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Study of C_(70) Adsorbed on Silver Surface by Surface Enhanced Raman Scattering

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Chinese Physics letters 1997年第7期14卷 513-516页

作者： HUANg ya-bin MO yu-jun g.Mattei M.Pagnnane XIE Si-shen Department of Physics He’nan UniversityKaifeng 475001 Istituto di MAI CNRC.P.1000016 Monterotondo S.(Rome)Italy Institute of Physics Chinese Academy of SciencesBeijing 100080

Twelve new features from our Raman measurements of C_(70) have been observed by using the silver surface enhanced Raman scattering substrate with very high enhanced factor and highly sensitive Raman *** results and discussion in this letter would make new knowledge to vibration modes of C_(70).The experimental data of the study confirm the validity of Jishi's calculation with a small error.

关键词： set silver letter

Synthesis and characterization of a novel series of pyrimidinylthiaalkoxycalix[4]arenes

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Chinese Chemical letters 2007年第4期18卷 403-406页

作者： Bing Zhao ya Qing Feng yu Kun Li School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

A novel series of pyrimidinylthiaalkoxycalix[4]arenes with the reaction between 4,6-dimethylpyrimidine-2-thiol and the different dibromides calix[4]aryl groups have been synthesized and structurally characterized by IR, 1H NMR and MS. From their analysis data, it was found that compounds 8, 9, 11 adopted a cone conformation, while compound 10 existed as a mixture of conformations.

关键词： Pyrimidinylthiaalkoxycalixarenes Synthesis Characterization Conformation

Critical signaling pathways during Wallerian degeneration of peripheral nerve

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Neural Regeneration Research 2017年第6期12卷 995-1002页

作者： Qiong Cheng ya-xian Wang Jun yu Sheng Yi Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education Co-innovation Center of Neuroregeneration Nantong University

Wallerian degeneration is a critical biological process that occurs in distal nerve stumps after nerve injury. To systematically investigate molecular changes underlying Wallerian degeneration, we used a rat sciatic nerve transection model to examine microarray analysis outcomes and investigate significantly involved Kyoto Enrichment of genes and genomes（KEgg） pathways in injured distal nerve stumps at 0, 0.5, 1, 6, 12, and 24 hours, 4 days, 1, 2, 3, and 4 weeks after peripheral nerve injury. Bioinformatic analysis showed that only one KEgg pathway（cytokine-cytokine receptor interaction） was significantly enriched at an early time point（1 hour post-sciatic nerve transection）. At later time points, the number of enriched KEgg pathways initially increased and then decreased. Three KEgg pathways were studied in further detail： cytokine-cytokine receptor interaction, neuroactive ligand-receptor interaction, and axon guidance. Moreover, temporal expression patterns of representative differentially expressed genes in these KEgg pathways were validated by real time-polymerase chain reaction. Taken together, the above three signaling pathways are important after sciatic nerve injury, and may increase our understanding of the molecular mechanisms underlying Wallerian degeneration.

关键词： degeneration signaling cytokine distal guidance enriched representative underlying oncogene systematically

The residual symmetry,Bäcklund transformations,CRE integrability and interaction solutions:(2+1)-dimensional Chaffee–Infante equation

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Communications in Theoretical Physics 2023年第11期75卷 30-37页

作者： Nursena günhan Ay Emrullah yaşar Department of Mathematics Faculty of Engineering and Natural Sciencesİstanbul Medeniyet University34700ÜsküdarIstanbulTurkey Department of Mathematics Faculty of Arts and SciencesUludag University16059 BursaTurkey

In this paper,we consider the(2+1)-dimensional Chaffee-Infante equation,which occurs in the fields of fluid dynamics,high-energy physics,electronic science *** build Bäcklund transformations and residual symmetries in nonlocal structure using the Painlevétruncated expansion *** use a prolonged system to localize these symmetries and establish the associated one-parameter Lie transformation *** this transformation group,we deliver new exact solution profiles via the combination of various simple(seed and tangent hyperbolic form)exact solution *** this manner,we acquire an infinite amount of exact solution forms ***,we demonstrate that the model may be integrated in terms of consistent Riccati *** the Maple symbolic program,we derive the exact solution forms of solitary-wave and soliton-cnoidal *** 3D and 2D illustrations,we observe the dynamic analysis of the acquired solution forms.

关键词： (2+1)-dimensional Chaffee-Infante equation Painlevétruncated exapansion approach dynamic analysis Bäcklund transformations residual symmetries

New Explicit Rational Solitary Wave Solutions for Discretized mKdV Lattice Equation

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Communications in Theoretical Physics 2005年第6X期44卷 1011-1014页

作者： yu ya-Xuan WANg Qi ZHANg Hong-Qing Department of Applied Mathematics Dalian University of Technology Dalian 116024 China Key Laboratory of Mathematics Mechanization the Chinese Academy of Sciences Beijing 100080 China

In this letter, we study discretized mKdV lattice equation by using a new generalized ansatz. As a result,many explicit rational exact solutions, including some new solitary wave solutions, are obtained by symbolic co... 详细信息

关键词： differential-difference equations discretized mKdV lattice equation solitary wave solution rational expand method

Aromatic Multicarboxylate Ligands Tuned One-and Three-dimensional Zn(Ⅱ) Coordination Polymers Based on 3-(1H-pyrazol-4-yl)-5-(pyridin-3-yl)-1,2,4-triazole

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Chinese Journal of Structural Chemistry 2019年第8期38卷 1329-1336页

作者： WANg yu-Fang WANg Li-ya College of Chemistry and Chemical Engineering and Henan Key Laboratory of Function-oriented Porous MaterialsLuoyang Normal UniversityLuoyang 471934China College of Chemistry and Pharmaceutical Engineering Nanyang Normal UniversityNanyang 473000China

Two aromatic multicarboxylate ligands tuned Zn(Ⅱ) coordination polymers, namely, {[Zn0.5(H2L)(tp)0.5(H2O)]H2O}n(1) and {[Zn2(HL)(btc)(H2O)]H2O}n(2)(H2L = 3-(1 Hpyrazol-4-yl)-5-(pyridin-3-yl)-1,2,4-triazole, H2tp = terephthalic acid;H3 btc = 1,3,5-benzenetricarboxylic) have been synthesized. Their structures were characterized by single-crystal X-ray diffraction analysis, elemental analyses and infrared spectra. Compound 1 possesses a one-dimensional chain structure and is finally extended into a three-dimensional supramolecular architecture though hydrogen bonding interactions. Compound 2 shows a three-dimensional framework. Meanwhile, compounds 1 and 2 exhibit luminescent emission in the solid, and can be investigated as potential luminescent materials.

关键词： coordination polymer 3-(1H-pyrazol-4-yl)-5-(pyridin-3-yl)-1,2,4-triazole aromatic multicarboxylate luminescence

Parametric geometric Model and Hydrodynamic Shape Optimization of A Flying-Wing Structure Underwater glider

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China Ocean Engineering 2017年第6期31卷 709-715页

作者： WANg Zhen-yu yu Jian-cheng ZHANg Ai-qun WANg ya-xing ZHAO Wen-tao State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110016 China University of Chinese Academy of Sciences Beijing 100049 China

Combining high precision numerical analysis methods with optimization algorithms to make a systematic exploration of a design space has become an important topic in the modern design methods. During the design process of an underwater glider＇s flying-wing structure, a surrogate model is introduced to decrease the computation time for a high precision analysis. By these means, the contradiction between precision and efficiency is solved effectively. Based on the parametric geometry modeling, mesh generation and computational fluid dynamics analysis, a surrogate model is constructed by adopting the design of experiment （DOE） theory to solve the multi-objects design optimization problem of the underwater glider. The procedure of a surrogate model construction is presented, and the gaussian kernel function is specifically discussed. The Particle Swarm Optimization （PSO） algorithm is applied to hydrodynamic design optimization. The hydrodynamic performance of the optimized flying-wing structure underwater glider increases by 9.1%.

关键词： surrogate model underwater glider design optimization blended-wing-body

θ-improved limited tolerance relation model of incomplete information system for evaluation of water conservancy project management modernization

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Water Science and Engineering 2013年第4期6卷 469-477页

作者： yu-qin gAO guo-hua FANg ya-qin LIU College of Water Conservancy and Hydropower Engineering Hohai University

The modernization of water conservancy project management is a complicated engineering system involving a management system, a management method, management personnel, the exertion of social, economic, and ecological effects, and so on. However, indices for evaluating the modernization of water conservancy project management are usually unobtainable in practical applications. Conducting appropriate extension of the classical rough set theory and then applying it to an incomplete information system are the key to the application of the rough set theory Based on analysis of some extended rough set models in incomplete information systems, a rough set model based on the θ-improved limited tolerance relation is put forward. At the same time, upper approximation and lower approximation are defined under this improved relation. According to the evaluation index system and management practices, the threshold for θ is defined. An example study indicates the practicability and maneuverability of the model.

关键词： Key words: modernization of water conservancy project management O-improved limitedtolerance relation model," upper and lower approximations," threshold

An Estimation of Component Activity of Vanadium-bearing Liquid Iron and Transition Temperature of Vanadium Oxidization Using MIVM

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Journal of Iron and Steel Research International 2015年第7期22卷 557-565页

作者： ya-yu LI Zhen-nan LIU Dong-ping TAO Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology

The component activity of Mn in Fe-C-Mn system as well as the component activities of C and Si in Fe-C-Si system was predicted by applying the pseudo-multicomponent approach of the molecular interaction volume model （MIVM） and the Wagner interaction parameter formalism （WIPF） respectively. The average relative errors between the predicted values of MIVM and the experimental data for the three components were 4.5 0%, 17.0% and 13.0 %, respectively, and those between the calculation results of the WIPF and the experimental data were 18.0K for Mn, 9.0% for C and 27.0% for Si. The results indicated that the MIVM method could better predict the component activity of carbonaceous iron-based solution. Based on the data in an actual blowing process, the MIVM method was applied to predict the component activities of C and V as well as the transition temperature of vanadium oxidization （TTVO） in Fe-C-V-Si quaternary iron-based solution, and a comparative analysis of the predictions against the ex- perimental data was carried out, with their average relative errors being 24.0% for C, 7.3% for V and 1.0% for TTVO respectively. On that basis, the TTVO at Panzhihua Iron and Steel （group） Co. , Ltd. was estimated by the MIVM method and an expression that the TTVO changed with composition and temperature of iron solutions was obtained by multiple linear regression method. The research results showed that the estimated values were in good agree- ment with the practical data.

关键词： thermodynamic model molecular interaction volume model activity vanadium-bearing liquid iron transition temperature