2022年中央一号文件《中共中央国务院关于做好2022年全面推进乡村振兴重点工作的意见》明确要求大力推进数字农业建设,推进智慧农业发展;2022年12月23日至24日中央农村工作会议上习近平总书记指出“产业振兴是乡村振兴的重中之重,要落...2022年中央一号文件《中共中央国务院关于做好2022年全面推进乡村振兴重点工作的意见》明确要求大力推进数字农业建设,推进智慧农业发展;2022年12月23日至24日中央农村工作会议上习近平总书记指出“产业振兴是乡村振兴的重中之重,要落实产业帮扶政策,做好‘土特产’文章,依托农业农村特色资源,向开发农业多种功能、挖掘乡村多元价值要效益,向一二三产业融合发展要效益,强龙头、补链条、兴业态、树品牌,推动乡村产业全链条升级,增强市场竞争力和可持续发展能力”。本文深刻领会习近平总书记、中央一号文件、中共浙江省委十五届二次全会精神,通过深入总结嘉兴与丽水近二十年开展“山海协作”的成功经验,并针对嘉兴与丽水联动发展特色农业产业链目前遇到的种养技术、销售模式、专家团队、高技能人才等瓶颈,提出构建“嘉兴农产品专业市场与丽水种养基地联动发展特色农业产业链的‘W2F+B2M’(Wholesale to Farmer+Business to Member,即嘉兴农产品专业市场与丽水种养基地+嘉兴专业市场商户与商户的会员联动)模式”,进一步完善嘉兴与丽水特色农业产业链的联动发展机制,助推嘉兴与丽水共同富裕。展开更多
This paper presents an advanced control strategy for DC-DC buck converters utilizing Non-Minimal State Space (NMSS) representation combined with Proportional-Integral-Plus (PIP) control, optimized through Linear Quadr...This paper presents an advanced control strategy for DC-DC buck converters utilizing Non-Minimal State Space (NMSS) representation combined with Proportional-Integral-Plus (PIP) control, optimized through Linear Quadratic Regulator (LQR) design. The proposed approach leverages NMSS to eliminate the need for state observers, enhancing robustness against model mismatch and improving overall system performance. The PIP controller extends traditional PI control by incorporating additional dynamic feedback. Experimental results demonstrate that the NMSS-PIP-LQR controlled buck converter achieves excellent dynamic performance. The design procedure is fully documented, and microcontroller implementation issues are discussed.展开更多
采用Gleeble-3500对铁素体/马氏体(F/M)钢的热成形规律进行了研究。基于F/M钢热压缩应力-应变曲线,建立了F/M钢动态材料模型(dynamic material model,DMM)热加工图,并通过金相分析对热加工图进行了验证。结合热加工图和金相分析,研究了...采用Gleeble-3500对铁素体/马氏体(F/M)钢的热成形规律进行了研究。基于F/M钢热压缩应力-应变曲线,建立了F/M钢动态材料模型(dynamic material model,DMM)热加工图,并通过金相分析对热加工图进行了验证。结合热加工图和金相分析,研究了F/M钢热成形过程中的组织变化,给出了不同情况下的热加工参数:如后续需要继续大变形加工,可采用850℃、应变速率0.01 s^-1作为加工参数,该参数可生成细小、均匀且易加工的铁素体组织;如后续对F/M钢有较高的强度要求,可选取1150℃、应变速率10 s^-1作为加工参数,该参数可生成细小、均匀且高强度的马氏体。展开更多
Relationships between fluorescence parameters and membrane lipid peroxidation in leaves of indica and japonica rice (Oryza sativa L.) during later growth stage were studied under chilling temperature and strong light ...Relationships between fluorescence parameters and membrane lipid peroxidation in leaves of indica and japonica rice (Oryza sativa L.) during later growth stage were studied under chilling temperature and strong light stress conditions. Results showed that D1 protein contents of PSⅡ in photosynthetic apparatus dropped, the generation of antheraxanthin (A) and zeaxanthin (Z) of xanthophyll cycle were inhibited partly, PSⅡ photochemical efficiency (F v/F m)and non-photochemical quenching (q N) were also decreased obviously. In addition, endogenous active oxygen scavenger—superoxide dismutase (SOD) reduced, superoxide anion radical (O -· 2) and malondialdehyde (MDA) accumulated, as a result, photooxidation of leaves occurred under chilling temperature and strong light stress conditions. Obvious differences in the changes of the above mentioned physiological parameters between indica and japonica rice were observed. Experiments in leaves treated with inhibitors under chilling temperature and strong light conditions showed that indica rice was more sensitive to chilling temperature with strong light and subjected to photooxidation more than japonica rice. Notable positive correlation between D1 protein contents and F v/F m or (A+Z)/(A+Z+V), and a marked negative correlation between F v/F m and MDA contents were obtained by regression analysis in indica and japonica rice during chilling temperature and strong light conditions. According to the facts mentioned above, it was inferred that PSⅡ photochemical efficiency(F v/F m) was the key index to forecast for the prediction of photooxidation under stress circumstances and the physiological basis were the synthetic capacity of D1 protein and the protection of xanthophyll cycle.展开更多
文摘2022年中央一号文件《中共中央国务院关于做好2022年全面推进乡村振兴重点工作的意见》明确要求大力推进数字农业建设,推进智慧农业发展;2022年12月23日至24日中央农村工作会议上习近平总书记指出“产业振兴是乡村振兴的重中之重,要落实产业帮扶政策,做好‘土特产’文章,依托农业农村特色资源,向开发农业多种功能、挖掘乡村多元价值要效益,向一二三产业融合发展要效益,强龙头、补链条、兴业态、树品牌,推动乡村产业全链条升级,增强市场竞争力和可持续发展能力”。本文深刻领会习近平总书记、中央一号文件、中共浙江省委十五届二次全会精神,通过深入总结嘉兴与丽水近二十年开展“山海协作”的成功经验,并针对嘉兴与丽水联动发展特色农业产业链目前遇到的种养技术、销售模式、专家团队、高技能人才等瓶颈,提出构建“嘉兴农产品专业市场与丽水种养基地联动发展特色农业产业链的‘W2F+B2M’(Wholesale to Farmer+Business to Member,即嘉兴农产品专业市场与丽水种养基地+嘉兴专业市场商户与商户的会员联动)模式”,进一步完善嘉兴与丽水特色农业产业链的联动发展机制,助推嘉兴与丽水共同富裕。
文摘This paper presents an advanced control strategy for DC-DC buck converters utilizing Non-Minimal State Space (NMSS) representation combined with Proportional-Integral-Plus (PIP) control, optimized through Linear Quadratic Regulator (LQR) design. The proposed approach leverages NMSS to eliminate the need for state observers, enhancing robustness against model mismatch and improving overall system performance. The PIP controller extends traditional PI control by incorporating additional dynamic feedback. Experimental results demonstrate that the NMSS-PIP-LQR controlled buck converter achieves excellent dynamic performance. The design procedure is fully documented, and microcontroller implementation issues are discussed.
文摘采用Gleeble-3500对铁素体/马氏体(F/M)钢的热成形规律进行了研究。基于F/M钢热压缩应力-应变曲线,建立了F/M钢动态材料模型(dynamic material model,DMM)热加工图,并通过金相分析对热加工图进行了验证。结合热加工图和金相分析,研究了F/M钢热成形过程中的组织变化,给出了不同情况下的热加工参数:如后续需要继续大变形加工,可采用850℃、应变速率0.01 s^-1作为加工参数,该参数可生成细小、均匀且易加工的铁素体组织;如后续对F/M钢有较高的强度要求,可选取1150℃、应变速率10 s^-1作为加工参数,该参数可生成细小、均匀且高强度的马氏体。
文摘Relationships between fluorescence parameters and membrane lipid peroxidation in leaves of indica and japonica rice (Oryza sativa L.) during later growth stage were studied under chilling temperature and strong light stress conditions. Results showed that D1 protein contents of PSⅡ in photosynthetic apparatus dropped, the generation of antheraxanthin (A) and zeaxanthin (Z) of xanthophyll cycle were inhibited partly, PSⅡ photochemical efficiency (F v/F m)and non-photochemical quenching (q N) were also decreased obviously. In addition, endogenous active oxygen scavenger—superoxide dismutase (SOD) reduced, superoxide anion radical (O -· 2) and malondialdehyde (MDA) accumulated, as a result, photooxidation of leaves occurred under chilling temperature and strong light stress conditions. Obvious differences in the changes of the above mentioned physiological parameters between indica and japonica rice were observed. Experiments in leaves treated with inhibitors under chilling temperature and strong light conditions showed that indica rice was more sensitive to chilling temperature with strong light and subjected to photooxidation more than japonica rice. Notable positive correlation between D1 protein contents and F v/F m or (A+Z)/(A+Z+V), and a marked negative correlation between F v/F m and MDA contents were obtained by regression analysis in indica and japonica rice during chilling temperature and strong light conditions. According to the facts mentioned above, it was inferred that PSⅡ photochemical efficiency(F v/F m) was the key index to forecast for the prediction of photooxidation under stress circumstances and the physiological basis were the synthetic capacity of D1 protein and the protection of xanthophyll cycle.
