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lie Symmetry and Conserved Quantities for Mechanical-Electrical Systems

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Communications in Theoretical Physics 2008年第6期49卷 1417-1420页

作者： jing hong-Xing li Yuan-Cheng College of Physics Science and Technology China University of Petroleum （East China） Dongying 257061 China

In this paper, we study lie symmetry and conserved quantities for a mechanical-electrical system. The criterion of the lie symmetry for this system is given. The generalized Hojman conserved quantity and generalized Lutzky conserved quantity deduced from the lie symmetry for the system are obtained. An example is presented to illustrate the results.

关键词： mechanical-electrical system lie symmetry generalized Hojman conserved quantity, generalized Lutzky conserved quantity

lie Symmetry and Generalized Mei Conserved Quantity for Nonconservative Dynamical System

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Communications in Theoretical Physics 2008年第5期49卷 1148-1150页

作者： jing hong-Xing li Yuan-Cheng College of Physical Science and Technology China University of Petroleum （East China） Dongying 257061 China

Based on the total time derivative along the trajectory of the system, for noneonservative dynamical system, the generalized Mei conserved quantity indirectly deduced from the lie symmetry of the system is studied. Firstly, the lie symmetry of the system is given. Then, the necessary and sumeient condition under which the lie symmetry is a Mei symmetry is presented and the generalized Mei conserved quantity indirectly deduced from the lie symmetry of the system is obtained. Lastly, an example is given to illustrate the application of the result.

关键词： lie symmetry Mei symmetry generalized Mei conserved quantity nonconservative dynamicalsystem

Observer-based Adaptive Iterative Learning Control for Nonlinear Systems with Time-varying Delays

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International Journal of Automation and computing 2010年第4期7卷 438-446页

作者： Wei-Sheng Chen Rui-hong li jing li Department of Applied Mathematics Xidian University X{an 710071 PRC

An observer-based adaptive iterative learning control （AILC） scheme is developed for a class of nonlinear systems with unknown time-varying parameters and unknown time-varying delays. The linear matrix inequality （LMI） method is employed to design the nonlinear observer. The designed controller contains a proportional-integral-derivative （PID） feedback term in time domain. The learning law of unknown constant parameter is differential-difference-type, and the learning law of unknown time-varying parameter is difference-type. It is assumed that the unknown delay-dependent uncertainty is nonlinearly parameterized. By constructing a Lyapunov-Krasovskii-like composite energy function （CEF）, we prove the boundedness of all closed-loop signals and the convergence of tracking error. A simulation example is provided to illustrate the effectiveness of the control algorithm proposed in this paper.

关键词： Adaptive iterative learning control (AILC) nonlinearly parameterized systems time-varying delays Lyapunov- Krasovskii-like composite energy function.

Ortholog Alleles at Xa3/Xa26 Locus Confer Conserved Race-Specific Resistance against Xanthomonas oryzae in Rice

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Molecular Plant 2012年第1期5卷 281-290页

作者： hong-jing li Xiang-Hua li jing-Hua Xiao Rod A.Wing Shi-Ping Wang National Key Laboratory of Crop Genetic Improvement National Center of Plant Gene Research(Wuhan)Huazhong Agricultural UniversityWuhan 430070China Arizona Genomics Institute School of Plant SciencesBIO5 InstituteUniversity of ArizonaTucsonAZ 85721USA

The rice disease resistance （R） gene Xa3/Xa26 （having also been named Xa3 and Xa26） against Xanthomonas oryzae pv. oryzae （Xoo）, which causes bacterial blight disease, belongs to a multiple gene family clustered in chromosome 11 and is from an AA genome rice cultivar （Oryza sativa L.）. This family encodes leucine-rich repeat （LRR） receptor kinase- type proteins, Here, we show that the orthologs （alleles） of Xa3/Xa26, Xa3/Xa26-2, and Xa3/Xa26-3, from wild Oryza spe- cies O. officinalis （CC genome） and O. minuta （BBCC genome）, respectively, were also R genes against Xoo. Xa3/Xa26-2 and Xa3/Xa26-3 conferred resistance to 16 of the 18 Xoo strains examined. Comparative sequence analysis of the Xa3/Xa26 families in the two wild Oryza species showed that Xa3/Xa26-3 appeared to have originated from the CC genome of O. minuta. The predicted proteins encoded by Xa3/Xa26, Xa3/Xa26-2, and Xa3/Xa26-3 share 91-99% sequence identity and 94-99% sequence similarity. Transgenic plants carrying a single copy of Xa3/Xa26, Xa3/Xa26-2, or Xa3PXa26-3, in the same genetic background, showed a similar resistance spectrum to a set of Xoo strains, although plants carrying Xa3/Xa26-2 or Xa3/Xa26-3 showed lower resistance levels than the plants carrying Xa3/Xa26. These results suggest that the Xa3/Xa26 locus predates the speciation of A and C genome, which is approximately 7.5 million years ago. Thus, the resistance spec- ificity of this locus has been conserved for a long time.

关键词： Bacterial blight broad-spectrum resistance durable resistance Oryza officinalis Oryza minuta Oryza sativa.

Tailoring Oxygen Vacancy on Co3O4 Nanosheets with High Surface Area for Oxygen Evolution Reaction

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Chinese Journal of Chemical Physics 2018年第4期31卷 517-522,615页

作者： Gong Zhang jing-hong li Department of Chemistry Key Laboratory of Bioorganic Phosphorus Chemistry ＆ Chemical BiologyTsinghua UniversityBelting 100084China Center for Water and Ecology Tsinghua UniversityBeijing 100084China

Electrochemical water splitting requires efficient water oxidation catalysts to accelerate the sluggish kinetics of water oxidation reaction. Here, we designed an efficient Co304 electrocatalyst using a pyrolysis strategy for oxygen evolution reaction （OER）. Morphological characterization confirmed the ultra-thin structure of nanosheet. Further, the existence of oxygen vacancies was obviously evidenced by the X-ray photoelectron spectroscopy and elec- tron spin resonance spectroscopy. The increased surface area of Co3O4 ensures more exposed sites, whereas generated oxygen vacancies on Co3O4 surface create more active defects. The two scenarios were beneficial for accelerating the OER across the interface between the anode and electrolyte. As expected, the optimized Co3O4 nanosheets can catalyze the OER eftciently with a low overpotential of 310 mV at current density of 10 mA/cm2 and remarkable long-term stability in 1.0 mol/L KOH.

关键词： Electrocatalyst OER Oxygen vacancy Co3O4

Magnetic Co_3O_4 nanowires,preparation and properties

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Chinese Chemical Letters 2012年第7期23卷 851-854页

作者： Mai Xia Ma Wei Meng Chen lin Guo jing hong li Chin Ping Chen Shi He Yang School of Chemistry and Environment Beijing University of Aeronautics and AstronauticsBeijing 100191China 'Department of Physics Peking UniversityBeijing 100871China Department of Chemistry Beijing Key Laboratory for Microanalytical Methods and InstrumentationKey Laboratory of Bioorganic Phosphorus Chemistry&Chemical BiologyTsinghua UniversityBeijing 100084China Department of Chemistry The Hong Kong University of Science and TechnologyHong KongChina Faculty of Chemistry and Material Science Langfang Teachers CollegeLangfang 065000China

The Co3O4 nanowires have been successfully synthesized via modified template *** as-prepared products have been characterized by EDS,TEM and HRTEM *** magnetic behavior of it is investigated by a magnetic property measurement *** nanowires exhibit some novel magnetic properties,which are different from its bulk *** temperature dependence curves of magnetization in zero-field-cooling and field-cooling exhibit two peaks of antiferromagnetic at blocking temperature of～23 K and～31 K,*** field dependent M（H） curves of the Co_3O_4 nanowires at T = 5 and 300 K both exhibit PM ***,the diameter of nanowires is hence determined according to the finite size effect as approximately 7-11 nm,in consistent with the characterizations by HRTEM.

关键词： Nanostructures Oxides Magnetic properties

Root structure of slope protection plants in a high-grade highway

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Journal of Forestry Research 2011年第2期22卷 311-313页

作者： WANG jing-hong li Xing-tao liU Xiao-dong Wang Fei liU Yu College of Landscape Architecture Northeast Forestry University Harbin150040 Heilongjiang China.

Root length and root length density of Lespedeza bicolor,Amorpha fruticosa,and Sea buckthorn were investigated in a country highway-TongSan highway（Tongjiang to Sanya） in Heilongjiang Province,*** root lengths were divided into five root orders according to Pregizter sequence classification *** show that sea buckthorn roots are dominated by coarse roots in the horizontal growth,while *** has a large proportion of fine roots in vertical conical growth and *** is in depth *** length density of *** in all the root sequences is higher than that of sea buckthorn and *** the basis of the root structure,it is inferred that *** roots mainly absorb the surface soil moisture for its normal growth;in contrast,*** has good uptake ability to deep soil *** root structure of sea buckthorn implies that it has a strong drought resistance.

关键词： seasonal frost area slope protection plant root structure

Determination of Dopamine in the Presence of Ascorbic Acid on the IrO2-Ta2O5 Type DSA Electrode

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Chinese Chemical Letters 2005年第1期16卷 64-66页

作者： Yang liU, Zhi Ying li, jing hong li? State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

IrO2/Ta2O5 (70%: 30%, molar ratio) electrodes (ITEs) were prepared by the thermal decomposition method. Typical “mud-cracked” surface and surface enrichment of Ta were observed. The determination of dopamine (DA) was carried out in the presence of ascorbic acid (AA). The detection limit of DA was 5×10-5 mol/L without the interference of AA.

关键词： Dopamine ascorbic acid determination DSA.

Joint Detection of Serum Vitamin D,Body Mass Index,and Tumor Necrosis Factor Alpha for the Diagnosis of Crohn’s Disease

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Current Medical Science 2023年第3期43卷 496-504页

作者： Ying ZHENG jing-hong li Shan-ying liAO Yi-ming FU Yan-jun ZHANG Jun-long liN Xin-bin CHEN Wei-hong SHA Shi-xue DAI Wen-jun MA Department of Nutrition Guangdong Provincial People's HospitalGuangdong Academy of Medical SciencesSouthern Medical UniversityGuangzhou510080China The Second School of Clinical Medicine Southern Medical UniversityGuangzhou 510080China Department of Gastroenterology Guangdong Provincial People's HospitalGuangdong Academy of Medical SciencesSouthern Medical UniversityGuangzhou 510080China The First School of Clinical Medicine&Nanfang Hospital Southern Medical UniversityGuangzhou 510080China Department of Gastroenterology Guangdong Provincial Geriatrics InstituteNational Key Clinical SpecialtyGuangdong Provincial People's HospitalGuangdong Academy of Medical SciencesSouthern Medical UniversityGuangzhou 510080China

Objective Vitamin D(VD)deficiency was reported to contribute to the progression of Crohn’s disease(CD)and affect the prognosis of CD *** study investigated the role of serum VD,body mass index(BMI),and tumor necrosis factor alpha(TNF-α)in the diagnosis of Crohn’s *** CD patients(n=76)and healthy subjects(n=76)were enrolled between May 2019 and December *** serum 25-hydroxyvitamin D[25(OH)D]levels,BMI,and TNF-αlevels,together with other biochemical parameters,were assessed before *** diagnostic efficacy of the single and joint detection of serum 25(OH)D,BMI,and TNF-αwas determined using receiver operating characteristic(ROC)*** The levels of 25(OH)D,BMI,and nutritional indicators,including hemoglobin,total protein,albumin,and high-density lipoprotein cholesterol,were much lower,and the TNF-αlevels were much higher in the CD patients than in the healthy subjects(Plinical practice.

关键词： Crohn’s disease vitamin D body mass index tumor necrosis factor alpha