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赣南脐橙果实品质现状及分布特征分析

中国南方果树 2024年第1期53卷 9-13页

作者：习建龙谢上海李航胡燕黎芳梅邓修顺卢俊华杨忠富赖晓桦江西省赣州市果业发展中心江西赣州341000 信丰县果业发展服务中心江西赣州341000 赣州市南康区果茶发展服务中心江西赣州341000 安远县果业发展服务中心江西赣州341000 兴国县果茶发展服务中心江西赣州341000

为了解赣南脐橙品质现状及其不同区域、树龄及土壤类型对果实品质的影响,2020—2021年每年11月25—30日在17个县(市、区)66个主产乡镇的204个脐橙果园采果实样品测定内在品质。结果表明,赣南脐橙果实整体品质优良,且中部盆地区域(北纬25... 详细信息

为了解赣南脐橙品质现状及其不同区域、树龄及土壤类型对果实品质的影响,2020—2021年每年11月25—30日在17个县(市、区)66个主产乡镇的204个脐橙果园采果实样品测定内在品质。结果表明,赣南脐橙果实整体品质优良,且中部盆地区域(北纬25°34′33″~26°8′5″)品质更优,当栽植地向北或向南推移时,可溶性固形物(TSS)含量呈下降趋势,尤其南部低纬度区域可能出现显著下降;低龄树果实TSS含量较低,14~20年生树果实品质趋于稳定且TSS含量高,但树龄≥21年则品质开始降低;土壤类型对赣南脐橙果实品质影响甚弱,仅果实维生素C含量可能出现差异。为了使上市果品质量相对一致,赣南脐橙应根据区域和树龄等分批次采摘上市,中部果园和壮年园适时采收,南部和北部果园、低龄果园适当延迟采收;栽培管理方面,低龄园应通过控制氮肥施用等措施缓和树势,老龄园应通过更新复壮及扩穴增施有机肥等措施恢复树势,以改善品质。目前赣南脐橙绝大部分为2014年后定植,随树龄增长,未来十多年内赣南脐橙整体品质可能还会提升。

关键词：赣南脐橙果实品质分布特征

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Simultaneous enhancement of strength and ductility via microband formation and nanotwinning in an L1_(2)-strengthened alloy

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Fundamental Research 2024年第1期4卷 147-157页

作者： lu Yang Dingshan Liang Zhuo Cheng Ranxi Duan Chuanxin Zhong junhua luan Zengbao Jiao Fuzeng Ren Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China

Metallic alloys with high strength and large ductility are required for extreme structural ***,the achievement of ultrahigh strength often results in a substantially decreased ***,we report a strategy to achieve the strength-ductility synergy by tailoring the alloy composition to control the local stacking fault energy(SFE)of the face-centered-cubic(fcc)matrix in an L1_(2)-strengthened superlattice *** a proof of concept,based on the thermodynamic calculations,we developed a non-equiatomic CoCrNi_(2)(Al_(0.2)Nb_(0.2))alloy using phase separation to create a near-equiatomic low SFE disordered CoCrNi medium-entropy alloy matrix with in situ formed high-content coherent Ni_(3)(Al,Nb)-type ordered nanoprecipitates(∼12 nm).The alloy achieves a high tensile strength up to 1.6 GPa and a uniform ductility of 33%.The low SFE of the fcc matrix promotes the formation of nanotwins and parallel microbands during plastic deformation which could remarkably enhance the strain hardening *** work provides a strategy for developing ultrahigh-strength alloys with large uniform ductility.

关键词： L1_(2)-strengthened superlattice alloy Stacking fault energy Nanotwins Microbands Strain hardening

Recent progress and trends in predictive visual analytics

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Frontiers of Computer Science 2017年第2期11卷 192-207页

作者： junhua lu Wei CHEN Yuxin MA Junming KE Zongzhuang LI Fan ZHANG Ross MACIEJEWSKI State Key Lab of Computer Aided Design and Computer Graphics Zhejiang University Hangzhou 310058 China College of Science Zhejiang University of Technology Hangzhou 310023 China College of Computer Science and Technology Zhejiang University of Technology Hangzhou 310023 China School of Computing Informatics and Decision Systems Engineering Arizona State University Tempe AZ 85287-8809 USA

A wide variety of predictive analytics techniques have been developed in statistics, machine learning and data mining; however, many of these algorithms take a black-box approach in which data is input and future predictions are output with no insight into what goes on during the process. Unfortunately, such a closed system approach often leaves little room for injecting domain expertise and can result in frustration from analysts when results seem snurious or confusing. In order to allow for more human-centric approaches, the visualization community has begun developing methods to enable users to incorporate expert knowledge into the pre- diction process at all stages, including data cleaning, feature selection, model building and model validation. This paper surveys current progress and trends in predictive visual ana- lytics, identifies the common framework in which predictive visual analytics systems operate, and develops a summariza- tion of the predictive analytics workfiow.

关键词： predictive visual analytics visualization visual analytics data mining predictive analysis

Pd-Catalyzed Highly Regioselective Hydroesterification of Terminal Alkyl Olefins with Formates

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Chinese Journal of Chemistry 2024年第12期42卷 1381-1386页

作者： junhua Li Tianci Shen Yan Yang Yian Shi Jiangsu Key Laboratory of Advanced Catalytic Materials&Technology Schoolof Petrochemical EngineeringInstitute of Natural and Synthetic Organic ChemistryChangzhou UniversityChangzhouJiangsu 213164China

Comprehensive Summary A Pd-catalyzed regioselective hydroesterification of alkyl terminal olefins with aryl formates is described.A wide variety of linear carboxylic esters bearing various functional groups can be obtained in good yields with high regioselectivities under mild reaction conditions by using 1,2-DTBPMB or(p-F-Ph)3P as *** reaction process is operationally simple and requires no handling of toxic CO or strong *** resulting aryl esters can be readily converted to other carboxylic acid derivatives.

关键词： Alkenes Regioselectivity Carbonylation Hydroesterification Formates

Effective Identity Authentication Based on Multiattribute Centers for Secure Government Data Sharing

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Tsinghua Science and Technology 2024年第3期29卷 736-752页

作者： Meiquan Wang junhua Wu Tongdui Zhang Junhao Wu Guangshun Li School of Computer Science Qufu Normal UniversityRizhao 276800China Science and Technology Innovation Service Institution of Rizhao Rizhao 276800China

As one of the essential steps to secure government data sharing,Identity Authentication(IA)plays a vital role in the processing of large ***,the centralized IA scheme based on a trusted third party presents problems of information leakage and single point of failure,and those related to key ***,herein,an effective IA model based on multiattribute centers is ***,a private key of each attribute of a data requester is generated by the attribute authorization *** obtaining the private key of attribute,the data requester generates a personal private ***,a dynamic key generation algorithm is proposed,which combines blockchain and smart contracts to periodically update the key of a data requester to prevent theft by external attackers,ensure the traceability of IA,and reduce the risk of privacy ***,the combination of blockchain and interplanetary file systems is used to store attribute field information of the data requester to further reduce the cost of blockchain information storage and improve the effectiveness of information *** results show that the proposed model ensures the privacy and security of identity information and outperforms similar authentication models in terms of computational and communication costs.

关键词： blockchain identity authentication distribution dynamic key generation

Lamellar water induced quantized interlayer spacing of nanochannels walls

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Green Energy & Environment 2024年第2期9卷 356-365页

作者： Yue Zhang Chenlu Wang Chunlei Wang Yingyan Zhang junhua Zhao Ning Wei Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology Jiangnan UniversityWuxi214122China Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas Ministry of EducationNorthwest A&F UniversityYangling712100China Zhangjiang Lab Interdisplinary Research CenterShanghai Advanced Research InstituteChinese Academy of SciencesShanghai201210China Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai201800China Mechanical&Automotive Engineering School of EngineeringRMIT UniversityBundooraMelbourneVICVIC 3083Australia

The nanoscale confinement is of great important for the industrial applications of molecular sieve,desalination,and also essential in bio-logical transport *** efforts have been devoted to the influence of restricted spaces on the properties of confined ***,the situation of channel-wall is crucial but attracts less attention and remains *** fundamentally understand the mechanism of channel-walls in nanoconfinement,we investigated the interaction between the counter-force of the liquid and interlamellar spacing of nanochannel walls by considering the effect of both spatial confinement and surface *** results reveal that the nanochannel stables at only a few discrete spacing states when its confinement is within 1.4 *** quantized interlayer spacing is attributed to water molecules becoming laminated structures,and the stable states are corresponding to the monolayer,bilayer and trilayer water configurations,*** results can potentially help to understand the characterized interlayers spacing of graphene oxide membrane in *** findings are hold great promise in design of ion filtration membrane and artificial water/ion channels.

关键词： Nanoconfinement Quantized spacing Lamellar water layer MD simulations Entropy force

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Experimental Investigation of Thermal Lensing in End-pumped Nd∶YVO4 Crystal Using a New Simple Approach

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Chinese Journal of Lasers 1999年第2期8卷 8-13页

作者： LIU Junhai lu Jianren lu junhua SHAO Zongshu JIANG Minhua (National Laboratory of Crystal Materials, Shandong University, Jinan 250100, China) 山东大学晶体材料国家重点实验室山东济南 250100 山东大学晶体材料国家重点实验室山东济南

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｈｉｇｈｐｏｗｅｒｓｏｌｉｄｓｔａｔｅｌａｓｅｒｓ，ｐｕｍｐｉｎｄｕｃｅｄｔｈｅｒｍａｌｆｏｃｕｓｉｎｇｉｓｏｆｐｒｉｍａｒｙｉｍｐｏｒｔａｎｃｅｂｅｃａｕｓｅｏｆｉｔｓｓｉｇｎｉ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｈｉｇｈｐｏｗｅｒｓｏｌｉｄｓｔａｔｅｌａｓｅｒｓ，ｐｕｍｐｉｎｄｕｃｅｄｔｈｅｒｍａｌｆｏｃｕｓｉｎｇｉｓｏｆｐｒｉｍａｒｙｉｍｐｏｒｔａｎｃｅｂｅｃａｕｓｅｏｆｉｔｓｓｉｇｎｉｆｉｃａｎｔｉｎｆｌｕｅｎｃｅｓｏ...

关键词： thermal lensing thermal focal length Nd∶YVO 4 crystal resonator stability

Discourse analysis of knowledge-based live streaming:a case study of East Buy streamer Dong Yuhui

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Language and Semiotic Studies 2024年第2期10卷 222-244页

作者： Yehui Song junhua Mo Korean Department Soochow UniversitySuzhou215006China English Department Soochow UniversitySuzhouChina

Live streaming e-commerce is not only an important part of China’s digital economy but also the preferred way of purchase for many Chinese,especially the *** 2022,a new model initiated by East Buy has emerged,quickly becoming known as knowledge-based live *** most famous streamer from this novel type of live streaming is Dong Yuhui,a former English teacher of the New Oriental *** a top Internet influencer with millions of followers,Dong Yuhui has become a conspicuous social sign of the rising China that is undergoing fast technological,economic,and cultural *** study thus takes Dong Yuhui as an example to examine the typical discourses of the knowledge-based live *** a triangulation of case study,discourse analysis,and sentiment analysis,it finds that Dong Yuhui mainly employs the strategies of disseminating encyclopedic knowledge,telling intriguing stories,and using poetic language in his live streaming *** unique discourse has the main function of fulfilling customers’intellectual,emotional,and psychological *** such,it is warmly received by customers,whose comments are centered on the talents of the streamer rather than the attributes of the commodity.

关键词： knowledge-based live streaming Dong Yuhui typical discourses major strategies main functions customer comments

BeXplorer:Visual analytics of dynamic interplay between communication and purchase behaviors in MMORPGs

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Visual Informatics 2019年第2期3卷 87-101页

作者： junhua lu Xiao Xie Ji Lan Tai-Quan Peng Yingcai Wu Wei Chen State Key Lab of CAD&CG Zhejiang UniversityChina Department of Communication Michigan State UniversityUnited States

With the rapid development of massively multiplayer online role-playing games(MMORPGs),a huge amount of fine-grained data on the in-game activities of players have been recorded by MMORPGs *** data provide considerable opportunities with which to study the dynamic interplay between player behaviors and investigate the roles of various social structures that underlie such ***,it is challenging to model and visualize these behavioral *** study proposes a novel influence-susceptible model to measure the dynamic interplay between *** on this model,we introduce a new visual analytics system called *** system enables analysts to interactively explore the dynamic interplay between player purchase and communication behaviors and to examine the manner in which this interplay is bound by social structures where players are *** case studies and a task-based evaluation are conducted to demonstrate the effectiveness and applicability of our method.

关键词： Behavior visualization Game visualization MMORPG