查询词典 PN

The airgun signal was detected all along the line of the largest offset equal to 185 km, seismic phases Pg, Pc, P2, PmP and Pn have been picked successfully, based on which 1-D forward modeling of deep crustal structure has been conducted and the low-velocity layer of crust-mantle transition zone has been discussed.

在185km长的测线上均记录到了气枪信号，成功检测到Pg，Pc，P2，PmP和Pn等多组震相，并在此基础上对地下深地壳结构进行了一维速度结构正演，讨论了该区域壳幔过渡带的低速结构。

One channel of the DS-QPSK signal could be simplified by the high correlation orthogonality of PN code, and then phase error detection was implemented through the reference of detecting phase error for BPSK signal with arc tangent function.

PN码具有很好的相关特性，可以简化DS-QPSK信号中的一路信号，进而借鉴二相相移键控信号的反正切鉴相方式完成鉴相。

The first chapter gives the summary of basic theories of EOS for solids, including often-used thermodynamic theories and phenomenological expressions during the study progress of EOS along with the finite strain theory. Furthermore, from the view of solid-state theory the general expression of EOS of solids P =Pc+Pn is given, and the microcosmic mechanism of compression for solids, i.e., the interactive potential energy between atomics, is also analyzed, subsequently several different forms of cold energies and pressures are derived.

第一章，给出了物态方程的基本理论概要，总结了EOS研究中最常用的热力学理论和唯象关系式以及有限应变理论，并从固体理论角度给出了固体物态方程的一般形式P =Pc+Pn，分析了固体压缩的微观机理——原子间相互作用势，由此导出了几种不同形式的冷能和冷压。

Under no andheavy soil water stress, there"s a great change of Atriplex canescens"s physiologicalindexes, Tr and Cs increased while Pn, WUE and LS decreased, its growth andbiomass reduced substantially, which reveals it can hardly survive under extremelydry habitat.

在无土壤水分胁迫和重度土壤水分胁迫下各项生理指标变化显著，Tr、Cs增加和Pn、WUE、LS下降，生长量和生物量的大幅度下降，表明其在特别干旱的环境条件下难易生存。

Carboxylation efficiency and leaf temperature is the main ecophysiological factors that effect Pn.

结论］羧化效率、叶面温度是影响Pn的主导生理生态因子。

This paper analyzed the firstorder statistics of receive data′s sequences and deduced a channel estimation algorithm using the property of circulant Toeplitz matrix when using PN sequences as training sequences.

从接收信号的一阶统计量入手，并且在训练序列为PN序列下，利用循环To-eplitz矩阵的特性，得到了信道估计的算法。

1 The sealing surface connecting the body flange can adopt the planar type for valves with PN≤2.5MPa; and convexo-concave, tongue

4.2.1 与阀体法兰连接的密封面型式，公称压力PN≤2.5MPa的阀门，可采用平面式；其他压力级应为凸凹式、榫槽式或梯形槽等型式，并在

First of all, this paper selected a wide range of spectral response, short response time, photoelectric conversion efficiency, pn junction area of silicon photovoltaic cells, as the light meters photoelectric conversion of the probe, and it creates a separate probe light and increase to the filter and cosine amended, and separated from the fuselage, better adapted to the cosine law and improve the measurement accuracy and scope.

首先，本文选用了光谱响应范围宽，响应时间短，光电转换效率高、pn结面积大的硅光电池作为光照度计的光电转换的探头，并把它做成一个单独的光探头，并加了以v滤光器和余弦修正器，与机身分离，更加适应余弦定律，提高了测量的精度和范围。

4During chilling stress,Ca~(2+)treatment could delay the decrease of chlorophyll content and RuBPCase activity;And it could enhance Pn,Gs,Tr,the saturation point and dark respiratory speed of the heat-shock-induced cucmber seedings.So it reduced Ci.But the EGTA treatment had the opposite effect.

4钙处理能减缓热激黄瓜幼苗冷胁迫下叶绿素含量和RuBPCase活性下降，提高Pn、Gs、Tr、光补偿点和暗呼吸速率，降低Ci；而EGTA处理则相反。

The diurnal variations of Pn and Gs in upper layers of canopy, compared with the model predictions, showed a good general agreement.

结果表明在不同的有效光合辐射、温度、湿度和CO2浓度下Pn的观测值和模拟值非常吻合，树冠上层叶片Pn和Gs日变化的实测值和模拟值也基本一致。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。