The results show that,in comparison with direct sampling,the pre-vacuum sampling can dramatically decrease gas sampling volume,shorten sampling time,and minish the difference of gas sample and the source,and thus improve sampling precision.
为了提高农田温室气体自动采样精度,该文比较了田间自动连续测定系统观测温室气体通量过程中实际管道直接采样与预抽真空采样的差异,结果表明:管道预抽真空采样能显著减少分析时的样品量,缩短采样时间和减小采集气样与源气样的差异,提高了采样的精度。
The cutpoint principle of PM10 air sampler is analyzed and the tracks of particles are studied by numerical computing under the different flow, nozzle dimension and distance between nozzle and impact board.
分析了PM10空气采样器的切割原理 ,并利用数值计算研究颗粒在不同的流量、喷嘴尺寸及喷嘴与冲击板的距离下的运动轨迹 ,从而得到切割头设计参数对切割粒径的影
Research on Truth-preserving Technique of Deep-sea Pressure Tight Sediment Sampler;
深海沉积物保真采样器保真技术的研究
The Research on the Designing of the Deep-Sea Hydrothermal Sampler with High Fidelity by Finite Element Analysis;
热液保真采样器的有限元分析设计研究
Numerical Simulation and Experimental Study on Thermal Insulation Performance of the Sea Bed Sediment Fidelity Sampler
海底沉积物保真采样器保温性能的数值模拟与实验研究
Computer Simulation of Natural Sampling Inverter
自然采样SPWM逆变器的计算机仿真
Research on the Key Technologies of Hydrothermal Fluid Pressure-retaining Sampler at Deep-sea;
深海热液保压采样器的关键技术研究
Control Chaos Using a Sampling Holder and a Low Pass Filter
应用采样保持器和低通滤波器控制混沌
The Principle and Technologies for Sampling Deep-Sea High-Fidelity Hydrothermal Fluids
深海热液保真采样机理及其实现技术研究
Simulation and Analysis of Capacitor Mismatch Error in Sample and Hold Circuit
对采样保持电路中电容失配的误差分析与仿真
Research into Identifying Stamp Inkpad on Paper Text with FTIR-OMNI Sampler;
FTIR-OMNI采样器快速鉴定真伪文书的应用研究
Double-Sampling ΣΔ Modulator Architecture for Broadband Applications and System Simulation
一种宽带双采样ΣΔ调制器结构及其系统仿真
Design of Sample/Hold Circuit for High-Speed 14-Bit A/D Converter
一种用于高速14位A/D转换器的采样/保持电路
A Method of Background Magnetic Field Compensation for Fluxgate Sensors Based on Sample and Hold Circuit
采样保持电路法补偿磁通门传感器背景磁场
To take samples that retain the larger structure of the sediment, a core sampler is used.
为了保持样品沉积物的层次结构，就要用空心铁管采样器。
Performance Analysis on the Seabed Sediment Fidelity Sampler Based on ANSYS and FLUENT
基于ANSYS和FLUENT的海底沉积物原位保真采样系统性能分析
Study on Virtual-Prototype-Based Fault Simulation of the Reducer of Shearer Cutting Unities of Coal Mining Machine
基于虚拟样机技术的采煤机截割减速器故障仿真研究
Soil is sampled with a core sampler.
土壤的采样使用芯形采样器。
General principles of measuring methods of Sample/Hold amplifiers for semiconductor integrated circuits
GB/T14115-1993半导体集成电路采样/保持放大器测试方法的基本原理
A High Resolution Low Power Sample and Hold Module Dedicated to a Pipelined ADC
一个用于流水线模数转换器的高精度、低功耗采样保持电路