نتایج جستجو برای: stabilization model
تعداد نتایج: 2148374 فیلتر نتایج به سال:
The stabilization of atoms in the presence of very intense and short laser pulses has been proposed and confirmed in various numerical simulations (e.g. Su et al). A question was then raised by several authors (Chen and Bernstein, Krainov and Preobrazhenskii, and Geltman) concerning the possibility of producing such stabilization in a one-dimensional model atom with zero range of electron–nucle...
In this paper, the impact of the discretization techniques and the sampling time, on the finite-time stabilization of sampled-data controlled Linear Time Invariant (LTI) systems, is investigated. To stabilize the process in finite time, a discretetime feedback dead-beat controller is designed for the sampleddata system. Checkable conditions on the approximate discretetime plant model and the as...
دینامیک ماهواره، شامل دو بحث اصلی بررسی حرکت انتقالی ماهواره روی مدار و بررسی حرکت دورانی ماهواره می باشد. پایدارسازی وضعیت، ثابت نگه داشتن وضعیت ماهواره نسبت به یک دستگاه مختصات، مثل دستگاه مختصات مرجع مداری می باشد. به منظور طراحی سیستم کنترل وضعیت ماهواره، بدست آوردن مدلی مناسب برای نیروها و گشتاورهایی که از طرف محیط به ماهواره اعمال می شوند، امری اجتناب ناپذیر می باشد. اهم این گشتاورها عبار...
In the context of global warming, the problem of stabilization of the concentration of carbon in the atmosphere is widely discussed. Serious difficulties in the design of reliable stabilization strategies arise due to the uncertainty of the underlying physical model. In this paper, we suggest a pattern to construct modelrobust feedback carbon emission strategies that stabilize the atmospheric c...
chemical stabilization of heavy metals is one of the soil remediation methods based on the application amendments to reduce mobility of heavy metals. a laboratory study was conducted to investigate the influence of different kinds of amendments on cadmium (cd) stabilization in a cd-spiked soil. the amendments were municipal solid waste compost (mswc), coal fly ash (cfa), rice husk biochars prep...
Direct control of protein level enables rapid and efficient analyses of gene functions in crops. Previously, we developed the RDDK-Shield1 (Shld1) system in the model plant Arabidopsis thaliana for direct modulation of protein stabilization using a synthetic small molecule. However, it was unclear whether this system is applicable to economically important crops. In this study, we show that the...
We use the thermodynamic model introduced by Aptekar’ and Ponyatovskiy for the – transformation in cerium metal to study the properties f plutonium metal. The model describes the – transformation in Pu and explains the minimum in the melting versus pressure curves for both aterials. Ga stabilization of the -phase of Pu is explained in terms of a first order transition between the two phases. Th...
We propose a massless nonminimally coupled scalar field as a mechanism for stabilizing the size of the extradimension in the Randall-Sundrum I scenario. Without needing to introduce self interactions terms we obtain a potential for the modulus field that sets the size of the fifth dimension. The minumum of this potential yields appropriate values of the compactification scale for small values o...
Objective: The aim of this study was to compare effectiveness of stabilization exercises with maximum Isometric exercises on crossed sectional area of deep flexor muscles ,pain and disability in Chronic Neck Pain . Materials & Methods : In clinical trail study fifty patients with chronic neck pain were recruited. Subjects were randomly assigned to either a stabilization (n=25) or a maximum is...
Thermostable chitinases are useful for industrial and biotechnological applications. This paper reports the stabilization of chitinase from Serratia marcescens B4A through rational mutagenesis. Changing of Ser 390 to Ile in S. marcescens. The stabilization was enhanced through entropic stabilization by reduction of the loop length and also by increasing of the beta chain length. With this repla...
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