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Pressure and Time Dependences of the Supercooled Liquid-to-Liquid Transition in Sulfur 被引量:1
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作者 张豆豆 刘秀茹 +1 位作者 何竹 洪时明 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第2期83-86,共4页
Thermal behavior of bulk amorphous sulfur is investigated by in situ temperature measurements at high pressures of 0.9, 1.4 and 2.1 GPa, and under different heating rates of 8, 10 and 12K/min at 0.9 GPa. The results s... Thermal behavior of bulk amorphous sulfur is investigated by in situ temperature measurements at high pressures of 0.9, 1.4 and 2.1 GPa, and under different heating rates of 8, 10 and 12K/min at 0.9 GPa. The results show that the onset temperature of the transition from the supercooled Hquid to the liquid state for sulfur increases with the pressure and the heating rate. It is deduced that the transition does not follow the Clapeyron equation, indicating considerable coupling of the molecular structure change in the transition. Along with the data at ambient pressure and high pressure, we present a dynamic diagram to demonstrate the relationship between the amorphous solid, supercooled liquid, liquid, and crystal phases of sulfur, and suggest an experimental approach to establish pressure-temperature-time transition diagrams for supercooled liquid and liquid. 展开更多
关键词 of on IT Pressure and time dependences of the Supercooled Liquid-to-Liquid Transition in Sulfur in that for IS
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Timelessness and Time Dependence of Human Consciousness From a Scientific Western Viewpoint
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作者 Franz Klaus Jansen 《Journal of Philosophy Study》 2014年第8期525-536,共12页
Eastern philosophy and western science have convergent and divergent viewpoints for their explanation of consciousness. Convergence is found for the practice of meditation allowing besides a time dependent consciousne... Eastern philosophy and western science have convergent and divergent viewpoints for their explanation of consciousness. Convergence is found for the practice of meditation allowing besides a time dependent consciousness, the experience of a timeless consciousness and its beneficial effect on psychological wellbeing and medical improvements, which are confirmed by multiple scientific publications. Theories of quantum mechanics with non-locality and timelessness also show astonishing correlation to eastern philosophy, such as the theory of Penrose-Hameroff (ORC-OR), which explains consciousness by reduction of quantum superposition in the brain. Divergence appears in the interpretation of the subjective experience of timeless consciousness. In eastern philosophy, meditation at a higher level of awareness allows the personal experience of timeless and non-dual consciousness, considered as an empirical proof for the existence of pure consciousness or spirituality existing before the material world and creating it by design. Western science acknowledges the subjective, non-dual experience, and its multiple beneficial effects, however, the interpretation of spirituality designing the material universe is in disagreement with the Darwinian Theory of mutation and selection. A design should create an ideal universe without the injustice of 3% congenital birth defects and later genetic health problems. The western viewpoint of selection is more adapted to explain congenital errors. The gap between subjectivity and objectivity, the mind-body problem, is in eastern philosophy reduced to the dominance of subjectivity over objectivity, whereas western science attributes equal values to both. Nevertheless, there remains an astonishing complementarity between eastern and western practices. 展开更多
关键词 CONSCIOUSNESS MEDITATION timelessness time dependence quantum mechanics eastern philosophy western philosophy of science
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The Time and Regime Dependencies of Sensitive Areas for Tropical Cyclone Prediction Using the CNOP Method 被引量:11
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作者 周菲凡 穆穆 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2012年第4期705-716,共12页
This study examines the time and regime dependencies of sensitive areas identified by the conditional nonlinear optiflml perturbation (CNOP) method for forecasts of two typhoons. Typhoon Meari (2004) was weakly no... This study examines the time and regime dependencies of sensitive areas identified by the conditional nonlinear optiflml perturbation (CNOP) method for forecasts of two typhoons. Typhoon Meari (2004) was weakly nonlinear and is herein referred to as the linear case, while Typhoon Matsa (2005) was strongly nonlinear and is herein referred to as the nonlinear case. In the linear case, the sensitive areas identified for special forecast times when the initial time was fixed resembled those identified for other forecast times. Targeted observations deployed to improve a special time forecast would thus also benefit forecasts at other times. In the nonlinear case, the similarities among the sensitive areas identified for different forecast times were more limited. The deployment of targeted observations in the nonlinear case would therefore need to be adapted to achieve large improvements for different targeted forecasts. For both cases, the closer the forecast time, the higher the similarities of the sensitive areas. When the forecast time was fixed, the sensitive areas in the linear case diverged continuously from the verification area as the forecast period lengthened, while those in the nonlinear case were always located around the initial cyclones. The deployment of targeted observations to improve a special forecast depends strongly on the time of deployment. An examination of the efficiency gained by reducing initial errors within the identified sensitive areas confirmed these results. In general, the greatest improvement in a special time forecast was obtained by identifying the sensitive areas for the corresponding forecast time period. 展开更多
关键词 time dependence CNOP sensitive area TYPHOON targeted observations
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Uniaxial Time-Dependent Ratcheting of SS304 Stainless Steel at High Temperatures 被引量:4
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作者 KANG Guo-zheng ZHANG Juan SUN Ya-fang KAN Qian-hua 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2007年第1期53-59,共7页
The uniaxial time-dependent strain cyclic behaviors and ratcheting of SS304 stainless steel were studied at high temperatures (350 ℃ and 700 ℃). The effects of straining and stressing rates, holding time at the pe... The uniaxial time-dependent strain cyclic behaviors and ratcheting of SS304 stainless steel were studied at high temperatures (350 ℃ and 700 ℃). The effects of straining and stressing rates, holding time at the peak and/or valley of each cycle in addition to ambient temperature on the cyclic softening/hardening behavior and ratcheting of the material were discussed. It can be seen from experimental results that the material presents remarkable time dependence at 700 ℃, and the ratcheting strain depends greatly on the stressing rate, holding time and ambient temperature. Some significant conclusions are obtained, which are useful to build a constitutive model describiog the time-dependent cyclic deformation of the material. 展开更多
关键词 SS304 stainless steel time dependence RATCHETING high temperature
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The Lightweight Edge-Side Fault Diagnosis Approach Based on Spiking Neural Network
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作者 Jingting Mei Yang Yang +2 位作者 Zhipeng Gao Lanlan Rui Yijing Lin 《Computers, Materials & Continua》 SCIE EI 2024年第6期4883-4904,共22页
Network fault diagnosis methods play a vital role in maintaining network service quality and enhancing user experience as an integral component of intelligent network management.Considering the unique characteristics ... Network fault diagnosis methods play a vital role in maintaining network service quality and enhancing user experience as an integral component of intelligent network management.Considering the unique characteristics of edge networks,such as limited resources,complex network faults,and the need for high real-time performance,enhancing and optimizing existing network fault diagnosis methods is necessary.Therefore,this paper proposes the lightweight edge-side fault diagnosis approach based on a spiking neural network(LSNN).Firstly,we use the Izhikevich neurons model to replace the Leaky Integrate and Fire(LIF)neurons model in the LSNN model.Izhikevich neurons inherit the simplicity of LIF neurons but also possess richer behavioral characteristics and flexibility to handle diverse data inputs.Inspired by Fast Spiking Interneurons(FSIs)with a high-frequency firing pattern,we use the parameters of FSIs.Secondly,inspired by the connection mode based on spiking dynamics in the basal ganglia(BG)area of the brain,we propose the pruning approach based on the FSIs of the BG in LSNN to improve computational efficiency and reduce the demand for computing resources and energy consumption.Furthermore,we propose a multiple iterative Dynamic Spike Timing Dependent Plasticity(DSTDP)algorithm to enhance the accuracy of the LSNN model.Experiments on two server fault datasets demonstrate significant precision,recall,and F1 improvements across three diagnosis dimensions.Simultaneously,lightweight indicators such as Params and FLOPs significantly reduced,showcasing the LSNN’s advanced performance and model efficiency.To conclude,experiment results on a pair of datasets indicate that the LSNN model surpasses traditional models and achieves cutting-edge outcomes in network fault diagnosis tasks. 展开更多
关键词 Network fault diagnosis edge networks Izhikevich neurons PRUNING dynamic spike timing dependent plasticity learning
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Spin-Unrestricted Multi-Configuration Time-Dependent Hartree Fock Theory
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作者 李文亮 卞继承 杨磊 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2014年第2期175-180,I0003,共7页
Based on spin-unrestricted hartree fock theory, we present the spin unrestricted multi- configuration time dependent hartree lock theory (UMCTDHF) to describe the electron correlation dynamics of systems interacting... Based on spin-unrestricted hartree fock theory, we present the spin unrestricted multi- configuration time dependent hartree lock theory (UMCTDHF) to describe the electron correlation dynamics of systems interacting with laser field. The positive spin orbitals and the negative spin orbitals are propagated in their own subspace respectively. The spin orbital in the spin-down subspace acts with that in the spin-up subspace by the reduced density matrix and mean field operator. The ground energy is acquired by propagating the trial wave function in the imaginary time by using spin-restricted MCTDHF (RMCTDHF) and UMCTDHF respectively. Then the ionization probabilities and the electrons energies are calculated by using RMCTDHF and UMCTDHF when the laser field is present. The ionization probability calculated with UMCTDHF agrees with the previous theoretical reports very well. The UMCTDHF method is accurate and applicable for open shell system beyond the capability of the RMCTDHF method. 展开更多
关键词 Multi-configuration time dependent hartree fock theory Electron-electroncorrelated Strong laser field Spin-unrestricted
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Zeno and the Wrong Understanding of Motion—A Philosophical-Mathematical Inquiry into the Concept of Finitude as a Peculiarity of Infinity
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作者 Andreas Herberg-Rothe 《Journal of Applied Mathematics and Physics》 2024年第3期912-929,共18页
In contrast to the solutions of applied mathematics to Zeno’s paradoxes, I focus on the concept of motion and show that, by distinguishing two different forms of motion, Zeno’s apparent paradoxes are not paradoxical... In contrast to the solutions of applied mathematics to Zeno’s paradoxes, I focus on the concept of motion and show that, by distinguishing two different forms of motion, Zeno’s apparent paradoxes are not paradoxical at all. Zeno’s paradoxes indirectly prove that distances are not composed of extensionless points and, in general, that a higher dimension cannot be completely composed of lower ones. Conversely, lower dimensions can be understood as special cases of higher dimensions. To illustrate this approach, I consider Cantor’s only apparent proof that the real numbers are uncountable. However, his widely accepted indirect proof has the disadvantage that it depends on whether there is another way to make the real numbers countable. Cantor rightly assumes that there can be no smallest number between 0 and 1, and therefore no beginning of counting. For this reason he arbitrarily lists the real numbers in order to show with his diagonal method that this list can never be complete. The situation is different if we start with the largest number between 0 and 1 (0.999…) and use the method of an inverted triangle, which can be understood as a special fractal form. Here we can construct a vertical and a horizontal stratification with which it is actually possible to construct all real numbers between 0 and 1 without exception. Each column is infinite, and each number in that column is the starting point of a new triangle, while each row is finite. Even in a simple sine curve, we experience finiteness with respect to the y-axis and infinity with respect to the x-axis. The first parts of this article show that Zeno’s assumptions contradict the concept of motion as such, so it is not surprising that this misconstruction leads to contradictions. In the last part, I discuss Cantor’s diagonal method and explain the method of an inverted triangle that is internally structured like a fractal by repeating this inverted triangle at each column. The consequence is that we encounter two very different methods of counting. Vertically it is continuous, horizontally it is discrete. While Frege, Tarski, Cantor, Gödel and the Vienna Circle tried to derive the higher dimension from the lower, a procedure that always leads to new contradictions and antinomies (Tarski, Russell), I take the opposite approach here, in which I derive the lower dimension from the higher. This perspective seems to fail because Tarski, Russell, Wittgenstein, and especially the Vienna Circle have shown that the completeness of the absolute itself is logically contradictory. For this reason, we agree with Hegel in assuming that we can never fully comprehend the Absolute, but only its particular manifestations—otherwise we would be putting ourselves in the place of the Absolute, or even God. Nevertheless, we can understand the Absolute in its particular expressions, as I will show with the modest example of the triangle proof of the combined horizontal and vertical countability of the real numbers, which I developed in rejection of Cantor’s diagonal proof. . 展开更多
关键词 Zeno False Assumptions about Motion Finitude INFINITY Cantor’s Diagonal Method Inverted Triangle as a Different Method Vertical and Horizontal Dimensions Quantum Theory Relativity of Space and time Depending on Velocity
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Multi-type ant system algorithm for the time dependent vehicle routing problem with time windows 被引量:14
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作者 DENG Ye ZHU Wanhong +1 位作者 LI Hongwei ZHENG Yonghui 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2018年第3期625-638,共14页
The time dependent vehicle routing problem with time windows(TDVRPTW) is considered. A multi-type ant system(MTAS) algorithm hybridized with the ant colony system(ACS)and the max-min ant system(MMAS) algorithm... The time dependent vehicle routing problem with time windows(TDVRPTW) is considered. A multi-type ant system(MTAS) algorithm hybridized with the ant colony system(ACS)and the max-min ant system(MMAS) algorithms is proposed. This combination absorbs the merits of the two algorithms in solutions construction and optimization separately. In order to improve the efficiency of the insertion procedure, a nearest neighbor selection(NNS) mechanism, an insertion local search procedure and a local optimization procedure are specified in detail. And in order to find a balance between good scouting performance and fast convergence rate, an adaptive pheromone updating strategy is proposed in the MTAS. Computational results confirm the MTAS algorithm's good performance with all these strategies on classic vehicle routing problem with time windows(VRPTW) benchmark instances and the TDVRPTW instances, and some better results especially for the number of vehicles and travel times of the best solutions are obtained in comparison with the previous research. 展开更多
关键词 multi-type ant system(MTAS) time dependent vehicle routing problem with time windows(VRPTW) nearest neighbor selection(NNS)
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Time Dependent Chloride Diffusion Coefficient in Concrete 被引量:4
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作者 宋鲁光 孙伟 GAO Jianming 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2013年第2期314-319,共6页
In order to study how to correctly apply the two different time dependencies to service life prediction models, the definition of parameters in the time dependent equation using the long-term test method and the short... In order to study how to correctly apply the two different time dependencies to service life prediction models, the definition of parameters in the time dependent equation using the long-term test method and the short-term test method, and its relationship were discussed. The experimental results show that, as the two time dependencies have different meanings, they have different manners when handled in service life prediction models. Time dependency of chloride diffusion coefficients in concrete was obtained by fitting experimental data. A large number of accurate experimental data were required to fit the formula of time dependency to ensure the accuracy of service life prediction model. 展开更多
关键词 CONCRETE time dependency chloride diffusion coefficient
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A time-dependent measuring system for welding deformation 被引量:2
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作者 蔡志鹏 赵海燕 +2 位作者 鹿安理 史清宇 施光凯 《China Welding》 EI CAS 2002年第1期25-28,共4页
In this paper the establishment and application of a time dependent measuring system for welding deformation are presented which is established with high quality sensors shielded from strong welding interference. By ... In this paper the establishment and application of a time dependent measuring system for welding deformation are presented which is established with high quality sensors shielded from strong welding interference. By using this system, vertical and horizontal displacements of the high temperature area are surveyed at the same time. And this system is also used for monitoring and controlling the deformation of real welded structures. 展开更多
关键词 time dependent measuring system welding deformation
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Spectral Method for Solving Time Dependent Flow of Upper-Convected Maxwell Fluid in Tube 被引量:1
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作者 付强 张春雨 韩式方 《Journal of Modern Transportation》 2001年第2期130-137,共8页
The ti me dependent flow of upper-convected Maxwell fluid in a horizontal circular pip e is studied by spectral method. The time dependent problem is mathematically re duced to a partial differential equation of seco... The ti me dependent flow of upper-convected Maxwell fluid in a horizontal circular pip e is studied by spectral method. The time dependent problem is mathematically re duced to a partial differential equation of second order. By using spectral meth od the partial differential equation can be reduced to a system of ordinary diff erential equations for different terms of Chebyshev polynomials approximations. The ordinary differential equations are solved by Laplace transform and the eige nvalue method that leads to an analytical form of the solutions. 展开更多
关键词 spectral method time dependent flow Chebyshev polynomial
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Alternative Approach to Time Evaluation of Schrodinger Wave Functions 被引量:1
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作者 Mustafa Erol 《Journal of Modern Physics》 2012年第11期1716-1721,共6页
Time evaluation of wave functions for any quantum mechanical system/particle is essential nevertheless quantum mechanical counterpart of the time dependant classical wave equation does simply not appear. Epistemologic... Time evaluation of wave functions for any quantum mechanical system/particle is essential nevertheless quantum mechanical counterpart of the time dependant classical wave equation does simply not appear. Epistemologically and ontologically considered time dependant momentum operator is initially defined and an Alternative Time Dependant Schrodinger Wave Equation (ATDSWE) is plainly derived. Consequent equation is primarily solved for the free particles, in a closed system, signifying a good agreement with the outcomes of the ordinary TDSWE. Free particle solution interestingly goes further possibly tracing some signs of new pathways to resolve the mysterious quantum world. 展开更多
关键词 time Dependant Schrodinger Wave Equation Wave Function Evolution Quantum Theory Quantum Philosophy
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Modelling of Time Dependency of Chloride Diffusion Coefficient in Cement Paste
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作者 张明中 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第4期687-691,共5页
A computer-based model and method was presented to predict the time dependency of chloride diffusion coefficients in cement paste. The HYMOSTRUC3D model was applied to generate a 3D representative elementary volume (... A computer-based model and method was presented to predict the time dependency of chloride diffusion coefficients in cement paste. The HYMOSTRUC3D model was applied to generate a 3D representative elementary volume (REV) of cement paste. In the simulation of microstructure, both of cement hydration and chloride binding were considered. With the simulated microstructure of cement paste, the finite element method was applied to simulate the diffusion process of chloride through the saturated cement paste. Based on the Fick’s first law, the chloride diffusion coefficient can be calculated. In this method, the influences of age and w/c ratio on the chloride diffusion coefficient were evaluated. The simulated chloride diffusivities with various w/c at different time were compared to experimental data obtained from the literature. The experimental results indicate that the chloride diffusion coefficient decreases with the increase of time and the decrease of w/c ratio. The trend of simulated relationship (diffusion coefficient vs time, diffusion coefficient vs w/c ratio) fits very well with the experiments. 展开更多
关键词 cement paste time dependency chloride diffusion coefficient chloride binding HYMOSTRUC3D
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Influence of Neodymium on Amorphizability of RS Al-Fe-V-Si-Nd Alloys:An Investigation Using Time Dependent Nucleation Theory
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作者 庞华 郑立净 +1 位作者 张宝金 曾梅光 《Journal of Rare Earths》 SCIE EI CAS CSCD 2000年第4期293-297,共5页
Time dependent nucleation theory was applied to calculate the incubation time required for α Al nucleation in rapid solidified (RS) Al Fe V Si Nd alloys. The nucleation rates were calculated as a function of tem... Time dependent nucleation theory was applied to calculate the incubation time required for α Al nucleation in rapid solidified (RS) Al Fe V Si Nd alloys. The nucleation rates were calculated as a function of temperature, and the critical cooling rates required for the formation of amorphous α Al at different neodymium concentrations were calculated too. The addition of neodymium increases the amorphizablity of α Al by increasing the incubation time and decreasing the nucleation rate and the critical cooling rate. The calculations are fitted to experimental results when liquidus temperatures are estimated from an approximation, which treats Al Fe V Si Nd as quasi binary Al Fe system. 展开更多
关键词 rare earths NEODYMIUM amorphizablity Al Fe V Si Nd alloys time dependent nucleation theory rapid solidified processi?
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Random Time Dependent Resistance Analysis on Reinforced Concrete Structures
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作者 管昌生 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2002年第4期58-60,共3页
The analysis method on random time dependence of reinforced concrete material is introduced,the effect mechanism on reinforced concrete are discussed,and the random time dependence resistance of reinforced concrete is... The analysis method on random time dependence of reinforced concrete material is introduced,the effect mechanism on reinforced concrete are discussed,and the random time dependence resistance of reinforced concrete is studied.Furthermore,the corrosion of steel bar in reinforced concrete structures is analyzed.A practical statistical method of evaluating the random time dependent resistance,which includes material,structural size and calculation influence,is also established.In addition,an example of predicting random time dependent resistance of reinforced concrete structural element is given. 展开更多
关键词 random analysis time dependent resistance reinforced concrete
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Einstein-Podolsky-Rosen entanglement in time-dependent broadband pumping frequency non-degenerate optical parametric amplifier
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作者 赵超樱 谭维翰 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第1期128-131,共4页
This paper investigates quantum fluctuations characteristic of time-dependent broadband pumping frequency non-degenerate optical parametric amplifier for below and above threshold regions. It finds that a high squeezi... This paper investigates quantum fluctuations characteristic of time-dependent broadband pumping frequency non-degenerate optical parametric amplifier for below and above threshold regions. It finds that a high squeezing and entanglement can be achieved. 展开更多
关键词 time dependent broadband pumping ENTANGLEMENT frequency non-degenerate opticalparametric amplifier
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Influence of multi-deposition multi-annealing on time-dependent dielectric breakdown characteristics of PMOS with high-k/metal gate last process
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作者 王艳蓉 杨红 +10 位作者 徐昊 王晓磊 罗维春 祁路伟 张淑祥 王文武 闫江 朱慧珑 赵超 陈大鹏 叶甜春 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第11期464-467,共4页
A multi-deposition multi-annealing technique (MDMA) is introduced into the process of high-k/metal gate MOSFET for the gate last process to effectively reduce the gate leakage and improve the device's performance. ... A multi-deposition multi-annealing technique (MDMA) is introduced into the process of high-k/metal gate MOSFET for the gate last process to effectively reduce the gate leakage and improve the device's performance. In this paper, we systematically investigate the electrical parameters and the time-dependent dielectric breakdown (TDDB) characteristics of positive channel metal oxide semiconductor (PMOS) under different MDMA process conditions, including the depo- sition/annealing (D&A) cycles, the D&A time, and the total annealing time. The results show that the increases of the number of D&A cycles (from 1 to 2) and D&A time (from 15 s to 30 s) can contribute to the results that the gate leakage current decreases by about one order of magnitude and that the time to fail (TTF) at 63.2% increases by about several times. However, too many D&A cycles (such as 4 cycles) make the equivalent oxide thickness (EOT) increase by about 1A and the TTF of PMOS worsen. Moreover, different D&A times and numbers of D&A cycles induce different breakdown mechanisms. 展开更多
关键词 high-k/metal gate time dependent dielectric breakdown multi-deposition multi-annealing
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Reaction Subdiffusion with Random Waiting Time Depending on the Preceding Jump Length
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作者 Hong Zhang Guo-Hua Li 《Chinese Physics Letters》 SCIE CAS CSCD 2018年第9期19-23,共5页
To describe the energy-dependent characteristics of the reaction-subdiffusion process, we analyze the simple reaction A--→B under subdiffsion with waiting time depending on the preceding jump length, and derive the c... To describe the energy-dependent characteristics of the reaction-subdiffusion process, we analyze the simple reaction A--→B under subdiffsion with waiting time depending on the preceding jump length, and derive the corresponding master equations in the Fourier Laplace space for the distribution of A and B particles in a continuous time random walk scheme. Moreover, the generalizations of the reaction-diffusion equation for the Gaussian jump length with the probability density function of waiting time being quadratically dependent on the preceding jump length are obtained by applying the derived master equations. 展开更多
关键词 RDE Reaction Subdiffusion with Random Waiting time Depending on the Preceding Jump Length LENGTH
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Temperature dependence of the luminescence properties of LaCl3:Ce crystal
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作者 裴钰 陈晓峰 +2 位作者 秦来顺 姚冬敏 任国浩 《Chinese Physics B》 SCIE EI CAS CSCD 2006年第11期2756-2760,共5页
The optical properties of LaCl3:Ce crystal are reported in this paper. Optical transmission spectrum, photoluminescence and time resolved photoluminescence spectra at different temperatures are investigated. It is fo... The optical properties of LaCl3:Ce crystal are reported in this paper. Optical transmission spectrum, photoluminescence and time resolved photoluminescence spectra at different temperatures are investigated. It is found that optical transmittance is as high as 80% between 320 nm and 600 nm, and no obvious absorption band is found in this region. Emission intensity and decay time of photoluminescence are quite stable with the change of the temperature between 80 K and 500 K. No thermal quenching is present up to 500 K, and decay time keeps at 17±2 ns. With the increase of the temperature, the whole emission bands and excitation bands present broadening and overlapping, leading to the strengthening of re-absorption of the Ce^3+ emission, which makes the emission spectra have a red shift trend. 展开更多
关键词 LACL3 scintillator TRANSMITTANCE PHOTOLUMINESCENCE decay time temperature dependence
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Role of Exogenous Reduced Glutathione on Time Dependent ^(203)Hg Distribution in Liver and Kidney of a Freshwater Teleost, Anabas testudineus
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作者 DEBAPRIYA SARKAR DERAPRASAD DAS +1 位作者 AND SHELLEY BHATTACHARYA (Environmental Toxicology Laboratory, Department of Zoology, Visva Bharati University, Santiniketan 731235, India) 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 1997年第1期60-64,共5页
Time-dependent tissue distribution of mercury(Hg) was studied in a freshwater perch,Anabas testudineus which revealed that the liver and kidneys are the major sites of Hg reten tion. The role of reduced glutathione (... Time-dependent tissue distribution of mercury(Hg) was studied in a freshwater perch,Anabas testudineus which revealed that the liver and kidneys are the major sites of Hg reten tion. The role of reduced glutathione (GSH) in the clearance of Hg was also investigated to e valuate the ameliorative effect of this nucleophile. For this purpose, the perch was given GSH 15 min before or after they received 203Hg by injection. The fish were then sacrificed at 24 h and 48 h later. The results clearly indicate that exogenous GSH can significantly reduce Hg retention in both the liver and kidneys, demonstrating a direct role of this nucleophile in the amelioration of Hg-induced toxicity in the early phase of intoxication 展开更多
关键词 Hg Distribution in Liver and Kidney of a Freshwater Teleost Anabas testudineus Role of Exogenous Reduced Glutathione on time Dependent
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