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苏打盐碱胁迫对水稻光合特性及产量的影响

作物杂志 2024年第1期 193-203页

作者：王晓蕾张云鹤牟金猛高大鹏耿艳秋曹译文卢芬关政闻邵玺文郭丽颖吉林农业大学吉林长春130118

以水稻品种长白9和吉农大667为供试材料,采用盆栽法,设置普通黑土(CK)、轻度(LS)、中度(MS)和重度盐碱(SS)4个处理,测定水稻的干物质、叶面积、产量、叶片叶绿素含量、气体交换参数以及叶绿素荧光参数等指标,探究不同程度苏打盐碱胁迫... 详细信息

以水稻品种长白9和吉农大667为供试材料,采用盆栽法,设置普通黑土(CK)、轻度(LS)、中度(MS)和重度盐碱(SS)4个处理,测定水稻的干物质、叶面积、产量、叶片叶绿素含量、气体交换参数以及叶绿素荧光参数等指标,探究不同程度苏打盐碱胁迫下水稻光合生理的响应机制。结果表明,随着盐碱程度的加剧,水稻叶面积、叶绿素含量、光合气体交换参数中净光合速率(P_(n))、气孔导度(G_(s))、干物质和产量均显著下降,胞间CO_(2)浓度(C_(i))显著上升。叶绿素荧光动力学曲线中K点的WK和J点的VJ以及QA初始还原速度(Mo)均显著上升,水稻叶片性能指数(PIABS)显著降低,量子产额与效率(φPo、φRo、ψEo)随盐碱程度的加剧呈下降趋势,热耗散比率(φDo)呈上升趋势。与CK相比,苏打盐碱胁迫下长白9品种2年的产量平均下降了16.85%~48.85%,吉农大667下降了17.00%~53.10%;水稻的产量构成中结实率、有效穗数和穗粒数等均显著下降。

关键词：水稻苏打盐碱胁迫光合作用光系统Ⅱ 叶绿素荧光

Noninvasive identificational diagnosis of diabetic nephropathy and non-diabetic renal disease based on clinical characteristics of Traditional Chinese Medicine symptom pattern and conventional medicine

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Journal of Traditional Chinese Medicine 2023年第3期43卷 588-593页

作者： QU Yilun CHENG Haimei WANG Qian LI Shuang DUAN Shuwei FENG Zhe LI Weizhen JIANG Shuangshuang YANG Hongtao MAO Yonghui geng yanqiu LI Jijun LIU Yuning TIAN Jinzhou LIU Hongfang DONG Zheyi CHEN Xiangmei Department of Nephrology First Medical Center of Chinese PLA General HospitalNephrology Institute of the Chinese People's Liberation ArmyState Key Laboratory of Kidney DiseasesNational Clinical Research Center for Kidney DiseasesBeijing Key Laboratory of Kidney Disease ResearchBeijing 100853China Department of Nephrology The First Affiliated Hospital of Tianjin University of Traditional Chinese MedicineTianjin 300381China Department of Nephrology Beijing HospitalBeijing 100730China Department of Nephrology the Third Medical Center of PLA General HospitalBeijing 100039China Department of Nephrology the Forth Medical Center of PLA General HospitalBeijing 100048China Department of Nephrology Dongzhimen Hospital of Beijing University of Traditional Chinese MedicineBeijing 100700China Three Departments of Encephalopathy Dongzhimen Hospital of Beijing University of Traditional Chinese MedicineBeijing 100700China Department of Endocrinology Dongzhimen Hospital of Beijing University of Traditional Chinese MedicineBeijing 100700China

OBJECTIVE:To study the clinical characteristics relating to differential diagnosis of diabetic nephropathy(DN) and non-diabetic renal disease(NDRD).METHODS:The subjects were patients with type 2 diabetes mellitus(T2DM) complicated with chronic kidney disease(CKD).Western medical history data and Traditional Chinese Medicine(TCM) symptom pattern were collected,and logistic regression was used to ***:Blood deficiency pattern [odds ratio(OR) = 2.269,P = 0.017] and Qi stagnation pattern(OR = 1.999,P = 0.041) are independently related to ***:TCM factors blood deficiency pattern and Qi stagnation pattern are relating to differential diagnosis of DN and NDRD.

关键词： diabetes mellitus type 2 renal insufficiency chronic diabetic nephropathies non-diabetic renal disease syndrome complex

Mixed Dead-time Effect Suppression Strategy for Modular Multilevel Converters

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1075-1084页

作者： Zhi geng Minxiao Han School of Electrical and Electronic Engineering North China Electric Power UniversityBeijing 102206China IEEE

Dead time is necessary for the coupled power switches to prevent shoot-through,especially in the modular multilevel converters(MMCs)with a large number of power *** paper proposes a dead-time effect suppression strategy for MMCs with nearest level *** operational principles of MMCs are first *** to the operational features of MMCs,the method that removes a switching signal from the coupled switches and the reduced switching frequency voltage balancing algorithms(RSFVBAs)are mixed in the proposed *** the intervals that are furthest away from the zerocrossing points(ZCP)of arm currents,the single switching signal method can completely eliminate the dead-time effect(DTE).Alternatively,the DTE is suppressed by the RSFVBA in intervals that are close to the *** the combination of the two methods,the dependence of the DTE suppression method on currents is reduced and the influences of ZCP are also released without degrading the normal operation performance of ***,the output performance of MMCs is improved and the voltage stress on the arm inductor dramatically ***,the validation of the method is verified by the simulation results with the professional tool Matlab/Simulink.

关键词： Dead-time effect modular multilevel converters switching frequency voltage balancing algorithm

Boosting electrocatalytic nitrate reduction to ammonia via Cu_(2)O/Cu(OH)_(2)heterostructures promoting electron transfer

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Nano Research 2024年第6期17卷 4898-4907页

作者： Jing geng Sihan Ji Anhui Province International Research Center on Advanced Building Materials School of Materials Science and Chemical EngineeringAnhui Jianzhu UniversityHefei 230601China Anhui Province Key Laboratory of Advanced Building Materials Anhui Jianzhu UniversityHefei 230601China School of Energy Materials and Chemical Engineering Hefei UniversityHefei 230601China

Electrocatalytic nitrate(NO_(3)^(−))reduction to ammonia(NH_(3))offers a viable approach for sustainable NH_(3)production and environmental ***(Cu)possesses a distinctive electronic structure,which can augment the reaction kinetics of NO_(3)^(−)and impede hydrogen evolution reaction(HER),rendering it a promising contender for the electrosynthesis of NH_(3)from NO_(3)^(−).Nevertheless,the role of Cu_(2)O in copper-based catalysts still requires further investigation for a more comprehensive ***,the Cu_(2)O/Cu(OH)_(2)heterostructures are successfully fabricated through liquid laser irradiation using CuO nanoparticles as a *** and theoretical researches reveal that Cu_(2)O/Cu(OH)_(2)heterostructure exhibits enhanced electrocatalytic performance for NO_(3)^(−)to NH_(3)because Cu(OH)_(2)promotes electron transfer and reduces the valence state of Cu active site in Cu_(2)***−0.6 V(*** hydrogen electrode(RHE)),the NH_(3)yield reaches its maximum at 1630.66±29.72μg·h^(−1)·mgcat^(−1),while the maximum of Faraday efficiency(FE)is 76.95%±5.51%.This study expands the technical scope of copper-based catalyst preparation and enhances the understanding of the electrocatalytic mechanism of NO_(3)^(−)to NH_(3).

关键词： Cu_(2)O/Cu(OH)_(2)heterostructures electron transfer ammonia synthesis electrocatalysts nitrate

Structural engineered living materials

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Nano Research 2024年第2期17卷 715-733页

作者： Yang geng Zian Jia Ling Li 635 Prices Fork Road Department of Mechanical EngineeringVirginia Polytechnic Institute and State UniversityBlacksburg VA24061USA

Biological structural materials not only exhibit remarkable mechanical properties but also often embody dynamic characteristics such as environmental responsiveness,autonomy,and self-healing,which are difficult to achieve in conventional engineering *** merging materials science,synthetic biology,and other disciplines,engineered living materials(ELMs)provide a promising solution to combine living organisms with abiotic components,thus facilitating the construction of functional“living”*** natural materials,ELMs possess vitality and hold immense application potential in areas such as medicine,electronics,and construction,captivating increasing research attention *** an emerging branch of ELMs,structural ELMs aim to mimic living biological structural materials by achieving desired mechanical performance while maintaining important“living”*** we summarize the recent progress and provide our perspectives for this emerging research *** first summarize the superiority of structural ELMs by reviewing biological structural materials and biomimetic material design ***,we provide a systematic discussion on the definition and classifications of structural ELMs,their mechanical performance,and physiological ***,we summarize some critical challenges faced by structural ELMs and highlight directions of future *** hope this review article can provide a timely summary of the state of the art and relevant perspectives for future development of structural ELMs.

关键词： structural materials engineered living materials(ELMs) structural ELMs composites mechanical properties

Optimizing urban block morphologies for net-zero energy cities:Exploring photovoltaic potential and urban design prototype

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Building Simulation 2024年第4期17卷 607-624页

作者： Xiaotian geng Dong Xie Zhonghua Gou School of Urban Design Wuhan UniversityWuhanChina

The morphology of urban areas plays a crucial role in determining solar potential,which directly affects photovoltaic capacity and the achievement of net-zero *** study focuses on the City of Melbourne to investigate the utilization of solar energy across different urban densities and proposes optimized *** analysis encompasses blocks with diverse population densities,examining medium and high-density *** utilizing a multi-objective genetic optimization approach,the urban morphology of these blocks is *** findings indicate that low-density blocks exhibit photovoltaic potential ranging from 1 to 6.6 times their total energy *** and high-density blocks achieve photovoltaic potential levels approximately equivalent to 40%-85%of their overall energy ***,significant variations in photovoltaic potential are observed among different urban forms within medium and high-density ***“elevated corners with central valley”prototype is proposed as an effective approach,enhancing the overall photovoltaic potential by approximately 14%.This study introduces novel analytical concepts,shedding light on the intricate relationship between urban morphologies and photovoltaic potential.

关键词： net-zero energy solar energy urban density urban morphology multi-objective optimization photovoltaic potential

Point defects in 2-D liquid crystals with a singular potential:Profiles and stability

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Science China Mathematics 2024年第11期67卷 2515-2540页

作者： Zhiyuan geng Wei Wang Basque Center for Applied Mathematics School of Mathematical Sciences Zhejiang University

We study radial symmetric point defects with degree k/2 in the 2-D disk or R2in the Q-tensor framework with a singular bulk energy,which is defined by Bingham ***,we obtain the existence of solutions for the profiles of radial symmetric point defects with degree k/2 in the 2-D disk or ***,we prove that the solution is stable for |k| = 1 and unstable for |k| > *** identities are derived and utilized throughout the proof of existence and stability/instability.

关键词： radial symmetric point defects singular bulk potential Bingham closure stability

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关于变步长情形下离散函数的一些内插不等式

黑龙江大学自然科学学报 2008年第2期25卷 267-273页

作者：耿艳秋张法勇绥化学院数学系绥化152000 黑龙江大学数学科学学院哈尔滨150080

在研究偏微分方程解的适定性方面,Sobolev空间中的嵌入定理和内插不等式起着非常重要的作用。许多著名学者通过等距分割已经得到了比较好的嵌入定理和内插不等式并进行了证明,文[1]研究了一元离散函数中间差商的若干内插不等式,文[2]研... 详细信息

在研究偏微分方程解的适定性方面,Sobolev空间中的嵌入定理和内插不等式起着非常重要的作用。许多著名学者通过等距分割已经得到了比较好的嵌入定理和内插不等式并进行了证明,文[1]研究了一元离散函数中间差商的若干内插不等式,文[2]研究了三元离散函数中间差商的若干内插不等式。证明了一元离散函数和三元离散函数在不等距分割下也相应满足这些嵌入定理和内插不等式。

关键词：离散函数内插不等式变步长

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园艺作物糖转运蛋白研究进展

园艺学报 2021年第4期48卷 676-688页

作者：耿艳秋董肖昌张春梅山东农业大学林学院黄河下游森林培育国家林业和草原局重点实验室山东泰安271018 山东省果树研究所山东泰安271000

糖转运蛋白在园艺作物生长发育、果实内糖积累以及响应逆境胁迫等方面发挥重要作用,其表达受多种因素的调节。单糖转运蛋白、蔗糖转运蛋白和SWEET(bidirectional sugar transporter,SWEET)是植物中已发现的三大类转运蛋白。就这3种转运... 详细信息

糖转运蛋白在园艺作物生长发育、果实内糖积累以及响应逆境胁迫等方面发挥重要作用,其表达受多种因素的调节。单糖转运蛋白、蔗糖转运蛋白和SWEET(bidirectional sugar transporter,SWEET)是植物中已发现的三大类转运蛋白。就这3种转运蛋白运输活性与底物特异性、组织/器官和细胞定位进行了讨论和比较;重点介绍了园艺作物中糖转运蛋白功能和调控的最新研究进展;进一步分析糖信号、生物胁迫和非生物胁迫等对糖转运蛋白表达的调控。

关键词：园艺作物单糖转运蛋白蔗糖转运蛋白 SWEETs