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Nonlinear flow numerical simulation of low-permeability reservoir

Journal of Central South University 2012年第7期19卷 1980-1987页

作者：于荣泽卞亚南周舒王楷军吕琦陈朝辉 PetroChina research Institute of Petroleum Exploration&development-Langfang Special Oil development Company of Liaohe Oilfield Company Down-hole Service Company of Xinjiang Oilfield Company Geological Scientific research Institute of Shengli Oilfield Company CNOOC Energy Technology&Service-Oilfield Engineering research Institute

A nonlinear flow reservoir mathematical model was established based on the flow characteristic of low-permeability *** well-grid equations were deduced and the dimensionless permeability coefficient was introduced to describe the permeability variation of nonlinear *** nonlinear flow numerical simulation program was compiled based on black-oil model.A quarter of five-spot well unit was simulated to study the effect of nonlinear flow on the exploitation of low-permeability *** comprehensive comparison and analysis of the simulation results of Darcy flow,quasi-linear flow and nonlinear flow were *** dimensionless permeability coefficient distribution was gained to describe the nonlinear flow *** result shows that compared with the results of Darcy flow,when considering nonlinear flow,the oil production is low,and production decline is *** fluid flow in reservoir consumes more driving energy,which reduces the water flooding *** flow model overstates the reservoir flow capability,and quasi-linear flow model overstates the reservoir flow *** flow ability of the formation near the well and artificial fracture is strong while the flow ability of the formation far away from the main streamline is *** nonlinear flow area is much larger than that of quasi-linear flow during the fluid flow in low-permeability *** water propelling speed of nonlinear flow is greatly slower than that of Darcy flow in the vertical direction of artificial fracture,and the nonlinear flow should be taken into account in the well pattern arrangement of low-permeability reservoir.

关键词： low-permeability reservoir nonlinear flow mathematical model numerical simulation

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Relationship between the rs2241766 ADIPOQ Polymorphism in a black African Population and the Occurrence of Type 2 Diabetes

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American Journal of Molecular Biology 2024年第2期14卷 97-106页

作者： Aude Syntia Mbang Bengone Rosalie Nikiema-Ndong Elisabeth Lendoye Alvine Sibylle Batou Edwige Nnegue Edzo Serge Bekale Daniela Nsame Frédéric Da Dari Félix Ovono Abessolo Department of Chemistry-Biochemistry Faculty of Medicine University of Health Sciences Libreville Gabon Laboratory of research in Biochemistry (LAREBIO) University of Sciences and Technology of Masuku Franceville Gabon Endocrinology Department University Hospital of Libreville Libreville Gabon research Institute of Health Sciences Bobodioulasso Burkina Faso

Background: Type 2 diabetes mellitus (T2DM) is a metabolic disease, characterized by chronic hyperglycemia. This pathology is linked to various genes whose interaction with the environment promotes its development. The aim of this work was to determine the relationship between the rs2241766 (T/G) polymorphism of the ADIPOQ gene with type 2 diabetes in the black population. Material and Methods: This work was a case-control study, involving type 2 diabetics subjects (n = 94) and controls (n = 82). The study took place from September 2022 to September 2023. Patients were recruited in the Endocrinology Department of the Libreville University Hospital Center. Analysis was performed in the Biochemistry laboratory of the University of Health Sciences in Libreville and at the research Institute of Health Sciences of Bobodioulasso. Genomic DNA was extracted using the protocol Qiagen kit and the PCR-RFLP method was used to determine the rs2241766 (T/G) polymorphism of the ADIPOQ gene. Results: Only 2 genotypes were found in this population, the TT genotype and the GT genotype. The proportions were not different between the two groups (p = 0.1095) neither the distribution of G and T alleles (p = 0.1095). On the other hand, the HDL hypocholesterolemia was frequent in subjects with the GT genotype compared to TT heterozygous (51.1% vs 48.9%, p = 0.0280;OR = 0.55 [0.30 - 1.01]). Conclusion: There was no association between the rs2241766 (T/G) variant of the ADIPOQ gene and the occurrence of type 2 diabetes in this population. On the other hand, a relationship between HDL hypocholesterolemia and the GT genotype has been established.

关键词： Type 2 Diabetes Mellitus Polymorphism rs2241766 ADIPOQ PCR-RFLP

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Whole-genome sequencing to detect mutations associated with resistance to insecticides and Bt proteins in Spodoptera frugiperda

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Insect Science 2021年第3期28卷 627-638页

作者： Fang Guan Jianpeng Zhang Huiwen Shen Xingliang Wang Amanda Padovan Tom K.Walsh Wee Tek Tay Karl H.J.Gordon William James Cecilia Czepak Michael Hilary Otim Donald Kachigamba Yidong Wu College of Plant Protection Nanjing Agricultural UniversityNanjingChina CSIRO black Mountain Laboratories Clunies Ross StreetCanberraACTAustralia Escola de Agronomia Universidade Federal de GoiasGoianiaBrazil National Crops Resources research Institute NamulongeKampalaUganda Department of Agricultural research Services(DARS) LilongweMalawi

The fall armyworm(FAW),Spodoptera frugiperda,is a major pest native to the Americas that has recently invaded the Old *** mutations in the target-site proteins acetylcholinesterase-1(ace-1),voltage-gated sodium channel(VGSC)and ryanodine receptor(RyR)have been identified in *** as major resistance mechanisms to organophosphate,pyrethroid and diamide insecticides *** in the adenosine triphosphate-binding cassette transporter C2 gene(ABCC2)have also been identified to confer resistance to Cry IF *** this study,we applied a whole-genome sequencing(WGS)approach to identify point mutations in the target-site genes in 150 FAW individuals collected from China,Malawi,Uganda and *** approach revealed three amino acid substitutions(A201S,G227A and F290V)of *** ace-1,which are known to be associated with organophosphate *** Brazilian population had all three ace-1 point mutations and the 227A allele(mean frequency=0.54)was the most *** from China,Malawi and Uganda harbored two of the three ace-1 point mutations(A201S and F290V)with the 290V allele(0.47-0.58)as the dominant *** mutations in VGSC(T929I,L932F and L1014F)and RyR(I4790M and G4946E)were not detected in any of the 150 individuals.A novel 12-bp insertion mutation in exon 15 of the ABCC2 gene was identified in some of the Brazilian individuals but absent in the invasive *** results not only demonstrate robustness of the WGS-based genomic approach for detection of resistance mutations,but also provide insights for improvement of resistance management tactics in ***.

关键词： Bt resistance insecticide resistance mutation detection Spodoptera frugiperda whole-genome sequencing

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Exploring the shadow of a rotating charged ModMax black hole

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Communications in Theoretical Physics 2024年第2期76卷 89-101页

作者： Khurshid Karshiboev Farruh Atamurotov Ahmadjon Abdujabbarov Ali Övgün Anvar Reyimberganov Institute of Theoretical Physics National University of UzbekistanTashkent 100174Uzbekistan New Uzbekistan University Movarounnahr Street 1Tashkent 100000Uzbekistan Central Asian University Milliy Bog'Street 264Tashkent 111221Uzbekistan University of Tashkent for Applied Sciences Str.Gavhar 1Tashkent 100149Uzbekistan Tashkent State Technical University Tashkent 100095Uzbekistan Ulugh Beg Astronomical Institute Astronomy Street 33Tashkent 100052Uzbekistan Institute of Fundamental and Applied research National Research University TIIAMEKori Niyoziy 39Tashkent 100000Uzbekistan Physics Department Eastern Mediterranean UniversityFamagusta99628 North Cyprusvia Mersin 10Turkey Urgench State University Urgench 220100Uzbekistan

The research presented in this paper discusses the impact that the parameters of charge(Q)and screening factor(γ)have on properties of the horizon and silhouette of rotating charged Mod Max black holes which were reviewed in[***.J.C(2022)82:1155]recently,building upon previous findings in the ***,the study explores the behavior of null geodesics,which can help us better understand the apparent shape of the black hole’s silhouette,as well as the distortion parameter and approximate radii of the silhouette that are influenced by the aforementioned parameters,and there are some values of parameter Q which corresponds to data from the Event Horizon Telescope(EHT).Notably,we explore the distortion parameter and approximate radii of the silhouette,revealing that while an increase inγleads to a growth in silhouette radius(Rs),it simultaneously reduces the distortion rate(δs).Conversely,heightened Q charge results in a reduction of Rsaccompanied by an increase inδ***,the paper analyzes the effects of the black hole’s parameters on the effective potential and energy emission:the peak value of the energy emission rate experiences a decrease as the screening factor(γ)increases,while it increases with higher values of the charge parameter(Q).

关键词： black hole ModMax gravity rotating black hole black hole shadow

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Biochars produced from coconut palm biomass residues can aid regenerative agriculture by improving soil properties and plant yield in humid tropics

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Biochar 2020年第2期2卷 211-226页

作者： Murali Gopal Alka Gupta K.Shahul Hameed Neenu Sathyaseelan T.H.Khadeejath Rajeela George V.Thomas ICAR-Central Plantation Crops research Institute KasaragodKerala 671124India Present Address:Winsome F&D Consultant DubaiUAE Council for Food research and development KonniKeralaIndia

Lignin-rich recalcitrant biomass residues of coconut palms viz.(i)mature coconut husk,(ii)tender(immature or green)coconut husk(iii)coconut leaf petiole and(iv)coir-pith were successfully pyrolysed using a simple charring kiln into carbon-rich,black,light weight and porous *** alkalinity and good ash content made them fit for remediating acid *** potassium content in these biochars could help reduce the use of inorganic *** analysis showed the mass loss phases of husk and coconut leaf petiole biochars to be ***,all four biochars gave smooth curves indicating thermal stability of the *** seed germination and earthworm avoidance tests proved their potential as soil *** incubation studies with coconut biochars in graded doses,alone or in combination with coconut leaf vermicompost,increased the pH,organic carbon and potassium contents,and promoted plant-beneficial microbiota and enzyme *** studies with tender coconut husk biochar and coconut leaf vermicompost enhanced the dry weight of cowpea plants accompanied with increased arbuscular mycorrhizal sporulation and root colonization,and root nodule dry weight.A field trial resulted in higher chilli yields with tender coconut husk biochar+coconut leaf vermicompost *** results from our studies highlight the potential of pyrolysis as an innovative technology for quick recycling of highly recalcitrant coconut palm biomass residues to biochars as a local source of soil amendment to aid regenerative agriculture in humid tropics.

关键词： Coconut husks Biochar Plant-beneficial microbiota Earthworm avoidance Mycorrhizae

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Linear instability of hairy black holes in Horndeski theory

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Chinese Physics C 2024年第7期48卷 253-258页

作者：张超朱涛 Beijing Key Laboratory of Optical Detection Technology for Oil and Gas Basic Research Center for Energy InterdisciplinaryCollege of ScienceChina University of Petroleum-BeijingBeijing 102249China Institute for Theoretical Physics and Cosmology Zhejiang University of TechnologyHangzhou 310023China United Center for Gravitational Wave Physics(UCGWP) Zhejiang University of TechnologyHangzhou 310023China

Horndeski theory constitutes the most general model of scalar-tensor *** has attracted much attention in recent years in relation with black holes,celestial dynamics,stability analysis,*** is important to note that,for certain subclasses of Horndeski models,one can obtain analytic solutions for the background *** facilitates the investigation of the corresponding stability problems in *** particular,we aim to determine the constraints to the model or theory under which the stability conditions can be *** this study,we focused on a subclass of Horndeski theory and a set of analytic background *** addition,the odd-parity gravitational perturbation and 2nd-order Lagrangian were *** careful analysis,the instability was identified within the neighborhood of the event *** allows exclusion of a specific geometry for the *** an instability is implanted in the structure of the corresponding Lagrangian and is not erased by simply adding numerical constraints on the coupling *** a starting point of our research,the current study provides insights for further exploration of the Horndeski theory.

关键词： black holes black hole perturbations scalar-tensor theories Horndeski theory

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Melatonin mitigates cold-induced damage to pepper seedlings by promoting redox homeostasis and regulating antioxidant profiling

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Horticultural Plant Journal 2024年第2期10卷 532-544页

作者： Muhammad Ahsan Altaf Yuanyuan Hao Huangying Shu Weiheng Jin Chuhao Chen Lin Li Yu Zhang Muhammad Ali Mumtaz Huizhen Fu Shanhan Cheng Guopeng Zhu Zhiwei Wang Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province Sanya Nanfan Research InstituteHainan UniversitySanyaHainan 572025China Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province School of HorticultureHainan UniversityHaikouHainan 570228China Hainan Yazhou Bay Seed Laboratory SanyaHainan 572025China

This study assessed the influence of exogenous ME in the mitigation of cold damage in pepper seedlings. Melatonin(ME) is a dynamic molecule that helps plants cope with stress in several ways. Cold stress(CS) is one of the most important environmental factors that restrict plant growth and yield. pepper(Capsicum annuum L.) is a valuable commercial crop, highly sensitive to CS. Thus, identifying an efficient strategy to mitigate cold damage is critical for long-term pepper production. For this purpose, the roots of pepper seedlings were pretreated with ME(5 μmol · L^(-1)) and exposed to CS for 7 d. The results indicated that CS suppressed pepper growth, hampered photosynthetic capacity, and damaged root architecture in pepper plants. In contrast, the production of reactive oxygen species(ROS), malondialdehyde(MDA), electrolyte leakage(EL), proline, and soluble sugars were enhanced in plants under CS. ME(5 μmol · L^(-1)) pretreatment reduced the negative effects of CS by recovering plant growth, root traits, gas exchange elements, and pigment molecules compared to CS control treatment. Furthermore, ME application efficiently reduced oxidative stress markers [hydrogen peroxide(H_(2)O_(2)), superoxide ion(O_(2)^(·-)), EL, and MDA] while increasing proline and soluble sugar content in pepper leaves. ME application combined with CS further increased antioxidant enzymes and related gene expression. Collectively, our results confirmed the mitigating potential of ME supplementation for CS by maintaining pepper seedling growth,improving the photosynthesis apparatus, regulating pigments, and osmolyte content.

关键词： pepper Melatonin Cold stress Antioxidant enzyme Root trait

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Stage-progressive distribution pattern of the Lungmachi black graptolitic shales from Guizhou to Chongqing, Central China

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Science China Earth Sciences 2017年第6期60卷 1133-1146页

作者： CHEN Xu FAN JunXuan WANG WenHui WANG HongYan NIE HaiKuan SHI XueWen WEN ZhiDong CHEN DongYang LI WenJie Key Laboratory of Economic Stratigraphy and Palaeogeography Chinese Academy of Sciences Nanjing Institute of Geology and Palaeontology Nanjing 210008 China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing 210008 China School of Earth Sciences and Engineering Nanjing University Nanjing 210023 China Langfang Branch Research Institute of Petroleum Exploration & Development PetroChina Langfang 065007 China research Institute of Petroleum Exploration & development PetroChina Beijing 100083 China research Institute of Exploration and development Southwest Oil & Gas Field Company PetroChina Chengdu 610051 China Southern Company of SINOPEC Exploration Chengdu 610041 China University of Chinese Academy of Sciences Beijing 100049 China

The Lungmachi Formation is widely distributed in Guizhou, Chongqing and the adjacent area. It is important for the study of Silurian biostratigraphy and shale-gas investigation. Based on those biostratigraphically well-studied sections from Guiyang to Huayingshan, we reveal the stage-progressive distribution pattern of the Lungmachi black shales. The distribution of the Lungmachi black shales in the studying area can be subdivided into four geographic belts from the south to the north,reflecting the joint effect of regional and global environmental changes. The graptolite depth zonation model was adopted herein to infer the water depth of major graptolite assemblages from the black shales. The changes in the water depth indicate two major stages. The first stage is named the transgressive distribution stage which ranged from the Persculptograptus persculptus Biozone(LM1, upper Hirnantian) to the Coronograptus cyphus Biozone(LM5, upper Rhuddanian), an interval mostly controlled by global sea-level rise. The second stage, ranging from the Demirastrites triangulatus Biozone(LM6, lower Aeronian) to the Spirograptus guerichi Biozone(LM9, lower Telychian), is named the regressive shrinking stage, during which the black shales were gradually replaced by mixed-facies or carbonate sediments from the south to the north, representing the effects of the persistent uplifting of the Central Guizhou Oldland.

关键词： Lungmachi Formation black shales Graptolite biozone Graptolite depth zonation Transgressive distribution stage Regressive shrinking stage

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Identification of chemical compounds in agarwood-producing species Aquilaria malaccensis and Gyrinops versteegii

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Journal of Forestry research 2020年第4期31卷 1371-1380页

作者： Arie Aqmarina Nasution Ulfah Juniarti Siregar Miftahudin Maman Turjaman Graduate School of Tropical Silviculture Bogor Agricultural University(IPB)Bogor 16680Indonesia Department of Silviculture Faculty of ForestryBogor Agricultural University(IPB)Bogor 16680Indonesia Department of Biology Faculty of Mathematics and NaturalSciencesBogor Agricultural University(IPB)Bogor 16680Indonesia Forest research and development Center Environment and Forestry ResearchDevelopmentand Innovation Agency(FORDA)Ministry of Environment and ForestryBogorIndonesia

Agarwood is a non-timber forest product found in tropical rain *** is a black and fragrant resin valued for the perfume industry and demand continues to ***,the Indonesian agarwood-producing species,Aquilaria malaccensis and Gyrinops versteegii do not automatically produce such quality ***-induction technology or inoculation using Fusarium solani is usually applied to these species to trigger resin *** research aims to identify agarwood compounds formed in seedlings and trees of *** and *** after these species were inoculated with the fungus *** chemical compounds were identified by comparing the patterns of mass spectra fragmentation in the sample and in previous *** groups of agarwood compounds were identified:(1)sesquiterpen group-cisjasmone and aromadendrenepoxide;(2)chromones group-8-methoxy-2-(2-phenylethyl)chromen-4-one and newly-discovered chromone derivative,7-(benzyloxy)-5-hydroxy-2-methylchromone found only in ***;(3)aromatic group-benzylacetone,guaiacol,p-ethylguaiacol,phenol,syringaldehyde,vanilin,furfuryl alcohol,and furfural;(4)fatty acid group-palmitic acid,oleic acid,and lauric acid;and,(5)triterpen group-squalene.

关键词： Agarwood constituent Aquilaria malaccensis Fusarium solani Gyrinops versteegii

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Test particles and quasiperiodic oscillations around Kiselev black hole with cloud of strings

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Chinese Physics C 2024年第5期48卷 293-308页

作者： Javlon Rayimbaev Uktambek Eshimbetov Bushra Majeed Ahmadjon Abdujabbarov Alisher Abduvokhidov Bakhrom Abdulazizov Akram Xalmirzayev School of Mathematics and Natural Sciences New Uzbekistan UniversityMovarounnahr Str.1Tashkent 100000Uzbekistan School of Engineering Central Asian UniversityTashkent 111221Uzbekistan University of Tashkent for Applied Sciences Str.Gavhar 1Tashkent 100149Uzbekistan Institute of Fundamental and Applied research National Research University TIIAMEKori Niyoziy 39Tashkent 100000Uzbekistan National University of Uzbekistan Tashkent 100174Uzbekistan Ulugh Beg Astronomical Institute Astronomy Str.33Tashkent 100052Uzbekistan Tashkent State Technical University Tashkent 100095Uzbekistan College of Electrical and Mechanical Engineering(CEME) National University of Sciences and TechnologyRawalpindiPakistan Andijan State University Universitet Str.129Andijan 170100Uzbekistan Namangan State University Boburshoh Str.161Namangan 160107Uzbekistan

In the present study,we investigate the dynamics of test particles around a Schwarzschild black hole surrounded by quintessence and immersed in a scalar string cloud *** start our study by defining the possible values of the quintessence and cloud of string parameters corresponding to the existence of the black hole horizon for fixed values of the parameters of the equation of state for dark *** also study the effects of the effective potential on the circular motion,energy,and angular momentum of the test particles together with the innermost stable circular orbits(ISCOs).We investigate the fundamental frequencies in the particle oscillations along stable circular *** relate the stability of the orbits to the Lyapunov exponent,and the chaotic behavior is studied ***,we apply the fundamental frequencies to describe quasiperiodic oscillations(QPOs)and find that,in the presence of both fields,low-frequency twin-peak QPOs are not *** addition,we obtain the constraint values for the string cloud parameter and mass of the black hole candidates located in the center of the microquasars GRO J1655-40 and GRS 1915+105 as well as the Milky Way galaxy.

关键词： quintessential field black holes string cloud quasiperiodic oscillations

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