查询词典 PN

A new frequency estimation algorithm for Time Domain Synchronization OEDM system is proposed, which utilizes the time domain circular characteristic of PN sequences to adjust frequency offset and then uses a variable step frequency scan scheme to estimate large frequency offset.

提出一种新的适用于TDS-OFDM系统的频偏估计算法，利用PN序列的时域循环特性进行预频偏调整，然后用变步长扫频进行大频偏的估计，定时同步之后再利用PN的时域循环特性进行细偏估计。

Diurnal peaks in Pn for three age shoots of jack pine and black spruce occurred in the early morning between 7∶00-8∶00 on sunny days. The maximal rates of Pn and gs were 7.5 μmol.m-2.s-1 and 0.11 mol.m-2.s-1 for 1-year-old shoots of jack pine and 6.1 μmol.m-2.s-1 and 0.11 mol.m-2.s-1 for 1-year-old shoots of blackspruce.

而短叶松和黑云杉3个不同年龄树枝的Pn和gs的高峰出现在早晨7∶00到8∶00，其值分别是短叶松一年龄树枝为7.5 μmol.m-2.s-1和0.11 mol.m-2.s-1，黑云杉一年龄树枝6.1 μmol.m-2.s-1和0.11 mol.

Results showed that the diurnal changes in Pn of the species in different periods were similar and could be expressed as two-hump curves, reflecting a significant middy depression. The decrease in Pn during midday was mainly resulted from non-stomatal limitation in July, but stomatal limitation occurred in August and September. High temperature and low relative humidity were critical factors constraining Pn in July.

结果表明，不同时期防风净光合速率日变化均呈双峰型曲线，具有明显的光合"午休"现象。7月份防风光合速率中午降低主要由非气孔限制引起，8月份、9月份防风光合速率中午降低则主要由气孔限制引起，7月份高温低湿是限制防风Pn的主要环境因子。

In chapter five, the base band signal process of CDMA base station simulator system is introduced, including channel coding and decoding, interleave and disinterleave, PN sequence generator, orthogonal spread spectrum and quadrature Spreading, scrambling code, power control, digital forming filter, the capture and track of PN code, dispreading and demodulation, etc. Some FPGA design graphic and waveform simulation of base band transmitter module is given and realization algorithm of base band receiver is discussed in detail.

第五章介绍了CDMA基站仿真系统的基带信号处理过程，包括信道编译码、交织与去交织、PN码发生器、正交扩频与四相扩频、扰码、功率控制、数字成形滤波器、PN码的捕获与跟踪、解扩与解调等，并给出了基带发射机模块的部分FPGA设计原理图和波形仿真，详细论述了基带接收机模块的实现算法。

The response of Pn to instantaneous lighfflecksdepended on induction state and lightfleck length;full induction shoots could response morerapidly than low or non-induction shoots;and the increase of lightfleck length could raise photoinduction thus to increase Pn.

针叶Pn对单个瞬时光斑的响应与光斑前的光诱导状态和光斑时间长短有关，充分诱导的针叶Pn光斑的响应要敏捷得多，光斑时间延长可提高光诱导状态。

F. pumila had the strongest capacity to adhere to walls, and it formed a quite good covering landscape by means of a large quantity of adventitious roots. Furthermore, it was tolerant to shade, and the effects of shading on its growth and landscape covering were very small. P. heterophylla had the rapidest growth and covering speed, and it adhered to walls by adhesive discs, but was defoliated in winter or after a long period of shading. The other three vines climbed walls using adventitious roots, and their adhering capacities were all relatively poor. However, E. fortunei still formed a relatively good covering due to its rapid growth and emerald leaf colour. After shading for four months, leaves of F, pumila, C. grandiflora, and P. serpens became thin, and accordingly their leaf weight per unit area significantly decreased. Shading also reduced chlorophyll contents of C. grandiflora and E. fortunei but enhanced those of F. pumila and P. serpens, It did not influence leaf thickness, leaf weight or chlorophyll content of P. heterophylla. Whether shaded or not, the relationship between Pn and PAR for each species could be expressed as y=alnx+b, and furthermore there was a significant (P.01) correlation between them. Pn and LCP values for all five lianas also significant (P.01) correlated. Shading reduced LCP values of P. heterophylla, C. grandiflora and E. fortunei but increased LSP of F. pumila.

结果表明，1薛荔对墙体附着力最强，它依靠大量的不定根吸固在墙体上，形成很好的覆盖效果，而且薜荔耐荫，遮光对其生长与覆盖的影响很小；爬墙虎的生长与覆盖速度最快，它主要依靠吸盘吸固墙壁，但在冬季或长时间遮光后出现明显落叶现象，影响其覆盖景观；其他3种都依靠不定根沿墙面攀援，附着力相对较差，但扶芳藤由于生长较快，叶色终年保持翠绿，也能形成相对较好的覆盖效果；2遮光4个月后，薛荔、凌霄和蔓九节的叶片变薄，相应地这3种植物单位面积的叶片重量都显著减轻；遮光还使凌霄和扶芳藤的叶绿素含量减少，使薛荔和蔓九节的增加，但对爬墙虎的叶片厚度、叶重和叶绿素含量都不产生明显影响；3无论遮光与否，5种植物的Pn与PAR之间的关系都可用y=alnx+b表示，并且都达极显著相关，Pn与光补偿点之间亦呈极显著相关；遮光还使爬墙虎、凌霄和扶芳藤的LCP下降，并使薛荔的光饱和点升高。

The diurnal variation curves of Pn among different types of pear cultivars are different, and there are two types, single-apex curve and anisomerous double-apex curve.

不同类型梨品种叶片Pn日变化曲线不同，有单峰型和不对称双峰型两类，新鸭梨及黄冠Pn曲线呈单峰型，清香、红巴梨和库尔勒香梨的Pn日变化曲线为双峰型

The results showed that the photosynthesis of Melinis minutiflora varied in a double-peak pattern with a remarkable noon inhibition and being controlled by stoma. The first peak appeared around 10:00 am while the Pn reached 18.8 molCO2/(m^2s) and the second peak appeared around 14:00 pm while the Pn reached 14.4 molCO2/(m^2s), and changed positively with the variation of transpiration rate and stomatal conductance.

结果表明，糖蜜草的光合日变化呈双峰型，有明显的&午休&现象且受气孔调节。10：00出现第1个峰值，Pn为18.8μmol/，14：00左右出现第2个峰值，Pn为14.4μmol/，变化趋势与蒸腾速率、气孔导度等因子相同。

In PN group, the light microscopic findings included inflammation cells infiltration and hepatic steatosis, and electron microscopy showed vacuole change in cytosol and rarefactive microvillus in micro-bile duct. Conclusion PN-associated liver dysfunction was related with hepatocyte oxidative injury and apoptosis.

PN肝脏损伤机制可能是PN某些配方成分应用中，脂质过氧化导致肝细胞氧化损伤，同时损伤线粒体膜，促使线粒体膜通透性增加，释放细胞色素C等凋亡相关因子，激发caspase-3等级联反应，产生肝细胞凋亡，导致肝损伤。

The Pn remarkedly reduced, but the Jf didn't change significantly when PAR decreased, which showed that the needed PAR of maximal Pn was bigger than that of Jf.

PAR的降低明显的降低了Pn，而对Jf无明显影响，可见Pn比Jf达最大值时所需的PAR大。

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。