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design considerations for electromagnetic couplers in contactless power transmission systems for deep-sea applications

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第10期11卷 824-834页

作者： Ze-song li de-jun li lin liN Ying CHEN State Key Lab of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027. China

In underwater applications of contactless power transmission(CLPT) systems,high pressure and noncoaxial operations will change the parameters of electromagnetic(EM) *** a result,the system will divert from its optimum *** a reluctance modeling method,we investigated the gap effects on the EM coupler in deep-sea *** and measurements were performed to analyze the influence of high pressure and noncoaxial alignments on the *** was shown that it is useful to set a relatively large gap between cores to reduce the influence of *** were carried out to verify the transferring capacity of the designed coupler and system for a fixed *** results showed that an EM coupler with a large gap can serve a stable and efficient power transmission for the CLPT *** designed system can transfer more than 400 W electrical power with a 2-mm gap in the EM coupler,and the efficiency was up to 90% coaxially and 87% non-coaxially in 40 MPa salt ***,a mechanical layout of a 400 W EM coupler for the underwater application in 4000-m deep sea was proposed.

关键词： Contactless power transmission(CLPT) EM coupler deep sea Gap effects

Multilayered gradient CrN/ZrN coatings synthesized by magnetron sputtering

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中国有色金属学会会刊：英文版 2004年第z1期14卷 243-246页

作者： liU Feng WANG Ming-xia liU Qian-xiang li de-jun College of Physics and Electronic Information Science Tianjin Normal University Tianjin 300074 China Institute of Plasma Physics Chinese Academy of Science Hefei 230031 China College of Physics and Electronic Information ScienceTianjin Normal University Tianjin 300074 China College of Physics and Electronic Information ScienceTianjin Normal University Tianjin 300074 China College of Physics and Electronic Information ScienceTianjin Normal University Tianjin 300074 China

The multilayer gradient CrN/ZrN coatings were synthesized by a dual cathode DC magnetron *** influence of different species of reaction gases and partial pressures on structure and mechanical properties was investigated using XRD, AES, XPS, and nanoindentation. The results show that N2-NH3 mixture process gas is of benefit to the synthesis of superhard multilayered gradient CrN/ZrN coatings. The presence of the preferred orientations of CrN(111), (200) and ZrN (111), (220) in the structure is a main reason for superhardness of multilayered gradient coatings.

关键词： magnetron sputtering multilayered gradient coating CrN/ZrN nanoindentation

Quantum Solitons and Localized Modes in a One-Dimensional Lattice Chain with Nonlinear Substrate Potential

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Communications in Theoretical Physics 2006年第5期45卷 869-872页

作者： li de-jun MI Xian-Wu deNG Ke TANG Yi department of Physics Jishou University Jishou 416000 China department of Physics Xiangtan University Xiangtan 411105 China

In the classical lattice theory, solitons and localized modes can exist in many one-dimensional nonlinear lattice chains, however, in the quantum lattice theory, whether quantum solitons and localized modes can exist or not in the one-dimensional lattice chains is an interesting problem. By using the number state method and the Hartree approximation combined with the method of multiple scales, we investigate quantum solirons and localized modes in a one-dimensional lattice chain with the nonlinear substrate potential. It is shown that quantum solitons do exist in this nonlinear lattice chain, and at the boundary of the phonon Brillouin zone, quantum solitons become quantum localized modes, phonons are pinned to the lattice of the vicinity at the central position j = j0.

关键词： number state method Hartree approximation quantum envelope soliton quantum localized mode

Coherent Interband and Intersubband Dynamics in Terahertz-Driven GaAs Quantum Wells

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Communications in Theoretical Physics 2005年第5X期44卷 941-947页

作者： MI Xian-Wu PENG Jin-Zhang li de-jun ZHAO He-Ping College of Physical Science and Information Engineering Jishou University Jishou 416000 China State Key Laboratory of Functional Materials for Informatics~ Shanghai Institute of Microsystem and Information Tech- nology~ the Chinese Academy of Sciences Shanghai 200050 China

We theoretically investigate the optical absorption spectra and charge density by subjecting a GaAs quantum well to both an intense terahertz (THz)-frequency driving field and an optical pulse within the theory of density matrix. In presence of a strong THz field, the optical transitions in quantum well subbands are altered by the THz field. The alteration has a direct impact on the optical absorption and the charge density. The excitonic peak splitting and THz optical sideband in the absorption spectra show up when changing the THz field intensity and/or frequency. The Autler-Towns splitting is a result from the THz nonlinear dynamics of confined excitons. On the other hand, the carrier charge density is created as wave packets formed by coherent superposition of several eigenstates. The charge density exhibitsquantum beats for short pulses and/or wider wells and is modulated by the THz field.

关键词： terahertz quantum well optical absorption

Quantum Solitary Wave Solutions in a Ferromagnetic Chain with Nearest-and Next-Nearest-Neighbor Interaction

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Communications in Theoretical Physics 2008年第11期50卷 1177-1180页

作者： li de-jun WANG Xiao-Yun MI Xian-Wu KUE Jing department of Physics Jishou University Jishou 416000 China department of Physics Xiangtan University Xiangtan 411105 China

The quantum solitary wave solutions in a one-dimensional ferromagnetic chain is investigated by using theHartree-Fock approach and the multiple-scale *** is shown that quantum solitary wave solutions can exist in aferromagnetic system with nearest-and next-nearest-neighbor exchange interaction,and at the certain value of the firstBrillouin zone,the solitary wave solution of the Hartree wave function becomes the intrinsic localized mode.

关键词： Hartree-Fock approach multiple-scale method quantum solitary wave solution

Synthesis,Characterization and Standard Molar Formation Enthalpy of [Sm(C_7H_5O_3)_2(C_4H_6NO_2S)]·2H_2O

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Chemical Research in Chinese Universities 2009年第4期25卷 564-568页

作者： li Xu YANG de-jun li Qiang-guo li Ai-tao YE li-juan JIANG Jian-hong department of Chemistry and life Science Xiangnan University Chenzhou 423000 P. R. China

[Sm（C7H5O3）2（C4H6NO2S）]·2H2O was synthesized from the reaction of samarium chloride hexahydrate with salicylic acid and thioproline,and characterized by IR,elemental analysis and thermogravimatric *** standard molar enthalpies of the solutions of SmCl3·6H2O（s）,2[C7H6O3（s）],[C4H7NO2S（s）] and [Sm（C7H5O3）2·（C4H6NO2S）·2H2O（s）] in a mixed solvent of absolute ethyl alcohol,dimethyl formamide（DMF） and 3 mol/L HCl were,respectively,determined by calorimetry to be ΔsHm^Θ [SmCl3·6H2O（s）,298.15 K]=（-46.68±0.15） kJ/mol,ΔsHm^Θ [2C7H6O3（s）,298.15 K]=（25.19±0.02） kJ/mol,ΔsHm^Θ [C4H7NO2S（s）,298.15 K]=（16.20±0.17） kJ/mol and ΔsHm^Θ {[Sm（C7H5O3）2（C4H6NO2S）]·2H2O（s）,298.15 K}=（-81.24±0.67） kJ/*** enthalpy change of the reaction SmCl3·6H2O（s）＋2C7H6O3（s）＋C4H7NO2S（s）=[Sm（C7H5O3）2（C4H6NO2S）]·2H2O（s）＋3HCl（g）＋4H2O（l） was determined to be ΔrHm^Θ =（123.45±0.71） kJ/*** the data in the literature,the standard molar formation enthalpy of [Sm（C7H5O3）2（C4H6NO2S）]·2H2O（s） was estimated to be Δf Hm^Θ {[Sm（C7H5O3）2（C4H6NO2S）]·2H2O（s）,298.15 K}=（-2912.03±3.1） kJ/mol through Hess＇ law.

关键词： Samarium chloride hexahydrate Salicylic acid Thioproline Standard molar formation enthalpy

Oxygen Ion Beam and Plasma Induced Blood Compatibility of Polyetherurethane

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Chinese Physics Letters 1997年第7期14卷 531-534页

作者： li de-jun CUI Fu-zhai FENG Qing-ling ZHAO Jie department of Materials Science and Engineering Tsinghua UniversityBeijing 100084 department of Physics Tianjin Normal UniversityTianjin 300074

Surface blood compatibility of ion beam and plasma treatment on polyetherurethane has been studied.O^(+)implantation was performed at 80keV with various doses.O_(2) plasma treatment was carried out at 100 W with various exposure *** results indicated that surface anticogulability was enhanced in varying degrees and anticalcific behavior was not decreased.X-ray photoelectron spectroscopy and electron spin resonance analysis showed that the two methods not only broke some chemical bonds,but also produced some new N-O and C-O bonds and radicals in the surface,which affected the surface biomedical behavior.

关键词： Blood implantation Oxygen

design, Synthesis and Antitumor Activity in vitro of a Series of 3-Arylcoumarins

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Chemical Research in Chinese Universities 2013年第6期29卷 1125-1128页

作者： liU Zhi-hui li de-jun JIANG Dan XIAO Chuan SONG Zhi-guang JIN Ying-hua department of Prosthodontics School of StomatologyJilin University Changchun 130021 P.R.China department of Organic Chemistry College of Chemistry Jilin University Changchun 130021 P.R.China Key Laboratory for Molecular Enzymology and Engineering Ministry of EducationJilin University Changchun 130012 P.R.China

A new series of 7-substituted 3-arylcoumarins was designed, synthesized and evaluated as novel antitumor agents in vitro. It was found that several compounds of them exhibit activity in vitro against SK-HEP-l（hepatocellular carcinoma）, HepG2（hepatocellular carcinoma） and SGC7901（gastric carcinoma） cell lines to some extent. Moreover, compounds 5a, 5b, 6a and 6b have better activity against HeLa（cervical carcinoma） cell and their half maximal inhibitory concentration（IC50） values are less than 10μmol/L.

关键词： 3-Arylcoumarin Antitumor activity Structure modification

Effect of Simulated N deposition on Soil Exchangeable Cations in Three Forest Types of Subtropical China

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Pedosphere 2009年第2期19卷 189-198页

作者： LU Xian-Kai MO Jiang-Ming P.GUNdeRSERN ZHU Wei-Xing ZHOU Guo-Yi li de-jun ZHANGXu Dinghushan Forest Ecosystem Research Station South China Botanical Garden Chinese Academy of Sciences Zhaoqing 526070 China Danish Centre for Forest Landscape and Planning University of Copenhagen Hoersholm Kongevej 11 DK-2970 Hoersholm Denmark department of Biological Sciences State University of New York Binghamton NY 13902-6000 （USA） Nanjing Agricultural University Nanjing 210095 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

The effects of simulated nitrogen(N)deposition on soil exchangeable cations were studied in three forest types of subtropical *** N treatments with three replications were designed for the monsoon evergreen broadleaf forest (mature forest):control(0 kg N ha-1 year-1),low N(50 kg N ha-1 year-1),medium N(100 kg N ha-1 year-1)and high N(150 kg N ha-1 year-1),and only three treatments(i.e.,control,low N,medium N)were established for the pine and mixed *** had been applied continuously for 26 months before the *** mature forest responded more rapidly and intensively to N additions than the pine and mixed forests,and exhibited some significant negative symptoms,e.g.,soil acidification,Al mobilization and leaching of base cations from *** pine and mixed forests responded slowly to N additions and exhibited no significant response of soil *** of soil exchangeable cations to N deposition varied in the forests of subtropical China,depending on soil N status and land-use history.

关键词： exchangeable cation forest soil land-use history N deposition subtropics