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RISS 인기검색어
- 검색키워드
- 저자 : Kong Degang (검색결과 3 건)
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Analysis of Blue Honeysuckle Binding Force During Harvest Period
Yongchao Zhao,Degang Kong,Junwei Huo 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.8
The purpose of this study is to understand the characteristics of proper binding force to harvest blue honeysuckle. After tracking such force over 16 days for four breeds of blue honeysuckle during the harvest period, we find that the binding force is mainly distributed in the range of 0.1 ~ 1.7N (P<0.05). This distribution range varies slightly between breeds: the picking forces of L.caerulea subsp.altaicai and Berel are greater than Bluebird and wild L.caerulea var.edulis of Changbai Mountain, and the binding forces of all breeds decrease over time with different slopes. Moreover, we also find that the binding force in the afternoon are significant larger than in the morning for the same day (P<0.05), and no significant difference is found between sunny and rainy days. We categorize factors affecting the binding force, such as testing day, morning and afternoon, relative humidity, temperature, weather conditions into environmental factors and time factor.
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Test Research on Influence Rule of Subsoiling Pressure to Subsoiling Quality
Zuo Shengjia,Kong Degang,Liu Chunsheng,Li Zhihui,Zhao Yongchao 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.10
Pneumatic subsoiling is a new subsoiling technology which uses the pneumatic fracturing principle. To conduct a research on the influence rules of subsoiling pressure to subsoiling quality, the method combining the soil resistivity test and CFD simulation test will be adopted to carry out a pneumatic subsoiling test through taking the increasing rate of soil porosity and soil surface uplift as evaluation index. The test results indicate that after pneumatic subsoiling, the soil porosity of plow pan increases obviously under different subsoiling pneumatic, effective break the plow pan; with the increase of bulk density of plow pan, the spread of the high pressure gas upwards in the plow pan shows a weakening trend and its spread towards horizontal direction shows a enhancing trend; for the plow pan with larger bulk density, the increasing rate of soil porosity and soil surface uplift will increase with the increasing of subsoiling pneumatic accordingly and for the plow pan with smaller bulk density, its regularity is not obvious. Simultaneously, the subsoiling pneumatic and its technical parameters fit for plow pan with different bulk density will be obtained to provide a basis for in-depth research of pneumatic subsoiling technology and development of Pneumatic subsoiling machine.
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Optimization dynamic responses of laminated multiphase shell in thermo-electro-mechanical conditions
Fan, Linyuan,Kong, Degang,Song, Jun,Moradi, Zohre,Safa, Maryam,Khadimallah, Mohamed Amine Techno-Press 2022 Advances in nano research Vol.13 No.1
The optimization for dynamic response associated with a cylindrical shell which is made of laminated composites embedded in a piezoelectric layer which is subjected to temperature rises and is resting on an elastic foundation is investigated for the first time. The first shear order theory (FSDT) is utilized in order to obtain the strain relations of the shell. Then, using the energy method, the equations of motions as well as boundary condition of the problem are attained. The formulation of this study together with the solution procedure which is a numerical solution method, differential quadrature method (DQM) is validated using other researches. This paper presents a thorough study on the parameters which impacts the vibration frequency of the laminated shell. The results of this paper shows that any type of laminated composite shell can reduce the vibration frequency providing that the angle related to layer are higher than 85 degrees. Also, in order to reduce the effect of temperature rises, the laminated composites instead of orthotropic one can be used.
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