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Model for Influences of Magnetic Fields on Intracellular Calcium Oscillations

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Communications in Theoretical Physics 2009年第7期52卷 168-172页

作者： ZHANG Yu-Hong ZHAN Yong ZHAO tong-Jun CHEN Ya-Fei YUAN chang-qing School of Sciences Hebei University of Technology Tianjin 300130 China

Based on the model of the two calcium stores developed by Goldbeter, the influence of external magnetic field on the calcium concentration has been discussed. We believe that the cell membrane is a major site of interaction for extremely-low-frequency （ELF） electromagnetic fields, and the permeability of ions can be changed with the changing electromagnetic fields. It is shown that magnetic field initiates intraeellular calcium oscillation with a threshold in flux density, and that the calcium oscillations do not occur if the density of magnetic field is below the threshold. The results of theoretical calculation are consistent with that of the experiment. The intracellular free calcium concentrations of different cells exposed to the same magnetic fields are different from each other. It is indicated that the different behaviors such as oscillation, rise and invariability of calcium concentration are associated with the sort of cells.

关键词： calcium oscillation magnetic fields calcium concentration

Effect of polysaccharide fractions from Fortunella margarita on the fecal microbiota of mice and SCFA production in vitro

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Food Science and Human Wellness 2022年第1期11卷 97-108页

作者： Peilin Chen Suzhen Lei Mingyao tong qing chang Baodong Zheng Yi Zhang Hongliang Zeng College of Food Science Fujian Agriculture and Forestry UniversityFuzhou 350002China Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch Fujian Agriculture and Forestry UniversityFuzhou 350002China China-Ireland International Cooperation Centre for Food Material Science and Structure Design Fujian Agriculture and Forestry UniversityFuzhou 350002China

Fortunella margarita polysaccharides(FMPS)are composed of 4 polysaccharide fragments,namely mannogalactoglucan,galactoglucan,glucan and *** study investigated the in vitro fermentation of FMPS fractions and their effect on the fecal microbiota of mice and short chain fatty acids(SCFAs)*** results showed that the structure of the fecal microbiota was changed after FMPS *** the phylum level,the polysaccharide fractions reduced the relative abundance of Bacteroidetes compared with the inulin *** the genus level,the polysaccharide fractions increased the abundance of Lactobacillus,and decreased the abundance of Granulicatella,Proteus and *** fractions could promote the proliferation of beneficial bacteria(Lactobacillus),and decreased harmful bacteria(Granulicatella,Proteus,Rummeliibacillus and Serratia).Furthermore,there was a significant distinction in the genus level flora processed by different polysaccharide fractions,especially *** fractions showed potential prebiotic effects,with mannogalactoglucan,in particular,promoting proliferation of SCFA-producing *** were regulated by monosaccharide composition,molecular weight of the FMPS fractions,and the composition of the fecal *** fractions could modulate metabolic function of the fecal microbiota,altering the levels of *** results suggested that FMPS are important functional components in gut health,especially mannogalactoglucan.

关键词： Polysaccharide fraction Fortunella margarita Fermentation Fecal microbiota Short chain fatty acid

Nonlinear Tripartite Entangled State Representation and Related Generalized Wigner Function

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Communications in Theoretical Physics 2005年第3X期44卷 541-546页

作者： WANG Pei-qing SONG tong-Qiang Physics Department Ningbo University Ningbo 315211 China

We construct the nonlinear tripartite entangled state representation and the related generalized Wigner operator. Then we discussed the Wigner functions of the nonlinear tripartite entangled state and the three-mode nonlinear squeezed vacuum state, and obtained the classical Weyl corresponding function of the three-mode nonlinear squeezed state.

关键词： nonlinear entangled states generalized Wigner operator IWOP technique

Squeezing Transformation of Three-Mode Entangled State

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Communications in Theoretical Physics 2005年第5X期44卷 911-916页

作者： QIAN Xiao-qing SONG tong-Qiang Department of Physics Ningbo University Ningbo 315211 China

We introduce the three-mode entangled state and set up an experiment to generate it. Then we discuss the three-mode squeezing operator squeezed ｜p, X2, X3〉→μ^-3/2｜p/μ, X2/μ, X3/μ） and the optical implement to realize such a squeezed state. We also reveal that c-number .asymmetric shrink transform in the three-mode entangled state, i.e. ｜p, X2,X3）→μ^-1/2｜p/μ, X2,X3）, maps onto a kind of one-sided three-mode squeezing operator {iλ （∑i^3=1 Pi）（∑i^3=1 Qi） -λ/2}. Using the technique of integration within an ordered product （IWOP） of operators, we derive their normally ordered forms and construct the corresponding squeezed states.

关键词： three-mode entangled state c-number asymmetric shrink transform one-sided three-mode squeezing operator

Generic Modeling and Control Framework for Power Systems Dominated by Power Converters Connected Through a Passive Transmission and Distribution Grid

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 292-301页

作者： qing-chang Zhong Marcio Stefanello Department of Electrical and Computer Engineering Illinois Institute of TechnologyChicagoIL 60616USA Syndem LLC USA.M.Stefanello is with the Fundacao Universidade Federal do Pampa at AlegreteRS97546-550Brazil

In this paper,a compact mathematical model having an elegant structure,together with a generic control framework,are proposed for generic power systems dominated by power converters that are interconnected through a passive transmission and distribution(T&D)grid,by adopting the port-Hamiltonian(pH)systems theory and the fundamental circuit *** models of generic T&D lines are developed and then the model of a generic T&D grid is *** the proposed control framework,the controlled converters are proven to be passive and Input-to-State Stable(ISS).The compact mathematical model is scalable and can be applied to power systems with multiple power electronic converters with generic passive controllers,passive local loads,and different types of passive T&D lines connected in a meshed configuration without self-loops,so it is very ***,the resulting power system is proven to be ISS as *** analysis is carried out without assumptions on constant frequency/voltage,constant loads,and/or lossless networks,except the need of passivity for all parts involved,and without using the Clarke/Park transformations or the graph *** simplify the presentation,three-phase balanced systems are adopted but the results can be easily adapted for single-phase or unbalanced three-phase systems.

关键词： Input-to-State Stable(ISS) passivity,portHamiltonian(pH)systems Power electronic converters dominated power systems Synchronized and Democratized(SYNDEM)grid architecture

Recrystallization temperature of tungsten with different deformation degrees

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Rare Metals 2016年第7期35卷 566-570页

作者： Xiao-Xin Zhang qing-Zhi Yan Chun-Tian Yang tong-Nian Wang Min Xia chang-Chun Ge Institute of Nuclear Materials University of Science & Technology Beijing

Pure tungsten （PW） and W-1 wt% La203 （WL10） were prepared by powder metallurgical route fol- lowed by the swaging ＋ rolling process. The logarithmic strains are 0, 0.37, 0.58, and 0.98 for WL10 and 0, 0.58 for PW. Heat treatments were performed at temperatures var- ied from 1,573 to 2,173 K to determine the recrystalliza- tion temperature. Recrystallization temperatures are 1,973 and 2,173 K for WL1 （logarithmic strain of 0.37） and WL3 （logarithmic strain of 0.98）, respectively. But in the case of WL2 （logarithmic strain of 0.58）, full recrystallization is not achieved at temperature of above 2,173 K. Further- more, the recrystallization temperature of PW with loga- rithmic strain of 0.58 is at least 300 K lower than that of the equivalent WLI0 sample. Moreover, the increase of recrystallization temperature inhibits the strength degra- dation of WL2： samples lose 4 % and 22 % strength when annealed at 1,573 and 1,973 K compared with room tem- perature （RT） sample. Finally, the texture evolution for the swaged ＋ rolled WL10 is significantly related to the deformation degree： the dominated orientation is （001） for WL2 while （110） for WL3.

关键词： Tungsten La203 Swaging+rolling Deformation Recrystallization

Overexpression of IbSnRK1 enhances nitrogen uptake and carbon assimilation in transgenic sweetpotato

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Journal of Integrative Agriculture 2018年第2期17卷 296-305页

作者： REN Zhi-tong ZHAO Hong-yuan HE Shao-zhen ZHAI Hong ZHAO Ning LIU qing-chang Key Laboratory of Sweetpotato Biology and Biotechnology Ministry of Agriculture/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis and Utilization Ministry of Education/China Agricultural University

Nitrogen is an important nutrient for plant development. Nitrogen and carbon metabolisms are tightly linked to physiological functions in plants. In this study, we found that the IbSnRK1 gene was induced by Ca（NO3）2. Its overexpression enhanced nitrogen uptake and carbon assimilation in transgenic sweetpotato. After Ca（^15NO3）2 treatment, the -（15）N atom excess, -（15）N and total N content and nitrogen uptake efficiency（NUE） were significantly increased in the roots, stems, and leaves of transgenic plants compared with wild type（WT） and empty vector control（VC）. After Ca（NO3）2 treatment, the increased nitrate N content, nitrate reductase（NR） activity, free amino acid content, and soluble protein content were found in the roots or leaves of transgenic plants. The photosynthesis and carbon assimilation were enhanced. These results suggest that the IbSnRK1 gene play a important role in nitrogen uptake and carbon assimilation of sweetpotato. This gene has the potential to be used for improving the yield and quality of sweetpotato.

关键词： carbon assimilation IbSnRK1 nitrogen uptake sweetpotato

Collision of Two General Geodesic Particles around a Kerr–Newman Black Hole

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Chinese Physics Letters 2013年第10期30卷 25-29页

作者： LIU chang-qing Department of Physics and Information Engineering Hunan Institute of Humanities Science and TechnologyLoudi 417000

Collision of two general geodesic particles around the Kerr–Newman black hole is studied and the center-of-mass(c.m.)energy of the non-marginally and marginally bound critical particles in the direct collision and the last stable orbit collision scenarios is *** constraint conditions that arbitrarily high *** can be obtained for the near-horizon collision of two general geodesic particles in the extremal Kerr–Newman black hole is found,and it is noted that the charge decreases the value of the latitude in which arbitrarily high *** can occur.

关键词： Newman collision arbitrarily

Uplink NOMA signal transmission with convolutional neural networks approach

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Journal of Systems Engineering and Electronics 2020年第5期31卷 890-898页

作者： LIN Chuan chang qing LI Xianxu School of Electronic and Information Engineering Beihang UniversityBeijing 100191China State Grid Information and Telecommunication Branch Beijing 100761China

Non-orthogonal multiple access(NOMA), featuring high spectrum efficiency, massive connectivity and low latency, holds immense potential to be a novel multi-access technique in fifth-generation(5G) communication. Successive interference cancellation(SIC) is proved to be an effective method to detect the NOMA signal by ordering the power of received signals and then decoding them. However, the error accumulation effect referred to as error propagation is an inevitable problem. In this paper,we propose a convolutional neural networks(CNNs) approach to restore the desired signal impaired by the multiple input multiple output(MIMO) channel. Especially in the uplink NOMA scenario,the proposed method can decode multiple users' information in a cluster instantaneously without any traditional communication signal processing steps. Simulation experiments are conducted in the Rayleigh channel and the results demonstrate that the error performance of the proposed learning system outperforms that of the classic SIC detection. Consequently, deep learning has disruptive potential to replace the conventional signal detection method.

关键词： non-orthogonal multiple access(NOMA) deep learning(DL) convolutional neural networks(CNNs) signal detection