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F-22相关的网络例句
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When F is an algebraically closed field char F≠2, A is similar over F to an orthogonal matrix if and only if ( 1 ) the invariant factors of A aer self-reciprocal (2) the elementary divi sors of A of the form x...

ii当F为一个代数闭域且char≠2时,F相似于一个正交矩阵的充要条件为(1)A的不变因子是自反的。(2)A的形为(X±1)~(2k)的初等因子出现偶数次。

According to Sarkovskii's theorem, if the continuous self-map f of the closed interval has a 3-periodic orbit, then f must has an n-periodic orbit for any positive integer n But f can not has all n-periodic orbits for some n.

但f不可能有所有类型的n-周期轨。例如:则f仅有两种类型的3-周期轨中的一类。这表明Sarkovskii定理远远没有给出周期轨之间的关系的全部信息。

LetJbe a continuous map of a unit square into itself and f can be descendent. This paperpresents slecific featrue for f with homochinic points.

设f是可降的二维自映射,本文给出了这类自映射有异状点的特征──存在f的链回归点,但不是周期点,并且f的队极限点集与周期点集的交非空。

The gradient of f; its dot product with uw is the directional derivative of f in the direction of w

f f 的梯度;它与 uw 的内积为 f 在 w 方向上的方向导数

Let f be a solution of the higher order differential equation, a sufficient condition for f belonging to the weighted Dirichlet space D or to the Bergman space L, respectively, is obtained.

设f是高阶微分方程的解,得到了f分别属于加权Dirichlet空间D和Bergman空间L的一个充分条件,并得到了f是不可容许解的一个充分条件。

For a heterogeneous elastic solid consisting of two homogeneous layers, three homogeneous layers whose shear wave velocities increasing with depth, or three homogeneous layers whose interlayer has high velocity, if there are multi-mode dispersion curves, the phase velocity V〓 of the first mode will close up to the Rayleigh wave velocity of the bottom layer when frequency f→OHz, and V〓 of the first mode will close up to the Rayleigh wave velocity of the top layer when f→∞.

由多导波模式的相速度频散曲线还可知,对于二层固体介质、结构层的横波速度随深度而递增的三层固体介质、含硬夹层的三层固体介质而言,若频率f→OHz,其基阶模式的瑞利波相速度V〓→V〓(V〓为最底层介质的瑞利波速度);若f→∞,其基阶模式的V〓→V〓(V〓为最上层介质的瑞利波速度);因此,随着频率f逐渐升高,野外实测的瑞利波相速度V〓曲线应该主要为基阶导波模式。

Therefore the dispersion curves obtained in the field are primarily consisted of the first mode. For a heterogeneous elastic solid consisting of three homogeneous layers whose interlayer has low velocity, the phase velocity V〓 of the first mode will also close up to the Rayleigh wave velocity of the bottom layer when frequency f→OHz, but V〓 of the first mode will close up to the shear wave velocity of the interlayer when f→∞, and there is a cut-off frequency at high frequency region for the first mode and V〓 close up to the compressional velocity of interlayer when interlayer is liquid.

当三层固体介质中存在软夹层时,若f→OHz,则其基阶模式的相速度V〓→V〓(V〓为最底层介质的瑞利波速度);若f→∞,其基阶模式V〓→V〓(V〓为中间层介质的横波速度);若三层介质中存在液体夹层,当f→OHz时,基阶模式V〓→V〓,而基阶模式在高频段存在一个截止频率,截止频率处的瑞利波速度V〓→V〓;由此可判定,野外实测的相速度频散曲线不仅有基阶导波模式,同时还应有高阶导波模式波的存在,接收信号中存在模式间的跳跃,因此频散曲线会产生"之"字形现象。

By means of experim ents of marker transfer,acridine orange sensitivity test,F' curring and mini-chr omosome transformation it is concluded that the F' plasmid is always in an integ rated state in the SIn strains and that the initiation of the replication of the bacterial chromosome is carried on by the integrated F' plasmid.

标记转移、吖啶橙敏感性、F′质粒消除和mini-染色体质粒转化等实验说明,Sin菌株中F′质粒始终处于整合状态,并且在40℃中细菌染色体的复制由整合状态的F′质粒所带动。

The method is as follows that the two ends of a nanometer are fixed on two pivots and an axial micro-pulling force T is applied on the nanometer; an electrode is arranged on the middle part of the side of the nanometer and an alternate voltage is applied on the electrode to motivate the nanometer to generate resonance, and therefore, the natural frequency f of the nanometer is measured and acquired; according to the material characteristics and the geometry characteristics of the nanometer as well as the boundary condition of the nanometer material, the relation between the natural frequency and the axial pulling force of the nanometer, namely the f-t curves of the nanometer, can be calculated by a vibration equation; according to the measured natural frequency f, the size of the micro-pulling force T can be acquired.

该方法将一根纳米材料的两端固定在两个支点上,给纳米材料施加一个轴向的微小拉力T;在纳米材料的侧面,位于该纳米材料的中部放置一个电极,在电极上施加一个交变的电压激励纳米材料使其发生共振,测得纳米材料的固有频率f;根据纳米材料的材料特性和几何特征以及纳米材料的边界条件,由振动方程计算出该纳米材料的固有频率与所受的轴向拉力的关系,即纳米材料的f-T曲线;根据上述测得的固有频率f,得到微小拉力T的大小。

On CHE programming, the higher coupling ratio of control-gate makes the higher electrical field across TOX in Si than Ge. Also because of the continuity of displacement vector, the higher permittivity of Ge would cause the lower electrical field at interface. We get the higher gate current in Si than Ge. On CFN programming, the higher CT in Ge would show the higher electrical field across TOX. However, the parameters of F-N tunneling are calculated and showing the gate current in Si is larger than Ge. On the same mechanism of F-N tunneling erasing, the parameters also show the higher electrical filed of Si would cause the higher erasing speed. The continuity of displacement vector also explains the higher electrical field at interface for F-N tunneling programming/erasing.

从通道热电子穿隧写入的模拟结果发现,由於控制闸极耦合电容的影响,加上电位移向量在半导体-氧化层界面连续的观念,拥有较高介电常数的锗反而得到较小的等效电场,决定了穿隧电流反倒是不如矽基板;在F-N穿隧写入的模拟中,即便锗基板拥有较大的总耦合电容,使得在浮闸的耦合电压大於矽基板,但仍旧是半导体-氧化层界面的电场扮演了穿隧电流的决定性因素,得到的结果仍旧是矽基板的写入速度高於锗基板;在F-N抹除的模拟中,运用与F-N写入相同的数学模型,仍旧看见在锗基板上未能得到速度上的改善,同时用数学的计算展示了合理的解释。

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歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车,和一双合并为一移交&整个lotta爱&。

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