4篇
您的检索式：作者名="Hongyong FU"
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| 1 | Online condition diagnosis for a two-stage gearbox machinery of an aerospace utilization system using an ensemble multi-fault features indexing approach显示文摘China manned space station is designed to operate for over ten years. Long-term and sustainable research on space science and technology will be conducted during its operation. The application payloads must meet the ‘‘long life and high reliability' mission requirement. Gearbox machinery is one of the essential devices in an aerospace utilization system, failure of which may lead to downtime loss even during some disastrous catastrophes. A fault diagnosis of gearbox has attracted attentions for its significance in preventing catastrophic accidents and guaranteeing sufficient maintenance. A novel fault diagnosis method based on the Ensemble Multi-Fault Features Indexing(EMFFI) approach is proposed for the condition monitoring of gearboxes. Different from traditional methods of signal analysis in the one-dimensional space, this study employs a supervised learning method to determine the faults of a gearbox in a two-dimensional space using the classification model established by training the features extracted automatically from diagnostic vibration signals captured. The proposed method mainly includes the following steps. First, the vibration signals are transformed into a bi-spectrum contour map utilizing bi-spectrum technology,which provides a basis for the following image-based feature extraction. Then, Speeded-Up Robustness Feature(SURF) is applied to automatically extract the image feature points of the bi-spectrum contour map using a multi-fault features indexing theory, and the feature dimension is reduced by Linear Discriminant Analysis(LDA). Finally, Random Forest(RF) is introduced to identify the fault types of the gearbox. The test results verify that the proposed method based on the multi-fault features indexing approach achieves the target of high diagnostic accuracy and can serve as a highly effective technique to discover faults in a gearbox machinery such as a two-stage one. | Min ZHOU Ke WANG Yang WANG Kaiji LUO Hongyong FU Liang SI | 2019 | Chinese Journal of Aeronautics2019，32，5： | 6 |
| 2 | Asymmetric distribution of cytokinins determines root hydrotropism in Arabidopsis thaliana显示文摘The phenomenon of plant root tips sensing moisture gradient in soil and growing towards higher water potential is designated as root hydrotropism,which is critical for plants to survive when water is a limited factor.Molecular mechanisms regulating such a fundamental process,however,are largely unknown.Here we report our identification that cytokinins are key signaling molecules directing root growth orientation in a hydrostimulation(moisture gradient)condition.Lower water potential side of the root tip shows more cytokinin response relative to the higher water potential side.Consequently,two cytokinin downstream type-A response regulators,ARR16 and ARR17,were found to be up-regulated at the lower water potential side,causing increased cell division in the meristem zone,which allows the root to bend towards higher water potential side.Genetic analyses indicated that various cytokinin biosynthesis and signaling mutants,including the arr16 arr17 double mutant,are significantly less responsive to hydrostimulation.Consistently,treatments with chemical inhibitors interfering with either cytokinin biosynthesis or cell division completely abolished root hydrotropic response.Asymmetrically induced expression of ARR16 or ARR17 effectively led to root bending in both wild-type and miz1,a previously known hydrotropism-defective mutant.These data demonstrate that asymmetric cytokinin distribution is a primary determinant governing root hydrotropism. | Jinke Chang Xiaopeng Li Weihao Fu Jiawen Wang Yueyuan Yong Hongyong Shi Zhaojun Ding Hong Kui Xiaoping Gou Kai He Jia Li | 2019 | Cell Research2019，29，12： | 4 |
| 3 | Use of alternate splice sites in granule-bound starch synthase mRNA from low-amylose rice varieties显示文摘 | H. Frances J. Bligh Patrick D. Larkin Paul S. Roach Christopher A. Jones Hongyong Fu William D. Park | 1998 | Plant Molecular Biology1998，，3： | 1 |
| 4 | Use of alternate splice sites in granule-bound starch synthase mRNA from low-amylose rice varieties显示文摘 | H. Frances J. Bligh Patrick D. Larkin Paul S. Roach Christopher A. Jones Hongyong Fu William D. Park | 1998 | Plant Molecular Biology1998，，3： | 1 |
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