bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effect of anodic potential on bornite dissolution: A key button of copper pollution
Authors: Lin Hao , Wang Jun , Qiu Guanzhou 
Published: January 2021

Abstract
The relationship between anodic potential and sulfur film of bornite in acidic electrolyte was investigated by electrochemical experiments and surface analytical techniques. The formation of sulfur film decreased the conductivity of bornite, and the initial current density of bornite was positively correlated with subjected potential due to thermodynamic energy. The higher potential hindered the formation of sulfur precipitates Sn
2-/S0 and forced products of bornite diffuse into electrolyte. The S 2p
3/2
spectrum proved that S2- has been converted to S2
2-, Sn
2-/S0 and SO4
2- during bornite dissolution. Combined with the composition of sulfur film formed on the bornite surface, the passive effect of sulfur film was mainly caused by formed Sn
2-/S0. The solution potential was the primary factor in the bornite dissolution under acidic environment.
Design Of Pluggable Solar Greenhouse
Authors: Wenxiong Yang , Chengwei Ma 
Published: January 2021

Abstract
Original design of a plug-in assembly type solar greenhouse, good insulation effect, plug and pull, can change the height and length of the wall according to production needs. This new type of solar greenhouse adopts plug-in heat preservation wall. This kind of wall adopts standardized module, which can be industrialized mass production. It has the advantages of low cost, convenient disassembly, assembly and transportation, and protection of land and environment.
Advances in Cd Remediation Techniques for Contaminated Soils
Authors: Changjia Jiang , Shuang Cui , Qi Feng , Xiuli Sun 
Published: January 2021

Abstract
For heavy metal Cd pollution, here are two general ideas for solving Cd pollution. Firstly, Cd separated or extracted from the soil and decreased in soil Cd content. Secondly, the existence of Cd were changed in soil, reduced its mobility and bioavailability. At present Cd contaminated soil remediation technology is divided into three main categories: physical remediation technology, chemical remediation technology, bioremediation technology.
Review on the connotation, Evaluation and Path of Industrial High Quality Development in the Yellow River Basin
Authors: Li Linshan , Li Wei 
Published: January 2021

AbstractThe Yellow River Basin is an important ecological barrier and an important economic zone in China, which plays a very important role in ecological security and economic and social development in China. The industrial foundation of the Yellow River Basin is solid, with huge market potential, but there are also many problems. Through literature combing, identifying the connotation of watershed industrial high-quality development, comparing the evaluation index system of industrial development quality, summing up the countermeasures and suggestions of high-quality development path, which provides useful inspiration for the study of high-quality development theory of watershed industrial economics and economic geography in China.
Research on Ecological Environment Changes Based on Remote Sensing Monitoring Perspective
Authors: Yuan Qingmin , Wang Haoting 
Published: January 2021

Abstract
Accelerating process of urbanization has brought about a series of ecological and environmental problems. In this paper, vegetation index, humidity index, surface temperature, and building-bare soil index are used to quantitatively characterize the four ecological element indexes of greenness, humidity, heat and dryness. Through principal component analysis, a remote sensing ecological index model is established, and this article comparatively analyzes the remote sensing ecological index in 2014 and 2019 from the two dimensions of time and space. The results show that the ecological environment of Qingdao is partially optimized and improved but the overall trend is decreasing.
Effect of humidity on atmospheric VOCs measurement
Authors: Bi Zhe , Shi Yaolong , Wang Zhen , Han Xiao , Wang Man 
Published: January 2021

Abstract
Trace volatile organic compounds (VOCs) play an important role in physic-chemical processes of the troposphere. Accurate measurement of ambient VOCs is needed. However, the determination of VOCs is difficult due to the large amount of water in atmosphere. A dynamic dilution and humidifying system was developed to study the impact of water on ambient VOCs measurement. Result showed that the deviation of aldehydes and ketones was much larger comparing with the BTEX compounds. And the C10-C11 compounds were more susceptible to air humidity compared with C6-C8 compounds. This showed that the hydrophilic compounds and compounds with high carbon number were more susceptible to air humidity comparing with hydrophobic compounds and compounds with lower carbon number.
Optimization of recharged water quantity of Yufuhe River in Jinan City based on Hydrus-2D Software, China
Authors: Sun Xiuxiu , Ren Qinglian , Wang Weiping , Xu Qiaoyi , Wang Qing 
Published: January 2021

Abstract
Jinan, Shandong Province, China frequently faces challenges related to spring protection and water supply security, and managed aquifer recharge (MAR) presents an effective solution to these challenges. Three MAR projects with multiple sources in Yufuhe River in Western Jinan City are conductive to increasing groundwater supply and maintaining groundwater levels. In order to determine the reasonable recharge flows and time, the hydrogeological conditions of the study area were described, the river infiltration recharge processes were simulated by Hydrus-2D software, and the recharge schemes for different groundwater depths were put forward. The results show that the model can achieve the better fitting effect. When the releasing flow is small, the optimal scheme is to continuously discharge water by 286800, 282500 and 282000 m3/d for 19.5, 12.7 and 10.5 days when the groundwater depth is 42, 30, 23 m at Cuima Village respectively. This study has certain significance for the efficient water lease of the Yufuhe River recharge project in Jinan City.
Design of Patrol Unmanned Aerial Vehicle Based on MPU9250
Authors: Tang Yanfeng , Lin Songbin 
Published: January 2021

Abstract
To improve the attitude control accuracy of quadcopter UAVs, a patrol UAV with STM32 as the main controller and MPU9250 as the attitude detection module is designed in this paper. For attitude control part, a kind of attitude control algorithm which preprocesses by extended Kalman filter algorithm is designed and then a cascade PID control algorithm is adopted. The test flight results show that the UAV can achieve functions of lifting, rolling, pitching, yawing and hovering.
Design Water Level Calculation And Analysis Of Chittagong Power Plant Project In Bangladesh
Authors: Guan Ning , Chen Hanbao , Xu Yanan , Luan Yingni , Tan Zhonghua 
Published: January 2021

Abstract
The design water level calculation methods in the Chinese and foreign codes are different. The design high and low water levels and extreme high and low water levels in the Chinese norms are calculated using historical cumulative frequencies with tide level data of not less than 1 year and 20 years, respectively. In foreign norms, the average high and low tide levels of spring tides are mostly used as the design high and low water levels, and for the sea areas lacking long-term measured data, the water level combination method is mostly used to determine the extreme water levels. This paper compares the results of different methods used to calculate the design water level using the Chittagong Power Plant in Bangladesh as an example. The calculations show that it is safer to use the tidal eigenvalue method to determine the design high and low water levels, and that the Water Level Combination Method is more suitable for extreme water level determination than Bangladesh National Building Code.
Research on Change Laws of Pore Water Pressure of Soft Clay in the Large-scale Wave Flume
Authors: Zhen Liu , Yongzhou Cheng , Huaqing Zhang , Xiangwei Meng , Yunpeng Jiang , longzai Ge 
Published: January 2021

Abstract
The study on the interaction between wave structure and soft clay foundation is carried out in the large scale wave flume trough of the Academy of communications and transportation under the construction of the research on the failure mechanism and design parameters of the port hydraulic structure under the harsh hydrology condition. The remolding technology of the soft clay foundation of the Yangtze River mouth is studied. The model test scale of is 1:5. In the test, the strength of the original soil can be reduced to the similarity of the test phenomenon. The soil strength is reduced by increasing the water content of the original soil, and a series of tests are made on the characteristics of the original soil. The strength of soil increases with the increase of static time. The early growth is fast and the later growth is slow. In the experiment, the soil pressure and pore water pressure sensor were arranged to observe the change rule of soil pressure and pore water pressure under the action of wave. By arranging water pressure sensor and laser displacement sensor, the force and settlement of the structure of the semicircle caisson were observed. In this paper, the variation rule of earth pressure and pore water pressure under different wave heights and longtime waves are studied. The pore pressure and soil pressure change with the wave action, the influence of pore pressure increases with the increase of wave height. Maximum pore pressure occurs at a certain depth of soil. The change in pore pressure is irregular. After a certain value is reached, the soil is softened and destroyed.
Experiment of Ship Maneuvering Motion in Muddy Navigation Area
Authors: Peng Wen Chun , Ni Luan Ying , Xiu Pang Qi , Bo Zhang Rui 
Published: January 2021

Abstract
In order to make full use of natural resources and ensure the safety of the ship navigation, based on the self-designed ship trajectory tracking system, the self-propelled model test of ship maneuverability which include cycle test and zig-zag test under the combined effects of water and fluid mud was completed in the test pool. And then based on the results of the tests, the influences of under-keel clearance on ship resistance, heading stability and turning radius were analyzed, and the maneuverability of the ship’s navigation in the fluid mud was comprehensively evaluated. The results show that as the under-keel clearance decreases, the linear stability of the ship increases, but its maneuverability deteriorates. In order to ensure safety, the depth of ship dragging into the fluid mud must be less than 10% of ship’s draft.
Experimental study on wave-induced load on crest wall in North Indian Ocean
Authors: Jiang Yunpeng , Chen Hanbao , Ji Zezhou , Zhang Huaqing 
Published: January 2021

Abstract
Wave-induced load is one of the most important aspects in the design of coastal engineering. It is well known that long period waves are very common along the coast of the Atlantic and India ocean, which is rather different from wind waves. Many coastal projects were designed by China Design Code and American Coastal Engineering Manual (CEM). Physical model test was carried out in this paper to study wave loading of crest wall under impulsive action by long-period wave. The result of test was compared with China Design Code and CEM. And then a verification test was also adopted to prove that there was obvious difference between them. It was indicated that China code and CEM had very close results but much smaller than that of model test, with ratio of 1:5. The long-period wave load on crest wall was much more than results by empirical formula. The isolated crest wall and rear unsupported was also taken up with wave action and it was destroyed easily. So impulsive action by long-period wave on crest wall should be paid more attention in project design. The scope of empirical formula is limited and physical model test is indispensable for the reliability of structure.
Monitoring of the Effects of Dry and Wet Dust Removal Equipment at a Coal Port Transfer Station
Authors: Hong Ningning , Peng Shitao , Ye Yin , Hu Tao , Su Ning 
Published: January 2021

Abstract
Dust removal technology in port transfer station is divided into dry and wet types. Based on the monitoring data of a professional coal port, this paper compares the dust removal rates of dry and wet dust removal equipment in transfer station. The monitoring results show that the dust suppression rate of wet dust removal equipment in port transfer station is nearly twice of dry dust removal equipment. The results of this paper can provide a reference for the dust removal scheme decision of dry bulk cargo terminal transfer station.
Refined Dust Fine Control Method of Bulk Cargo Yard Based on Whole-field Monitoring
Authors: Ye Yin , Hong Ningning , Su Ning , Peng Shitao 
Published: January 2021

Abstract
The fine dust control method and control system of bulk cargo yard based on whole-site monitoring are realized through the following paths. Firstly, the extinction coefficient of the whole area of the storage yard is obtained by using lidar, and the proportion relationship between the extinction coefficient and the dust concentration data measured at the same position is obtained to obtain the dust concentration distribution in the whole area. Secondly, the radar scanning plane is divided into N grids with the control range of each spray head as a grid unit, and the average dust concentration in each grid is calculated. Thirdly, the critical value of the average dust concentration and the critical value of dust contribution rate are set to judge the grid that needs to start the sprinkler head. Repeat the above process to achieve continuous fine control of dust in bulk cargo yard. The system not only improves the efficiency of dust suppression, but also reduces the amount of sprayed water, achieves the purpose of improving the efficiency of environmental protection effects, reducing the labor intensity of workers, and maximizing the utilization of water resources while effectively removing dust.
Influence of guaranteed power supply service on competitive power market and compensation mechanism design
Authors: Wang Dongfa , Ding Weibing , Gao Feng , Xu Yang , Hu Jiahua 
Published: January 2021

Abstract
In the modern power market system, it is necessary to establish a mature power supply guarantee service mechanism to protect the rights and interests of all users, realize the reasonable allocation of power resources and achieve the “Pareto improvement” of social welfare. Based on a broader definition of guaranteed power supply service, this paper clarifies the scope and mode of guaranteed power supply service, calculates the power supply cost and market clearing electricity of guaranteed power supply service, and designs a corresponding compensation mechanism system to promote the sustainable development of guaranteed power supply service. In the long run, guaranteed power supply service should return to the market mechanism, pricing based on “power supply cost + reasonable profit”, and become an essential part of the competitive power market.
Low-speed wind turbine design based on Wilson theory
Authors: Yunhao Chen , Danmei Hu , Zhenjiang Zhao 
Published: January 2021

Abstract
As a clean and renewable energy with huge reserves, wind energy has been widely developed and utilized worldwide. Wind turbine blades are one of the main components of wind power generation. The degree of conversion of wind energy by the blades can determine the efficiency of the wind turbine. This paper aims to optimize the design of low-speed wind turbine blades with a rated power of 600 kW and an average wind speed of 4.3 m/s at the hub height. Wind turbines use variable speed and pitch control to determine the design parameters of the wind turbine. We choose an airfoil with good aerodynamic performance at low wind speeds. The Wilson design method is used to calculate the chord length, torsion angle and other parameters of each segment of the blade, complete the preliminary shape design of the low-speed blade, and calculate its aerodynamic performance.
Design of Intelligent Firefighter Helmet Based on AR Technology
Authors: Dianxi Zhang , Danhongand Chen , Zhen Gong 
Published: January 2021

Abstract
Traditional firefighter helmet has the disadvantages of poor shading and lack of flexibility. AR is the process of computing 3d coordinate points according to the image points of real objects, and then superimposing “virtual + real” surreal scenes based on real scenery through the calculation simulation of the processor. The AR firefighter helmet is a new type of firefighting protective that uses AR technology in traditional firefighter helmet. Intelligent firefighter helmet based on AR technology uses 3D simulation imaging technology, thermal camera tracking technology, human-computer interaction technology, and code recognition technology to maximize the effect of realistic fire scenes. It can enable firefighters to see the real situation in the scene of heavy smoke and improve the efficiency of rescue. Therefore, firefighter helmets with AR equipment represent the future development trend of firefighter helmet. This paper discusses the theory, value, technical operation, design and development of intelligence. The research on the fireman’s helmet based on augmented reality technology has leading advantages and application value.
Fractional plasticity with anisotropic yielding
Authors: Lu Wei 
Published: January 2021

Abstract
Granular soil in the field may have an extent of anisotropy, due to natural sedimentation process. To capture the anisotropic constitutive behaviour of such granular soil, an anisotropic fractional-order plasticity approach based on an anisotropic yielding surface is developed in this study. By calculating the stress gradient on the anisotropic yielding surface, a state-dependent stress-dilatancy relation considering material anisotropy is obtained. Then, several different triaxial test results of anisotropically consolidated granular soil are simulated and compared by the model. It is found that the proposed anisotropic fractional plasticity model can reasonably simulate the stress-strain behaviour of silty sand Merriespruit tailing. However, more effort needs to be carried out to enhance the model for more complicated loading condition.
Research on Building Energy Saving Reconstruction of Industrial Park in Urban Fringe Residential Area in Hot Summer and Cold Winter Area
Authors: Zhou Bailing , Wang Junxuan , Xu Liang 
Published: January 2021

Abstract
We find that there are some problems in the process of energy-saving transformation of existing buildings in the urban fringe Industrial Park: according to the current norms, adopting standardized energy-saving transformation scheme, ignoring the actual energy consumption composition of local specific buildings. Based on this, we try to take the government led and household participation as the standard operation procedure to investigate the energy consumption situation, diagnose the weak links, evaluate the transformation results and determine the transformation scheme as the standard operation procedures.
Study on optimization design of roadway cross-section form in Xinyu mine
Authors: Kong Xiang-song , Xiao Sheng-chao , He Pei-xian , Lu Yun-fang , Zhang Tian-yu 
Published: January 2021

Abstract
The stability of roadway is of great significance to mine safety production. In this paper, according to the geological conditions of Xinyu coal mine, the cross-section form of track roadway is optimized. Under the condition of the same ratio of height to width, rectangular section, circular arch section and straight wall semicircular arch section are designed respectively. FLAC3D is used to establish numerical model to simulate three kinds of section forms. The optimal section form is obtained by analyzing displacement field, plastic zone distribution and stress field. The results show that: (1) The cross-section form of coal mine roadway is an important factor affecting the stability of roadway. (2) Under the same ratio of height to width, the stability of roadway from high to low is straight wall semicircular arch, circular arch and rectangle. (3) The field test data show that the straight wall semicircular arch roadway has good engineering effect. (4) Comprehensive comparison shows that the straight wall semicircle arch is the best roadway section form. The research results can provide reference for the design of roadway section form in the future.
Factorial model of the strategy of increasing the level of energy security of enterprises in terms of resource-saving
Authors: Voynarenko M , Mykoliuk O , Kucherova H , Bobrovnyk V 
Published: January 2021

Abstract
The strategy of increasing the energy security of enterprises, and also the factors of influence on their production relations, socio-economic development and functioning in a crisis are studied. It is proved that the scarcity of energy resources requires an assessment of the factors influencing energy security and taking them into account in the formation of business strategies. The concept of energy security was further developed through the prism of a factor model of strategy implementation taking into account energy saving policy. In the course of the research the methods of critical analysis, structuralization, factorial, generalization, scenario, matrix, impulse process was used. The scientific result concerns a substantiated strategy to increase the level of energy security of enterprises based on the structuring of the factor environment and the built factor model that takes into account formal and informal aspects. The practical value of the study consists in substantiated strategic measures, the implementation of which ensures the maximum possible growth of energy security of enterprises, in particular: investment in energy efficiency, energy efficiency of enterprises, development of eco-consciousness of staff, which allows to justify a stable and prone system of energy security of the state to growth.
Models and strategies for financing innovative energy saving activities
Authors: Heyets Valeriy , Voynarenko Mykhailo , Dzhedzhula Viacheslav , Yepifanova Iryna , Trocikowski Tadeusz 
Published: January 2021

Abstract
In modern conditions, a very important issue to ensure sustainable development is the constant implementation of innovation activity. Taking into account the high cost of energy carriers, the implementation of innovative energy saving activity is a very important issue. In this paper, the authors have simulated the process of intellectual support for management decisions to determine the sources of funding for innovative energy saving activity. The proposed mathematical model allows to use the concentrated experience of experts for intellectual support of decision-making on the estimation of efficiency of financial maintenance of innovation activity. The received results show that the evaluation of priority strategic directions for machine-building enterprises in terms of efficiency of financial support of innovation activity will determine a hierarchical structured set of innovation strategies for each enterprise, taking into consideration the available financial support and external and internal environment of the enterprise. The first section in your paper.