Variation of the Observed Widths of La I Lines with the Energy of the Upper Excited Levels, Demonstrated on Previously Unknown Energy Levels

We performed systematic laser spectroscopic investigations of La I spectral lines, using optogalvanic detection. Sixteen previously unknown even parity levels, having energies between 40,300 and 44,300 cm-1, are reported. These levels classify altogether 67 lines, not listed in spectral tables. The new levels were found due to the observation of the depopulation of the lower levels of the excited transitions. We found a remarkable variation of the observed widths of single hyperfine structure components dependent on the energy of the upper excited levels. Some levels having energies higher than 43,000 cm-1 appear to have a very high ionization probability.

基于Rife-Vincent(Ⅰ)窗的电力谐波分析方法

快速傅里叶变换(FFT)的电力谐波分析方法应用最多,但存在频谱泄漏和栅栏现象,影响谐波分析的精确度。为解决这个问题,先分析了常用窗函数和插值算法,后提出了基于5项Rife-Vincent(Ⅰ)窗六谱线插值的谐波分析方法。通过多项式曲线拟合,推导出幅值、相位和频率的修正公式,并用于仿真验证。仿真结果证明了算法的有效性和准确性:在分析简单信号时,与Hanning窗、Hamming窗、Blackman窗相比,5项Rife-Vincent(Ⅰ)窗的检测精度更高,幅值和相位相对误差分别小于8.94×10^(-6)%和2.60×10^(-4)%,基波频率相对误差低至-1.44×10^(-8)%;在分析包含间谐波的复杂信号时,所提出的算法相比其他算法计算精度更高。

I-Line光刻胶材料的研究进展

酚醛树脂-重氮萘醌正型光刻胶由于其优异的光刻性能,在g-line(436nm)、i-line(365nm)光刻中被广泛使用.g-line光刻胶胶、i-line光刻胶,两者虽然都是用线型酚醛树脂做成膜树脂,重氮萘醌型酯化物作感光剂,但当曝光波长从g-line发展到i-line时,为适应对应的曝光波长以及对高分辨率的追求,酚醛树脂及感光剂的微观结构均有变化.在i-line光刻胶中,酚醛树脂的邻-邻′相连程度高,感光剂酯化度高,重氮萘醌基团间的间距远.溶解促进剂是i-line光刻胶的一个重要组分,本文对其也进行了介绍.

逆转录转座子LINE-1与肿瘤的发生和发展

LINE-1是现今人体内存在的唯一具有自主转座活性的转座子,约有500 000个拷贝,占人类基因组总量的17%。LINE-1是通过转录和逆转录在内的转座过程产生新的DNA拷贝,并使新产生的DNA拷贝插入基因组的不同位置。LINE-1转座会影响基因组中其他基因的表达或调控,因而会对基因组的稳定性产生影响,从而导致基因疾病或肿瘤的发生。本文总结了近年来国际上对LINE-1转座与肿瘤的发生和发展之间关系的研究进展,为肿瘤的治疗和机制研究提供一些线索。

EXACT SOLUTIONS OF NEAR CRACK LINE FIELDS FOR MODE I CRACK UNDER PLANE STRESS CONDITION IN AN ELASTIC－PERFECTLY PLASTIC SOLID

The near crack line analysis method has been used in the present paper,The classical small scale yielding conditions have been completely abandoned in the analyses and one inappropriate matching condition used to be used at the elasticplastic boundary has been corrected.The reasonable solution of the plastic stresses near the crack line region has been established.By matching the plastic stresses with the exact elastic stresses at the elastic-plastic boundary,the plastic stresses the length of the plastic zone and the unit normal vector of the elastic-plastic boundary near the crock line region have been obtained for a mode I crack under uniaxial tension,as well as a mode I crack under biaxial tension,which shows that for both conditions the plastic stress componentsσy, and σsy.he length of the plastic zone and the unit normal vector of the elastic-plastic boundary are quite the same while the plastic stress σs is different.

Spectrometric Measurement of Plasma Parameters Utilizing the Target Ambient Gas O I &N I Atomic Lines in LIBS Experiment

In this article, we shall report the results of the spectroscopic measurements of the plasma parameters utilizing the spectral lines emitted from the air atoms surrounding plasma (O I line at 777.19 nm and N I at 746.83 nm). The plasma was created via irradiation of plane solid aluminum target in open air by a high peak power Nd: YAG laser pulses at fundamental wavelength of 1064 nm. The emission spectra were recorded using Echelle type spectrograph in conjunction with a time gated ICCD camera at different delay time from 1 to 5 μs and at a fixed gate time of 1 μs. The plasma electron density was measured utilizing the Stark broadening of the N I and O I lines and then compared to the reference density as deduced from the optically thin Hα-line at 656.27 nm appeared in the same emission spectra. The results show that under our experimental conditions the air lines are subjected to moderate absorption. The plasma electron temperature was measured utilizing the relative spectral intensity of the air (O I to N I) lines after correcting their spectral radiance against absorption. The standard temperature was measured utilizing the Al II ionic lines. A comparison to the reference temperatures shows a very close agreement after correcting the emission spectral radiance of the air lines against self absorption, which emphasizes the importance of correction process.

Test on Wilt-Resistance of Simple Hybrides F7 and Beckross Hybrid Lines F6 B1 of <i>G. hirsutum</i>L. of Cotton to New Virulent Isolates of Fungus <i>Fusarium verticillioides</i>and <i>Verticillium dahliae</i>

The article presents the results of studies on the resistance of hybrid cotton lines to a new virulent isolate (strain) of the fungus Fusarium verticillioides upon inoculation of the host plant. Based on the studies, it was found that the complex genotypic resistance of the studied lines, when the host plants are inoculated with isolates of -100 V. dahliae Kleb fungus and 103 Fusarium verticillioides fungi, depends on the degree of resistance of the parental forms and their combination ability.

基于西门子S7-200控制器PPI通信的自动化生产线装置程序设计

以亚龙YL-335B自动生产线装置为研究对象,分析数据交换地址规划、通信端口设置、网络读写向导配置和PLC程序编写方法等,以供同行业人员参考。使用分布式I/O编程方法,PLC程序在主站编写,主站读取各个从站的DI信号,并写入各个从站D0信号,各个从站不需要编写PLC程序,方便PLC程序的编写和调试。

Preliminary Phenotypic and SNP-Based Molecular Characterization of Maize (<i>Zea mays</i>L.)-Mexicana (<i>Zea mays</i>SSP. <i>Mexicana</i>) Introgression Lines under Inbred Background of 48-2

Wild relatives possess potential genetic diversity for maize (Zea mays L.) improvement. Characterization of maize-mexicana introgression lines (ILs) is of great value to diversify the genetic base and improve the maize germplasm. Four maize-mexicana IL generations, i.e. BC1, BC2, BC3, and RIL, were constructed under the elite inbred background of 48-2, elite inbred line that is widely used in maize breeding in Southwestern China, and were phenotyped in different years and genotyped with 56110 SNPs. The results indicated that 48-2 had higher phenotypic performances than all the characterized ILs on most of the agronomic traits. Compared with other ILs, BC2 individuals exhibited more similar performance to 48-2 on most traits and possessed the highest kernel ratio (66.5%). Population structure and principal component analysis indicated that BC3 individuals gathered closer to 48-2 and exhibited the lowest mexicana-introgression frequency (0.50%), while BC2 (29.06%) and RIL (18.52%) showed higher introgression frequency. The high level of genetic diversity observed in the maize-mexicana ILs demonstrated that Z. mays ssp. mexicana can serve as a potential source for the enrichment of maize germplasm.

智能变电站电容型设备介质损耗在线监测IED设计

为了及时有效地对设备绝缘特性进行在线监测从而保障电网安全运行,笔者提出了一种基于ARM+DSP双CPU结构的智能变电站电容型设备介质损耗在线监测系统IED设计方案,遵循IEC 61850协议给出具体软硬件设计。运行结果表明:该系统可以精确的测得泄漏电流、介质损耗、等值电容等设备运行状态信息,并可通过IEC 61850协议将数据传输至在线监测数据中心。

基于IEC61850的牵引变电站线路保护IED设计

依据IEC61850系列标准,建立了牵引变电站线路保护智能电子装置(IED)的对象模型;在IED功能配置的基础上,对逻辑节点进行了划分,实现了逻辑节点向IED的分配,将各逻辑节点映射到相应具体电路;采用ARM处理器设计了通信管理主板,采用DSP处理器设计了保护主板,还设计了输入、输出信号变换电路等各电路模块。在通信管理ARM主板上,以Linux-2.4.18-14内核为基础,经过适当内核优化、系统裁减,移植了集成有完整TCP/IP协议栈的嵌入式Linux操作系统。该设计为符合IEC61850标准的新型IED构建软、硬件平台,为IED的实现奠定了基础。

重楼皂苷I对高转移人卵巢癌细胞体外生长抑制功能的研究

目的:研究重楼提取的活性成分重楼皂苷I对高转移人卵巢癌细胞的体外生长抑制及促凋亡功能,并初步探讨其可能的作用机制。方法:用CCK8法检测不同浓度重楼皂苷I在不同时间点对高转移人卵巢癌细胞(HO-8910PM)体外增殖的影响;光镜下观察细胞形态的变化;用流式细胞术(FCM)检测经不同浓度重楼皂苷I处理后高转移人卵巢癌细胞的细胞周期变化;用AnnexinV/PI双染法、Hoechst33258检测不同浓度重楼皂苷I诱导细胞凋亡的发生。结果:重楼皂苷I在0.5～5μg/mL浓度范围对HO-8910PM细胞的增殖均有明显抑制作用,并呈现明显的剂量-时间依赖性。其半数抑制浓度在24h到120h范围内基本集中在1～3.5μg/mL之间;重楼皂苷I主要影响HO-8910PM细胞的DNA合成前期(G0/G1);重楼皂苷I浓度控制在2μg/mL以内,早期即3h开始就能诱导HO-8910PM细胞的凋亡,作用时间越长,凋亡发生率越高。结论:重楼皂苷I能抑制卵巢癌细胞的增殖并诱导其凋亡,从而发挥抗肿瘤作用。

一种新型i-线化学增幅型光致抗蚀剂材料的制备及性质

将具有高酸解活性的酯缩醛聚合物与重氮萘醌磺酸酯配合,组成正性化学增幅型光致抗蚀剂,用于高感度化学增幅型i-线(365nm)光致抗蚀剂.实验结果表明:在酸的作用下,该类聚合物可分解为小分子片段;与传统的光致抗蚀剂体系相比,该体系用稀碱水显影时具有更高的溶解速率,且可进一步提高感度,可制作线宽小于0.5μm的图像.

基于PSO-LIBSVM的广域后备保护新算法

广域后备保护利用电网线路IED和母线IED采集各元件相关信息,构造基于PSO-LIBSVM的线路和母线故障识别网络。以IED采集的信息作为输入向量,建立故障识别网络的训练样本矩阵;PSO算法寻找最优LIBSVM运行参数并训练故障识别网络,利用随机故障下的测试样本矩阵对线路和母线识别网络进行测试,以识别电网故障元件IED,进而确定故障元件。通过大量实验仿真了多种信息不准确情况下的故障识别,实验证明基于PSO-LIBSVM的广域后备保护新算法,识别准确率高,具有很好的容错性。

基于IEC61850的高压线路间隔的建模研究

根据IEC61850标准利用面向对象的基本思想,概括IEC61850的技术特点及其在线路间隔建模中的体现。深入介绍了标准中核心部分的关系,分析了怎样对高压线路间隔建立遵循IEC61850标准的装置模型、内部数据对象模型,探讨了遵循IEC61850标准的建模的过程步骤,给出一些逻辑节点的建模实例。

亚微米i线和g线投影光刻物镜研制

本文介绍了分步重复投影光刻机的i线和g线投影光刻物镜主要技术指标、设计要点、研制中解决的关键单元技术和设计试制结果。结果表明数值孔径NA＝0．42i线和NA＝0．45g线、视场15×15mm以及畸变＜±0．1μm的五倍缩小投影光刻物镜研制成功。

i线光学光刻技术及其发展潜力

综述和分析了ｉ线光学光刻技术的现状和发展。指出结合移相掩模技术和离轴照明技术，可在确保焦深的基础上大幅度提高成像分辨率。

0.7微米i线分步重复投影光刻曝光系统研制

本文介绍0．7μm线分步重复投影光刻曝光系统的技术指标、系统设计、研制中解决的关键单元技术和研制结果。结果表明工作波长365nm，缩少倍率5倍．曝光视场15mm×15mm．光刻工作分辨力0．6μm，并具有双路暗场同轴对准．又能精确分步投影光刻的曝光系统已研制成功。

基于深度强化学习算法的双边装配线第一类平衡

针对传统优化算法求解双边装配线第一类平衡问题时不能有效利用历史求解经验,难以得到最优解,提出一种深度强化学习求解算法CNN-PPO。设计了CNN-PPO强化学习智能体结构,在近端策略优化算法基础上,引入卷积神经网络增强智能体的数据特征提取能力;根据双边装配线问题特征,定义状态矩阵对双边装配线问题进行描述,并引入标记层辅助智能体进行任务决策;根据问题优化目标设计了奖励函数,结合强化学习在线执行—评价机制,为每次决策选择最优的待分配任务,并通过多个案例测试验证了算法的有效性和稳定性。实验结果表明,所提方法的求解结果具有优越性,59个测试案例中有57个可以达到下界。

PL2101电力线载波芯片I^2C通信的实现

简要地介绍了电力线载波芯片PL2101、I2C串行通信的基本原理以及两者之间通信与程序的实现。