查询词典 PN

This article analysis the effects of canopy structure: cultivated density and canopy thickness, canopy azimuth angle and gradient, canopy height and interline distance, canopy stretch degree, leaf area coefficient, leaf area density; fruit photosynthesis characteristics: leaf optical characteristics required, changes in law of fruit Pn's season and day; the internal and external effects of photosynthesis; light interception and distribution, the paper puts forward some exiting problems and provides direction for future research.

本文通过对影响叶幕结构的因素：栽植密度与叶幕厚度、叶幕方位角和倾斜度、叶幕高度与行间距离、叶幕开张度、叶面积系数、叶面积密度；果树的光合特性：叶片的需光特性、果树净光合速率的季节和日变化规律；影响光合作用的内、外界因子；光能的截留和分配的分析，提出研究中存在的问题，为以后的研究提供方向。

The resonance tank includes four p-n junction diode varactor pairs and a spiral inductor for each differential VCO, and a voltage- level-shift circuitry is utilized to decide proper DC levels for each pair of varactors.

此共振腔由四对PN接面式可变电容器及一个螺旋型电感所组成，并有一个电位偏移电路用来适当决定每对可变电容之偏压点。

And the pn-junction diode, the bipolar junction transistor, the metal-oxide-semiconductor capacitor, and the field-effect transistor are covered in 2nd part.

除此之外，针对现在主流的MOS器件与工艺，讨论现代MOSFET的发展趋势。

Results: The PCNA mean labelling index was 48.84％± 13.63％, and the apoptotic labelling index was12.26‰± 5.20‰. The Kaplan-Meier survival curves showed that the postoperative survival time of the patient was shorter when the tumor infiltrated to the adventitia of esophagus,with lymph node metastasis, without keratinization, PI ≥ 40％ or AI＜10‰. Using forward multivariate Cox regression analysis, only the parameters of pN category and PI could be verified as independent prognostic factors.

结果：36例手术切除的食管鳞癌组织平均PCNA表达指数(PCNAlabellingindex，PI)为48.84％±13.63％，细胞凋亡指数(apoptosisindex，AI)为12.26‰±5.20‰；PI升高与患者年龄小、分化程度低、有淋巴结转移和肿瘤进行性浸润呈正相关，而AI升高与分化程度高、角化明显呈正相关；绘制Kaplan－Meier生存曲线，发现病变侵及食管外膜、有淋巴结转移、无角化、PI≥40％或AI＜10‰的患者术后生存率明显降低；COX比例风险模型分析，发现只有淋巴结转移和PI是影响预后的独立因素。

The results showed as follows: The diurnal variations of Pn were "twin peaked" curve, and the peak value occurred at 10:00 and 16:00 or so. There was an obvious "midday depression" phenomenon under full light and middle shading (60%), while it didn't occur obviously under strong shading (80%).

结果表明：毛红椿净光合速率日进程曲线呈"双峰"型，高峰值出现在10：00和16：00，全光照和中度遮荫(60%)情况下有较明显的光合"午休"现象，而强度遮荫(80%)光合"午休"现象不明显。

Under the same light intensity, the Pn and Ci of Liquidambar formosana had increased with the elevating CO2 concentrations.

其中，当CO：浓度倍增时，青冈栋的水分利用效率明显高于甜储，青冈栋和甜储两个树种的光补偿点和光饱和点都有明显的上升，其中青冈栋的光补偿点和光饱和点分别上升了17%、25%。

Test results of EMP-steel frictional pairs showed that the wear rate h of EMP, press p andvelocity v are suited to equations separately: h =m .p n and h =a .v b.

试验证明EMP复合材料瓦与钢对磨时的磨损率h与压力p、速度v之间分别满足h=m.pn和h=a.vb关系式，给出了相应系数m、n、a、b的值；磨损率与钢试件表面粗糙度Ra之间满足h=A·RaB关系式，给出了A、B的有效范围值。

LED is the core of the P-type semiconductor and components of the N-type semiconductor chips, the P-type semiconductor and N-type semiconductor between a transition layer, called the PN junction.

发光二极管的核心部分是由 P 型半导体和 N 型半导体组成的晶片，在 P 型半导体和 N 型半导体之间有一个过渡层，称为 P-N 结。

Thousands of supporters of this controversial bill organized the count Italycounter-rally in Rome famed XXX(Piazza Navona Square.

对这个争议性议案的数千名支持者组织了反对集会在罗马有名的PN广场。

It was found that the partial pressure of Hg could influence As diffusion and Hg vacancies in epilayers assisted fast diffusion of As. The As diffusion at a lower temperature of 240℃/24～48 hrs was negligibly slow.

研究表明在低温段的240℃/24～48小时的退火中As的扩散非常有限，对样品中As的浓度分布影响不大，而在高温段380℃/16小时和440℃/30分钟退火中，As扩散较为明显，能使原来的PN突变结变缓。

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。