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A Novel 3D Supramolecular Network Constructed from [Cu(4,4'-bipyridine)(O_2CMe)_2]_2 Molecular Ladders by Hydrogen Bonding

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Chinese Journal of Structural Chemistry 2006年第11期25卷 1365-1368页

作者： yanG E WANG Xiao-qin qin Ye-yan College of Chemistry ＆ Materials Science Fujian Normal University Fuzhou 350007 China Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou 350002 China

The title complex, {[Cu2（4,4＇-bipyridine）2（μ-O2CMe）2（O2CMe）2],H2O}n 1, was synthesized and structurally characterized by X-ray crystallography. It crystallizes in monoclinic, space group C2/c with a = 13.4474（5）, b = 11.7566（2）, c = 19.5380（6）A, β = 92.930（2）°, V = 3084.84（16） A^3, Z = 4, Cu2C28N409H30, Mr = 693.64, Dc = 1.494 g/cm^3, F（000） = 1424 and μ（MoKα） = 1.436 mm^-1. With the use of 2062 observed reflections （I 〉 2σ（I））, the structure was refined to R = 0.0769 and wR = 0.2154. In complex 1, the dimeric copper acetate units are linked through 4,4’-bipyridine to yield ID molecular ladders. These ladders are connected via O-H…O hydrogen bonds to generate 2D layers, which are further linked through C-H…O hydrogen bonds to give a 3D supramolecular network.

关键词： molecular ladder dimeric copper acetate 3D supramolecular network

单片机的16×16动态扫描LED点阵模块设计

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福建电脑 2025年第1期41卷 37-40页

作者：张海勇秦艳武汉东湖学院电子信息工程学院武汉430212 武汉光迅科技股份有限公司模块开发部武汉430205

为实现静态字符和滚动字符的显示,本文设计了一个16×16单色点阵显示模块。采用4片8×8单色点阵模块构成16×16点阵模块,并使用Altium Designer进行电路原理图和印刷电路板的整体设计。控制系统基于51单片机最小系统,显示程序在Keil C5... 详细信息

为实现静态字符和滚动字符的显示,本文设计了一个16×16单色点阵显示模块。采用4片8×8单色点阵模块构成16×16点阵模块,并使用Altium Designer进行电路原理图和印刷电路板的整体设计。控制系统基于51单片机最小系统,显示程序在Keil C51环境中编写,芯片选用74HC595和74HC138。该模块设计整体工作量较小,设计过程有益于锻炼实际动手能力以及提高分析问题和解决问题的能力。

关键词：点阵模块电路设计显示程序硬件驱动

The development of graphene-based devices for cell biology research

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Frontiers of Materials Science 2014年第2期8卷 107-122页

作者： Zhi-qin yan Wei ZHANG School of Mechanical Jinzhong University Yuci Jinzhong 030600 China CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety National Center for Nanoscience and Technology 11 Beiyitiao 7hongguancun Beijing 100190 China

Graphene has emerged as a new carbon nanoform with great potential in many applications due to its exceptional physical and chemical properties. Especially, graphene and its derivatives are also gaining a lot of interest in the biomedical field as new components for biosensors, tissue engineering, and drug delivery. This review presents unique properties of graphene, the bio-effects of graphene and its derivatives, especially their interactions with cells and the development of graphene-based biosensors and nanomedicines for cancer diagnosis and treatment.

关键词： graphene graphene oxide (GO) cell sensor cancer

Primal-dual Interior-point Algorithms for Second-order Cone Optimization Based on a New Parametric Kernel Function

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Acta Mathematica Sinica,English Series 2007年第11期23卷 2027-2042页

作者： yan qin BAI Guo Qiang WANG Department of Mathematics College of Sciences Shanghai University Shanghai 200444 P. R. China College of Vocational Technology Shanghai University of Engineering Science Shanghai 200437 P. R. China

A class of polynomial primal-dual interior-point algorithms for second-order cone optimization based on a new parametric kernel function, with parameters p and q, is presented. Its growth term is between linear and quadratic. Some new tools for the analysis of the algorithms are proposed. The complexity bounds of O（√Nlog N log N/ε） for large-update methods and O（√Nlog N/ε） for smallupdate methods match the best known complexity bounds obtained for these methods. Numerical tests demonstrate the behavior of the algorithms for different results of the parameters p and q.

关键词： second-order cone optimization linear optimization interior-point methods large- and small-update methods polynomial-time complexity

Effect of small peptide(P-15) on HJMSCs adhesion to hydroxyap-atite

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Science China(Physics,Mechanics & Astronomy) 2016年第2期59卷 102-107,109-112页

作者： Wei Cheng Xin Tong qin Gang Hu Yong Bin Mou Hai yan qin Nanjing Stomatological Hospital Medical School of Nanjing University Central Laboratory of Stomatology Nanjing Stomatological Hospital

P-15, a synthetic peptide of 15-amino acids, has been tested in clinical trials to enhance cell adhesion and promote osseointe-gration. This feature of P-15 has also inspired the development of designing new bone substitute materials. Despite the increasing applications of P-15 in bone graft alternatives, few studies focus on the mechanism of cell adhesion promoted by P-15 and the mechanical property changes of the cells interacting with P-15. In this article, we used atomic force microscope(AFM) based single cell indentation force spectroscopy to study the impact of P-15 on the stiffness and the adhesion ability of human jaw bone mesenchymal stem cells(HJMSCs) to hydroxyapatite(HA). We found that the stiffness of HJMSCs increases as the concentration of P-15 grows in short culture intervals and that the adhesion forces between HJMSCs and HA particles in both the presence and absence of P-15 are all around 30 p N. Moreover, by calculating the binding energy of HJMSCs to HA particles mixed with and without P-15, we proved that P-15 could increase the adhesion energy by nearly four times. Scanning electron microscope(SEM) was also exploited to study the morphology of HJMSCs cultured in the presence and absence of P-15 on HA disc surface for a short term. Apparent morphological differences were observed between the cells cultured with and without P-15. These results explain the probable underlying adhesion mechanism of HJMSC promoted by P-15 and can serve as the bases for the design of bone graft substitute materials.

关键词： atomic force microscopy (AFM) cell stiffness force spectroscopy

A Kind of Unified Strict Efficiency via Improvement Sets in Vector Optimization

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Journal of the Operations Research Society of China 2018年第4期6卷 557-569页

作者： Hui Guo yan-qin Bai Department of Mathematics Chongqing Normal UniversityChongqing 401331China College of Sciences Shanghai UniversityShanghai 200444China

In this paper,we propose a kind of unified strict efficiency named E-strict efficiency via improvement sets for vector *** kind of efficiency is shown to be an extension of the classical strict efficiency andε-strict efficiency and has many desirable *** also discuss some relationships with other properly efficiency based on improvement sets and establish the corresponding scalarization theorems by a base-functional and a nonlinear ***,some examples are given to illustrate the main conclusions.

关键词： E-strict efficiency Improvement sets Linear scalarization Nonlinear scalarization Vector optimization

Exact Solutions of a Generalized Multi-Fractional Nonlinear Diffusion Equation in Radical Symmetry

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Communications in Theoretical Physics 2009年第11期52卷 857-861页

作者： LIU yan-qin MA Jun-Hai School of Management Tianjin University Tianjin 300072 China Department of Mathematics Dezhou University Dezhou 253023 China

This paper is devoted to investigating exact solutions of a generalized fractional nonlinear anomalousdiffusion equation in radical *** presence of external force and absorption is also *** firstinvestigate the nonlinear anomalous diffusion equations with one-fractional derivative and then multi-fractional *** situations,we obtain the corresponding exact solutions,and the solutions found here can have a compact behavioror a long tailed behavior.

关键词： fractional derivative multi-fractional diffusion equation anomalous diffusion equation

A New Kernel Function Yielding the Best Known Iteration Bounds for Primal-Dual Interior-Point Algorithms

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Acta Mathematica Sinica,English Series 2009年第12期25卷 2169-2178页

作者： yan qin BAI Jin LiGUO Cornelis ROOS Department of Mathematics Shanghai University Shanghai 200436 P. R. China Business School University of Shanghai for Science and Technology Shanghai 200093 P. R. China Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technology P.O. Box 5031 2600 GA Delft The Netherlands

Kernel functions play an important role in defining new search directions for primal-dual interior-point algorithm for solving linear optimization problems. In this paper we present a new kernel function which yields ... 详细信息

关键词： linear optimization interior-point method primal-dual method large-update method polynomial complexity

One-step straightfoward solid synthesis of high yield white fluorescent carbon dots for white light emitting diodes

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Chinese Chemical Letters 2021年第2期32卷 591-593页

作者： Bingyan Han Jingmei Jiang Qifang yan Ze Xina qin yan State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116023China School of Chemical Engineering Dalian University of TechnologyPanjin 124221China

Herein,we directly prepared white fluorescent CDs(W-CDs) using 1,6-dihydroxynaphthalene(1,6-DHN)and L-asparagine(L-Asn) as carbon sources through a simple solvent-free ***-prepared W-CDs can be obtained in high yield(95%).A relative pure white LEDs(WLEDs) were fabricated with Commission Internationale de Eclairage(CIE) coordinates of(0.32,0.31).As-prepared W-CDs will have promising future for a wide range of optoelectronic devices.

关键词： Fluorescent carbon dots Solid synthesis High yield White LEDs One-step