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Dive into the research topics where Xu Yunfeng is active.

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Featured researches published by Xu Yunfeng.


international conference on digital manufacturing & automation | 2013

Study on the Number and Placement for Moisture Monitoring Sensor in Lettuce with Substrate Cultivation

Liu Zhigang; Wang Jizhang; Xu Yunfeng; Li Pingping

A continuous monitoring tests for substrate moisture content were carried out in different depths of lettuce field under drip irrigation in greenhouse. Based on the observation data of the moisture probes laid at fixed points, the correlationship between substrate water content in different depths were analyzed, a better method for installing water monitoring points in substrate profile under drip irrigation is selected by R type hierarchical clustering method. Comprehensive analysis the substrate physical properties and the activity root zone of lettuce showed that the moisture sensors buried in 5 and 15 cm for monitoring the substrate moisture content in the depths of 0~15 cm were reasonable.


Sensors and Actuators A-physical | 2007

Current sensor utilizing giant magneto-impedance effect in amorphous ribbon toroidal core and CMOS inverter multivibrator

Zhao Zhan; Li Yaoming; Cheng Jin; Xu Yunfeng


Archive | 2013

Horizontal reciprocated type agitating equipment of straw powder dust wastes

Zhang Xiliang; Xu Yunfeng; Li Pingping; Luo Sheng; Wang Jizhang; Ma Kui; Wu Qi; Zhang Yuan; Lu Xin


Archive | 2013

Material discharging device of spiral quantitative charging machine

Zhang Xiliang; Luo Sheng; Wu Kai; Li Boquan; Ma Kui; Wu Qi; Zhang Yuan; Lu Xin; Xu Yunfeng; Zhang Shiqing


Archive | 2013

Straw cutting, crashing and sieving integrated device and method

Zhang Xiliang; Li Pingping; Xu Yunfeng; Sun Xiaojia; Guo Xi; Lu Xin; Wang Jizhang


Archive | 2015

Separated double-layer rotary drum spiral screening device and method

Chen Cheng; Zhang Xiliang; Shi Yunfei; Wu Shuo; Xu Yunfeng; Li Pingping; Zhang Shiqing; Li Boquan


Archive | 2013

Resource utilization outfit and matrixing method of straw scrap wastes

Zhang Xiliang; Xu Yunfeng; Li Pingping; Luo Sheng; Sun Xiaojia; Lu Xin; Xu Kun; Wen Xiangjun


Archive | 2015

Testing apparatus for straw cutting performance and testing method thereof

Zhang Xiliang; Xu Yunfeng; Sun Xiaojia; Li Pingping; Wu Kai; Feng Yanlei; Lu Xin


Archive | 2014

Closed collection device for crushed material

Xu Yunfeng; Zhang Xiliang; Chen Cheng; Li Pingping; Guo Xi; Lu Xin; Wang Jizhang; Wu Shuo


Archive | 2013

Transparent screw charging test apparatus

Luo Sheng; Wu Kai; Zhang Xiliang; Li Boquan; Ma Kui; Xu Jun; Lu Xin; Xu Yunfeng; Zhang Shiqing; Gu Jian

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Li Pingping

Nanjing Forestry University

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