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As an application we produce complete hyperbolic 5manifolds that are nontrivial plane bundles over closed hyperbolic 3manifolds and conformally flat 4manifolds that are nontrivial circle bundles over closed hyperbolic 3manifolds.


As an application of the results we prove a generalization of Chevalley's restriction theorem for the classical Lie algebras.


The proof is an application of a recent result by W.


The application arises because of a very strong homological property enjoyed by certain cell filtrations forqpermutation modules.


We give as an application a family of singular Schubert varieties.

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 This article introduces a new circuit of wide band squarewave generator, producing squarewaves from 15 Hz to 1.2 MHz in seven steps, with rise time, of about 0.04 μs., the highest out putsignal level being13.5 v. peak to peak.Finally, some experimental examples of squarewave application are given.  本文介绍一个矩形波发生器的新电路,可以产生七种不同频率(由15赫至1.2兆赫)的矩形电压,建立时间约0.04微秒,轮出的最大振幅达13.5伏。后面还提出一些应用矩形电压的实验范例。  The modern sampling oscillograph has got extended application in electronic and physical laboratories. In the conventional system the bandwidth increases as the duration of gating pulses decreases. On the other hand, however, it is preferable to have gating pulses of longer duration from the antiinterference point of view. It is proposed in this paper to employ low frequency equalizing network for the correction of the frequency response which is deteriorated in the sampling process if the gating pulse... The modern sampling oscillograph has got extended application in electronic and physical laboratories. In the conventional system the bandwidth increases as the duration of gating pulses decreases. On the other hand, however, it is preferable to have gating pulses of longer duration from the antiinterference point of view. It is proposed in this paper to employ low frequency equalizing network for the correction of the frequency response which is deteriorated in the sampling process if the gating pulse is not narrow enough. This has been proved theoretically and experimentally in this paper. In the experimental model, both rectangle and triangle gating pulses are tested. The results indicate that for certain desired bandwidth, much longer duration of the gating pulses may be used than is required in conventional sampling oscillographic system.  本文利用取样显示系统具有很大频谱压缩的特点,在低频域用网络对系统频率特性进行校正。从而在不减窄选通脉冲宽度的情况下达到扩展通频带的目的。文中介绍了两种低频实验模型,其中分别采用矩形及三角形脉冲作为选通脉冲。模型的通频带为2兆赫,校正网络在1千赫以下实现。  In this paper a group of sequencss wtih a δfunction autocorrelation are defined as the complementarytype sequences.Six kieds of sequences are presented and compared, and then it is shown that the basic form among them is the complementary series, and the others can be derived or generalized from it.The progresses of signal processing techniques have now led to a successful development of the complementary series phase reversal coded pulse compression radars, which have a low range sidelobe level within a narrow... In this paper a group of sequencss wtih a δfunction autocorrelation are defined as the complementarytype sequences.Six kieds of sequences are presented and compared, and then it is shown that the basic form among them is the complementary series, and the others can be derived or generalized from it.The progresses of signal processing techniques have now led to a successful development of the complementary series phase reversal coded pulse compression radars, which have a low range sidelobe level within a narrow doppler spread range. A pair of the complementary series can be isolated from each other via timesharing, frequency sharing, etc. The optimal pairs of complementary series and the optimal series should be selected according to the sidelobe level of the ambiguity function that is as low as possible.It had been demonstrated that the compleimntary series formed by concatenating, interleaving and mating, provide some radio navigation systems, such as LoranC, with the possibilities of supressing the sky wave interference, automatic searching, recognizing and tracking.The complementary series also find its applications in the acoustic surface, wave transducer coding and the infrared spectrometry.  本文定义自相关为δ函数的一大类序列为互补型序列,介绍了六种序列,指出互补型序列的基本形式是互补序列,而其他序列都可由互补序列导出或推广而来。 当前由于信号处理技术的进展,能在较窄多普勒范围内得到低距离旁瓣的互补序列倒相编码脉冲压缩雷达已经问世。这种雷达可以用时分、频分等方法隔离序列,最佳互补序列对和最佳序列应该选择模糊函数的旁瓣为最低的。 曾证明过,如Loranc这样的无线电导航系统,采用按链接、插接、取伴偶步骤构成的互补序列,能够具有抑制天波干扰,自动搜索、识别和跟踪的能力。 互补序列在声表面波换能器编码和红外线光谱测定中也有应用。   << 更多相关文摘 
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