The approach uses a pulsed semiconductor lasers, a low-noise and low-temperature receiver with a PIN diode detector and FET transimpedance amplifier together, and means of digital-averaging and digital-filtering signal processing, to reduce the receiver`s noise to a minimum. It uses a Y type fiber distributor to reduce the reflection form the front of tested fiber too. By enhancing the receiver s sensitivity and signal-noise ratio we can enlarge the dynamic range of PC-OTDR greatly.
采用脉冲半导体激光器组件，低噪声、低温PIN-FET组件，使用数字平均结合数字滤波的信号处理方法，最大限度地抑制接收机的噪声；用Y型光纤分路器，降低前端反射，提高接收机的灵敏度和信噪比，使PC-OTDR获得大动态范围。
This type of equipment stability, range wide, and the detection of low threshold, high resolution, high sensitivity.
该型仪器稳定性好，测量范围宽，检出下限低，分辨率高，灵敏度高。
Compared with the conventional hydrogen analyzer which has measurement error resulting from the different components of standard gas and sample gas, this detector has many characteristics such as wide gas range, wide linear range of measurement, high sensitivity, without special requirements for the accuracy of sampling volume etc.
克服了常规氢分析仪由于标准气和样品气气体组成不同而引起的测量误差，仪器具有适应气体范围广，测量线性范围宽，灵敏度高，对进样体积的准确性无要求等优点。
Furthermore, the hybrid optimal strategy is introduced and improved: introducing sensitivity to guide the searching course, in order to reduce the blindness of search; coding based on range of value corresponding equipment operation, to avoid invalid search; adopting variable cross over and mutation rate, to adapt it to the requirement of the searching progress; making dynamic variation of searching population, to ensure the optimization quality while accelerate the searching course; adopting the membership degree of fuzzy logic to objective function, to take into account the load status and to realize the counter voltage adjustment.
采用的混合优化算法并进行了如下改进：引入灵敏度指导优化进程，减少搜索的盲目性；根据不同设备的调节范围，采用不同二进制长度进行编码，以减少无效搜索；采用可变交叉、变异率，以适应搜索进程的需要；种群大小根据搜索进程动态改变，在保证搜索质量的同时提高速度；在目标函数中引入模糊逻辑中的隶属度来计及负荷的轻重，以实现逆调压的目标等。
Extra sensitivity and range will add dollars to the cost and better filtering to reduce the number of false alerts will also add to the tally.
灵敏度和范围将增加额外的成本价和更好的过滤，以减少错误警报的同时还会相符。
This text has done a summary to PSD first, then introduce the structure, operation principle and characteristic of PSD, PSD position sensor experimental provision and measuring the circuit, study size, to enlarge size, mid point position of coefficient choose measurement range, sensitivity, non-linear influence of error in PSD circuit of luminous point emphatically.
本文先对PSD做了一个概述，然后介绍了PSD的结构、工作原理及特性，PSD位置传感器实验装置及检测电路，着重研究了光点的大小、电路的放大系数的大小、中点位置的选取对PSD的测量范围、灵敏度、非线性误差的影响。
In practice, attention should be paid to the sensitivity of the sensor and the compromise between the range.
在实际应用中，要注意传感器的灵敏度和量程之间的折中。
The main idea and scheme to achieve the goal are as the following: with intra-cavity gas sensors being placed inside the erbium-doped fiber ring laser cavity, sensitivity may be greatly improved. Also, the wide spectrum range of the Erbium-doped fiber laser covers the overtone absorption lines of a number of important gases, thus may allow for multi-gas detection within the system. In addition, wavelength modulation technology could be applied to this system to further improve its measuring sensitivity and precision.
基于掺铒光纤激光器的环腔式气体检测技术将气室置于激光谐振腔内，利用光子在腔内谐振形成激光的过程多次经过气室，大大增加了有效光程长，提高了气体检测的灵敏度；结合掺铒光纤激光器宽波长覆盖范围，可以完成多种气体的定性定量测量；并将波长调制技术应用于本系统中，进一步提高了检测灵敏度和精度。
Though the analysis of statical and dynamic characters on eddy-current sensor, it puts forward the influence factors of detective range and sensitivity and linear. On the other hand, it also makes dynamic character factor equel to two inertia system. It not only improves dynamic character but also has little influences to sensitivity by correcting with non-power circuit.
通过对涡流传感器的静态特性和动态特性的分析，指出影响传感器测量范围、灵敏度、线性度等指标的因素；推导出涡流传感器动态性能可以用两个串联的一阶惯性系统来表示，并设计出无源超前的校正电路，保证在不影响灵敏度的前提下可以大大的改善其系统的动态特性。
Accelerometers are offered in a range of sensitivities and the optimum sensitivity is dependent on the level of the signal to be measured e. g., in the case of a high g shock test, low sensitivity is desirable.
加速表的敏感度是在一定范围内的，最佳敏感度取决于所需测量的信号水平，例如，在高 g 冲击测试中，需要低敏感度。
The experimental results show that the sensitivity of center frequency-antennadistance is-1.75 ppm/cm. The results are obtained on the single-SAWR construct and adistance range about 20 cm.
试验结果表明，当采用单SAWR结构，对应约20cm的间距变化范围，获得低至-1.75ppm／cm的中心频率-间距灵敏度。
Using differential pulse volatmmetry the calibration curves for DA and AP were obtained over the range of 1 – 120 μM with good selectivity and sensitivity. The proposed method provides a simple method for selective detection of DA and AP.
使用微分脉冲伏安法可以获得DA和AP在1~120 μM的测量曲线并得知有好的选择性跟灵敏性，这个方法提供了一个简单对多巴胺和乙醯氨酚选择性研究。
Meanwhile, the high master frequency band signal acquisition channel makes full use of the cymoscope sensitivity and hardware dynamic range, has larger analog signals front-located gain, thereby reinforcing the signal-noise ratio of the high master frequency band signal, and bringing along benefits for the later stage high resolutions seismic data process.
同时由于高主频频带信号采集电路充分利用了检波器的灵敏度和硬件动态范围，具有较大的模拟信号前置增益，使得高主频频带信号的信噪比得到增强，为后期高分辨率地震资料处理带来了较大益处。
ECL detection system not only possesses the advantages of chemiluminescence detection system such as high sensitivity, instrumental simplicity and a wide dynamic range, but also can overcome some problems in chemiluminescence analysis; for example, the instability of some reagents, the difficulties in temporal and spatial control, the difficulties in reagent regeneration and relatively poor reproducibility rising from heterogenetically mixing.
电化学发光是指通过电化学方法来产生一些特殊的物质，然后这些电生的物质之间或电生物质与其它物质之间进一步反应而产生的一种发光现象。
Clinical College of Ophthalmonogy, Tianjin Medical University, Tianjin Eye Hospital, Tianjin 300020, ChinaA system for measurement to obtain Neural Contrast Sensitivity Function is constructed, according to the relationship between Modulation Transfer Functioncalculated from wave-front date and Contrast Sensitivity Function with a wide range of spatial frequencies.
搭建了基于波前像差的神经对比敏感度测定系统，利用Hartman-Shack波前像差传感器测量人眼波前像差，以及高空间频率的对比敏感度测量仪测量全视觉对比敏感度函数，进而得到人眼的神经对比敏感度。
The results showed thermoplastics of X70 grade pipeline steel is good, the trend of welding thermal crack is close to slight sensitivity(temperature range of brittleness is 60℃), particularly, the trend is relative great in welding normalizing zone.
结果表明，X70级管线钢的热塑性良好，焊接热裂纹倾向为稍敏感（其脆性温度区间为60℃），特别是在焊接正火区的热裂倾向相对较大。
The dynamic range and sensitivity of the system are analyzed and presented.
对其动态测量范围和灵敏度也进行了分析。
In addition, when the modified PVA resins fulfilled requirements in the following: 1 the acetalization degree varied from 60 mol% to 80 mol%, 2 the esterification degree varied from 10 mol% to 20 mol%, 3 the amount of hydroxyl group was 5-25 mol%, 4 the range of value of B/P(the mass ratio of the binder to diazo resin) was from 4 to 4.5, 5 the range of its molecular weight was from 4×10^5 to 8×10^5, the negative PS plate obtained had excellent sensitivity, hydrophobic property, good developability, good ink receptivity and good scratch resistance.
因此其分子量、酯化度和缩醛度的确定，必须综合考虑各项性能之间的平衡。缩醛度为60-80 mol%，酯化度10-15mol%，羟基5-25 mol%，分子量约为4-8万，B/P为4-4.5时，制得的阴图PS版的感度、显影性、着墨性和耐磨性都较好。
The Ce∶LSO single crystal has remarkable scintillation properties with high light output, short decay time, high density, large effective atomic number and well couple between its emission peach and the sensitivity range of photomultipliers.
Ce∶LSO晶体具有优良的闪烁性能，其主要特点是光产额大、发光衰减时间快、密度大、有效原子序数大、辐射长度短、发射峰与光电倍增管的接收范围相匹配，在γ射线探测方面有着广泛的应用。
The result indicates that this miniature structure possess a high degree of linearity, sensitivity and dynamic range.
从中总结了有效的设计方法，可提高FP干涉仪在传感测量中的线性度，动态范围和灵敏度。