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68篇 您的检索式:作者名="Xiaoguang Ma"
    题名 作者 年代 出处 被引量
1Validation of quantitative computed tomography-derived areal bone mineral density with dual energy X-ray absorptiometry in an elderly Chinese population显示文摘Cheng Xiaoguang Wang Ling Wang Qianqian Ma Yimin Su Yongbin Li Kai 2014Chinese Medical Journal2014,,8:22
2Breast milk macronutrient composition and the associated factors in urban Chinese mothers显示文摘Yang Titi Zhang Yumei Ning Yibing You Lili Ma Defu Zheng Yingdong Yang Xiaoguang Li Wenjun Wang Junkuan Wang Peiyu 2014Chinese Medical Journal2014,,9:17
3Recent progress in methane dehydroaromatization: From laboratory curiosities to promising technology显示文摘Direct conversion of methane to benzene or other valuable chemicals is a very promising process for the efficient application of natural gas. Compared with conversion processes that require oxidants, non-oxidative direct conversion is more attractive due to high selectivity to the target product. In this paper, an alternative route for methane dehydrogenation and selective conversion to benzene and hydrogen without the participation of oxygen is discussed. A brief review of the catalysts used in methane dehydroaromatization (MDA) is first given, followed by our current understanding of the location and the active phase of Mo species, the reaction mechanism, the mechanism of carbonaceous deposit and the deactivation of Mo/zeolite catalysts are systematically discussed. Ways to improve the catalytic activity and stability are described in detail based on catalyst and reaction as well as reactor design. Future prospects for methane dehydroaromatization process are also presented.Shuqi Ma Xiaoguang Guo Lingxiao Zhao Susannah Scott Xinhe Bao 2013Journal of Energy Chemistry2013,22,1:17
4体力活动、久坐、身体素质与1型和2型糖尿病年轻患者健康预后的关系:对流行病学文献的综述(英文)显示文摘Diabetes is a leading chronic disease of childhood and adolescence.In addition to the well-known auto-immune,insulin-dependent diabetes mellitus(type 1 diabetes(T1D)),the past two decades have witnessed the emergence of type 2 diabetes(T2D) in children and adolescents,which previously was only seen in middle-aged or older adults.One of the key components of diabetes management is physical activity(PA).The beneficial effects of increased PA and decreased sedentary behavior are extremely important in youth with diabetes because of the markedly increased long-term risk of cardiovascular disease in this population compared to persons without diabetes.This review aims to comprehensively summarize the epidemiologic,observational research published and listed in PubMed between 1970 and 2012 on PA and sedentary behaviors,as well as physical fitness in children and adolescents with TID and T2D.Additionally,we describe briefly the state of knowledge on perceived barriers of PA in persons with diabetes,with a focus on hypoglycemia.Finally,we provide an overview of the epidemiological literature pertaining to health benefits of increased PA in youth with TID and T2D and briefly discuss the topic of exercise-related hypoglycemia.Angela D. Liese Xiaoguang Ma David M. Maahs Jennifer L. Trilk 2013Journal of Sport and Health Science2013,2,1:12
5Mild hypothermia combined with neural stem cell transplantation for hypoxic-ischemic encephalopathy: neuroprotective effects of combined therapy显示文摘Neural stem cell transplantation is a useful treatment for ischemic stroke, but apoptosis often occurs in the hypoxic-ischemic environment of the brain after cell transplantation. In this study, we determined if mild hypothermia(27–28°C) can increase the survival rate of neural stem cells(1.0 × 105 /μL) transplanted into neonatal mice with hypoxic-ischemic encephalopathy. Long-term effects on neurological functioning of the mice were also examined. After mild hypothermia combined with neural stem cell transplantation, we observed decreased expression levels of inflammatory factor nuclear factor-kappa B and apoptotic factor caspase-3, reduced cerebral infarct volumes, increased survival rate of transplanted cells, and marked improvements in neurological function. Thus, the neuroprotective effects of mild hypothermia combined with neural stem cell transplantation are superior to those of monotherapy. Moreover, our findings suggest that the neuroprotective effects of mild hypothermia combined with neural stem cell transplantation on hypoxic-ischemic encephalopathy are achieved by anti-inflammatory and anti-apoptotic mechanisms.Lin Wang Feng Jiang Qifeng Li Xiaoguang He Jie Ma 2014Neural Regeneration Research2014,9,19:12
6Systems metabolic engineering strategies for the production of amino acids显示文摘Systems metabolic engineering is a multidisciplinary area that integrates systems biology,synthetic biology and evolutionary engineering.It is an efficient approach for strain improvement and process optimization,and has been successfully applied in the microbial production of various chemicals including amino acids.In this review,systems metabolic engineering strategies including pathwayfocused approaches,systems biology-based approaches,evolutionary approaches and their applications in two major amino acid producing microorganisms:Corynebacterium glutamicum and Escherichia coli,are summarized.Qian Ma Quanwei Zhang Qingyang Xu Chenglin Zhang Yanjun Li Xiaoguang Fan Xixian Xie Ning Chen 2017Synthetic and Systems Biotechnology2017,2,2:10
7Properties of Continental Margin and its Hydrocarbon Exploration Significance in Cambrian in the Southern Ordos Kratogen of North China显示文摘It is important to determine the properties of the tectonics in Cambrian period for the sake of prospecting deep hydrocarbon in the near future in the southern Ordos Kratogen of North China. Authors chose the marginal areas of the southern Ordos basin as the object of research, avoided the effects of both the Qinling Orogenic Belts (QOB) and Weihe River Graben (WRG) whose geological structures are too complicated. By surveying typical Cambrian outcrops and profiles in the basin edges and based on the cores of 57 wells which penetrated the Cambrian in the basin, combined with the seismic profiles, the field gammaray measuement results and the carbon isotope analysis, Authors conclude that the southern margin of the Ordos Kratogen during Cambrian was a passive continental margin which resulted from sea-floor spreading of the Ancient Qinling Ocean. Epicontinental sea carbonate sediments formed in the south Ordos continental margin during Cambrian, and were predominant as tidal flat and o litic shoal. Both transgression-regression process and the change in palaeostructure have the obvious cyclicity. Using the junction between the late Nangao age of Qiandong epoch and the early Duyun age of Qiandong epoch as a boundary, each had a full transgression cycle at the upper and lower stages. The early cycle is characterized by high energy clastic littoral facies while the late cycle is characterized by carbonate ramp on which clear water and muddy water developed alternately changing to carbonate platform last. During the early stages, An aulacogen was formed in the middle section of the southern margin. The southern Ordos margin was uplifted and denudated by the Huaiyuan Movement which occurred from the late Furongian age to the middle Flolan age and the history of the passive continental margin ended and entering into a new tectonic cycle. The unconformity surface caused by the Huaiyuan Movement, along with its neighborhood areas where dissolved pores and cavities are developed, may be another important district for good hydrocarbon reservoirs (excluding the unconformity surface on the top of the Ordovician in the Ordos basin).BAI Yunlai MA Yuhu HUANG Yong LIAO Jianbo LIU Xiaoguang 2013Acta Geologica Sinica(English Edition)2013,87,3:9
8SwinFusion: Cross-domain Long-range Learning for General Image Fusion via Swin Transformer显示文摘This study proposes a novel general image fusion framework based on cross-domain long-range learning and Swin Transformer,termed as SwinFusion.On the one hand,an attention-guided cross-domain module is devised to achieve sufficient integration of complementary information and global interaction.More specifically,the proposed method involves an intra-domain fusion unit based on self-attention and an interdomain fusion unit based on cross-attention,which mine and integrate long dependencies within the same domain and across domains.Through long-range dependency modeling,the network is able to fully implement domain-specific information extraction and cross-domain complementary information integration as well as maintaining the appropriate apparent intensity from a global perspective.In particular,we introduce the shifted windows mechanism into the self-attention and cross-attention,which allows our model to receive images with arbitrary sizes.On the other hand,the multi-scene image fusion problems are generalized to a unified framework with structure maintenance,detail preservation,and proper intensity control.Moreover,an elaborate loss function,consisting of SSIM loss,texture loss,and intensity loss,drives the network to preserve abundant texture details and structural information,as well as presenting optimal apparent intensity.Extensive experiments on both multi-modal image fusion and digital photography image fusion demonstrate the superiority of our SwinFusion compared to the state-of-theart unified image fusion algorithms and task-specific alternatives.Implementation code and pre-trained weights can be accessed at https://github.com/Linfeng-Tang/SwinFusion.Jiayi Ma Linfeng Tang Fan Fan Jun Huang Xiaoguang Mei Yong Ma 2022IEEE/CAA Journal of Automatica Sinica2022,9,7:8
9Methane dehydroaromatization with periodic CH_4-H_2 switch:A promising process for aromatics and hydrogen显示文摘Long-term stability test of Mo/HZSM-5-N catalysts(HZSM-5-N stands for nano-sized HZSM-5) in methane dehydroaromatization(MDA)reaction has been performed with periodic CH4-H2 switch at 1033-1073 K for more than 1000 h.During this test,methane conversion ranges from 13% to 16%,and mean yield to aromatics(i.e.benzene and naphthalene) exceeds 10%.N2-physisorption,XRD,NMR and TPO measurements were performed for the used Mo/HZSM-5 catalysts and coke deposition,and the results revealed that the periodic hydrogenation can effectively suppress coke deposition by removing the inert aromatic-type coke,thus ensuring Mo/HZSM-5 partly maintained its activity even in the presence of large amount of coke deposition.The effect of zeolite particle size on the catalytic activity was also explored,and the results showed that the nano-sized zeolite with low diffusion resistance performed better.It is recognized that the size effect was enhanced by reaction time,and it became more remarkable in a long-term MDA reaction even at a low space velocity.Changyong Sun Guangzong Fang Xiaoguang Guo Yuanli Hu Shuqi Ma Tianhua Yang Jie Han Hao Ma Dali Tan Xinhe Bao 2015Journal of Energy Chemistry2015,24,3:6
10Effect of Transverse Grain Boundary on Microstructure,Texture and Mechanical Properties of Drawn Copper Wires显示文摘In the present study,microstructure and texture of drawn copper wires with a large number of transverse grain boundaries have been characterized and their mechanical properties have been analyzed.The results show that the texture evolution is accelerated by transverse grain boundary and the saturation value 60%of volume fraction of <111> fiber texture component is reached rapidly with increasing strain.For the microstructure of drawn wires with a large number of transverse grain boundaries,the critical strain,where lamellar boundaries form,is less than that for wires with equiaxed grains or columnar grains(all grain boundaries parallel to axis direction).Since transverse grain boundary accelerates grain subdivision and dislocation density increases rapidly in drawn wires with a large number of transverse grain boundaries,there are a higher flow stress and a higher work hardening rate.Jian Chen Xiaoguang Ma Wen Yan Feng Xia Xinhui Fan 2014Journal of Materials Science & Technology2014,30,2:5
11Microstructure and texture evolution of cold drawing <110> single crystal copper显示文摘By means of electron backscattering diffraction and transmission electron microscopy the microstructure and texture of drawn single crystal copper with initial orientation <110> parallel to axial direction have been investigated in the present work.In or-der to analyze the effect of initial orientation on microstructure and texture of drawn copper,the results of the drawn <110> sin-gle crystal copper wires have been compared with <100> and <111> single crystal copper wires.It is found that the grain subdi-vision of <110> single crystal is more evident than that of <100> and <111>,and the textures consisting of <111> and <100> abruptly form in the drawn <110> single crystal.At high strains,due to shear strain,the distribution of fiber textures is imho-mogenous along the radial direction of drawn <110> single crystal copper wires.<100> is near the surface and <111> is at the center.The microstructure results of drawn <110> single crystal show that at low strains,it can be characterized as two kinds of geometrically necessary boundaries with noncrystalline character.At medium strains,S bands can be observed.At high strains,lamellar boundaries form.Mean misorientation and average spacing of dislocation boundary are larger in drawn <110> single crystal,as compared with <111> and <100>.In drawn <110> single crystal with high strains,the bimodal distribution forms at lower strains than in drawn <100> single crystal,which is because the dislocation boundaries with high angle are contributed by not only the boundary between <111> and <100> fiber textures but also the boundary in <111> or <100> texture.CHEN Jian YAN Wen LI Bing MA XiaoGuang DU XinZhi FAN XinHui 2011Science China(Technological Sciences)2011,54,6:5
12Dynamic changes of phosphatidylinositol and phosphatidylinositol 4-phosphate levels modulate H^(+)-ATPase and Na^(+)/H^(+) antiporter activities to maintain ion homeostasis in Arabidopsis under salt stress显示文摘Plant metabolites are dynamically modified and distributed in response to environmental changes.How-ever,it is poorly understood how metabolic change functions in plant stress responses.Maintaining ion ho-meostasis under salt stress requires coordinated activation of two types of central regulators:plasma membrane(PM)H^(+)-ATPase and Na^(+)/H^(+) antiporter.In this study,we used a bioassay-guided isolation approach to identify endogenous small molecules that affect PM H^(+)-ATPase and Na^(+)/H^(+) antiporter activities and identified phosphatidylinositol(PI),which inhibits PM H^(+)-ATPase activity under non-stress conditions in Arabidopsis by directly binding to the C terminus of the PM H^(+)-ATPase AHA2.Under salt stress,the phosphatidylinositol 4-phosphate-to-phosphatidylinositol(PI4P-to-PI)ratio increased,and PI4P bound and activated the PM Na^(+)/H^(+) antiporter.PI prefers binding to the inactive form of PM H^(+)-ATPase,while PI4P tends to bind to the active form of the Na^(+)/H^(+) antiporter.Consistent with this,pis1 mutants,with reduced levels of PI,displayed increased PM H^(+)-ATPase activity and salt stress toler-ance,while the pi4kβ1 mutant,with reduced levels of PI4P,displayed reduced PM Na^(+)/H^(+) antiporter activity and salt stress tolerance.Collectively,our results reveal that the dynamic change between PI and PI4P in response to salt stress in Arabidopsis is crucial for maintaining ion homeostasis to protect plants from un-favorable environmental conditions.Yongqing Yang Xiuli Han Liang Ma Yujiao Wu Xiao Liu Haiqi Fu Guoyong Liu Xiaoguang Lei Yan Guo 2021Molecular Plant2021,14,12:4
13Effects of HMG on revascularization and follicular survival in heterotopic autotransplants of mouse ovarian tissue显示文摘Yanrong Wang Qing Chang Jing Sun Ling Dang Wenzhi Ma Changchun Hei Xinsheng Shen Chengjun Zhao Yufang Cai Xiuying Pei Xiaoguang Zhang Yin Wang Xiaohua Jiang 2012Reproductive BioMedicine Online2012,,6:4
14Evolution of microstructure and texture of cold-drawn polycrystalline Ag with low stacking fault energy显示文摘The evolution of microstructure and texture for drawn polycrystalline Ag was investigated by transmission electron microscopy and electron backscattering diffraction.The results show that there are deformation twins and some un-tangled discrete dislocations at low strains.When the strain is increased to 0.58,a lot of high density dislocation walls and microbands come into being.At the same time,some twins lose the twinning relationship of 60°<111>.At a strain of 0.94,both dislocation boundaries and twin boundaries will rotate to the axis direction of wires and the shear bands start to appear.When the strain is higher than 1.96,most of the boundaries are parallel to the drawn direction.Texture analysis indicates that with the strain increasing,the volume fraction of complex texture component decreases,but<111>and<100>texture components increase.However,the variation in the volume fraction of each texture component as strains is not evident when the strains are higher than 0.58.For polycrystalline Ag with low stacking fault energy,complex texture components are easily formed.MA XiaoGuang CHEN Jian CHEN Zheng YAN Wen 2015Science China(Technological Sciences)2015,58,7:3
15Effect of channel block on the collective spiking activity of coupled stochastic Hodgkin-Huxley neurons显示文摘Toxins, such as tetraethylammonium (TEA) and tetrodotoxin (TTX), can make potassium or sodium ion channels poisoned, respectively, and hence reduce the number of working ion channels and lead to the diminishment of conductance. In this paper, we have studied by numerical simulations the effects of sodium and potassium ion channel poisoning on the collective spiking activity of an array of coupled stochastic Hodgkin-Huxley (HH) neurons. It is found for a given number of neurons sodium or potas- sium ion channel block can either enhance or reduce the collective spiking regularity, depending on the membrane patch size. For a given smaller or larger patch size, potassium and sodium ion channel block can reduce or enhance the collective spiking regularity, but they have different patch size ranges for the transformation. This result shows that sodium or potassium ion channel block might have dif- ferent effects on the collective spiking activity in coupled HH neurons from the effects for a single neuron, which represents the interplay among the diminishment of maximal conductance and the in- crease of channel noise strength due to the channel blocks, as well as the bi-directional coupling be- tween the neurons.GONG YuBing XU Bo MA XiaoGuang HAN JiQu 2008Science China Chemistry2008,51,4:3
16Distribution and potential of global oil and gas resources显示文摘Using conventional and unconventional oil and gas resource evaluation methods with play as a unit, this study evaluates the oil and gas geology and resource potential of conventional oil and gas resources and seven types of unconventional resources in the global major oil and gas basins(excluding China). For the first time, resource evaluation data with independent intellectual property rights has been obtained. According to evaluation and calculation, the global recoverable conventional oil resources are 5 350.0×108 t, the recoverable condensate oil resources are 496.2×108 t, and the recoverable natural gas resources are 588.4×1012 m3. The remaining oil and gas 2 P recoverable reserves are 4 212.6×108 t, the reserve growth of oil and gas fields are 1 531.7×108 t. The undiscovered oil and gas recoverable resources are 3 065.5×108 t. The global unconventional oil recoverable resources are 4 209.4×108 t and the unconventional natural gas recoverable resources are 195.4×1012 m3. The evaluation results show that the global conventional and unconventional oil and gas resources are still abundant.TONG Xiaoguang ZHANG Guangya WANG Zhaoming WEN Zhixin TIAN Zuoji WANG Hongjun MA Feng WU Yiping 2018Petroleum Exploration and Development2018,45,4:2
17Immune responses of pigs inoculated with a recombinant fowlpox virus coexpressing GP5/GP3 of porcine reproductive and respiratory syndrome virus and swine IL-18显示文摘Guoshun Shen Ningyi Jin Mingxiao Ma Kuoshi Jin Min Zheng Tianzhong Zhuang Huijun Lu Guangze Zhu Hongtao Jin Minglan Jin Xiaowei Huo Xiaoguang Qin Ronglan Yin Chang Li Hongwen Li Yang Li Zhenzhen Han Yifeng Chen Miaomiao Jin 2007Vaccine2007,,21:2
18Delay-induced coherence bi-resonance-like behavior in stochastic Hodgkin-Huxley neuron networks显示文摘In this paper,we study how information transmission delays affect the spiking behavior of electrically coupled stochastic Hodgkin-Huxley (HH) neurons on Newman-Watts networks.It is found that the spiking behavior becomes the most regular at an optimal time delay,indicating the occurrence of delay-induced coherence resonance-like (CR-like) behavior.Interestingly,there are different CR-like types,depending on the membrane patch size of the neuron.For a smaller patch size,only single CR-like behavior occurs;while for a larger patch size,coherence bi-resonance-like (CBR) behavior appears.These findings show that the delay-induced CR-like behavior is closely related to the channel noise strength,and the coupled neurons may exhibit different spiking behaviors under the interplay of the channel noise and time delay.Therefore,the channel noise should be taken into account in the study of time delay-related spiking activity in stochastic HH neurons.This work provides new insight into the role of channel noise and information transmission delays in realistic neural systems.HAO YingHang,GONG YuBing,LIN Xiu & MA XiaoGuang School of Physics,Ludong University,Yantai 264025,China 2010Science China Chemistry2010,53,8:2
19A flexible BiFeO_(3)-based ferroelectric tunnel junction memristor for neuromorphic computing显示文摘Ferroelectric tunnel junctions(FTJs)as the artificial synaptic devices have been considered promising for constructing brain-inspired neuromorphic computing systems.However,the memristive synapses based on the flexible FTJs have been rarely studied.Here,we report a flexible FTJ memristor grown on a mica substrate,which consists of an ultrathin ferroelectric barrier of BiFeO_(3),a semiconducting layer of ZnO,and an electrode of SrRuO_(3).The obtained flexible FTJ memristor exhibits stable voltage-tuned multistates,and the resistive switchings are robust after 10^(3) bending cycles.The capability of the FTJ as a flexible synaptic device is demonstrated by the functionality of the spike-timing-dependent plasticity with bending,and the accurate conductance manipulation with small nonlinearity(-0.24)and low cycle-to-cycle variation(1.77%)is also realized.Especially,artificial neural network simulations based on experimental device behaviors reveal that the high recognition accuracies up to 92.8%and 86.2%are obtained for handwritten digits and images,respectively,which are close to the performances for ideal memristors.This work highlights the potential applications of FTJ as flexible electronics for data storage and processing.Haoyang Sun Zhen Luo Chuanchuan Liu Chao Ma Zijian Wang Yuewei Yin Xiaoguang Li 2022Journal of Materiomics2022,8,1:2
20Monitoring and management of source water pollution based on a new bio- optoelectronic system in Jinan, China显示文摘WANG Xiaoguang REN Zongming MA Zhongyu 2014Applied Mechanics and Materials2014,,:1
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