bluuebunny/crossref_metadata_2025 huggingface dataset:
Transnational Power Grid Interconnection Potential Evaluation Model and Empirical Research
Authors: Liu Lin , Zhang Ning , Jian Yongfang
Published: October 2019

The paper sets up the two-tier screening evaluation model of potential of transnational grid interconnection that includes the mutual complementation potential model and environmental evaluation model. This two-tier screening evaluation model introduces quantitative index and applies it to the full coverage analysis and calculation of the countries along the “Belt and Road”. The combination of qualitative and quantitative analysis forms a complete evaluation system from interconnection potential calculation to electricity investment environment. The empirical analysis demonstrates the effectiveness of two-tier screening evaluation model where the analysis result may serve as the scientific reference of promoting grid interconnection of the countries along the “Belt and Road”.
Research on Equipment State Management Mode Based on “League System”
Authors: Bing Hankun , Zhao Yuzhu , Wu Zhengfeng , Ma Guangyao
Published: October 2019

Under the background of the decline in the hours of operation of thermal power generation equipment, based on Internet technology, a new mode of equipment state management, which integrates equipment responsibility to personnel, continuous tracking and updating of equipment status, and integration of test analysis and processing, A new idea of equipment maintenance for technology sharing, data sharing, and experience sharing has been realized. It has realized the orientation control of the daily work of the professional technicians of power generation enterprises, and at the same time, the equipment status tracking based on the equipment status is further exploration for the field of state maintenance.
Numerical Simulation and Analysis of the Arrangement of Wind Direction Meter for Wind Turbine
Authors: Xue Zhipeng , Fu Jie , Zhao Minmin
Published: October 2019

This paper performs CFD numerical analysis on the wind direction variation characteristics of the upper part of the platform under the running condition of the whole machine, and analyses whether the current location of the equipment is suitable for placing the wind direction measuring equipment and finding a better position in the area. The vicinity of the reference point is the area where the airflow is relatively intense, and the wind direction is complex and changeable. In-depth CFD research on this flow phenomenon can obtain an intuitive wind direction state and inherently subtle changes.
Research on Variable Inertia Coordination Frequency Regulation Strategy Based on a Wind & Thermal Power Combined System
Authors: Sheng Siqing , Li Pengwang , Wu Hao , Zhang Liwei , Fan Maosen
Published: October 2019

With the increasing installed capacity of the wind power, the power system has an obviously low inertia characteristic. It is of great significance to actively promote the virtual inertia frequency regulation technology of wind turbines (WTS) for improving the system frequency quality. The frequency regulation capability and frequency regulation effects of wind & thermal power units were analysed, and a variable inertia coordination frequency regulation strategy for different wind power penetration conditions was proposed in this paper. At the wind farm level, the dynamic frequency regulation participation coefficient of wind farms was fuzzily determined according to the operation conditions of WTS and the wind power penetration ratio. At the wind turbine level, the calculation method of the equivalent inertia constant of WTS was given based on the effective rotational kinetic energy. And the allowable range of frequency regulation parameters of WTS was determined by considering the incremental model of the system. Results indicated that the proposed coordinated frequency regulation strategy not only provided a reliable inertia support, but also maintained the stability of WTS. The frequency response performance of the high-penetration wind power system was improved.
Optimal Planning and Design for Sightseeing Offshore Island Microgrids
Authors: Fei Yunzhi , He Yongxiu , Chen Fenkai , You Peipei , Zhai Hanbing
Published: October 2019

A method of optimizing the design of the sightseeing island micro-gird is described and combined with the actual case, simulation analysis is performed using the HOMOER. The simulation results show that for the sightseeing offshore island with limited natural resources, diesel-renewable-storage mixed micro-grid is more suitable for practical application and is the best choice. In the planning of sightseeing island microgrid, environmental protection requirements and system full standby needs should be taken into account.
Distributed FiberOptic Sensing for Hydraulic-Fracturing Monitoring and Diagnostics
Authors: Li Yiqiang , Liu Junrong
Published: October 2019

Fiber-optic sensing (FOS) are an emerging technology in hydraulic fracture diagnosis. Fiber-optic sensing technologies mainly include distributed temperature sensing (DTS) and distributed sound sensing (DAS). During hydraulic fracturing, the perforation cluster efficiency for cemented plug and perforation (PnP) wells, points of fracture initiation for packer and sleeve (PnS), and fluid channelling between fractured intervals caused by either tubular or annular leaks could be quantitatively evaluated by DTS data. Combined with DAS data, fluid distributions for each fracturing stage along the entire horizontal wellbore could be obtained. The roles of DTS and DAS in different hydraulic fracture stages are comprehensively analyzed in this paper. It provides a guidance for application of FOs in oil industry.
Synthesis Load Forecasting Method Based on Artificial Immune System for Power System
Authors: Dong Nan , Zhu Haojun , Xi Yunhua
Published: October 2019

Electric power load forecasting is not only the sticking point of the safely, operation of whole system, but also the key part of the economical and healthy development of electric power system. The intrinsic single models have shortage, so the synthesis forecasting model making better use of all information will be pursued. It combines those single models property to take full advantage of their information to improve the precision. The most important part of the combination forecasting model is how to confirm the weight. In AIS, antigen and antibody are the parallelism of aim function and doable result. The appetency between antigen and antibody is regarded as the matching degree between feasible result and the objective function. Because of its good property on global searching, it can find the optimal solutions, some synthetic forecasting models based on AIS are set up in this paper, which combine AIS and load forecasting. The attempter average synthetic model and power geometry average synthetical model proposed in this paper, has been applied to a certain area mid-long term load forecasting. It is showed that the synthetic forecasting model based on AIS could provide high forecasting precision.
A Review on Capacity Optimization of Hybrid Renewable Power System with Energy Storage
Authors: Gan Jiatian , Li Jingli , Qi Wannian , Kurban Aynur , He Yi , Guo Su
Published: October 2019

With the rapid development of the global economy, there is a sharp shortage of fossil energy sources. Therefore the development of renewable energy technologies such as wind power and solar power has become a hot issue nowadays. However, due to the randomness, intermittency and instability of renewable energy, it is difficult to provide continuous and stable electricity when it runs independently. Hybrid renewable power systems with energy storage can improve the reliability of power supply. Capacity optimization is the key of hybrid renewable power system design and the basis of optimal scheduling. In this paper, the capacity optimization of hybrid renewable power system with energy storage is summarized and classified. According to the different energy storage modes of the hybrid renewable power systems, the capacity optimization models, optimization methods and the software used are introduced.
Capacity optimization of concentrated solar power-photovoltaicwind power combined generation system
Authors: Pei Huanjin , Guo Su , He Yi , Wang Jiale
Published: October 2019

Due to the fluctuation and randomness of renewable resources, such as solar irradiation resource and wind resource, independent renewable power plants are not easy to generate stable and reliable power. However, multi-energy complementary power generation with energy storage can improve the power quality of renewable energy generation and meet the requirements of grid-connected, so it will be the mainstream of renewable energy generation in the future. Capacity optimization of multi-energy complementary system is the basis and key to improve the power quality and reduce cost of renewable power generation. This paper describes the capacity optimization model of concentrated solar power-photovoltaic-wind (CSP-PV-Wind) combined power generation system. The optimization objectives are as follows: (1) the power is as close to the load as possible; (2) the low overall investment of the combined power supply; (3) the high annual total power generation revenue. The improved particle swarm optimization algorithm is used to optimize the capacity configuration of CSP-PV-Wind combined power generation system, and obtain the optimal dispatch strategy. The results show that, power quality of CSP-PV-Wind combined power generation system is obviously better than that of PV-wind combined power generation system, while Surplus of Power Supply Probability (SPSP) and Loss of Power Supply Probability (LPSP) are all below 15%. However the power generation cost is still a little higher. Therefore, the strategy of reducing the area of collector and increasing the storage tank capacity will be used to decrease the generation cost in the future.
Predict the sales of New-energy Vehicle using linear regression analysis
Authors: Tang Lingxiao , Sun Jia
Published: October 2019

New-energy Vehicle is a new form of vehicle that uses environmental friendly energy and becomes a popularity in recent years. It is important for both the consumers and the producers to search for factors that might affect the sales of New-energy Vehicle. In this study, three linear regression models are examined to determine factors that have significant effect on sales of New-energy Vehicle. ANOVA analysis is conducted to test the model validity and to compare the effect of the three models obtained. Result shows that disposable income, number of charging station, subsidies and literacy level positively affect the sales of New-energy Vehicle.
Application of OpenLayers in marine information monitoring
Authors: He Yuqin , Bi Zhenbo , Tian Haobin , Duan Kai , Wu Jiashuai , Wang Hongwei
Published: October 2019

Marine information monitoring plays an important role in solving marine environment and controlling marine ecology. OpenLayers, as an open source development tool for WebGIS client, has the characteristics of small size and powerful function compared with commercial WebGIS software. This paper discusses the application of OpenLayers in ocean information monitoring based on OpenLayers. Firstly, The paper gives a basic overview of OpenLayers, then summarizes its related research, constructs the system framework for ocean information monitoring system and discusses the related key technologies. Finally, it studies the application of ocean information monitoring. From the research point of view, open source OpenLayers performs well, meets the general needs of marine information monitoring, and can significantly reduce development costs.
Parametric design process basing on building physical performance
Authors: Li Yangluxi , Chen Lei
Published: October 2019

The purpose of this research is to investigate general workflow of parametric architecture design basing on building physical performance. Earlier study on parametric design have shown that this method can effectively improve quality and diversity in terms of architecture appearance. In addition, design time could also be saved in this way. Nevertheless, research about parametric design on building configuration basing on building physical performance is still insufficient. Hence, this study investigates the specific workflow of parametric design in the basis of building performance. The result show that whole workflow can be divided into three steps:1) variables input 2) objective function determination 3) optimization operation. Combination of different component conducts in every step and realize final optimal scheme.
Study on spatial-temporal change of soil organic carbon and impact factors in Gudao Forestry Farm of Dongying
Authors: Zhang Shengnan , Liu Zhanhong , Fang Luo , Wu Baolin , Li Yurui , Ning Yan
Published: October 2019

Soil organic carbon (SOC) is one of the important properties to evaluate soil quality, which can indirectly reflect the effect of afforestation on saline-alkali land. In this study, 4 different forest types in Gudao Forestry Centre were selected as experimental plots, and bare land was set as blank group. Spatial differentiation and impact factors of SOC between different forest types were studied by field investigation and laboratory experiment. The results show that (1) SOC content in the study area is lower than 1%. SOC content in forest land is higher than that in bare land. In the upper soil layer, the SOC content of Robinia Pseudoacacia forest is lower, and mixed forest is higher. SOC content of bare land is higher than that of forest land in the lower layer. (2) SOC has a significant positive correlation with available nutrients (P<0.05), and has a weak correlation with pH and water content. There are different correlations with conductivity and bulk density in different soil layers, and they all showed a negative correlation at the upper layer, and a significant positive correlation at the lower layer (P<0.05).
A Study of Real-Time Forecasting for the Urban Lake-Groundwater Coupled System Using Surrogate Models
Authors: Liu Chuankun , Hu Yue , Yu Ting , Xu Qiang , Liu Chaoqing , An Quan , Shen Chao
Published: October 2019

The real-time forecasting of flooding event and pollution emergency has a significant impact on the robust of urban lake and groundwater coupled system. However, the traditional statistical based prediction method is too rough while numerical based method is very time-consuming. In this study, a framework integrating surface water-groundwater coupled numerical model and surrogate model for real-time forecasting was proposed. The Artificial Neural Network (ANN) algorithm was used to train the surrogate model. The performance of the surrogate model was assessed with the number of training samples and hidden neurons as variates. More training samples would help improve the performance of the surrogate model indicated with R square value getting close to 1. The complex ANN with more hidden neurons performed better than the simple networks in the condition of enough training samples, and complex network without enough supporting training samples would be inferior to the simple network.
Research on image perception of Guilin tourism destination based on network text analysis
Authors: Liang Rongfang , Luo Shengfeng
Published: October 2019

This article taking the travel notes of the ant mafengwo.com and Ctrip.com as a sample, using the content analysis method and ROST CM6 to analyze the visitors’ perception of the Guilin tourism destination image, through the analysis of the high-frequency vocabulary and the semantics of the network notes, and the spindle coding, From eight categories of humanistic attraction, natural attraction, tourism transportation, special food, accommodation conditions, overall impression, tourism consumption and service level, It is found that the tourists’ perception of Guilin tends to be positive. The basic information characteristics, cognitive image, emotional image and willingness to travel are comprehensively explored. The image of Guilin is proposed from the improvement of hardware elements, the innovation of tourism image marketing methods and the improvement of software image elements.
Analysis of Hydrogen Production Potential Based on Resources Situation in China
Authors: Yang Yanmei , Wang Geng , Lin Ling , Zhang Sinan
Published: October 2019

Hydrogen energy is becoming more and more blooming because of its diversified sources, eco-friendly and green, easy storage and transportation, high-efficient utilization, etc. The use of hydrogen as an energy carrier is expected to grow over the next decades. Hydrogen, like electricity, is a secondary energy. Hydrogen production is the foundation for all kinds of applications. Based on the resources situation in China, potential of hydrogen production is analysed. China has a large potential of hydrogen production from coal, which is about 2.438 billion tons. Potential of hydrogen production from natural gas is less than that from coal, which is about 501 million tons. According to the average consumption of methanol per year, potential of hydrogen production from methanol is about 690, 000 tons per year. Potential of hydrogen production from industrial gas (coking, petrochemical and chlor-alkali industries) is about 866, 400 tons per year. Potential of hydrogen production from abandoned renewable energy power is about 1798.2 million tons per year. Distribution of resources in China differs among provinces. The deployment of hydrogen industry should pay attention to local hydrogen production potential. A green hydrogen production method, such as water electrolysis by renewable energy power, is a promising and environmental friendly way.
Analysis and Evaluation of the Urban Rainwater Harvesting System in Green Buildings
Authors: Li Hongmin , Lu Yan
Published: October 2019

In the present study, urbanization provides residents with superior material and cultural living conditions, but also brings series of problems such as environmental pollution and water supply and drainage issues. Urban rainwater utilization is one of the method to solve urban water shortage and reduce waterlogging disaster.Taking an office building in Wuhan as an example, based on the analysis of rainfall characteristics in Wuhan, this thesis demonstrates a rainwater utilization system by rational use of the structural form of buildings, and analyzes and evaluates the function of the system with actual data. It is feasible and necessary to prove its comprehensive benefit according to the input and revenue. And the system is economic and reasonable for the project and the society as a whole. Based on the specific project, the author summarizes experiences and put forward effective suggestions.
Economic and environmental benefits of a novel multi-functional heat pump system for dishwasher
Authors: Dong Wei , Li Yongcun
Published: October 2019

In present study, a novel heat pump named multi-functional heat pump systems for dishwashers is introduced. 45 oC hot water cycle and hot air cycle are provided by the single-stage heat pump cycle to complete the cleaning and drying process. Moreover, the high temperature water at 85 °C is provided by the two-stage heat pump cycle system to achieve the disinfection function, and the 26°C cold air is realized by the single-stage refrigeration cycle for rapid cooling. Thermodynamic analysis of multi-functional heat pump systems for dishwashers under four different operating conditions with R22 / R134a as working fluid was carried out. The results show that COP (coefficient of performance) of the system is above 3.2 under all four conditions, which meets the energy efficiency rating index. Comparing energy efficiency and environmental benefits and operating costs of multi-functional heat pump systems for dishwashers with the traditional electric heating dishwashers, these can be known that primary energy consumption, carbon dioxide emissions and operating cost of multifunctional heat pump dishwasher are 1.24 * 105kJ, 10.55kg and 21.70 Yuan respectively under the condition of per running energy consumption for 40kW·h, above three all lower than the traditional electric heating dishwasher.
Application of Biological Detection Technology in Food Inspection
Authors: Zhang Lihua
Published: October 2019

Food safety issues are related to people’s livelihood issues and are deeply valued by the society. They affect the hearts and minds of hundreds of millions of people. In recent years, food safety issues have been frequent, and government departments, food processing enterprises and private consumer organizations should work together to strengthen and pay attention to food inspection, in order to ensure food supply quality, maintain food safety, and develop healthy lifestyles. Therefore, how to efficiently and accurately detect the harmful substances contained in food has become a key topic in food quality monitoring. As a new technology field in the 21st century, bioassay technology has unique advantages in food safety monitoring. Explain the application of bio-inspection technology in food inspection, in order to providing reference for relevant personnel and promote the rapid development of food testing industry.
Experimental simulation of nitrogen and phosphorus release during marine dumping of dredged sediment
Authors: Liu Wei , Wang Pibo , Zhou Bin , Chen Qingfeng , Ma Junjian , Li Qing , Zhang Jing
Published: October 2019

Marine dumping of dredged sediment results in the release of considerable amounts of nitrogen and phosphorus into the seawater. In this study, we evaluated the release pattern of nitrogen and phosphorus during sediment dumping through experimental simulation under different mixing ratios and temperatures. The concentration of NO3-N, PO4-P, and total phosphorus (TP) in seawater quickly increased in less than 1 h after mixing of sediment and seawater and remained stable thereafter. The concentration of NH4-N increased and peaked at 0.25 h, but quickly decreased thereafter. The concentration of NO3-N, NH4-N, PO4-P, and TP in seawater showed a positive correlation with the mixing ratio. The contribution of NO2-N from sediment to water was negligible and there was no obvious difference in the release amount among different mixing ratios. The release amount of each measured nutrient at 25°C was marginally higher than that at 15°C, suggesting that marine dredging and dumping should be performed in winter rather than in summer. The release amount of NO3-N, NO2-N, NH4-N, PO4-P, and TP in a 5000-m3 vessel reached 26.5, 17.6, 0.28, 1.68, and 1.68 kg, respectively. This study provides a detailed evaluation of nitrogen and phosphorus release pattern in marine sediment dumping process, which will be helpful for the conservation and selection of marine dumping areas.
Study on Optimization of Gas Drainage Methods in High-burst Mines
Authors: Yang Fengfeng , Gao Dongfang , Zhang Jufeng , Zhao Kezhen , Xu Tai , Zheng Chao , Bai Liping
Published: October 2019

After the mechanization upgrade of Yongjing Coal Mine, the original extraction method cannot solve the problem of gas. According to the actual production conditions of the mine, the source and composition ratio of gas emission are analyzed.By combining with the gas extraction method before upgrading and transformation, it is of great importance to determine the appropriate comprehensive gas extraction method and optimize the gas extraction parameters for improving the gas extraction effect and eliminating the risk of gas outburst.
Risk analysis of soil liquefaction in earthquake disasters
Authors: Zhang Yubin
Published: October 2019

China is an earthquake-prone country. With the development of urbanization in China, the effect of population aggregation becomes more and more obvious, and the Casualty Risk of earthquake disasters also increases. Combining with the characteristics of earthquake liquefaction, this paper analyses the disaster situation of soil liquefaction caused by earthquake in Indonesia. The internal influencing factors of soil liquefaction and the external dynamic factors caused by earthquake are summarized, and then the evaluation factors of seismic liquefaction are summarized. The earthquake liquefaction risk is indexed to facilitate trend analysis. The index of earthquake liquefaction risk is more conducive to the disaster trend analysis of soil liquefaction risk areas, which is of great significance for earthquake disaster rescue.
Application of double skin in the ecological architecture design of Thomas Herzog
Authors: Niu Shengnan , Li Yang
Published: October 2019

The purpose of this research is to investigate the use of double skin in Thomas Herzog’s works. Double skin is an important method of green building design, and it is also one of the building energy-saving techniques that Thomas Herzog often uses. This paper discusses some of the common features of Herzog’s application of double skin by summarizing some of Herzog’s works and comparing them with the actual construction of Chinese ecological buildings.
Research on Analysis Method of Shading and Blocking of LFR Field
Authors: Ma Jun , Wang Chenglong , Xia Yangjun
Published: October 2019

Shading and blocking problem is the main element restricting efficiency of a LFR system. The traditional analysis methods often need to build the models by using SolTrace, which results in the low efficiency. According to characteristics of single axis tracking of the LFR field, a plane right-angle coordinate system was established, and coordinate equations of reflectors at any time were deduced. Lengths of shading and blocking were got by tracking sun rays which fell on the reflectors and reflected the receiver passing through the adjacent reflector endpoints at any time. Offset caused by the solar azimuth in the shading and blocking area was got by geometrical optics. And then, the shading and blocking efficiency could be calculated. For the Puerto Errado 1 solar thermal plant, the shading and blocking efficiencies on vernal equinox hardly changed; on summer solstice, they were smaller at sunrise and sunset, and gradually stable and close to the value of spring equinox with the increase of solar altitude angle; they were smaller on winter solstice and the change with time were larger. The results of the calculations were good agreement with the simulation dates of SolTrace, and validity of the method was proved.
Comparison of Hydrogen Specification in National Standards for China
Authors: Yang Yanmei , Wang Geng , Zhang Lan , Zhang Sinan , Lin Ling
Published: October 2019

Hydrogen specifications for different scenarios are various. Based on national standards for China, a comparison of hydrogen specification standards is discussed in this paper, including specification standards for industrial hydrogen, pure hydrogen, high pure hydrogen, ultrapure hydrogen, hydrogen for electronic industry and hydrogen for PEM FCVs. Hydrogen purity for electronic industry is greater than that for industrial hydrogen, pure hydrogen and hydrogen for PEM FCVs. Specifications of general contaminants in hydrogen for electronic industry, including H2O, O2, N2, CO, CO2 and total hydrocarbons, are stricter than that in hydrogen for PEM FCVs. Hydrogen purity for PEM FCVs is less than that for electronic industry and pure hydrogen. However, contaminants in hydrogen for PEM FCVs are strict. Contaminants in hydrogen for PEM FCVs should include not only H2O, O2, N2, CO, CO2, Ar and total hydrocarbons, but also helium, total sulfur compounds, formaldehyde, formic acid, ammonia, halogenated compounds and particulates.
Social Benefit Evaluation of Passive Design of Green Buildings
Authors: Li Shenghan , Liu Lei
Published: October 2019

Passive design of green buildings has three benefits: economy, ecology and society. At present, there is no authoritative definition of social benefits at home and abroad, so it is very difficult to evaluate and measure. Based on Maslow’s hierarchy of needs, economic and sociological theories, 5 first-level indicators and 20 second-level indicators of social benefit evaluation system for passive design of green buildings are obtained. In addition, the structural equation model was built by “AMOS” to analyze and compare these influencing factors. The research results showed that: Among the five latent variables, Environmental Effect is the most significant, followed by Sustainability, Economic Development Potential, Overall Measurement and People Oriented. And there is a significant positive impact between the latent variables. Among the secondary indicators, “Urban environment”, “Enterprise investment environment”, “Ecological environment policy”, “Industrial scale and openness” and “Thermal comfort” are the main influencing indicators. Finally, some suggestions were put forward to provide reference for the evaluation of social benefit of related projects in the future.
Carbon Footprint and Built-up Land Footprint: Taipei Case Study
Authors: Lee Yung-Jaan
Published: October 2019

The purpose of this study is to analyze whether the ecological footprint (EF) of Taipei residents differs between districts. In this study, EFs of residents of 12 districts in Taipei were calculated from the bottom-up approach using 445 questionnaires. The EF consists of six categories, and this study focuses only on the carbon footprint and the footprint of the built-up lands. The personal carbon footprint for Taipei residents is 0.0458 gha. The top five districts with the highest personal daily water footprint are Nangang, Wanhua, Neihu, Beitou and Xinyi. The top five districts with the highest daily carbon footprint are Xinyi, Wanhua, Beitou, Nangang and Shilin. The five districts with the highest daily EF are Xinyi, Wanhua, Beitou, Shilin and Nangang. The socioeconomic background of the respondents does not relate to the size of the water footprint and ecological footprint. Moreover, there is no statistical correlation between the individual’s daily water footprint and daily EF. The socio-economic background of the respondents does not exhibit correlations with the size of the EFs.
Multi-Objective Optimization of Organic Rankine Cycle for Low-Grade Waste Heat Recovery
Authors: Wang Ruijie , Zhao Jingquan , Zhu Lei , Kuang Guohua
Published: October 2019

The organic Rankine cycle (ORC) is considered as one of the most viable technology to recover low-grade waste heat. A multi-objective optimization model is established to simultaneously derive the maximum exergy efficiency and the minimum electricity production cost (EPC) of a specific ORC system by employing the genetic algorithm (GA). Evaporation temperature and condensation temperature are selected as decision variables. At first, variations of exergy efficiency and EPC with evaporation temperature and condensation temperature are investigated respectively using R245fa, R245ca, R600, R600a, R601 and R601a as working fluids. Subsequently, a multi-objective optimization is performed and the Pareto frontiers for various working fluids are obtained. Results indicate that performance of the specific ORC system with R245fa as working fluid is better that with other working fluids.
Development of the portable mass spectrometer and its application in environmental monitoring
Authors: Guo Cuilian , Cheng Yongqiang , Liu Maoke , Zhao Bin , Zhang Shuwei , Zhang Li
Published: October 2019

We reviewed the current key techniques of portable mass spectrometer and discussed its application in environmental monitoring. At present, mass spectrometer has two development directions. One direction is high-throughputs, high-sensitivity and high-resolution laboratory mass spectrometer. The other is small, in-situ monitoring portable mass spectrometer. With the rapid development of electronic technology and new materials, portable mass spectrometers are widely used in environmental pollution monitoring because they have the advantages of small size, light weight and low power consumption.
The Causes Analysis of the Air Preheater and Performance Blocking Evaluation of the Measures on the SCR De-NOxUnit
Authors: Pan Su , Yu Pengfeng , Liu Linbo , Han Jing , Shen Xiao
Published: October 2019

In order to solve the problem of abnormal rise of the differential pressure of the revolving air preheater on 300MW unit, we analysed the causes of abnormal rise of the differential pressure of the air preheater and evaluated performances of control measures, through historical data mining and on-site inspection of the unit. The results show that, with the gradual decrease of environment temperature with the decrease of the exhaust gas temperature, the ashes in flue gas are bound by acid liquid produced by condensation of flue gas, and the adhesion areas of the ammonium bisulfate produced in the denitration process are enlarged. However the original set ash blowing pressure can no longer satisfy the requirements of the air preheater, giving rise to the differential pressure of the air preheater on both sides to rise. The reason of the higher differential pressure of the unilateral air preheater is that the large ammonia injection amount, leading to the increases of ammonia escape of the denitrification system. So the side of the air on preheater ammonium bisulfate type blockage is more serious. After the Measures of Adjusting distribution coefficient of ammonia supply valve on both sides, increasing the dust blowing frequency and pressure of the air preheater, the differential pressure of air preheater on both sides are close to the consistent. The decrease amplitude of the differential pressure of the air preheater on 280MW is about 300-500Pa.
Application Analysis of GPS Positioning Technology and GIS Based on Metamaterial in Forestry Engineering
Authors: Jiang Shuhui , Zong Qin , Deng Xinjie
Published: October 2019

Metamaterial refers to artificial composite materials that exhibit extraordinary physical properties that are not found in natural materials. The extraordinary characteristics of metamaterials are derived from the physical response caused by artificially prepared, special non-uniform intercalated structures. Under the rapid development of society and the continuous advancement and development of science and technology, GIS and GPS GIS technology as spatial information analysis technology has begun to develop rapidly and widely. The frequency response characteristics of metamaterials can be adjusted in a wide range according to their structural parameters, so we can design them to work in the frequency range we need through the basic unit structure parameters of metamaterials. Compared with the existing information management methods, the introduction and application of geographic information system technology can provide strong spatial data processing, analysis, query and maintenance capabilities for afforestation project management, and can provide an effective working platform and modern information technology support for obtaining information and decision analysis in the management process of forestry major ecological engineering projects. Based on metamaterials, starting from the advantages of GIS, this paper focuses on analyzing the specific application of GIS in forestry engineering planning and design, and systematically introduces GIS software application technology. To realize the digitalization and networking of forestry projects so as to play a more active role in improving the modern management level of forestry ecological projects in China through the application and demonstration of high and new technologies.
Mould Contamination Experimental Study in Public Building Environment
Authors: Zhang Xin , Chen Guojie , Ran Xuanhao , Huang Yaqian , Wang Huaihao , Tang Lijiao
Published: October 2019

This paper is aimed at the experimental study on mould contamination status. Mold contamination has seriously threatened residents’ physical and mental health and buildings. However, few experimental studies on mold contamination was made in the built environment under hot and humid climate. We firstly prepared the Sabaurauds agar(SAB) with reference to the national standard and set sampling points by the five-point sampling method in a classroom of USC. Then, we cultured the sample in 28 °C constant temperature condition, counted mould number with plate counting method and referred to the Omeilianski formula to calculate indoor mould concentration. The study found that the average concentration of mould spore in the typical public building was 629cfu/m3, and the exceeding rate was up to 25.8%. The results show that the typical public building environment in Hengyang has serious mould contamination, thus further environmental optimization research is urgently needed.
Between Tourism and Ecology : Review of Political Policy Commitments on Ecotourism Development in Bangka Belitung
Authors: Ibrahim Ibrahim , Zukhri Nizwan , Rendy Rendy
Published: October 2019

Tourism and ecology are two important issues in regional development planning in Bangka Belitung. As an archipelago that has a productive tin mining area, environmental damage is an important issue. Not only because of the impact of damages due to mining, but the dimensions of tourism which are important sectors in this area are also affected. In recent years, local governments in the Bangka Belitung region are focusing on working on the issue of tourism by relying on the ecotourism sector as an important alternative to post-mining. This study explores how political policies are arranged in regional planning documents. The research method used was descriptive qualitative by examining the regional medium-term development planning documents in 6 districts, 1 city, and 1 provincial government in Bangka Belitung. This study found 4 things. First, that none of the regional governments listed the vision of tourism and only 1 region that included an ecological vision. Secondly, the study found that there was only one government that made the issue of tourism in the development mission and only 3 regions mentioned the ecological mission, the rest only mentioned implicitly. Third, each region places tourism and ecological issues as two different programs, not considered an issue that must be managed synergistically. Fourth, almost all regional planning documents mention tourism and ecology as regional strategic issues, but they are not balanced with a strong vision, mission, and work program as a translation. Fifth, only 4 out of 8 regions have made the issue of developing ecotourism a regional strategic issue even though it has not been followed by a strong design development in development planning. In the end, this study concluded that tourism and ecology had not been placed optimally in planning documents politically.
Research On Public Building Energy Consumption Prediction Method Based On NAR Neural Network Prediction Technology
Authors: Li Heng-jie , Qiao Zhen , Chen Wei , Zeng Xian-qiang , Wu Long
Published: October 2019

In order to solve the problem of high energy consumption of public buildings and optimize and improve energy conservation of public buildings, we built a building energy consumption prediction model based on NAR neural network prediction technology improved by BP neural network algorithm, and the energy consumption value is predicted. The large public buildings as the research object, the key factors to determine the effect of building energy consumption and collect the corresponding data processing, as the input parameters of neural network prediction public buildings energy consumption value, according to the actual situation will eventually NAR prediction of neural network and BP network prediction method and the comparative analysis the measured data. The results show that NAR neural network can predict the energy consumption of public buildings more accurately than BP neural network under different building parameters.
Multi-Perspective Influence Mechanism Analysis and Multi-Scenario Prediction of Carbon Emissions——A Case of the Yangtze River Delta, China
Authors: Yi Tao , Qiu Mohan , Zhang Zhengang , Mu Song , Tian Yu
Published: October 2019

Under the mandatory push of meeting carbon emission reduction commitments proposed in the Paris Agreement, the analysis on the peaking time of China’s carbon emissions deserves enough attention. This paper focuses on the peaking times of total carbon emissions (TCE) and carbon emission intensity (CEI) in the Yangtze River Delta (YRD). According to the development of carbon emissions in YRD and related targets in the 13th Five-Year Plan, the peaking times of TCE and CEI in different scenarios are predicted based on the influence mechanism analysis of carbon emissions in YRD from the perspective of energy, economy and society. Considering the development characteristics of China at this stage, this paper introduces several new indicators such as full-time equivalent of research and development (R&D) personnel and investment in environmental pollution control. Based on the study results, several policy recommendations are put forward to fulfil China’s carbon emission reduction commitments.
Evaluate the spatio-temporal changes of vegetation and human activities in China’s Wulingyuan Natural World Heritage Site
Authors: Zhang Ye , Yang Xuejun
Published: October 2019

The Wulingyuan area, in Zhangjiajie, China, is a world natural heritage site famous for quartz sand and rock peak landscape. The assessment of vegetation dynamics and human activities are conducive to protecting the heritage value and to formulating sustainable development plans. Here, we use long-term MODIS data to quantify the spatiotemporal changes of vegetation and the response to environmental variables through three NDVI processing methods. We also analyze human activities and policy changes. The results indicated the following. (i) The vegetation in Wu has been in good condition on average for the past 18 years, with a high vegetation index and high vegetation productivity. (ii) The vegetation in Wu and each subarea shows an overall improvement trend, 71.00% (60.03%, 46.80%), and shows an increase in AM-NDVI (SG-NDVI and STI). Spatially, the vegetation increase area is mainly located in the buffer area, and a very small vegetation decrease area is in the development region. (iii) There are correlations between vegetation and temperature and precipitation, but neither of them passed the significance test. (iv)To comply with the World Heritage Convention, establishing national scenic areas and supplementing woodland protection planning may be the key policies having a positive effect on the vegetation change.
Field-scale performance of microelectrolysis-Fenton oxidation
process combined with biological degradation and coagulative precipitation for landfill leachate treatment
Authors: Zhao Yuan-Yuan , Xu You-Ze , Zhou Shuang , Liu Jiao-Mei , Cheng Yingxiang , Fu Guang-Yi , He Xiao-Song
Published: October 2019

In order to verify the feasibility of Fe/C microelectrolysis-Fenton oxidation for mature landfill leachate treatment in industrial application, this study conducted the treatment processes at full-scale by physicochemical and spectral characterization. The full-scale studies showed that 48.17% of the dissolved organic carbon (DOC) and 42.27% of the dissolved organic nitrogen (DON) were removed by the microelectrolysis-Fenton oxidation process, respectively. Spectra analysis further suggested that the mature leachate was mainly composed of tryptophan-like and fulvic-like compounds. The combination of microelectrolysis and Fenton oxidation efficiently decomposed the aromatic C=C into carboxyl-C and decreased the molecular size of DOC, resulting in a dramatic reduce (97.1%-98.3%) of the fluorescence intensity. The DON removal by microelectrolysis-Fenton oxidation likely associated with the NH2-decomposition of tryptophan-like and aromatic compounds into NO3-N. The tryptophan-like compounds may play a dominant role in Ba binding, while Pb and Cd were likely bound to both the tryptophan-like and fulvic-like compounds. Above 60% of the heavy metals were removed in the microelectrolysis-Fenton oxidation section. Results above confirmed the effectiveness of Fe/C microelectrolysis-Fenton oxidation for mature landfill leachate treatment in industrial application.
Environmental impact analysis of food waste anaerobic digestion and products utilization process
Authors: Wang Tao , Wang Fei , Hu Yangqing
Published: October 2019

Anaerobic digestion technology is a widely used technology for food waste treatment. It can produce clean fuel gas and realize harmless treatment of waste. Different ways of utilizing the digestion products vary depending on the market demand and production technology. In this paper, life cycle assessment (LCA) was conducted to analyse the environmental impacts of different processes in food waste anaerobic digestion treatment and compare different utilization strategies of digestion products especially the digestate. The results of this study indicated that the incineration of digestate had advantages in most environmental impacts except global warming potential (GWP), compared with composting as fertilizers. Besides that, incineration had the lower energy efficiency due to drying heat demand. The high energy conversion efficiency of internal combustion engine contributed much to reducing environmental impacts. It’s worth mentioning that the sufficient combustion performance of micro-turbine resulted in smaller global warming potential (GWP) and eutrophication potential (EP).
Bi-level Planning Model for Integrated Energy Network in Solid Waste Treatment Park
Authors: Li Shuo , Zhang Luqing , Chen Aikang , Zhang Yanchi , Xie Da
Published: October 2019

In this paper, a bi-level planning model was proposed for the integrated energy network in solid waste treatment park to achieve optimal energy planning in the park. Firstly, the factors affecting planning were analyzed from the aspects of energy and environment. Then, the physical architecture of the integrated energy network planning of the solid waste treatment park was proposed, and the typical energy component models of the solid waste treatment park were proposed. This paper took the annual total cost as the first-level target and the annual operating cost as the second-level target, then proposed the bi-level planning model of the integrated energy network. Finally, the advantages of the model were verified by example. The example shows that under the action of the bi-level planning model, the energy, environment and economic benefits of the solid waste treatment park can be significantly improved.
Research progress in recovering phosphorus from wastewater by crystallisation
Authors: Yin Zhichao , Fu Ying , Chen Qingfeng
Published: October 2019

Phosphorus removal by crystallisation has the advantages of fast reactions, high efficiency, and recyclable resources, and it has attracted much attention at globally in recent years. With extensive research, its theory and process technology have been continuously improved. Magnesium ammonium phosphate (MAP) crystallisation and calcium hydroxyphosphate (hydroxyapatite, HAP) crystallisation are two common methods for wastewater dephosphorisation, but there are few reviews of these two methods. In this paper, the research results concerning MAP and HAP crystallisation methods are comprehensively reviewed. The reaction principle, influencing factors, and engineering applications of the two products are summarised, and the two crystallisation methods are compared. Finally, the development of future phosphorus crystallisation technology is discussed. These prospects provide a basis for the promotion and application of phosphorus removal by crystallisation.