bluuebunny/crossref_metadata_2025_split huggingface dataset:
Knowledge of the Importance of Behavioral Management Skills of Agricultural Extension Officials in Iraq and Their Relationship with Some Variables
Authors: Al-Hamadany M. H. , Murad H. S. , Amin S. J. 
Published: May 2021

Abstract
This research chiefly aimed to determine degree of knowledge of the behavioral management skills of agricultural extension officials in Iraq as well as the importance of those skills, and to determine the relationship between knowledge of the behavioral management skills of agricultural instructional officials in Iraq and the studied independent variables. The survey methodology has been used in conducting the research. The questionnaire form has been designed to fulfill the research’s objectives. The required adjustments were been made in April 2019 by a group of experts in this field. Statistical methods such as arithmetic mean, standard deviation and correlation coefficient were applied. The study was included all agricultural Extension officials (Division and Section Officer) in the Department of Agricultural Extension and Training, agricultural extension officials in Iraqi directorates of agriculture and officials of extension centers (145 official) Whereas, 20 officials have been excluded in order to verify the reliability of the research scale. The most notable results have been 48% of the surveyed extension officials with knowledge of the importance of behavioral management skills ranging from medium to low. The results showed that there is a positive correlation at the probability level 0.01 between the degree of knowledge and each of the independent variables (extension training, the degree of motivation of achievement, and the degree of knowledge in extension communication). There is a positive correlation at the probability level 0.05 between the degree of knowledge and the independent variable of job satisfaction, whereas there is no correlation between degree of knowledge and independent variables (indicative experience, number of years of education, multiple sources of information, and degree of benefit from training). The researchers are recommending to; increase behavioral management skills training for extension workers in order to develop their skills. The extension workers selection should base on the experience, high level of education, high skills in counseling communication, team formation, time management, possess the motivation of achievement and high job satisfaction.
Bibliometric analysis and research progress of Mu Us Sandy Land soil biological crust based on CNKI
Authors: Shi Chendi , Wang Jian , Yang Chenxi 
Published: May 2021

Abstract
Based on CNKI data, this paper analyzes the number of papers, keywords and research content of biological soil crusts in the Mu Us Sandy Land. It was reviewed that the effects of biological soil crust on water infiltration, photosynthesis, respiration and succession characteristics and the influence of the technology of the compound soil of feldspathic sandstone and sand to create land on the development of biological crusts is considered in the Mu Us Sandy Land. The increase in clay content will significantly promote the expansion of sand biological crusts. At the same time, it is recommended to further carry out research on the development and succession characteristics of sand biological crusts after compounding of feldspathic sandstone and sand.
Study on Evaluation Index of Anti-skid Performance of GAC-16 Asphalt Pavement Based on Temperature Correction
Authors: Fan Qian , Xu Xinquan , Chen Chupeng , Liu Feng 
Published: May 2021

Abstract
Based on the study of temperature correction of british pendulum number (BPN) of GAC-16 asphalt mixture, the correlation between sideway force coefficient (SFC), british pendulum number (BPN) and mean texture depth (MTD) is studied. And the international friction index (IFI) calculated by different indexes is compared and analyzed. The result shows that the dry surface temperature is preferred for the temperature correction of the BPN of GAC-16 asphalt mixture. When conditions do not permit, such as rain weather, the temperature correction of the BPN may be considered by using the wet surface temperature. There is a good linear correlation between the SFC and the BPN. In the section where it is not convenient to test the SFC, the BPN can be used for the preliminary determination of the SFC. It is suggested to use the IFI calculated by the “MTD + BPN modified by the dry state surface temperature” to comprehensively evaluate the anti-skid performance.
Research on prediction of cement-soil cohesion based on strength test
Authors: Zhang Rui , Wu Sanmeng , Cao Yupeng , Guo Zhiqing 
Published: May 2021

Abstract
In order to accurately predict the cohesive of cement-soil and better reflect the shear strength of cement-soil, through indoor strength tests and theoretical analysis, the influence of cement mixing ratio on shear strength and unconfined compressive strength is discussed. In the commonly used cement mixing ratio range (5%-30%), prediction formula of cohesive and unconfined compressive strength is proposed. The cohesive prediction model based on cement mixing ratio and age is further established. The results show that the unconfined compressive strength and cohesive strength of cement-soil increase with the increase of cement mixing ratio and curing age. There is a good linear relationship between cohesion and unconfined compressive strength. Based on nonlinear regression analysis, the prediction model of cohesive under the influence of multiple factors fits well with the test results.
Analysis on Attenuation Law of Skid Resistance Performance of Asphalt Pavement with Thin Overlay
Authors: Fan Qian , Chen Chupeng , Liu Feng , Zheng Hongrou 
Published: May 2021

Abstract
In order to study the attenuation law of skid resistance performance of asphalt pavement with thin overlay, the long-term tracking observation of the scrim force coefficient and the analysis of the attenuation change law were carried out on the asphalt pavement with AC-10 and OGFC-10 thin layer overlay. The volume index, water stability and high temperature stability were tested. The results show that, the attenuation law of the scrim force coefficient of OGFC-10 and AC-10 thin overlay asphalt pavement conforms to the Asymptotic model, showing a trend of rapid decrease first and then stability. It is recommended that “the value of stable scrim force coefficient” and “the time to reach the value of stable scrim force coefficient” should be used as the evaluation index of long-term skid resistance performance of asphalt pavement. The stability value is taken as the first evaluation index of asphalt pavement skid resistance performance, and the time to reach the stability value is the second evaluation index. Considering “the initial scrim force coefficient value”, “the stable scrim force coefficient value”, and “the time to reach the stable scrim force coefficient value”, the skid resistance performance of OGFC-10 thin layer overlay asphalt pavement is better than AC-10 thin layer overlay asphalt pavement.
Fracture characteristics and formation mechanism of Gaoliu structural belt in Nanpu depression
Authors: Yang Jingxu , Cong Peng , Hou Lixin 
Published: May 2021

Abstract
The deep fault system of Gaoliu structural belt in Nanpu depression is complex, especially the joint part of Gaobei and Gaoliu faults. Because of its close proximity to large faults and the poor quality of seismic data, the reliability of structural interpretation is low, which has long affected the development of oil fields. In order to verify the deformation process and genetic mechanism of Gaoliu structural belt, this study obtains a new understanding by selecting typical sections of Gaoliu structural belt to carry out structural physical simulation experiments: the normal fault trending NE and tilting NNW is the reverse extensional fault controlled by the Bogezhuang and Xinanzhuang faults, which formed in the early stage (Shahejie stage) of tension; Gaobei fault and Gaoliu fault It is a normal fault formed in the late stage of extension, which is in the same direction with the main boundary faults such as Bogezhuang and Xinanzhuang faults. It cuts the early reverse normal faults and controls the sedimentation of the strata after the Dongying Formation to different degrees.
Summary of Domestic Research on the Linkage of Increase and Decrease of Construction Land
Authors: Qi Li , Siqi Liu 
Published: May 2021

Abstract
With the rapid development of industrialization and urbanization, China has officially entered a period of rapid urbanization. The characteristics of my country’s existing land resources are that there are more people and less land, and the per capita arable land is insufficient. This has made the protection of the red line of 1.8 billion mu of arable land in my country precarious. In the face of this situation, the policy of linking the increase and decrease of urban and rural construction land has emerged. This article summarizes the domestic research and trends on the increase and decrease of urban and rural construction land, aiming to provide a basis for further scientific research.
Characteristics of VOCs Emission Components in Typical Solvents Source Industries in Tianjin
Authors: Liu Zhenyu , Cao Ziqing , Zhao Jirui , Fang Yumei , Wei Wei 
Published: May 2021

Abstract
Based on the demand for volatile organic compounds (VOCs) emissions controlled in Tianjin, VOC emissions compositions from four typical solvent use industries (automobile painting, furniture painting, wood-based panel manufacturing, Packaging & Printing) were measured by field sampling and analysis, the influence of different treatment facilities on VOCs composition and the ozone formation potentials (OFP) of species were analysed. The results showed that the major VOCs emissions species were aromatics and oxygenated VOCs. Among all waste gas treatment facilities, the catalytic combustion system could reshape the VOCs profile from different industries, and which made the proportion of ethylene increased from 5.81% to 28.30%. Aromatics had a great influence on OFP. The VOCs species with the largest OFP contribution was m/p-xylene, which contributed 16.36% of the total OFP.
Analysis of Denoising Methods of Underwater Acoustic Pulse Signal Based on Wavelet and Wavelet Packet
Authors: Peng Yan , Chen Kejian , Huang Wei , Xiao Xiu , He Jianfeng , Xiao Ke 
Published: May 2021

Abstract
Underwater acoustic countermeasures include active sonar countermeasures and passive sonar countermeasures. In order to achieve the best operational efficiency of jamming equipment, the generation of jamming signals must adapt to the development trend of underwater acoustic detection technology-nonlinear time-varying and broadband characteristics. Feature extraction is to map the high-dimensional original data to the low-dimensional transformation space through a certain mapping relationship, which can suppress a large amount of redundant information in the data and highlight the category information of the data. One of the applications of wavelet analysis in signal analysis and processing is to remove noise components from signals. In practical engineering applications, sampled signals are inevitably polluted by various noises and interferences. Through the analysis of noise characteristics, it can be seen that the wavelet denoising method is very effective in removing signal noise. In this paper, aiming at the signals with different spectrum distribution, we use various methods to de-noise in order to find the de-noising methods suitable for underwater acoustic pulse signals with different frequency characteristics, and thus find an effective means to detect signals.
Ultra-short-term Photovoltaic Power Prediction Based on VMD-LSTM-RVM Model
Authors: Wang Su , Wei Leifeng , Zeng Liang 
Published: May 2021

Abstract
Aiming at the randomness and obvious fluctuation of photovoltaic power, this paper proposes a method that combines Variational Modal Decomposition (VMD), Long Short-Term Memory (LSTM) network and Relevance Vector Machine (RVM) to achieve ultra-short-term photovoltaic power prediction. Firstly, the VMD decomposition technology is used to decompose the historical photovoltaic power sequence into different modes to reduce the non-stationarity of the data; then an LSTM prediction model is established for each mode, and the modal prediction values are reconstructed to obtain the power prediction value; in order to further improve the prediction accuracy of the model, the error sequence is modeled and predicted by RVM; finally, the prediction power value and the prediction error value are superimposed to obtain the final prediction result. Simulation results show that this method effectively improves the accuracy of photovoltaic power prediction.
Single site anchored BiOBr nanosheets for visible-light-driven CO2 Reduction
Authors: Yibo Feng , Zhiming Sun , Cong Wang 
Published: May 2021

Abstract
Carbon dioxide (CO2) reduction is important for enviormental protection, reducing climate warming trends and energy conversion and storage. Photocatalytic CO2 reduction reaction (CO2RR) in visible light is a highly important green route for this target. The variation of active sites on vairous semiconductor have been extensively studied. Exploring new routes for CO2RR is highly desired. Herein, we successfully loaded single tungsten atomic oxide (STAO) on BiOBr substrate. A visible-light-driven photocatalytic CO2RR is achieved by STAO/BiOBr, and the stability has been realized. The CO production of STAO/BiOBr was more than one time larger than that of bare BiOBr and CH4 is also realized. The photo-electric performance of STAO/BiOBr is much different with that of bare BiOBr. By investigating the active sites on single site anchored BiOBr base, the single sites of tungsten played as reductive active sites for CO2 to replace Bi atoms on bare BiOBr. This study sheds lights for photocatalytic CO2RR by single atomic sites through single metallic atom oxides.
Preparation of NiFe-LDHs Adsorbent and Its Adsorption to Methyl Orange
Authors: Zhang Xiang , Jiang Chenyong , Wang Ruoxuan , Qian Shuyun , Tang Ye , Zhuang Wenchang , Xu Yan 
Published: May 2021

Abstract
The Ni-Fe-LDHs adsorbent with different molar ratio of Ni/Fe was synthesized with Ni(NO3)2 and Fe(NO3)3 serving as the resource of metal ions and the ammonia water serving as the precipitant. The methyl orange (MO) was chosen to simulate the dye wastewater to study the adsorption ability of different adsorbent to MO. And XRD, FT-IR and BET were employed to characterize the prepared adsorbents. The experimental results show that LDHs with well crystalline structure can be obtained when the mole ratio of Ni/Fe of 2.3~4. The Ni4Fe adsorbent with the Ni/Fe molar ratio of 4 shows the largest adsorbing capacity of 168.4 mg/g to MO. The XRD results of the spent adsorbent show that the LDHs structure was not destroyed. And the BET result of the fresh Ni4Fe adsorbent proves that it is possessed with microstructure with the surface area of 125.325 m2/g.
Review on the research progress of physical remediation technology for organic contaminated sites
Authors: Shi Lei , Yang Liangyan 
Published: May 2021

Abstract
There are many kinds of organic matter in organic contaminated soil, which has great safety hidden danger to ecological environment and human health. Due to the rapid development of industry and agriculture in our country, a lot of organic contaminated sites to repair, but the restoration of soil governance in China started relatively late compared to the United States and other developed countries, for a wide variety of organic pollution factor pollution soil remediation technology is relatively backward, under the severe form of soil restoration, the organic pollution of soil restoration got the attention of many researchers. This paper reviews the current remediation technologies for organic contaminated soil, including bioremediation, physical remediation and chemical remediation. The technical principles of various remediation technologies were analyzed, and their advantages and disadvantages were summarized based on the current situation of remediation of contaminated soil. The application prospect of organic contaminated soil remediation technologies was prospected, which provided a basis for the remediation of organic contaminated soil in China in the future.
State of the Art Review on Statistical Modelling and Optimization of Bioenergy Production from Oil Seeds
Authors: Ogunkunle O. , Ahmed N. A. 
Published: May 2021

Abstract
The article captures a brief state-of-the-art encompassing statistical modelling and optimization of bioenergy production from oil seeds. Exploring the research space of bioenergy production from biomass oil, various numerical approaches have been employed to model and optimize the process parameters for maximum response yields. Various performance studies have also been carried out to evaluate the predictive capabilities of emerging Artificial intelligence (AI) algorithms on modelling of bioenergy production from seed oil using the conventional Response Surface Methodology (RSM) as a reference base. For the records, the precision of measurement, management of uncertainties, more accurate data analysis and prediction are techniques which these methodologies have the capacity to do. The commonly used techniques for optimization and modelling studies of bioenergy from biomass oil and the analysis of their usage according to their performance metrics are detailed in the body of this work. Aside the relative limitation of RSM models in highly non-linear processes as compared to the robustness of AI models, RSM models still continue to hover on large scale applications when it comes to modelling and optimization studies on bioenergy production from oil-rich plant seeds. In the era of big data analysis in relation to the test and measure of analytical performances and prediction ability, AI models have begun to gain attention in the last two decades owing to their better estimation capabilities and ability to handle more data points in real-time prediction of bioenergy production. This study has been able to show successful applications of both RSM and AI models in bioenergy field, with a pointer to further adoption of the later in more related studies as a result of its relative advantages.
Comparative Study of Microstructure Evaluation and Mechanical Properties of Titanium Alloy Grade 5 Composite Via Laser Metal Deposition
Authors: Akinlabi E.T. , Fatoba O.S. , Akinlabi S.A. , Naidoo LC. , Odebiyi O.S. 
Published: May 2021

Abstract
The implementation of A.M processes in manufacturing is sustainable since it provides higher efficiencies, accuracy and minimal material waste compared to conventional manufacturing methodologies. The investigation of this research was carried on Titanium alloy base metal with Ti-Al-Si-Cu reinforcements. The deposition process was conducted employing a 3kW (CW) Ytterbium Laser System (YLS-2000-TR) machine, coaxial to the reinforcement powder. The laser scanning speed and power were varied between the intervals of 1-1.2 m/min and 900-1000 W. All other parameters kept constant where the rate of gas flow, the spot diameter, and the rate of powder flow. The mechanical property such as ultimate tensile strength was determined for all specimens conducted. The microhardness values were obtained by performing Vickers hardness tests on the metallurgical prepared surfaces. All the samples were observed under an Optical Microscope (OM) to perform microstructural analysis. Optical microscopy and Scanning Electron Microscopy (SEM) were used to determine the metallurgical evolution in the fabricated specimens and the geometrical properties. It was observed that all the samples produced by the LMD technique showed several layering of prior β grains that grew in the direction parallel to the deposition direction. This was caused by the layers being repetitively melted. Specimens produced with densities of energy deposition in regions of a complete fusion and melting resulted in the roughness of the surface and hardness being uniform. Varying the scan speed and laser power supported the generation of columnar grains. The columnar structures are compact and are small in width attributing to the dominance of the diameter of the laser and space of the hatching on the grain size of the columnar structures. Micro-hardness analysis showed that the average hardness of the Ti-6Al-4V substrate was approximately 358HV and the improved hardness was 528HV which was found within the coating at a laser scan speed of 1.2 m/min and laser power of 900 W. It is evident that all the specimens had increased microhardness, in comparison to the parent material, other than samples 4B. Sample 5B displayed the most increase in microhardness of 32.20%, which is the sample with the highest microhardness of 528 HV.
Optimization of bleaching of Crude Palm oil using Activated Groundnut Hull
Authors: Ojewumi M.E. , Ezeocha C.R. , Alagbe E.E. , Obanla O.R. , Omodara O.J. 
Published: May 2021

Abstract
The bleaching process is a crucial process in palm oil refining in which an adsorbent is majorly used to adsorb the unwanted colour pigments and a wide range of other impurities. Groundnut hull was collected and processed into powder form as Groundnut hull powder [GHP], the powder was used to remove the colour pigments and other minor impurities from crude palm oil. Free fatty acid (FFA) analysis was carried out on the palm oil before and after bleaching. The effects of three factors: temperatures, mass and time were investigated on the response. Central Composite Design [CCD] employed resulted in 20 runs. The conducted analysis has shown that groundnut hull was able to reduce FFA composition as well as reduce the colour of the palm oil to a desired colour.
Study on the Potential Rare Earth Elements in Coal Combustion Product from Banjarsari Power Plant, South Sumatera
Authors: Firman  , Haya A 
Published: May 2021

Abstract
Coal combustion produt (CCP) from Banjarsari power plant, both fly ash and bottom ash are numerous and have not been utilized optimally. CCP contains rare earth elements so that the potential needs to be assessed as a resource and reserve of rare earth elements (REE) in the future. The stages of this research were sample preparation and testing of grain size distribution using the wet and dry sieving method. Grain morphology was observed under a microscope and the determination of mineralogical content with XRD, oxide content with XRF and elemental content with ICP-MS. Fly ash grain size distribution of 76.15% passed 200 mesh sieve (0.074 mm) while the bottom ash was only 0.2%. Grain morphology is sub-rounded and there are still coal that has not been completely burned. The dominant mineral content is quartz, mica mineral (muscovite), clay mineral (kaolinite), lime, siderite, magnetite and hematite. The dominant oxides are SiO2, Al2O3, Fe2O3 and CaO. Based on ICP-MS test results, 16 elements of REE were detected. The total REE contents for each sample, FA and BA were 264.97 ppm and 49.22 ppm, respectively. REE of CCP from Banjarsari power plant which has the potential to be extracted is the content of cerium 80.5 ppm, neodymium 42.9 ppm, yttrium 41.8 ppm and lanthanum 31.4 ppm from fly ash while at the bottom ash there is no potential to be extracted.