搜索结果: 1-15 共查到“工学 pump”相关记录97条 . 查询时间(0.412 秒)
Mass spectrometers are extremely precise chemical analyzers that have many applications, from evaluating the safety of drinking water to detecting toxins in a patient’s blood. But building an inexpens...
Production under way of prototype pump unit for lead-cooled BREST-OD-300（图）
lead-cooled BREST-OD-300 prototype pump
2023/3/7
Assembly has begun for the prototype of the main circulation pump unit (MCPU) for the lead-cooled fast neutron reactor BREST-OD-300 being built in Russia.
Custom, 3D-printed heart replicas look and pump just like the real thing（图）
3D打印 心脏复制品 软机器人模型
2023/6/19
No two hearts beat alike. The size and shape of the the heart can vary from one person to the next. These differences can be particularly pronounced for people living with heart disease, as their hear...
Taming random lasers through active spatial control of the pump
Taming random lasers active spatial control pump
2012/2/24
Active control of the pump spatial profile is proposed to exercise control over random laser emission. We demonstrate numerically the selection of any desired lasing mode from the emission spectrum. A...
Determination of the Triplet State Lifetime of C60 /Toluene Solution and C60 Thin Films by Pump-Probe Method
Excited State Lifetimes All-Optical Switching Fullerenes
2013/1/30
Excited state lifetimes of C60/toluene solution and C60 films macromolecular were measured by pump-probe method. Relation between optical switching effect of material and pulse width of pumping field ...
Numerical Investigation on Fluid Structure Interaction Considering Rotor Deformation for a Centrifugal Pump
centrifugal pump fluid structure interaction coupled solution
2011/8/5
The existing researches for unsteady flow field and the corresponding flow induced vibration analysis of centrifugal pump are mainly carried out respectively without considering the interaction betwee...
Simple self-gettering differential-pump for minimizing source oxidation in oxide-MBE environment
self-gettering differential-pump oxide-MBE minimizing source oxidation
2011/9/9
Source oxidation of easily oxidizing elements such as Ca, Sr, Ba, and Ti in an oxidizing ambient leads to their flux instability and is one of the biggest problems in the multi-elemental oxide Molecul...
Dual Pump Wave Generation from NRZ-ASK Signal Enabling a “Black-Box” Phase Sensitive Amplifier
Fiber optics amplifiers and oscillators Nonlinear optics parametric processes Lasers injection-locked
2015/5/26
We present a phase locking scheme that enables the demonstration of the first black-box dual pump degenerate phase sensitive amplifier for 10 Gbit/s NRZ-ASK signals.
Self-seeded 1-to-60 Multicasting in a Two-pump Parametric Mixer
Nonlinear optics parametric processes Networks multicast
2015/5/26
We demonstrate a new multicasting scheme requiring only two CW tones to deliver spectrally-distinct copies of the input channel. 1-to-60 multicasting operation was achieved with 28 mW per-copy power e...
Two-Pump Distributed Parametric Amplification for Optically Powered Communication System
Fiber optics amplifiers oscillators Nonlinear optics parametric processes
2015/5/25
We demonstrate a power-efficient two-pump distributed parametric amplification(DPA) system. The residual pumps are recycled to power up the receiving component. At the BER of 10 −9 , power penal...
One-to-Eleven (11x10-Gb/s) All-Optical NRZ-to-RZ Format Conversion and Wavelength Multicasting Using a Single Pump in a Highly Nonlinear Fiber
All-Optical NRZ-to-RZ Format Conversion Wavelength Multicasting Single Pump Highly Nonlinear Fiber
2015/5/21
We demonstrate one-to-eleven NRZ-to-RZ format conversion and wavelength multicasting using one pump in a highly-nonlinear-fiber based on various nonlinear processes including XPM, XGM and FWM. Eleven ...
7×10-Gbit/s All-optical Wavelength Multicast based on Cross-gain Modulation and Cascaded Four-wave Mixing Effects in an SOA Using Single Pump Laser Source
All-optical Wavelength Cross-gain Modulation Cascaded Four-wave Mixing
2015/5/15
By combining XGM, and cascaded FWM effects in an SOA, seven multicast channels with 100-GHz spacing are demonstrated using single pump laser source. The power penalty of these multicast channels is le...
长距离输水系统停泵水锤的数值模拟（Numerical Simulation of the Water Hammer Caused by Accidental Pump-stop in Long Water Supply Systems）
泵站 供水工程 水力计算 水锤压力
2010/12/29
运用瞬态水力学理论和特征线方法，结合某实际工程，对联合采用空气阀、泄压阀和二阶段缓闭蝶阀进行水锤防护的长距离有压输水管道系统的事故停泵水力过渡过程进行了计算和分析，得到管线沿程的水锤压力包络线和空化体积曲线，以及典型断面的压力时程线。计算结果表明，采用两阶段缓闭蝶阀、泄压阀和空气阀进行水锤安全防护是十分必要的，有利于抑制正水锤压力的继续升高和阻止负水锤压力的持续降低，防止断流弥合水锤的发生。但从计...
泵站多机组叶片全调节优化运行分解-动态规划聚合方法（Study of Optimal Operation Method on Multiple Pump Units with Adjustable-blade for Single Pumping Station Based on Decomposition-dynamic Programming Aggregation Method）
泵站 多机组 叶片全调节 优化运行模型
2010/12/29
针对泵站多机组叶片全调节日优化运行数学模型，提出了大系统分解-动态规划聚合求解方法。以泵站日提水耗电费用最小为目标，机组提水量为协调变量，将该模型分解为若干个单机组叶片全调节日优化运行子模型。该子模型以机组叶片安放角为决策变量，机组提水量的离散值为状态变量，采用动态规划方法求解。构造的聚合模型以各机组提水量为决策变量，泵站提水量的离散值为状态变量，同样采用动态规划方法求解。该方法可解决安装不同型号...
低比转数潜水电泵无过载设计（Non-overload Designing Research on Low Specific Speed Submersible Pump）
潜水电泵 低比转数 无过载
2010/12/29
结合BQS80-180/3-90型低比转数潜水电泵的设计，分析叶轮结构参数对泵轴功率特性的影响。在保证泵运行时最大轴功率不超过配套电动机输入功率的前提下，为了能够减小配套电动机功率，进一步研究减小泵最大轴功率的方法，提出了叶轮结构参数设计判别公式。利用Fluent软件对轴功率进行预测，结果表明：利用该判别公式设计的叶轮，最大轴功率与额定设计工况下轴功率的比值小于1.2。通过样机试验，各项参数均达到...