Physical Sciences and Mathematics Commons^™

Influence Of Cutting Date On The Protein Quality Of Forage Legumes In The Autumn Regrowth, M. Gierus, J. Kleen, Friedhelm Taube

IGC Proceedings (1993-2023)

No abstract provided.

Voluntary Intake And Digestibility In Horses: Individual Variability In The Effect Of Forage Quality, N. Edouard, G. Fleurance, W. Martin‐Rosset, P. Duncan, J. P. Dulphy, S. Grange, R. Baumont, H. Dubroeucq, F. J. Pérez‐Barbería, I. J. Gordon

IGC Proceedings (1993-2023)

No abstract provided.

Effect Of Essential Oils Used As Inoculants On The Nutritive Value Of Barley Silage, A. V. Chaves, J. Baah, W. Z. Yang, T. A. Mcallister, C. Benchaar

IGC Proceedings (1993-2023)

No abstract provided.

Influence Of Sprinkler Irrigation On The Chemical Composition Of Brachiaria Brizantha Cv. Mg 5 Grazed By Crossbred Nelore Steers Under Rotational Grazing System, Rita De Cássia Ribeiro Carvalho, José C. Pinto, Wellington W. Rocha, Joel Augusto Muniz, Patrick Hübner Braga Nunes, Carla Luiza Da Silva Ávila

IGC Proceedings (1993-2023)

No abstract provided.

Assessment And Answer Key, Center For Urban Resilience

Module 05: Public Health & Water Quality

No abstract provided.

Exogenous Transcription Factors Alter The Patterns Of Condensed Tannin Accumulation In Lotus Corniculatus, Sergio Arcioni, F. Damiani, F. Paolocci

IGC Proceedings (1993-2023)

No abstract provided.

Bromatological Characteristics Of Sugarcane Silages Inoculated With Lactobacillus Buchneri, José C. Pinto, Carla Luiza Da Silva Ávila, H. C. P. Figueiredo, A. R. Morais, Odilon G. Pereira, R. F. Schwan

IGC Proceedings (1993-2023)

No abstract provided.

Microbiological Profile Of Sugarcane Silages Inoculated With Lactobacillus Buchneri, José C. Pinto, Carla Luiza Da Silva Ávila, H. C. P. Figueiredo, A. R. Morais, Odilon G. Pereira, R. F. Schwan

IGC Proceedings (1993-2023)

No abstract provided.

Progress In Silage Research In Relation To Animal Production And Food Safety, N. Nishino

IGC Proceedings (1993-2023)

No abstract provided.

Forage Conservation In Tropical Zones: Potential And Limitations Of Grass Silages In South America, Luiz Gustavo Nussio, José Leonardo Ribeiro

IGC Proceedings (1993-2023)

No abstract provided.

Impact Of Solid Waste On Groundwater Quality In Selected Dumpsites In Akwaibom State, Nigeria Using Resistivity And Hydrochemical Data, Abraham Christopher Udoh, Augustine Ifeanyi Chinwuko, Ajana Godwin Onwuemesi, Emmanuel Kenechukwu Anakwuba, Augustine Oyonga Oyonga, Ayatu Ojonugwa Usman

Bulletin of the Mineral Research and Exploration

This study examines the impact of solid waste on groundwater quality around three municipal dumpsites in AkwaIbom State, Nigeria using resistivity and hydrochemical data. Thirty vertical electrical soundings and ten electrical resistivity tomography data were acquired across the area using Schlumberger array. The resistivity data which were analyzed with the aid of IPI2WIN software formed the input data for estimating and modeling leachate parameters. Twelve groundwater samples collected around the area were analyzed for physico-chemical parameters using Atomic Absorption Spectrometer (AAS). The leachate parameters computed from resistivity interpretation across the area show thickness (2 to 56 m); hydraulic conductivity (6.19 …

Identification And Analysis Of Massive Galaxies With High Star Formation Rate, Andrew Guillory

Honors Capstone Projects and Theses

No abstract provided.

New Mathematical Model And Key Parameters Of Capillary Pressure Curves Of High-Rank Coal Samples, Chen Ke, Tang Lei, Yin Chao, He Wei, Zhang Wei, Quan Zheng

Coal Geology & Exploration

Capillary pressure is an important parameter that affects the occurrence and development of coalbed methane. In order to establish an effective mathematical model to characterize capillary pressure curves of high-rank coalbed methane reservoirs, coal samples from No.3 coal seam in southern Qinshui Basin was taken as the research object, high-pressure mercury intrusion experiments were carried out, and the adaptability of the typical mathematical models of the capillary pressure curve currently in common use are systematically evaluated. Then a new mathematical model with higher fitting degree for high-rank coal is established. The results show that capillary pressure curves of 6 coal …

Optimization On Particle Size Fraction Of Lightweight Coated Ceramsite Proppant In Coal Reservoir, Chang Xiaoliang, Lyu Runsheng, Wang Peng, Li Bing, Gao Lin

Coal Geology & Exploration

Hydraulic fracturing is currently one of the main technical measures for enhancing coal reservoirs permeability. The spreading range and transportation distance of proppants in the fracture is an important indicator of hydraulic fracturing to evaluate fracturing effect. According to the characteristics of coal reservoirs in Lu’an mining area, physical experiments and numerical simulation methods are used to compare and analyze the effects of fracture conductivity, sand spreading range, particle size combination and other factors on conductivity of coalbed methane wells, and the best proppants particle size and particle size ratio are selected. The research results indicate that the fracture conductivity …

Multi-Level Fuzzy Mathematics-Based Comprehensive Evaluation Model Of Cbm Well Productivity, Feng Yulong, Zhou Linyuan, Wang Qian, Liu Chengrui

Coal Geology & Exploration

To accurately predict the productivity of CBM wells, a multi-level fuzzy mathematics method was used to establish a comprehensive evaluation model including 3 secondary evaluation parameters(i.e. resource conditions, development conditions, and transformation processes) and 10 tertiary evaluation parameters. Combined with the data of reservoir parameters and stimulation technologies of 15 coalbed methane target blocks in China, the comprehensive evaluation work was carried out using the model. Finally, the actual production of each block was collected to verify the evaluation results, and the corresponding relationship between the evaluation results and the production was obtained. The results show that, the average daily …

Progress Of Coal Fines Agglomeration And Settlement Mechanism Based On High Efficiency Coalbed Methane Drainage, Li Yong, Han Wenlong, Wang Yanbin, Meng Shangzhi, Wu Xiang, Wang Zhuangsen, Ma Zhentao, Liu Du, Zhao Shihu

Coal Geology & Exploration

Significant low-yield and inefficient wells seriously hinder the development of China’s coalbed methane (CBM) industry, and the coal fractures and production pipes blocking caused by the coal fines settlement are the key influencing factors. This paper systematically investigates the latest research progress in the composition, generation mechanism, suspension transport and output control of coal fines produced by coalbed methane wells at home and abroad, summarizes the control mechanism and key issues of coal fines agglomeration-settlement and dispersion behavior, and proposes research prospects. The coal fines problem accompanies the entire process of CBM exploration and development, involving all aspects of geological …

Study On Mesozoic Magmatic Intrusion And Paleozoic Multi-Mineral Genesis Mechanism In Huanghebei Coalfield，Shandong Province, Wang Huaihong, Shen Lijun, Wang Dongdong, Zhu Yuzhen, Li Zengxue, Wang Yongjun, Mao Qiang

Coal Geology & Exploration

Accumulation of various minerals is common in strata, especially in areas invaded by magma, which is more conducive to the generation and preservation of various minerals and greatly improves the exploration benefit and development value of mineral resources. Taking Huanghebei Coalfield in Shandong Province as an example, this paper studies the genesis mechanism of Mesozoic rock intrusion and Paleozoic multiple minerals(coal, coal-bed methane, coal-measure shale gas and rich iron ore). Research shows that: Huanghebei Coalfield Carboniferous-Permian Period tectonic conditions and sedimentary environment are conducive to the development of coal seam, and coal seam distribution in the plane is characterized by …

Prediction Of Coal Seam Gas Content Based On Abc-Bp Model, Zang Zijing, Wu Haibo, Zhang Pingsong, Dong Shouhua

Coal Geology & Exploration

It is valuable to exploit the coalbed-methane which is rich in our country. The prediction of gas content in coalbed methane reservoir is a key step in the early stage of development and utilization. In recent years, BP neural network algorithm has been often used in coalbed methane prediction, but the model has some shortcomings in the training process, such as slow convergence speed, sensitive to initial value and easy to fall into local minimum value. Therefore, this paper proposed an improved BP neural network prediction model characterized by artificial bee colony algorithm. Firstly, R-type cluster analysis was used to …

Long-Term Heat Transfer Performance Of Underground Coaxial Heat Exchanger For Medium-Deep Geothermal, Li Fengcui, Han Ershuai, Liang Lei, Wu Jing'an, Lu Bingxue

Coal Geology & Exploration

Underground coaxial heat exchanger(UCHE) for medium-deep geothermal has the characteristic of the high heat transfer capacity and outlet water temperature, so it has attracted great attention in the heating industry. However, the current research mainly focus on the heat transfer performance of the UCHE during a single heating period, with insufficient analysis on the long-term heat transfer performance. In this paper, considering the operation characteristics of heat supply in heating season and stopping working in non-heating season for underground coaxial heat exchanger for medium-deep geothermal, a numerical heat transfer model is proposed based on the energy conservation equation. The numerical …

Research On The Grouting And Setting Pressure Of The Automatic Hole Sealing Device In Underground Coal Mine, Li Chengcheng, Wang Yi, Wang Li, Duan Huijun

Coal Geology & Exploration

Grouting pressure and setting pressure are the main parameters for designing an automatic hole sealing device in coal mine, and they are also the important basis for the design of automatic hole sealing construction. Based on the radial sealing range of the slurry, the paper analyzes the sealing effect under different slurry pressure conditions by means of theoretical calculation and numerical simulation. Combined with the mechanical characteristics of the rubber Mooney-Rivlin model, extrusion seal and other principles, the optimal injection pressure and setting pressure are studied and determined. The results show that the radial sealing range of the slurry at …

Discussion On Roof Water Loss Control Method Of Coal Seam Based On Pre-Splitting Grouting Reformation(P-G), Zhao Chunhu, Wang Hao, Jin Dewu

Coal Geology & Exploration

In view of the technical requirements of roof water disaster prevention and water resources collaborative protection faced by coal mining in western coal mining area, this paper puts forward a technical idea of roof water loss control based on pre-splitting grouting reformation(P-G) according to the strain strength theory of material mechanics and the statistical results of mining fracture zones of different overburden types. The basic principle is that the continuous bedrock layer will be fractured into discontinuous rock layers by fracturing technology, and by weakening the “tip effect” of upward expansion of mining induced water flowing fracture in hard rock …

Fracture Feature Recognition Of Sandstone After High Temperature Based On Ra/Af, Ge Zhenlong, Sun Qiang, Wang Miaomiao, Zhao Chunhu

Coal Geology & Exploration

It is of great significance to carry out the research on rock high temperature damage information identification for geothermal development and underground coal gasification. Based on the changes of acoustic emission parameters RA and AF in the failure process of sandstone after different high temperature treatments, the development and evolution law of different types of cracks in sandstone after high temperature treatment are studied. The results show that tensile cracks are dominant in the whole loading process of sandstone. When the loading stress exceeds 80% of the peak stress, the proportion of shear cracks increases rapidly, which can be regarded …

Development Of Deep Geothermal Energy And Its Influence On Geothermal Water Flow Field: Taking The Development Of Deep Geothermal Energy In Lankao County For An Example, Song Qianjin, Wang Gang, Xu Yichuan, Cheng Lei

Coal Geology & Exploration

In order to study the influence of deep geothermal energy development on the flow field of thermal reservoir, deep geothermal energy development in Lankao County is selected as the research object. The geological structure and regional structure of the study area since Cenozoic are analyzed, and the of geothermal exploitation and existing problems in the area are investigated. According to the types of geothermal energy, the characteristics of the Quaternary(Q), Neogene Minghuazhen Formation(N₂) and Neogene Guantao Formation(N₁) are analyzed. The conditions of fault distribution, thermal reservoir development and water-resisting boundary in the area are found out …

Patch Testing With Aluminium Finn Chambers Could Give False-Positive Reactions In Patients With Contact Allergy To Aluminium, Lisbeth Rosholm Comstedt, Jakob Dahlin, Magnus Bruze, Yolanda S. Hedberg, Mihály Matura, Cecilia Svedman

Chemistry Publications

Background

Earlier laboratory studies have shown that sodium tetrachloropalladate, Myroxylon pereirae, caine mix II, and palladium chloride trigger the release of aluminium (Al) from Finn Chambers (FC).

Objectives

To investigate whether aluminium realease from FC could influence the diagnostic outcome of patch testing with FC.

Method

A retrospective analysis of patch test results from 2010 to 2019 was performed. A two-sided Fisher's exact test was used to calculate any overrepresentation of contact allergy to Al among patients with positive reactions to sodium tetrachloropalladate, Myroxylon pereirae, caine mix II, and palladium chloride.

Results

A total of 5446 patients had been tested …

Evaluation Of The Development Potential Of The Coalbed Methane Resources In Mining Area Based On Ahp-Entropy Method, Jia Zhichao, Huang Huazhou, Huang Shaobo, Zhou Yu, Wang Bo

Coal Geology & Exploration

The development of coalbed methane(CBM) in mining area is conductive to the efficient mining of pressure relief CBM in mining panels, and it reduces the risk level of underground gas. However, the difference in geological and coal mining conditions makes the development effect of surface wells quite different. Therefore, it is of guiding significance to evaluate the pre-mining panel selection. In order to explore an efficient selection method of CBM in mining areas, a complete evaluation system of CBM development potential in mining area is established by building one vote veto system and evaluation index system, combining analytic hierarchy process(AHP) …

Geochemical Characteristics And Genesis Of Coalbed Methane In Baode Area, Li Yangbing, Zeng Lei, Hu Weiqiang, Chen Xin, Ma Litao, Liu Cheng, Huang Ying, Qiao Fang

Coal Geology & Exploration

In order to find out the geochemical characteristics and origins of coalbed methane(CBM)in Baode area, coal, CBM and water samples were collected, gas component analysis, quality detection of CBM well-produced water and stable isotope analysis were carried out. The results show that CH₄ is the main hydrocarbon gas in CBM composition and its volume fraction ranges from 88.60% to 97.59%; a small amount of ethane is contained, and the volume fraction is only 0.01%-0.14%. The drying coefficient is greater than 0.99, the CBM belongs to the extremely dry CBM. The non-hydrocarbon components mainly contain CO₂ and N_{2 …}

Characteristics Of Shale Gas Reservoir In Upper Paleozoic Coal Measures In Yangquan Block, Qinshui Basin, Li Yangyang, Li Xianqing, Zhang Xueqing, Xiao Xianming, Yu Zhenfeng, Wang Baoyu

Coal Geology & Exploration

Shale reservoir characteristics are the basic content of shale gas storage capacity evaluation. In order to explore the properties of high-evolved coal-measures shale gas reservoirs and optimize favorable reservoirs, various experimental methods of rock pyrolysis, X-ray diffraction, scanning electron microscopy, high-pressure mercury intrusion, low-temperature N₂ and CO₂ gas adsorption were applied to the Qinshui Basin. Reservoir characteristics were studied with core samples of coal-measure shale core from the Upper Paleozoic in Yangquan Block. The results show that the Upper Paleozoic coal-measures shale in Yangquan Block of the Qinshui Basin has a high content of organic carbon(average TOC is …

Vegetation Disturbance Analysis In Coal Mining Area With High Ground Water Level Based On Landsat Time Series Ndvi Data, Fang Liangcheng, Chen Yongchun, An Shikai, Xu Yanfei, Yin Mengjie, Li Zhihui, Zhao Ping, Chen Yeyu

Coal Geology & Exploration

The eastern mining area of China is an important coal and grain composite production area. Due to the flat terrain and high underground diving level, most of the subsidence caused by mining is perennial or seasonal water, which causes serious land, ecological and environmental problems. As an important part of the ecological environment in mining area, vegetation has dynamic characteristics due to the external disturbance and the change of environmental factors. The normalized difference vegetation index(NDVI) is a common indicator for remote sensing monitoring of vegetation growth. The analysis based on NDVI time series data can effectively reveal the disturbance …

Analysis Of Geophone Array Method In Low Snr Complex Area Of Ordos Basin, Wang Zhengliang, Xiao Guoqiang, Fu Qunli, Lyu Zhenchuan, Yao Zonghui, Shi Qingyang, Gao Bin, Yi Hongbin, Gao Qiang, Zhang Peng, Hou Jie, Shi Bingcheng, Wang Yanduo, Jiao Guixing

Coal Geology & Exploration

In the northwest of Ordos Basin, there is serious random interference in the complex area, which leads to the low signal-to-noise ratio of seismic data in this area. In order to solve the problem of low signal-to-noise ratio(SNR) of seismic data in this area, a method study of suppressing random interference by geophone array is carried. The influence of random interference on the accurate calculation of NMO correction and static correction, the suppression of interference wave by geophone array, the influence of intra group height difference and array base distance on high frequency of seismic acquisition data are studied, and …

Forward Simulation Of Fault Detection By Transmitting Channel Wave In Thin Alternating Coal Seams, Ma Yanlong

Coal Geology & Exploration

In order to study the feasibility of the fault detection by transmitting channel wave in thin alternating coal seams of southwestern region, a representative area was selected, and a coal mine in Panzhihua Coal Industry Group was selected as the research object. A three-dimensional geological model with three alternating coal seams containing three partings, three partings and faults and without parting was established based on actual geological data. Through the forward simulation and analysis of the characteristics of the wave field and the frequency dispersion of the channel waves of the three dimensional elastic wave, the validity of the amplitude …