检索结果-南通市图书馆

Numerical insight into heat transfer enhancement by granules inner-migration in a moving bed:A performance comparison between slanted-stick and plow-shaped agitator

在线全文

学校读者我要写书评

暂无评论

Particuology 2024年第6期89卷 109-116页

作者： Binfan Jiang Hao Pei Dehong Xia haiyang wang School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Shunde Graduate School of University of Science and Technology Beijing Guangdong 528399China Jianlong Group&USTB Joint Laboratory Beijing 100083China

Waste heat recovery of high-temperature granules is one of the most promising sustainable energy supply and carbon reduction ways for industry.A moving bed indirect heat exchanger(MBIHE)with inner-migration was proposed for granular heat *** migration and the enhanced heat transfer induced by two types of agitators(i.e.,agitator with slanted stick A_(s)and with plow-shaped surface A_(p))in the MBIHE are analyzed based on DEM coupled with *** to the effective agitation,the average heat transfer coefficient in the granule side is enhanced to∼3 times compared to that without *** heat recovery efficiency in the moving bed reached more than 70%with the agitations of either A_(s)or A_(p).The heat efficiency of A_(s)is∼7%higher than that of A_(p),but with at least 60%greater rotational *** ensure reliable agitation,the A_(p)is suggested to be adopted in the MBIHE to induce granule migration.

关键词： Waste heat recovery High-temperature granule Granule migration Heat transfer enhancement Industry energy saving

Breeding maize of ideal plant architecture for high-density planting tolerance through modulating shade avoidance response and beyond

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2024年第5期66卷 849-864页

作者： Fereshteh Jafari Baobao wang haiyang wang Junjie Zou Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081China Graduate School of Chinese Academy of Agricultural Sciences Beijing 100081China National Nanfan Research Institute CAASSanya 572025China State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources College of Life SciencesSouth China AgriculturalUniversityGuangzhou 510642China

Maize is a major staple crop widely used as food,animal feed,and raw materials in industrial ***-density planting is a major factor contributing to the continuous increase of maize ***,high planting density usually triggers a shade avoidance response and causes increased plant height and ear height,resulting in lodging and yield *** plant height and ear height,more erect leaf angle,reduced tassel branch number,earlier flowering,and strong root system architecture are five key morphological traits required for maize adaption to high-density *** this review,we summarize recent advances in deciphering the genetic and molecular mechanisms of maize involved in response to high-density *** also discuss some strategies for breeding advanced maize cultivars with superior performance under high-density planting conditions.

关键词： flowering time high-density planting leaf angle maize plant architecture plant height/ear height root architecture tasselbranch

Effect mechanism of seepage force on the hydraulic fracture propagation

在线全文

学校读者我要写书评

暂无评论

International Journal of Coal Science & Technology 2024年第3期11卷 223-240页

作者： haiyang wang Desheng Zhou Yi Zou Peng Zheng School of Petroleum Engineering Xi’an Shiyou UniversityXi’an710065China Engineering Research Center of Development and Management for Low to Extra-Low Permeability Oil and Gas Reservoirs in West China Ministry of EducationXi’an Shiyou UniversityXi’an710065ShaanxiChina Xi’an University of Science and Technology Xi’an710054ShaanxiChina

The flow of fluid through the porous matrix of a reservoir rock applies a seepage force to the solid rock *** the seepage force exerted by fluid flow through the porous matrix of a reservoir rock has a notable influence on rock deformation and failure,its effect on hydraulic fracture(HF)propagation remains ***,in this study,we improved a traditional fluid–solid coupling method by incorporating the role of seepage force during the fracturing fluid seepage,using the discrete element ***,we validated the simulation results of the improved method by comparing them with an analytical solution of the seepage force and published experimental ***,we conducted numerical simulations in both homogeneous and heterogeneous sandstone formations to investigate the influence of seepage force on HF *** results indicate that fluid viscosity has a greater impact on the magnitude and extent of seepage force compared to injection rate,and that lower viscosity and injection rate correspond to shorter hydraulic fracture ***,seepage force influences the direction of HF propagation,causing HFs to deflect towards the side of the reservoir with weaker cementation and higher permeability.

关键词： Hydraulic fracturing Seepage force Fracture propagation Discrete element method Reservoir heterogeneity

Phytochrome B interacts with LIGULELESS1 to control plant architecture and density tolerance in maize

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2024年第8期17卷 1255-1271页

作者： Qingbiao Shi Ying Xia Qibin wang Kaiwen Lv Hengjia Yang Lianzhe Cui Yue Sun Xiaofei wang Qing Tao Xiehai Song Di Xu Wenchang Xu Xingyun wang Xianglan wang Fanying Kong Haisen Zhang Bosheng Li Pinghua Li haiyang wang Gang Li State Key Laboratory of Wheat Improvement College of Life SciencesShandong Agricultural UniversityTai'an 271018China State Key Laboratory of Wheat Improvement College of AgronomyShandong Agricultural UniversityTai'an 271018China Peking University Institute of Advanced Agricultural Sciences Shandong Laboratory of Advanced Agricultural Sciences at WeifangWeifangShandong 261000China Guandong Laboratory for Lingnan Modern Agriculture State Key Laboratory for Conservation and Utilization of Subtropical Agro-BioresourcesSouth China Agricultural UniversityGuangzhou510642China

Over the past few decades,significant improvements in maize yield have been largely attributed to increased plant density of upright hybrid varieties rather than increased yield per ***,dense planting triggers shade avoidance responses(SARs)that optimize light absorption but impair plant vigor and performance,limiting yield improvement through increasing plant *** this study,we demonstrated that high-density-induced leaf angle narrowing and stem/stalk elongation are largely dependent on phytochrome B(phyB1/B2),the primaryphotoreceptor responsible for perceiving red(R)and far-red(FR)light in *** found that maize phyB physically interacts with the LIGULELESS1(LG1),a classical key regulator of leaf angle,to coordinately regulate plant architecture and density *** abundance of LG1 is significantly increased by phyB under high R:FR light(low density)but rapidly decreases under low R:FR light(high density),correlating with variations in leaf angle and plant height under various *** addition,we identified the homeobox transcription factor HB53 as a target co-repressed by both phyB and LG1 but rapidly induced by canopy *** and cellular analyses showed that HB53 regulates plant architecture by controlling the elongation and division of ligular adaxial and abaxial *** together,these findings uncover the phyB-LG1-HB53 regulatory module as a key molecular mechanism governing plant architecture and density tolerance,providing potential genetic targets for breeding maize hybrid varieties suitable for high-density planting.

关键词： maize phytochrome B LIGULELESS1 HB53 leaf angle density tolerance

Correction:Integration of light and hormone signaling pathways in the regulation of plant shade avoidance syndrome

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

aBIOTECH 2024年第1期5卷 115-115页

作者： Yang Liu Fereshteh Jafari haiyang wang Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081China State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources South China Agricultural UniversityGuangzhou 510642China Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou 510642China

Correction:aBI0TECH(2021)2:131-145 https://doi.0rg/10.1007/s42994-021-00038-1 In this article the author's name Fereshteh Jafari was incorrectly written as Feresheeh *** original article has been *** Access This article is licensed under a Creative Commons Attribution 4.0 International License,which permits use,sharing,adaptation,distribution and reproduction in any medium or format.

关键词： Integration Open Creative

Occurrence, Spatial Distribution, Sources and Risk Assessment of Per-and Polyfluoroalkyl Substances in Surface Sediments of the Yellow River Delta Wetland

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2024年第5期23卷 1263-1274页

作者： SUN Yu SHEN Nan ZHANG Dahai CHEN Junhui HE Xiuping JI Yinli wang haiyang LI Xianguo Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China) Ministry of Education Key Laboratory of Marine Eco-Environmental Science and Technology First Institute of Oceanography Ministry of Natural Resources Qingdao Key Laboratory of Analytical Technology Development and Offshore Eco-Environment Conservation The Yellow River Delta Sustainable Development Institute of Shandong Province

Per-and polyfluoroalkyl substances（PFASs） are emerging persistent organic pollutants（POPs）. In this study, 47 surface sediment samples were collected from the Yellow River Delta wetland（YRDW） to investigate the occurrence, spatial distribution, potential sources, and ecological risks of PFASs. Twenty-three out of 26 targeted PFASs were detected in surface sediment samples from the YRDW, with total ∑23PFASs concentrations ranging from 0.23 to 16.30 ng g-1dw and a median value of 2.27 ng g-1dw. Perfluorooctanoic acid（PFOA）, perfluorobutanoic acid（PFBA） and perfluorooctanesulfonic acid（PFOS） were the main contaminants. The detection frequency and concentration of perfluoroalkyl carboxylic acids（PFCAs） were higher than those of perfluoroalkanesulfonic acids（PFSAs）, while those of long-chain PFASs were higher than those of short-chain PFASs. The emerging PFASs substitutes were dominated by 6:2 chlorinated polyfluoroalkyl ether sulfonic acid（6:2 Cl-PFESA）. The distribution of PFASs is significantly influenced by the total organic carbon content in the sediments. The concentration of PFASs seems to be related to human activities, with high concentration levels of PFASs near locations such as beaches and villages. By using a positive matrix factorization model, the potential sources of PFASs in the region were identified as metal plating mist inhibitor and fluoropolymer manufacturing sources, metal plating industry and firefighting foam and textile treatment sources, and food packaging material sources. The risk assessment indicated that PFASs in YRDW sediments do not pose a significant ecological risk to benthic organisms in the region overall, but PFOA and PFOS exert a low to moderate risk at individual stations.

关键词： per- and polyfluoroalkyl substances risk assessment sediment source identification Yellow River Delta wetland

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

生成式AI训练数据的法律风险及其元规制

浙江社会科学 2024年第9期 50-63,157,158页

作者：王海洋西南政法大学博士后流动站重庆401120

以ChatGPT为代表的生成式AI依托于海量的训练数据来实现模型的迭代升级,训练数据的质量和数量直接决定着生成式AI的性能和泛化能力。然而,训练数据本身潜藏着来源合法性、质量可信性、规模偏离性等风险,自我规制与政府规制路径都难以契... 详细信息

以ChatGPT为代表的生成式AI依托于海量的训练数据来实现模型的迭代升级,训练数据的质量和数量直接决定着生成式AI的性能和泛化能力。然而,训练数据本身潜藏着来源合法性、质量可信性、规模偏离性等风险,自我规制与政府规制路径都难以契合生成式AI的市场布局与更迭速度,亟须在包容审慎理念下对生成式AI训练数据予以元规制。在元规制理念下,国家通过规范引导模型研发者将经设计的数据保护与科技伦理理念内嵌于生成式AI的训练数据中,促成数据保护从利用环节延伸至研发环节,通过可信的数据来源、数据分类分级、数据影响评估等措施促成模型研发者自我观照式的内省,并经由数据保护的监管沙盒实现自我规制的规制。

关键词：生成式AI ChatGPT 训练数据元规制

The RNA binding protein EHD6 recruits the m^(6)A reader YTH07 and sequesters OsCOL4 mRNA into phase-separated ribonucleoprotein condensates to promote rice flowering

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2024年第6期17卷 935-954页

作者： Song Cui Peizhe Song Chaolong wang Saihua Chen Benyuan Hao Zhuang Xu Liang Cai Xu Chen Shanshan Zhu Xiangchao Gan Hui Dong Yuan Hu Liang Zhou Haigang Hou Yunlu Tian Xi Liu Liangming Chen Shijia Liu Ling Jiang haiyang wang Guifang Jia Shirong Zhou Jianmin Wan State Key Laboratory for Crop Genetics&Germplasm Enhancement and Utilization Zhongshan Biological Breeding LaboratoryNational Observation and Research Station of Rice Germplasm ResourcesNanjing Agricultural UniversityNanjing 210095China State Key Laboratory for Crop Gene Resources and Breeding Institute of Crop ScienceChinese Academy of Agricultural SciencesBeijing 100081China Synthetic and Functional Biomolecules Center Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking-Tsinghua Center for Life SciencesBeijing Advanced Center of RNA BiologyPeking UniversityBeijingChina Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding Agricultural College of Yangzhou UniversityYangzhou 225009China Max Planck Institute for Plant Breeding Research Carl-von-Linne´-Weg 1050829 KolnGermany

N6-Methyladenosine(m^(6)A)is one of the most abundant modifications of eukaryotic mRNA,but its comprehensive biological functionality remains further *** this study,we identified and characterized a new flowering-promoting gene,EARLY HEADING DATE6(EHD6),in ***6 encodes an RNA recognition motif(RRM)-containing RNA binding protein that is localized in the non-membranous cytoplasm ribonucleoprotein(RNP)granules and can bind both m^(6)A-modified RNA and unmodified RNA *** found that EHD6 can physically interact with YTH07,a YTH(YT521-B homology)domain-containing m^(6)A *** showed that their interaction enhances the binding of an m^(6)A-modified RNA and triggers relocation of a portion of YTH07 from the cytoplasm into RNP granules through phase-separated *** these condensates,the mRNA of a rice flowering repressor,CONSTANS-like 4(OsCOL4),becomes sequestered,leading to a reduction in its protein abundance and thus accelerated flowering through the Early heading date 1 *** together,these results not only shed new light on the molecular mechanism of efficient m^(6)A recognition by the collaboration between an RNA binding protein and YTH family m^(6)A reader,but also uncover the potential for m^(6)A-mediated translation regulation through phaseseparated ribonucleoprotein condensation in rice.

关键词： N6-methyladenosine m^(6)A EHD6 YTH domain-containing protein phase separation heading date

种子功能性状在道路边坡植物群落形成过程中的作用

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

林业科学 2024年第3期60卷 141-149页

作者：秦坤蓉秦华林立王海洋西南大学园艺园林学院南方山地园艺学教育部重点实验室重庆400715 福建农林大学风景园林与艺术学院福州350002

道路边坡是一种受人为活动持续干扰的人造生境。因受种子可用性和苛刻立地环境的双重限制,道路边坡植被恢复一直是困扰林业管理者的难题。尽管现有边坡恢复工程技术已相对成熟,但恢复的植物群落通常缺乏自然性和可持续性,其重要原因之... 详细信息

道路边坡是一种受人为活动持续干扰的人造生境。因受种子可用性和苛刻立地环境的双重限制,道路边坡植被恢复一直是困扰林业管理者的难题。尽管现有边坡恢复工程技术已相对成熟,但恢复的植物群落通常缺乏自然性和可持续性,其重要原因之一在于既有恢复技术通常忽略群落的形成规律及植物性状在群落构建过程中的潜在作用。植物功能性状分析已成为理解植物群落生态学过程和模式的基本工具,但种子功能性状的重要性在很大程度上仍被忽视,尤其是与种子扩散、沉淀、萌发等群落形成过程密切相关的性状。基于此,为更好理解种子功能性状在边坡植物群落形成过程中的作用,本研究立足于道路边坡生物和非生物环境特征及其生态限制,对既有相关研究进行总结,剖析自然条件下影响植物在道路边坡定植的关键因素,并从种子功能性状角度概述植物种子在扩散、沉淀和萌发等早期群落建立过程中适应边坡环境的生态对策,同时阐述种子功能性状在群落恢复预测以及恢复植物筛选等方面的潜力。总体而言,与种子扩散、沉淀和萌发能力相关的种子性状对植物在道路边坡上成功定植至关重要。演替早期,种源短缺和苛刻非生物环境是影响边坡植物群落建立的主要因素。适应边坡环境的植物,通常在种子扩散、沉淀和萌发等方面有特殊的生态策略,以适应道路边坡强地表径流冲刷、干旱、贫瘠的环境。对相关成果进行总结有利于更好从种子性状角度了解道路边坡早期植物群落的形成过程和规律及种子性状在该过程中的作用和潜力,为生态敏感区内道路边坡植被恢复研究与实践提供理论支撑。

关键词：植物性状群落构建环境过滤早期植物群落植被恢复