W. Shen, Hui Li, Li Ziwei","doi":"10.1515/pomr-2016-0063","DOIUrl":"https://doi.org/10.1515/pomr-2016-0063","url":null,"abstract":"Abstract In order to monitor and correct the meteorological factors of the spring gravity meter, the characteristics of the time varying gravity changes caused by meteorological factors were analyzed. Kunming GS15 gravity meter from 2007 continuous gravity observation has been carried out with the sampling rate of the pressure observation. In this study, we first compare the effects of 4 types of gravity meter and 3 different types of stations on the gravity observed seasonal gravity signals. It is indicated that the observed seasonal gravity signal of the cave is only 1/10, and there is a constant temperature and constant pressure device. Compared with the same time, the gravity signal of the gravity signal is about 100 times smaller. The influence of the pressure load of the gravity meter is tested by using the theory of pressure. The results show that only the actual value of 2cpd - 3cpd pressure load varies from -0.395 to -0.280×10-8ms-2 , and the 1cpd to 1 cpm periodic partial type gravity meter is also in accordance with the law of gravity and air pressure. And with the characteristics of time lag. In this paper, the nonlinear zero drift parameters of the linear regression model with time lag and the time series of the GS15 gravity meter are used to simulate the nonlinear zero drift parameters of the gravity meter. The results show that the gravity signal contains time lag 35 hours, and the air pressure admittance is 0.8 × 10-8ms-2/mbar. The correlation can reach 79%. The gravity changes signal and satellite gravity as well as the gravity water load signal of the land water model are the same as the gravity water load signal in the autumn as the minimum value, and the seasonal variation of the maximum value of gravity in summer.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/pomr-2016-0063","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67391744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis and Application of Mechanical System Reliability Model Based on Copula Function 基于Copula函数的机械系统可靠性模型分析与应用
IF 2 3区 工程技术
Polish Maritime Research Pub Date : 2016-10-01 DOI: 10.1515/pomr-2016-0064
Hai An, H. Yin, F. He
{"title":"Analysis and Application of Mechanical System Reliability Model Based on Copula Function","authors":"Hai An, H. Yin, F. He","doi":"10.1515/pomr-2016-0064","DOIUrl":"https://doi.org/10.1515/pomr-2016-0064","url":null,"abstract":"Abstract There is complicated correlations in mechanical system. By using the advantages of copula function to solve the related issues, this paper proposes the mechanical system reliability model based on copula function. And makes a detailed research for the serial and parallel mechanical system model and gets their reliability function respectively. Finally, the application research is carried out for serial mechanical system reliability model to prove its validity by example. Using Copula theory to make mechanical system reliability modeling and its expectation, studying the distribution of the random variables (marginal distribution) of the mechanical product’ life and associated structure of variables separately, can reduce the difficulty of multivariate probabilistic modeling and analysis to make the modeling and analysis process more clearly.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/pomr-2016-0064","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67391786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Spatial Economics Model Predicting Transport Volume 预测运输量的空间经济学模型
IF 2 3区 工程技术
Polish Maritime Research Pub Date : 2016-10-01 DOI: 10.1515/pomr-2016-0044
B. Lu
{"title":"Spatial Economics Model Predicting Transport Volume","authors":"B. Lu","doi":"10.1515/pomr-2016-0044","DOIUrl":"https://doi.org/10.1515/pomr-2016-0044","url":null,"abstract":"Abstract It is extremely important to predict the logistics requirements in a scientific and rational way. However, in recent years, the improvement effect on the prediction method is not very significant and the traditional statistical prediction method has the defects of low precision and poor interpretation of the prediction model, which cannot only guarantee the generalization ability of the prediction model theoretically, but also cannot explain the models effectively. Therefore, in combination with the theories of the spatial economics, industrial economics, and neo-classical economics, taking city of Zhuanghe as the research object, the study identifies the leading industry that can produce a large number of cargoes, and further predicts the static logistics generation of the Zhuanghe and hinterlands. By integrating various factors that can affect the regional logistics requirements, this study established a logistics requirements potential model from the aspect of spatial economic principles, and expanded the way of logistics requirements prediction from the single statistical principles to an new area of special and regional economics.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/pomr-2016-0044","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67390840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Coupling Mechanism and Coupling Degree Measurement Model of Shipbuilding Industry Cluster 船舶产业集群耦合机理与耦合度测度模型
IF 2 3区 工程技术
Polish Maritime Research Pub Date : 2016-10-01 DOI: 10.1515/pomr-2016-0049
Yi Su, Fayin Wang, Xiaoyu An
{"title":"Coupling Mechanism and Coupling Degree Measurement Model of Shipbuilding Industry Cluster","authors":"Yi Su, Fayin Wang, Xiaoyu An","doi":"10.1515/pomr-2016-0049","DOIUrl":"https://doi.org/10.1515/pomr-2016-0049","url":null,"abstract":"Abstract This article was aimed to analyse the working condition of the coupling mechanism in Chinese shipbuilding industry cluster. Literature review was conducted to unveil the coupling mechanism of shipbuilding industry cluster, providing analysis of the present development of shipbuilding industry. A theoretical model was proposed by using the efficacy function and the capacity of the coupling coefficient while measuring the coupling of the shipbuilding industry cluster. Four coupling characteristics were found including relevant, systemic, diversity, and collaborative in the shipbuilding industry cluster. The shipbuilding industry cluster has two levels of coupling mechanism including the core layer coupling mechanism and the support layer coupling mechanism respectively. The improvement through coupling the core layer, support layer, and the coupling between two levels, is an effective way to achieve long-term stable development in Chinese shipbuilding industry cluster.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/pomr-2016-0049","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67390957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Numerical Analysis on the Influence of the Twisted Blade on the Aerodynamic Performance of Turbine 扭曲叶片对涡轮气动性能影响的数值分析
IF 2 3区 工程技术
Polish Maritime Research Pub Date : 2016-10-01 DOI: 10.1515/pomr-2016-0050
Jianguo Jin, Zhanzhou Wang, Li-hua Cao
{"title":"Numerical Analysis on the Influence of the Twisted Blade on the Aerodynamic Performance of Turbine","authors":"Jianguo Jin, Zhanzhou Wang, Li-hua Cao","doi":"10.1515/pomr-2016-0050","DOIUrl":"https://doi.org/10.1515/pomr-2016-0050","url":null,"abstract":"Abstract With the gradual increase of the thermal power unit capacity, the inlet steam parameters and flow of the turbine also increase gradually, which causes considerable secondary flow loss. Therefore, studying the causes and distribution of secondary flow loss within the level is of great significance to effectively improve the stage internal efficiency of turbine. Take high-pressure stage moving blade of a turbine as the research object, and adopt the k-ωSST model, the SIMPLEC algorithm to numerically simulate the formation and development process of leakage vortex between the tip clearance of the positive bending twisted blade and its effect on the secondary flow of cascade passage. Results show that relative to the conventional twisted blade, the scope of influence of leakage vortex which the steam flow formed near the suction surface of positive bending twisted blade and the disturbance to passage mainstream become smaller, and the increase of tip clearance has weakened the „C“ type pressure gradient of suction surface of the positive bending twisted blade, increased the thickness of the boundary layer at both ends of blades and the loss of the blade end.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/pomr-2016-0050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67391079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Ground Liquefaction and Deformation Analysis of Breakwater Structures Under Earthquakes 地震作用下防波堤结构的地基液化与变形分析
IF 2 3区 工程技术
Polish Maritime Research Pub Date : 2016-10-01 DOI: 10.1515/pomr-2016-0054
Jie Zhao, Yumei Wang, Gaojie Yun, M. Ashraf
{"title":"Ground Liquefaction and Deformation Analysis of Breakwater Structures Under Earthquakes","authors":"Jie Zhao, Yumei Wang, Gaojie Yun, M. Ashraf","doi":"10.1515/pomr-2016-0054","DOIUrl":"https://doi.org/10.1515/pomr-2016-0054","url":null,"abstract":"Abstract Ground liquefaction and deformation is one of the important causes that damage engineering structures. Chinese current code for seismic design of breakwater is based on the single-level seismic design method as well as code for port and water-way engineering. However, this code can not exactly reflect the seismic performance of breakwater structures which experience different seismic intensities. In this paper, the author used a finite difference software, namely, FLAC3D, to analyze the state and compute seismic responses of breakwater structure. The breakwater foundation’s pore pressure ratio and displacement due to different earthquake have been studied. And the result show that: Smaller earthquakes have little influence on serviceability of the foundation, and severe earthquakes can liquefy some parts of the foundation; In the latter case , obvious changes of pores and foundation displaces can be found. Particularly, when seismic peak acceleration reachs 0.2g, Liquefaction appears in the foundation and mainly concentrated in the upper right side of the structure. In addition, the survey of ultra-hole pressure and displacement values of sand layers of the breakwater, manifests when the ultra pore pressure near 1.0, displacement and overturning structure is relatively large, resulting in varying degrees of damage to the structure. This paper’s research can provide theoretical and designable reference for similar engineering structures","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/pomr-2016-0054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67391416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Storage Allocation in Automated Container Terminals: the Upper Level 自动化集装箱码头的仓储分配:上层
IF 2 3区 工程技术
Polish Maritime Research Pub Date : 2016-10-01 DOI: 10.1515/pomr-2016-0061
Xia Mengjue, Z. Ning, M. Wei-jian
{"title":"Storage Allocation in Automated Container Terminals: the Upper Level","authors":"Xia Mengjue, Z. Ning, M. Wei-jian","doi":"10.1515/pomr-2016-0061","DOIUrl":"https://doi.org/10.1515/pomr-2016-0061","url":null,"abstract":"Abstract Nowadays automation is a trend of container terminals all over the world. Although not applied in current automated container terminals, storage allocation is indispensable in conventional container terminals, and promising for automated container terminals in future. This paper seeks into the storage allocation problem in automated container terminals and proposed a two level structure for the problem. A mixed integer programming model is built for the upper level, and a modified Particle Swarm Optimization (PSO) algorithm is applied to solve the model. The applicable conditions of the model is investigated by numerical experiments, so as the performance of the algorithm in different problem scales. It is left to future research the lower level of the problem and the potential benefit of storage allocation to automated container terminals.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/pomr-2016-0061","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67391906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Vertical Distribution of Nearshore Flow Velocity 近岸流速垂直分布
IF 2 3区 工程技术
Polish Maritime Research Pub Date : 2016-10-01 DOI: 10.1515/POMR-2016-0053
Chunhui Li, Xiao Fu, Ruijie Li, Lu Dai, Peng Chen
{"title":"Vertical Distribution of Nearshore Flow Velocity","authors":"Chunhui Li, Xiao Fu, Ruijie Li, Lu Dai, Peng Chen","doi":"10.1515/POMR-2016-0053","DOIUrl":"https://doi.org/10.1515/POMR-2016-0053","url":null,"abstract":"","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/POMR-2016-0053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67391243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simulation and Experimental Study in the Process of Wave Energy Conversion 波浪能量转换过程的模拟与实验研究
IF 2 3区 工程技术
Polish Maritime Research Pub Date : 2016-10-01 DOI: 10.1515/pomr-2016-0056
Wei Zhang, Yanjun Liu
{"title":"Simulation and Experimental Study in the Process of Wave Energy Conversion","authors":"Wei Zhang, Yanjun Liu","doi":"10.1515/pomr-2016-0056","DOIUrl":"https://doi.org/10.1515/pomr-2016-0056","url":null,"abstract":"Abstract This article introduces the operating principle of the wave energy device and makes AMEsim simulated analysis in the influence of the amplitude and period of the wave on the output efficient. By using the result of the simulation to optimize design, the article puts forwards a kind of suitable control technology which based on the disclosed amplitude and period of the wave to control the check valve, invoking the motor in different levels of efficiency. This kind of technology aims to solve the problem which includes low efficiency and high start wave of the wave energy device. The result is verified by the physical experiment, which lays the foundation for the implementation of marine engineering. The established methods of simulation model and analysis results are expected to be useful to designing and manufacturing of wave energy converter.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/pomr-2016-0056","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67391167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Research on Characteristic Parameters and Resistance Chart of Operation and Maintenance Trimaran in the Sea 海上三体船运维特性参数及阻力图研究
IF 2 3区 工程技术
Polish Maritime Research Pub Date : 2016-10-01 DOI: 10.1515/pomr-2016-0041
Yue Chen, Lingyu Yang, Yi Xie, Song-song Yu
{"title":"The Research on Characteristic Parameters and Resistance Chart of Operation and Maintenance Trimaran in the Sea","authors":"Yue Chen, Lingyu Yang, Yi Xie, Song-song Yu","doi":"10.1515/pomr-2016-0041","DOIUrl":"https://doi.org/10.1515/pomr-2016-0041","url":null,"abstract":"Abstract The paper determined the volume ratio of the main hull and side hull and their position characteristic parameter of operation and maintenance trimaran. Numerical simulation technology was used to do the analysis and calculation of trimarans which have different volume ratio of the main and side hull, and on this basis, the paper tried different positions of main and side hull, finally got the trimaran with optimum resistance performance and the chart of trimaran resistance estimation, so as to provide a new way in the selection of feature parameter of offshore wind farm maintenance trimaran and its resistance estimation.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/pomr-2016-0041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67390790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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