bluuebunny/crossref_metadata_2025 huggingface dataset:
The overall seimic performance analysis of the web light-gauge steel joist structure
Authors: Qin Liyun
Published: July 2020

The WEB Light-Gauge Steel has the advantages of superior seismic performance, low cost, efficient construction speed and so on, and can better deal with the emergency under the rapid construction and put into use. In this paper, ABAQUS finite element program is used to analyse the time history of two-story buildings with extremely light steel structure. The displacement time history curve, acceleration time history curve is successively compared with the opening and depth as the reference variables. It is concluded that the depth of the room has a significant effect on the overall seismic stiffness of the structure, and the selection of the length-width ratio of the plane form of the structure should be considered in the seismic analysis.
Analysis and Research on Microseismic Signal Characteristics and Energy Change of Working Face in Liyazhuang Mine
Authors: Lu Zhanjin
Published: July 2020

To provide a certain support for the prediction of the rockburst and setting of the threshold, the SOS microseismic monitoring system is used to remotely, real-time, dynamic and automatic monitoring of the seismic signal of the 2-228 working face of Liyazhuang coal mine. And the original signal of the microseismic is processed by the window Fourier transform, and the characteristics of the microseismic waveform and spectrum of different energy levels are analyzed. The results show that there are different characteristics of waveform and spectrum corresponding to signals at different energy levels. The high amplitude, low and centralized main frequency, long duration of signal, coda waves developing obviously than head wave and slow attenuation are the typical characteristics of strong mine earthquake. With the decrease of mine earthquake energy, the vibration attenuation rate gradually becomes faster, and the duration of the signal being shorter, the development of the head wave being obvious, the amplitude of velocity decreasing correspondingly, but the rate of amplitude decreasing gradually slows down, and the main frequency is gradually spread from concentration to diffusion, while the frequency distribution range is affected rarely. The research results can provide a scientific basis for setting the threshold of shock pressure prediction index and its risk prediction.
Design and field test of drilling composite impactor
Authors: Zhao Jianjun , Cui Xiaojie , Cao Haitao , Yin Huibo
Published: July 2020

When the PDC drill bit encounters the heterogeneous and highly abrasive formation, it comes up with problems such as serious stick-slip phenomenon, shallow depth of penetration and short service life, and meanwhile, the rapid drilling tool with a single impact function cannot meet the drilling acceleration demand of exploration and development in deeper and more complex formation. Therefore, as a complementary implement of the traditional percussion drilling tools, a efficient drilling composite impactor has been designed, which is capable of applying both the reciprocating torsional impact and the reciprocating axial impact. The impact characteristic parameters of the tool have been obtained through the ground performance test, which also verifying the reliability of the composite impact timing, in addition, the field application has been carried out in Tian17-Xie12 well. And the results show that the key drilling parameters, such as well inclination and azimuth, change stably, thus shortening the sliding drilling time, and compared with adjacent wells, the tool above-mentioned has improved the mechanical drilling rate by 38%.
Simulation and Filed Test on Dynamic Formation Mechanism of the Rotary Percussion Drilling Tool
Authors: Ma Mingxin , Tian Zongzheng
Published: July 2020

Rotary percussion drilling tool can effectively improve the drilling speed in the hard formation. However, due to the impact of drilling fluid, the erosion of the dynamic and static valve disc is serious, which can reduce the impact effect. In this paper, the flow field characteristics and erosion characteristics of the dynamic forming mechanism are analyzed by numerical simulation and test, while the dynamic and static valve disc of dynamic formation mechanism is improved, which is verified by field test. The results show that the pressure from the entrance to the surrounding walls is higher and higher. The maximum velocity of drilling fluid is distributed near the edge of the outlet. The study will provides theoretical and technical guidance for increasing tool life and rate of penetration in hard formations.
Research on Working Viscosity and Influencing Factors of Polymer Solution in Seepage Process
Authors: Li Dan , Fei Chunguang , Wang Lihui , Xia Huifen
Published: July 2020

Using seepage experiments and theoretical methods, the pseudo-residual resistance factor is introduced, the working viscosity calculation method is modified, and the influence of the viscosity and injection speed of the polymer solution on the change of working viscosity in porous media with different permeability is studied. The pseudo-residual resistance factor calculation is more reasonable to describe the dynamic change of working viscosity during the displacement process; as the permeability and viscosity of the injection fluid increase, the working viscosity of the polymer in the porous medium increases; as the injection speed increases, the polymer shows Viscoelasticity, working viscosity shows a trend of decreasing first and then increasing.
Main controlling factors and remaining oil distribution in ancient buried hill reservoir
Authors: Liu Yang
Published: July 2020

The paleo buried hill in the study area belongs to the metamorphic rock buried hill reservoir, and the reservoir conditions are controlled by the dual factors of structure and dissolution; the comprehensive structural relative difference, the network fracture network characteristics of the reservoir space and the development scale of the secondary dissolution holes are divided into three types of buried hill reservoir; through the comprehensive study of the reservoir characteristics and the reservoir forming conditions of the buried hill reservoir, the source rock fault transport and the fracture and cave development of the buried hill reservoir The main controlling factors for the formation of buried hill reservoir in the study area are the degree of development and sealing conditions. Based on the comparative analysis of a large number of field data such as drilling, oil testing, logging, logging interpretation, oil-water identification and production performance, the trap characteristics, original oil-water interface, rising speed of oil-water interface and water flooded surface condition of buried hill reservoir are clarified, thus guiding the distribution of remaining oil.
Effects of different alternative soil forming materials on soybean growth index and yield
Authors: Liu Zhe , Wang Huanyuan , Cao Shiliu
Published: July 2020

Aiming at the problems of soil poor and the decrease of cultivated land in the alluvial fan area in the northern slope of the Qinling Mountains, the selection of suitable alternative soil-forming materials to improve the soil in the piedmont area could provide a scientific reference for the improvement of soil quality. Therefore, we chose six different alternative soil-forming materials treatments, including vermiculite (M1), perlite (M2), clay shale (M3), gravel (M4), sand (M5), and soft rock (M6), which mixed with soil at a ratio of 0.5 L·m2 for field soybean planting experiments, respectively. The results showed that the order of soybean plant height from high to low in 6 different alternative soil-forming materials was M2> M6> M3> M5> M4> M1, the chlorophyll value of M2 and M3 was larger than that of the other four treatments, and the range of increase was 20.9%-26.6%, the figures showed M2 treatment was the most suitable for soybean plant growth. For soybean root dry weight, 100-grain weight and yield, the soybean root dry weight, 100-grain weight and yield under M2 and M1 treatment were larger. Comprehensive analysis of crop growth indicators and yield showed that M2 treatment was the most suitable as an alternative soil-forming material for soybean growth and soil improvement in mountainous areas.
Distribution of Polycyclic Aromatic Hydrocarbons in Coal Gangue with Different Metamorphic Degrees
Authors: Chen Dong , Wen Xueqin , Zeng Fangui , Huang Dongmei
Published: July 2020

The contents of 16 US Environmental Protection Agency (EPA) polycyclic aromatic hydrocarbons (PAHs) in coal gangue samples with different metamorphic degrees (R0,max=1.21%, 1.47%, 1.84%, 2.05%, 3.30%) have been measured by high performance liquid chromatography (HPLC), and the characteristic distributions of PAHs in samples are studied. The results suggest that all the contents of high molecular weight polycyclic aromatic hydrocarbons (HPAHs, 4-6ring), low molecular weight polycyclic aromatic hydrocarbons (LPAHs, 2-3ring), total polycyclic aromatic hydrocarbons and the toxicity of PAHs in samples increase first and then decrease as the increase of vitrinite reflectance. The proportion of LPAHs in the ∑16PAHs decreases first and then increases, while HPAHs is opposite. Furthermore, Ant/(Ant+Phe) ranges from 0 to 0.03, Flua/(Flua+Pyr) ranges from 0 to 0.37, BaA/(BaA+Chr) ranges from 0.04 to 0.14, and total index range from 0.64 to 1.66 in samples, all of which could provide a reference for judging the source of PAHs.
Preparation and properties study of graphene-enhanced acid-resistant anticorrosion coating for subsea oil and gas
Authors: Wang Lei , Han Zhongzhi , Shi Jiafeng , Ding Chao , Liang Hao , Zhang Yanjun , Zhang Liping , Guo Xiaojun
Published: July 2020

In order to solve the corrosion problem of the existence of acidic material such as H2S, CO2 in the subsea pipelines, this article studied the coating film forming matter, which is combined with phenolic epoxy resin and phenolic aldehyde amine, acid-resistant filler system, etc. With the addition of the graphene dispersion, it significantly improves the abrasive resistance, salt fog resistance, adhesion and chemical character. This article took out the coating with good acid resistance. The results showed that the acid-resistant anticorrosion coating enhanced by graphene has excellent comprehensive physical and chemical properties, such as salt fog resistance, chemical resistance, hydrogen sulfide corrosion resistance, and alkali resistance, which meet the corrosion protection requirements of H2S and CO2 in acidic oil and gas fields subsea pipelines.
Identification and characterization of complicated lithological traps within sequence stratigraphic framework – A case study in Yacheng uplift, Qiongdongnan Basin
Authors: Li Anqi , Deng Yong , Hu Lin , Ye Qi , Qiu Yu
Published: July 2020

With the increasing of lithologic reservoir reserve ratio, lithologic traps are playing an increasingly important role in worldwide oil and gas exploration. Focusing on the lithological traps in the Yacheng Uplift area, Qiongdongnan Basin, this paper introduces a work flow for identification and characterization of lithological traps within sequence stratigraphic framework. The first stepis to divide the Miocene Meishan and Sanya formation in the Yacheng Uplift area into 2 third order sequences and 5 fourth order sequences (SQ1-SQ5), and to indentify the type, characteristics and distribution of lithological traps, thus confirming the main type of lithological trap is muddy channel lateral-sealing traps which are concentratedly distributed in the highstand system tract (SQ3) of Sanya formation. The second step is to quantitatively characterize the shape, channel lateral-sealing effectiveness and oil-gas-bearing possibility of the traps by some geophysical methods such as seismic attributes, seismic slice, pre-stack and post stack acoustic inversion. By using the above techniques, a lot of channel lateral-sealing lithologic traps have been found and accurately evaluated, thus putting forward the new oil and gas exploration direction in the study area.
Research on Optimal Design of Dual Derrick for the 7th Generation Ultra-Deepwater Offshore Platform
Authors: Jiang Faguang , Zhang Min , Yang Xiuju , Liang Zheng , Wang Anyi
Published: July 2020

To solve the problem of small safety factor and heavy structure of dual derrick of the 7th generation ultra-deepwater offshore platform, the optimal design of the dual derrick is studied. Using ANSYS software, the mechanical property of dual derrick under the storm self-storage condition is analyzed. Taking the mass and safety factor of the dual derrick as the target and the beam section parameters as the design variable, after the single factor optimization, the response surface method is used to establish the comprehensive optimization mathematical model of the section parameters. The optimal combination of the section parameters is obtained. The results show that the safety factor of the original design of the dual derrick in the storm self-storage condition is less than 1.67 as required by API Spec 4F, and the bottom leg of the derrick is the most dangerous. Compared with the original scheme, the final optimization scheme of dual derrick reduces the mass by 19.11% and increases the safety factor by 23.81%, which meets the requirements of operating conditions.
Discussion on Technical Review System of Report for Soil and Water Conservation in Binzhou
Authors: Li Miaomiao , Zhang Runmingzi
Published: July 2020

Suffering severe soil and water loss, the Binzhou City needs efficient technical review system of report for soil and water conservation to curb erosion and improve the urban environment. In this article, the implementation, work contents, process of the current report review system are systematically summarized, and three suggestions are made to improve the system: firstly, clarify the review criteria; secondly, strengthen the management of expert database; thirdly, promote experts training.
High Standard Farmland Construction and Soil Conservation Evaluation
Authors: Zhang Jing , Sun Lu
Published: July 2020

In China, the quality of cultivated land is reduced, and the available cultivated land area is reduced. In order to ensure food security, the country has orderly promoted the construction of high standard basic farmland. However, there is a lack of reasonable evaluation on the high standard farmland. The evaluation of high standard farmland mainly focuses on the natural conditions of farmland and the suitability of farmland to social and economic conditions. A large number of recent studies have found that soil microorganisms have a significant impact on the quality of cultivated land. In order to evaluate the high standard farmland more reasonably, this paper attempts to add microbial factors to the high standard farmland construction evaluation, and build a more reasonable high standard farmland evaluation system.
Theory and mechanical analysis of Tube Hydroforming of hollow component
Authors: Li Hongyang , Huang Ran , Li Jianhui
Published: July 2020

Tube hydroforming is efficient plastic technology in manufacturing hollow components and is attracting more attention in the past decades. In this paper, the mechanical theory of hydroforming was studied. The external load character and internal stress character of tube hydroforming were discussed. Then, according to the characters, the function and classification of internal pressure were presented in general. Base on the stress analysis, its effect on the yield criterion and calculation formula were also researched and derived. It demonstrates that processing parameter plays an important role in tube hydroforming and formula discussed and derived by this paper is feasible in practice.
Analysis of anchor bolt stress characteristics in arch ring support of super-large underground powerhouse
Authors: Wu Hao , Liu Jian , Zhang Shujun , Zhao Chunlin , Li Xiuwen , Tian Dongcheng
Published: July 2020

Taking the surrounding rock deformation and bolt stress response characteristics during arch excavation of the left bank underground powerhouse of baihetan hydropower station as the research object, On the basis of the monitoring data of anchor stress, anchor rod stress response characteristics summarized as three types including “stepped”, “one pull one press” and “load drop”, and preliminary discussed the mechanism of bolt stress. The research results can provide important technical support for the reinforcement design of cavern in the following similar projects and have guiding significance for engineering practice.
Study on Uranium Occurrence State of Sandstone-Type Uranium Deposits in Qianjiadian Region, Songliao Basin, China
Authors: Zhang Bo , Li Jianguo , Miao Peisen , Si Qinghong
Published: July 2020

The Qianjiadian uranium deposit is located in the southwest margin of Songliao basin. In this paper, electron probe, energy spectrum, back scattering analysis, scanning electron microscopy and other experimental methods are used to study uranium occurrence form and uranium mineral type in Qiandaidian uranium deposit. The results are shown as follows. (1) The occurrence forms of uranium in Qiandaidian uranium mining area include uranium minerals, adsorption uranium. The uranium in low-grade ore is mainly in the form of dispersive adsorption, which is clay mineral and organic matter adsorption. The high-grade ore mainly exists in the form of uranium mineral, the type of uranium mineral is mainly pitchblende, followed by coffinite, a small amount of uranium mineral containing titanium. (2) Uranium minerals are often closely symbiotic with pyrite, carbonate and so on, most of them develop in the pyrite, carbonate margin and fractures in the form of colloidal, there are also granular, pellet independent distribution. (3) Uranium minerals are rich in Phosphorus, and there is an obvious positive correlation between Phosphorus and Silicon. It has been found that some samples contain phosphorus-rich uranium aggregates in microspheres, which is considered as a strong evidence that microorganisms are involved in uranium mineralization at low temperature.
Characteristics and major controlling factors of fracturing in an Archean buried-hill, Bozhong Sag, Bohai Bay Basin, China
Authors: Dai Xiaojuan , Tang Huafeng , Zhang Yan , Song Guomin , Du Xianli
Published: July 2020

Archaeozoic fractured buried-hill reservoirs have been found in the Bozhong Sag, Bohai Bay Basin, but the origin, stage and distribution of fractures are still unclear. The B-block is used as an example to explore the genesis and main controlling factors on fracture formation. Core and image log data, combined with regional geology, were used to comprehensively analyze the characteristics of fractures. High-angle shear fractures and low-to moderate-angle tensile fractures were developed in the area. Fracture development was mainly controlled by lithology. The lithologies in the study area from most fracture prone to least are monzonite, granodiorite, cataclastic rock and gneiss. This study has provided a basis for the prediction of potential reservoir areas in paleo-buried hills.
3D printed cellulose-based high-efficiency oil-water separation mesh
Authors: Zhang Xinqi , Wu Yifei , Gao Yuan
Published: July 2020

In this study, a high-performance oil-water separation mesh based on cellulose was fabricated by Direct Ink Writing (DIW) 3D printing technology. The 3D printing process can be undergo in a natural environment by using a cellulose acetate/ethyl acetate solution as a DIW printing ink. This oil-water separation mesh prepared has various advantages, such as uniform size, controllable aperture, simple and easy printing process, and rapid prototyping. The super high separation efficiency of 96 % and the high flux of 400 000 L·m−2·h−1 can be realized when the average pore size of the 3D printed super-hydrophilic cellulose mesh is 280 μm or less. Moreover, oil-water separation mesh prepared based on highly hydrophilic cellulose are chemically resistant to extreme acidity and alkalinity. It is also capable of separating oils of various viscosities. In addition, the cellulose mesh can cope with the mechanical force caused by high-frequency vibration, and maintain excellent oil-water separation efficiency in the external force field. Therefore, this highly efficient oil-water separation mesh can be used in oil-water separation processes in a variety of applications.
Exploratory Research on Full Cycle Sintering of Flue Gas
Authors: Shi Kejian , Feng Junxiao , Du Zhiwei
Published: July 2020

The pollution caused by sintering process in China’s iron and steel industry is especially serious. Strengthening the research on sintering process is of great significance to sustainable development. In this paper, a physical model of flue gas full-cycle sintering process is established, and the new process is simulated and calculated. The distribution of material layer temperature, flue gas temperature and flue gas composition content is obtained, and compared with the conventional sintering process from the five aspects of material layer maximum temperature, high temperature duration, material layer cooling speed, sintering time and emission reduction. The results show that the new process can increase the maximum temperature of the upper material layer, improve the uniformity of the temperature distribution in the material layer, and can enrich SO2, improve the removal efficiency of pollutants, and reduce emissions.
Analysis of Lithium Battery Recycling System of New Energy Vehicles under Low Carbon Background
Authors: Wang Zhe
Published: July 2020

China’s new energy vehicle sales exceeded 1 million units for two consecutive years in 2018 and 2019. China has actually become the world’s largest new energy vehicle production and sales market. Batteries are the core components of new energy vehicles. The current research and development of power batteries mainly include lead-acid batteries, nickel metal batteries, lithium batteries, super capacitors, fuel cells, solar cells, etc. Among them, lithium batteries are one of the main application categories in the current market. Due to the limited life of lithium batteries, the earliest batch of new energy vehicle lithium batteries in the market is at the threshold of elimination. How to effectively recycle and use lithium batteries has become an unavoidable environmental and social issue. This paper first briefly introduces the current status of China’s new energy vehicle and battery industry, then analyzes the problems of China’s new energy vehicle battery recycling system, and finally, puts forward some suggestions based on China’s national conditions and industry status.
Research on Green Building Energy Saving and Environmental Protection Design Based on BIM Technology
Authors: Lin Qiyan
Published: July 2020

At present, the construction industry consumes a large proportion of energy and causes serious problems to people’s living environment and living space. Therefore, the energy conservation and environmental protection of green buildings have become the focus of the construction industry. In order to make green buildings continuously improvement and sustainable development. By analyzing the advantages of BIM technology and applying it to green buildings, it simulates and analyzes important evaluation parts such as indoor lighting, outdoor acoustic environment simulation, indoor acoustics, and outdoor wind environment simulation of green buildings, and optimizes them in time to achieve energy saving of green buildings, and purpose of eco-friendly design.
Review and prospect of fog elimination technology based on acoustic condensation
Authors: Liu Chang , Tian Zhangfu , Zhao Yun , Zeng Xinwu
Published: July 2020

This paper summarizes the traditional artificial fog elimination technology and the principle and mechanism of acoustic condensation theory, reviews the simulation experiment research and application of acoustic condensation fog elimination technology. Compared with traditional fog elimination technology, sum up the advantages and disadvantages of acoustic condensation fog elimination technology. Put forward the existing problems and future research direction of acoustic condensation fog elimination field.
Analysis on Spatial Pattern Changes of Land Resources Utilization and Soil Pollution Sources in the New Period
Authors: Guo Bin , Liu Ning , Sui Haozhi
Published: July 2020

Land use change is an important part of global change, and land use research has also become the focus of global change research. With the growth of population and the economic development of society, the relationship between human beings and land is getting closer and closer, and the interaction is getting stronger and stronger. The resources and environmental problems brought by it have also received strong attention from all walks of life. The use of change has become a major factor in environmental change. At present, environmental problems have become the key link in ecological problems, and in environmental problems, soil pollution is one of the major sources of pollution. Soil pollution can affect crop yields and even contaminate groundwater, so soil pollution has always been a key link in pollution prevention. This paper introduces the connotation and related theories of land resource utilization change, and analyzes the formation and classification of soil pollution sources and the problems of land resource space utilization in the new era. On the basis of reviewing the status quo of soil pollution in China, this paper analyzes the risk analysis and damage of soil pollution, and studies the spatial and temporal pattern change of land use and soil pollution control countermeasures in the new period. In recent years, China’s environmental problems have become increasingly prominent, including soil pollution is relatively serious, soil pollution has a certain uniqueness, relatively hidden, lagging and long-lasting, it will cause pollution to crops and food, which in turn affect people’s health and soil pollution. Not only does it affect humans through crops, but it can also enter the human body through direct contact or breathing, causing harm to the human body. The research and analysis in this paper is to achieve the sustainable use of land resources in the new era and to ensure that people have access to adequate and safe food and living environment.
Evaluation and Strategy of New-type Urbanization Policy Based On S-CAD Method - A Case Study of Wuhan, China
Authors: Wei Wei , Li Mengchen , Jiao Yongli
Published: July 2020

Using S-CAD policy evaluation method to carry out effect, economic and feasibility analysis on Wuhan’s new urbanization policy, the evaluation results show that the logic, needs and feasibility of the policy elements are good, and the adequacy of the policy chain is relatively inadequate, Wuhan’s various policies promote new-type urbanization effectively and implement the central-level strategies and goals. The next step is to increase efforts to promote equalization of public services, regional coordinated development, and urban quality improvement. Through the case study of Wuhan, it is verified that the S-CAD method is a meta-method and policy evaluation system that combines political wisdom and scientific knowledge, taking into account qualitative judgment and quantitative analysis, and can be applied to the evaluation of new urbanization construction in cities.
Research on Scientific Strategy and Technology of Agricultural Non-point Source Pollution Control
Authors: Tang Jinli
Published: July 2020

In order to explore expansion of agricultural non-point source pollution in China is mainly related to excessive use of chemical fertilizers and pesticides, backward fertilization methods, low utilization of organic waste in the aquaculture industry, insufficient promotion of advanced agricultural technologies, and relatively weak public environmental awareness. This article focuses on the research directions of agricultural and rural pollution control and environmental protection, efficient recycling of fertilizer resources, and environmental control of production areas, and carries out related technical and environmental engineering constructions. In this paper, in the process of fully grasping the growth of crops, we will increase the technical research on environmental engineering This article studies the use of effective environmental regulation engineering technology to develop the agricultural.
Pollution Control of Exhaust Emissions of Marine Diesel Engines
Authors: Sun Changfei , Li Yong
Published: July 2020

This paper describes the impact of marine diesel engine exhaust gas on the atmospheric environment and the international control requirements for marine diesel engine emissions internationally; introduces the current technical measures to reduce emissions of diesel engine exhaust pollution. On this basis, the advantages and disadvantages of each measure and the application scopes are explored.
Impact and Suggestions of Sea Level Rise on the Survival of Tuvalu: Evidence from Mathematical and Computer Modeling
Authors: Yang Hengyi , Hou Mengnan , Cui Aoran
Published: July 2020

Existing research indicates that many countries are in danger of disappearing completely due to sea level rise. Therefore, many environmentally displaced persons (EDPs) will be generated. The number of these EDPs and the ways of resettling with humanitarianism are promising issues. Tuvalu is the fourth smallest country in the world, and its country has stated that it has plans to relocate the country, so it has attracted our attention. Firstly, assuming that the population of the area is not affected by sea level, establish block population growth model, predict the future normal population. At the same time, build the prediction model of BP neural network based on EMD to predict the future sea level, and the connection between the two models is time. When the sea level reaches a certain threshold, the area’s environment is no longer stable, and in this time the year when the threshold was reached and the corresponding population were determined. We use the analytic hierarchy process to evaluate the influences of various social policies on cultural loss risk, which can effectively adjust the policy and protect the diversity of culture. Accepting refugees to the society, economy and culture of a country is a great challenge. Later, we set up the secondary fuzzy comprehensive evaluation model, and a lot of impact factors are classified as economic, social, ecological and other categories. Standardize and normalize the data. Using the entropy weight method to determine the weight of each index. Give a score for every country, and countries or regions of high scores have the ability to accept the refugees. Last, we use the analytic hierarchy process to evaluate the influences of various social policies on cultural loss risk, which can effectively adjust the policy and protect the diversity of culture.
Analysis and optimization of green ecological infrastructure based on GIS -- Taking the new town in the north of Jiangjin District of Chongqing as an example
Authors: Liu Shan , Wei Shule
Published: July 2020

With the rapid development of urbanization, urban ecosystem is facing an unprecedented threat. At the same time, the concept of green ecological infrastructure has attracted more and more attention. In the practice of engineering design, the priority is given to the corresponding analysis and evaluation of green ecological infrastructure. With the aid of ArcGIS software, the analysis is carried out in the process of natural process, biological process and local cultural landscape. On this basis, the evaluation is carried out according to the detailed data, and the optimization strategy is proposed. In order to provide a scientific basis for the later planning and design. Taking the northern new town of Jiangjin District of Chongqing as an example, this paper verifies the rationality and popularization of the analysis and optimization of green ecological infrastructure, which is of great significance to the realization of sustainable and environment-friendly urban future development path.
Study on Assessment Index System of Water Resources
Authors: Min Zhihua , Sun Hua
Published: July 2020

Taking strategy of sustainable development as a guide, the paper briefly explains the connotation of sustainable utilization of water resources, and establishes assessment index system, including water resources, social development, economic growth and ecological environment, and determines assessment index criteria. The AHP is used to determine weight and the grey correlation is used to build assessment model. The assessment index system of water resources is studied in combination with socio-economic development and ecological environmental protection criteria.
The Role of Sodium-alkali Waste Gas Washing and Desulfurization Technology in the Exhaust Gas Treatment of Marine Diesel Engines
Authors: Liang Ensheng
Published: July 2020

to reduce the concentration of sulfur oxide in the exhaust gas of marine diesel engines, the application of sodium-alkali waste gas washing and desulfurization technology in the exhaust gas treatment of marine diesel engines is explored. First, the reaction mechanism of sodium-alkali wet washing desulfurization technology is introduced, including the absorption process model of sulfur oxide, the absorption rate equation, the equation for absorbing sulfur oxide in aqueous solution, and the process of dissolving and absorbing sulfur oxide in sodium hydroxide solution. Then, a method to improve the absorption rate of sulfur oxides is proposed. Finally, the influence of load and pH of washing solution on desulfurization efficiency is discussed. The results show that the sodium-alkali waste gas washing and desulfurization technology has a good desulfurization efficiency. The desulfurization efficiency under different loads is more than 99%, and the maximum is 99.7%, which meets the desulfurization requirements of the national heavy oil exhaust gas treatment system. The higher the pH of washing solution, the more obvious the desulfurization efficiency. The results of this research provide a theoretical basis for the development of Chinese ships.
Influencing Factors Model of Carbon Emissions from a Global Perspectives
Authors: Wu Haoyu , Qiu Fengkai , Li Hongze , Zeng Ming , Sun Chenjun
Published: July 2020

This paper studies the relationship and differences between carbon emissions and industrial development in four countries with different development levels from a global perspective. First, the Tapio decoupling model was established, and the overall dependence of countries of various development levels on carbon emissions was analyzed from strong to weak. Then, establish a panel data model to study the influencing factors of carbon emissions in countries with different development levels from 2015 to 2019. The results show that the added value of industry and agriculture has a significant positive effect on carbon emissions in countries of various development levels, and forest area has a significant negative effect on carbon emissions. Developed countries are still the largest emitters. Therefore, industrial and agricultural production is still the most important factor affecting carbon emissions, and the increase in forest area helps reduce the impact of carbon dioxide.
Research on the Impact of Carbon Emissions Based on Nash Equilibrium Model
Authors: Wang Xing , Wang Shengyan , Dong Houqi , Zeng Ming , Sun Chenjun
Published: July 2020

Based on the Cournot dual-oligonucleotide head model, this paper studies the Impact of carbon emission rights on Enterprises Based on Nash Equilibrium. The following finds analytical expressions of production enterprises’ output changes to analyze the impact of enterprises. As a result, it was found that the distribution of carbon emission rights would damage consumers’ rights and interests. In addition, some sufficient conditions for the historical emission law to affect producers’ residual changes in the carbon emissions trading system are also discussed.
Research on Enterprise sewage treatment based on infiltration Technology
Authors: Wang Xinyang
Published: July 2020

as circulating water resources in iron and steel enterprises, reclaimed water reuse has been paid more and more attention by major iron and steel enterprises. The double membrane desalination process of ultrafiltration and reverse osmosis has been gradually applied to the advanced treatment of industrial wastewater in iron and steel enterprises. From the actual operation effect of the enterprise, there are some phenomena in varying degrees, such as fast pollution plugging of reverse osmosis system, frequent cleaning and the decline of reverse osmosis desalination rate caused by frequent cleaning. This paper makes a preliminary analysis of the common problems occurred in the application of the reverse osmosis process in the treatment of industrial sewage in the whole plant.
Research on sewage treatment under PPP mode
Authors: Wang Xinyang , Yang Lei , Tian Guyue
Published: July 2020

With the continuous progress of China’s reform and opening-up, China’s market economy is becoming more and more perfect, and the scientific and economic level of our country is getting higher and higher, but with the continuous improvement of economic strength, people’s awareness of environmental protection is getting stronger and stronger, and the requirements for the living environment are also getting higher and higher. Sewage treatment, which plays an important role in environmental protection, has attracted people’s attention. at present, our country mainly treats the sewage produced in production and life through the establishment of sewage treatment plants. PPP mode is a very suitable and popular sewage treatment mode. This paper mainly focuses on the characteristics and concept of PPP mode and the various advantages of using PPP mode to deal with sewage, targeted sewage treatment, reduce water pollution, better achieve the goal of energy-saving and emission reduction, and protect the environment.
Research on Energy Saving greenhouse based on Sunlight Environment
Authors: Chen Jintian
Published: July 2020

This paper combs the current research on the energy-saving greenhouse in a daylight environment. The application and research progress of thermal insulation and energy-saving technology in the solar greenhouse in China are introduced from the aspects of location, type, orientation, front roof, rear roof, wall, multi-layer cover in a greenhouse, cold prevention ditch, cheap energy, utilization and cultivation of energy-saving equipment, operation, and management. Finally, some suggestions are given for the future research of energy-saving greenhouse in the solar environment, to make a certain contribution to the research of energy-saving greenhouse in the solar environment.
Research and Design of Marine Trash Classification Robot Based on Color Recognition
Authors: Dong Xun
Published: July 2020

The UN (United Nations) identifies sustainable development of the marine ecosystem as a major goal. To achieve the goal, the garbage in the ocean has to be removed, and as people recognize that different types of classification should be disposed differently, classification is critical after garbage is collected. This led to the engineering goal of constructing a robot that can pick up garbage in the water and classify the garbage into its right category. The robot was developed by attaining four critical functions: driving under water condition, a set of gripper, color recognition and garbage classification. Results of data obtained from developing the garbage classification was plotted on multiple graphs including training and validation loss, training time, training and testing accuracy and so on. After the critical functions are fulfilled, it is shown that the accumulative testing accuracy for garbage classification algorithm was around 90.6%, while the programs for the other three critical functions all compiled successfully. It was a regret that datasets weren’t shaped to the same sizes and the critical functions should be synthesized for further research.
Study on the treatment of actual waste-water by CWAO method
Authors: Zhang Yongxun , Wang Yibo
Published: July 2020

The use of catalytic wet air oxidation (CWAO) technology to treat organic waste-water that is difficult to biodegrade had a significant effect. The following 12 types of waste-water have achieved good results with the CWAO method. The 12 types of waste-water include: papermaking waste-water, dye waste-water, pesticide waste-water, perfume waste-water, phenol waste-water, carbon-containing waste-water, ethanol waste-water, petrochemical company alkali residue waste-water, and oil extraction waste-water, ammonia-containing coking waste-water and pesticide waste-water, cleaning workshop emulsified waste-water and desizing waste-water. A typical homogeneous catalytic wet oxidation system includes 5 processes: Ciba Geigy, Bayer Loprox, WPO, Orcan, and IT Enviroscience. Heterogeneous catalysts lose their activity due to the low pH of the reaction system and the accumulation of activated carbon.
A Study on Characteristics of Heavy Metal Elements in Atmospheric PM2.5 During Winter in Chengdu
Authors: Liu Hefan , Song Danlin , Zhang Xin , Huang Fengxia , Hu Xiang
Published: July 2020

This paper conducted an in-depth analysis on the characteristics of components of heavy metals in PM2.5 by studying the atmospheric heavy metal elements during winter in Chengdu. On the basis of the limiting value of heavy metal element concentration in PM2.5 in major cities at home and abroad and the national standard limiting value on heavy metal element concentration, this paper compared and evaluated the pollution level of heavy metal elements in PM2.5 during winter in Chengdu and analyzed the typical characteristics of heavy metal elements in haze days and non-haze days as well as the potential sources. The following conclusions were drawn: 1) in PM2.5 during winter in Chengdu, the major component was K, minor components were Fe, Ca, Zn, Cu, Pb, Ba, Mn, As, Cr and Cd, trace components were Se, Ag, Hg, Ni, V, Au and Ga and ultra-trace components were Co, Sb, Ti and Sn, and the proportion of the aforementioned components was 2.10706%, 2.14783%, 0.01933% and 0.00009% respectively; 2) the major component, minor component, trace component and ultra-trace component of heavy metal elements respectively accounted for 1.621%, 1.641%, 0.016% and 0.00004% of PM2.5; 3) the proportion of all the heavy metal components in PM2.5 in haze days was lower than that in non-haze days, which indicates that the relatively high concentration of PM2.5 might be caused by non-metallic salts; 4) in PM2.5, the proportion of Pb, Cd, Mn and Cu was lower than both the domestic average level and the international average level; the proportion of Zn and Ni was at the domestic average level but slightly higher than the international average level; and the proportion of As was at both the domestic average level and the international average level; 5) the mean value of Pb concentration during winter was 0.08717µg/m3, which was lower than the limiting value of the national standard GB 3095-2012; and 6) there was a rather high level of consistency between such elements as were K, Ca, Fe, Zn and Ag as well as PM2.5 on the typical haze day, which shows that obvious colinearity existed in the emission source of the aforesaid elements and such elements might come from road dust sources; on the typical non-haze day, random-peak daily variation occurred in heavy metal components, which might result from unorganized emission from peripheral pollution sources; however, the proportion of ultra-trace components of heavy metals on the typical non-haze day was slightly higher than that on the typical haze day, which might be closely related to the local background transmission.
Indicator System for Environmental Impact Assessment Of Water Resources Protection And Utilization Planning
Authors: Liu Haonan , Guo Pan , Jin Xin
Published: July 2020

The environmental impact assessment of water resources protection and utilization planning is a comprehensive assessment of the natural, economic, and social environment of the project area and its neighboring areas caused by water resources projects. The rational development and utilization of water resources, protection of ecology and the environment, and promotion of regional Sustainable development provides scientific decisions and basis. This paper analyzes the characteristics of the environmental impact assessment indicator system for water resources protection and utilization planning, points out the basic framework and principles for establishing an indicator system, proposes a specific indicator system, and clarifies the significance of each indicator.
Study on the Impact of Changes of Gaseous Pollutant SO2 Index on Human Health in Gansu Plateau in the Past Three Years
Authors: Liu Shangjun
Published: July 2020

The literature data method, instrument measurement method and mathematical statistics method are used to track the changes of SO2 in the Gansu Plateau in the past three years. The results show that the daily variation of SO2 in the Gansu Plateau has a double peak, the monthly variation shows a “U” shape with high data at both ends, and the annual variation shows that the SO2 index is decreasing year by year. In response to the above data changes, coping strategies are proposed from the perspective of human health.
Research on Detection and Analysis of Marine Ecological Environment Based on Big Data
Authors: Chen Chen , Zhang Yao , Shi Xiaoyong
Published: July 2020

Facing the integration of multi-source and heterogeneous massive data, traditional integration methods and technologies cannot be realized until the emergence of big data technology. The application of big data technology to realize the integration of multi-source heterogeneous marine environment monitoring data is conducive to the sharing of marine environment monitoring data, avoids the emergence of information islands, and provides the required data for data analysis and mining. Therefore, the thesis is based on the research of the marine environment pollution information intelligent image monitoring technology as the core, and analyses the marine environment pollution information intelligent image monitoring technology, including intelligent digital remote sensing technology, reasonable use of water quality transmitters, comparative analysis of big data, etc. Based on this, a more in-depth analysis of the testing of information intelligent image monitoring technology is carried out.
Noise Control in the process of moving water by compressed air
Authors: Qin Ziming , Xiao Longzhou , Cai Biaohua
Published: July 2020

Pressure oscillation or surging in pipes can cause noise problems to the environment. In this paper, noise control methods are investigated in the process of moving water by compressed air. An experimental setup is built according to the real system. First, the pressure, noise and vibration of the valve and the pipes are tested. Secondly, a new type of control valve is developed. Thirdly, the effect of shorting the valve-shutting time is tested. Finally, a noise reduction of 13~24dB is realized.
Purification System of Domestic Waste Incineration Flue Gas
Authors: Pan Wenbo , Zhong Shaotao , Geng Man , Chen Dingsheng
Published: July 2020

Flue gas will be emitted during the waste incineration power generation process. The flue gas contains toxic and harmful ingredients. If it is not treated, it will cause serious harm to human health and the environment. Therefore, the incineration flue gas needs to be purified. In this paper, combined with the monitoring of a large-scale waste incineration power plant incinerator flue gas purification treatment project, the combined process of “in-furnace denitrification (SNCR) + semi-dry deacidification + slaked lime and activated carbon (dry process) injection + bag filter”. The purification effect of flue gas shows that the process has a good purification effect on domestic waste incineration flue gas. This study can provide reference and basis for the treatment of incineration flue gas in the industry.