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Four-soliton solution and soliton interactions of the generalized coupled nonlinear Schrodinger equation

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Chinese Physics B 2020年第6期29卷 216-223页

作者： li-jun song Xiao-Ya Xu Yan Wang Department of Physics and Electronic Engineering Shanxi UniversityTaiyuan 030006China

Based on the generalized coupled nonlinear Schr¨odinger equation,we obtain the analytic four-bright–bright soliton solution by using the Hirota bilinear *** interactions among four solitons are also studied in *** results show that the interaction among four solitons mainly depends on the values of solution parameters;k1 and k2 mainly affect the two inboard solitons while k3 and k4 mainly affect the two outboard solitons;the pulse velocity and width mainly depend on the imaginary part of ki(i=1,2,3,4),while the pulse amplitude mainly depends on the real part of ki(i=1,2,3,4).

关键词： coupled nonlinear Schrodinger equation four-soliton solution soliton interaction

Optimization of a magneto–optic trap using nanofibers

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Chinese Physics B 2019年第7期28卷 198-201页

作者： Xin Wang li-jun song Chen-Xi Wang Peng-Fei Zhang Gang li Tian-Cai Zhang State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-Electronics Shanxi University Taiyuan 030006 China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan 030006 China

We experimentally demonstrate a reliable method based on a nanofiber to optimize the number of cold atoms in a magneto–optical trap(MOT) and to monitor the MOT in real *** atomic fluorescence is collected by a nanofiber with subwavelength diameter of about 400 *** MOT parameters are experimentally adjusted in order to match the maximum number of cold atoms provided by the fluorescence collected by the *** maximum number of cold atoms is obtained when the intensities of the cooling and re-pumping beams are about 23.5 mW/cm^2 and 7.1 mW/cm^2,respectively;the detuning of the cooling beam is-13.0 MHz, and the axial magnetic gradient is about 9.7 Gauss/*** observe a maximum photon counting rate of nearly(4.5 ± 0.1)× 10^5 counts/*** nanofiber–atom system can provide a powerful and flexible tool for sensitive atom detection and for monitoring atom–matter *** can be widely used from quantum optics to quantum precision measurement.

关键词： nanofiber magneto–optic trap optimization fluorescence efficient coupling

Tunable Optical Bandpass Filter via a Microtip-Touched Tapered Optical Fiber

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Chinese Physics Letters 2020年第10期37卷 26-32页

作者： Peng-Fei Zhang li-jun song Chang-ling Zou Xin Wang Chen-Xi Wang Gang li Tian-Cai Zhang State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China

We demonstrate a tunable bandpass optical filter based on a tapered optical fiber(TOF)touched by a hemispherical microfiber tip(MFT).Other than the interference and selective material absorption effects,the filter relies on the controllable and wavelength-dependent mode–mode interactions in ***,a large range of tunability is realized by controlling the position of the MFT in contact with the TOF for various TOF radii,and two distinct bandpass filter mechanisms are *** center wavelength of the bandpass filter can be tuned from 890 nm to 1000 nm,while the FWHM bandwidth can be tuned from 110 nm to 240 nm when the MFT touches the TOF in the radius range from 160 nm to 390 *** distinction ratio can reach 28±3 dB *** combined TOF-MFT is an in-line tunable bandpass optical filter that has great application potential in optical networks and spectroscopy,and the principle could also be generalized to other integrated photonic devices.

关键词： tunable fiber Touch

Pharmacokinetics and biodistribution of polymeric micelles of paclitaxel with Pluronic P123

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Acta Pharmacologica Sinica 2006年第6期27卷 747-753页

作者： li-mei HAN Jie GUO li-jun ZHANG Qing-song WANG Xiao-ling FANG~2 Department of Pharmaceutics.School of Pharmacy,Fudan University,Shanghai 200032,China Department of Pharmaceutics School of Pharmacy Fudan University Shanghai China

Aim:To investigate the preparation,in vitro release,in vivo pharmacokineticsand tissue distribution of a novel polymeric micellar formulation of paclitaxel(PTX)with Pluronic ***:The polymeric micelles of paclitaxel with PluronicP123 were prepared by a solid dispersion *** characteristics of micellesincluding particle size distribution,morphology and in vitro release of PTX frommicelles were carried ***-loaded micellar solutions were administered throughthe tail vein to healthy Sprague-Dawley rats and Kunming strain mice to assessthe pharmacokinetics and tissue distribution of PTX,***,thecommercially available intravenous formulation of PTX,was also administered ***:By using a dynamic light scattering sizer and a transmissionelectron microscopy,it was shown that the PTX-loaded micelles had a mean sizeof approximately 25 nm with narrow size distribution and a spherical *** continuously released from Pluronic P 123 micelles in release medium contain-ing 1 mol/L sodium salicylate for 24 h at 37℃.In the pharmacokinetic assessment,t1/2βand AUC of micelle formulation were 2.3 and 2.9-fold higher than that of *** the PTX-loaded micelles increased the uptake of PTX in the plasma,ovary and uterus,lung,and kidney,but decreased uptake in the liver and brain inthe biodistribution ***:Polymeric micelles using Pluronic P123can effectively solubilize PTX,prolong blood circulation time and modify thebiodistribution of PTX.

关键词： paclitaxel micelle Pluronic P123 pharmacokinetics biodistribution

Inhibitory Effects of Aromatic Compounds on Soil Nitrification

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Pedosphere 2010年第3期20卷 326-333页

作者： ZHANG li-li WU Zhi-Jie SHI Yun-Feng CHEN li-jun song Yu-Chao JUAN Ying-Hua Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 （China） Graduate University of the Chinese Academy of Sciences Beijing 100049 （China） College of Resource and Environment Shenyang Agricultural University Shenyang 110039 （China）

Aromatic compounds (ACs) in soil can induce competitive inhibition for soil NH3 oxidation, and nitrification inhibitors can be used to this end. A laboratory incubation experiment was performed with 12 nitroaromatic compounds (NACs), 15 amidoaromatic compounds (AACs) and 20 hydroxyaromatic compounds (HACs) to assess the inhibitory effects of ACs on soil nitrification. Based on these results, the critical and optimal concentrations of ACs were determined for better inhibitory effects. Most of the test ACs were able to inhibit soil nitrification; the effectiveness differed with soil type. Among the ACs, the NACs with m-nitryl, amino or hydroxyl and the AACs with a nitro group or a chlorine atom on aromatic ring or with a p-hydroxyl were more effective. 3-nitroaniline, 4-aminophenol and 3-nitrophenol showed the greatest potential as nitrification inhibitors. The critical concentration of these compounds in brown soil and cinnamon soil was found to be 0.5 mg kg-1 soil. Due to the toxicity, carcinogenicity and mutagenicity of ACs, further toxicological and ecotoxicological research is necessary before ACs are used as nitrification inhibitors in agricultural and horticultural practices.

关键词： amidoaromatic compounds ammonia oxidation hydroxyaxomatic compounds nitrification inhibition nitroaromatic compounds

Decoquinate derivatives:A new class of potent antischistosomal agents against Schistosoma japonicum

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Chinese Chemical Letters 2017年第7期28卷 1547-1552页

作者： Wen-Long Wang li-jun song Bo-Chun Hu li Miao Xiao-Yu Chen Wen-Hua Fan Xu-Ren Yin Shuang Shen Zhao-Feng Ding Chuan-Xin Yu School of Pharmaceutical Science Jiangnan UniversityWuxi 214122China Key Laboratory of National Health and Family Planning Commission on Parasitic Disease Control and Prevention Jiangsu Provincial Key Laboratory on Parasite and Vector Control TechnologyJiangsu Institute of Parasitic DiseasesWuxi 214064China Medical School Jiangnan UniversityWuxi 214122China Suzhou Kemu Veterinary Pharmaceutical Co. Ltd.Meiyan High-technology Development ZoneSuzhou 215225China

Decoquinate（1）, an old and inexpensive coccidiostat, exhibited potent antimalarial activity, however, its antischistosomal activity against Schistosoma japonicum has not yet been evaluated. Based on decoquinate, a series of decoquinate derivatives was designed, synthesized, evaluated as a new class of antischistosomal agents against S. japonicum adult worms in vitro. Among them, compound 15 killed 100% of adult S. japonicum in 72 h at the concentration of 10 mmol/L in vitro, exhibited stronger wormkilling activity than PZQ in vitro and could serve as a promising lead compound to develop new antischistosomal agents.

关键词： Decoquinate Derivatives Worm-killing activity Schistosoma japonicum Structure–activity relationships(SARs)

Thickness and sp3 bond modulation of（Ti/tetrahedral amorphous carbon）_n multilayer coatings

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Tungsten 2025年第1期7卷 152-160页

作者： Zhi-jun Xie Jia-lin li ling Gong Xiang-li Zhong Hong-Jia song Jin-Bin Wang National-Provincial Laboratory of Special Function Thin Film Materials School of Materials Science and Engineering Xiangtan University

The durability of wear-resistant tetrahedral amorphous carbon（ta-C） coatings is intimately linked to their thickness and the concentration of *** enhance the lifespan of the coatings,we have prepared a multilayer coating consisting of alternating layers of Ti and ta-C,denoted as（Ti/ta-C）_n,using arc ion plating.A multi-layer structure in conjunction with stage cooling is employed to enhance the thickness and promote *** results indicate that the ID/IGvalue,representing the ratio of the intensity of the D peak to that of the G peak in Raman spectroscopy,decreases from 0.85 when no stage cooling is applied to 0.35 when stage cooling is employed,suggesting an enhancement in the fraction of sp3bonds within the *** obtained（Ti/ta-C）_n multilayer coating without peeling off has a maximum thickness of 1.14 μm,which is almost double that of the ta-C coating single layer *** the same time,the coating has a low coefficient of friction,down to 0.069,and maintains excellent friction properties with a wear rate of 3.4×10-6mm3·N-1·*** results conclusively show that the preparation technology can enhance both thickness and sp3bonding in ta-C coatings,significantly expanding their utility across tools,molds,and precision engineering components.

关键词： Arc ion plating Multilayer structure sp3 bond Ta-C coating Wear resistance

SUSTAINABLE AGRICULTURE DEVELOPMENT IN SAliNE-ALKAli SOIL AREA OF songNEN PLAIN,NORTHEAST CHINA

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Chinese Geographical Science 2003年第2期13卷 171-174页

作者： WANG Zhi-chun, li Qu-sheng, li Xiu-jun, song Chang-chun, ZHANG Guang-xin (Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, P. R. China) Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences Changchun P. R. China

There is great potential for agriculture in saline-alkali soil area in songnen Plain, Northeast China. But the sustainable crop production in this area has been restricted by a few of main factors, such as less precipitation, h igher evaporation and frequent drought, high salinity and alkalinity, high excha ngeable sodium content and poor infiltration of the soil, and insufficiency and low availability in nutrition. It is also considered that there are a few of fav orable conditions for agricultural development in this region, such as sufficien t light and heat resources, rich ground water resources, plenty of manure produc ed by livestock, and so on. At the same time, scientific management and measurem ents have been employed; rational irrigation and drainage system has been establ ished; reclamation, amendment and fertilization of soil, and suitable strategies of cropping practices have been made for the sustainable development of agricul ture. Great progress has been made during 1996-2000.

关键词： sustainable agriculture development saline-alkali soil songnen plain

SYNTHESIS OF ADENOSINE DERIVATIVES WITH CARBOXYALKYL SIDE CHAIN AT 2',3'OR 5'POSITION

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Chinese Chemical Letters 1993年第12期4卷 1053-1056页

作者： Zeng li song jun Dong ZHANG li He ZHANG School of Pharmaceutical Sciences,Beijing Medical University,Beijing 100083.

Some nucleoside carhoxylic acid derivatives,such as(±)ethyl ester of griseolic acid (4)and 9-(2'-deoxy-2'-(benzyloxycarbonyl)-methylene-β-D-rihohept-2'-enofuranosyluranate)adenine (11),were *** formation of lactone of 5'-deoxy-adenosineacetic acid(AAA,3)was investigated by using different reagents for lactonization from AAA,but all of the efforts failed, and sone unexpected compounds were obtained.

关键词： DMSO HNMR 亚砜 FAB OR 5’POSITION SYNTHESIS OF ADENOSINE DERIVATIVES WITH CARBOXYALKYL SIDE CHAIN AT 2 AT