小波方法及其在彈性介質(zhì)特異性粘附問題中的應(yīng)用
[Abstract]:Cells are the basic units of an organism, such as the human body, which consists of tens of billions of cells. Eukaryotic cells need to form adhesive contact with other cells or extracellular matrix through the specific binding of surface receptors to ligand molecular bonds. We call this action specific adhesion distinct from conventional adhesion behavior based on inter-molecular van der Waals force. Cell specific adhesion is the basis of many physiological pathology, such as cell recognition, signal transduction, tumor metastasis and wound healing. The study of related mechanism has important theoretical significance and biomedical application value because of the coupling between elastic behavior of medium and intermolecular chemical reaction. Cell-specific adhesion systems can be abstracted as adhesion structures between soft elastic media via chemically reactive molecular bonds. The corresponding mathematical description often involves the initial-boundary value problem of strongly nonlinear singular integro-differential equations. The accurate quantitative solution of this kind of problem is undoubtedly a great challenge in the field of numerical analysis, and there is still no mature method to solve this kind of problem. The lack of quantitative analysis directly hinders the understanding of cell-specific adhesion. In this paper, based on wavelet theory, a new method for solving the initial-boundary value problems of strongly nonlinear singular integro-differential equations is proposed. Based on the establishment of a specific adhesion model of elastic media via molecular bond clusters, the adhesion strength and stability time of the adhesive system were quantitatively analyzed. The main research results are as follows: (1) based on wavelet theory, A unified solution method is proposed for a class of strongly nonlinear singular integro-differential equations with initial boundary value problem. (2) considering the random dynamic process of adhesion molecules and the contact mechanics principle between two soft elastomer contact interfaces, A specific adhesion model of elastic medium via molecular bond cluster is established. (3) based on the proposed solution, the specific adhesion model of elastic medium via molecular bond cluster is quantitatively analyzed. And the study found that: a. The stress concentration of the two ends of the adhesion region is obvious, and the stress concentration is more obvious with the increase of the stress concentration factor, and when the external load is large, the adhesion failure develops from the two ends to the middle. The shape of the contact interface can obviously affect the stress distribution of the interface, and we can change the stress distribution by changing the shape of the interface. The smaller the stress concentration factor is, the greater the reclosure rate of a single broken molecular bond is, and the greater the adhesion strength is. The external load and contact interface angle can significantly affect the specific adhesion, the greater the loading angle, the smaller the adhesion strength and the longer the stable time. The adhesion strength is related to the loading rate, and the adhesion strength increases with the increase of the loading rate, but the increasing amplitude decreases. These results will be helpful to our understanding of specific adhesion and future research work.
【學位授予單位】:蘭州大學
【學位級別】:碩士
【學位授予年份】:2016
【分類號】:Q27;O175
【相似文獻】
相關(guān)期刊論文 前10條
1 Adels·Saada;王本湘;;半無限彈性介質(zhì)和有關(guān)的一些問題[J];河北地質(zhì)學院學報;1979年04期
2 田春林 ,吳曉明 ,王育生;復合彈性介質(zhì)特性研究[J];齊齊哈爾輕工學院學報;1985年01期
3 李永池,劉魯峰,唐之景;非線性彈性介質(zhì)中沖擊波斜反射的研究[J];爆炸與沖擊;1988年01期
4 王彪,王殿富;含隨機裂紋場的彈性介質(zhì)(英文)[J];哈爾濱工業(yè)大學學報;1988年02期
5 吳培明;;小軸向力影響下的彈性介質(zhì)中的梁[J];西南交通大學學報;1989年04期
6 方曉樂;彈性粘滯介質(zhì)對波的吸收[J];河南師范大學學報(自然科學版);1992年03期
7 蔣中明;徐衛(wèi)亞;張新敏;馮樹榮;;彈性介質(zhì)邊坡模糊有限元方法研究[J];巖土力學;2008年05期
8 F.Aminzadeh;顧賢民;;用反射系數(shù)矩陣求彈性介質(zhì)層參數(shù)[J];世界地質(zhì);1985年Z1期
9 顧浩鼎;陳運泰;;旋轉(zhuǎn)運動、旋轉(zhuǎn)矩定律及彈性介質(zhì)動力學關(guān)系[J];科學;1997年06期
10 林福忠;;熱電彈性兩種狀態(tài)的等效方程分析[J];龍巖學院學報;2007年06期
相關(guān)會議論文 前9條
1 劉洪;;橫向非均勻彈性介質(zhì)方向波響應(yīng)的積分表示[A];中國科學院地質(zhì)與地球物理研究所2008學術(shù)論文匯編[C];2009年
2 陳湛文;李幼銘;;利用全波形記錄的彈性介質(zhì)三參數(shù)等相位面法層析成象[A];1995年中國地球物理學會第十一屆學術(shù)年會論文集[C];1995年
3 錢小三;張俊乾;;微管在彈性介質(zhì)中的波的傳播[A];慶祝中國力學學會成立50周年暨中國力學學會學術(shù)大會’2007論文摘要集(下)[C];2007年
4 劉克安;劉宏偉;郭寶琦;;雙相介質(zhì)二維波動方程孔隙率反演的時卷正則迭代法[A];1995年中國地球物理學會第十一屆學術(shù)年會論文集[C];1995年
5 李忱;楊桂通;黃執(zhí)中;;各向同性彈性介質(zhì)非線性本構(gòu)方程[A];第18屆全國結(jié)構(gòu)工程學術(shù)會議論文集第Ⅰ冊[C];2009年
6 李勝軍;高建虎;;彈性介質(zhì)中的球面波AVO分析[A];中國地球物理學會第二十七屆年會論文集[C];2011年
7 陶瑋;沈正康;萬永革;單新建;馬超;;根據(jù)InSAR同震測量資料反演東昆侖斷裂兩側(cè)地殼彈性介質(zhì)差異[A];中國地球物理學會第22屆年會論文集[C];2006年
8 蔣維強;;基巖凹陷地形對SH波入射時地面運動的影響[A];1990年中國地球物理學會第六屆學術(shù)年會論文集[C];1990年
9 沈建中;鄧京軍;鈕金真;;各向異性彈性介質(zhì)中聲速度的普適解析表達式[A];中國聲學學會2002年全國聲學學術(shù)會議論文集[C];2002年
相關(guān)重要報紙文章 前1條
1 董映璧;超聲波水中高速傳播理論分歧終有定論[N];科技日報;2006年
相關(guān)博士學位論文 前1條
1 劉敬喜;(黏)彈性介質(zhì)中充液圓柱殼的動態(tài)特性研究[D];華中科技大學;2006年
相關(guān)碩士學位論文 前7條
1 董茜茜;基于多孔彈性介質(zhì)理論的高濃紙漿力學行為研究[D];河北大學;2015年
2 毛金為;小波方法及其在彈性介質(zhì)特異性粘附問題中的應(yīng)用[D];蘭州大學;2016年
3 李國平;組分K型黏彈性介質(zhì)及其波場特征研究[D];中國地質(zhì)大學(北京);2007年
4 朱偉;孔隙彈性介質(zhì)中的損傷因子研究[D];中國地質(zhì)大學;2010年
5 邊婧;非均勻飽和孔隙彈性介質(zhì)聲場數(shù)值模擬研究[D];大慶石油學院;2007年
6 陳樟龍;多孔彈性介質(zhì)動力Green函數(shù)及層狀土動力分析的傳遞矩陣法[D];浙江工業(yè)大學;2014年
7 張海剛;具有彈性海底的海洋環(huán)境中聲場計算研究[D];哈爾濱工程大學;2006年
,本文編號:2310850
本文鏈接:http://sikaile.net/kejilunwen/yysx/2310850.html