计数率

在100～2000keV能区，相对效率为38.4%的HPGe探测器积分本底计数率为0.7／s，本底效率比为1.82／s；

In this system , the background counting rate is 0.7/s and background efficiency ratio is 1.82/s for HPGe detector of 38.4 % relative efficiency in 100 ~ 2 000 keV energy range .

介绍了几种可以提高ECT闪烁探测系统计数率性能的前放电路设计，包括延迟线斩波法（DLC）、动态积分法（DIM）和脉冲堆积防止法（PPM），并给出了它们的性能比较。

This paper introduced some front end electronic circuit designs that can improve the counting rate performance of scintillation ECT system , including : delay line pulse clipping method , dynamic integration method and pile up prevention method . Finally , the comparison of their performance was presented .

探测器单元PAD的单道计数率和strippattern的研究

The Study on the Single Rate of Detector Unit PAD and the Strip Pattern

具有高计数率性能的ECT闪烁探测器前端电路

High Counting Rate Front End Electronic Circuits for Scintillation ECT System

研究了电子探针测定玻璃粉末样品时，粒度、压片压力与X射线计数率之间的关系。

The relationship of X ray counting intensity with particle size and pressure on sample briquet were studied for electron probemicroanalysis ( EPMA ) of powdered glass .

推导了m个随机信号中有k个发生偶然符合的计数率计算公式，并结合实例说明了其应用。

The formula to compute the accidental coincidence rate for k signals among the m random signals has been deduced and the method to use the formula is demonstrated .

对能量计数率进行小波系数分解，进一步计算得到各尺度的Lipschitz指数α。

Through wavelet coefficient decomposition of energy count rate and further calculation obtaining various Lipschitz index α .

用体表~（24）Naγ计数率评价事故中子照射注量与剂量的实验研究

Experimental research on the application of ~ ( 24 ) Na γ counting rates on the body surface after nuclear accident for assessing neutron fluence and dosage

未镀导电膜试样的NaKαX射线计数率较高，且出现起伏。

For the samples without conductive coating , the counting rates of NaK_ α X-ray were higher and appeared fluctuating .

测量每小块能区的分辨率（FWHM）、计数率和峰位走动。

The resolution ( FWHM ), the count rate and the peak walk were measured for every small region .

针对多元素共存、计数率低等谱分析困难，采用人工神经网络方法对所测X荧光谱进行学习和识别。

Aiming at the difficulties in spectrum analysis of the multi-element co-existence samples and in low count rates , the method of artificial neural network ( ANN ) was adopted to learn and identify the X-fluorescence spectra of samples .

HCC-9204细胞中未见明显的Bcl-2阳性信号，Bax阳性细胞计数率为43.2%。

There was no detectable Bcl 2 positive signal , and the counting rate of Bax positive cells was 43.2 % in HCC 9204 cells .

用BF3正比计数器测量了由W和D2O产生的光中子计数率。

Using the BF3 proportion counter , we measured the count rate of the photoneutron produced by W and D2O .

将1个高计数率符合中子计数器改装为有源井型符合中子计数器装置，测量由Am－Li中子源发射的中子诱发物料中的235U裂变时产生的裂变中子，以确定物料中235U含量。

The high level neutron coincidence counter is modified into an active well neutron coincidence counter using two Am Li neutron sources .

水平井气水或油气两相流动状态下GHT伽马计数率与液量呈近似线性变化关系；

At gas-water or oil-gas two-phase flow in the horizontal wells , the GHT count rate and liquid quantity have approximate linear relationship .

得到了疲劳裂纹扩展过程中的AE计数率、能量变化率、裂纹扩展率与应力强度因子的关系，通过这些关系式可预测叶片的疲劳寿命。

The correlations of the crack growth rates , AE count rates and AE energy changed rates versus the stress intensity factor ( SIF ) range were obtained . The fatigue life can be predicted by the correlations .

研究了在任意Th、U含量和Th-U比覆盖整个范围（即0≤Th/U≤∝）时总α计数率对年剂量的转换因子及其误差。

The annual dose conversion factors of gross a count rate and their errors for arbitrary Th and U contents and the Th / U weight ratio covering the entire range 0 ≤ Th / U ≤∞ were calculated .

在火球模型下，我们详细地推导了Gamma射线暴计数率的公式，其中膨胀火球面的多普勒效应是考虑的主要因素。

We derive in a much detail the formula of count rates , in terms of the integral of time , of gamma-ray bursts in the framework of fireballs , where the Doppler effect of the expanding fireball surface is the key factor to be concerned .

仿真结果证明设计方案可行，最小道宽小至1us，最高计数率可达100MHz。

The simulating results prove that this scheme can design this system with the narrowest channel-width 1 u s and the highest frequency 100 MHz .

研究了一种容积为75ml的高灵敏的闪烁室，其探测效率～82%，本底计数率～0.09计数/min。

A high-sensitive scintillation chamber of 75 ml in volume with detection efficiency ~ 82 % and background counting rate ~ 0.09 cpm has been developed .

结果符合计数率足够时，衰减校正（AC）和非衰减校正（NOAC）均能见到≥11mm的球体，AC的靶/本底（T/B）比值小于NOAC，大结节的T/B值比小结节高。

Results When the coincidence count rate was adequate , the Camera could depict nodules larger than spheres with a diameter of 11 mm with attenuation correction ( AC ) or non attenuation correction ( NOAC ) .

结论对于裂变中子照射，在事故后利用头顶部位测量到的24Naγ初始计数率及Bm值可在几小时内估算出个人受照射的中子注量和剂量。

Conclusions Following an accident , the original counting rate of 24 Na γ at the top of head and B m , value of an individual receiving neutron fluences and neutron dose from nuclear fission can be used to estimate neutrons within a few hours .

介绍了利用PND测井资料进行气层识别的方法，即利用近探测器计数率和远探测器计数率以一定比例进行重叠的方法识别气层。

The method for recognizing gas zone with PND logging data is introduced , which is to overlap the counting rates of a near detector and a far one to recognize gas zone based on certain scale .

通过对不同电阻率RPC的探测效率、计数率和暗电流的实验比较，给出电阻率与BPC性能的定性关系和适用于BESⅢμ探测器高性能RPC的优化电阻率范围。

By the compare of Detection Efficiency , Counting Rate , Dark Current of eight RPCs with different resistivity , the qualitative relations between resistivity and RPC performances are gained . The optimized resistivity range for BES ⅲ muon detector running environment and RPC quality control is also offered .

显像前，首先测量满针筒注射器的放射性计数率，即静脉注射前Tc-99m-DTPA的放射性总计数率。

Imaging before the first measurement of needle syringe full of radioactive count rate , that is , before the Tc-99m-DTPA intravenous injection of radioactive total counts .

电子学测试表明该插件能够响应最小脉宽为2ns的脉冲输入，最高计数率达到170MHz，定时精度为100ns。

The module has been tested , the test results present that its minimum input pulse-width is 2 ns , the maximum counting rate is 170 MHz and the timing precision is 100 ns .

用强源干扰找到了HPGeγ谱仪系统百分死时间与计数率丢失校正因子的关系，使该系统允许计数率大大提高，从而解决了放射性定量测量中的一些困难。

The relation between the percent deadtime and the correction of counting rate losses for HPGe γ spectrometer system was found by using a strong γ source . Therefore , the activity measurement can be implemented at relatively high count rate , with this γ spectrometer .

采用高计数率符合中子计数器测量材料中的240Pu等核素自发裂变产生的裂变中子，通过计算等效240Pu量来确定材料中的总含Pu量。

The coincidence count of the spontaneous neutron of even mass Pu isotope was measured with a high level neutron coincidence counter . The total Pu in material is calculated out in term of the effective 240 Pu mass and Pu isotope composition .

结果32P胶体瘤体间质注射后其放射性计数率明显高于其他器官组织，器官组织放射性计数率瘤体给药明显低于尾静脉给药。

Results After intratumoral administration of P-32 colloids , the radioactive counts per minute in the tumor were obviously higher than those in other tissues or organs , and the radioactive counts per minute of other tissues or organs were evidently lower than those after caudal vein administration .

分析了空气簇射阵列触发计数率的气象效应；

The meteorological influences on trigger rate of ASA are analysed .