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供应中断风险下具有质量差异的产品组合定价与采购策略

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系统工程理论与实践 2024年第3期44卷 1068-1082页

作者：王军进张白羽刘家国大连海事大学航运经济与管理学院大连116026

针对高质量的制造商品牌相比低质量的零售商自有品牌更易遭受供应中断的现象,构建一个零售商“订购+销售”的两阶段博弈模型,考虑产品质量、采购成本及供应稳定的三维异质性,探究制造商品牌+自有品牌产品组合的定价与采购策略.研究结果... 详细信息

针对高质量的制造商品牌相比低质量的零售商自有品牌更易遭受供应中断的现象,构建一个零售商“订购+销售”的两阶段博弈模型,考虑产品质量、采购成本及供应稳定的三维异质性,探究制造商品牌+自有品牌产品组合的定价与采购策略.研究结果表明,当制造商品牌无法交付时,若产品质量差异较大,与两种产品均交付的情况相比,零售商通常会降低自有品牌的销售价格,采购更多的自有品牌与更少的制造商品牌从而减轻供应中断风险的负面影响.随着供应不确定性的升高,零售商对自有品牌的订购量进一步增大,可能会出现自有品牌的库存现象;有趣的是,当产品质量差异较小时,零售商会围绕制造商品牌制定销售策略,面对更高的供应中断风险反而会增加制造商品牌的订购,通过提高自有品牌的销售价格,诱导消费者购买更多的制造商品牌.

关键词：质量差异供应中断制造商品牌自有品牌定价与采购

评价支架如何影响在线同伴互评交互质量?——基于SOLO分类理论的视角分析

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数字教育 2024年第4期10卷 31-37页

作者：刘丹张柏钰李玉斌辽宁师范大学教育学部辽宁大连116029

学习者充足的交互是保证同伴互评有效性的重要途径。为解决当前在线同伴互评中缺乏对同伴之间深度交互的引导,导致学习者交互处于较浅层级等问题,以SOLO分类理论为指导,围绕5种不同的思维水平设计评价支架,以“现代教育技术”课程为例,... 详细信息

学习者充足的交互是保证同伴互评有效性的重要途径。为解决当前在线同伴互评中缺乏对同伴之间深度交互的引导,导致学习者交互处于较浅层级等问题,以SOLO分类理论为指导,围绕5种不同的思维水平设计评价支架,以“现代教育技术”课程为例,采用准实验研究法,对评价活动产生的交互文本进行量化内容分析,以及对学习者的作品改进情况进行分析,探究评价支架对在线同伴互评交互质量的影响。研究发现:(1)评价支架能够显著提升学习者参与互评活动的交互结果质量;(2)评价支架促进学习者的交互深度由浅层级向更深层级转化;(3)学习者对评价支架持认可态度,评价支架作为一种评价工具,可以有效指导互评活动,促进学习者自身的课程学习。

关键词：同伴互评 SOLO分类理论评价支架交互深度

ABO血型IgG抗体效价与新生儿溶血病发生关系研究

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华南预防医学 2024年第4期50卷 372-374,379页

作者：张白玉卢敏翟荣萍南京市溧水区人民医院江苏南京211200

目的研究ABO血型IgG抗体效价与新生儿溶血病发生关系,为早期预测新生儿溶血病提供参考依据。方法以2019年1月至2022年12月在南京市溧水区人民医院建档产检且夫妇血型不合的O型血孕妇作为研究对象,分别于妊娠28~32周(孕中期)、36~38周(... 详细信息

目的研究ABO血型IgG抗体效价与新生儿溶血病发生关系,为早期预测新生儿溶血病提供参考依据。方法以2019年1月至2022年12月在南京市溧水区人民医院建档产检且夫妇血型不合的O型血孕妇作为研究对象,分别于妊娠28~32周(孕中期)、36~38周(孕晚期)采用微柱凝胶抗人球蛋白试验测定孕妇血清IgG抗A(B)抗体效价,收集孕妇相关资料,采用描述性分析方法分析ABO血型IgG抗体效价与新生儿溶血病发生关系。结果最终获得有效研究对象1652例,有效率91.78%。不同血型、不同孕期的孕妇ABO血型IgG抗体效价情况差异均无统计学意义(均P>0.05)。新生儿溶血发生率20.94%(346/1652)。多因素logistic回归分析显示孕妇血清IgG抗体效价越高(OR=4.521)、新生儿网织红细胞计数异常(OR=1.988)、新生儿高胆红素血症危险程度越高(OR=2.983)的新生儿溶血发生率可能更高。结论ABO血型IgG抗体效价均与新生儿溶血病存在密切关联,根据孕妇ABO血型IgG抗体效价情况,并综合新生儿网织红细胞计数、高胆红素血症危险程度情况有利于早期预测新生儿溶血病,具有一定防治意义。

关键词：新生儿溶血病 ABO血型 O型血抗体效价孕期

Assessment of Microbial Communities and Their Relationship with Enzymatic Activity during Composting

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World Journal of Engineering and Technology 2017年第3期5卷 93-102页

作者： Khoshrooz Kazemi baiyu zhang Leonard M. Lye Faculty of Engineering and Applied Science Memorial University of Newfoundland St. John’s Canada

Microbial communities and enzyme activities are the main players during municipal solid waste (MSW) composting, but the relationship between microbial communities (i.e., mesophilic and thermophilic ones) and enzyme activities (i.e., dehydrogenase, β-glucosidase, phosphatase and urea) has not been well studied. Therefore, the objective of this work is to determine the enzymes profiles during municipal solid waste (MSW) composting and study the relationship between the mesophilic and thermophilic microbial profiles and enzyme activities. MSW was composted in a bench-scale composting reactor. Parameters including temperature, oxygen uptake rate, numbers of microbial populations (mesophilic and thermophilic bacteria and fungi) and enzyme activities were measured. Results showed higher dehydrogenase activities are related to higher numbers of mesophilic bacteria, while higher phosphatase and urea activities are associated with higher numbers of thermophilic fungi and mesophilic bacteria at the later stage of composting. In addition, results of the correlation analysis indicated significant correlations among enzyme activities and microbial population.

关键词： Composting Microbial Population Enzyme Activity Correlation Analysis

Two potent lipopolysaccharide-binding peptides characterized from frog Bombina maxima

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Two potent lipopolysaccharide-binding peptides characterized...

第十四届生物毒素毒理学术大会暨第一届生物毒素——从生存适应到转化医学专题学术会议

作者： Caifen Guo baiyu zhang Jihong Shen Wen-Hui Lee Department of Urology The First Affiliated Hospital of Kunming Medical University Key Laboratory of Bio-active Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences Kunming Institute of Zoology

Lipopolysaccharide(LPS) is a major pathogen-associated molecular pattern molecule that can initiate lethal *** peptides(AMPs) in the skin secretions of amphibians are essential components of immune system to protect these hosts from different microbial *** present investigation,we identified two LPS-binding peptides from skin secretions of native amphibian Bombina maxima challenged with LPS *** peptides were purified by gel filtration on a superdex peptide 10/300 GL column followed by an HPLC C *** molecular weight and the purity of peptides were analyzed by an Autoflex Speed TOF/TOF mass *** primary structures of the peptides were determined by *** binding activity of peptides with LPS was determined using super streptavidin(SSA) biosensors in the Octet Red 96 *** peptides showed LPS-binding activities,low cytotoxity in vitro and protective effects on LPS-induced sepsis in *** results suggest the peptides are valuable molecules that can interact with LPS and laid the foundation for future research and development.

关键词： Antimicrobial peptides lipopolysaccharide LPS-binding activity

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DVB-S2中三维传输方案

西安电子科技大学学报 2014年第1期41卷 147-152页

作者：邵永庆张白愚黄焱重庆通信学院国家3G研究中心重庆400035 信息工程大学信息系统工程学院河南郑州450002

根据DVB-S2码流自身的特点以及参考二维视频数据的传输,提供了三维视频节目在第2代卫星广播电视标准信道中的3种基于数据链路层传输方式,并给出了相应的发送协议栈.根据每种传输方式的规定,计算了每种情况下码流的传输效率,并进行对比.... 详细信息

根据DVB-S2码流自身的特点以及参考二维视频数据的传输,提供了三维视频节目在第2代卫星广播电视标准信道中的3种基于数据链路层传输方式,并给出了相应的发送协议栈.根据每种传输方式的规定,计算了每种情况下码流的传输效率,并进行对比.综合各种因素,得出每种传输方式都有自己的优缺点和适用范围,任何一方都不能完全被替代.

关键词：第2代卫星广播电视标准三维视频传输方案传输效率

A bHLH Transcription Factor,Associated with PsHint1,May be Required for the Chemotaxis and Pathogenicity of Phytophthora sojae

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A bHLH Transcription Factor,Associated with PsHint1,May be R...

Converting intercalation-type cathode in spent lithium-ion batteries into conversion-type cathode

中国植物病理学会2017年学术年会

作者： Qiu Min zhang baiyu Li Yaling Ye Wenwu Wang Yuanchao Plant Pathology Department Nanjing Agricultural University

Zoospore chemotaxis and early infectionare key stages in the interaction between Phytophthora sojae and its host *** regulation is required for precise gene expression during a series of biological processes including these *** previous studies show that a G-protein a subunitencoded by PsGPA1 regulates the chemotaxis and pathogenicity of *** addition,PsHint1,a histidine triad（HIT） domain-containing protein orthologous to human HIT nucleotide-binding protein 1（HINT1）,interacts with PsGPA1 and exhibited a PsGPAl-like biological function in ***,we noticed that Hint1 could usually inhibit bHLH family transcription factors（TFs） in *** found there were 6 bHLH TFs in ***,and PsbHLH1 showed higher transcription levels during stages of zoospores,cysts,and ***,PsbHLH1 interacts with PsHintl in the GSTPull down *** the basis of CRISPR/Cas9-mediaed gene knock-out,weare focusing on phenotypic analysis for the obtained *** results showed that PsbHLH1 may also be required for the chemotaxis and pathogenicity of ***,playing as a downstream transcriptional regulator in the PsGPAl-associated signaling pathway.

关键词： Phytophthora sojae bHLH transcription factor Chemotaxis Pathogenicity

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Nano Research 2024年第5期17卷 4602-4609页

作者： Dingding Zhu Yong Su Jingzhao Chen Xiangze Ou Xuedong zhang Wen Xie Yuyan Zhou Yunna Guo Qiushi Dai Peng Jia Jitong Yan Lin Geng baiyu Guo Liqiang zhang Yongfu Tang Qiao Huang Jianyu Huang School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066000China

The widespread applications of lithium-ion batteries(LIBs)generate tons of spent ***,recycling LIBs is of paramount importance in protecting the environment and saving the *** commercialized LIBs mostly adopt layered oxides such as LiCoO_(2)(LCO)or LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)(NMC)as the cathode *** the intercalation-type spent oxides into conversion-type cathodes(such as metal fluorides(MFs))offers a valid recycling strategy and provides substantially improved energy densities for ***,two typical Co-based cathodes,LCO and LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NMC622),in spent LIBs were successfully converted to CoF_(2) and(Ni_(x)Co_(y)Mn_(z))F_(2) cathodes by a reduction and fluorination *** as converted CoF_(2) and(Ni_(x)Co_(y)Mn_(z))F_(2) delivered cell energy densities of 650 and 700 Wh/kg,*** atomic-level electron microscopy revealed that the used LCO and NMC622 were converted to highly phase pure Co metal and Ni_(0.6)Co_(0.2)Mn_(0.2) alloys in the used graphite-assisted reduction roasting,simultaneously producing the important product of Li_(2)CO_(3) using only environment friendly *** study provided a versatile strategy to convert the intercalation-type Co-based cathode in the spent LIBs into conversion-type MFs cathodes,which offers a new avenue to recycle the spent LIBs and substantially increase the energy densities of next generation LIBs.

关键词： spent lithium-ion batteries recycling energy densities conversion-type cathode

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环氧乙烷的生产现状及其应用

广东石油化工学院学报 1992年第1期15卷 13-19页

作者：张白瑜

本文就我国环氧乙烷的生产现状及其应用作一介绍。在此基础上,对茂名地区环氧乙烷衍生物产品的开发提出一些建议。

关键词：环氧乙烷乙二醇表面活性剂精细化工