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平台经营者管理权的滥用与规范进路

南昌大学学报（人文社会科学版） 2024年第4期55卷 93-104页

作者：冷传莉王宗峰贵州大学法学院贵州贵阳550025

数字时代平台经营者的角色定位已然由市场工具人向组织化的管理者转变,具有自律管理的法定职能。然而,平台经营者营利主体与管理主体的身份复合造成其在缔约与履约的过程中暗藏难以被有效识别且规制有限的权利滥用。主要原因在于:平台... 详细信息

数字时代平台经营者的角色定位已然由市场工具人向组织化的管理者转变,具有自律管理的法定职能。然而,平台经营者营利主体与管理主体的身份复合造成其在缔约与履约的过程中暗藏难以被有效识别且规制有限的权利滥用。主要原因在于:平台经营者的私主体面相与行为公共性的冲突、管理规则的私法自治与缔约商谈环境缺失的冲突和管理行为受原则性规范引导与包容审慎监管。为维护良善的平台商业生态,平台经营者应肩负起角色责任,根据《中华人民共和国公司法》第十九、二十条的规定,细化企业社会责任。在程序层面上,构造平台服务的选择渠道,强化平台用户话语权。在实体层面上,管理行为需要接受司法审查,行权措施应当符合禁止权利滥用规范。

关键词：平台经营者管理权营利性社会责任禁止权利滥用

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初中语文教师小说文本解读能力的建构

教学与管理 2024年第31期 41-44页

作者：何占涛冷莉渤海大学文学院辽宁锦州121013 蒙古研究大学教育学院蒙古乌兰巴托14200

新课程标准关于小说文本的解读要求包括明确文体、关注传统文化、培养审美感受、发现教学话题、传授解读方法。结合小说文本的具体情况,可以把文本解读视角归纳为作者视角、读者视角、研究者视角、人物视角四个方面。在此基础上,总结出... 详细信息

新课程标准关于小说文本的解读要求包括明确文体、关注传统文化、培养审美感受、发现教学话题、传授解读方法。结合小说文本的具体情况,可以把文本解读视角归纳为作者视角、读者视角、研究者视角、人物视角四个方面。在此基础上,总结出初中语文教师小说文本解读能力建构的主要途径与方法:研读课标明要求、观摩案例学方法、质疑中的新尝试、多意图下的揣摩性挖掘。

关键词：新课标初中语文教师小说文本解读视角解读能力

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林甸鸡腹部脂肪组织发育规律探究

东北农业大学学报 2024年第2期55卷 41-48页

作者：刘捷周迅韩雪周世杰李玉茂栾鹏李辉王宇祥冷丽农业农村部鸡遗传育种重点实验室哈尔滨150030 黑龙江省普通高等学校动物遗传育种与繁殖重点实验室哈尔滨150030 东北农业大学动物科学技术学院哈尔滨150030

肉鸡生产过程中腹脂过度沉积会造成生产效率下降等一系列问题。林甸鸡作为优质地方鸡种之一,产蛋、产肉性能优良,肉质鲜美,深受大众喜爱。为探究林甸鸡腹部脂肪组织发育规律,测定林甸鸡3~22周龄体重及腹脂重,观察并统计腹部脂肪细胞大... 详细信息

肉鸡生产过程中腹脂过度沉积会造成生产效率下降等一系列问题。林甸鸡作为优质地方鸡种之一,产蛋、产肉性能优良,肉质鲜美,深受大众喜爱。为探究林甸鸡腹部脂肪组织发育规律,测定林甸鸡3~22周龄体重及腹脂重,观察并统计腹部脂肪细胞大小和数量,分析脂肪细胞特性与腹脂沉积之间关系。结果表明,林甸鸡在3~22周龄体重持续增长,腹脂重先升后降再升,腹脂率先降后升;3~10周龄脂肪细胞以增生为主,10~14周龄脂肪细胞以增大占优,19周龄后脂肪细胞增大和增生同时进行,但以增大为主。研究初步确定腹脂重与脂肪细胞特性回归模型,发现脂肪细胞体积对腹脂重的影响最大。试验结果为选育优质特色林甸鸡新品系提供理论参考。

关键词：林甸鸡腹脂脂肪细胞发育规律

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弯曲疲劳下碳纤维复合材料的剩余模量研究

纤维复合材料 2024年第1期41卷 30-35页

作者：谢俊于洪浩冷利张罡沈阳理工大学材料科学与工程学院沈阳110159

碳纤维复合材料具有优异的力学性能,在航空航天及地面交通运输领域得到了广泛的应用。应用在车辆上的碳纤维复合材料在车辆长时间的行驶过程中,会受到交变载荷的作用,导致其性能下降从而影响复合材料的使用寿命。本文选用692-3K型环氧... 详细信息

碳纤维复合材料具有优异的力学性能,在航空航天及地面交通运输领域得到了广泛的应用。应用在车辆上的碳纤维复合材料在车辆长时间的行驶过程中,会受到交变载荷的作用,导致其性能下降从而影响复合材料的使用寿命。本文选用692-3K型环氧树脂为基体,24K-T300碳纤维为增强体,采用VARTM的方法制备碳纤维树脂基复合材料板,对三种不同铺层层数的复合材料板进行静态弯曲试验,得到在6层铺层下的极限弯曲应力为572.9 MPa。采用20Hz频率和50%载荷水平对复合材料进行三点弯曲疲劳试验,探究了复合材料在循环周次逐渐增加的过程中的剩余模量变化。随着循环周次的增加,弹性模量呈现先降低再升高的趋势,然而循环周次进一步的增加并没有导致弹性模量升高,反而导致下降。这表明循环周次对弹性模量存在影响。进一步研究发现,复合材料内部存在部分尚未完全固化的树脂,推测这部分未固化树脂在疲劳循环过程中吸收热量开始固化从而修复了疲劳循环过程中产生的微裂纹,这是导致弹性模量出现先下降后上升趋势的原因。

关键词：复合材料弯曲性能疲劳性能剩余模量

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Observations of carbon–carbon coupling of 4,4''-dibromo-p-terphenyl on Cu(110) surface at molecular level

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Chinese Chemical Letters 2017年第1期28卷 24-28页

作者： Xin-li leng li-li Song Yan Lu Xiao-Qing liu li Wang Department of Physics Nanchang University Nanchang 330031 China Department of Chemistry Nanchang University Nanchang 330031 China

The carbon–carbon couplings of 4,4＇＇-dibromo-p-terphenyl（DBTP） on Cu（110） surface have been investigated at a single molecular level by scanning tunneling microscopy. After annealing at 353 K, a mixture of parallel non-organometallic and organometallic intermediates of DBTP molecules along the[1–10] direction of the surface has been observed. Further annealing at 393 K causes one group of molecules to form oligomers with para-para and para-meta motifs via Ullmann reaction and the other group of molecules to synthesize oligomers with meta-meta motifs via direct carbon–carbon coupling reaction. Statistical results directly reveal that the occurrence of reaction type is strongly related to the initial binding configuration of DBTP molecules.

关键词： Carbon-carbon coupling Ullmann coupling Organometallic intermediate Selective C-H activation Oligomer

Enhanced recycling performance of bimetallic Ir-Re/SiO_(2) catalyst by amberlyst-15 for glycerol hydrogenolysis

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Chinese Journal of Chemical Engineering 2022年第5期35卷 171-181页

作者： Xin Ren li leng Yueqiang Cao Jing Zhang Xuezhi Duan Xueqing Gong Jinghong Zhou Xinggui Zhou State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China Key Laboratory for Advanced Materials Centre for Computational Chemistry and Research Institute of Industrial CatalysisEast China University of Science and TechnologyShanghai 200237China

Recycling performance of heterogeneous catalysts is of crucial importance especially for a batch reaction *** this work,we demonstrate a strategy for enhancing recycling performance of Ir-Re/SiO_(2) catalyst synergized with amberlyst-15 in glycerol hydrogenolysis to produce 1,*** characterization results reveal that the Re sites in the Ir-Re/SiO_(2) catalyst undergo irreversible segregation and *** hinder the formation of active ReAOH species and thus contribute to a complete and irreversible ***,the introduction of amberlyst-15 into the reactant mixture can restrain the oxidation process of Re sites and favor the formation of ReAOH species,and thus significantly enhance the catalytic recycling *** results demonstrated here could guide the development of excellent bimetallic catalysts with the desirable recycling performances for the reaction.

关键词： Glycerol hydrogenolysis Ir-Re/SiO_(2)catalyst Deactivation mechanism Recycling performance Amberlyst-15 promoter

HBP1 inhibits chicken preadipocyte differentiation by activating the STAT3 signaling via directly enhancing JAK2 expression

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Journal of Integrative Agriculture 2022年第6期21卷 1740-1754页

作者： CHEN Hong-yan CHENG Bo-han MA Yan-yan ZHANG Qi leng li WANG Shou-zhi li Hui Key Laboratory of Chicken Genetics and Breeding Ministry of Agriculture and Rural AffairsHarbin 150030P.R.China Key Laboratory of Animal Genetics Breeding and ReproductionEducation Department of Heilongjiang ProvinceHarbin 150030P.R.China College of Animal Science and Technology Northeast Agricultural UniversityHarbin 150030P.R.China

Obesity presents a serious threat to human health and broiler *** expansion of adipose tissue is mainly regulated by the differentiation of *** differentiation of preadipocytes is a complex biological process regulated by a variety of transcription factors and signaling *** studies have shown that the transcription factor HMG-box protein 1(HBP1)can regulate the differentiation of mouse 3T3-L1 preadipocytes by activating the Wnt/β-catenin signaling ***,it is unclear whether HBP1 involved in chicken preadipocyte differentiation and which signaling pathways it *** aim of the current study was to explore the biological function and molecular regulatory mechanism of HBP1 in the differentiation of chicken *** expression patterns of chicken HBP1 in abdominal adipose tissue and during preadipocyte differentiation were analyzed by RT-qPCR and Western *** preadipocyte stably overexpressing HBP1 or knockout HBP1 and their control cell line were used to analyze the effect of HBP1 on preadipocyte differentiation by oil red O staining,RT-qPCR and Western *** 45-Pathway Reporter Array was used to screen the signal pathways that HBP1 regulates in the differentiation of chicken *** inhibitor and siRNA for signal transducer and activator of transcription 3(STAT3)were used to analyze the effect of STAT3 on preadipocyte *** preadipocyte stably overexpressing HBP1 was transfected by the siRNA of STAT3 or treated with a chemical inhibitor of STAT3 for the rescue *** results of gene expression analysis showed that the expression of HBP1 was related to abdominal fat deposition and preadipocyte differentiation in *** results of function gain and loss experiments indicated that overexpression/knockout of HBP1 in chicken preadipocytes could inhibit/promote(Plipid droplet deposition and the expression of adipogenesis-related ***,HB

关键词： chicken HBP1 preadipocyte differentiation STAT3 signaling pathway

Zinc finger protein 139 expression in gastric cancer and its clinical significance

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World Journal of Gastroenterology 2014年第48期20卷 18346-18353页

作者： Yong li Qun Zhao li-Qiao Fan li-li Wang Bi-Bo Tan Yan-li leng Yu liu Dong Wang Department of General Surgery The Fourth Hospital Hebei Medical University

AIM: To investigate the expression of zinc finger protein 139 (ZNF139) in gastric cancer (GC), and to analyze its clinical significance.

关键词： Apoptosis Clinicopathologic characteristics Gastric cancer Prognosis Zinc finger protein 139

NUMERICAL SIMULATION OF FLOW AND HEAT TRANSFER CHARA-CTERISTICS OUTSIDE A PERIODICALLY VIBRATING TUBE

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Journal of Hydrodynamics 2008年第5期20卷 629-636页

作者： JIANG Bo TIAN Mao-cheng leng Xue-li TANG Yu-feng PAN Ji-hong School of Energy Source and Power Engineering Shandong University Jinan 250061 China

Fluid flow and heat transfer characteristics outside a vibrating tube were numerically simulated by the dynamic mesh method. The mechanism of heat transfer enhancement via periodic vibration of the tube was explored by using the field synergy principle. It is found that the field synergy angle between fluid velocity vector and temperature gradient vector for a periodically vibrating tube is significantly smaller than that for a stationary tube, and it changes approximately according to the sinusoidal law in a vibration period. The effect of time phase of the vibration on the field synergy angle and convective heat transfer coefficient were also discussed. Results indicate that the vibration can enhance heat transfer and this effect is more remarkable when time phase angle ranges between 50° and 1400 in a half period. Especially when the time phase angle is 90°, the average field synergy angle outside the tube reaches the minimum, which leads to the best heat transfer performance.

关键词： heat transfer enhancement dynamic mesh vibration field synergy Computational Fluid Dynamics (CFD)