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LD's leading product line of intelligent industrial control instruments for temperature, humidity, pressure, flow, level, acidity and other parameters automatically detect, display, Totalizer and control, in the metallurgical, chemical, light industry, food, Pharmaceutical, oil refining, electric power and other industries to be widely used, its excellent cost performance has increasingly come under the favor of all walks of life.

公司的主导产品LD系列智能型工业控制仪表，用于温度、湿度、压力、流量、液位、酸碱度等参数的自动检测、显示、积算及控制，在治金、化工、轻工、食品、制药、炼油、电力等行业中得以广泛使用，其优良的性能价格比日益受到各行各业的青睐。

Based on the optoelectronics theory, the experiment device is designed, which is composed of pulse generator, LD light source, 1×3DQ, adjustable CTB, testing optic fiber, intervening light filters, fast micro-light watt-meter and data analysis system. The technology of optic fiber Raman scattering is analyzed for its application to temperature testing of railway engineering.

根据光电子理论，设计由脉冲发生器、LD光源、1×3路双工器、可控恒温槽、光纤、干涉型波分复用器、快速微光功率计和数据采集分析系统组成的实验装置，进行光纤喇曼散射技术用于铁道工程构筑物温度的监测研究。

Because the traditional wireless microphone uses the frequency low silent chain, all is analyzes the radio-frequency signal the intensity, therefore they cannot and need the noise the signal differentiates; In the noisy radio frequency environment (for example digital equipment and so on CD/VCD/LD send out massive overtones) under use, when this launcher signal weak or closure, the silent chain possibly can open suddenly, the receiver can send out the intense demolition noise.

传统无线麦克风因采用频率低的静噪电路，都是分析射频信号的强度，所以它们不能把噪音和需要的信号区分开来；在嘈杂的射频环境(如CD/VCD/LD等数码设备散发出的大量谐波)下使用，在该发射器的信号微弱或关闭时，静噪电路可能会忽然打开，接收机就会发出强烈的爆破噪声。

LD and SOD are detected each by enzymic method, xanthine oxidase method.

LD检测采用酶法，SOD检测采用黄嘌呤氧化酶法。

The beam quality of a LD pumped Nd∶YAG laser is measured with CCD camera system. The background characteristics of the CCD system and the influence of the size of integral box upon measurement results are investigated. The following conclusions can be derived form experimental results:(1) Background is strongly depend upon exposure time and pixel binning,while temperature has an ignorable effect upon it,whether with or without ambient light.(2) A 5%-cut is the minimum value in order to get a reasonable result.

采用CCD系统实验测量了LD泵浦Nd∶YAG激光器的光束质量参数，研究了CCD系统的背景噪声特性和积分区域选取对光束质量参数测量的影响，从实验数据中得到以下结论：（1）在有、无背景光两种条件下，背景记数强烈地依赖于曝光时间和像素的合并，温度影响可以忽略不计，（2）为获得M2合理的测量结果，至少要选择5%积分区域。

Using a 200 μm-core multimode optical fiber as the phase conjugator mirror, an LD-pumped Q-switched four-pass MOPA system operated on 100 Hz repetition rate and 20 ns pulse width has been experimental investigated in this paper.

报道了利用多模光纤作为相位共轭镜应用于重复频率100 Hz，脉宽20 ns的电光调Q四通放大LD抽运激光器的实验研究。

Short peptide LD-1,a novel antifungal peptide,was extracted form the roots of Cynanchum komarovii.

短肽LD-1是从牛心朴子草根中新分离的具有抗菌活性的多肽。

Short peptide LD-1, a novel antifungal peptide, was extracted form Cynanchum komarovii.

短肽LD-1是从牛心朴子草中新分离的具有抗菌活性的多肽。

By using ABCD law, considering laser medium as lenslike medium , we analyzed a four-mirror folded cavity used for LD side-pumped Nd:YAG laser was analyzed, especially discussed the relationship between the fundamental mode radius or fundamental mode volume and the pumped power in the laser medium.

运用ABCD传输矩阵理论，把增益介质作为类透镜处理，对LD侧面泵浦地Nd：YAG激光器四镜折叠腔进行了分析，特别讨论了增益介质内部基模光斑半径和基模体积随泵浦功率变化的关系。

Grounding on the purpose of industrialization of laser, based on the thought of astigmatism compensation and thermal stability of the cavity, we employed high power LD to pump Nd:YVO4 crystal and used the introcavity frequency doubling with type 1 noncritical phase-match LBO crystal, which has high damage threshold. The cavity parameters are optimized by the use of ABCD theory and the resonatorstructure CAD software.

立足于激光器的产品化，基于谐振腔的像散补偿和热稳定性的设计思想，采用大功率LD单端泵浦Nd：YVO_4晶体，具有高光损伤阈值的Ⅰ类非临界相位匹配LBO晶体腔内倍频方案，应用ABCD定律和腔结构模拟软件CDA设计并优化了一组腔参数。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。