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On Characterizations of Special Elements in Rings with Involution
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作者 Sanzhang XU Jianlong CHEN Dijana MOSIC 《数学年刊:B辑英文版》 SCIE CSCD 2019年第1期65-78,共14页
Let R be a ring with involution. It is well-known that an EP element in R is a core invertible element, but the question when a core invertible element is an EP element,the authors answer in this paper. Several new ch... Let R be a ring with involution. It is well-known that an EP element in R is a core invertible element, but the question when a core invertible element is an EP element,the authors answer in this paper. Several new characterizations of star-core, normal and Hermitian elements in R are also presented. 展开更多
关键词 Moore-Penrose INVERSE Core INVERSE EP ELEMENT Star-core ELEMENT Normal ELEMENT HERMITIAN ELEMENT
THE FACTORIZATION METHOD FOR A MIXED SCATTERING PROBLEM FROM A BOUNDED OBSTACLE AND AN OPEN ARC
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作者 Qinghua Wu Meilan Zeng +2 位作者 Wentao Xiong Guozheng Yan Jun Guo 《计算数学:英文版》 SCIE CSCD 2019年第3期384-402,共19页
In this paper,we consider the scattering problem of time-harmonic electromagnetic waves from an infinite cylinder having an open arc Γ and a bounded domain D in R^2 as cross section.We focus on the inverse scattering... In this paper,we consider the scattering problem of time-harmonic electromagnetic waves from an infinite cylinder having an open arc Γ and a bounded domain D in R^2 as cross section.We focus on the inverse scattering problem,that is,to reconstruct the shape of Γ and D from the far-field pattern by using the factorization method.Through establishing a mixed reciprocity relation,we prove that the scatters Γ and D can be uniquely determined by the far-field pattern.Furthermore,the mathematical basis is given to explain that the factorization method is feasible to our problem.At the end of this paper,we give some numerical examples to show the efficaciousness of the algorithms. 展开更多
关键词 FACTORIZATION method Inverse SCATTERING problem MIXED SCATTERING Time-harmonic electromagnetic wave
USB卡盖双色注射模设计
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作者 钱志良 《模具工业》 2019年第3期42-45,共4页
通过对USB卡盖的注射工艺及对应的模具结构进行分析和研究,提出采用双色注射工艺成型塑件,并设计了整体式双色注射模结构,模具结构采用倒装设计和热流道系统,还介绍了注射模的推出机构和冷却系统及工作过程。模具结构设计合理,提高了塑... 通过对USB卡盖的注射工艺及对应的模具结构进行分析和研究,提出采用双色注射工艺成型塑件,并设计了整体式双色注射模结构,模具结构采用倒装设计和热流道系统,还介绍了注射模的推出机构和冷却系统及工作过程。模具结构设计合理,提高了塑件的结合性及成型效率。 展开更多
关键词 双色 注射模 USB卡盖 倒装 模具结构
Quantitative climatic reconstruction of the Last Glacial Maximum in China
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作者 Haibin WU Qin LI +4 位作者 Yanyan YU Aizhi SUN Yating LIN Wenqi JIANG Yunli LUO 《中国科学:地球科学英文版》 SCIE EI CAS CSCD 2019年第8期1269-1278,共10页
Quantitative paleoclimatic reconstruction is crucial for understanding the operation and evolution of the global climate system.For example,a quantitative paleoclimatic reconstruction for the Last Glacial Maximum(18&#... Quantitative paleoclimatic reconstruction is crucial for understanding the operation and evolution of the global climate system.For example,a quantitative paleoclimatic reconstruction for the Last Glacial Maximum(18±2 ka14C,LGM)is fundamental to understanding the evolution of Earth’s climate during the last glacial-interglacial cycle.Previous quantitative palaeoclimate reconstructions in China are generally based on statistical comparison of modern pollen assemblages and modern climate data.These methods are based on the premise that vegetation-climate interactions remain the same through time,and implicitly assume that the interactions are independent of changes in seasonality and atmospheric CO2concentration.However,these assumptions may not always be valid,which may affect the reconstructions.Here,we present the results of a quantitative study of the LGM climate of China based on an improved inverse vegetation model which incorporates physiological processes combined with a new China Quaternary Pollen Database.The results indicate that during the LGM,mean annual temperature(ANNT),mean temperature of the coldest month(MTCO)and mean temperature of the warmest month in China were lower by~5.6±0.8,~11.0±1.6 and~2.6±0.9°C,respectively,compared to today,and that the changes in ANNT were mainly due to the decrease of MTCO.The ANNT decrease in southern China was~5.5±0.5°C.Mean annual precipitation was lower by~46.3±17.8 mm compared to today and was especially low in northern China(~51.2±21.4 mm)due to the decrease in summer rainfall.Comparison of our results with recent outputs from paleoclimatic modelling reveals that while the latter are broadly consistent with our estimated changes in mean annual climatic parameters,there are substantial differences in the seasonal climatic parameters.Our results highlight the crucial importance of developing seasonal simulation on paleoclimatic models,as well as the need to improve the quality of paleoclimatic reconstructions based on proxy records from geological archi 展开更多
关键词 QUANTITATIVE PALEOCLIMATIC reconstruction INVERSE VEGETATION model BIOME SEASONAL climate changes Atmospheric CO2 concentration
Reconstruction of Singular Second-order Differential Equations From Spectral Characteristics
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作者 Seyfollah MOSAZADEH 《应用数学学报:英文版》 SCIE CSCD 2019年第3期645-654,共10页
In this work,we study boundary value problems for second-order differential equations with singularities of second kind inside an interval.First,we investigate properties of the spectrum,then prove a theorem on comple... In this work,we study boundary value problems for second-order differential equations with singularities of second kind inside an interval.First,we investigate properties of the spectrum,then prove a theorem on completeness of eigenfunctions,and study the inverse problem of reconstructing the differential equation from spectral characteristics. 展开更多
关键词 SINGULARITY SPECTRAL characteristics INVERSE problem COMPLETENESS WEYL function
Inhibition ofα5 GABAA receptors has preventive but not therapeutic effects on isoflurane-induced memory impairment in aged rats 预览
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作者 Zi-Fang Zhao Lei Du +4 位作者 Teng Gao Lin Bao Yuan Luo Yi-Qing Yin Yong-An Wang 《中国神经再生研究:英文版》 SCIE CAS CSCD 2019年第6期1029-1036,共8页
Theα5 subunit-containing gamma-amino butyric acid type A receptors(α5 GABAARs)are a distinct subpopulation that are specifically distributed in the mammalian hippocampus and also mediate tonic inhibitory currents in... Theα5 subunit-containing gamma-amino butyric acid type A receptors(α5 GABAARs)are a distinct subpopulation that are specifically distributed in the mammalian hippocampus and also mediate tonic inhibitory currents in hippocampal neurons.These tonic currents can be enhanced by low-dose isoflurane,which is associated with learning and memory impairment.Inverse agonists ofα5 GABAARs,such as L-655,708,are able to reverse the short-term memory deficit caused by low-dose isoflurane in young animals.However,whether these negative allosteric modulators have the same effects on aged rats remains unclear.In the present study,we mainly investigated the effects of L-655,708 on low-dose(1.3%)isoflurane-induced learning and memory impairment in elderly rats.Young(3-month-old)and aged(24-month-old)Wistar rats were randomly assigned to receive L-655,708 0.5 hour before or 23.5 hours after 1.3%isoflurane anesthesia.The Morris Water Maze tests demonstrated that L-655,708 injected before or after anesthesia could reverse the memory deficit in young rats.But in aged rats,application of L-655,708 only before anesthesia showed similar effects.Reverse transcription-polymerase chain reaction showed that low-dose isoflurane decreased the mRNA expression ofα5 GABAARs in aging hippocampal neurons but increased that in young animals.These findings indicate that L-655,708 prevented but could not reverse 1.3%isoflurane-induced spatial learning and memory impairment in aged Wistar rats.All experimental procedures and protocols were approved by the Experimental Animal Ethics Committee of Academy of Military Medical Science of China(approval No.NBCDSER-IACUC-2015128)in December 2015. 展开更多
关键词 ISOFLURANE postoperative cognitive dysfunction hippocampus inverse AGONIST α5 GABAA receptors L-655 708 aged MORRIS Water MAZE memory impairment neural regeneration
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Detection of void and metallic inclusion in 2D piezoelectric cantilever beam using impedance measurements
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作者 S.SAMANTA S.S.S.NANTHAKUMAR +1 位作者 R.K.ANNABATTULA X.ZHUANG 《结构与土木工程前沿:英文版》 EI CSCD 2019年第3期542-556,共15页
The aim of current work is to improve the existing inverse methodology of void-detection based on a target impedance curve,leading to quick-prediction of the parameters of single circular void.In this work,mode-shape ... The aim of current work is to improve the existing inverse methodology of void-detection based on a target impedance curve,leading to quick-prediction of the parameters of single circular void.In this work,mode-shape dependent shifting phenomenon of peaks of impedance curve with change in void location has been analyzed.A number of initial guesses followed by an iterative optimization algorithm based on univariate method has been used to solve the problem.In each iteration starting from each initial guess,the difference between the computationally obtained impedance curve and the target impedance curve has been reduced.This methodology has been extended to detect single circular metallic inclusion in 2D piezoelectric cantilever beam.A good accuracy level was observed for detection of flaw radius and flaw-location along beam-length,but not the precise location along beam-width. 展开更多
关键词 PIEZOELECTRICITY impedance CURVE mode shapes inverse problem FLAW DETECTION CURVE SHIFTING
Dynamic assessment method of air target threat based on improved GIFSS 预览
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作者 FENG Jinfu ZHANG Qiang +1 位作者 HU Junhua LIU An 《系统工程与电子技术:英文版》 SCIE EI CSCD 2019年第3期525-534,共10页
As the air combat environment becomes more complicated and changeable, accurate threat assessment of air target has a significant impact on air defense operations. This paper proposes an improved generalized intuition... As the air combat environment becomes more complicated and changeable, accurate threat assessment of air target has a significant impact on air defense operations. This paper proposes an improved generalized intuitionistic fuzzy soft set (GIFSS) method for dynamic assessment of air target threat. Firstly, the threat assessment index is reasonably determined by analyzing the typical characteristics of air targets. Secondly, after the GIFSS at different time is obtained, the index weight is determined by the intuitionistic fuzzy set entropy and the relative entropy theory. Then, the inverse Poisson distribution method is used to determine the weight of time series, and then the time-weighted GIFSS is obtained. Finally, threat assessment of five air targets is carried out by using the improved GIFSS (I-GIFSS) and comparison methods. The validity and superiority of the proposed method are verified by calculation and comparison. 展开更多
关键词 THREAT DYNAMIC assessment generalized intuitionistic FUZZY soft set (GIFSS) intuitionistic FUZZY ENTROPY relative ENTROPY INVERSE POISSON distribution method
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Current Model Analysis of South China Sea Based on Empirical Orthogonal Function(EOF)Decomposition and Prototype Monitoring Data 预览
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作者 WU Wenhua LIU Ming +1 位作者 YU Siyuan WANG Yanlin 《中国海洋大学学报:英文版》 SCIE CAS CSCD 2019年第2期305-316,共12页
Environmental load is the primary factor in the design of offshore engineering structures and ocean current is the principal environmental load that causes underwater structural failure.In computational analysis,the c... Environmental load is the primary factor in the design of offshore engineering structures and ocean current is the principal environmental load that causes underwater structural failure.In computational analysis,the calculation of current load is mainly based on the current profile.The current profile model,which is based on a structural failure criterion,is conducive to decreasing the uncertainty of the current load.In this study,we used prototype monitoring data and the empirical orthogonal function(EOF)method to investigate the current profile in the South China Sea and its correlation with the design of underwater structural strength and the dynamic design of fatigue.The underwater structural strength design takes into account the size of the structure and the service water depth.We propose profiles for the overall and local designs using the inverse first-order reliability method(IFORM).We extracted the characteristic profile current(CPC)of the monitored sea area to solve dynamic design problems such as vortex-induced vibration(VIV).We used random sampling to verify the feasibility of using the EOF method to calculate the CPC from the current data and identified the main problems associated with using the CPC,which deserve close attention in VIV design.Our research conclusions provide direct references for determining current load in this sea area.This analysis method can also be used in the analysis of other sea areas or field variables. 展开更多
关键词 CURRENT PROFILE model failure criteria PROTOTYPE monitoring inverse FIRST-ORDER reliability method(IFORM) Characteristic PROFILE current(CPC)
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Inverse Optimal Control of Evolution Systems and Its Application to Extensible and Shearable Slender Beams 预览
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作者 K.D.Do A.D.Lucey 《自动化学报:英文版》 CSCD 2019年第2期395-409,共15页
An optimal(practical) stabilization problem is formulated in an inverse approach and solved for nonlinear evolution systems in Hilbert spaces. The optimal control design ensures global well-posedness and global practi... An optimal(practical) stabilization problem is formulated in an inverse approach and solved for nonlinear evolution systems in Hilbert spaces. The optimal control design ensures global well-posedness and global practical K∞-exponential stability of the closed-loop system, minimizes a cost functional,which appropriately penalizes both state and control in the sense that it is positive definite(and radially unbounded) in the state and control, without having to solve a Hamilton-Jacobi-Belman equation(HJBE). The Lyapunov functional used in the control design explicitly solves a family of HJBEs. The results are applied to design inverse optimal boundary stabilization control laws for extensible and shearable slender beams governed by fully nonlinear partial differential equations. 展开更多
关键词 BOUNDARY CONTROL evolution system HILBERT space INVERSE optimal CONTROL slender BEAMS
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关于格值滤子的一点注记 预览
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作者 赵虎 张红英 《吉林大学学报:理学版》 CAS 北大核心 2019年第2期253-257,共5页
首先通过反例指出两个格值滤子的乘积不一定是格值滤子,然后对群上的格值滤子定义逆运算和乘法运算,并对有关逆运算和乘法运算的结果进行刻画.
关键词 格值滤子 满群同态 乘法运算
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Health diagnosis of concrete dams using hybrid FWA with RBF-based surrogate model 预览
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作者 Si-qi Dou Jun-jie Li Fei Kang 《水科学与水工程:英文版》 EI CAS CSCD 2019年第3期188-195,共8页
Structural health monitoring is important to ensuring the health and safety of dams.An inverse analysis method based on a novel hybrid fireworks algorithm (FWA) and the radial basis function (RBF) model is proposed to... Structural health monitoring is important to ensuring the health and safety of dams.An inverse analysis method based on a novel hybrid fireworks algorithm (FWA) and the radial basis function (RBF) model is proposed to diagnose the health condition of concrete dams.The damage of concrete dams is diagnosed by identifying the elastic modulus of materials using the displacement changes at different reservoir water levels.FWA is a global optimization intelligent algorithm.The proposed hybrid algorithm combines the FWA with the pattern search algorithm, which has a high capability for local optimization.Examples of benchmark functions and pseudo-experiment examples of concrete dams illustrate that the hybrid FWA improves the convergence speed and robustness of the original algorithm.To address the time consumption problem, an RBF-based surrogate model was established to replace part of the finite element method in inverse analysis.Numerical examples of concrete dams illustrate that the use of an RBF-based surrogate model significantly reduces the computation time of inverse analysis with little influence on identification accuracy.The presented hybrid FWA combined with the RBF network can quickly and accurately determine the elastic modulus of materials, and then determine the health status of the concrete dam. 展开更多
关键词 FIREWORKS algorithm(FWA) RADIAL BASIS function (RBF) network Surrogate model INVERSE analysis Structural HEALTH monitoring
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Design adaptations in a large and deep urban excavation:Case study 预览
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作者 Amir Alipour Abolfazl Eslami 《岩石力学与岩土工程学报:英文版》 CSCD 2019年第2期389-399,共11页
In this paper,design,re-design,and performance of a long-standing very deep excavation,which was originally planned to depth of 38 m,are presented.Over-digging was not planned in the original design,thus the reassessm... In this paper,design,re-design,and performance of a long-standing very deep excavation,which was originally planned to depth of 38 m,are presented.Over-digging was not planned in the original design,thus the reassessment was performed.Two main topics were followed:deepening to increase the maximum depth of an existent excavation from 38 m to 42.5 m,and feasibility for upgrading a predesigned support system from temporary to permanent support system.The geological investigations in the project site illustrated a type of stiff and cemented coarse-grained alluvium.An observational approach with additional geotechnical investigations and in situ tests was applied.Back analyses of stability of an unsupported access ramp,as well as deformation monitoring of walls,were used in order to review geotechnical design parameters that represent the full-scale behavior of the ground.Additional nails and soldier piles together with building mat foundation were implemented as a complementary lateral support in the retaining system.From an engineering point of view,by assuming a corrosion rate of 0.065 mm/a for existent rebars,according to chemical and electrical resistivity tests,the long-term performance of the revised retaining system was verified by static and pseudo-dynamic ultimate limit state analyses.Performance monitoring during the construction shows that the measured deformation is in the lower limit of the prediction. 展开更多
关键词 DEEP EXCAVATION Field observations In SITU tests Support system Adaptive DESIGN INVERSE analysis
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Evaluating the topological charge density with the symmetricmulti-probing method
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作者 熊光仪 张剑波 邹优豪 《中国物理C:英文版》 SCIE CAS CSCD 2019年第3期29-36,共8页
We evaluate the topological charge density of SU(3) gauge fields on a lattice by calculating the trace of the overlap Dirac matrix employing the symmetric multi-probing(SMP) method in 3 modes. Since the topological ch... We evaluate the topological charge density of SU(3) gauge fields on a lattice by calculating the trace of the overlap Dirac matrix employing the symmetric multi-probing(SMP) method in 3 modes. Since the topological charge Q for a given lattice configuration must be an integer number, it is easy to estimate the systematic error(the deviation of Q to the nearest integer). The results demonstrate a high efficiency and accuracy in calculating the trace of the inverse of a large sparse matrix with locality by using the SMP sources when compared to using point sources.We also show the correlation between the errors and probing scheme parameter rmin, as well as lattice volume NL and lattice spacing a. It is found that the computational time for calculating the trace by employing the SMP sources is less dependent on NL than by using point sources. Therefore, the SMP method is very suitable for calculations on large lattices. 展开更多
关键词 lattice QCD TOPOLOGICAL charge PROBING METHOD large SPARSE matrix INVERSE trace
GPR3,GPR6,and GPR12 as novel molecular targets:their biological functions and interaction with cannabidiol
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作者 Alyssa S.Laun Sarah H.Shrader +1 位作者 Kevin J.Brown Zhao-Hui Song 《中国药理学报:英文版》 SCIE CAS CSCD 2019年第3期300-308,共9页
The G protein-coupled receptors 3,6,and 12(GPR3,GPR6,and GPR12)comprise a family of closely related orphan receptors with no con firmed en dogenous liga nds.These receptors are con stitutively active and capable of si... The G protein-coupled receptors 3,6,and 12(GPR3,GPR6,and GPR12)comprise a family of closely related orphan receptors with no con firmed en dogenous liga nds.These receptors are con stitutively active and capable of signaling through G protein-mediated and non-G protein-mediated mechanisms.These orphan receptors have previously been reported to play important roles in many normal physiological functions and to be involved in a variety of pathological conditions.Although they are orphans,GPR3,GPR6,and GPR12 are phylogenetically most closely related to the cannabinoid receptors.Using β-arrestin2 recruitment and cAMP accumulati on assays,we recently found that the non psychoactive phytoca nnabinoid cann abidiol(CBD)is an inverse agonist for GPR3,GPR6,and GPR12.This discovery highlights these orphan receptors as potential new molecular targets for CBD,provides novel mechanisms of action,and suggests new therapeutic uses of CBD for illnesses such as Alzheimer's disease,Parkinson's disease,can cer,and infertility.Furthermore,identificati on of CBD as a new in verse agonist for GPR3,GPR6,and GPR12 provides the initial chemical scaffolds upon which potent and efficacious agents acting on these receptors can be developed,with the goal of developing chemical tools for studying these orphan receptors and ultimately new therapeutic agents. 展开更多
关键词 ORPHAN receptors GPR3 GPR6 GPR12 CANNABIDIOL inverse AGONIST eurite OUTGROWTH Alzheimer's disease NEUROPATHIC pain obesity INFERTILITY
Computational study of inverse ferrite spinels
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作者 A EL Maazouzi R Masrour +1 位作者 A Jabar M Hamedoun 《中国物理B:英文版》 SCIE EI CAS CSCD 2019年第5期305-311,共7页
The magnetic properties of inverse ferrite (Fe^3+)[Fe^3+Co^2+]O4^2-,(Fe^3+)[Fe^3+Cu^2+]O4^2,( Fe^3+)[Fe^3+Fe^2+]O4^2,and (Fe^3+)[Fe^3+Ni^2+]O4^2- spinels have been studied using Monte Carlo simulation.We have also cal... The magnetic properties of inverse ferrite (Fe^3+)[Fe^3+Co^2+]O4^2-,(Fe^3+)[Fe^3+Cu^2+]O4^2,( Fe^3+)[Fe^3+Fe^2+]O4^2,and (Fe^3+)[Fe^3+Ni^2+]O4^2- spinels have been studied using Monte Carlo simulation.We have also calculated the critical and Curie Weiss temperatures from the thermal magnetizations and inverse of magnetic susceptibilities for each system.Magnetic hysteresis cycles have been found for the four systems.Finally,we found the critical exponents associated with magnetization,magnetic susceptibility,and external magnetic field.Our results of critical and Curie Weiss temperatures are similar to those obtained by experiment results.The critical exponents are similar to those of known 3D-Ising model. 展开更多
关键词 INVERSE ferrites SPINELS Monte Carlo simulation CRITICAL and CURIE Weiss temperatures magnetic HYSTERESIS cycles CRITICAL EXPONENTS
Inverse identification of the mechanical parameters of a pipeline hoop and analysis of the effect of preload
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作者 Ye GAO Wei SUN 《机械工程前沿:英文版》 CSCD 2019年第3期358-368,共11页
To create a dynamic model of a pipeline system effectively and analyze its vibration characteristics, the mechanical characteristic parameters of the pipeline hoop, such as support stiffness and damping under dynamic ... To create a dynamic model of a pipeline system effectively and analyze its vibration characteristics, the mechanical characteristic parameters of the pipeline hoop, such as support stiffness and damping under dynamic load, must be obtained. In this study, an inverse method was developed by utilizing measured vibration data to identify the support stiffiiess and damping of a hoop. The procedure of identifying such parameters was described based on the measured natural frequencies and amplitudes of the frequency response functions (FRFs) of a pipeline system supported by two hoops. A dynamic model of the pipe-hoop system was built with the finite element method, and the formulas for solving the FRF of the pipeline system were provided. On the premise of selecting initial values reasonably, an inverse identification algorithm based on sensitivity analysis was proposed. A case study was performed, and the mechanical parameters of the hoop were identified using the proposed method. After introducing the identified values into the analysis model, the reliability of the identification results was validated by comparing the predicted and measured FRFs of the pipeline. Then, the developed method was used to identify the support stiffness and damping of the pipeline hoop under different preloads of the bolts. The influence of preload was also discussed. Results indicated that the support stiffiiess and damping of the hoop exhibited frequency-dependent characteristics. When the preloads of the bolts increased, the support stiffness increased, whereas the support damping decreased. 展开更多
关键词 INVERSE identification PIPELINE HOOP fiequency response function MECHANICAL PARAMETERS PRELOAD
Inverse opal manganese dioxide constructed by few-layered ultrathin nanosheets as high-performance cathodes for aqueous zinc-ion batteries
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作者 Hao Ren Jin Zhao +3 位作者 Lan Yang Qinghua Liang Srinivasan Madhavi Qingyu Yan 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第6期1347-1353,共7页
Considering the high safety,low-cost and high capacity,aqueous zinc ion batteries have been a potential candidate for energy storage ensuring smooth electricity supply.Herein,we have synthesized inverse opal manganese... Considering the high safety,low-cost and high capacity,aqueous zinc ion batteries have been a potential candidate for energy storage ensuring smooth electricity supply.Herein,we have synthesized inverse opal manganese dioxide constructed by few-layered ultrathin nanosheets by a solution template method at mild temperature.The ultrathin nanosheets with the thickness as small as 1 nm are well separated without obvious aggregation.Used as cathode material for aqueous zinc ion batteries,the few-layered ultrathin nanosheets combined with the inverse opal structure guarantee excellent performance.A high specific discharge capacity of 262.9 mAh·g^-1 is retained for the 100th cycle at a current density of 300 mA·g^-1 with a high capacity retention of 95.6%.A high specific discharge capacity of 121 mAh·g^-1 at a high current density of 2,000 mA·g^-1 is achieved even after 5,000 long-term cycles.The ex-situ X-ray diffraction (XRD) patterns,selected-area electron diffraction (SAED) patterns and high-resolution transmission electron microscopy (HRTEM) results demonstrate that the discharge/charge processes involve the reversible formation of zinc sulfate hydroxide hydrate on the cathode while in-plane crystal structure of the layered bimessite MnO2 could be maintained.This unique structured MnO2 is a promising candidate as cathode material for high capacity,high rate capability and long-term aqueous zinc-ion batteries. 展开更多
关键词 inverse OPAL ULTRATHIN few-layered NANOSHEETS MnO2 zinc ion batteries
Integrative analysis of the inverse expression patterns in pancreas development and cancer progression 预览
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作者 Hong-Liang Zang Guo-Min Huang +1 位作者 Hai-Ying Ju Xiao-Feng Tia 《世界胃肠病学杂志:英文版》 SCIE CAS 2019年第32期4727-4738,共12页
BACKGROUND As the malignant tumor,pancreatic cancer with a meager 5-years survival rate has been widely concerning.However,the molecular mechanisms that result in malignant transformation of pancreatic cells remain el... BACKGROUND As the malignant tumor,pancreatic cancer with a meager 5-years survival rate has been widely concerning.However,the molecular mechanisms that result in malignant transformation of pancreatic cells remain elusive.AIM To investigate the gene expression profiles in normal or malignant transformed pancreas development.METHODS MaSigPro and ANOVA were performed on two pancreas development datasets downloaded from the Gene Expression Omnibus database.Six pancreatic cancer datasets collected from TCGA database were used to establish differentially expressed genes related to pancreas development and pancreatic cancer.Moreover,gene clusters with highly similar interpretation patterns between pancreas development and pancreatic cancer progression were established by self-organizing map and singular value decomposition.Additionally,the hypergeometric test was performed to compare the corresponding interpretation patterns.Abnormal regions of metabolic pathway were analyzed using the Subpathway-GM method.RESULTS This study established the continuously upregulated and downregulated genes at different stages in pancreas development and progression of pancreatic cancer.Through analysis of the differentially expressed genes,we established the inverse and consistent direction development-cancer pattern associations.Based on the application of the Subpathway-GM analysis,we established 17 significant metabolic sub-pathways that were closely associated with pancreatic cancer.Of note,the most significant metabolites sub-pathway was related to glycerophospholipid metabolism.CONCLUSION The inverse and consistent direction development-cancer pattern associations were established.There was a significant correlation in the inverse patterns,but not consistent direction patterns. 展开更多
关键词 PANCREATIC CANCER PANCREAS development INVERSE PATTERN METABOLITES subpathway
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Novel Low-Complexity Low-Latency Orthogonal Frequency Division Multiplexing Transmitter
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作者 LIU Sanjun HUANG Shuanglin +3 位作者 LI Min DONG Xiaojie QIU Da YANG Rui 《武汉大学学报:自然科学英文版》 CAS CSCD 2019年第1期71-78,共8页
Traditional orthogonal frequency division multiplexing(OFDM)transmitter is implemented by exploiting inverse fast Fourier transform(IFFT),up-sampling,and low pass shaping filter(LPSF)modules,which occupy a large numbe... Traditional orthogonal frequency division multiplexing(OFDM)transmitter is implemented by exploiting inverse fast Fourier transform(IFFT),up-sampling,and low pass shaping filter(LPSF)modules,which occupy a large number of hardware resources and severely lower down the operation speed.To address these limitations,we propose a novel OFDM transmitter architecture,by which the aforementioned modules can be discarded and replaced with some simple switches.In the proposed architecture,direct digital synthesis(DDS)method is employed to generate digital sub-carriers and to transform OFDM data from frequency domain to time domain.Through some sophisticated simplifications,the proposed architecture can avoid using multipliers and remarkably save hardware resources.Finally,comparative experiments are carried out on field programmable gate array(FPGA)platform which demonstrates that our DDS-based architecture saves more than half of the hardware resources and doubles the achievable maximum frequency compared with traditional structure. 展开更多
关键词 ORTHOGONAL frequency DIVISION MULTIPLEXING inverse fast Fourier transform(IFFT) direct digital synthesis wireless communication
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