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The completion of 12. 5 m deep water navigation channel in the lower reaches of the Yangtze River has an important impact on the development of port cities from Nanjing to Shanghai. In this research, we put the port system and the urban system into a holistic analysis system framework, the sustainable efficiency of nine port cities below the Nanjing on the Yangtze River is calculated by using the two stage SBM-DEA Model. The results showed that the sustainable efficiency of different port cities was all increased from 2011 to 2019. In terms of spatial distribution, the sustainable efficiency fluctuates in some regions, and the oceanic port was higher than the inland ports. And the industrial structure and foreign trade volume have a significant positive impact on the sustainable efficiency of the port cities, but economic level, population density and the number of talents have a negative correlation with sustainable efficiency of port cities. The comprehensive research on Port Geography and Urban Geography would enrich the understanding about the port-city interaction, and hopes that could contribute to the future researches on the port city sustainable development. [ABSTRACT FROM AUTHOR]

As the gateway of China's opening to the outside world, port forms a gateway-city system with hierarchical and functional division through interaction with carrier cities. Based on the port data of 2001 and 2018, this paper measures the gateway function changes of port cities by transforming the urban flow model, so as to reveal the evolution characteristics and laws of China 's gateway system since the 21st century. The research shows that: (1) Since the start of new century, the external service level of gateway-city has significantly improved, the external service function and value of passenger transport and freight have increased by 4 and 8 times compared with those in 2001. But the external service value of freight is less than that of passen‐ ger transport. Although passenger transport and freight are gradually decreasing in the whole country, the decline of freight in East China has been steeper than the other three regions. There are also significant regional and urban differences in external passenger and freight services in different transport sectors. (2) China's gateway-city property indexes have formed a regional evolution pattern of eastern leading, central and western strengthening and northeast weakening. Using the Dagum Gini coefficient method found that the regional spatial gap of gateway proper‐ ty has been reduced, and the main source for the spatial differentiation of gateway function in China is the disparity among regions. (3) All gateway cities can be divided into four grades: na‐ tional gateway cities, regional gateway cities, provincial gateway cities and local gateway cities, the hierarchical structure of China gateway-city shows a stable 'pyramid' shape. [ABSTRACT FROM AUTHOR]

The port hinterland system is an important force to support regional economic development and spatial structure reshaping, as well as the key to realize the transformation of industrial structure and the optimal allocation of resources. Firstly, based on port hinterland evolution theory and ecological theory, according to the new characteristics, the "Big Tree Theory" of the port hinterland system is proposed from the concept definition, evolution mode, evolution mechanism, etc. This study divides the evolution process of the port-hinterland life spatial structure into 4 stages: port-hinterland tree trunk growth, port-hinterland tree root growth, port-hinterland tree crown growth and the whole tree-shaped life spatial structure in the port-hinterland. Meanwhile, we analyze and describe the evolution mode of port-hinterland in each of the various stages. Secondly, this study builds a system that reveals the dynamic mechanism of the whole tree-shaped life spatial structure in the port-hinterland from the port-hinterland spatial system, the port-hinterland economy system, and the port-hinterland transportation system. Finally, this paper takes Dalian as an empirical case to verify the "Big Tree Theory" of the port hinterland. [ABSTRACT FROM AUTHOR]

Port and city, as two centers of activities with different characteristics, were originally two relatively independent transportation systems. The expansion of city scale and the development of port space has led to the evolution of integrated development of the port and the city from their initial separation and led to mixed transportation organization of passenger and freight. Based on the evolution law of the port-city relationship, a cluster analysis was made on the freight big data and the spatiotemporal distribution law of freight vehicles in the port was obtained, and an optimization strategy for port road collection and distribution was proposed from four aspects: network construction, strong axis, efficiency enhancement, and file upgrading. It aims to scientifically and effectively support the port road collection and distribution organization, and has been practically applied in the Zhujiaqiao Port Area of Wuhu Port. [ABSTRACT FROM AUTHOR]

The proposal of a national strategy for the "New Western Land Sea Corridor" will affect the reconstruction of the overall freight distribution pattern in western China. As the most important hub node for cargo distribution and transshipment in inland areas, the inland port (or dry port) is of great significance to regional economic development, logistics systems, and the construction of a new regional development pattern. Therefore, 111 papers on inland port research in international core journals have been selected in this study to systematically review the research status of inland ports and put forward the key directions and development trends for future research to serve the theoretical research and construction planning practice of inland ports in China, and globally. In this study, the literature metrology method is adopted to divide inland port research and development into three stages: the first stage is the initial stage (before 2005); the second stage is the slow fluctuating growth stage (2006-2017); the third stage is the rapid increase stage (2018-present). Scholars are interested in inland port research mainly from mainland China, the Netherlands, Hong Kong, the United Kingdom, the United States, and other countries (regions). Related research topics on inland ports are mostly combined with transportation, logistics, and other fields, which indicates that inland ports have become an important part of transportation systems and supply chain transportation networks. Among specific related research topics, the concept of inland ports is an important research topic, mainly focusing on the differences in naming and function, facilities of inland ports under different geographical backgrounds, and additional functions extended with economic development; however, its concept has not yet been unified. Research on the spatial layout system of inland ports shows that the inland port site selection and layout can be roughly summed up as a supply chain-oriented pattern, and industrial cluster-oriented pattern; the former often near port cargo distribution of traffic nodes, while the latter is on the border between the end of the supply chain. The location and layout of inland ports are influenced by economic foundation, transportation infrastructure, and local policy factors. Inland ports have a profound impact on the region. In terms of spatial effects, they have an impact on urban spatial planning and land use; in terms of economic effects, they can promote regional economic development and employment; in terms of environmental effects, they can reduce energy consumption and emissions, and promote the realization of regional sustainable development. In the operation and control of inland ports, special attention should be paid to the relationship between port planning and each manager, as well as to the management system, to realize the efficient, sustainable, and healthy development of inland ports. Finally, based on the new trends of global inland port logistics research and the realistic demand of China, we put forward several suggestions for future research, including the redefinition of dry ports, spatial layout and planning of inland ports, their regional influence, the port-city relationship, risk of investment, and potential benefits of inland ports.

Based on the two main types of automatic mooring systems represented by cabled mooring and non-cabled mooring, this paper describes the relevant achievements in the research and application of automatic mooring operations of ships in ports both at home and abroad. From the perspective of "smart, safe and green" development trend of ports, this paper expounds on the good application prospect and development significance of automatic mooring systems at ports. Based on the task requirements, research difficulties and key technical problems of safe mooring, the paper presents the development trend of integrated research modeling of automatic mooring systems, intelligent controlling, full mooring process and industrialization of mooring of ships at ports. [ABSTRACT FROM AUTHOR]

分析上海市港口口岸疫情联防联控市、区、企业三级检查（督查）机制，从主体责任落实、港区出入、港区防疫设施、港区人员管控、集中居住点管理、消毒管理等角度介绍一级检查的重点和主要内容，梳理检查过程中发现的问题，讨论三级检查（督查）机制的优点。 [ABSTRACT FROM AUTHOR]

根据上海市港口口岸疫情联防联控工作小组公开发布的港口口岸疫情防控相关政策文件及对相关港口的调研结果, 分析和讨论上海市港口口岸新型冠状病毒肺炎联防联控体系建设和阶段性工作成效, 探讨跨多部门协作在港口口岸应对突发公共卫生事件中的作用。上海市港口口岸疫情联防联控工作小组借助专题协调机制、信息报送机制、专家调研机制和三级检查（督查）机制, 通过规范港口作业流程、封闭管理高风险岗位人员、严格管控国际船舶和人员及规范处置国际船舶污染物等防控手段, 初步摸索形成了一套以“闭环管理”为中心的港口防疫制度, 成功做到了将机制平台化, 团结各有关部门共同在不降低疫情防控要求的前提下, 最大可能地减少防疫政策对于行业经济和人员的影响, 实现科学精准防控的目标, 为港口口岸应对突发公共卫生事件及多部门联防联控提供了有价值的经验和策略。 [ABSTRACT FROM AUTHOR]

The proposal of a national strategy for the "New Western Land Sea Corridor" will affect the reconstruction of the overall freight distribution pattern in western China. As the most important hub node for cargo distribution and transshipment in inland areas, the inland port (or dry port) is of great significance to regional economic development, logistics systems, and the construction of a new regional development pattern. Therefore, 111 papers on inland port research in international core journals have been selected in this study to systematically review the research status of inland ports and put forward the key directions and development trends for future research to serve the theoretical research and construction planning practice of inland ports in China, and globally. In this study, the literature metrology method is adopted to divide inland port research and development into three stages: the first stage is the initial stage (before 2005); the second stage is the slow fluctuating growth stage (2006-2017); the third stage is the rapid increase stage (2018-present). Scholars are interested in inland port research mainly from mainland China, the Netherlands, Hong Kong, the United Kingdom, the United States, and other countries (regions). Related research topics on inland ports are mostly combined with transportation, logistics, and other fields, which indicates that inland ports have become an important part of transportation systems and supply chain transportation networks. Among specific related research topics, the concept of inland ports is an important research topic, mainly focusing on the differences in naming and function, facilities of inland ports under different geographical backgrounds, and additional functions extended with economic development; however, its concept has not yet been unified. Research on the spatial layout system of inland ports shows that the inland port site selection and layout can be roughly summed up as a supply chain-oriented pattern, and industrial cluster-oriented pattern; the former often near port cargo distribution of traffic nodes, while the latter is on the border between the end of the supply chain. The location and layout of inland ports are influenced by economic foundation, transportation infrastructure, and local policy factors. Inland ports have a profound impact on the region. In terms of spatial effects, they have an impact on urban spatial planning and land use; in terms of economic effects, they can promote regional economic development and employment; in terms of environmental effects, they can reduce energy consumption and emissions, and promote the realization of regional sustainable development. In the operation and control of inland ports, special attention should be paid to the relationship between port planning and each manager, as well as to the management system, to realize the efficient, sustainable, and healthy development of inland ports. Finally, based on the new trends of global inland port logistics research and the realistic demand of China, we put forward several suggestions for future research, including the redefinition of dry ports, spatial layout and planning of inland ports, their regional influence, the port-city relationship, risk of investment, and potential benefits of inland ports. [ABSTRACT FROM AUTHOR]

Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to advance the night voyage (ship entering & leaving port at night) of China's ports in a safe and orderly way, the background and significance of carrying out night voyage in ports were introduced. Based on the case study of the terminal, the improvement range of port and terminal utilization rate by liberalization of night voyage was studied; based on accident statistics, the risk differences between day and night voyage were studied. It is concluded that China's ports have the favorable conditions for further liberating night voyage. On this basis, the principle of scientific demonstration, strict control, adjust measures to local conditions, accurate measure, gradually promote were put forward, which can be used as a reference for related departments and enterprises in China to promote the work of port night voyage. [ABSTRACT FROM AUTHOR]

Copyright of Guangdong Architecture Civil Engineering is the property of Guangdong Architecture Civil Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental Science & Technology (10036504) is the property of Editorial Board of Environmental Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The core idea of SDN（software defined networking）is that the control plane and data plane are separated,which makes the network traffic can be flexible controlled.Since SDN has these characteristics,the traffic monitoring and control in SDN have significant differences with traditional IP networks.A network traffic monitoring and control system based on sFlow technology was presented.With the application of sFlow,the process of data collection was separated from the control plane of SDN.The experimental environment was constructed based on OpenDaylight controller and Mininet,and the abnormal traffic was simulated by DoS（denial of service）attacks.The experiments show that the proposed network traffic monitoring and control system can effectively intercept the abnormal traffic.

Port coal conveying bell conveyor in the conveying process of coal, the metal impurities in the coal easily lead to tear the whole belt, and may damage the next level of the devices, which brings huge economic losses for company. In order to avoid the lose cause by the metal impurity, we installed iron remover above the belt for removing metal impurities, but it will increase the cost of production and consumption. According to the function of the iron remover, using the metal detection, signal processing technology, basing on keeping the original precision, realizing the cleaning of metal impurities and greatly reducing the consumption of electricity. This controlling system ensures the safety of production and prolongs the life of the device, it will saving 60% energy or more, and playing an important role in the energy—saving technology of related devices. [ABSTRACT FROM AUTHOR]

Relying on the repair and reinforcement engineering of a habor in Jiaojiang District of Taizhou, we collected the crack monitoring data of reinforced wharf, and according to the meteorological data within wharf area, we monitored and analyzed the change of wharf cracks. The least squares support vector machine algorithm has high trained efficiency, strong learning ability and robustness in nonlinear problem. On the basis of study on its theory, it was adopted to build the crack monitor models of this port, which could be used to monitor and analyze the status of cracks. The results show that the method has high precision, which can be used for safety monitoring of the wharf cracks. [ABSTRACT FROM AUTHOR]

River-ocean combined transportation is an important part of waterway -waterway transit, with reducing transportation costs and easing the pressure of highway transportation and other advantages, is the development direction of domestic and international waterway transportation. Shanghai Hengsha shoal is located in the junction between "Golden Coast” and "Golden Waterway", and it is a perfect place to expand its new development space to achieve the river -ocean direct transfer for Shanghai Port. Based on the domestic and international cases, we analyzed the characteristics of different port layout modes for river -ocean combined transportation, given the suggestions of the layout of river -ocean direct transfer port, and studied the general layout of the new Hengsha deepwater port in Shanghai. [ABSTRACT FROM AUTHOR]

Based on the comprehensive development of the emission inventory of air pollution sources, the emission inventory of self-owned mobile sources of Tianjin coastal ports was researched and formulated. In this study, a gridded emission inventory with a resolution of 3 km×3 km was established for six types of air pollutants from road and non-road mobile sources. The spatial and temporal distribution characteristics of pollutant emissions were analyzed, and the uncertainty of the inventory was analyzed using the Monte Carlo method. The results showed that in 2020, the self-owned mobile sources of coastal ports emitted 148.22 t PM 10 , 135.34 t PM 2.5 , 1061.04 t SO 2 , 4027.16 t NO x , 756.60 t CO, and 237.07 t VOCs, of which the total emissions of road and non-road mobile sources accounted for 6.66% and 93.34% of the mobile source emissions, respectively. The main contributors to motor vehicle pollutant emissions from road mobile sources in the whole port area were small, medium, and large passenger vehicles (gasoline) and heavy trucks (diesel). The main contributors to the pollutants emitted by non-road mobile sources were ships and construction machinery. Uncertainty analysis results showed that the overall uncertainty of mobile sources ranged from -13.3% to 16.53%.

Starting from the construction of Yunchi Port area and Ziyun Railway construction planning, we researched on the mutual influence between port and Ziyun Railway by the construction plan for crossing the Yunchi Port area. The impact of Ziyun Railway and the port is analyzed qualitatively and quantitatively by using the method of the calculation of the port capacity, the assessment of the assets of the port and the economic evaluation. It is found that the Ziyun Railway construction has an impact on the production operation of the port area during the construction period, and has a negative impact on the capacity of the port, the operational safety, the port assets, the resources and the financial benefits of the port after completion of the project. The construction plan could do more harm than good. [ABSTRACT FROM AUTHOR]

For the specific characteristics of scrap steel, we proposed the way for enhancing the ship-unloading and yard operating efficiency of scrap steel at the port. Based on the convenient condition of collection and distribution at the port, we suggested constructing a supporting scrap steel processing and distribution center at the port to develop the scrap steel processing, and then to further promoting the efficiency of scrap steel transportation and operation. The port enterprise can make a win-win situation with steel enterprise. [ABSTRACT FROM AUTHOR]

Based on the research about the present situation of port and waterway construction industry information management system, combined with the business characteristics, we analyzed the requirements of port and waterway construction enterprises for the big data network cloud computing in business management and business development, put forward the construction principle of big data cloud network cloud computing application platform for port and waterway construction enterprises, discussed the application imagine of the era of big data cloud network cloud computing. [ABSTRACT FROM AUTHOR]