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A Computer Program for Automatic Watering Based on Potential Evapotranspiration by Penman Method and Predicted Leaf Area in Miniature Pot Rose Production

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Agricultural Sciences in China 2010年第3期9卷 370-377页

作者： yu wen-jin Kitamura Ryo Kato Katsuhiko LI Lian-hua Fukui Hirokazu Agricultural College Guangxi University Nanning 530004 P.R.China The United Graduate School of Agricultural Science Gifu University Gifu 5011193 Japan Faculty of Applied Biological Sciences Gifu University Gifu 5011193 Japan Gifu Prefectural Center for Agricultural Sciences Gifu 5011152 Japan

In this study, we developed a computer program for automatic prediction of watering time point by considering the environmental factors such as solar radiation, air temperature and relative humidity based on the multiple linear regression equation of leaf area and Penman Method. The experiments were carried out for a year in two watering experimental plots, one of which was controlled by pF value, and the other by the computer program. After comparing the results of the two plots, the following findings were obtained. In the computer program plot, the observed and predicted values of both leaf area and evapotranspiration indicated significant correlation at the 1% level, which suggested that the computer program had high prediction accuracy. In addition, no significant difference was observed between the two experimental plots with respects to the plant height, plant diameter, leaf area, leaf number, fresh weight, and dry weight, which demonstrated that the plants in the computer program plot had normal growth. On the other hand, although the number of flower buds and flowering shoots showed higher values at the end of certain cultivations in the computer program plot than those in pF value plot, we proposed that it was due to the effect of cumulative daily solar radiation in the greenhouse, rather than the watering. Thus, we have reached the conclusion that the computer program for automatic prediction of watering time point developed by this study has high applicability in miniature pot rose production.

关键词： automatic watering leaf area miniature pot rose Penman Method program

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抗辣椒青枯病的糖类筛选及抗性机制研究

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南方农业学报 2024年第6期55卷 1653-1661页

作者：高于岚高连宝傅慧珍汪志伟成善汉朱国鹏于文进海南大学热带农林学院/海南省热带园艺作物品质调控重点实验室海南海口570228 海南大学三亚南繁研究院海南三亚572025 广西大学农学院广西南宁530004

【目的】筛选抗辣椒青枯病的糖类,并分析其抗性机制,为辣椒青枯病防治药剂的开发提供理论依据。【方法】以蔗糖、麦芽糖、L-阿拉伯糖、D-乳糖、D-棉子糖、D-果糖、D-半乳糖、D-葡萄糖、D-核糖和D-木糖10种糖为试验材料,供试菌株为假茄... 详细信息

【目的】筛选抗辣椒青枯病的糖类,并分析其抗性机制,为辣椒青枯病防治药剂的开发提供理论依据。【方法】以蔗糖、麦芽糖、L-阿拉伯糖、D-乳糖、D-棉子糖、D-果糖、D-半乳糖、D-葡萄糖、D-核糖和D-木糖10种糖为试验材料,供试菌株为假茄科雷尔氏菌(Ralstonia pseudosolanacearum)RS03,分析青枯菌对糖的同化作用,采用幼苗试验和室内盆栽试验筛选对辣椒青枯病防治效果最佳的糖。通过抗菌活性、致病性和趋化性测定分析糖与青枯菌的相互作用;接种青枯菌后第2、4、6和8 d,测定经糖处理的辣椒茎部过氧化物酶(POD)、苯丙氨酸解氨酶(PAL)和多酚氧化酶(PPO)等防御酶活性。【结果】10种糖中,L-阿拉伯糖、D-乳糖和D-棉子糖不被青枯菌同化,选择其进行后续试验;幼苗试验结果表明,L-阿拉伯糖和D-棉子糖均显著降低辣椒青枯病的发病率(P<0.05,下同);室内盆栽试验结果表明,L-阿拉伯糖对辣椒青枯病的防治效果最佳,达90.67%。分析L-阿拉伯糖与青枯菌的相互作用,结果表明,L-阿拉伯糖对青枯菌无抑菌作用且对其致病性没有影响,青枯菌对L-阿拉伯糖无趋化性。防御酶活性检测结果表明,L-阿拉伯糖处理能显著提高辣椒茎部POD、PAL和PPO活性,POD和PPO活性均随着青枯菌接种时间的推移呈增长趋势,在接种8 d后达峰值,分别为571.11和125.33 U/g;而PAL活性呈波动变化趋势,接种后第4 d达峰值,为24.13 U/g。【结论】L-阿拉伯糖对辣椒青枯病的防治效果最佳,其能通过提高植株体内防御酶活性来增强辣椒对青枯病的抗性,具有开发成新型辣椒青枯病防治药剂的潜力。

关键词：辣椒青枯病糖筛选防御酶活性

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激素和蔗糖对番茄子叶节位侧芽萌发与生长的影响

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南方农业学报 2024年第2期55卷 509-519页

作者：吴元彩王东登郑旭阳李永强王鹏钟川于文进广西大学农学院广西南宁530004

【目的】研究激素和蔗糖对番茄子叶节位侧芽萌发和生长的影响,为培育番茄接穗双头苗提供理论依据。【方法】以子叶节位易萌发侧芽番茄TZ1502和不易萌发侧芽番茄TR1525为材料,通过比较打顶后内源激素含量、相关基因表达量变化,以及外源... 详细信息

【目的】研究激素和蔗糖对番茄子叶节位侧芽萌发和生长的影响,为培育番茄接穗双头苗提供理论依据。【方法】以子叶节位易萌发侧芽番茄TZ1502和不易萌发侧芽番茄TR1525为材料,通过比较打顶后内源激素含量、相关基因表达量变化,以及外源激素和蔗糖喷施对子叶节位侧芽萌发生长的影响,从激素水平和基因表达的角度探讨番茄子叶节位侧芽萌发的调控机理。【结果】打顶后2种番茄的IAA含量和生长素转运基因PIN1的相对表达量均先降低后增加,PIN1的相对表达量在TZ1502中高于TR1525;细胞分裂素合成基因IPT2的相对表达量在TZ1502打顶第3 d增加到最大值,而在TR1525中的相对表达量无显著变化(P>0.05);芽内负调控因子BRC1在TR1525中的相对表达量增加,且高于在TZ1502中的相对表达量。TZ1502侧芽萌发能力强于TR1525,表明打顶后侧芽萌发与IAA和CKs含量及其相关基因的表达有关,同时也与BRC1基因的表达有关。GR24和NAA通过下调IAA3和PIN1基因的表达降低IAA含量,下调IPT2和IPT3基因的表达降低CKs含量,以及上调BRC1基因表达;TIBA通过抑制PIN1基因的表达、上调BRC1基因表达,进而抑制侧芽萌发和生长。相反,蔗糖通过上调PIN1、IAA3、IPT2和IPT3基因的表达增加IAA和CKs的含量,抑制BRC1基因的表达,进而促进子叶节位侧芽萌发和生长。【结论】打顶后番茄TZ1502的子叶节位侧芽萌发能力比TR1525强。番茄子叶节位侧芽萌发与其基因型和激素相关,即IAA3和PIN1基因表达上调且IAA和CKs含量增加、BRC1基因表达下调促进侧芽萌发。培育番茄接穗双头苗,蔗糖外源处理促进子叶节位侧芽萌发和生长,调控作用与CKs的积累效应有关。

关键词：番茄子叶节位侧芽植物激素蔗糖

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UAV-assisted cooperative offloading energy efficiency system for mobile edge computing

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Digital Communications and Networks 2024年第1期10卷 16-24页

作者： Xue-Yong yu wen-jin Niu Ye Zhu Hong-Bo Zhu Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and Telecommunications Nanjing210003China Engineering Research Centerof Health Service System Based on Ubiquitous Wireless Networks Ministry of EducationNanjng Universityof Posts and Telecommunications Nanjing210003China

Reliable communication and intensive computing power cannot be provided effectively by temporary hot spots in disaster areas and complex terrain ground *** this has greatly developed the application and integration of UAV and Mobile Edge Computing(MEC)to the Internet of Things(loT).However,problems such as multi-user and huge data flow in large areas,which contradict the reality that a single UAV is constrained by limited computing power,still *** to allowing UAV collaboration to accomplish complex tasks,cooperative task offloading between multiple UAVs must meet the interdependence of tasks and realize parallel processing,which reduces the computing power consumption and endurance pressure of *** the computing requirements of the user terminal,delay constraint of a computing task,energy constraint,and safe distance of UAV,we constructed a UAV-Assisted cooperative offloading energy efficiency system for mobile edge computing to minimize user terminal energy ***,the resulting optimization problem is originally nonconvex and thus,difficult to solve *** tackle this problem,we developed an energy efficiency optimization algorithm using Block Coordinate Descent(BCD)that decomposes the problem into three convex ***,we jointly optimized the number of local computing tasks,number of computing offloaded tasks,trajectories of UAV,and offloading matching relationship between multi-UAVs and multiuser *** results show that the proposed approach is suitable for different channel conditions and significantly saves the user terminal energy consumption compared with other benchmark schemes.

关键词： Computation offloading Internet of things(IoT) Mobile edge computing(MEC) Block coordinate descent(BCD)

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新形势下如何高效开展森林防灭火宣传教育浅析

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森林防火 2024年第2期42卷 28-30页

作者：董飞赵丹李镇铧于文金王明竹海阳市林业局山东海阳265100

为构建坚实的森林防火屏障,社会各界实施多维宣传策略。主流媒体利用其公信力与传播力,通过多平台宣传森林防火法规与案例,营造正面舆论环境。各部门联合行动,运用短信、公交电视等工具,及时发布预警信息,形成联动宣传效应。“六进”活... 详细信息

为构建坚实的森林防火屏障,社会各界实施多维宣传策略。主流媒体利用其公信力与传播力,通过多平台宣传森林防火法规与案例,营造正面舆论环境。各部门联合行动,运用短信、公交电视等工具,及时发布预警信息,形成联动宣传效应。“六进”活动深化社会各层面教育,特别是在校园推广“小手拉大手”,由儿童带动家庭,提升全民防火意识。重点区域加密宣传配置,结合流动宣传车与农村广播,确保宣传无死角。对重点人群实行点对点精准宣教,同时加强施工人员管理,从源头防控火灾风险。

关键词：森林防灭火宣传教育社会面阵地式点对点

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A load-balanced minimum energy routing algorithm for Wireless Ad Hoc Sensor Networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第4期7卷 502-506页

作者： CAI wen-yu jin Xin-yu ZHANG yu CHEN Kang-sheng Department of Information Science ＆ Electronic Engineering Zhejiang University Hangzhou 310027 China

Wireless Ad Hoc Sensor Networks (WSNs) have received considerable academia research attention at present. The energy-constraint sensor nodes in WSNs operate on limited batteries, so it is a very important issue to use energy efficiently and reduce power consumption. To maximize the network lifetime, it is essential to prolong each individual node’s lifetime through minimizing the transmission energy consumption, so that many minimum energy routing schemes for traditional mobile ad hoc network have been developed for this reason. This paper presents a novel minimum energy routing algorithm named Load-Balanced Minimum Energy Routing (LBMER) for WSNs considering both sensor nodes’ energy consumption status and the sensor nodes’ hierarchical congestion levels, which uses mixture of energy balance and traffic balance to solve the problem of “hot spots” of WSNs and avoid the situation of “hot spots” sensor nodes using their energy at much higher rate and die much faster than the other nodes. The path router established by LBMER will not be very congested and the traffic will be distributed evenly in the WSNs. Simulation results verified that the LBMER performance is better than that of Min-Hop routing and the existing minimum energy routing scheme MTPR (Total Transmission Power Routing).

关键词： Wireless Ad Hoc Sensor Networks (WSNs) Load-Balanced Minimum Energy Routing (LBMER)

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Effects of Extreme Air Temperature and Humidity on the Insecticidal Expression Level of Bt Cotton

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Journal of Integrative Agriculture 2012年第11期11卷 1836-1844页

作者： CHENyuan wen yu-jin CHEN yuan John Tom Cothren ZHANG Xiang WANG Yong-hui WilliamA Payne CHEN De-hua Ecology and Cultivation in Middle and Lower Reaches of Yangtse River Ministry of Agriculture/Agricultural College Yangzhou University Yangzhou 225009 P.R.China Department of Soil and Crop Sciences Texas A&M University College Station TX77843 USA Key Laboratory of Crops Genetics and Physiology Jiangsu Province/Agricultural College Yangzhou University Yangzhou 225009 P.R. China Norman Borlaug Institute for International Agriculture Texas A&M University College Station TX77843 USA

The higher survival rates of Helicoverpa amigera larvae were usually observed after adverse climate which was related to extreme temperature （T） and relative humidity （RH） stresses in transgenic Bacillus thuringiensis （Bt） cotton. The unstable resistance of Bt cotton to bollworms has been correlated with the reduced expression of CrylAc δ-endotoxin. The objective of this study was to investigate the effects of combined temperature and relative humidity stresses on the leaf CrylAc insecticidal protein expression during critical developmental stages. The study was undertaken on two transgenic cotton cultivars that share same parental background, Sikang 1 （a conventional cultivar） and Sikang 3 （a hybrid cultivar）, during the 2007 and 2008 growing seasons at the Yangzhou University Farm, Yangzhou, China. The study was arranged with two factors that consisted of temperature （two levels） and relative humidity （three levels）. The six T/RH treatments were 37℃/95%, 37℃/70%, 37℃/50%, 18℃/95%, 18℃/70%, and 18℃/50%. In 2007, the six treatments were imposed to the plants at peak flowering stage for 24 h; in 2008, the six treatments were applied to the plants at peak square, peak flowering, and peak boll stages for 48 h. The results of the study indicated that the leaf insecticidal protein expression in CrylAc was significantly affected by extreme temperature only at peak flowering stage, and by both extreme temperature and relative humidity during boll filling stage. The greatest reductions were observed when the stresses were applied at peak boll stage. In 2008, after 48 h stress treatment, the leaf Bt endotoxin expression reduced by 25.9-36.7 and 23.6-40.5% at peak boll stage, but only by 14.9-26.5 and 12.8-24.0% at peak flowering stage for Sikang 1 and Sikang 3, respectively. The greatest reduction was found under the low temperature combined with low relative humidity condition for both years. It is believed that the temperature and relative humidity stresses may be attribut

关键词： Bt cotton high temperature low temperature relative humidity CryIAc protein

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The effects of high temperature level on square Bt protein concen-tration of Bt cotton

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Journal of Integrative Agriculture 2015年第10期14卷 1971-1979页

作者： WANG Jun CHEN yuan YAO Meng-hao LI yuan wen yu-jin CHEN yuan ZHANG Xiang CHEN De-hua Jiangsu Provincial Key Laboratory of Crops Genetics and Physiology Yangzhou University Yangzhou 225009 P.R. China Department of Soil and Crop Sciences Texas A&M University College Station TX77843 USA Syngenta Biotechnology Inc. Carry NC 27519 USA

Higher boll worm survival rates were detected after high temperature presented during square period in Bt cotton. The objective of this study was to investigate the effects of high temperature level on the Bt efficacy of two different types of Bt cotton cultivars at squaring stage. During the 2011 to 2013 cotton growth seasons, high temperature treatments ranged from 34 to 44°C in climate chambers, and field experiments under high temperature weather with various temperature levels were conducted to investigate the effects of the high temperature level on square Bt protein concentration and nitrogen metabolism. The climate chamber experiments showed that the square insecticidal protein contents reduced after 24 h elevated temperature treatments for both cultivars, whereas significant declines of the square insecticidal protein contents were detected at temperature 〉38°C, and only slightly numerical reductions were observed when temperature below 38°C. Similar high temperature responses were also observed at the two field experimental sites in 2013. Correspondingly, high temperature below 38°C seems have little effect on the square amino acid concentrations, soluble protein contents, glutamic-pyruvic transaminase（GPT） and glutamic-oxalacetic transaminase（GOT） activities as well as protease and peptidase activities; however, when the temperature was above 38°C, reduced soluble protein contents, enhanced amino acid concentrations, decreased GPT and GOT activities, bolstered protease and peptidase activities in square were detected. In general, the higher the temperature is（〉38°C）, the larger the changes for the above compound contents and key enzymes activities of the square protein cycle. The findings indicated that the unstable insect resistance of the square was related to high temperature level during square stage.

关键词： Bt cotton square high temperature level stress Bt protein nitrogen metabolism

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Design study of charge-stripping scheme of heavy ion beams for HIAF-BRing

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Nuclear Science and Techniques 2024年第5期35卷 30-41页

作者： Jun-Jie Zhang Zhi-You Xu jin-Quan Zhang wen-wen Ge Liang-Ting Sun Huan-yu Zhao Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

Charge strippers play an essential role in heavy-ion accelerators by stripping the projectile ions to higher charge states to enhance the acceleration efficiency downstream of the *** the high-energy mode of the booster ring(BRing)of the high-intensity heavy-ion accelerator facility,the pre-accelerated ions from the iLinac will be stripped by a carbon foil to higher charge states and then injected into the *** key parameters of the stripper and stripped ions were calculated,and the influence of stripping on the beam quality was *** get high stripping efficiencies,the foil thicknesses and resultant charge state distributions for the typical ions were determined by the code *** equilibrium thickness was obtained for the U beam,while the stripper thicknesses for the Xe and Kr beams were determined based on a compromise between the stripped charge states and the stripping *** energy loss,energy straggling,and emittance growth due to stripping have a non-negligible impact on the transport of the stripped beams and the injection of the ***,these parameters were simulated by *** addition,the foil’s temperature evolution,which greatly affects the foil lifetime,was simulated by *** maximum temperature of the foil bombarded by the U and Xe beams with the nominal parameters will exceed the safe value in terms of the impact of evaporation on the foil’s *** the foil temperature constraint,the highest tolerable beam intensity and the injected ion number into the ring were derived for different beam *** results of this paper will present important reference data for the optimization design and commissioning of the beamline and injection to the BRing for the stripped ions.

关键词： High-intensity heavy-ion accelerator facility Charge stripper Energy spread Thermal analysis Emittance growth Injection turns

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Local resonance metamaterial-based integrated design for suppressing longitudinal and transverse waves in fluid-conveying pipes

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Applied Mathematics and Mechanics(English Edition) 2024年第10期45卷 1821-1840页

作者： Donghai HAN Qi JIA yuanyu GAO Qiduo jin Xin FANG Jihong wen Dianlong yu Laboratory of Science and Technology on Integrated Logistics Support National University of Defense TechnologyChangsha 410073China College of Intelligence Science and Technology National University of Defense TechnologyChangsha 410073China

To solve the problem of low broadband multi-directional vibration control of fluid-conveying pipes,a novel metamaterial periodic structure with multi-directional wide bandgaps is ***,an integrated design method is proposed for the longitudinal and transverse wave control of fluid-conveying pipes,and a novel periodic structure unit model is constructed for vibration *** on the bandgap vibration reduction mechanism of the acoustic metamaterial periodic structure,the material parameters,structural parameters,and the arrangement interval of the periodic structure unit are *** finite element method(FEM)is used to predict the vibration transmission characteristics of the fluid-conveying pipe installed with the vibration reduction periodic ***,the wave/spectrum element method(WSEM)and experimental test are used to verify the calculated results ***,the vibration attenuation characteristics of the structure under different conditions,such as rubber material parameters,mass ring material,and fluid-structure coupling effect,are *** results show that the structure can produce a complete bandgap of 46 Hz-75 Hz in the low-frequency band below 100 Hz,which can effectively suppress the low broadband vibration of the fluidconveying *** addition,a high damping rubber material is used in the design of the periodic structure unit,which realizes the effective suppression of each formant peak of the pipe,and improves the vibration reduction effect of the fluid-conveying ***,the structure has the effect of suppressing both bending vibration and longitudinal vibration,and effectively inhibits the transmission of transverse waves and longitudinal waves in the *** research results provide a reference for the application of acoustic metamaterials in the multi-directional vibration control of fluid-conveying pipes.

关键词： fluid-conveying pipe acoustic metamaterial multi-directional vibration reduction local resonance

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