It is an accepted fact that the main solid phase support for potassium in the Sichuan Basin is polyhalite [K2MgCa2(SO4)4·2H2O] rather than sylvineis (KCl) (Gong DX et al.,2015).The mineral types,occurrence charac...It is an accepted fact that the main solid phase support for potassium in the Sichuan Basin is polyhalite [K2MgCa2(SO4)4·2H2O] rather than sylvineis (KCl) (Gong DX et al.,2015).The mineral types,occurrence characteristics and metasomatism of the polyhalite bearing ore-bed were identified and the origin of the polyhalite was discussed.The polyhalite samples were obtained from the core of Z12,located in Dalong Village,Guang'an City of central Sichuan.The sampling depths were 2974 m (s-1),3023 m (s-2) and 3106 m (s-3).The microbeam analysis of back-scattering images was carried out using a Shimadzu EPMA-1720 Series electron probe micro-analyzer,supplemented by a quantitative spectrum analysis that determined the mineral types.展开更多
Polymer microspheres(PMs),such as polyacrylamide,have been widely applied for enhanced oil recovery(EOR),yet with environmental concerns.Here,we report a microfluid displacement technology containing a bio-based eco-f...Polymer microspheres(PMs),such as polyacrylamide,have been widely applied for enhanced oil recovery(EOR),yet with environmental concerns.Here,we report a microfluid displacement technology containing a bio-based eco-friendly material,i.e.,calcium alginate(CaAlg)microspheres for EOR.Two dominant mechanisms responsible for EOR over Ca Alg fluid have been verified,including the microscopic oil displacement efficacy augmented by regulating capillary force(determined by the joint action of interfacial tension and wettability between different phases)and macroscopic sweep volume increment through profile control and mobility ratio reduction.This comprehensive effectiveness can be further impacted when the CaAlg microsphere is embellished ulteriorly by using appropriate amount of sodium dodecyl sulfonate(SDS).The core flooding and nuclear magnetic resonance(NMR)tests demonstrate that CaAlg-SDS microsphere can balance the interphase property regulation(wettability alteration and IFT reduction)and rheology properties,enabling simultaneous profile control and oil displacement.Excessive introduction of SDS will have a negative impact on rheological properties,which is not favored for EOR.Our results show that the involvement of 4-m M SDS will provide the best behavior,with an EOR rate of 34.38%.This cost-effective and environmentally-friendly bio-microspherebased microfluidic displacement technology is expected to achieve“green”oil recovery in future oilfield exploitation.展开更多
The structure of the concave-convex plates has proven to be crucial in optimizing the internal flow characteristics of the electrolyzer for hydrogen production.This paper investigates the impact of the gradual expansi...The structure of the concave-convex plates has proven to be crucial in optimizing the internal flow characteristics of the electrolyzer for hydrogen production.This paper investigates the impact of the gradual expansion angle of the inlet channel on the internal flow field of alkaline electrolyzers.The flow distribution characteristics of concave-convex plates with different inlet angle structures in the electrolytic cell is discussed.Besides,the system with internal heat source is studied.The results indicate that a moderate gradual expansion angle is beneficial for enhancing fluid uniformity.However,an excessively large gradual expansion angle may lead to adverse reflux phenomena,reducing the overall performance of the electrolytic cell.展开更多
Introduction: Spinal cord infarction (SCI) is a relatively rare disease. Abnormality on magnetic resonance imaging (MRI) is an important diagnostic criterion. It may be normal on the first day. Then abnormal signal wi...Introduction: Spinal cord infarction (SCI) is a relatively rare disease. Abnormality on magnetic resonance imaging (MRI) is an important diagnostic criterion. It may be normal on the first day. Then abnormal signal will appear a few days later. There were some reports with negative MRI findings at the beginning. However, those reports were neither found abnormalities on repeat MRI nor without repeat MRI. Case Presentation: We report a case of SCI presented as paralysis of lower limbs and chest pain with no abnormalities on MRI through the course of disease in a 74-year-old female. Anti-platelet aggregation drugs, stabilizing plaque treatments and rehabilitation exercise were performed. The patient recovered significantly. She could walk independently a month after the onset. Conclusions: Although MRI provides important evidence for diagnosis, clinical manifestations are the most important when diagnosing. For patients who were highly suspected of SCI clinically, treatment for vascular diseases should be applied as soon as possible even if no lesion is found on imaging examination.展开更多
Large strike-slip faults play a crucial role in regulating the geometry and kinematics of the solid Earth's outer lithospheric plates and the structural deformation of internal continents.They not only control the...Large strike-slip faults play a crucial role in regulating the geometry and kinematics of the solid Earth's outer lithospheric plates and the structural deformation of internal continents.They not only control the geometric structures,motion properties,and direction of the lithospheric plates,but also regulate the complex tectonic stress field and strain state caused by differential motion among multiple blocks within the continent,maintaining the relative stability of the overall stress state of the lithosphere on the Earth's surface.According to the nature and significance of geotectonic structures,strike-slip faults can be divided into interplate types and intraplate tectonic types.Interplate strike-slip faults are transform faults,including oceanic transform faults and continental transform faults.Intraplate strike-slip faults can be divided into continental transfer faults and intraplate transcurrent faults.During the lateral movement of lithospheric plates along the Earth's surface,transform faults adjust the differences in the nature,direction,and rate of movement between different plates.Meanwhile,continental transfer faults and intraplate transcurrent faults adjust the location,nature,style,and differential stress of intraplate tectonic deformation.Strike-slip faults of varying types and scales interact in different ways to maintain the dynamic balance of matter and energy within Earth's lithospheric plates.Based on the concepts,tectonic significance,and recent research advances of strike-slip faults and classical transform faults,this paper summarizes the latest classification of strike-slip faults and their corresponding tectonic implications.It also updates the definitions,geometric characteristics,and kinematic features of oceanic transform faults,continental transform faults,continental transfer faults,and intraplate transcurrent faults.Through typical global examples,this paper comprehensively analyzes the deep structure,structural geometry and kinematic characteristics,evolution process,geological significance,and seismic hazards of different types of strike-slip faults.Furthermore,the frontier science issue and research strategies for the study of oceanic transform faults,continental transfer faults,and intraplate transcurrent faults are summarized as well.展开更多
The effectiveness of treatment for the chronic phase of febrile infection-related epilepsy syndrome(FIRES)remains uncertain.This study aimed to evaluate the therapeutic efficacy of minocycline in patients with chronic...The effectiveness of treatment for the chronic phase of febrile infection-related epilepsy syndrome(FIRES)remains uncertain.This study aimed to evaluate the therapeutic efficacy of minocycline in patients with chronic FIRES who had a poor response to conventional antiseizure medications.Three patients received 100 mg of minocycline(100 mg twice daily for 12 weeks),with effectiveness assessed based on seizure frequency,duration,type,and quality of life(using the quality of life in epilepsy-31,QOLIE-31),alongside adverse event monitoring.Results showed that one patient(Patient 3)exhibited a significant reduction in seizure duration and improved QOLIE-31 scores,with focal seizures being the only type observed after treatment.However,there was no statistically significant change in overall seizure frequency among the three patients.Additionally,a short literature review was conducted to explore various management strategies for chronic FIRES,including IL-1 receptor antagonist(anakinra)and IL-6 receptor antagonist(tocilizumab),centro-median thalamic nuclei deep brain stimulation,cannabidiol,responsive neurostimulation,intrathecal dexamethasone,ketogenic diet,and vagus nerve stimulation.In conclusion,considering the existing research on the etiological mechanisms of FIRES and based on our preliminary findings on the anti-inflammatory and antiepileptic properties of minocycline,early initiation of minocycline therapy in the chronic phase of FIRES should be explored further.展开更多
Rheology of rocks controls the deformation of the Earth at various space-time scales,which is crucial to understand the tectonic evolution of continental lithosphere.Researches of rock rheology are mainly conducted vi...Rheology of rocks controls the deformation of the Earth at various space-time scales,which is crucial to understand the tectonic evolution of continental lithosphere.Researches of rock rheology are mainly conducted via high-pressure and hightemperature rheological experiments and multi-scale observations and measurements of naturally deformed rocks.At present,a large amount of data from such kinds of studies have been accumulated.This paper first provides an up-to-date comprehensive review of the rheological mechanisms,fabric types and seismic properties of the main rock-forming minerals at different depths of continental lithosphere,including olivine,orthopyroxene,clinopyroxene,amphibole,plagioclase,quartz and mica.Then,progress in high-pressure and high-temperature experiments and natural deformation observations is introduced,mainly regarding the rheological strength and behavior,seismic velocity and anisotropy of lithospheric mantle peridotite,eclogite,mafic granulite,amphibolite and felsic rocks.Finally,by taking the Tibetan Plateau as an example,the application of rock rheology for quantitative interpretation of seismic anisotropy data is discussed.The combination of mineral deformation fabrics and seismic anisotropy is expected to make an important breakthrough in understanding the rheological properties and structure of continental lithosphere.展开更多
文摘It is an accepted fact that the main solid phase support for potassium in the Sichuan Basin is polyhalite [K2MgCa2(SO4)4·2H2O] rather than sylvineis (KCl) (Gong DX et al.,2015).The mineral types,occurrence characteristics and metasomatism of the polyhalite bearing ore-bed were identified and the origin of the polyhalite was discussed.The polyhalite samples were obtained from the core of Z12,located in Dalong Village,Guang'an City of central Sichuan.The sampling depths were 2974 m (s-1),3023 m (s-2) and 3106 m (s-3).The microbeam analysis of back-scattering images was carried out using a Shimadzu EPMA-1720 Series electron probe micro-analyzer,supplemented by a quantitative spectrum analysis that determined the mineral types.
基金supported by the Open Fund of Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil&Gas Reservoirs(No.KFJJ-TZ-2020-2)the National Natural Science Foundation of China(No.52104030)+1 种基金the Key Research and Development Program of Shaanxi(No.2022 KW-35)the China Fundamental Research Funds for the Central Universities。
文摘Polymer microspheres(PMs),such as polyacrylamide,have been widely applied for enhanced oil recovery(EOR),yet with environmental concerns.Here,we report a microfluid displacement technology containing a bio-based eco-friendly material,i.e.,calcium alginate(CaAlg)microspheres for EOR.Two dominant mechanisms responsible for EOR over Ca Alg fluid have been verified,including the microscopic oil displacement efficacy augmented by regulating capillary force(determined by the joint action of interfacial tension and wettability between different phases)and macroscopic sweep volume increment through profile control and mobility ratio reduction.This comprehensive effectiveness can be further impacted when the CaAlg microsphere is embellished ulteriorly by using appropriate amount of sodium dodecyl sulfonate(SDS).The core flooding and nuclear magnetic resonance(NMR)tests demonstrate that CaAlg-SDS microsphere can balance the interphase property regulation(wettability alteration and IFT reduction)and rheology properties,enabling simultaneous profile control and oil displacement.Excessive introduction of SDS will have a negative impact on rheological properties,which is not favored for EOR.Our results show that the involvement of 4-m M SDS will provide the best behavior,with an EOR rate of 34.38%.This cost-effective and environmentally-friendly bio-microspherebased microfluidic displacement technology is expected to achieve“green”oil recovery in future oilfield exploitation.
基金supported by Science and Technology Projects of Gansu,China(No.22ZD6GA014).
文摘The structure of the concave-convex plates has proven to be crucial in optimizing the internal flow characteristics of the electrolyzer for hydrogen production.This paper investigates the impact of the gradual expansion angle of the inlet channel on the internal flow field of alkaline electrolyzers.The flow distribution characteristics of concave-convex plates with different inlet angle structures in the electrolytic cell is discussed.Besides,the system with internal heat source is studied.The results indicate that a moderate gradual expansion angle is beneficial for enhancing fluid uniformity.However,an excessively large gradual expansion angle may lead to adverse reflux phenomena,reducing the overall performance of the electrolytic cell.
文摘Introduction: Spinal cord infarction (SCI) is a relatively rare disease. Abnormality on magnetic resonance imaging (MRI) is an important diagnostic criterion. It may be normal on the first day. Then abnormal signal will appear a few days later. There were some reports with negative MRI findings at the beginning. However, those reports were neither found abnormalities on repeat MRI nor without repeat MRI. Case Presentation: We report a case of SCI presented as paralysis of lower limbs and chest pain with no abnormalities on MRI through the course of disease in a 74-year-old female. Anti-platelet aggregation drugs, stabilizing plaque treatments and rehabilitation exercise were performed. The patient recovered significantly. She could walk independently a month after the onset. Conclusions: Although MRI provides important evidence for diagnosis, clinical manifestations are the most important when diagnosing. For patients who were highly suspected of SCI clinically, treatment for vascular diseases should be applied as soon as possible even if no lesion is found on imaging examination.
基金supported by the National Natural Science Foundation of China(Grant Nos.42330310,42442012)。
文摘Large strike-slip faults play a crucial role in regulating the geometry and kinematics of the solid Earth's outer lithospheric plates and the structural deformation of internal continents.They not only control the geometric structures,motion properties,and direction of the lithospheric plates,but also regulate the complex tectonic stress field and strain state caused by differential motion among multiple blocks within the continent,maintaining the relative stability of the overall stress state of the lithosphere on the Earth's surface.According to the nature and significance of geotectonic structures,strike-slip faults can be divided into interplate types and intraplate tectonic types.Interplate strike-slip faults are transform faults,including oceanic transform faults and continental transform faults.Intraplate strike-slip faults can be divided into continental transfer faults and intraplate transcurrent faults.During the lateral movement of lithospheric plates along the Earth's surface,transform faults adjust the differences in the nature,direction,and rate of movement between different plates.Meanwhile,continental transfer faults and intraplate transcurrent faults adjust the location,nature,style,and differential stress of intraplate tectonic deformation.Strike-slip faults of varying types and scales interact in different ways to maintain the dynamic balance of matter and energy within Earth's lithospheric plates.Based on the concepts,tectonic significance,and recent research advances of strike-slip faults and classical transform faults,this paper summarizes the latest classification of strike-slip faults and their corresponding tectonic implications.It also updates the definitions,geometric characteristics,and kinematic features of oceanic transform faults,continental transform faults,continental transfer faults,and intraplate transcurrent faults.Through typical global examples,this paper comprehensively analyzes the deep structure,structural geometry and kinematic characteristics,evolution process,geological significance,and seismic hazards of different types of strike-slip faults.Furthermore,the frontier science issue and research strategies for the study of oceanic transform faults,continental transfer faults,and intraplate transcurrent faults are summarized as well.
基金supported by National Natural Science Foundation of China(82401744).
文摘The effectiveness of treatment for the chronic phase of febrile infection-related epilepsy syndrome(FIRES)remains uncertain.This study aimed to evaluate the therapeutic efficacy of minocycline in patients with chronic FIRES who had a poor response to conventional antiseizure medications.Three patients received 100 mg of minocycline(100 mg twice daily for 12 weeks),with effectiveness assessed based on seizure frequency,duration,type,and quality of life(using the quality of life in epilepsy-31,QOLIE-31),alongside adverse event monitoring.Results showed that one patient(Patient 3)exhibited a significant reduction in seizure duration and improved QOLIE-31 scores,with focal seizures being the only type observed after treatment.However,there was no statistically significant change in overall seizure frequency among the three patients.Additionally,a short literature review was conducted to explore various management strategies for chronic FIRES,including IL-1 receptor antagonist(anakinra)and IL-6 receptor antagonist(tocilizumab),centro-median thalamic nuclei deep brain stimulation,cannabidiol,responsive neurostimulation,intrathecal dexamethasone,ketogenic diet,and vagus nerve stimulation.In conclusion,considering the existing research on the etiological mechanisms of FIRES and based on our preliminary findings on the anti-inflammatory and antiepileptic properties of minocycline,early initiation of minocycline therapy in the chronic phase of FIRES should be explored further.
基金supported by the National Natural Science Foundation of China(Grant Nos.42022016,41930217 and 42372257)the Youth Innovation Team of Shaanxi Universities.
文摘Rheology of rocks controls the deformation of the Earth at various space-time scales,which is crucial to understand the tectonic evolution of continental lithosphere.Researches of rock rheology are mainly conducted via high-pressure and hightemperature rheological experiments and multi-scale observations and measurements of naturally deformed rocks.At present,a large amount of data from such kinds of studies have been accumulated.This paper first provides an up-to-date comprehensive review of the rheological mechanisms,fabric types and seismic properties of the main rock-forming minerals at different depths of continental lithosphere,including olivine,orthopyroxene,clinopyroxene,amphibole,plagioclase,quartz and mica.Then,progress in high-pressure and high-temperature experiments and natural deformation observations is introduced,mainly regarding the rheological strength and behavior,seismic velocity and anisotropy of lithospheric mantle peridotite,eclogite,mafic granulite,amphibolite and felsic rocks.Finally,by taking the Tibetan Plateau as an example,the application of rock rheology for quantitative interpretation of seismic anisotropy data is discussed.The combination of mineral deformation fabrics and seismic anisotropy is expected to make an important breakthrough in understanding the rheological properties and structure of continental lithosphere.
