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耦合
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     The best results,10.7% energy resolution and 202ps time resolution(coupled withplastic),are obtained simultaneously.
     测得的晶体最好能量分辨率为10.7%,对662keVγ射线时间分辨为202ps(与plastic耦合)
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     The dynamics of lasing action via nonlinear interaction of light with boson elementary excitation is modified by an additional rate equation of pumping system which is directly coupled with the boson matter.
     在我们最近提出的光场-boson元激发耦合激光模型的基础上,通过附加一个抽运系统的速率方程(该系统直接与boson物质耦合),将原先的激光动力学加以改进,以图整个系统的运作趋于更完备的远离平衡自组织。
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     The improved Linear Combination Operator method is adopted to study the ground state of a slow moving optical polaron in N-dimensional polar crystals. The analytical expressions of the ground state energy and effective mass of a polaron, average virtual phonon number around the electron are derived for both of strong and intermediate coupling(covering weak coupling ) limits. corre-sponding numerical results are also obtained for the whole coupling region.
     本文用改进了的线性组合算符法讨论N维极性晶体中的慢速运动光学极化子.在强耦合和中间耦合(含弱耦合)极限下,导出了极化子的基态能量、有效质量以及围绕电子的平均虚声子数.在普适耦合范围内,给出了相应的数值计算结果.
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     According to the inherent frequency of the vibration circuit and the variation of the resonance state (the energy coupling) between the konwn electromagnetic waves, thus the variation of water content ratio would directly affects the variation of the output voltages, Therefore the water content ratio in crude can be metered by the variation value of the output voltages.
     利用该探头来调谐振荡电路的振荡频率,根据振荡电路的固有频率和已知电磁波之间的谐振状态(能量耦合)的变化,实现了输出电压受被测原油含水率的调变,由此可测量出原油的含水率。
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     There search shows that the water pollution of capacity district is serious with coupling negative couping of the low value of the richness index and the high value of the lack index or the lack index or the seasonal variety index, on the contrary, the water pollution is not is not serious.
     结果表明,丰裕度指教的低值与紧缺度指数和季节变差系数的高值相耦合(即负耦合)的容量区内,河流水质污染严重; 相反,则水质污染比较轻微。
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     The Electromagnetic Pulse Coupling Through Apertures
     电磁脉冲孔耦合
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     Development of Coupled Wheelsets
     耦合轮对的发展
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  coupling)
In this paper, a new numerical method, the coupling method of spherical harmonic function spectral and finite elements, for a unsteady transport equation is discussed, and the error analysis of this scheme is proved.
      
In this paper, a new preparation method of 3,5-dinitrobenzoyl-bonded silica gel stationary phase (DNB) for HPLC was developed by using N-(β-aminoethyl)-γ-aminopropyl-methyldimethoxy silane as coupling reagent.
      
A series of fluorene-alt-benzene based conjugated main chain polymers chemically attached with alkyl side chains of different lengths on phenylene rings were designed and synthesized by a palladium catalyzed Suzuki coupling reaction.
      
A poly(vinyl alcohol) hydrogel was prepared by coupling poly(vinyl alcohol) with epichlorohydrin as the cross-linking agent.
      
Proteins could be directly immobilized onto these nanoparticles by a simple coupling process without losing their biological activities.
      
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Analysis of the low frequency response of automatic balancing D-C amplifier with mechanical chopper is illustrated by a typical circuit in this paper. The analysis of dynamic response of the modulation and the demodulation circuits and the auxiliary carrier wave amplifier have been considered more in details. The analysis is based on solving difference equations since the intrinsic working process behaved by the M-D M circuits using mechanical chopper is more accurately described by difference equation other...

Analysis of the low frequency response of automatic balancing D-C amplifier with mechanical chopper is illustrated by a typical circuit in this paper. The analysis of dynamic response of the modulation and the demodulation circuits and the auxiliary carrier wave amplifier have been considered more in details. The analysis is based on solving difference equations since the intrinsic working process behaved by the M-D M circuits using mechanical chopper is more accurately described by difference equation other than by differential equations.

本文結合一个典型线路对带有机械振子的自动稳零直流放大器的低頻特性,进行了分析,并且着重分析了調制解調輔助放大器对緩变信号的频率响应。所用方法是差分方程求解法,因为用差分方程来描述具有机械振子的調制解調线路的固有工作过程,要比用相同的初始条件的微分方程来描述更为准确。文中推导出調制及解調綫路的調制系数k_M、解調系数k_(ДM)以及它們的传递函数。此外,对放大調制波的阻容耦合放大器也进行了分析。分析結果說明,如果放大器耦合迴路的参数选择得合理吋,則此放大器对緩变信号的調制波可作为理想放大器来处理。文中所得結果可作为設計該类型放大器时选择参数的参考。此外,本文对于采用自动稳零直流放大器作运算放大器时可能产生的持續低頻自激振蕩問題,也进行了討論。

The coupling between elastic and magnetic phenomena in ferro-magnetic materials often gives rise to internal friction. In previous studies on magnetoelastic internal frictions, the applied magnetic field was mostly static. In the present experiment, nickel specimen was made to vibrate in torsion under an alternating magnetic field, and a pronounced internal friction peak was observed when internal friction was plotted as a function of the alternating magnetic field strength. This peak did not appear under similar...

The coupling between elastic and magnetic phenomena in ferro-magnetic materials often gives rise to internal friction. In previous studies on magnetoelastic internal frictions, the applied magnetic field was mostly static. In the present experiment, nickel specimen was made to vibrate in torsion under an alternating magnetic field, and a pronounced internal friction peak was observed when internal friction was plotted as a function of the alternating magnetic field strength. This peak did not appear under similar conditions when using a static magnetic field. The position of the peak was shifted toward the side of a higher magnetic field when the nickel specimen was either cold-worked or contained carbon; and it was shifted toward the side of a lower magnetic field when the specimen was previously annealed at an elevated temperature. The height of the peak was considerably raised with an increase of vibrating frequency.

在铁磁性物质中,弹性现象与磁性现象之间的耦合每每引起内耗。过去作磁弹性内耗研究所用的磁场大都是静磁场。我们令镍试样在交变磁场中作扭转振动,测量内耗。把内耗表示为磁场强度的函数时,得到一个显著的内耗峰。这个内耗峰在静磁场下不出现。把镍试样经过冷加工处理或在试样中加碳,都足以把内耗峰的位置移向高磁场强度的一边,而保温退火则把内耗峰移向低磁场强度的一边。此外,这个内耗峰的高度由于所用扭转频率的增加而显著地增加。 根据镍的磁化曲线上各部分所相当的可逆及不可逆过程,可以定性地解释上述内耗峰的来源及其所受各种因素的影响。

The acoustic internal friction of iron vibrating transversely in a steady magnetic held was measured by means of Rochelle salt (NaKC_4H_4O_6 ·4H_2O) crystal plates, the frequency of vibration used was 1633 cycles/sec. When the strength of the magnetizing field is lower than 40-50 oersteds, the curve showing the dependence of internal friction on magnetic field strength is almost flat, and becomes steeper for a higher field strength. However, as the field intensity exceeds 150 oersteds or so, the change of internal...

The acoustic internal friction of iron vibrating transversely in a steady magnetic held was measured by means of Rochelle salt (NaKC_4H_4O_6 ·4H_2O) crystal plates, the frequency of vibration used was 1633 cycles/sec. When the strength of the magnetizing field is lower than 40-50 oersteds, the curve showing the dependence of internal friction on magnetic field strength is almost flat, and becomes steeper for a higher field strength. However, as the field intensity exceeds 150 oersteds or so, the change of internal friction with field strength becomes slower again, and finally approaches to a maximum value. This maximum value of internal friction does not decrease under a saturation magnetic field. Such a phenomenon has not been observed before.

用罗谢耳盐(NaKC_4H_4O_6·4H_2O)压电晶片测量铁在稳定磁场中作横振动时的内耗,所用的振动频率是1633周/秒。当磁场强度小於40—50奥时,内耗随着磁场强度而变化的曲线几乎是平的,其后则变化较快,在超过约150奥时,内耗的变化又渐越平缓,最后达到一个差不多恒定的最大值。这个内耗最大值在饱和磁场强度下并不降低,这种现象是以前所没有观察到的。 根据初步的分析,认为所观察到的内耗舆铁磁性物质在磁场中作横振动时磁畴的磁化向量的转动有密切关系。铁中的磁畴的磁化向量由於试样的弯曲而随着转向,但是外加磁场的作用却要使它们转(冂巳)到舆磁场方向一致。通过磁致伸缩的作用,磁畴的转动引起试样的附加应变。这种磁性现象舆弹性现象之间的耦合过程需要一定的时间,因而造成一种应变落后於应力的情况,在周期性应力的作用下便引起内耗。

 
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