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Mismatch loss analysis of solar array output power on stratospheric airship during flight

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Chinese Journal of Aeronautics 2024年第2期37卷 371-384页

作者： siyu liu Kangwen SUN Haoquan LIANG Xinzhe JI Tong ZOU Chuan SHAN School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China Yunnan Innovation Institute Beihang UniversityKunming 650233China Institute of Unmanned System Beihang UniversityBeijing 100191China

Stratospheric airships are long-endurance aerostats and have broad *** of the energy required for their operation is obtained from solar radiation,which makes accurate calculation of the energy output from the solar array crucial to the design and flight planning of the ***,the status of each photovoltaic module in the solar array may differ due to the airship curvature,resulting in mismatch losses and lowered output power,which has not been widely *** this paper,an irradiation model and a thermal model are established based on the actual arrangement of the *** output power model is established considering the non-uniform radiation in the *** mismatch losses of the array are analyzed under different flight *** output power of the solar array is decreased by up to 31.6%compared to the ideal ***,the proportion of mismatch losses increases with latitude,but the maximum mismatch loss power occurs at ***,an array reconfiguration method is proposed based on the irradiance dispersion index and position dispersion *** reconfigured array increases output power by 11.5%and can maintain energy balance in continuous *** results can be used to correct the overestimation of the output power during the airship design or to guide the configuration of the solar array.

关键词： Stratospheric airship Solar panels Solar energy Non-uniform irradiation Mismatch loss assessment Reconfiguration

A nanobody-based blocking enzyme-linked immunosorbent assay for detecting antibodies against pseudorabies virus glycoprotein E

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Journal of Integrative Agriculture 2024年第4期23卷 1354-1368页

作者： Huanhuan Lü Pinpin Ji siyu liu Ziwei Zhang Lei Wang Yani Sun Baoyuan liu Lizhen Wang Qin Zhao Department of Preventive Veterinary Medicine College of Veterinary MedicineNorthwest A&F University/Shaanxi Scientific Observing and Experimental Station of Veterinary Pharmacology and Diagnostic TechnologyMinistry of Agriculture and Rural AffairsYangling 712100China

Pseudorabies(PR)is an acute infectious disease of pigs caused by the PR virus(PRV)and results in great economic losses to the pig industry *** glycoprotein E(gE)-based enzyme-linked immunosorbent assay(ELISA)has been used to distinguish gE-deleted vaccine-immunized pigs from wild-type virus-infected pigs to eradicate PR in some *** has the advantages of small size and easy genetic engineering and has been a promising diagnostic ***,there were few reports about developing nanobody-based ELISA for detecting anti-PRV-gE *** the present study,the recombinant PRV-gE was expressed with a bacterial system and used to immunize the Bactrian ***,two nanobodies against PRV-gE were screened from the immunized camel by phage display ***,two nanobody-HRP fusion proteins were expressed with HEK293T *** PRV-gE-Nb36-HRP fusion protein was selected as the probe for developing the blocking ELISA(bELISA)to detect anti-PRV-gE *** optimizing the conditions of bELISA,the amount of coated antigen was 200 ng per well,and dilutions of the fusion protein and tested pig sera were separately 1:320 and 1:*** cut-off value of bELISA was 24.20%,and the sensitivity and specificity were 96.43 and 92.63%,*** detecting 233 clinical pig sera with the developed bELISA and a commercial kit,the results showed that the coincidence rate of two assays was 93.99%.Additionallly,epitope mapping showed that PRV-gE-Nb36 recognized a conserved conformational epitope in different reference PRV ***,great stability and low-cost nanobody-based bELISA for detecting anti-PRV-gE antibodies were *** bELISA could be used for monitoring and eradicating PR.

关键词： nanobody nanobody-HRP blocking ELISA PRV-gE antibody

Rice gene OsUGT75A regulates seedling emergence under deep-sowing conditions

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The Crop Journal 2024年第1期12卷 133-141页

作者： Jia Zhao siyu liu Xiaoqian Zhao Zhibo Huang Shan Sun Zixuan Zeng Yongqi He Zhoufei Wang The Laboratory of Seed Science and Technology Guangdong Key Laboratory of Plant Molecular BreedingNational Engineering Research Center of Plant Space BreedingSouth China Agricultural UniversityGuangzhou 510642GuangdongChina

Poor seedling emergence is a challenge for direct seeding of rice under deep-sowing field *** we reveal that UDP-glucosyltransferase OsUGT75A promotes rice seedling emergence under deepsowing conditions by increasing shoot *** of OsUGT75A was higher in the middle regions of the shoot and in shoots under deep-sowing *** of free abscisic acid(ABA)and jasmonates(JA)were higher in shoots of OsUGT75A mutants than in those of wild-type plants,and OsUGT75A mutants were more sensitive to ABA and JA *** shoot length was attributed to higher ABA INSENSITIVE 3(OsABI3)expression and lower JASMONATE-ZIM domain protein(OsJAZ)expression in *** extension by OsUGT75A is achieved mainly by promotion of cell *** elite haplotype of OsUGT75A associated with increased shoot length was identified among indica rice ***75A acts to increase seedling emergence under deep-sowing conditions.

关键词： Abscisic acid Deep-sowing Jasmonic acid Rice Shoot length

Oxygen heterocyclic compounds(OHCs) in lemon oils are important markers in targeted HPLC analyses for authentication

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Food Science and Human Wellness 2024年

作者： siyu liu Shiming Li Chi-Tang Ho Department of Food Science Rutgers University New Brunswick College of Biology and Agricultural Resources Huanggang Normal University

Lemon oils are broadly used as flavoring agents in beverages， foods， cosmetics and pharmaceuticals， yet the adulteration of natural， particularly cold pressed lemon oils is very common in the industry due to its unmet demand and high cost. Nowadays， most quality control (QC) analysis of lemon oils is conducted by gas chromatography (GC) analysis， which is far from a reliable method. Oxygen heterocyclic compounds (OHCs) in non-volatile fraction are gaining increasing attention in authentication process because of the nearly finger-printing profiles of OHCs in cold pressed citrus essential oils. Our goal in this study was to identify OHCs using high performance liquid chromatography (HPLC) in lemon oils， establish OHC profiles， perform stepwise logistic regression analysis (SLRA) and build effective predicting model and further determine adulterated lemon oils by referencing the OHC profiles and established models. After HPLC analyses， profiling and SLRA modeling of 154 OHCs samples of industrial lemon oils， we found that the combination of isopimpinellin and total OHC concentration are essential and robust predictors to differentiate authentic samples from adulterated lemon oils with a success rate of 98% from the 5-fold cross validation. This study provided a reliable and efficient method in determining the authenticity of lemon oils.

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Manipulating Na occupation and constructing protective film of P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2) as long-term cycle stability cathode for sodium-ion batteries

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Journal of Energy Chemistry 2024年第1期88卷 603-611,I0013页

作者： Yiran Sun Pengfei Zhou siyu liu Zhongjun Zhao Yihao Pan Xiangyan Shen Xiaozhong Wu Jinping Zhao Junying Weng Jin Zhou School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 0255000ShandongChina School of Materials Science and Engineering Shandong University of TechnologyZibo 255049ShandongChina

P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2)(NNMO)is promising cathode material for sodium-ion batteries(SIBs)due to its high specific capacity and fast Na+diffusion ***,the irreversible P2-O_(2)phase transformation,Na+/vacancy ordering,and transition metal(TM)dissolution seriously damage its cycling stability and restrict its commercialization ***,Na occupation manipulation and interface stabilization are proposed to strengthen the phase structure of NNMO by synergistic Zn/Ti co-doping and introducing lithium difluorophosp(LiPO_(2)F_(2))film-forming electrolyte *** Zn/Ti co-doping regulates the occupancy ratio of Nae/Nafat Na sites and disorganizes the Na+/vacancy ordering,resulting in a faster Na+diffusion kinetics and reversible P2-Z phase transition for P2-Na_(0.67)Ni_(0.28)Zn_(0.05)Mn_(0.62)Ti_(0.05)O_(2)(NNZMTO).Meanwhile,the LiPO_(2)F_(2)additive can form homogeneous and ultrathin cathode-electrolyte interphase(CEI)on NNZMTO surface,which can stabilize the NNZMTO-electrolyte interface to prevent TM dissolution,surface structure transformation,and micro-crack *** studies of in situ and ex situ characterizations and theoretical calculations were used to elucidate the storage mechanism of NNZMTO with Li PO_(2)F_(2)*** a result,the NNZMTO displays outstanding capacity retention of 94.44%after 500 cycles at 1C with 0.3 wt%Li PO_(2)F_(2),excellent rate performance of 92.5 mA h g^(-1)at 8C with 0.1 wt%Li PO_(2)F_(2),and remarkable full cell *** work highlights the important role of manipulating Na occupation and constructing protective film in the design of layered materials,which provides a promising direction for developing high-performance cathodes for SIBs.

关键词： Layered cathode Zn/Ti co-doping Na occupation Electrolyte additive Sodium-ion batteries

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分层媒质中的分步相位偏移光声成像方法

声学学报 2024年第3期49卷 392-397页

作者：刘思宇王云石阚威威西南技术物理研究所成都610041 南京理工大学物理学院南京210094

为了解决波场外推方法在横向声速不均匀的分层媒质中图像重建能力受限的问题,提出了一种基于分步相位偏移的不规则分层媒质光声成像方法。该方法将横向声速差异等效为分层媒质界面处的扰动声源,利用该扰动声源对相位偏移的结果进行额外... 详细信息

为了解决波场外推方法在横向声速不均匀的分层媒质中图像重建能力受限的问题,提出了一种基于分步相位偏移的不规则分层媒质光声成像方法。该方法将横向声速差异等效为分层媒质界面处的扰动声源,利用该扰动声源对相位偏移的结果进行额外的校正偏移,并采用变步长的混合外推机制,实现光声波场的逐层外推重建。仿真模拟及实验结果均表明,分步相位偏移方法能够有效抑制不规则分层媒质光声成像中伪影的产生,并提升成像分辨率以及图像对比度。

关键词：光声成像分层媒质成像相位偏移波场外推

双功能活化制备沥青基硬炭用于钠离子电池负极

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化工学报 2024年第3期75卷 1019-1027页

作者：吴吉昊陈涛刘思宇刘梦柯杨卷西安交通大学化工学院陕西西安710049

硬炭作为钠离子电池(SIBs)最具有应用前景的负极材料,其形貌的可控调节和结构优化被广泛研究和关注。以煤沥青为原料,采用柠檬酸钾(C_(6)H_(5)K_(3)O_(7)·H_(2)O)作为双功能活化剂:(1)气体分解产物可消耗过量的氢,实现沥青的固态热解,... 详细信息

硬炭作为钠离子电池(SIBs)最具有应用前景的负极材料,其形貌的可控调节和结构优化被广泛研究和关注。以煤沥青为原料,采用柠檬酸钾(C_(6)H_(5)K_(3)O_(7)·H_(2)O)作为双功能活化剂:(1)气体分解产物可消耗过量的氢,实现沥青的固态热解,阻碍有序微晶的生成;(2)固态分解产物钾盐进行活化造孔,从而在高温碳化过程中形成丰富的封闭纳米孔。基于此,成功制备了具有高度无序、多孔片状结构的沥青基硬炭材料,并应用于SIBs负极,探究其电化学性能。研究发现,通过调控活化剂用量可以实现沥青基硬炭微观结构的优化,在适宜质量比条件下制备的硬炭(HC-2-1300)首次库仑效率高达81.5%,在0.1 A·g^(-1)的电流密度下,其可逆比容量为214.2 mAh·g^(-1),明显优于直接碳化的样品(DC-1300)。同时,在5 A·g^(-1)的高电流密度下,HC-2-1300样品仍有116.7 mAh·g^(-1)的可逆比容量,且在1 A·g^(-1)电流密度下充放电循环2000圈后,容量保持率达75.1%,显现出优异的倍率性能和循环稳定性,具有广阔的应用前景。

关键词：钠离子电池沥青基硬炭双功能活化剂电化学性能

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带时间窗的多机器人系统复杂任务路径规划

南京邮电大学学报（自然科学版） 2024年第2期44卷 83-90页

作者：何舟刘思羽陕西科技大学电气与控制工程学院陕西西安710021 陕西科技大学机电工程学院陕西西安710021

针对多机器人系统在复杂任务和时间窗双重约束下的路径规划问题,通过改进蚁群算法实现满足以布尔任务给出的轨迹要求及时间窗约束的最短路径规划。首先,根据全局地图信息和布尔任务提出一种基于Dijkstra算法的预处理算法,计算任务区域... 详细信息

针对多机器人系统在复杂任务和时间窗双重约束下的路径规划问题,通过改进蚁群算法实现满足以布尔任务给出的轨迹要求及时间窗约束的最短路径规划。首先,根据全局地图信息和布尔任务提出一种基于Dijkstra算法的预处理算法,计算任务区域之间的最短路径;其次,为了提高求解质量并加快收敛速度,引入基于A∗算法的评估函数改进蚁群算法的启发信息,并结合蚂蚁回退机制,提出一种改进蚁群算法,规划满足任务和时间窗约束的最短路径;最后,通过仿真实验证明所提算法的有效性,并与现有研究进行比较,在求解质量和算法收敛性方面均优于现有方法。

关键词：多机器人系统布尔任务路径规划时间窗

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我国竞技体育财政支持效率及影响因素分析

北京体育大学学报 2024年第2期47卷 10-24页

作者：韩松周克男刘思语中国人民大学经济学院运筹学与数量经济研究所北京100872 中国人民大学经济学院北京100872

研究财政对竞技体育的支持效率和影响因素分析,对提高我国竞技体育水平,建设现代化体育强国具有重要意义。构建了两阶段网络DEA模型,将我国竞技体育财政支持系统细化为体育财政阶段和竞技体育绩效阶段,通过2016—2019年数据计算整体及... 详细信息

研究财政对竞技体育的支持效率和影响因素分析,对提高我国竞技体育水平,建设现代化体育强国具有重要意义。构建了两阶段网络DEA模型,将我国竞技体育财政支持系统细化为体育财政阶段和竞技体育绩效阶段,通过2016—2019年数据计算整体及子阶段效率,并结合随机效应模型对我国竞技体育效率进行影响因素分析。研究表明,我国各省竞技体育财政支持系统效率处于波浪式变化趋势,且体育财政阶段效率明显高于竞技体育绩效阶段;从动态演进的角度来看,各省份财政支持系统间的效率差距在缩小,但竞技体育绩效阶段出现两极分化现象,且效率较低的省份出现效率值进一步降低的趋势。此外,我国东北地区的竞技体育绩效阶段效率值高于其他地区,并且优势明显,西部地区效率水平最低。进一步研究发现,加强体育交流与合作会提升我国高水平竞技体育的表现,且西部地区提升幅度最大;高质量的人才水平及科技创新对竞技体育的发展具有正向影响,其中人才水平的影响最为显著,反映了全社会劳动力水平对竞技体育绩效阶段效率的重要作用。

关键词：竞技体育财政支持系统两阶段网络DEA模型随机效应模型交流与合作劳动力水平