bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluating Street Quality for Walkability from 3D Models
Authors: Zhu W , Hua Y , Dogan T
Published: August 2019

Street quality is critical to urban sustainability. Well-designed streets encourage walking behaviour and attract public activities, thus advancing the sustainability of a city as a whole. Currently, most quantificational analyses of street quality are based on two dimensional maps, using network algorithms and economic theories to calculate accessibility and land value or to account for a series of elements such as number of trees and number of courtyards in order to audit quality scores. The analysis from three dimensional models and human-centred views is rarely utilized but could offer new possibilities to provide urban planners and designers with analytical feedback on the built environment and design process. This research explores ways to relate physical features with walking behaviour using Reid Ewing’s Urban Design Tool to measure the street quality for walkability. It applies physical metrics from measuring parameters in 3D models based on the human’s perspective and other building metrics from GIS data online to systematically audit street walkability. To validate this method, we take two separate studies. One is a case study to evaluate the street walkability of two districts in NYC from their 3D models and GIS data and to visualize the scores. The result from digital models and real environment are similar which indicates the feasibility of applying this method in urban scale. The other is a pilot study asking a group of students (N = 8) to evaluate street walkability of 3D models, telling them the scores calculated by this method, to explore how the scores influence their evaluations. This study illustrates the possibility to quantify the evaluation of street quality for walkability using Urban Design Tool in 3D models to inform urban designer’s evaluation in street scale during the design process.
High-Performance and Energy Resilient Communities: Disaster prevention through community engagement
Authors: de Roode A F , Martinac I , Kayo G
Published: August 2019

As a part of an integrated approach to formulating a plan and comprehensive program for facing natural disasters, human settlements need to first understand the strengths, weaknesses, opportunities and threats (SWOT) within their own localized communities with respect to such disasters. A starting point is to engage local communities in order to assess their baseline understanding of community capacity and capabilities, and to identify and synergize already established disaster prevention and response programs, systems and initiatives. Maui Island, located in the State of Hawaii within the United States of America, was used as a case study to highlight specific opportunities and constraints that selected communities located on Maui Island face in their decision making for energy resilience. Relevant stakeholder groups and their respective roles in disaster mitigation and response are described. Methods for how best to engage local communities around such topics are described, including community surveys, stakeholder workshops, community working groups, and community forums. Methods for how to assess community capacity and capabilities around disaster resilience are also described, including identifying key stakeholders representing a cross section of the local community and studying community response to past disaster events in order to identify successes, best practices, failures and lessons learned. More specifically, this paper provides a deeper understanding of the opportunities and constraints associated with energy infrastructure on Maui Island when seeking to optimize for energy resilience in the face of natural disasters such as hurricanes, tsunamis, flooding and earthquakes. This baseline inventory of energy resilience for selected Maui communities is assessed at the community level. Further research will then apply an adapted methodology to an analysis at the building cluster or district level. This framework can serve to inform similar communities seeking to enhance their energy resilience through bottom-up community engagement.
Development of Wellness Architecture
Authors: Hirano K , Kimizuka N , Tanaka K
Published: August 2019

By using index of wellness architecture such as WELL Building Standard, Takenaka Corporation had renovated and rebuild some projects to improve comfort and intelligent productivity from 2016. The purpose of this report is to give an overview of efforts and achievement in project we’ve done. In the case of large-scale office building renovation, we aim to obtain Well Building Standard certification. We introduce the efforts in the following evaluation items, consideration for the air environment such as whole building smoking cessation and consideration for the mind such as office layout that green is in sight. In the case of rebuilding dormitory for singles, we aim to create an educational dormitory that considers physical and mental health, safety and security, and the environment. We introduce approaches such as plan to promote communication, setting of sleep specialization room as place for creating the opportunity to know one’s own health condition and sleep rhythm. In the case of medium-sized office buildings, We introduce the office layout for a smart working, such as “Workplace to choose the place according to the activity”, the introduction of the wellness air conditioning system corresponding to the thermal individual comfort and the effect verification about the worker satisfaction
Fault evaluation process in HVAC system for decision making of how to respond to system faults
Authors: Motomura A , Miyata S , Adachi S , Akashi Y , Lim J , Tanaka K , Kuwahara Y
Published: August 2019

One of the effective methods for energy conservation in buildings is to operate the building system with high efficiency and to reduce the waste of power consumption. However, buildings are often considered to contain faults, and a fault is one of the causes of hindering high-efficiency operation. Therefore, in a maintenance plan for building systems, it is necessary process that to detect and diagnose faults. In addition, an operation and maintenance process of building systems using fault detection and diagnosis (FDD) essentially requires evaluating the impacts of faults in order to decide how to respond to faults. However, many studies on FDD have not considered a fault evaluating process. Here we focused on faults in a real heat source system and evaluate the impact of faults and determine the priority to repair faults in order to develop an appropriate maintenance plan of the system. We developed a detailed simulation model of the system combining automatic control system based on the specifications. Using this simulation, we calculated the system behavior without faults and behaviors with thirty-five faults. We evaluated the yearly impact of the faults using the system coefficient of performance (SCOP) and the peak power as indicators. In addition, using the actual FDD results in previous studies, we also evaluated faults in consideration of the actual daily impacts of them. We found that there were differences in the priority depending on the indicators. we expected that this fault evaluation method helps an operation and maintenance of the system.
Application of the thermal comfort index as a control logic of VRF system and analysis of its performance by field measurement
Authors: Park Sohyun , Kim Joowook , Song Doosam
Published: August 2019

Variable refrigerant flow (VRF) systems are known for their high energy performance and the installation of VRF systems in buildings is increasing. However, most studies have focused on improving the mechanical efficiency of VRF systems and there has been little research on energy efficient control strategies considering the thermal comfort of occupants. In this study, the application of the thermal comfort index as a control logic of VRF system was analyzed by field measurement. Indoor thermal environment and energy consumption characteristics according to control strategies such as set-point temperature and thermal comfort range in VRF system were analyzed. In this paper, the system configuration and the measurement results will be described.
The Evaluation of Air Blowing Method of Variable-Air-Conditioning-System using Coanda Effect by Computational Fluid Dynamics
Authors: Sakakibara H , Akimoto T , Igarashi H , Nakamura S , Kimura M
Published: August 2019

Government of Japan aims to achieve net zero energy buildings on average regarding newly constructed buildings by 2030. Therefore, we studied the ductless air conditioning system using Coanda effect which is one of the technologies to realize net zero energy buildings. By reducing duct space on the ceiling, it can reduce fan power and save resources. However, when the amount of blowing air volume is small, there is the possibility the conditioned air is not diffuse into the room. Also, when the blowing air volume is large, the draft airflow possibly occurs. Hence, the distribution of the airflow in the room was confirmed by computational fluid dynamics. 15 cases were analysed at the thermal load of 30%, 50% and 100%. The default case was set as the blowing temperature difference of 10 Kelvin and the blowing wind speed of 3.0 meters per second. Then, Air Diffusion Performance Index was calculated from Effective Draft Temperature. As a result, the thermal comfort was generally good when the thermal load was 100%. However, there were some cases that the thermal comfort was low by the draft and hot spaces. It was comfortable in most cases when the thermal load was 30% and 50%.
Architecture and sustainability: the role of environmental rating systems - case study in Brazil
Authors: Santos Salgado Monica
Published: August 2019

The predatory impact of civil construction industry does not seem to occur consciously. It is a process that results from the rapid growth of populations and the necessary response - with the construction of new buildings, the expansion of existing cities and the creation of new ones. In this sense, it seems pertinent to discuss the practices adopted during design and construction process in order to preserve the environment. Throughout the 1990s different environmental rating systems had emerged. UK BREEAM certification has been followed by North American LEED, French HQE and others. However, the careful analysis of the most popular methods indicates that the environmental and economic aspects of sustainability have been valued, leaving social issues in the background. On 2000, Japanese architects have drawn up a chart for environmental architecture which relates environmental, economic and social aspects in an inseparable way. The document reveals aspects that have never been considered by traditional environmental rating systems. In this sense, the purpose of this research is to present a critical analysis of the environmental rating systems adopted in Brazil confronting requirements defined by LEED and AQUA-HQE methods to the sustainable principles proposed by Japanese Architectural Charter for a Global Environment. Results indicate that, in decoupling environmental issues from other aspects of sustainable development, the environmental rating systems have become obsolete and inefficient.
Comparing the occupants’ comfort between perimeter zone and interior zone in Asian office
Authors: Chaloeytoy Kittiwoot , Ichinose Masayuki , Sasaki Rumiko
Published: August 2019

Asian office buildings receive plenty of heat and daylight because of their glazing facades. They also allow the occupants to view outside. These effects depend on the seat position in different distance from the window. A study of building performance regarding those difference effects is required to clarify the occupants’ comfort under contextual conditions. Therefore, this study aims to compare the impact of glazing facades on occupants’ comfort between the occupants in the perimeter zone and interior zone by analyzing the building performance in terms of thermal comfort and visual comfort. Measuring devices were installed to investigate temperature, humidity, and daylight in three office buildings in Thailand and three in Singapore. Simultaneously, occupants’ satisfaction were investigated using questionnaires during working hours. In total, 1,356 samples were surveyed. The questions were fixed for both thermal environment and visual environment in terms of sensation and satisfaction. Furthermore, the opening view and internal blind occlusion rate were noted by visual inspection. The results showed that the thermal environment and visual environment in the perimeter zone were affected by the outdoor environment more than the interior zone. However, most of the occupants were satisfied because they be able to adapt to a wide range of indoor environment conditions. The occupants in the perimeter zone were more satisfied in terms of temperature and view. On the contrary, occupants in the interior zone were more satisfied by the lighting environment. The dissatisfaction survey revealed that the thermal environment has the most influence on occupants’ comfort. However, daylight accessing was revealed to has the highest impact on occupants’ comfort in terms of building-facade effect. The results show that occupants’ comfort levels differed depending on the seat position in the current situation for Asian office buildings. The optimisation of building-facade performance considering its influence on occupants’ comfort is necessary.
Evaluation of lifestyle factors including people’s values affecting electricity consumption in homes
Authors: Otsuka A , Narumi D
Published: August 2019

A critical view holds that people’s values are integral to lifestyle choices. This study investigated the effects of these values, energy-attitudes, and cognition on home electricity consumption through a case study on an all-electric apartment with HEMS in Yokohama. The conceptual framework assumed that “socially oriented values are related to factors that form energy-attitudes leading to a higher level of behavioral intentions and actual behaviors (and vice versa)” according to Schwartz’s basic human value theory and several other sociopsychological models. Results suggest the importance of fostering self-transcendent values in linking people’s behavioral intentions to actual actions. This study was one of the first to include people’s values when considering energy-saving lifestyles in Japan. The fact that people’s values have a certain level of influence on energy consumption has implications on future policy. This sheds light on the need for further research in this area, and thus in realizing energy-saving lifestyles.
A field experiment on green walls taking into consideration wind flow in the hot-humid climate of Indonesia
Authors: Kitagawa H , Tanimoto A , Kubota T , Koyama K , Alfata MNF
Published: August 2019

This paper presents the results of a preliminary experiment using test cells constructed in Bandung, Indonesia. We particularly analysed the thermal effects by comparing green walls with wooden blinds in contrast with those of no covering materials to determine the factors affecting the improvements of indoor thermal conditions in hot-humid climates. The results showed that, unexpectedly, indoor thermal conditions were not improved when green walls/blinds were installed, at least at the center of the units. Nevertheless, air temperatures behind the green walls were found to be lower than those of the other conditions. Moreover, the factors affecting the Standard Effective Temperature (SET*) were analysed in detail by dividing SET* into four thermal factors in terms of temperature, including air temperature, radiation, humidity and wind speed. The further analysis showed that the increases in SET* in the units with green walls were mainly attributed to the reduction of wind velocities (36–45%). It can be concluded that the airflow blockage effect by the green walls was larger than its transpiration cooling effect at the center of the units.
Indoor Air Quality and Its Effects on Health among Urban Residents in Jakarta and Surabaya, Indonesia
Authors: Ariefman Sani Hanief , Surahman Usep , Kubota Tetsu , Hildebrandt Sophia
Published: August 2019

In rapidly growing countries, such as in Indonesia, dramatic increase in new urban houses constructed of modern building materials without sufficient material standards or minimum ventilation rates may cause health problems related with indoor air quality (IAQ). This study investigates the current IAQ and health condition in Kampongs and high-rise apartments in Jakarta and Surabaya, Indonesia. Concentrations of formaldehyde and TVOC were measured, whereas a questionnaire was conducted to collect the data of building attributes, cleaning behaviour, ventilation duration, personal information and health. 707 respondents were interviewed, and 163 rooms were measured from September 2017 to October 2018 in Surabaya and Jakarta. The results showed that overall, the newly constructed apartments recorded higher formaldehyde compared to Kampongs—more than 60% in apartments exceeded the WHO standard of 0.08 ppm. On the other hand, there was little difference in TVOC between Kampongs and apartments and the maximum values reached from 8, 000 up to 21, 800 µg/m
3
. In general, the multiple chemical sensitivity (MCS) of occupants in apartments was twice as high as that in Kampongs. Further, the occupants with higher IAQ measurement results corresponded to the higher MCS risk. The primary results showed a high possibility of IAQ-related health problems in both Kampongs and newly constructed apartments in Indonesia although the main causes were probably different between them.
Typologies of Rapid Urbanization in Developing Asian Countries: A Study of Shanghai’s Rapid Urbanization and Subsequent Strategies
Authors: Boynton Tobey Michael , Chang Soowon , Brent Binder Robert , Yamagata Yoshiki
Published: August 2019

Over the last several decades developing countries, especially in Asia, have undergone large scale rapid urbanization, impacting their developmental patterns. Compounded with increased economic prosperity and social mobility attracting individuals and companies, to urban centres, has led to severe administrative challenges that can negatively affect the citizens, nation, and environment. In efforts to mitigate those adverse side effects cities have instituted, or citizens naturally adopted, a variety of strategies to address those issues. These strategies result in the typologies of rapid urbanization that are most prevalent in developing Asian cities. By focusing on Asian and Chinese cities, using shanghai as a test case, this research proposes several major typological categories associated with rapidly urbanizing areas. Shanghai’s rapid urbanization has been shaped by seven main typologies of urban growth and expansion, since the implementation of China’s economic growth policies and its resurgence as an influential global city. Spatial typological patterns of urban growth in Shanghai are analyzed to explain how the economic prosperity and social mobility have been managed. Typological adaptations learned from the historical urban expansion provide the subsequent strategies for future sustainable development in a rapidly urbanizing area.
Research on Water Treatment of Kongmu-Lake based on Micro Vortex Flocculation Technology with the combination of vortex reactor
Authors: Dai Hongling , Cao Zan , Hu Fengping , Huang Bixia , Wang Yi , Luo Wendong
Published: August 2019

Aiming to solve the problems of greater blindness and randomness in selecting design and operating parameters of micro vortex clarifier, this experiment used the Kongmu-Lake water as the research object to investigate the effects of flocculation time and coagulant dosage on flocs performance and flocculation efficiency under different working conditions, and the best parameter of vortex reactor dosage ratio and operational limits of the micro-vortex flocculation tank are optimized. The raw water flows through the type of HJTM-2 vortex reactor firstly, and the ratio of flocculation time that water flow through the type of HJTM-2 and HJTM-1 vortex reactor is 1:2. Under the best optimal working condition, the best coagulant dosage is 22mg/L and the flocculation time is 14.3min. At this time, the removal rate of turbidity, CODMn, UV254 reached 96.81%, 64.12%, 55.56%, respectively. The maximum floc equivalent diameter is 1.39mm, and the fractal dimension is 1.73.
Dynamically tunable broadband terahertz modulation based on monolayer graphene metamaterials
Authors: Huang Zehua , Wang Jun , Han Qi
Published: August 2019

Dynamically tunable cut wire and split ring resonators (SRRs) based on monolayer graphene metamaterials are presented in terahertz regime. As the Fermi level of the graphene pattern increasing, the resonance frequency presents blue shift and higher intensity. Two resonant peaks that can be modulated dynamically in the range of 2.4-3.4THz and 4.1-5.8THz appear. The monolayer graphene metamaterials realize dynamically broadband terahertz modulation with a minimum modulation depth 63.9% at 2.74THz, and the highest modulation depth 93.3% at 3.4THz.
Experimental Study on Sedimentation Characteristics of Foundation Piles under Super-Large Tonnage Static Load Test
Authors: Yang Zhuo
Published: August 2019

Based on the combination of theoretical analysis and site test, regard-ing to sedimentation problem of super-large tonnage static load test, this paper studies pile sedimentation, lateral friction resistance of pile, pile tip resistance, rel-ative displacement of pile and other physical and mechanical changes characteris-tics. The results show that the Q-s curve of the pile shows a slow change charac-teristic, and the rebound rate of the test pile is 29.26%. The sedimentation curve of the pile gradually changes from the elastic phase to the plastic stage with the increase of the load. With the increase of the applied load at the tip of the pile, the variation curve’ slope of the axial force of the pile shaft gradually decreases, and the lateral friction resistance of the shallow soil show trends of gradually de-crease compared with deep soil, while the relative displacement of pile top and bottom is gradually increasing. The resistance and displacement of pile tip also show a significant proportional relationship. The lateral friction resistance of silty clay has a greater effect on the pile shaft. With the further increase of the depth, the axial force of the pile shaft is obviously decreasing, the decay speed is faster, the pile tip resistance is gradually increased, showing a distinct feature of the fric-tion pile. In this paper, the calculation and analysis procedure of large diameter bored pile is proposed. The nonlinear sedimentation problem of the pile and the surrounding medium is simulated by nonlinear treatment module of the finite element method in the software. The prediction results are basically the same as those of the on-site monitoring results, and the overall prediction accuracy reach-es 88.79%.
Design of an Intelligent Bridge Structure Health Monitoring System
Authors: Ji Xuan , Hu Hesong , Yang Zhuo , Huang Xiaodan , Tan Lingsheng
Published: August 2019

This paper designs an intelligent bridge structure health monitoring system (BSHMS) based on ZigBee wireless sensor network. Based on 3G wireless transmission technology and ZigBee technology, it serves as a wireless monitoring platform with amulti-level network architecture composed of data acquisition node, centre node(gateway) and remote server. In this paper, system hardware circuit and software system redesigned, CC2530is applied in the Contiki operating system. Then, various modules of the entire system are tested and debugged online. The test shows that the system can run stably and capture various data accurately before transmitting it to the rear server, thus meeting the design requirements.
Analysis of Water Supply and Demand based on Logistic Model
Authors: Ren Cuiping , Dong Yinli , Xue Pan , Xu Wei
Published: August 2019

With the development of economy and the increasing growth rate of population, people’s increasing demand for water resources and the unreasonable exploitation and usage of water resource, water scarcity exists in many countries and regions. Accordingly, the research on how to solve the water scarcity is of great value. Firstly, considering the dynamic influence of time on water resource supply and demand and the two factors including the degree of water resource exploitation and per capita availability of water, the water resource supply and demand model is built to measure the capacity of the region to offer clean water. This paper selected the lower per capita water use in north China as the object. This water scarcity in this area is severe due to its large population, less natural water distribution, large proportion of agriculture and low usage of industrial and agricultural water. Secondly, building up the Logistic model and grey prediction model to predict the following 15 years’ population situation and the total water resource supply in north China. Use the intervention plan which combined waste water recycling and water transfer project to intervene water resources. Lastly, combined with intervention plan and introducing validity coefficients to improve the supply and demand model of water resources, it can be estimated that by the year of 2020, water scarcity in the certain area will be alleviated.
Discussion on the concept and definition of mine water
Authors: Zhang Nan , He Hongmou , Guo Xinwei , Han Jinxu , Li Haobing
Published: August 2019

The definition of mine water related concepts involves 6 relevant standards in 6 sectors, 2 mandatory standards, 3 recommended standards, and 1 industry standard. Multi-sectors are inconsistent in the concept and definition of statistical caliber, and the concept of policy is confusing during the formulation and implementation of relevant policy documents, resulting in large errors in statistical data. This paper is based on the analysis of the concept of mine water and the integration of doubts. In conjunction with the relevant requirements of the “Guiding Opinions of the Ministry of Water Resources on the Unconventional Water Sources incorporated into the Unified Allocation of Water Resources”, Conceptual definition of regular mine water quantity, mine water availability, mine water development and utilization, and mine water development and utilization potential, unify the statistical caliber of each department and minimize the difference in statistical data. It is conducive to water resources investigation and management, which are conducive to the integration of unconventional water resources into water resources, alleviating the contradiction between water supply and demand, and improving regional water resource allocation efficiency and utilization efficiency.
Analysis of safety early warning technology for the myanmar-china oil and gas pipeline (myanmar section)
Authors: Zhao Mengqing , Luo Ling
Published: August 2019

On the basis of engineering data of Myanmar-China oil and gas pipeline (Myanmar section), combined with years of pipeline operation experience, According to the characteristics of safety early warning technology at home and abroad, In this paper, a distributed optical fiber early warning system is proposed as an early warning technology for the third party damage of the pipeline and In Myanmar, UAV monitoring and early warning is proposed as a technical scheme for pipeline geological hazards and large and medium-sized crossing projects.
Application of high pressure water in pipeline cleaning
Authors: Zhu Ying , Meng Zhaoxing , Lv Haiqiang
Published: August 2019

The high-pressure water jet cleaning technology is used in the construction of ship cleaning project. The results show that the high-pressure water jet cleaning technology can effectively eliminate pipeline fouling blockage. After cleaning, there is no residual marine organism or other fouling on the surface of pipeline, and there are no surface defects such as thinning of pipeline wall, scratches and pits caused by cleaning. The high-pressure water cleaning technology is an effective way to clean seawater pipeline.
Research on the Correction of Line-Shaped Structural Buildings
Authors: Ma Qingwen , Wei Xufeng
Published: August 2019

Based on several unpredictable reasons, buildings will have varying degrees of tilt damage. As for Line-Shaped buildings structure, since its own structure has a large aspect ratio, it is more prone to appear the tilt damage than other types of buildings. However, some already existed building correction methods are not suitable for line-shaped buildings. So the present study proposes and analyzes the correction method which is more effective to deal with the tilt damage of Line-Shaped buildings structure. Regarded the ancient the Screen Wall as an example, firstly the study analyzes the reasons of damage, and then puts up with corresponding methods. It can devote an available method for such projects for reference.
Accurate Calculation of Antenna Radiation of Elastic-borne Phased Array Radar based on Mutual Coupling
Authors: Wang Di , Wang Xuemei , He Min , Zhang Jinchang
Published: August 2019

In order to solve the current difficulty of radiation calculation of current missile phased array radar arrays, the elemental radiation pattern of small arrays is used to calculate the unit radiation field in a similar environment in large arrays by the element active pattern equivalent method, and then the superposition theorem is used. Calculating the total radiation field of the large array avoids matrix operations in the calculation process and reduces the amount of calculation. And the linear array is extended to the missile-mounted phased array radar antenna array. The radiation pattern of a certain type of missile-loaded phased array radar antenna array considering mutual coupling is calculated. The obtained radiation pattern is in good agreement with the far field test results. The comparison with the far field experiment shows the effectiveness of the method.
Structural Characteristics in Western Liaodong Bay Depression
Authors: Hu Xiangyu
Published: August 2019

Liaodong Bay Depression is affected by both extensional and strike-slip processes. Its structural deformation is complex. Various structural styles are developed. Liaoxi Area located in the western part of the Liaodong Bay Depression. This paper classifies and sorts out the structural styles and summarizes the development characteristics of the structural styles in Liaoxi Area.
Study on adjustment technology of infilled horizontal wells in low abundance Putaohua reservoir of Daqing Changyuan peripheral oilfield
Authors: Miao Guofeng
Published: August 2019

With the deepening of infilling adjustment in Daqing Changyuan peripheral oilfields, some low permeability and low abundance Putaohua reservoir blocks have low oil production and poor economic benefits. Therefore, exploring the adjustment technology of infilled horizontal wells has certain guiding significance for the joint development of vertical wells and horizontal wells in unused blocks.
Mine Water Inrush Prediction based on Virtual Large Diameter Well Method
Authors: Shi Chen
Published: August 2019

How to predict the mine water inrush is an important and complicated work. The virtual large diameter well method was widely used in mine water inrush prediction. This paper attempts to use the virtual large diameter well method to predict the amount of water inrush in the test area of the Taran Gale coal mine’s first mine working face, and finally determine the amount of water in the mine.
Pumping Test to Determine Hydrogeological Parameters of Coal Seam Roof Aquifer
Authors: Shi Chen
Published: August 2019

The coal seam roof aquifer often enters the mine as a water-filled source during coal mining. In this paper, the hydrogeological parameters of the aquifer in the Taran Gale coal mine were determined by various methods, which provides a basis for the prevention of mine water damage and the design of coal mine drainage system.
Analysis of Land Use Change Based on Landsat 8
Authors: Yang Yanzhen
Published: August 2019

Remote sensing image classification technology is applied to land use classification, which can quickly obtain land use information. Based on Landsat8 OLI image data of Jinan City in May 2017 and May 2018 and the latest vector map of Jinan in 2018, the paper analyzes the situation of land use change in Jinan City, draws the quantitative results of the change, and draws some conclusions. It provides certain decision support for scientific use, rational and sustainable development of land use in Jinan.
Design and Simulation Analysis of Cold Energy Utilization System of LNG Floating Storage Regasification Unit
Authors: Zhang Gang , Li Boyang , Zhang Xiaorong , Wang Qingguo
Published: August 2019

This paper aims at the problem of cold energy utilization of LNG floating storage regasification unit (FSRU). A comprehensive LNG-FSRU cold energy utilization scheme was proposed based on ship-shore sharing. Using energy cascade theory and energy conservation theory to design a cold energy cascade utilization system that includes air separation, dry ice making, horizontal two-stage Rankine cycle power generation, seawater desalination, ship refrigerated storage, air conditioning and ice making. Using Aspen HYSYS to carry out system simulation calculation and parameter optimization to determine the optimal program and operating parameters. Establishing the mathematical model of the cold exergy utilization system to analysis cold energy efficiency by using the Peng-Robinson equation calculation method. The analysis results show that the using efficiency of cold exergy reaches 29.57% which proves that the cold utilization system of the floating LNG storage regasification plant is reliability with large economic value.
Network Security System and Implementation Scheme of Information Infrastructure in Geological Prospecting Industry
Authors: Huang Feihu , Huang Wei
Published: August 2019

This paper analyzed the construction requirements of the network security of information infrastructure in the geological prospecting industry, and proposed a network security system of information infrastructure for the geological prospecting industry, including physical security, network communication security, computing environment security, regional border security and security management. With the weak infrastructure of the industry units and the lack of operation management system, the overall solution for the network security construction of information infrastructure for the geological prospecting industry was proposed. Based on the constructed information security system and the overall solution, a typical network security implementation scheme of information infrastructure for the geological prospecting industry units is proposed.
Comparative Analysis and Research of Different Ways to Deal with the Soft Soil Foundation
Authors: Chen Jia , Chen Wei , Zhang Ke , Yu Jing
Published: August 2019

Taking an engineering example as background, the deformation and settlement of CFG pile and artificial bored pile composite foundation under the same geological condition are analyzed by using finite difference method. The simulation results show: the same formation and pile material and compaction process, the large diameter and deep manual bored pile foundation can significantly restrain the foundation drop, the analysis results have certain reference value for similar projects.
Study on Dynamic Mechanical Properties of Limestone Under Impact Loading
Authors: Shan Renliang , Song Yongwei , Zhang Haochen , Wang Mengnan , Hao Xiaolin
Published: August 2019

In order to study the variation of the mechanical properties of limestone under the condition of impact load, the dynamic mechanical properties of limestone under different strain rate and cyclic impact conditions were studied. The results show that the uniaxial compressive strength of limestone is 93.76MPa and the acoustic velocity is 5122m·s-1, and under the condition of single impact load, the peak stress and strain rate are positively correlated. The peak strain increases with the increase of strain rate, and the larger the strain rate, the more serious the fragmentation of limestone. Under the condition of cyclic impact load, the cumulative damage of limestone increases gradually, and the more impact times, the faster the increase speed.
Research on Characteristics and Sustainable Development of Mineral Resources in China
Authors: Zhang Yu , Wang Zimeng
Published: August 2019

China is rich in total mineral resources, but per capita possession of less, more poor ore, mineral resources supply is prominent, and there are problems such as resource waste and environmental pollution; Therefore, in order to achieve sustainable development of mineral resources, it is necessary to strengthen exploration, realize stable allocation of resources, increase strategic reserves, and improve the level of comprehensive utilization of mineral resources, so as to achieve sustainable and healthy development of mineral resources and bring benefits to future generations. On the basis of enumerating the characteristics of China’s mineral resources, this paper analyzes the factors restricting the sustainable development of mineral resources, and puts forward measures to realize the sustainable development of mineral resources by strengthening the legal system and promoting management.
Study on Permeability Characteristics of Granites with Different Degrees of Weathering
Authors: Chen Lingqiang , Hu Wenyi , Zhu Liubing , Feng Yong , Min Youwei , Liu Lingfeng
Published: August 2019

In Guangzhou Metro line 21 tunnel construction process, weathered granite shows diversification in strength, deformation characteristics and permeability characteristics. The rock mass permeability coefficient is the core parameter necessary in the construction, and the definition of its value directly affects the accuracy of the calculation in design of tunnel anti-drainage structure and the negative effect evaluation of groundwater environment. With on-site and indoor tests, theoretical calculations, microstructure observations and mineral analysis, the permeability characteristics of granites in different degrees of weathering is studied. The variation of the final permeability characteristics is described. The permeability of granite does not increase unidirectionally as the degree of weathering deepens.
Wax Inhibitor Screening by Differential Scanning Calorimeter for High Wax Content Crude Oil
Authors: Zhang Zhifang , Gao Wenwen , Yun Bo , Lu Xiao , Chen Shijun , Gu Xuefan
Published: August 2019

In order to investigate the wax inhibition performance of various inhibitors different scanning calorimetric (DSC), a powerful and quickly technique having no request of sample pretreatment, has been used for investigation the thermal characteristics of the wax remover. According to the parameters such as wax appearance temperature (WAT), content of wax and rheology, it is found that the best wax removing rate can be reached to 457mg/L•h under 40°C with 150mg/L surfactant combination (fatty alcohol polyoxyethylene ether + calcium petroleum sulfonate + mixed alcohol).
Evaluating the similarity rules applied to model experiment of large-scale tuna purse seine
Authors: Zhou Cheng , Xu Liuxiong , Tang Hao , Wan Rong , Zang Yingliang , Liu Lili
Published: August 2019

This study primarily evaluated the effects of different small-scales on the model criteria in theory and proved the feasibility of introducing prototype netting and Tauti’s law to construct the large-scale purse seine model net. It was concluded that difference of scale of twine diameter/mesh size will not affect the model law. An experiment of testing with the gear model based on the Tauti’s law and sea trial of full-scale fishing gear were executed. Due to the restriction of Tauti’s law applied to purse seine gear model test, this study modified the model criteria by introducing the shooting speed into the scale to form segmented conversion law. In the shooting process, shooting speed is the main factor determining the sinking depth and speed of the gear. After shooting, gravity and drag are the main factors controlling gear submergence in this case where Tauti’s law was able to keep the similarity. The comparison of sinking depth and speed between prototype net and model net indicated that the corrected conversion law could accurately and practically applied to tuna purse seine model test.
Study on the Reduction Treatment of ink Sludge in Flexo Printing
Authors: Gong Yun , Gu Ping , Yu Zhonghua , Tian Quanhui
Published: August 2019

The paper studied about the characteristics of ink sludge of flexo printing and analyzed the possibility different reduction treatment and disposal. Industrial analysis and elemental analysis to confirm the elemental content, TGA and DTG were used to analyze the weight loss and heat absorption and desorption behavior of dry sludge at different temperature. GC-MS and XRF analysis was applied to analysis the composition and content of the compounds. Three kinds treatment for for ink sludge based on different needs.
The impact of the environment on bird migration
Authors: Peng Weifeng
Published: August 2019

Migration is the basic survival skill of birds. It is of great significance to study the migratory behavior of birds. This paper mainly studies the relationship between bird migration and self-energy consumption through the energy expenditures model in flight, and provides simple migration for birds.
Perceived preference of soundscape in a Bamboo Park based on the laws of psychophysics
Authors: Hong Xinchen , Wu Shuting , Jiang Yu , Lan Siren
Published: August 2019

The purpose of this study was to explore the relationship between the physical and the psychological quantity of soundscape preference in the bamboo park. Through semantic difference method, the preference of different soundscape elements in the bamboo park was evaluated, and the physical index in the observation sites was measured at the same time. Finally, after the subjective and objective data fitted by the law of psychophysics, a model for evaluating the soundscape preference in the bamboo park was established. The results show that the trend of subjective and objective data fitting for each soundscape element conforms to the law of psychophysics. Among them, geophony and biophony tend to Fechner’s Law and anthorphony to Stevens’ Power Law.
Study on Diesel Engine Characteristics under Large Transient EGR
Authors: Cui Huasheng , Zhao Zhenfeng , Geng Zhao , Liu Yuhang
Published: August 2019

Modern diesel engines tend to employ up to 50-70% exhaust gas recirculation (EGR) together with high intake pressure and injection strategies to enable low temperature combustion (LTC) cycles for reducing NOx and soot emissions simultaneously. Obviously, the combustion conditions and exhaust emissions are sensitive at such high EGR rate. And any slight fluctuation in the EGR quantity will bring unintended deviations from the desired engine performance, thus LTC mode is only limited at partial engine operation points. So the engine has to switch combustion mode frequently between compression ignition (CI) and LTC region within a few engine cycles in real application, which may result in combustion cyclic variations and even misfire, especially during transient operation. In order to investigate effect of heavy EGR transient process on engine combustion cycles, the experimental work was carried out on a four-cylinder VM common-rail turbocharged diesel engine. The results show that the oxygen concentration in the intake charge almost maintains at steady level at EGR steady conditions, while the exhaust oxygen concentration is affected by exhaust values opening/exhaust values closing (EVO/EVC), and result in intra-cycle fluctuation, which will approximately bring 2% calculation error bandwidth for EGR ratio. From 37% to 55% EGR ratio, the EGR gas is mainly driven by the pressure ratio of intake and exhaust duct, and it will experience a long accumulating process to reach a new equilibrium. And the inordinate delayed injection timing will promote in-cylinder cycle-to-cycle variation and even misfire, especially during transition from CI to LTC region.
Scouring Effect of Pavement Runoff in Initial Stage
Authors: Zheng Chaocheng
Published: August 2019

The rainfall runoff events from July 2017 to August 2018 were sampled and tested by artificial equal time interval sampling method. The pollution emission characteristics and initial scouring effects of SS, COD, dissolved COD, heavy metals such as Cu, Pb, Zn, Cr, Ni, Cd and dissolved heavy metals in the runoff process were studied.
Environmental Impact Analysis of the Whole Life Cycle of Pure Electric Vehicles
Authors: Xiao Peng , Wen Qinghong
Published: August 2019

Based on the method of life cycle assessment, this paper makes a comprehensive analysis of the environmental impact of pure electric vehicles in the three most important stages of automobile manufacturing, automobile use and vehicle scrap recovery. The environmental problems caused by pure electric vehicle and traditional fuel vehicle represented by Santara are compared. The results show that the total energy consumption of the pure electric vehicle is 60.8% of that of the fuel vehicle in the whole life cycle, and the energy consumption of the traditional fuel vehicle is 58.6% of that of the pure electric vehicle in the automobile manufacturing stage, but the emission of pollutants is higher. In the use stage of the vehicle, the energy consumption of the pure electric vehicle is that of the fuel vehicle. The energy consumption of pure electric vehicles is 52.2% of that of fuel vehicles, and the emissions of pollutants are still lower than those of fuel vehicles. Generally speaking, the energy consumption and pollutant emission of pure electric vehicles in the whole life cycle are lower than those of traditional fuel vehicles. Therefore, under the national policy of sustainable development, the state should vigorously advocate and subsidize the development of pure electric vehicles.
Analysis on the Influence of Indoor Air Pollution on Human Health and Prevention Measures
Authors: Wang Xiaoxiao
Published: August 2019

Indoor air pollution has become another murderer endangering human health, so indoor pollution control has become an urgent need to be solved. This paper mainly analyzes the sources and hazards of pollutants, the means of prevention and control of pollutants, and offers countermeasures and suggestions. It aims to let people know the source of indoor pollutants and realize the harm of indoor air pollution. According to pollutants and their concentrations, Take appropriate control measures to avoid or reduce the harm of pollutants to the human body.
Analysis of NO emission characteristics of low-order blended fuels
Authors: Luo Xiaoyu , Fang Yuan , Qiao Lei , Tang Zhengming , Xiong Teng , Tian Lirong , Sun Haijun
Published: August 2019

Two kinds of typical coal (HSQ bituminous coal and LY anthracite coal) were selected as the object of research, and in the fixed bed reactor a series of research was carried to make a thorough inquiry on NO emission characteristics of coal combustion under different blending modes. The results of coal blended combustion show that: Improving the ratio of bituminous coal can advance the ignition and burnout, and improve the combustion performance of coal. When two kinds of coal burn blended, NO emission is between the concentration of these two kinds of single coal, and the NO conversion rate increases gradually with the growth of the proportion of anthracite; the interrelationship between these two kinds of coal has influence on NO emission, which is showed as form of inhibition or promotion when ratio of mixed coal is changed.