搜索结果: 1-15 共查到“工学 cleaning”相关记录29条 . 查询时间(0.062 秒)
Cleaning technique boosts electronic, photonic prospects of aluminum nitride（图）
清洗技术 氮化铝 光电子学
2023/5/19
A group of researchers led by Cornell is unlocking the full potential of aluminum nitride – an important material for the advancement of electronics and photonics – thanks to the development of a surf...
Stanford engineers design a robotic gripper for cleaning up space debris
Stanford engineers design robotic gripper cleaning up space debris
2017/7/24
Right now, about 500,000 pieces of human-made debris are whizzing around space, orbiting our planet at speeds up to 17,500 miles per hour. This debris poses a threat to satellites, space vehicles and ...
A Data-Cleaning Tool for Building Better Prediction Models
Data-Cleaning Tool Prediction Models
2016/9/12
Big data sets are full of dirty data, and these outliers, typos and missing values can produce distorted models that lead to wrong conclusions and bad decisions, be it in health care or finance. With ...
CHANGE SEMANTIC CONSTRAINED ONLINE DATA CLEANING METHOD FOR REAL-TIME OBSERVATIONAL DATA STREAM
Real-time observational data stream Change semantic constraint Kalman filtering
2016/7/8
Recent breakthroughs in sensor networks have made it possible to collect and assemble increasing amounts of real-time observational data by observing dynamic phenomena at previously impossible time an...
A Rule Management System for Knowledge Based Data Cleaning
Rule Data Quality Data Cleaning Knowledge Rule Management System Rule Based System Structure
2013/1/28
In this paper, we propose a rule management system for data cleaning that is based on knowledge. This system combines features of both rule based systems and rule based data cleaning frameworks. The i...
油菜分段收获脱粒清选试验（Experiment on Threshing and Cleaning in Two-stage Harvesting for Rapeseed）
油菜 分段收获 脱粒 清选
2010/12/28
对我国南方油菜分段收获割晒后的脱粒清选特性和脱粒清选参数进行了研究。通过在试验台上脱粒和清选正交试验，得出了分段收获捡拾脱粒机脱粒、清选部件形式和两组合理的工作参数。试验结果表明：脱粒分离夹带损失最小的优选参数组合为喂入量1.6kg/s、滚筒转速750r/min、脱粒间隙15mm、滚筒形式钉齿6排；影响脱粒分离夹带损失率的主次因素为滚筒形式、喂入量、脱粒间隙和滚筒转速。综合考虑清选损失率和含...
阵列式压电晶体传感器谷粒清选损失监测仪设计（Design of Intelligent Grain Cleaning Losses Monitor Based on Array Piezocrystals）
联合收获机 清选损失 在线监测 压电晶体阵列
2010/12/28
设计了由阵列式压电晶体传感器、阵列信号调理系统及单片机监测系统组成的谷粒清选损失监测仪，并制作了仪器样机。测试试验结果表明，阵列式压电晶体谷粒清选损失监测仪对损失谷粒响应时间在1 s以内，测量误差小于5%，且对实际收获工况中各种干扰能有效地抑制。
Managing psychosocial risks with cleaning workers
Managing psychosocial risks cleaning workers
2014/4/24
Psychosocial risk factors for professional cleaning workers are many and varied. Psychosocial risks include any psychological and social factors that can affect people’s health and well-being, such as...
Nanodome Solar Cells with Efficient Light Management and Self-Cleaning
Nanocone nanodome solar cell light trapping photovoltaics
2015/8/10
Here for the first time, we demonstrate novel nanodome solar cells, which have periodic nanoscale modulation for all layers from the bottom substrate, through the active absorber to the top tran...
风筛式清选装置筛面气流场试验（Experiment on the Flow Field of the Air-and-screen Cleaning Device）
风筛 清选装置 气流场 试验
2009/12/28
在DFQX-3型物料清选仿真试验台上，通过空间布点测量了筛面不同位置的气流速度。根据测量值得出筛面上流速小于或等于4.81 m/s，属低速气流。利用Matlab绘制了筛面不同位置的横断面、纵断面、水平面的等速线和速度变化曲线，分析了风筛式清选装置的筛面气流场速度分布规律。试验表明，筛面两侧的流速对称分布，前后两端流速较接近，中间流速变化复杂。
纵轴流脱粒分离-清选试验台设计（Development on Test-bed of Longitudinal Axial Threshing-separating-cleaning Unit）
纵轴流 脱粒装置 清选装置 试验台
2009/12/28
设计的纵轴流式脱粒分离〖CD*2〗清选试验台以切流与纵轴流组合式脱粒分离装置、风筛式清选装置为核心，采用可组合的模块化结构，工作部件结构和运动参数的调整简单、方便，可获得多个工况下脱粒分离、清选性能指标以及脱出物的分布规律。试验台以工控机和信号采集卡作为硬件控制系统的核心，采用VC++编写的测控软件系统可以对试验过程中工作部件的转速、频率、扭矩和功率等参数进行实时采集、显示、处理与分析，为纵轴流联...
Does the lichen flora already reflect changes in air quality in the Šalek valley after the construction of cleaning devices in the Šoštanj thermal power plant?
bioindication epiphytic lichens Hypogymnia physodes mapping Pb Cd Zn As
2009/11/27
Lichens are often used as bioindicators of air pollution due to their biology. Their thallus is without any true tissues and organs, the cuticle and roots are not developed. They get all needed substa...
Cleaning is carried out in every workplace. The cleaning industry itself is a growing sector, as it is a service that is increasingly being put out to tender. While there are some very large cleaning ...
GAS POLLUTANT CLEANING BY A MEMBRANE REACTOR
ammonia decomposition nickel/alumina catalyst ceramic membrane
2009/10/13
An alternative technology for the removal of gas pollutants at the intergrated gasification combined cycle process for power generation is the use of a catalytic membrane reactor. In the present study...
The occupational safety and health of cleaning workers
occupational safety health of cleaning workers
2014/4/24
This report provides an overview of the most important issues related to occupational safety and health (OSH) for cleaning workers in terms of working conditions, risks and prevalence of exposures and...