نتایج جستجو برای: اغتشاش j2
تعداد نتایج: 3739 فیلتر نتایج به سال:
This study aimed to evaluate strains of the entomopathogenic fungus Purpureocillium lilacinum (PL) and bacterium Bacillus thuringiensis (BT) from Sarawak for their in vitro nematicidal properties against different developmental stages Meloidogyne incognita (MI). Ten indigenous novel PL, a strain (PLM), BT carrying Cry6 Cry14 gene sequences were screened MI females, eggs, egg hatching 2nd ...
این مقاله به بررسی یک ساختار جدید برای رویتگر اغتشاش ارتباطی در سیستم کارکرد از دور میپردازد. در سیستمهای دارای تاخیر ناشناخته، حفظ پایداری سیستم با استفاده از رویتگر اغتشاش امکان پذیر میباشد. از آنجا که این روش به مدل تاخیر زمانی نیازی ندارد، میتواند برای سیستمهای کارکرد از دور که دارای کانال ارتباطی با تاخیر زمانی متغیر با زمان هستند، به کار گرفته شود. بنابراین، در این مقاله ابتدا به برر...
We study the dynamics of the relative motion of satellites in the gravitational field of the Earth, including the effects of the bulge of the Earth (the J2 effect). Using Routh reduction and dynamical systems ideas, a method is found that locates orbits such that the cluster of satellites remains close with very little dispersing, even with no controls. The use of controls in the context of thi...
Using the density matrix renormalization group and a bosonization approach, we study a spin-1/2 antiferromagnetic Heisenberg chain with near-neighbor coupling J1 and frustrating second-neighbor coupling J2, particularly in the limit J2 >> J1. This system exhibits both dimerization and incommensurate spiral spin correlations. We argue that this system is closely related to a doped, spin-gapped p...
and Applied Analysis 3 It can be easily seen that for a compact convex set C, y is in NC x if and only if S y | C xy, or equivalently, x is in ∂S y | C . Definition 2.2. A functional F : X × X × R → R where X ⊆ R is sublinear with respect to the third variable if for all x, u ∈ X ×X, i F x, u; a1 a2 ≤ F x, u; a1 F x, u; a2 for all a1, a2 ∈ R, ii F x, u;αa αF x, u; a , for all α ∈ R and for all ...
نقش قارچ ها در کنترل نماتدهای انگل گیاهی به طور وسیع مورد مطالعه قرار گرفته است. در این پژوهش، اثر آنتاگونیستی قارچ هایpaecilomyces lilacinus و isaria farinosa روی نماتد ریشه گرهی meloidogyne javanica در شرایط آزمایشگاهی و گلخانه ای مورد بررسی واقع شد. با استفاده از نقوش کوتیکولی انتهای بدن ماده، مشخصات جوان سن دوم (j2) و استفاده از آغازگرهای اختصاصی، نماتد مورد شناسایی قرار گرفت. جدایه های قار...
For a (classically) integrable quantum-mechanical system with two degrees of freedom, the functional dependence H=HQ(J1,J2) of the Hamiltonian operator on the action operators is analyzed and compared with the corresponding functional relationship H(p1,q1;p2,q2)=HC(J1,J2) in the classical limit of that system. The former converges toward the latter in some asymptotic regime associated with the ...
By applying the theory of slowly rotating stars to the Sun, the solar quadrupole and octopole moments J2 and J4 were computed using a solar model obtained from CESAM stellar evolution code (Morel (1997)) combined with a recent model of solar differential rotation deduced from helioseismology (Corbard et al. (2002)). This model takes into account a near-surface radial gradient of rotation which ...
F. Jaeger has shown that up to a ± sign the evaluation at ( j, j2) of the Tutte polynomial of a ternary matroid can be expressed in terms of the dimension of the bicycle space of a representation over G F(3). We give a short algebraic proof of this result, which moreover yields the exact value of ±, a problem left open in Jaeger’s paper. It follows that the computation of t( j, j2) is of polyno...
Transformed roots of the susceptible potato Solanum tuberosum L. cv. Desiree were inoculated with second-stage juveniles (J2) of Globodera rostochiensis pathotype Rol. Adult males emerged after 3-4 weeks and matings with females occurred. After 8 weeks gentle pressure on the eggs of maturing females released the J2 which were viable. Because this technique enables the production of vigorously g...
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