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Thermal currents obtained and mutually switched by a modified Haldane model in graphene

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Communications in Theoretical Physics 2022年第3期74卷 119-129页

作者： Xiao-long lü Hang Xie College of Science Guangxi University of Science and TechnologyLiuzhou 545006China College of Physics Chongqing UniversityChongqing 400000China Chongqing Key laboratory for Strongly-Coupled Physics Chongqing UniversityChongqing 400000China

by using the transfer matrix method,we discover three types of current,such as the 100%spinvalley polarized current,pure spin-valley current and pure charge current,in a two-terminal graphene *** types of current can be obtained and mutually switched by modulating the parameters of the modified Haldane model(MHM).In our work,these types of current are driven by the thermal *** with this method of increasing the one-lead temperature(with a fixed temperature difference),the thermal currents can be more effectively strengthened by increasing the temperature difference(with a fixed one-lead temperature).In order to rapidly turn off these currents,we choose to enhance the intensity of the off-resonant circularly polarized light instead of canceling the temperature *** results indicate that the graphene system with the MHM has promising applications in the spin and valley caloritronics.

关键词： graphene modified Haldane model thermal currents

Precipitation Cycles Relative to Storm Tracks, ENSO and PDO, and Drought—Continental Interior Central Western USA

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American Journal of Climate Change 2023年第3期12卷 335-358页

作者： Alan l. Mayo Mayo and Associates lC Phoenix AZ USA

Seventy-two years of central western United States precipitation data have been analyzed for storms originating 1000 to 3000 km away from four ocean moisture sources: Arctic, North Pacific, South Pacific, and Gulfs of California and Mexico. Precipitation trends were evaluated relative to precipitation phase, precipitation flux, storm track trajectory, and the sea surface temperature (SST) indices Oceanic Niño Index (ONI), and the Pacific Decadal Oscillation (PDO. The lack of correlation between SST indices with precipitation flux was evaluated. The relationships of meteorological, hydrological and snow droughts were evaluated relative to each other, to the climate change-induced temporal shifts in the timing of mountain snowpack decay, and the timing when North Pacific storm tracks shift from crossing to circumventing the Sierra Nevada Range.

关键词： Precipitation Cycle Meteoric Drought Hydrologic Drought Snow Drought Climate Change

Synchronous improvement of mechanical properties and stress corrosion resistance by stress-aging coupled with natural aging pre-treatment in an Al-Zn-Mg alloy with high recrystallization fraction

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Journal of Materials Science & Technology 2022年第26期121卷 40-51页

作者： D.Zhang H.C.Jiang Z.J.Cui D.S.Yan Y.Y.Song l.J.Rong CAS Key laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Shandong Key laboratory of Advanced Aluminum Materials and Technology Binzhou 256606China

Enhancing the strength of Al-Zn-Mg alloys is critical to the weight-lightening of structural components in the application of high-speed trains and aerospace industries,while high stress corrosion cracking(SCC)susceptibility of Al-Zn-Mg alloys(especially the alloy with high recrystallization fraction)with high strength makes it *** this study,the influence of tensile stress-aging coupled with natural aging pre-treatment on the mechanical properties and SCC resistance of Al-Zn-Mg alloy with high recrystallization fraction has been *** results show that tensile stress-aging at 160℃can inhibit the dissolution of clusters/Guinier-Preston(GP)zones formed during long-term natural aging pre-treatment,which increases the number density of matrix precipitates(MPts),narrow the width of precipitate free zone(PFZ),and dramatically improve the mechanical properties of the experimental Al-Zn-Mg ***,the precipitation of the high density of MPts within the matrix will assume a large number of solute atoms during artificial aging,which will reduce the supplement of solute atoms to grain *** a result,the volume of anodic active grain boundary precipitates(GbPs)and the content of free solute atoms at grain boundaries are reduced,which reduces the possibility of initial nucleation and propagation of SCC *** coupled treatment method proposed in this study proves efficient in resolving the contradiction between the strength and SCC resistance in Al-Zn-Mg alloy.

关键词： Al-Zn-Mg alloy Natural aging Stress-aging Precipitates Stress corrosion cracking

Cadmium sulfide cage photocatalysis coupled electroactive biofilm for synergistic promotion of tetracycline degradation and electricity production

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Journal of Materials Science & Technology 2023年第35期166卷 86-97页

作者： Z.S.Yuan J.X.Zou X.l.Zhao J.Y.Shi C.S.Guo M.Yan School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China

Tetracycline(TC)as a common broad-spectrum antibiotic,has been frequently detected in soil and sur-face *** becomes a great threat to the ecological ***,a device of photocatalysis as-sisted microbial fuel cell(photo-MFC)was constructed for TC degradation and energy *** this photo-MFC,cadmium sulfide(CdS)cage photocatalysis can degrade most of TC in a short *** the Co_(3)O_(4)@C-CC(carbonization and calcination of the ZIF-67 precursor in-situ grown on the carbon cloth(CC))bioanode degrades the rest of TC as well as the photocatalytic products,thus improving the *** co-existence of photocatalysis with bioanode changes the microbial community structure of the *** dominant phylum is Geobacter(60.2%)in normal MFC while that in photo-MFC are Pro-teobacteria(43.5%)and Geobacter(33.2%).Therefore,the synergistic effect of photocatalytic degradation and biodegradation achieves a chemical oxygen demand(COD)removal of 98.6%,which is higher than that of normal MFC(77.6%)or single CdS cage photocatalysis(23.8%).In addition,the photogenerated electrons can be transferred to the cathode,which reduces their combination with holes and increases the electricity generation of MFC,achieving a maximum power density of 3.37 W/m^(2).After degradation,the effluent with 200 mg l^(−1) TC exhibits no visible ***,electrochemical test,finite-difference time-domain(FDTD),density functional theory(DFT)calculation and the free radical trapping experiments verify the possible mechanisms of photocatalytic degradation in this *** strat-egy paves a new way for low energy consumption removal and energy recovery of organic pollutants.

关键词： Photo-MFC CdS cage Tetracycline degradation Mineralization Electricity production

在TRANSbAIKAlIA山区用无线阻抗测深法解释晶体和永冻岩石

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石油地球物理勘探 2004年第B11期39卷 151-152页

作者： Angarkhaeva l K bashkuev Y b Khaptanov V b 俄罗斯科学院西伯利亚分院buryat科学中心

位于俄罗斯北部TRANSbAIKAlIA山区的上地壳由结晶岩和永冻岩石组成，具有复杂的地电结构。在解决无线电物理、地电、电力工程和电讯系统中的电磁兼容性等方面的问题时都需要充分了解该区结晶岩体的电性和结构。为此需要采用精湛的无线... 详细信息

位于俄罗斯北部TRANSbAIKAlIA山区的上地壳由结晶岩和永冻岩石组成，具有复杂的地电结构。在解决无线电物理、地电、电力工程和电讯系统中的电磁兼容性等方面的问题时都需要充分了解该区结晶岩体的电性和结构。为此需要采用精湛的无线电阻抗测深自动数字解释方法。Angarkhaeva等在文献中详细介绍了无线电阻抗测深的反演过程，

关键词：无线阻抗测深法晶体岩石频率自动数字解释方法反演方法

Eccentric exercise-induced muscle weakness abolishes sex differences in fatigability during sustained submaximal isometric contractions

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运动与健康科学(英文) 2023年第4期12卷 523-533页

作者： Hanna l.Jodoin Avery Hinks Olivia P.Roussel Vincenzo S.Contento brian H.Dalton Geoffrey A.Power Department of Human Health and Nutritional Sciences College of Biological SciencesUniversity of GuelphGuelphON N1G 2W1Canada School of Health and Exercise Science University of British ColumbiaKelownaBC V1V 1V7Canada

background:Females are typically less fatigable than males during sustained isometric contractions at lower isometric contraction *** sex difference in fatigability becomes more variable during higher intensity isometric and dynamic *** less fatiguing than isometric or concentric contractions,eccentric contractions induce greater and longer lasting impairments in force ***,it is not clear how muscle weakness influences fatigability in males and females during sustained isometric ***:We investigated the effects of eccentric exercise-induced muscle weakness on time to task failure(TTF)during a sustained submaximal isometric contraction in young(18-30 years)healthy males(n=9)and females(n=10).Participants performed a sustained isometric contraction of the dorsiflexors at 35°plantar flexion by matching a 30%maximal voluntary contraction(MVC)torque target until task failure(i.e.,falling below 5%of their target torque for>2 s).The same sustained isometric contraction was repeated 30 min after 150 maximal eccentric *** and antagonist activation were assessed using surface electromyography over the tibialis anterior and soleus muscles,***:Males were~41%stronger than *** eccentric exercise both males and females experienced an~20%decline in maximal voliuntary contraction *** was-34%longer in females than males prior to eccentic exercise-induced muscle ***,following eccentric exercise-induced muscle weakness,this sex-related difference was abolished,with both groups having an"45%shorter ***,there was~100%greater antagonist activation in the female group during the sustained isometric contraction following exercise-induced weakness as compared to the ***:This increase in antagonist activation disadvantaged females by decreasing their TTF,resulting in a blunting of their typical fatigability advantage over males.

关键词： Fatigue Isometric Sex Time to task failure Weakness

Neuroimmune actions in the brain and interactions with the effects of alcohol

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Neural Regeneration Research 2021年第9期16卷 1791-1792页

作者： Donna l.Gruol Neuroscience Department The Scripps Research InstituteLa JollaCAUSA

The neuroimmune system of the brain:Early studies(1990’s)on the neurological consequences of human immunodeficiency virus-1(HIV-1)infection in the brain were instrumental in establishing that specific brain cell types can function as an innate immune system within the brain and in that role influence cognitive function(Kaul et al.,2005).

关键词： Neuroimmune actions in the brain and interactions with the effects of alcohol

Endocannabinoids are potential inhibitors of glioblastoma multiforme proliferation

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Journal of Integrative Medicine 2023年第2期21卷 120-129页

作者： Ashraf Duzan Desiree Reinken Timothy l.McGomery Nicholas M.Ferencz Jacob M.Plummer Mufeed M.basti School of Pharmacy Wingate UniversityWingateNC 28174USA Applied Science and Technology Department North Carolina State University of Agriculture and TechnologyGreensboroNC 27411USA College of Nursing University of Colorado Anschutz Medical CampusAuroraCO 80045USA Collage of Arts and Science Department of Chemistry and PhysicsWingate UniversityWingateNC 28174USA

Globally,it is evident that glioblastoma multiforme(GbM)is an aggressive malignant cancer with a high mortality rate and no effective treatment *** is classified as the stage-four progression of a glioma tumor,and its diagnosis results in a shortened life *** options for GbM include chemotherapy,immunotherapy,surgical intervention,and conventional pharmacotherapy;however,at best,they extend the patient’s life by a maximum of 5 *** are considered incurable due to their high recurrence rate,despite various aggressive therapeutic approaches which can have many serious adverse ***,classified as endocannabinoids,offer a promising novel therapeutic approach for *** may enhance the apoptosis of GbM cells but have no effect on normal healthy neural *** promote atypical protein kinase C,deactivate fatty acid amide hydrolase enzymes,and activate transient receptor potential vanilloid 1(TRPV1)and TRPV2 to induce pro-apoptotic signaling pathways without increasing endogenous *** previous in vivo studies,endocannabinoids,chemically classified as amide formations of oleic and palmitic acids,have been shown to increase the pro-apoptotic activity of human cancer cells and inhibit cell migration and *** review focuses on the biological synthesis and pharmacology of endogenous cannabinoids for the enhancement of cancer cell apoptosis,which have potential as a novel therapy for GbM.

关键词： Glioblastoma Endocannabinoids Ceramide Apoptosis Chemotherapy Cancer

A flexible electrode array for determining regions of motor function activated by epidural spinal cord stimulation in rats with spinal cord injury

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Neural Regeneration Research 2022年第3期17卷 601-607页

作者： Guang-Wei Mao Jian-Jun Zhang Hao Su Zhi-Jun Zhou lin-Sen Zhu Xiao-Ying lü Zhi-Gong Wang State Key laboratory of bioelectronics Southeast UniversityNanjingJiangsu ProvinceChina Institute of RF-&OE-ICs Southeast UniversityNanjingJiangsu ProvinceChina Co-innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina

Epidural stimulation of the spinal cord is a promising technique for the recovery of motor function after spinal cord *** key challenges within the reconstruction of motor function for paralyzed limbs are the precise control of sites and parameters of *** activate lower-limb muscles precisely by epidural spinal cord stimulation,we proposed a high-density,flexible electrode *** determined the regions of motor function that were activated upon epidural stimulation of the spinal cord in a rat model with complete spinal cord,which was established by a transection *** evaluating the effect of stimulation,the evoked potentials were recorded from bilateral lowerlimb muscles,including the vastus lateralis,semitendinosus,tibialis anterior,and medial *** determine the appropriate stimulation sites and parameters of the lower muscles,the stimulation characteristics were studied within the regions in which motor function was activated upon spinal cord *** the vastus lateralis and medial gastrocnemius,these regions were symmetrically located at the lateral site of l1 and the medial site of l2 vertebrae segment,*** tibialis anterior and semitendinosus only responded to stimulation simultaneously with other *** minimum and maximum stimulation threshold currents of the vastus lateralis were higher than those of the medial *** results demonstrate the ability to identify specific stimulation sites of lower muscles using a high-density and flexible *** also provide a reference for selecting the appropriate conditions for implantable stimulation for animal models of spinal cord *** study was approved by the Animal Research Committee of Southeast University,China(approval No.20190720001) on July 20,2019.

关键词： electrode array epidural spinal cord stimulation evoked potentials motor function rehabilitation spinal cord injury spinal segment