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The introduced model can simulate both the steady state and the transient temperature field of the top surface of the thermal sensitive layer on a bolometer detector.

本文主要介绍用有限元数值分析的方法对非致冷红外测辐射热计探测器的温度分布进行计算,其有限元模型可以对测辐射热计探测器热敏层表面的稳态和瞬态温度场进行仿真。

Base on the mathematical equation: the quantity of conduction heat flex is equal to the product of heat conduction coefficient and gradient of temperature, we expect to obtain the result which is better than that of Transient Hot-wire Method and Steady-State Parallel-Plate Method, and simplify the strategy of measurement.

理论模式关系中,使用热传量等於热传系数与温度梯度乘积的比例关系式作为理论基础,目的在得到更优於暂态热金属线法(Transient Hot-wire Method)及稳态平行板法(Steady-State Parallel-Plate Method)的量测结果,同时也简化了量测方式。

The vapour and plasma ignition times of the target are got based on the equation of heat conduction and cascade model. We suppose that the plasma is ignited when 210 generations of new electrons are born in vapour generation time. The influence of temperature on the thermodynamics and optics parameters of material also have been considered in the model. The resulting theory has good agreement with the experiment and overseas report. A blade method to measure the laser spot is given in this paper with validation and error analysis. The plasma threshold of metals in atmosphere and water ambients both are diagnosed with the light deflection and piezoelectric transducer. A Q-switched pulsed Nd:YAG laser operating at infrared (1064nm), visible(532nm) and ultraviolet (355nm) wavelengths has been used. Al、Fe、Cu are used as targets and get a similar results with both method. Theoretical and experimental analyses are applied on the influence of wavelength on the threshold have been done, both of which have shown that the plasma threshold of metals decrease as the laser wavelength increases; The plasma threshold of metals are higher in water than in air and the pressure of the shock wave in water is five times higher than in air.

从热传导方程和雪崩电离机制出发,假设当电子增值2~(10)倍时,考虑了温度对材料热力学和光学参数的影响时,得到了气化和等离子体点燃的时间,利用该模型进行计算得到的结果与国内外报道及自行通过实验测得的阈值基本一致;提出了利用刀刃法测量激光光斑面积的方法,并通过实验进行了验证和误差分析;利用光偏转装置和压电换能器分别对空气和水中金属等离子体点燃阈值进行了实验诊断,激光器均为调Q—YAG激光器(波长1064nm,532nm,355nm,脉宽10ns),靶材分别为Al、Fe和Cu,两种测试方法得到的等离子体点燃阈值基本一致;本文从实验和理论计算两个方面讨论了波长对等离子体点燃阈值的影响,均得到了等离子体点燃阈值随着波长的增加而减小的结论;对空气中和水中不同环境下金属等离子体的点燃阈值进行了比较研究,得到了金属在水中的等离子体点燃阈值比空气中的大,且水中产生的冲击波的压强是空气中的5倍左右的结论。

Company Profile Beijing Xinyu win equipment limited liability company operating mainly in the production and domestic and international advanced testing equipment, instrumentation, and diagnostic tools, as well as introduce advanced test, measurement of new technology for operating purposes. A: electrical fire, building fire detection and public safety facilities, equipment detectors B: lightning protection, lightning protection device detection equipment, mine detection device safety box C: Fire Fire Safety Inspection and Testing equipment, and investigate the cause of the fire equipment, police station fire alarm Services and equipment D: fire inspection and fire investigation equipment boxes, fire investigation kits, fire detection equipment to determine the scene Product E: Fire Engineering Detect boxes, cartons Detect building fire service installations, fire detection electrical box F: Airport Fire fire inspection equipment, subway Fire Safety Detect Box G: boilers, pressure vessels and special equipment, elevator equipment Detect H: Victoria seized power telecommunications equipment boxes, mechanical state patrol boxes I: Detect safety boxes, traffic accident investigation boxes, property management Detected me J: Public environmental hygiene Detect boxes, boxes of food safety at the scene detection, occupational health care at the scene Detect boxes, cartons Detect Radiological Protection at the scene, the situation of sanitation and disinfection Detected me, health production supervisor at the scene seized me K: Ultrasonic leak detector, ultrasonic spectrum analyzer, ultrasonic full-function fault detection system L: fire using infra-red thermal imaging, infrared imaging system for industrial use, the security-type infra-red thermal imaging M: Energy Conservation Supervision and Testing Instruments instrument N: Private Product: 3 1/2- 8 1 / 2 handheld / desktop Digital Multimeter, cross-DC clamp level pressure ammeter, temperature gauges, tachometer, digital megohm table, grounding resistance tester, desktop multimeter, digital frequency meter smart, figure synthesis / function signal generator, desktop digital electric bridge, oscilloscopes, infrared thermometer, vibrometer, digital DC regulated power supply, 5 1 / 2 hand-held multi-function calibrator field process instrumentation. O: agent Products:, infrared thermometer, infrared, ultrasonic full-function fault leakage / discharge detection device, flammable / toxic gas detector, harmonic power quality analyzer, portable ultrasonic flowmeter, insulation / Ground Resistance Tester, temperature, current / voltage, the process of signal, thermal resistance / thermocouple, pressure, loop calibrator, such as electronics, telecommunications, electricity, petroleum chemical industry, safety inspection, steel smelting, public environmental protection, fire detection Secret rescue, fire detection equipment, special equipment testing, military field equipment dedicated monitoring equipment and tools.

公司简介北京新宇胜利仪器有限责任公司主要以生产和经营国际,国内先进的检测仪器仪表和设备诊断工具以及介绍先进的测试,测量新技术为经营宗旨。A:消防电气、建筑消防设施检测和公共安全侦检仪器设备B:防雷、避雷装置检测仪器设备、防雷装置安全检测箱C:消防防火监督检测装备、火灾原因调查装备、公安派出所消防警务装备D:防火检查与火灾勘查仪器箱、火灾勘查工具箱、消防产品现场判定检测仪器E:消防工程检测箱、建筑消防设施检测箱、消防电气检测箱F:机场消防防火检查仪器设备、地铁消防安全检测箱G:锅炉、压力容器和特种设备、电梯检测仪器H:电信电源维检仪器箱、机械状态巡检箱I:交通安全检测箱、交通事故勘查箱、物业管理检测箱J:公共卫生环境检测箱、食品安全现场检测箱、职业健康监护现场检测箱、放射防护现场检测箱、卫生消毒状况检测箱、健康品生产现场监检箱K:超声波泄漏检测仪、超声波频谱分析仪、超声波全功能故障检测系统L:消防用红外热像仪、工业用红外热像仪、本安型红外热像仪M:节能监督检测仪器仪表工具N :自有产品:3 1/2-8 1/2位手持/台式数字多用表,交、直流钳形高低、压电流表,温度仪表,转速表,数字兆欧表,接地电阻测试仪,台式多用表,数字智能频率计,数字合成/函数信号发生器,台式数字电桥,示波器,红外测温仪,测振仪,数字直流稳压电源,5 1/2位手持式多功能现场过程仪表校验仪。O:代理产品:,红外测温仪,红外热像仪,超声波全功能故障泄漏/放电侦测仪,可燃/有毒气体检测仪,电力质量谐波分析仪,便携式超声波流量计,绝缘/接地电阻测试仪,温度、电流/电压、过程信号、热电阻/热电偶、压力、回路校验仪等电子、通讯、电力、石油化工、安全检查、钢冶、公共环保、消防特勤侦检救援、消防检测设备、特种设备检测、军事领域的专用仪器监测设备与工具。

Analyses show that refractive index changeinduced by thermal effect is similar to the change induced by other effects for linearabsorption,if laser pulse width is far less than the characteristic time of sample,i.e.refractive index change is directly proportional to spatial part of incident pulse laserintensity,so time averaged nonlinear refractive index can be defined.

结果表明,当激光脉冲宽度远小于被测样品的特征时间时,对于线性吸收来说,其热效应产生的折射率变化与其它效应产生的折射率变化有类似的形式,即与入射脉冲激光光强的空间部分成正比。因而可定义时间平均非线性折射率。在这种情况下,可用通常的Z-scan法进行非线性折射率及热光系数的测量,所得结论符合以前的实验结果。

The year 2008 is likely to rank as the 10th warmest year on record since the beginning of the instrumental climate records in 1850. The global combined sea-surface and land-surface air temperature for 2008 is currently estimated at 0.31℃ above the 1961-1990 annual average of 14.00℃. Ten of the warmest years were all among the recent 12 years, indicating a continuous trend of global warming.

2008年可能是自1850年开始有器测记录以来全球第10个最暖的年份,全球海面和陆面综合气温比1961—1990年的年平均高0.31℃,150 a 来最热的10个年份都集中在最近12 a 里,全球气候变暖的趋势仍在持续。

The field test about the outdoor thermal environment has been performed in a campus in Jinan.Based on the experimental data,the regularity of outdoor air temperature,relative humidity,air velocity and underground temperature with different underlayer condition are analyzed.

对济南某高校新校区的室外热环境进行了现场测试,在测得的实验数据的基础上分析了不同下垫面对空气温度、相对湿度、风速及地表温度的影响。

Four major OTUs of prokarotype X group belong to Cyanobacterium.

原核类群X的4个序列主要属于蓝细菌类群,其中JS-X2与在美国黄石公园温泉发现的Uncultured Cyanobacterium (L35331)有95%的相似性,并且与已经全基因组测序的嗜热蓝细菌聚球藻Thermosynechococcus elongatus BP-1 (47118315)有89%的相似性。

So the technique of uncooled microbolometer infrared imaging has become one of the main points from now on. In the paper uncooled microbolometer infrared imaging system is studied from focal plane character, image dealing and application. The details are in the following: On uncooled microbolometer infrared focal plane aspect: first, the work principle of microbolometer, manufacturing technology of microbolometer infrared focal plane, temperature balance equation of microbolometer detector are analyzed. The performance of microbolometer detector is predicted by model. Second, the infrared focal plane is the core of infrared system, whose quality can determine the performance of the system. It is the precondition that the high quality of every detective unit maintains the qualification of the focal plane. The even degree of detective units has great influence on imaging characters if the other characters of detective units are normal.

本文以非致冷微测辐射热计红外成像系统为对象,从焦平面特性、图像处理和红外系统应用方面展开分析、研究,具体内容如下;在微测辐射热计红外焦平面方面,首先分析了微测辐射热计的工作原理、微测辐射热计红外焦平面的工艺制作、微测辐射热计探测单元的温度平衡方程,根据有关参数对其特性进行建模预测;其次,红外焦平面是红外系统的核心,它的质量的好坏直接决定系统性能,因此保证其各探测单元的高性能是维护焦平面品质的前提,在探测单元其它特性正常的情况下,各探测单元之间特性的均匀程度对系统成像性能有极大影响,为此本文提出自适应滤波多项式焦平面非均匀性校正算法从软件角度解决焦平面的固有的噪声问题。

The plasma ignition threshold of metal is got through experimental and numerical study. The vapour and plasma ignition times of the target are got based on the equation of heat conduction and cascade model. We suppose that the plasma is ignited when generations of new electrons are born in vapour generation time. The influence of temperature on the thermodynamics and optics parameters of material also have been considered in the model. The resulting theory has good agreement with the experiment and overseas report. A blade method to measure the laser spot is given in this paper with validation and error analysis. The plasma threshold of metals in atmosphere and water ambients both are diagnosed with the light deflection and piezoelectric transducer. A Q-switched pulsed Nd:YAG laser operating at infrared (1064nm), visible(532nm) and ultraviolet (355nm) wavelengths has been used. Al、Fe、Cu are used as targets and get a similar results with both method. Theoretical and experimental analyses are applied on the influence of wavelength on the threshold have been done, both of which have shown that the plasma threshold of metals decrease as the laser wavelength increases; The plasma threshold of metals are higher in water than in air and the pressure of the shock wave in water is five times higher than in air .

从热传导方程和雪崩电离机制出发,假设当电子增值210倍时,考虑了温度对材料热力学和光学参数的影响时,得到了气化和等离子体点燃的时间,利用该模型进行计算得到的结果与国内外报道及自行通过实验测得的阈值基本一致;提出了利用刀刃法测量激光光斑面积的方法,并通过实验进行了验证和误差分析;利用光偏转装置和压电换能器分别对空气和水中金属等离子体点燃阈值进行了实验诊断,激光器均为调Q-YAG激光器(波长1064nm,532nm,355nm,脉宽10ns),靶材分别为Al、Fe和Cu,两种测试方法得到的等离子体点燃阈值基本一致;本文从实验和理论计算两个方面讨论了波长对等离子体点燃阈值的影响,均得到了等离子体点燃阈值随著波长的增加而减小的结论;对空气中和水中不同环境下金属等离子体的点燃阈值进行了比较研究,得到了金属在水中的等离子体点燃阈值比空气中的大,且水中产生的冲击波的压强是空气中的5倍左右的结论。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

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