查询词典 conduction

Then, stability boundary is obtained through the critical condition of inductor current conduction mode of the forward converter. The nature of this instability phenomenon is analyzed and considered as border collision bifurcation, and its mechanism is further discussed.

根据Forward变换器电感电流导电模式的临界条件得到了相应的稳定性边界，并对低频不稳定现象的边界碰撞分岔本质进行分析和讨论。

The design of the leads unit, low thermal resistance and high electrical isolation heat intercept connection, stability of HTS current leads, optimum design of conduction cooled current leads is analyzed in detail.

对引线单元的结构设计、引线的导热绝缘冷却结构、稳定性等问题，以及传导冷却的铜电流引线优化设计进行了详细分析和计算。

One or more sense amplifiers for sensing the conduction current of non-volatile memory is controlled by signals that are timed by a reference sense amplifier having similar characteristics and operating conditions.

本发明提供用于感测非易失性存储器的传导电流的一个或一个以上感测放大器，其是由通过具有类似特性及操作条件的参考感测放大器而定时的信号加以控制。

In first, a new short time formula of one dimension heat conduction differential equation, based on the theory of one dimension transient method, is presented for thermophysical property measurement of wood. The result of testing on red pine and larch wood arc satisfied by new method.In succession, the relationship between heat conductivity of wood and moisture, density, porosity, temperature and grain is studied experimentally in the range from 25 to 100℃. The result shows that, the heat conductivity is in direct proportion to density. but in inverse proportion to porosity. The heat conductivity of air-dried wood increased probably linear with the temperature rising. And that heat conductivity along the grain of wood is higher than that cross the grain. The former is 1.8 or 2 times of the latter.

文中研究了25～100℃范围内，气干木材的导热系数与含水率、密度、孔隙率、温度及热流方向的关系，研究表明：木材导热系数与密度成正比关系，与孔隙率成反比关系：对于针叶材，导热系数与密度及孔隙率成线性变化关系，而对于阔叶材其变化关系近似成二次曲线；气干木材的导热系数随着温度的升高近似呈线性增加：热流平行于纹理方向的导热系数大于垂直于纹理方向的导热系数，两者的比值大约在1.8～2之间。

The defects in the inner wall of three dimensional hollow cylinder-shaped equipment are calculated by means of infrared technique and solution of inverse heat conduction, and correctness of the solution is proven.

阐述了用红外技术与求解导热反问题相结合对三维圆柱形工业设备内部缺陷进行定量计算的方法，从理论上证明了求解的可行性。

With negative suction and vibration massage, liquid medicine dipping bath can lead deep conduction of drug ion.

药液浸浴借助负压吸引和振荡按摩，达到药离子的深层导入。

In the research we will consider the property of LWAC -low heat conduction, using it on envelopes to reduce the heat conduct to building inside, and analysis the influence on different direction and windows' open ratio.

兹将针对轻质骨材混凝土本身的低热传导性之优点，用於建筑物外壳，以降低外界热能导入室内。另外配合分析建筑物在不同方位及开窗率之影响，找寻建筑最佳设计。

In accordance with the classic thermal conduction equation and the linear elastic dynamics equation, this paper analyzed the changing of material's optical and thermal physical properties under laser irradiation.

数值结果表明：材料内部的瞬态温度场分布在一个很小的局部区域，该区域存在很大的温度梯度，且分布极不均匀，材料热物理参数随温度的变化对整个瞬态温度场的影响很大。

The reactor afterheat under conditions of depressuriza-tion and loss of main heat sink would be removed away through mechanism ofpassive heat transfer by conduction, radiation and natural convection.

失冷和失压工况下，由导热、辐射和自然对流等被动传热机制能将剩余发热安全地传出反应堆。

The plasma ignition threshold of metal is got through experimental and numerical study. The vapour and plasma ignition times of the target are got based on the equation of heat conduction and cascade model. We suppose that the plasma is ignited when generations of new electrons are born in vapour generation time. The influence of temperature on the thermodynamics and optics parameters of material also have been considered in the model. The resulting theory has good agreement with the experiment and overseas report. A blade method to measure the laser spot is given in this paper with validation and error analysis. The plasma threshold of metals in atmosphere and water ambients both are diagnosed with the light deflection and piezoelectric transducer. A Q-switched pulsed Nd:YAG laser operating at infrared (1064nm), visible(532nm) and ultraviolet (355nm) wavelengths has been used. Al、Fe、Cu are used as targets and get a similar results with both method. Theoretical and experimental analyses are applied on the influence of wavelength on the threshold have been done, both of which have shown that the plasma threshold of metals decrease as the laser wavelength increases; The plasma threshold of metals are higher in water than in air and the pressure of the shock wave in water is five times higher than in air .

从热传导方程和雪崩电离机制出发，假设当电子增值210倍时，考虑了温度对材料热力学和光学参数的影响时，得到了气化和等离子体点燃的时间，利用该模型进行计算得到的结果与国内外报道及自行通过实验测得的阈值基本一致；提出了利用刀刃法测量激光光斑面积的方法，并通过实验进行了验证和误差分析；利用光偏转装置和压电换能器分别对空气和水中金属等离子体点燃阈值进行了实验诊断，激光器均为调Q－YAG激光器（波长1064nm，532nm，355nm，脉宽10ns），靶材分别为Al、Fe和Cu，两种测试方法得到的等离子体点燃阈值基本一致；本文从实验和理论计算两个方面讨论了波长对等离子体点燃阈值的影响，均得到了等离子体点燃阈值随著波长的增加而减小的结论；对空气中和水中不同环境下金属等离子体的点燃阈值进行了比较研究，得到了金属在水中的等离子体点燃阈值比空气中的大，且水中产生的冲击波的压强是空气中的5倍左右的结论。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。