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CAPACITY ALLOCATION IN A COMPETITIVE MULTI-CHANNEL SUPPLY CHAIN

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Journal of Systems Science and Systems Engineering 2007年第4期16卷 450-468页

作者： Kaijun liu zigang ZHANG School of Management Huazhong University of Science and Technology Wuhan 430074 China

This paper addresses the capacity allocation problem for a capacitated manufacturer who can distribute her product to the end customers through an independent retailer channel as well as through her direct channel. Demands of the channels are substitutable, which induces competition between them. We show that to avoid channel competition, it is possible for the manufacturer to deny the retailer of capacity. Specifically, if channel substitution rate is high, a retailer of low demand will never be allocated any capacity even when the available capacity is ample. While, if the channel substitution rate is low, capacity allocation strategy depends on the retailer＇s demand and the available capacity. Many other interesting managerial insights are provided and illustrated with numerical examples.

关键词： E-supply chain management capacity allocation demand substitution multi-channel supply chain

Estimation of Storage and Density of Organic Carbon in Peatlands of China

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Chinese Geographical Science 2012年第6期22卷 637-646页

作者： liu zigang WANG Ming MA Xuehui School of Environment and Natural Resources Renmin University of China Beijing 100872 China Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130102 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Based on the results of the National Survey of Peat Resources(1983-1985) and the investigation results on the peatlands of China,the storage and density of the organic carbon in the peatlands of China were *** total organic carbon storage(OCS) of the peatlands in China,including bare peatlands and buried peatlands,are 1.503 × 109 t,unevenly distributed over 30 provincial level administrative units and 16 climatic *** organic carbon storage(POCS) in Sichuan(6.45 × 108 t) and Yunnan provinces(2.91 × 108 t) is the highest,accounting for 62.29% of the total *** zone of plateau has the highest POCS of 7.14 × 108 t,especially in the Zoigê Plateau,where the POCS is 6.30 × 108 t,accounting for 41.92% of the total POCS of *** organic carbon density(OCD) of the peatlands in China mostly ranges from 80 kg/m3 to 140 kg/m3,and the range of the maximum is 270-360 kg/m3,and the minimum is less than 80 kg/*** by the Yanshan Mountain,Taihang Mountains and Hengduan Mountains,the peatland oganic carbon density(POCD) is lower on the northwestern side than that on the southeastern *** Province has the highest POCD due to the ancient buried *** OCD of the bare peatlands is mostly in the range of 60-150 kg/m3,and that of the buried peatlands is more than 100 kg/*** the bare peatlands,the OCD generally increases from the surface layer to the below surface layer,and then decreases with the *** the peatlands area in China is small,the OCS per unit area is far higher than the other soil types,so peatlands protection can effectively mitigate climate change.

关键词： peatlands organic carbon storage organic carbon density China

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大熔覆速率TIG焊研究现状与展望

热加工工艺 2024年第1期53卷 12-16页

作者：刘自刚张建峰钱雪娇叶佳城孙仲侃诺力智能装备股份有限公司浙江省智能物流装备工程技术研究中心浙江湖州313100 长兴瑷晟环保科技有限公司浙江湖州313100

TIG焊具有焊接电弧稳定,焊缝成形美观,焊接过程无飞溅等优点,但也存在熔覆速率低的缺点。本文总结了热丝TIG焊、TOP-TIG焊、TIP-TIG焊、双钨极TIG焊、窄间隙TIG焊等几种提高TIG焊熔覆速率的高效TIG焊接方法,归纳了这几种大熔覆速率TIG... 详细信息

TIG焊具有焊接电弧稳定,焊缝成形美观,焊接过程无飞溅等优点,但也存在熔覆速率低的缺点。本文总结了热丝TIG焊、TOP-TIG焊、TIP-TIG焊、双钨极TIG焊、窄间隙TIG焊等几种提高TIG焊熔覆速率的高效TIG焊接方法,归纳了这几种大熔覆速率TIG焊接方法存在的问题,并展望了未来的发展方向。

关键词：热丝TIG焊 TOP-TIG焊 TIP-TIG焊窄间隙TIG焊

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强冬性和春性甘蓝型油菜变种间杂种优势分析

核农学报 2024年第5期38卷 833-841页

作者：王莹郑国强董小云李辉魏家萍崔俊美武泽峰刘自刚甘肃农业大学农学院/省部共建干旱生境作物学国家重点实验室/甘肃省作物遗传改良与种质创新重点实验室甘肃兰州730070

为了研究甘蓝型强冬性与春性油菜变种间亲本组配的杂交组合之间的杂种优势表现,选用8个强冬性甘蓝型油菜和4个春性甘蓝型油菜作为研究材料,组配杂交组合,分析亲本及F1的杂种优势强/弱。结果表明,冬×春组合的F1生育期较冬性亲本明显缩短... 详细信息

为了研究甘蓝型强冬性与春性油菜变种间亲本组配的杂交组合之间的杂种优势表现,选用8个强冬性甘蓝型油菜和4个春性甘蓝型油菜作为研究材料,组配杂交组合,分析亲本及F1的杂种优势强/弱。结果表明,冬×春组合的F1生育期较冬性亲本明显缩短;在冬×春组合中,株高、分枝部位、主花序长度、角果长度和单株有效角果数等方面有较强的杂种优势,其中角果长度(超亲优势:10.61%,杂种优势指数:128.81%)和单株有效角果数(超亲优势:17.31%,杂种优势指数:143.92%)杂种优势最为明显。结合杂种表现和杂种优势结果,说明甘蓝型油菜变种间杂交比种内杂交具有更明显的杂种优势表现,并且角果长度和单株有效角果数的超亲优势和杂种优势指数最高。本研究结果为今后研究甘蓝型油菜变种间杂种优势的研究利用提供了基础。

关键词：甘蓝型油菜杂种优势变种间杂种农艺性状

干旱环境下油菜籽粒芥酸含量的QTL定位分析

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干旱地区农业研究 2024年第3期42卷 53-59页

作者：党林学董小云郑国强王莹王小霞巩永杰魏家萍崔俊美武泽峰方彦赵彩霞刘自刚庄浪县农技推广中心甘肃平凉744000 省部共建干旱生境作物学国家重点实验室/甘肃农业大学农学院甘肃兰州730070 西藏自治区农牧科学院农业研究所西藏拉萨850030

为探讨干旱环境下冬油菜籽粒品质(脂肪酸含量和硫苷)分子遗传机理,以17NTS57(高芥酸)×CY12PXW-6-1(低芥酸)的衍生后代F_(1)、F_(2)、F_(2∶3)等群体为材料,结合天水和定西试点籽粒品质表型,进行干旱环境下籽粒芥酸的遗传定位及选择标... 详细信息

为探讨干旱环境下冬油菜籽粒品质(脂肪酸含量和硫苷)分子遗传机理,以17NTS57(高芥酸)×CY12PXW-6-1(低芥酸)的衍生后代F_(1)、F_(2)、F_(2∶3)等群体为材料,结合天水和定西试点籽粒品质表型,进行干旱环境下籽粒芥酸的遗传定位及选择标记开发。结果表明:利用F_(2∶3)群体在两个试点共检测到油菜芥酸含量QTL位点7个,其中天水试点检测到4个,定西试点检测到3个。天水试点检测到2个主效QTL,即qEATC08.2、qEATC09,分别分布在C08、C09染色体,其表型贡献率在20%以上;qEATA10(天水)和qEADA10(定西)被定位到A10染色体相同区间,在两个试点的表型贡献分别为10.42%和12.70%;qEATC09和qEADC09被定位在C09染色体相同区间,两个试点的表型贡献率分别为20.00%和19.34%,为共定位主效QTL。3个QTL(qEATC08.1(天水)、qEATC08.2(天水)、qEADC07(定西))仅各在一个试点被检测到,其中2个微效修饰位点(qEATC08.1和qEADC07)具有正向加性效应。在A10和C09染色体上定位的qEA.A10和qEA.C09的主效QTL,这些标记可用于干旱条件下油菜籽粒芥酸含量改良的分子标记辅助选择。

关键词：冬油菜干旱环境芥酸 QTL定位

Protein translation:biological processes and therapeutic strategies for human diseases

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Signal Transduction and Targeted Therapy 2024年第3期9卷 1048-1064页

作者： Xuechao Jia Xinyu He Chuntian Huang Jian Li zigang Dong Kangdong liu Department of Pathophysiology School of Basic Medical SciencesAcademy of Medical SciencesZhengzhou UniversityZhengzhouHenan 450000China China-US(Henan)Hormel Cancer Institute ZhengzhouHenan 450000China Department of Pathology and Pathophysiology Henan University of Chinese MedicineZhengzhouHenan 450000China Tianjian Laboratory of Advanced Biomedical Sciences ZhengzhouHenan 450052China Research Center for Basic Medicine Sciences Academy of Medical SciencesZhengzhou UniversityZhengzhou 450052 HenanChina Provincial Cooperative Innovation Center for Cancer Chemoprevention Zhengzhou UniversityZhengzhouHenan 450000China State Key Laboratory of Esophageal Cancer Prevention and Treatment Zhengzhou UniversityZhengzhouHenan 450000China The Collaborative Innovation Center of Henan Province for Cancer Chemoprevention ZhengzhouHenan 450000China

Protein translation is a tightly regulated cellular process that is essential for gene expression and protein *** deregulation of this process is increasingly recognized as a critical factor in the pathogenesis of various human *** this review,we discuss how deregulated translation can lead to aberrant protein synthesis,altered cellular functions,and disease *** explore the key mechanisms contributing to the deregulation of protein translation,including functional alterations in translation factors,tRNA,mRNA,and ribosome *** translation leads to abnormal protein expression,disrupted cellular signaling,and perturbed cellular functions-all of which contribute to disease *** development of ribosome profiling techniques along with mass spectrometry-based proteomics,mRNA sequencing and single-cell approaches have opened new avenues for detecting diseases related to translation ***,we highlight recent advances in therapies targeting translation-related disorders and their potential applications in neurodegenerative diseases,cancer,infectious diseases,and cardiovascular ***,the growing interest lies in targeted therapies aimed at restoring precise control over translation in diseased cells is *** conclusion,this comprehensive review underscores the critical role of protein translation in disease and its potential as a therapeutic *** in understanding the molecular mechanisms of protein translation deregulation,coupled with the development of targeted therapies,offer promising avenues for improving disease outcomes in various human ***,it will unlock doors to the possibility of precision medicine by offering personalized therapies and a deeper understanding of the molecular underpinnings of diseases in the future.

关键词： translation offering precise

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黑龙江省三江平原湿地土壤碳储量变化

清华大学学报（自然科学版） 2005年第6期45卷 788-791页

作者：刘子刚张坤民中国人民大学环境学院北京100872 清华大学环境科学与工程系北京100084

为湿地保护和减缓全球气候变化政策的制定提供科学依据,根据对黑龙江省三江平原不同类型和不同开垦年限的湿地土壤有机碳含量、土壤视密度、土层厚度和面积的测量结果,估算土壤碳储量及农业开发50a以来的碳储量变化。对不同土壤类型碳... 详细信息

为湿地保护和减缓全球气候变化政策的制定提供科学依据,根据对黑龙江省三江平原不同类型和不同开垦年限的湿地土壤有机碳含量、土壤视密度、土层厚度和面积的测量结果,估算土壤碳储量及农业开发50a以来的碳储量变化。对不同土壤类型碳密度随时间的变化,用回归分析的方法,建立土壤碳密度变化模型。结果显示,湿地开发初期20a碳密度降低很快,之后逐渐趋于平稳。三江平原的湿地土壤是一个重要的有机碳库,其有机碳储量为621Mt,该区湿地土壤碳储量随耕地面积的增加而减少。人类活动导致的湿地丧失和退化、水土流失和不合理的耕作措施等是土壤碳储量减少的主要原因。

关键词：碳储量碳密度三江平原湿地土壤有机碳库(SOC)

基于生态足迹法的区域水生态承载力研究——以浙江省湖州市为例

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资源科学 2011年第6期33卷 1083-1088页

作者：刘子刚郑瑜中国人民大学环境学院北京100872

本文初步界定了水生态足迹和水生态承载力的内涵,将水生态足迹分为水产品生态足迹、水资源生态足迹与水污染生态足迹,并建立了水生态足迹模型。其中,采用了Wackemagel的水产品生态足迹模型;水资源生态足迹采用了基于水资源消耗量的计算... 详细信息

本文初步界定了水生态足迹和水生态承载力的内涵,将水生态足迹分为水产品生态足迹、水资源生态足迹与水污染生态足迹,并建立了水生态足迹模型。其中,采用了Wackemagel的水产品生态足迹模型;水资源生态足迹采用了基于水资源消耗量的计算模型;采用零维模型计算污染稀释净化需水量,构建水污染生态足迹模型。最后,以扣除60%生态需水为前提建立了水生态承载力计算模型。以浙江省湖州市为例,模型计算了湖州市2000年-2007年水生态足迹和水生态承载力,结果显示,湖州市2000年-2007年水生态承载力超过水生态足迹,呈现生态盈余,但是水生态承载力波动较大,水生态足迹在不断增大;由于水产品的消费量逐年增大,水产品生态足迹在水生态足迹中所占比例也相应增大。

关键词：生态足迹水生态承载力水资源生态足迹水污染生态足迹湖州市

不同贮藏温度对桔梗花粉生活力及授粉结实能力的影响

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热带作物学报 2011年第5期32卷 956-959页

作者：刘自刚商洛学院生物医药工程系陕西商洛726000

以ME3+BK+100 g/L蔗糖+150 g/L PEG4000作为培养基,把桔梗新鲜花粉在不同的温度下进行培养,结果表明,30℃培养1.5 h为花粉萌发和花粉管生长的最佳培养条件。把桔梗花粉贮藏在不同的温度下,结果显示:低温贮藏可明显延长花粉的寿命,常温... 详细信息

以ME3+BK+100 g/L蔗糖+150 g/L PEG4000作为培养基,把桔梗新鲜花粉在不同的温度下进行培养,结果表明,30℃培养1.5 h为花粉萌发和花粉管生长的最佳培养条件。把桔梗花粉贮藏在不同的温度下,结果显示:低温贮藏可明显延长花粉的寿命,常温下花粉仅能贮藏4 d左右,但在10、4、-20℃下贮藏,花粉寿命可分别达60、90、150 d以上;随着贮藏时间的延长,花粉的授粉结实率均呈下降趋势,但低温贮藏可明显减缓结实率下降的速度。

关键词：桔梗花粉贮藏温度生活力结实率