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Explicit Solutions of (2+1)-Dimensional Canonical Generalized KP, KdV, and (2+1)-Dimensional Burgers Equations with Variable Coefficients

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Communications in Theoretical Physics 2009年第11期52卷 784-790页

作者： ZHANG lin-lin liu Xi-Qiang School of Mathematical Sciences Liaocheng University Liaocheng 252059 China

In this paper, using the generalized （G1/G）-expansion method and the auxiliary differential equation method, we discuss the （2＋1）-dimensional canonical generalized KP （CGKP）, KdV, and （2＋1）-dimensional Burgers equations with variable coetticients. Many exact solutions of the equations are obtained in terms of elliptic functions, hyperbolic functions, trigonometric functions, and rational functions.

关键词： generalized (G1/G)-expansion method auxiliary equation exact solution

Structural design of Cr/GLC films for high tribological performance in artificial seawater:Cr/GLC ratio and multilayer structure

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Journal of Materials Science & Technology 2018年第8期34卷 1273-1280页

作者： Lei Li Peng Guo lin-lin liu Xiaowei Li Peiling Ke Aiying Wang Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences Beijing 100049China

In this paper, graphite-like carbon （GLC） films with Cr buffer layer were fabricated by DC magnetron sputtering technique with the thickness ratio of Cr to GLC films varying from 1：2 to 1：20. The effect of Cr]GLC modulation ratio on microstructure, mechanical and tribological properties in artificial seawater was mainly investigated by scanning electron microscopy （SEM）, energy dispersive spectroscopy （EDS）, nano-indenter and a reciprocating sliding tribo-meter. The propagation of defects plays an important role in the evolution of delamination, which is critical to wear failure of GLC films in artificial seawa- ter. Designing the proper multilayer structure could inhibit the defects propagation and thus protect the basis material. The multilayer Cr/GLC film with optimized ratio of 1：3 demonstrates a low average friction coefficient of 0.08 ± 0.006 and wear rate of （2.3 ± 0.3） × 10^-8 mm3/（N m） in artificial seawater, respectively.

关键词： Cr/GLC films Multilayer Modulation ratio Tribological properties

Progress on low susceptibility mechanisms of transmissible spongiform encephalopathies

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Zoological Research 2014年第5期35卷 436-445页

作者： Li-Li QING Hui ZHAO lin-lin liu Laboratory of Conservation and Utilization of Bio-resources Yunnan University

Transmissible spongiform encephalopathies （TSEs）, also known as prion diseases, are a group of fatal neurodegenerative diseases detected in a wide range of mammalian species. The ＂protein-only＂ hypothesis of TSE suggests that prions are transmissible particles devoid of nucleic acid and the primary pathogenic event is thought to be the conversion of cellular prion protein （PrPc） into the disease-associated isoform （prpSc）. According to susceptibility to TSEs, animals can be classified into susceptible species and low susceptibility species. In this review we focus on several species with low susceptibility to TSEs： dogs, rabbits, horses and buffaloes. We summarize recent studies into the characteristics of low susceptibility regarding protein structure, and biochemical and genetic properties.

关键词： Transmissible spongiform encephalopathy Low susceptibility Dog Rabbit Horse Buffalo PRNP SPRN

Experimental observations of ferroelectricity in double pyrochlore Dy2Ru2O7

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Frontiers of physics 2014年第1期9卷 82-89页

作者： Zai-Chun Xu Mei-Feng liu lin lin Huimei liu Zhi-Bo Yan Jun-Ming liu Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 China

Double pyrochlore Dy2Ru207 is synthesized and its magnetism and ferroelectricity below the Ru4＋ spin ordering temperature （NI00 K） are investigated. The ferroelectric transition appears at -18 K, much higher than the Dy3＋ spin ordering point at -1.8 K and lower than the Ru4＋ spin ordering point at -100 K. The measured electric polarization at ,-2 K is as big as 145℃/m2 in the polycrystalline samples. It is argued that the ferroelectricity is possibly ascribed to the electric dipole ordering arising from the collective monopole excitations in the Dy3＋ tetrahedrons in prior to the Dy3＋ spin ordering into spin-ice like state below -1.8 K.

关键词： pyrochlore oxides multiferroics magnetically induced ferroelectricity

Expression of BSE-associated proteins in the CNS and lymphoreticular tissues of cattle and buffalo

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Science Bulletin 2016年第17期61卷 1377-1383页

作者： Hui Zhao Si-Qi Wang Li-Li Qing lin-lin liu Ya-Ping Zhang State Key Laboratory for Conservation and Utilization of Bioresource Yunnan University Kunming 650091 China School of Life Science Yunnan University Kunming 650091 China State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming 650223 China

Bovine spongiform encephalopathy(BSE),which has been documented in 190,000 cases of BSE-infected cattle,to our knowledge,has not been reported in *** protein(PrP) is critical to susceptibility and development of ***,a new PrP-like protein,Shadoo(Sho),has been shown to have overlapping expression patterns and shared functions with ***,we hypothesize that differences in expression at the transcriptional level and/or the post-transcriptional level of the two genes may be associated with these specific differences between cattle and *** compared the relative mRNA expression of the prion protein gene(PRNP) and the Shadoo gene(SPRN) in 3% RNA samples using real-time *** also analyzed PrP/Sho protein from 96 samples by Western *** results demonstrated significantly lower PrP expression in the cerebellum,obex,mesenteric lymph node,and bronchial lymph node tissues,but higher relative expression of Sho in the cerebrum and spleen in buffalos compared with *** these results support our primary assumption,Sho and PrP expressions did not correlate with corresponding mRNA expression,suggesting that the biological modulations of both PrP and Sho proteins are at post-translational ***,positive correlations between PRNP and SPRN were found in cattle and buffalo cerebrum as well as in buffalo ***,negative correlations between PrP and Sho were detected in buffalo cerebellum and obex *** findings suggest that additional post-transcriptional studies are warranted to elucidate mechanisms behind prion diseases.

关键词： BSE PRNP SPRN Cattle Buffalo

Repetitive training for ameliorating upper limbs spasm of hemiplegic patients

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Neural Regeneration Research 2006年第7期1卷 670-672页

作者： lin Zhu lin liu Weiqun Song Department of Rehabilitation Xuanwu Hospital of Capital Medical University Beijing 100053China Department of RehabilitationXuanwu Hospital of Capital Medical University Beijing 100053China Department of RehabilitationXuanwu Hospital of Capital Medical University Beijing 100053China

BACKGROUND: The main aim of rehabilitation is to ameliorate motor function and use the damaged limbs in the activities of daily living. Several factors are needed in the self-recovery of the patients, and the most important one is to reduce spasm. Some mechanical repetitive movements can affect and change the excitability of motor neurons. OBJECTIVE: To observe the effect of repetitive training on ameliorating spasm of upper limbs of hemiplegic patients. DESIGN: A self-controlled observation before and after training. SETTING: Department of Rehabilitation, Xuanwu Hospital of Capital Medical University. PARTICIPANTS: Seven hemiplegic patients induced by brain injury were selected from the Department of Rehabilitation, Xuanwu Hospital, Capital Medical University from March to June in 2005. Inclusive criteria: ① Agreed and able to participate in the 30-minute training of hand function; ② Without disturbance of understanding. The patients with aphasia or apraxia, manifestation of shoulder pain, and severe neurological or mental defects. For the 7 patients, the Rivermead motor assessment (RMA) scores ranged 0-10 points, the Rivermead mobility index (RMI) ranged 1-3, and modified Ashworth scale (MAS) was grade 2-4. Their horizontal extension of shoulder joint was 0°-30°, anteflextion was 0°-50°, internal rotation was 50°-90°, external rotation was 0°-10°; and the elbow joint could extend for 15°-135°. METHODS: The viva 2 serial MOTOmed exerciser (Reck Company, Germany) was used. There were three phases of A-B-A. ① The phase A lasted for 1 week. The patient sat on a chair facting to the MOTOmed screen, and did the circumduction of upper limbs forwardly, 30 minutes a day and 5 days a week. ② The phase B lasted for 3 weeks. The training consisted of forward circumduction of upper limbs for 15 minutes, followed by backward ones for 15 minutes and 5-minute rest. ③ The training in the phase A was performed again for 2 weeks. The extensions of upper limbs were recorded at phase

关键词： limbs minutes shoulder repetitive rehabilitation rotation joints spasm persist neurological

Study on cellular internalization of poly(vinyldiaminotriazine)-based hydrogen bonding type non-viral transgene vector

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Chinese Science Bulletin 2008年第15期53卷 2307-2314页

作者： YE GuiXiang CAO ZhiQiang lin lin CHEN DaYong liu WenGuang School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional Materials Tianjin UniversityTianjin 300072 China

Previously we successfully prepared poly(vinyldiaminotriazine)(PVDT)-based non-viral vectors which complexed plasmid DNA via hydrogen bonding with adenine-thymine base pairs. In this report, surface charges and complex sizes of this system were further examined. The results showed that PVDT-based polymer could cover surface charges of DNA resulting in slightly negative or neutral complexes. It was also found that the complex sizes were governed by two events: the aggregation induced by the insta-bility of neutral particles, and more compact complexes produced by PVDT-based polymers. In the study of cellular uptake, chlorpromazine and filipin Ⅲ were used to inhibit clathrin- and caveolae-me- diated endocytosis, respectively. We found that PVDT-based systems were transported into cells via a non-clathrin, non-caveolae mediated endocytosis. This special process was studied by temperature inhibition and kinetics assays. It was revealed that such a pathway was characterized by (i) a more en-ergy dependent process and (ii) a much slow transfection-effective internalization.

关键词：聚乙烯络合物氢键细胞提取

Aggregation structures of organic conjugated molecules on their optoelectronic properties

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Chinese Chemical Letters 2016年第8期27卷 1350-1356,1469页

作者： Jia-Dong Zhou Wen-Qiang Zhang lin-lin liu Zeng-Qi Xie Yu-Guang Ma Institute of Polymer Optoelectronic Materials & Devices State Key Laboratory of Luminescent Materials & DevicesSouth China University of Technology

The intimate connection between stacking modes and optoelectronic properties of organic conjugated materials has been discussed from the viewpoints of developing microscopic models and further understanding of their functions and potential *** particular,three basal dimer configurations（cofacial configuration,staggered configuration,and crossed configuration） and their respective optical（including radiative and non-radiative） and electrical properties are expatiated in ***,we put forward the perspective on achieving the promising laser material that features high fluorescence quantum yield and charge mobility.

关键词： Fluorescence efficiency Mobility Aggregation Transition dipole

Quantitative analysis of optic disc changes in school-age children with ametropia based on artificial intelligence

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International Journal of Ophthalmology(English edition) 2023年第11期16卷 1727-1733页

作者： Fang liu Xing-Hui Yu Yu-Chuan Wang Miao Cao Lian-Feng Xie Jing liu lin-lin liu The First Clinical Medical College of Gannan Medical University Ganzhou 341000Jiangxi ProvinceChina Department of Ophthalmology the First Affiliated Hospital of Gannan Medical UniversityGanzhou 341000Jiangxi ProvinceChina

AIM:To explore changes in the optic disc and peripapillary atrophy(PPA)in school-age children with ametropia using color fundus photography combined with artificial intelligence(AI)***:Based on the retrospective case-controlled study,226 eyes of 113 children aged aged 6–12y were enrolled from October 2021 to May *** to the results of spherical equivalent(SE),the children were divided into four groups:low myopia group(66 eyes),moderate myopia group(60 eyes),high myopia group(50 eyes)and emmetropia control group(50 eyes).All subjects underwent un-aided visual acuity,dilated pupil optometry,best-corrected visual acuity(BCVA),intraocular pressure,ocular axis measurement and color fundus ***:The width of PPA,horizontal diameter ratio of PPA to the optic disc and area ratio of PPA to the optic disc were significantly different among the four groups(P<0.05).The width of the nasal and temporal neuroretinal rim,the roundness of the optic disc,the height of PPA,the vertical diameter ratio of PPA to the optic disc,and the average density of PPA in the high myopia group were significantly different compared with the other three groups(P<0.05).There were strong negative correlations between SE and area ratio of PPA to the optic disc(r=-0.812,P<0.001)and strong positive correlation between axial length(AL)and area ratio of PPA to the optic disc(r=0.736,P<0.001).CONCLUSION:In school-age children with high myopia,the nasal and temporal neuroretinal rims are narrowed and even lost,which have high *** area ratio of the PPA to the optic disc could be used as an early predictor of myopia progression,which is of great significance for the development prevention and management of myopia.

关键词： optic disc artificial intelligence ametropia peripapillary atrophy spherical equivalent