Study on optical spectrum of radio-intermediate flat-spectrum quasars;
中等强度射电平谱类星体的光学光谱研究
Using a sample from FIRST Bright Quasar Survey, we separated radio-intermediate flat-spectrum quasars from traditional radio-loud quasars, and compared their optical spectral properties to radio-quiet and radio-loud quasars.
本文采用FIRST亮类星体巡天(FIRST Bright Quasar Survey)的一个样本,从传统分类中的射电噪类星体中分离出中等强度射电平谱类星体,并对他们以及射电宁静和射电噪类星体的光学光谱进行了比较研究,发现中等强度射电平谱类星体有与射电宁静类星体类似的光学光谱。
THE PREPARATION OF TEM SPECIMEN FOR THE NANOMATERIAL DETECTION;
纳米材料检测中透射电镜样品的制备
Application of EBSD and TEM techniques in characterization of deformation microstructure of single crystal aluminum;
背散射电子衍射与透射电镜在单晶铝形变组织研究中的应用
IN SITU TEM STUDY ON HYDROGEN-INDUCED CRACKING OF NICKEL;
纯Ni中氢致开裂的透射电镜原位观察
Grown-in oxygen precipitates in czochralski silicon investigated by transmission electron microscopy;
直拉硅单晶中原生氧沉淀的透射电镜研究
Scanning and transmission electron microscopy observation on the ultrastructure of Bartonella generation Ⅰ and Ⅱ;
巴尔通体Ⅰ、Ⅱ代扫描透射电镜观察
Observation of the ganglion of Ascidian Styela clava with transmission electron microscopy;
柄海鞘神经节的透射电镜观察
Observation on collagen of myocardial interstitium in rats by transmission electron microscope;
透射电镜观察缺血再灌注对大鼠心脏胶原的影响
Discussion on method of employing transmission electron microscope(TEM)to observe particles medication agents;
透射电镜观测微粒给药制剂方法探讨
Atmospheric TSP was figured by transmission electron microscope.
以大气总悬浮颗粒物为主要研究对象,用透射电镜观察其形貌,污染特征明显;用火焰原子吸收法测定其水溶性常规元素K、Na、Ca和Mg。
To investigate the effects of co-contamination of bensulfuron methyl and cadmium on rice at cellular and molecular levels, transmission electron microscope (TEM), scanning electron microscope (SEM) and comet assay were used.
以粤香占和丰美占两种水稻为指示植物,通过透射电镜、扫描电镜以及彗星实验,在根尖细胞超微结构和DNA分子水平上研究了重金属元素Cd、苄嘧磺隆(Bensulfuron Methyl,BSM)复合污染对水稻的毒理学机制。
The transmission electron microscope (TEM) was used to measure morphological structure of the powders.
利用X-射线衍射测定 其结构,通过透射电镜测量其形貌。
Generally considering about the thermophysical performance parameters of the material and the heat reservoir of the laser,a rational numbered model of the laser remelted jet electroforming was build up by using finite element analysis software of ANSYS.
利用ANSYS有限元软件,综合考虑材料的热物理性能参数、激光的热源模型,建立了激光重熔喷射电镀层的数值模型。
In this paper, the nanocrystalline nickel coating whose electrical source inevitably are direct and pulse current was made by jet electroforming, then remelted the coating in order to eliminate the limitations.
本文在分析纳米晶材料的优异性能的基础上,采用直流和脉冲喷射电镀方法制备了纳米晶镍镀层,再针对喷射镀层的不足,对镀层进行激光重熔,通过选择优化的重熔工艺参数,细化镀层晶粒,提高镀层的致密性,增强镀层与金属基体的结合强度。
Research on numerical controlled system of jet electroforming machine;
数控喷射电铸机床数控系统的研究
This paper introduces the system components and the theory of jet electroforming integrated with rapid prototyping.
介绍了喷射电铸快速成型技术的原理与系统组成 ,通过实验研究与分析了喷射电铸的特点 ,用喷射电铸快速成型设备制备了具有简单形状的纳米晶金属铜零件 。
Improvement on the transmitting circuits of 1609 acoustic logging tool;
1609补偿声波测井仪发射电路的改进
Optic-electric transmission system typically consists of transmitting circuit, fiber and receiving circuit.
光电传输系统一般由发射电路、光纤和接收电路三部分组成,根据信号调制和解调方式的不同,在电力系统测量中可将光电传输系统分为调幅方式、压频(V/F)转换方式和模数(A/D)转换方式三种。
The ultrasonic transmitting circuits consist of sine wave generators,power amplifiers and some compensation circuits.
介绍了超声波参量换能器的工作原理,设计了一种声学参量换能器结构、超声波发射电路和声波接收电路。
The results of study show that the temperature, pressure and voltage can exercise an influence on emission current to various degrees.
研究结果表明 ,温度、压力、电压对发射电流均有不同程度的影响 ,在高温 (>80 0℃ )条件下 ,由阴极材料热发射所获得的电流密度 ,比通过电晕方式所得到的电流密度至少高一个数量级。
A new method is presented for measurement of internal pressure of vacuum interrupters,having no use of magnetic fields but using decay velocity of emission current.
提出了一种无需施加磁场、利用发射电流衰减速度测量真空开关灭弧室真空度的新方法。
The effect of various factors on the thermal emission current is observed,the thermal emission characteristics of the cathode are significantly dependent on temperature,pressure and voltage added between anode and cathode.
研究结果表明 ,温度、压力、电压对发射电流均有不同程度的影响。