periodic potential 中文意思是什麼
periodic potential
解釋
周期電勢-
According to the nonlinear dynamical features of isi series, the firing pattern can be described as : ( 1 ) periodic firing pattern, which was characterized by repeated appearance of isi at regular interval. ( 2 ) bursting firing pattern, which was characterized by bursting interrupted by silent periods. isis of the action potential during the bursts were confined to a banding area
在觀察到的101例損傷drg神經元自發放電中，依據其動作電位isi的動力學特徵，可分為周期，其isi基本相等；陣發，在短陣放電之間有不規則的間斷；不規則，其isi互不相等；整數倍，其isi為基礎isi第四軍醫大學碩士論文的整數倍等四種基本型式。 -
It is the main purpose of this paper to calculate the energy splitting of ground state and excited states induced by thermally assisted quantum tunneling. first, a brief introduction is given for the theoretical and experimental studies on the magnetic macroscopic quantum effects. then, spin tunneling in a uniaxial ferromagnetic particle in transverse magnetic field is converted to a pseudoparticle moving in effective double - well potential with the help of the effective potential description of quantum spin systems developed by ulyanov and zaslavskii. finally using the periodic instanton method we evaluate the transition amplitude, energy shift and prefactor of wkb exponential and the energy splitting of ground state and the tunneling rate for excited states induced by thermally assisted quantum tunneling are obtained
文章首先對磁性宏觀量子效應的理論和實驗方面作了簡單介紹，然後藉助于ulyanov和zaslavskii發展的一種等效勢描述方法，把外磁場沿難磁化軸方向時的自旋隧穿約化成在等效雙勢阱中運動的粒子，利用瞬子方法給出基態能級劈裂，最後利用周期瞬子方法分別計算了隧穿幅、能級移動以及wkb前因子，從而給出由於熱助量子隧穿引起的激發態的隧穿率。 -
In kinesin ' s actual movement, it continuously changes its conformation to catalyze atp ' s hydrolysis. the role of microtubule is not a simple periodic potential
在實際運動中，馬達不斷進行著自身構象變化並催化atp水解，微管產生的勢場也不僅僅是一個簡單的周期勢函數。 -
The paper is concerned with periodic solutions to nonautonomous second order hamilton systems where, m : [ 0, t ] - s ( rn, rn ) is a continuous mapping in the space s ( rn, rn ) of symmetric real ( n x n ) - matrices, such that for some u > 0 and all ( t, z ) [ 0, t ] x rn, ( m ( t ) x, x ) > u | x | 2. a s ( rn, rn ), f : [ 0, t ] x rn r is continuous and f : [ 0, t ] xr r exists, is continuous and we study the existence of periodic solutions of the systems by using ekeland variational principle and the saddle points theorem. we suppose that the nonlinearity vf and potential f belongs to a class of unbounded functional. our work improves the existed results. we obtained the results of multiplicity of periodic solutions of the systems by using lusternik - schnirelman category theory and the generalized saddle points theorem, and the functional does not need the condition of constant definite. at last, we obtained the existence of infinity many distinct periodic solutions of the corresponding non - perturbation systems by using the symmetric mountain pass theorem
（ ? ， ? ）為r ~ n中內積， | ? |為對應范數。 f [ 0 ， t ] r ~ n r連續， ? f （ t ， x ）存在且連續， h l ~ 1 （ 0 ， t ； r ~ n ） 。利用ekeland變分原理和鞍點定理討論了該系統周期解的存在性，把非線性項和位勢函數放寬到一類無界函數，推廣了這方面工作的一些已有結果；利用廣義鞍點定理和lusternik - schnirelman疇數理論得到了該系統的多重周期解，取掉了泛函的常定要求；最後利用對稱山路定理得到沒有擾動時系統的無窮多周期解。 -
During audit committee meetings ， the audit committee will consider management ' s annual / periodic fraud risk assessment process, specifically including consideration of the potential for management override of controls or other inappropriate influences over the financial reporting process
審計委員會將在季度會議上審議管理層開展的欺詐風險評估過程，尤其必須關注在財務報告過程中管理層是否發生超權行為或施加其它不當影響。 -
A relaxation surface effect is simulated on the basis of a molecular dynamics using the eam ( embedded atom method ) potential by applying a periodic boundary condition for copper. surface atom ' s potential, stress and position changes are presented
運用分子動力學方法對納米單晶銅在接近絕對零度下的表面效應進行了分析，給出了表面原子位置變化、能量大小、應力的大小。 -
Quantization of the non - integrable ( chaotic ) systems of dcn vibration and henon - heiles potential were analyzed by the action integrals of periodic orbits
運用周期軌跡的作用量積分對dcn體系及henon - heiles體系的量子化問題進行研究。 -
The boundary radius of an atom ( ion ) is defined by the classical turning point equation ( ( r ) = - i, where i denotes the first ionization potential of the atom ( ion ). the boundary radii of atoms and ions of elements from first - to fifth - row in the periodic table are obtained
對于中性原子，假設此時的能量等於其第一電離能i的負值，即v （ r ） = - i 。我們定義原子核到r的距離為原子的內稟邊界半徑，簡稱為邊界半徑。 -
In large rotating machinery using filmatic bearing ( turbogenerator, air compressor, etc. ) there is a potential trouble from impefect installation or running conditions, a metals " contact between rotors and shells. the trouble is usully called rubbing. the advantage of ae technologe in the rubbing diagnosis and early detection is showed. instead of classical ae characteristic parameters ( counts, amplitude, energy, duration and the other ones ) a new feature extraction by frequency analysis of ae envelop signals is discussed. both research of ae process and field experements indicate that periodic components in the envelop spectrum related to rotational speed increase evidently at the beginning of rubbing production, hence are highly sensitive to the rubbing fault diagnosis. according to the new design an acoustic emission equipment for the rubbing diagnosis named buaa ae testing system is developed and described
汽輪發電機、空氣壓縮機等採用油膜支撐的大型轉動機械，由於安裝或運行中的原因，在轉子旋轉過程中，可能和器壁發生輕微的摩擦和碰擊，簡稱碰摩.聲發射技術在碰摩發生特別是故障早期診斷上有優越性.本系統的特點是沒有沿用傳統的計數、幅度、能量和持續時間等聲發射特性參數，而是在聲發射包絡信號的頻率分析中進行特徵提取.聲發射發生的過程分析和現場試驗都表明這種方法對碰摩檢測很敏感，在碰摩發生的起始階段，包絡譜中與轉速同步的周期性分量顯著增加.根據這種新的設計思想自行研製了buaa碰摩聲發射檢測儀並對此作了介紹 -
In the decision, the commission called on the united nations system to undertake periodic assessments of the sustainable development, management, protection and use of freshwater resources and to provide a global report of the state of freshwater resources and potential problems
委員會在該決定中吁請聯合國系統對淡水資源的可持續開發、管理、保護和利用進行定期評估，並提供一份關于淡水資源狀況和潛在問題的全球報告。 -
A variational difference method for obtaining the periodic solutions of n - body type hamiltonian systems with singular potential was provided. by this difference scheme, infinitely many periodic solutions can be found
摘要給出一種求解具有奇異勢能n體問題周期解的新差分格式，利用這種差分格式可以得到無窮多個周期解，並通過一個具體算例說明了方法的有效性。 -
Study on electron ' s momentum under translational transformation in periodic potential
周期勢場中電子在平移變換下的動量研究
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