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Numerical investigation of fluid phase momentum transfer in carbonate acidizing

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Petroleum Science 2022年第2期19卷 639-650页

作者： Cun-Qi Jia Kamy Sepehrnoori hai-yang zhang Yong-Fei yang Jun Yao School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Hildebrand Department of Petroleum and Geosystems Engineering The University of Texas at AustinAustinTX78705USA Petroleum Department Khalifa University127788Abu DhabiUnited Arab Emirates

This work mainly studies the effect of fluid phase momentum transfer mechanisms on the acidizing results,including the retardation effect of the porous structure and the interaction between the fluid phase,such as viscous dissipation and inertial *** results show that the acid fluid momentum transfer is influenced by the complex porous structure and fluid viscous ***,the Stokes-Darcy equation is recommended to be adopted to describe the fluid phase momentum transfer in the following numerical simulation studies of the carbonate acidizing *** on this model,a parametric research is carried out to investigate the impact of acid on rock physical characteristics in the stimulation *** the acid concentration appears to minimize the quantity of acid consumed for the *** acid surface reaction rate has a considerable impact on the pore volume to breakthrough and the optimum acid injection *** influence of permeability on the acidizing results basically shows a negative correlation with the injection *** difference between the acidizing curves of different permeability gradually becomes insignificant with the decrease in injection *** existence of isolated fracture and vug significantly reduces acid consumption for the breakthrough.

关键词： Fluid phase momentum transfer Carbonate acidizing Continuum model Reactive flow simulation

Oral administration of geranylgeranylacetone plus local somatothermal stimulation: A simple, effective, safe and operable preconditioning combination for conferring tolerance against ischemia-reperfusion injury in rat livers

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World Journal of Gastroenterology 2005年第36期11卷 5725-5731页

作者： Ning Fan Guang-Shun yang Jun-Hua Lu Ning yang hai-Bin zhang Department of Laparoscopy Affiliated Eastern Hospital of Hepatobiliary Surgery Second Military Medical University Shanghai 200438 China

AIM： To explore a simple, effective, safe and operable pretreatment for conferring tolerance against ischemia- reperfusion （I-R） injury in rat livers. METHODS： Forty-five rats were divided into five groups （each group n = 9）. Group C： control group; group G： geranylgeranylacetone （GGA） was administered without heat stress; group S： local heat stress alone; group WG： GGA plus whole-body heat stress; group SG： GGA administration plus local heat stress. After completion of the I-R procedure, the ischemic-reperfused liver lobes in five groups were resected and tested for heat shock protein （HSP70） by RT-PCR, Western blotting analysis and immunohistochemical staining. The blood samples were collected for ALT and AST measurement at the end of occlusion of blood supply, 30 min after reperfusion, 24, 48, 72 h after surgery from the inferior vena cava. Survival was monitored for 1 wk. RESULTS： The production of HSP70 after I-R injury increased, the liver enzyme levels after reperfusion decreased rapidly, and the survival rates increased in groups C-SG. CONCLUSION： The combination of GGA plus local somatothermal stimulation is a simple, effective, safe and operable pretreatment to induce HSP70 in patients with liver tumor and cirrhosis before hepatectomy and in donors before harvesting graft for liver transplantation.2005 The WJG Press and Elsevier Inc. All rights reserved.

关键词： Ischemia-reperfusion injury Heat shock protein Geranylgeranylacetone, Local somatothermal stimulation

Parental dependence on the nest's spatial cues in offspring recognition decreases with nestling growth in the azure-winged magpie

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Current Zoology 2020年第6期66卷 643-648页

作者： Li-Fang Gao Wen zhang hai-yang zhang Zhen-Qin Zhu Xiao-Dan zhang Bo Du School of Life Sciences Lanzhou UniversityLanzhou730000China

In altricial birds,to address which cues are used by parents to recognize their offspring,and when they switch between cues during reproduction,it has not been well *** this study,we address this questi on in a Tibetan populatio n of the azure-winged magpie Cyanopica cyan us f by examining the dependence of parents on a nest's spatial position in offspring *** the egg and nestling phases,azure-winged magpie nests were translocated to new positions across various distances from their original site,and parental responses to the translocated nests were *** findings show that a nesfs spatial position is not connected with the survival of its young,but might be used as a cue in parental offspring *** nests are translocated to a new position within a certain distance,parents could recognize their nests and returned to resume their parenting *** dependence on the nest's spatial position in offspring recognition is higher during the egg phase than during the nestling phase,and it decreases with the growth of *** nestlings reach a certain age,the nest's spatial position was no longer used by pare nts as the single cue for offspring recog *** findings suggest that azure-winged magpies switch their cues in offspring recog nition during the differe nt stages of *** parent-offspring communication has been established,the offspring's phenotypic traits may become a more reliable cue than the nests spatial position in offspring recognition.

关键词： homing nest spatial position nest translocation experiment offspring recognition

Analysis of echo signal modulation characteristic parameters on aerial and space targets

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Defence Technology（防务技术） 2023年第10期28卷 146-154页

作者： Si Chen hai-yang zhang Chang-ming Zhao Yu Fan Hong Chen Lin Wang School of Optics and Photonics Beijing Institute of TechnologyBeijing100081China Key Laboratory of Electro-Optical Countermeasures Test&Evaluation Technology Unit 63891 of the Chinese People's Liberation ArmyHenan461002China Key Laboratory of Optical Radiation Beijing Institute of Environmental CharacteristicsBeijing100854China

Based on the scattering characteristic,the comparison of RCS(radar cross-section)at different positions of a target in the same direction of incidence can be obtained first by extruding or deleting part of the entity.A simulation method of aerial&space targets echo characteristics(A&STEC)is proposed that is universal to aerial and space *** utilize a fixed-wing UAV(unmanned aerial vehicle)and typical missiles in *** echo signal modulation characteristic parameters are calculated theoretically by the atmospheric attenuation model,the finite element method and a MUMPS *** verification simulations show that this method can analyze the influence of the target shape,incident direction,detection position and detection frequency on echo waveform,intensity and energy *** results show that the profile of echo waveform can invert the general shape of the *** relationship between time and intensity can determine whether the target is moving towards or away from the detector in *** conclusions can provide a reference for the ballistic missile target tracking and the defense against UVA intrusion in theory.

关键词： Echo signal modulation characteristic parameters Simple targets The fixed-wing UVA Missiles Scattering characteristics

Splenic vasculopathy in portal hypertension patients

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World Journal of Gastroenterology 2006年第17期12卷 2737-2741页

作者： Tao Li Ji-Yuan Ni Yan-Wu Qi hai-yang Li Tong zhang Zhen yang Department of Hepatic Surgery Tongji Hosptal Tongji medical College Huazhong University of Science and Technology Wuhan 430030 Hubei province China

AIM： To investigate the interaction between portal hypertension, splanchnic hyperdynamic circulation and splanchnic vasculopathy by observing splenic arterial and venous pathological changes and the role of extracellular matrix in the pathogenesis of portal hypertensive vasculopathy by measuring the expression of type Ⅰ and type Ⅲ procollagen mRNA in splenic venous walls of portal hypertensive patients. METHODS： Morphological changes of splenic arteries and veins taken from portal hypertensive patients （n = 20） and normal controls （n = 10） were observed under optical and electron microscope. Total RNA was extracted and the expression of type Ⅰ and type Ⅲ procollagen mRNA in splenic venous walls of portal hypertensive patients （n= 20） was semi-quantitatively detected using reverse transcription-polymerase chain reaction （RT-PCR）. RESULTS： Under optical microscope, splenic arterial intima was destroyed and internal elastic membrane and medial elastic fibers of the splenic arterial walls were degenerated and broken. Splenic venous intima became remarkably thick. Endothelial cells were not intact with formation of mural thrombus. The tunica media became thickened significantly due to hypertrophy of smooth muscles. Fibers and connective tissues were increased obviously. Under electron microscope, smooth muscle cells of the splenic arteries were degenerated and necrotized. Phenotypes of smooth muscle cells changed from constrictive into synthetic type. Red blood cells and platelets accumulated around the damaged endothelial cells. Synthetic smooth muscle cells were predominant in splenic veins and their cytoplasma had plentiful rough endoplasmic reticulum ribosomes and Golgi bodies. Along the vascular wall, a lot of collagen fibers were deposited, the intima was damaged and blood components accumulated. There was no significant difference in the expression of type Ⅰ procollagen mRNA in splenic venous wall between the patients with portal hypertension and those without

关键词： Portal hypertension Splanchnic hyperdynamic circulation Splanchnic vasculopathy

Fitness consequences of divorce in the azure-winged magpie depends on the breeding experience of a new mate

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Current Zoology 2021年第1期67卷 17-25页

作者： Li-Fang GAO hai-yang zhang Wen zhang Xiao-Dan zhang Zhen-Qin ZHu Bo Du School of Life Sciences Lanzhou UniversityTianshui South Road 222#Lanzhou CityGansu Province730000China

Sexual conflict in producing and raising offspring is a critical issue in evolutionary ecology *** experience affects their breeding performance,as measured by such traits of provisioning of offspring and engagement in extra-pair copulations,and may cause an imbalance in sexual ***,divorce is hypothesized to occur within aged social pairs,irrespective of current reproductive *** concept was explored in the azure-winged magpie Cyanopica cyanus by investigating the divorce of a social pair and its relationship to their changes in breeding performance with prior *** engaging in extra-pair copulation may intensify sexual conflicts and may be the main reason for *** divorced,females repairing with an inexperienced male realized higher reproductive success than that repairing with an experienced male;males repairing with an experienced female realized higher reproductive success than that repairing with an inexperienced *** finding indicates that the fitness consequence of divorce depends on the breeding experience of new *** females can obtain more extra-pair copulations,whereas divorced males cannot,when they repair with inexperienced *** females provisioned a brood at lower rates than inexperienced females whereas divorced males had no such *** appears that divorced females can obtain an advantage in sexual conflicts with inexperienced mates in future ***,females are probably more active than males in divorcing their aged mates so as to select an inexperienced male as a new ***-winged magpies thus provide novel insights into the implicaticns of sexual conflict in birds.

关键词： breeding experience extra-pair copulation parental care provisioning rate sexual conflict

Coherent Control of the Hartman Effect through a Photonic Crystal with Four-Level Defect Layer

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Communications in Theoretical Physics 2018年第11期69卷 613-618页

作者： Feng-Lian Hu Fazal Badshah Abdul Basit hai-yang zhang Qing He Guo-Qin Ge School of Physics Huazhong University of Science and Technology Quantum Optics Lab.Department of Physics COMSATS Institute of Information Technolgy College of Science Zhongyuan University of Technology

In this paper, we examine the transmission of a probe field through a one dimensional photonic crystal (1DPC) when the sixth layer of the crystal is doped with four level atoms. We analyze effects of the external driving field on the passage of weak probe field across the photonic crystal. It is found that for the phase time delay of the probe photons, intensity of the driving field switches the Hartman effect from sub to superluminal character. It is interesting to note that in our model, the superluminal transmission of the probe pulse is accompanied by a negligibly small absorption of the incident beam. It ensures that the probe field does not attenuate while passing through the photonic crystal. A similar switching of the Hartman effect may be obtained by adjusting detuning of the probe field related to the excited states of the four-level doping atoms.

关键词： phase time delay photonic crystal Hartmann effect superclassicality

Fecal consumption by adults of altricial birds in relation to the temporal change in nestling gut microbiota

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Current Zoology 2020年第6期66卷 689-691页

作者： Li-Fang Gao Wen zhang hai-yang zhang Zhen-Qin Zhu Xiao-Dan zhang Jian-Chuan Li Li-Qing Fan Bo Du School of Life Sciences Lanzhou UniversityLanzhou 730000China Tibet Plateau Institute of Biology Lhasa 850000China Institute of Plateau Ecology Xizang Agriculture and Animal Husbandry CollegeLinzhi CityTibet 860000China

Nest sanitation behavior of altricial birds has been selected to reduce the exposure of young to pathogens,parasites,or predators,and thus to maintain the health and safety of nestlings(Guigueno and Sealy 2012).During the process of nest sanitation,caregivers either carry away the fecal sacs of nestlings or directly eat *** that adults endure higher risk of being infected by pathogens during fecal consumption(Potti et al.2007),it remains a puzzle about why adults consume the nestling feces when they can transport *** hypotheses have been proposed to explain the fecal consumption behavior of altricial birds,including the nutrition hypothesis(Gliick 1988),economic hypothesis(Hurd et al.1991),and predation hypothesis(Ibanez-Alamo et al.2013).

关键词： fecal consumption giant babax gut microbiota

Ferroptosis:A New Target of Cancer Therapy

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Journal of Nutritional Oncology 2018年第1期3卷 14-18页

作者： hai Ou yang hai yang zhang Yi Ba Tianjin Medical University Cancer Institute and Hospital National Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjin’s Clinical Research Center for CancerTianjin 300060China

Ferroptosis is a novel form of regulated cell death distinguished from apoptosis,autophagy and other forms of cell *** is characterized by the iron-dependent accumulation of reactive oxygen species to lethal *** inducers of cell ferroptosis react with glutathione peroxidase or lead to glutathione depletion through diverse pathways to decrease the antioxidant capacity and increase the level of reactive oxygen *** metabolic disorders and the disrupted homeostasis associated with a wide variety of ailments,including cancer,can lead to *** present review provides an overview of the mechanisms underlying ferroptosis,highlights the role of ferroptosis in cancer,and discusses the therapeutic potential of targeting ferroptosis.

关键词： Ferroptosis Cancer therapy GSH ROS