本底

低本底~（14）C年龄测定的自动数据获取和处理

Low Background Radiocarbon Dating Data Automatic Acquisition and processing

X射线出现电势谱的本底分析

Analyses of the background in X-ray appearance potential spectrum

R值测量中束流相关本底的扣除方法

Subtraction of Beam-Associated Background in R Measurement

对在R矩阵分析中如何确定本底、道半径和边界条件等问题予以讨论。

Some viewes of determining the background , channel radius and boundary conditions are given .

在线~（14）C年龄测定系统不但能测量~（14）C计数，而且能测出~（14）C能谱和有较低的本底计数率。

The radioactivity of ( 14 ) ~ C and its β spectrum can be measured in low count-rate background .

以苯酚为代表物质，探讨了不同pH、不同本底等条件下高锰酸钾预氧化对粉末活性炭吸附水中微量有机污染物的影响规律。

The influence of potassium permanganate preoxidation on the adsorption of phenol by powdered activated carbon was evaluated .

利用北京谱仪R值扫描数据，研究了束流相关本底的特征及其扣除方法。

Using R scan data collected at BES ⅱ detector , we study the character of beam associated background .

~（226）Raγ源本底中子研究

Research on Background Neutron of ￣ ( 226 ) Ra γ Source

瓦里关大气本底观象台CO2、CH4观测过程的质量控制

Quality control of CO2 and CH4 measurement data on China Global Atmosphere Watch baseline Observatory

军用规格的PC板很好的实现组件的位置和通道，使这种设计具有最低的本底噪声有史以来建造。

Mil spec PC board well implemented components location & lanes makes this design having the lowest noise floor ever built .

Nd全流程本底为5&7×10~（-11）克。

The total chemical blank for Nd is 5 - 7 × 10 ~ ( - 11 ) g.

中国4个国家级野外站大气CH4本底浓度变化特征

Characteristics of Atmospheric CH_4 Concentration Variations at Four National Baseline Observatories in China

低本底液体闪烁计数法测量环境样品中~（90）Sr

Direct Determination ot 90 ~ Sr in Environmental Samples by Ultra Low-Level Liquid Scintillation Counting

TM影像在陕北地区生态环境本底调查中的应用

Base situation investigation of ecological environment in North Shaanxi Province with the data of TM images

用~（99m）Tc－过锝酸盐甲状腺／本底比值快速诊断甲状腺功能亢进

Rapid diagnosis of hyperthyroidism with 30min ￣( 99m ) Tc pertechnetate thyroid uptake ratio

中微子探测器的低本底gamma测量和探测器探测效率刻度

Low background gamma ray measurement of the neutrino detector and detection efficient calibration of gamma ray detector

大气悬浮颗粒PM（10）对感烟火灾探测器本底效应研究

The Base Smoke Density of Smoke Fire Detector Created by the Suspended Particulate PM_ ( 10 ) in Atmosphere

伴随粒子法测量T（d，n）~4He中子源注量率中的本底处理

Background Analysis for an Associated Particle Method to Measure the Neutron Fluence Rate From the T ( d , n ) ~ ( 4 ) He Neutron Source

根据多普勒效应，中性束中的氢粒子发出的Hα波长偏离本底的Hα波长，波长偏移量与氢粒子的能量相关，从而在光谱仪上得到多峰Hα谱线。

According to the Doppler effect , the multi-peak H_ α spectra is obtained , which are emitted by the neutral beam and separated from the unshifted H_ α .

热释电摄像管本底补偿技术在烧结氧化中Se气氛对真空微电子平板摄像管CdSe靶面性能的影响

Pedestal Compensation Technique of Pyroelectric Vidicon Effect of Se Source Temperature on Performances of CdSe Target in VME-FPC

~（99m）Tc甲状腺/颈本底校正比在甲状腺疾病中应用价值的探讨

Exploration of the value of ~ ( 99m ) Tc thyroid / neck background rectified ratio in thyroid disease

在B积分值大于0.5的情况下，本底宽度和B积分值近似成线性关系。

A Talk on the Background When the B-integral ranges from 0.5 to 2 , an approximate linear formulation can be used to describe the relationship between the pre-pulse duration and the B-integral value .

实验表明，计数器固有本底为0.002计数/（min·Cm~2）（2计数/min）。

It has been shown that the intrinsic radioactive background of the apparatus is 0 . 002 cpm / cm2 ( 2 count / min ) .

曾作为炼锌场地后改为耕地的土壤镉、锌含量高于其他耕地本底值（P0.05）。

The contents of cadmium in the soil of arable land which were artisanal zinc-smelting area before is higher than the other arable land ( P0.05 ) .

利用全球定位系统（GPS）测定电子浓度总含量（TEC），必须考虑GPS卫星和GPS接收机的本底的影响（即硬件延迟、频偏）。

For determining the ionospheric total electron content with the Global Positioning System ( GPS ), the instrumental biases in GPS satellites and receivers must be removed .

本文采用MATLAB编程为低本底反康普顿高纯锗γ谱仪这样精确的多道脉冲幅度分析器提供了数据处理能力，很好的补充了它的缺陷。

This paper offer data processing ability for low background ant-compton HPGe γ instrument that is accurate multi-channel amplitude analyzer by adopting MATLAB program , and well complement it 's disfigurement .

BEPCⅡ束流相关本底的蒙特卡罗模拟研究（Ⅱ）&束流-气体相互作用

Monte Carlo Simulation of the BEPC ⅱ / BES ⅲ Backgrounds & Beam-Gas Interactions

高效率低本底HPGeγ谱仪和点源刻度

High Efficiency and Low Background HPGe γ - spectrometer and Calibration of Point Source Efficiency

针对毫米波辐射计的增益漂移和本底噪声的变化，本文提出采用PC计算机实现增益自动控制和本底噪声自动补偿技术。

In view of gain shift and background noise change of millimeter wave radiometer , this paper presents a method to automatically control its gain and compensation voltage of background noise with PC computer .

采用多元逐步判别分析模型，在本底资料的基础上，建立CAS中医辨证计量诊断的判别函数式。

Based on the background data , a discriminatory function formula for quantitative TCM differential diagnosis was established by using the multivariate stepwise analysis model .