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Design and performance test of a novel UAV air-assisted electrostatic centrifugal spraying system

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International Journal of Agricultural and Biological Engineering 2022年第5期15卷 34-40页

作者： heming Hu Yutaka Kaizu Jingjing Huang Kenichi Furuhashi Hongduo Zhang Xu xiao Ming Li Kenji Imou Graduate School of Agricultural and Life Sciences the University of TokyoTokyo 113-0033Japan Hunan Agricultural Equipment Research Institute Changsha 410125China Hunan Advanced Engineering Technology Research Center for Agricultural Aviation Changsha 410125China Hunan Agricultural University Changsha 410128China

In order to improve the deposition and uniformity of the pesticide sprayed by the agricultural spraying drone,this study designed a novel spraying system,combining air-assisted spraying system with electrostatic ***,an air-assisted electrostatic centrifugal spray system was designed for agricultural spraying drones,including a shell,a diversion shell,and an electrostatic ***,experiments were conducted to optimize the setting of the main parameters that affect the charge-to-mass ratio,and outdoor spraying experiments were carried out on the spraying effect of the air-assisted electrostatic centrifugal spray *** results showed the optimum parameters were that the centrifugal rotation speed was 10000 r/min,the spray pressure was 0.3 MPa,the fan rotation speed was 14000 r/min,and the electrostatic generator voltage was 9 kV;The optimum charge-to-mass ratio of the spray system was 2.59 mC/*** average deposition density of droplets on the collecting platform was 366.1 particles/cm^(2) on the upper layer,345.1 particles/cm^(2) on the middle layer,and 322.5 particles/cm^(2) on the lower *** to the results of uncharged droplets on the upper,middle,and lower layers,the average deposition density was increased by 34.9%,30.4%,and 30.2%,respectively,and the uniformity of the distribution of the droplets at different collection points was better.

关键词： UAV spraying droplet drift centrifugal sprayer air-assisted spraying electrostatic spraying

Paleogene geological framework and tectonic evolution of the central anticlinal zone in Lufeng 13 sag,Pearl River Mouth Basin

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Petroleum Research 2019年第3期4卷 238-249页

作者： Xudong Wang Xiangtao Zhang heming Lin xiaoming Que Yong He Liankai Jia Zhangbo xiao Min Li Shenzhen Branch CNOOC China LimitedGuangdong518000China

The Paleogene geological framework and evolution process in the central anticline zone in the Lufeng 13 sag in Pearl River Mouth Basin is well analyzed through seismic data and drilling data,and control of tectonic evolution on hydrocarbon accumulation is also *** results show that the central anticline zone in the Lufeng 13 sag develops the upper deformation layer and lower deformation ***“arched graben system”is developed in the upper deformation layer,and the magmatic diapir structure and flowing deformation of plastic strata is developed in the lower deformation *** evolution process of the central anticline zone can be divided into four stages,*** block uplifting stage,prototype stage,strengthening stage and finalization *** geological framework and tectonic evolution of the central anticline zone control Paleogene hydrocarbon *** Paleogene twolayer geological framework is favorable for development of structural traps and composite traps;the paleostructure highs are the direction of hydrocarbon migration,and the gravitational gliding faults are the main carrier bed for vertical hydrocarbon migration;the tectonic uplift is a key factor for reservoir diagenesis improvement and preservation of primary pores,and also controls distribution of high-quality reservoirs.

关键词： Geological framework Upper and lower deformation layers Gravitational gliding faults Hydrocarbon migration and accumulation Carrier bed The central anticline zone Lufeng sag

Method for C/N ratio estimation using Mask R-CNN and a depth camera for organic fraction of municipal solid wastes

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International Journal of Agricultural and Biological Engineering 2021年第5期14卷 222-229页

作者： Jingjing Huang Hongduo Zhang Xu xiao Jingqi Huang Jingxin Xie Liang Zhang heming Hu Sihui Dai Ming Li Yongwei Xu College of Mechanical and Electrical Engineering Hunan Agricultural UniversityChangsha 410128China Graduate School of Agricultural and Life Sciences the University of TokyoTokyo 113-0033Japan Hunan Agricultural Equipment Research Institute Changsha 410125China College of Horticulture Hunan Agricultural UniversityChangsha 410128China Center for Spatial Information Science University of TokyoKashiwa 277-8568Japan

Fast assessment of the initial carbon to nitrogen ratio(C/N)of organic fraction of municipal solid waste(OFMSW)is an important prerequisite for automatic composting control to improve efficiency and stability of the bioconversion *** this study,a novel approach was proposed to estimate the C/N of OFMSW,where an instance segmentation model was applied to predict the masks for the waste ***,by combining the instance segmentation model with the depth-camera-based volume calculation algorithm,the volumes occupied by each type of waste were obtained,therefore the C/N could be estimated based on the properties of each type of ***,an instance segmentation dataset including three common classes of OFMSW was built to train mask region-based convolutional neural networks(Mask R-CNN)***,a volume measurement algorithm was proposed,where the measurement result of the object was derived by accumulating the volumes of small rectangular cuboids whose bottom area was calculated with the projection *** the calculated volume was corrected with linear regression *** results showed that the trained instance segmentation model performed well with average precision scores AP_(50)=82.9,AP_(75)=72.5,and mask intersection over unit(Mask IoU)=45.1.A high correlation was found between the estimated C/N and the ground truth with a coefficient of determination R2=0.97 and root mean square error RMSE=*** relative average error was 0.42%and the maximum error was only 1.71%,which indicated this approach has potential for practical applications.

关键词： carbon to nitrogen ratio estimation volume measurement organic fraction of municipal solid waste depth camera instance segmentation

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火焰兰属间杂交育种研究进展

中国农学通报 2024年第13期40卷 76-82页

作者：杨松敏姜潇程梦雅王顺顺段燕如陈和明彭东辉福建农林大学风景园林与艺术学院/兰科植物保护与利用国家林草局重点实验室/福建省观赏植物种质资源创新与应用工程技术研究中心福州350002 广东省农业科学院环境园艺研究所/广东省园林花卉种质创新综合利用重点实验室广州510640

杂交育种是兰花资源开发和利用的重要手段。火焰兰属(Renanthera)植物杂交亲和力较好,常进行属间杂交,也是研究植物远缘杂交障碍的重要研究材料之一。本研究简述了火焰兰属植物种植资源基本特征及资源分布情况,总结了火焰兰属与近缘属... 详细信息

杂交育种是兰花资源开发和利用的重要手段。火焰兰属(Renanthera)植物杂交亲和力较好,常进行属间杂交,也是研究植物远缘杂交障碍的重要研究材料之一。本研究简述了火焰兰属植物种植资源基本特征及资源分布情况,总结了火焰兰属与近缘属杂交育种与杂交组合登录概况,指出火焰兰属植物存在幼苗更新率较低、分子研究水平较低等问题,提出了重视亲本的选择、加强基础育种研究、扩大与近缘属间的杂交育种工作及加大属间杂交后代在分子水平的深入研究等促进火焰兰属间育种的相关措施。

关键词：火焰兰属近缘属杂交育种亲本选择种质资源分子研究

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Speech endpoint detection in low-SNRs environment based on perception spectrogram structure boundary parameter

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Chinese Journal of Acoustics 2014年第4期33卷 428-440页

作者： WU Di ZHAO heming HUANG Chengwei xiao Zhongzhe ZHANG xiaojun XU Yishen TAO Zhi College of Physics Optoelectronics and EnergySoochow University School of Electronic Information Soochow University

The Perception Spectrogram Structure Boundary（PSSB）parameter is proposed for speech endpoint detection as a preprocess of speech or speaker *** first a hearing perception speech enhancement is carried *** the two-dimensional enhancement is performed upon the sound spectrogram according to the difference between the determinacy distribution characteristic of speech and the random distribution characteristic of *** a decision for endpoint was made by the PSSB *** results show that,in a low SNR environment from-10 dB to 10 dB,the algorithm proposed in this paper may achieve higher accuracy than the extant endpoint detection *** detection accuracy of 75.2%can be reached even in the extremely low SNR at-10 *** it is suitable for speech endpoint detection in low-SNRs environment.

关键词： Speech endpoint detection in low-SNRs environment based on perception spectrogram structure boundary parameter

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Comparison Study on Anode Materials of Lithium-Ion Battery Applied in Tibet

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Journal of Power and Energy Engineering 2019年第12期7卷 42-50页

作者： Guangzhou Zhang heming Deng Buqiong xiao Tianyu Hou Yue Song Nima Shida Hang Qi Anat Deepatana Shun Tang State Grid Electric Power Research Institute Wuhan China 430074 Electric Power Research Institute of Xizang Electric Power Co. Ltd. Lhasa China Faculty of Engineering Burapha University Chon Buri Thailand State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

Lithium-ion battery is facing the capacity fade in cold area. It reports in this paper to improve the temperature-tolerance using the novel materials in the battery design. Mesophase carbon microspheres (MG11) composed of 2H + 3R graphite phase with more uniform size were used as anode material and a new binder (WRA268) was used. The tests results show that at 0°C, MG11 using conventional binder (styrene butadiene rubber, SBR) attains 66% of reversible capacity retention rate, and synthetic graphite (FSN-1) using WRA268 as binder attains 76.9% of reversible capacity retention rate, but it attains 34% for the FSN-1 using SBR as the binder. These results show that MG11-WRA268 is promising materials using for battery in cold areas such as Tibet.

关键词： Lithium-Ion Battery Anode Cold Area Energy Storage

The potential function of transhiatal esophagectomy in the treatment of esophageal carcinoma

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The Chinese-German Journal of Clinical Oncology 2008年第1期7卷 31-34页

作者： Xiufeng Cao Jian xiao Shan Wang Bichao Wu Zhihua Huang Shuiqing Huang heming Wang Yisheng Li Bin Zhu The Third Clinical Teaching Hospital of Nanjing Medical University Nanjing 210006 China Chest Surgery of Cancer Hospital in Yancheng City Yancheng 224002 China

Objective： To analyze the results and introduce the experiences of transhiatal esophagectomy in combined with different synthetic therapy. Methods： Seventy-one patients with esophageal carcinoma, median age was 62, 40 of stage Ⅰ, 26 of Ⅱa, 4 of stage Ⅱb, 1 of stage Ⅳ, were treated with transhiatal esophagectomy. 9 and 17 patients were treated with preoperative radiotherapy （4000 cGy） and postoperative adjuvant radiotherapy （6000 cGy） respectively; 5 patients were treated with preoperative chemotherapy. Results： The postoperative 1, 3 and 5 years survival rates were 100%, 91.43%, and 86.21% for stage Ⅰ; 92%, 83.33%, and 57.14% for stage Ⅱa; 75%, 50%, and 50% for stage Ⅱb; 100%, 0, and 0 for stag Ⅳ and 95.71%, 86.89%, and 71.70% as a whole, respectively. The incidence of complications was 12.68%. Conclusion： Transhiatal esophagectomy combined with chemotherapy or radiotherapy may be beneficial to patients with esophageal carcinoma at stage Ⅱa or earlier who can＇t tolerate or need not be treated by transthoracic esophagectomy.

关键词： esophageal carcinoma transhiatal esophagectomy synthetic therapy

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