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Gene Discovery and Functional Analyses in the Model Plant Arabidopsis

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Journal of Integrative Plant Biology 2006年第1期48卷 5-14页

作者： cai-ping Feng John Mundy Institute of Loess Plateau Shanxi University Taiyuan 030006 China Institute of Molecular Biology Copenhagen University （~ster Farimagsgade 2A DK-1353 Copenhagen K Denmark

The present mini-review describes newer methods and strategies, including transposon and T-DNA insertions, TILLING, Deleteagene, and RNA interference, to functionally analyze genes of interest in the model plant Arabi... 详细信息

关键词： Arabidopsis functional genomics mutagenesis reverse genetics.

Noether＇s Theorem of Nonholonomic Systems in Optimal Control

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Acta Mathematicae Applicatae Sinica 2016年第4期32卷 875-882页

作者： ping-ping cai Duan SONG Jing-li FU Institute of Mathematical Physics Zhejiang Sci-Tech University Hangzhou 310018 China Eastern Liaodong University Shenyang 118000 China

In this paper, we extend Noether＇s theorem to nonholonomic constraints systems in optimal control. We present a systematic way to calculate conserved quantities along the Pontryagin extremals for optimal control problems with nonholonomic constraints, which are invariant under the parameter groups of infinitesimal transformations that change all （time, state, control） variables. Meanwhile, the Noether equalities corresponding to the conservation laws are given. Then, we obtain a new version of Noether＇s theorem to optimal control systems. An example is given to illustrate the application of these results.

关键词： nonholonommic system symmetry conservation law Noether's theorem optimal control

Modal parameter identification of flexible spacecraft using the covariance-driven stochastic subspace identification(SSI-COV) method

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Acta Mechanica Sinica 2016年第4期32卷 710-719页

作者： Yong Xie Pan Liu Guo-ping cai Department of Engineering Mechanics State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University

In this paper, the on-orbit identification of modal parameters for a spacecraft is investigated. Firstly, the coupled dynamic equation of the system is established with the Lagrange method and the stochastic state-space model of the system is obtained. Then, the covariance-driven stochastic subspace identification（SSI-COV） algorithm is adopted to identify the modal parameters of the system. In this algorithm, it just needs the covariance of output data of the system under ambient excitation to construct a Toeplitz matrix, thus the system matrices are obtained by the singular value decomposition on the Toeplitz matrix and the modal parameters of the system can be found from the system matrices. Finally,numerical simulations are carried out to demonstrate the validity of the SSI-COV algorithm. Simulation results indicate that the SSI-COV algorithm is effective in identifying the modal parameters of the spacecraft only using the output data of the system under ambient excitation.

关键词： covariance stochastic subspace spacecraft modal validity matrices identifying excitation Toeplitz

LLMP： Exploiting LLDP for Latency Measurement in Software-Defined Data Center Networks

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Journal of Computer Science & Technology 2018年第2期33卷 277-285页

作者： Yang Li Zhi-ping cai Hong Xu College of Computer National University of Defense Technology Changsha 410073 China Department of Computer Science City University of Hong Kong Hong Kong 9990V7 China

The administrators of data center networks have to continually monitor path latency to detect network anomaly quickly and ensure the efficient operation of the networks. In this work, we propose Link Layer Measurement Protocol （LLMP）, a prototype latency measuring framework based on the Link Layer Discovery Protocol （LLDP）. LLDP is utilized by the controller to discover network topology dynamically. We insert timestamps into the optional LLDPTLV field in LLDP, so that the controller can estimate latency on any single link. The framework utilizes a reactive measurement approach without injecting any probe packets to the network. Our experiments show that the latency of a link can be measured accurately by LLMP. In relatively complex network conditions, LLMP can still maintain a high accuracy. We store the LLMP measurement results into a latency matrix, which can be used to infer the path latency.

关键词： software-defined network (SDN) Link Layer Discovery Protocol (LLDP) latency measurement

Decoding the electron dynamics in high-order harmonic generation from asymmetric molecular ions in elliptically polarized laser fields

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Chinese Physics B 2022年第4期31卷 287-292页

作者： cai-ping Zhang Xiang-Yang Miao College of Physics and Information Engineering Shanxi Normal UniversityTaiyuan 030031China Key Laboratory of Spectral Measurement and Analysis of Shanxi Province Shanxi Normal UniversityTaiyuan 030031China

The high-order harmonic generation from an asymmetric molecular ion is theoretically investigated based on the Born-Oppenheimer model with two-dimensional electron *** is shown that the harmonic intensity changes periodically in elliptically polarized laser *** periodical character is *** establishing the physical image,the periodicity of the harmonic intensity can be ascribed to the contributions of the ground state and the excited ***,the electron dynamics from different electronic states can be selected via combining the elliptically polarized laser field with a static electric *** harmonics dominated either by ground state or excited state are emitted once in an optical cycle in the combined laser field.

关键词： asymmetric molecular ion high-order harmonic generation electron dynamics elliptically polarized laser field

Ground State and Single Vortex for Bose-Einstein Condensates in Anisotropic Traps

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Communications in Theoretical Physics 2007年第6期47卷 1053-1057页

作者： XU Zhi-Jun cai ping-Gen Department of Applied Physics Zhejiang University of Technology Hangzhou 310032 China The State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan 430071 China

For Bose-Einstein condensation of neutral atoms in anisotropic traps at zero temperature, we present simple analytical methods for computing the properties of ground state and single vortex of Bose-Einstein condensates, and compare those results to extensive numerical simulations. The critical angular velocity for production of vortices is calculated for both positive and negative scattering lengths a, and find an analytical expression for the large-N limit of the vortex critical angular velocity for a 〉0, and the critical number for condensate population approaches the point of collapse for a 〈 0, by using approximate variational method.

关键词： Bose-Einstein condensation G-P equation wave function vortex formation

Inhibition of latrunculin-A on dexamethasone-induced fibronectin production in cultured human trabecular meshwork cells

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International Journal of Ophthalmology(English edition) 2011年第3期4卷 239-242页

作者： Yun Wang, Su-ping cai Ophthalmic Laboratories & Department of Ophthalmology State Key Laboratory of Biotherapy West China Hospital Sichuan University Chengdu 610041 Sichuan Province China Department of Second Affiliated hospital of Nanhua University 421001 Hunan Province China State Key Laboratory of Ophthalmology Zhongshan Ophthalmic Center Sun Yat-sen University Guangzhou Province 510060 China

AIM: To determine the effects of a low dose latrunculin (LAT)-A on dexamethasone (Dex)-induced upregulation of extracellular matrix proteins fibronectin (FN) in cultured human trabecular meshwork (HTM) cells. METHODS: HTM cells were cultured to confluent and incubated with 0.4 mu mol/L Dex and/or 0.05 mu mol/L LAT-A. FN expression in HTM cells was evaluated by Western blot and immunofluorescence microscopy. RESULTS: Dex up-regulated FN production in HTM cells, failed to do so when co-incubated with LAT-A. LAT-A decreased production of FN in cultured HTM cells. CONCLUSION: This study indicated that LAT-A may modulate the expression of fibronectin in trabecular meshwork to achieve treatment for steroids and other types of glaucoma. It has an important prospect as an intraocular pressure-lowering drug.

关键词： latrunculin-A dexamethasone human trabecular meshwork cells fibronectin

Role of the Permanent Dipole Moment in Coulomb Explosion

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Chinese Physics Letters 2013年第10期30卷 68-72页

作者： ZHANG cai-ping MIAO Xiang-Yang College of Physics and Information Engineering Shanxi Normal UniversityLinfen 041004

By numerically solving the non-Born–Oppenheimer time-dependent Schr?dinger equation in a few-cycle chirped laser field(5-fs,800-nm),the effect of the permanent dipole moment on the Coulomb explosion is studied by the kinetic-energy-release spectra with the"virtual detector"*** results indicate that with the effect of the permanent dipole moment,different multiphoton processes for heteronuclear and homonuclear diatomic molecular ions may take place when the wave packets transit from the ground state(1sσg)to the first excited state(2pσu),and then move along the excited potential curve,and finally charge-resonant enhanced ionization occurs at critical internuclear *** a result,despite the similar ionization probabilities for these two systems at higher vibrational level with larger chirp parameterβ,the structure of the Coulomb explosion spectrum for the former is prominently different from that for the latter.

关键词： method excited dipole

Arg124Cys mutation of the TGFBI gene in a Chinese pedigree of Reis-Bücklers corneal dystrophy

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International Journal of Ophthalmology(English edition) 2011年第3期4卷 235-238页

作者： Qiao-Na Yang, Su-ping cai Ophthalmic Laboratories & Department of Ophthalmology West China Hospital Sichuan University Chengdu 610041 Sichuan Province China Department of Ophthalmology the Affiliated Hospital of Vocational Technology Institute of Yongzhou Hunan Province China

AIM: To analyze mutations in transforming growth factor beta-induced (TGFBI) gene in a Chinese pedigree with Reis-Bücklers corneal dystrophy (RBCD,also known as GCD3).METHODS: In a five-generation Chinese family,eight members were identified with RBCD and the rest were *** members of the family underwent complete ophthalmologic *** of TGFBI were amplified by polymerase chain reaction,sequenced,and compared with a reference ***: A single heterozygous C>T (R124C) point mutation was found in exon 4 of TGFBI in all the affected members of the pedigree,but not in the unaffected ***: R124C which was a known mutation for lattice corneal dystrophy type I,segregated with the RBCD in this *** elucidated the correlation between genotype and phenotype in a Chinese family of RBCD.

关键词： Reis-Bücklers corneal dystrophy molecular genetics mutation TGFBI R124C