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Numerical Investigation on Characteristics of Supercritical CO_(2)Heat Transfer in Vertical Circular Tubes with Circumferentially Half-Side Heating

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Journal of Thermal Science 2024年第5期33卷 1744-1756页

作者： zhang Yan zhang xinyi YAN Chenshuai WU Wenhua GAO Erman School of Energy and Power Engineering Northeast Electric Power UniversityJilin 132012China

The design of heat exchangers in the advanced supercritical power conversion system cannot be separated from the study of heat transfer ***-side heating mode is often encountered for solar receiver and supercritical ***,the characteristics of supercritical CO_(2)(sCO_(2))convection heat transfer in vertical tubes with circumferentially half-side heating was numerically investigated through the SST k-ωturbulent model which matches well with the experimental ***,heat transfer between sCO_(2)upflow and downflow was *** to film boiling heat transfer at subcritical pressure,numerical results were processed according to the supercritical pseudo-phase transition hypothesis,with liquid-like phase in the tube core region and vapor-like film in the region near the heated tube *** structure of two layers was demarcated by pseudo-critical temperature T_(pc).Therefore,sCO_(2)heat transfer was assessed according to double thermal resistances caused by vapor-like film near the wall and core liquid-like *** findings suggest that wall temperature for upflow is higher than that for downflow,which is attributed to larger thermal resistance in the fluid domain for upflow than that for *** difference guarantees the excellent heat transfer performance for downflow than *** is also further concluded that the formation of vapor-like film near the wall due to pseudo-phase transition plays a key role in dominating wall temperature and inducing heat transfer deterioration in half-side heating *** present contribution is significant to the design of supercritical heat exchanger under half-side heating mode.

关键词： supercritical CO_(2) pseudo-phase transition half-side heating thermal resistance flow direction

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Highly selective photocatalytic oxidation of methane to methyl hydroperoxide

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Nano Research 2024年第4期17卷 2473-2480页

作者： Chunling Bo Li zhang Xiaolong Liu Huaiqiu Chang Yingxue Sun xinyi zhang Ting Tan Lingyu Piao National Center for Nanoscience and Technology Beijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China

Partial oxidation of methane into primary oxidation products with high value remains a *** this work,photocatalytic oxidation of methane(CH_(4))with high methyl hydroperoxide(CH_(3)OOH)selectivity is achieved using pure titanium oxide(TiO_(2))without any cocatalyst at room temperature and atmospheric *** CH_(3)OOH production rate can reach up to 2050±88μmol·g^(-1)·h^(-1) at pH≈7.0 with 100%selectivity in the liquid *** stable reaction cycle can reach more than 30 *** low-cost system achieves superior CH_(4) conversion activity and selectivity compared with similar *** energy of hydrogen peroxide(H_(2)O_(2))to adsorbed hydroperoxyl radical(^(*)OOH)has a significantly lower reaction energy than conversion to adsorbed hydroxyl radical(*OH)on the(210)surface of the TiO_(2).The^(*)OOH preferentially combines with methyl radical(·CH_(3))to form the most energetically favorable CH_(3)*** mild oxidative environment of this system prevents the reduction of CH_(3)OOH to CH_(3)OH or over-oxidation of CH_(4),which ensures the final CH_(3)OOH with high selectivity and *** work provided a low-cost but highly efficient method to achieve partial oxidation with superior selectivity,i.e.,to convert CH_(4) into high-value chemicals.

关键词： photocatalytic methane oxidation methyl hydroperoxide titanium oxide

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Comparative studies between humans and golden Syrian hamsters via thromboelastography

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Animal Models and Experimental Medicine 2024年第4期7卷 570-577页

作者： Ze Yang Lili Xie Jingjing Ba Simin Zan Letong zhang xinyi zhang Yang Yu School of Laboratory Animal&Shandong Laboratory Animal Center Shandong First Medical University&Shandong Academy of Medical SciencesJinanChina The Second Affiliated Hospital of Shandong First Medical University TaianChina

Background:Thromboelastography(TEG)is a widely utilized clinical testing method for real-time monitoring of platelet function and the thrombosis *** metab-olism disorders are crucial risk factors for *** lipid metabolism charac-teristics of hamsters resemble those of humans more closely than mice and rats,and their relatively large blood volume makes them suitable for studying the mechanisms of thrombosis related to plasma lipid *** blood samples from golden Syrian hamsters and healthy humans were obtained following standard clinical *** was employed to evaluate coagulation factor function,fibrinogen(Fib)function,platelet function,and the fibrinolytic ***:The whole blood from hamster or healthy human was isolated following the clinical procedure,and TEG was employed to evaluate the coagulation factor func-tion,Fib function,platelet function,and fibrinolytic *** analysis used ACLTOP750 automatic coagulation analysis *** routine testing used XN-2000 automatic blood ***:TEG parameters revealed that hamsters exhibited stronger coagulation fac-tor function than humans(reaction time[R],p=0.0117),with stronger Fib function(alpha angle,p<0.0001;K-time[K],p<0.0001).Platelet function did not differ signifi-cantly(maximum amplitude[MA],p=0.077).Hamsters displayed higher coagulation status than humans(coagulation index[CI],p=0.0023),and the rate of blood clot dissolution in hamsters differed from that in humans(percentage lysis 30 min after MA,p=0.02).Coagulation analysis parameters indicated that prothrombin time(PT)and activated partial thromboplastin time(APTT)were faster in hamsters than in hu-mans(PT,p=0.0014;APTT,p=0.03),whereas the Fib content was significantly lower in hamsters than in humans(p<0.0001).No significant difference was observed in thrombin time(p=0.1949).Conclusions:In summary,TEG could be used to evaluate thrombosis and bleeding parameters in whole blood samples

关键词： platelet function Syrian hamster thromboelastography(TEG) thrombosis

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Comparative studies between humans and golden Syrian hamsters via thromboelastography

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Animal Models and Experimental Medicine 2024年第04期 570-577页

作者： Ze Yang Lili Xie Jingjing Ba Simin Zan Letong zhang xinyi zhang Yang Yu School of Laboratory Animal & Shandong Laboratory Animal Center Shandong First Medical University & Shandong Academy of Medical Sciences The Second Affiliated Hospital of Shandong First Medical University

Background : Thromboelastography(TEG) is a widely utilized clinical testing method for real-time monitoring of platelet function and the thrombosis process. Lipid metabolism disorders are crucial risk factors for thrombosis. The lipid metabolism characteristics of hamsters resemble those of humans more closely than mice and rats, and their relatively large blood volume makes them suitable for studying the mechanisms of thrombosis related to plasma lipid mechanisms. Whole blood samples from golden Syrian hamsters and healthy humans were obtained following standard clinical procedures. TEG was employed to evaluate coagulation factor function, fibrinogen(Fib)function, platelet function, and the fibrinolytic *** : The whole blood from hamster or healthy human was isolated following the clinical procedure, and TEG was employed to evaluate the coagulation factor function, Fib function, platelet function, and fibrinolytic system. Coagulation analysis used ACLTOP750 automatic coagulation analysis pipeline. Blood routine testing used XN-2000 automatic blood *** : TEG parameters revealed that hamsters exhibited stronger coagulation factor function than humans(reaction time [R], p = 0.0117), with stronger Fib function(alpha angle, p < 0.0001; K-time [K], p < 0.0001). Platelet function did not differ significantly(maximum amplitude [MA], p = 0.077). Hamsters displayed higher coagulation status than humans(coagulation index [CI], p = 0.0023), and the rate of blood clot dissolution in hamsters differed from that in humans(percentage lysis 30 min after MA, p = 0.02). Coagulation analysis parameters indicated that prothrombin time(PT)and activated partial thromboplastin time(APTT) were faster in hamsters than in humans(PT, p = 0.0014; APTT, p = 0.03), whereas the Fib content was significantly lower in hamsters than in humans( p < 0.0001). No significant difference was observed in thrombin time( p = 0.1949).Conclusions : In summary, TEG could be used to evalu

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Exploring biofilm-forming molecular determinants in Listeria monocytogenes by comparative genome-wide and transcriptomic analyses

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Food Science and Human Wellness 2024年

作者： xinyi zhang Changzheng Shi Zhaoxin Lu Fanqiang Meng Moutong Chen Xiaomei Bie College of Food Science and Technology， Nanjing Agricultural University Guangdong Provincial Key Laboratory of Microbial Safety and Health， State Key Laboratory of Applied Microbiology Southern China， Institute of Microbiology， Guangdong Academy of Sciences

In the food industry， bacterial cells usually adhere to equipment surfaces， forming biofilms that may cause persistent contamination. This study aimed to identify the key genes responsible for the stronger biofilm-forming capability of the LMB 33426 strain compared to that of the CICC 21662 strain through comparative genomics. Additionally， the expression of genes and related metabolic pathways of LMB 33426 and CICC 21662 strains were analyzed at the transcriptional level by high-throughput sequencing technology to uncover key differentially expressed genes between planktonic and biofilm cells of those two strains. Subsequently， the key genes found to present differences that were uncovered by those genome-wide and transcriptomic analyses were used to construct gene deletion strains. The crystalline violet assay and motility assay showed that GL002291， GL002712 and lmo1438 genes were involved in the regulation of biofilm formation as well as motility. The hydrophobicity and auto-aggregation ability assay results demonstrated an association between the clpB， lmo1438， and lmo0294 genes and bacterial adhesion. However， no significant differences were found regarding this association in the GL002291 and GL002712 genes. This study elucidates some potential regulatory genes associated with biofilm formation in L. monocytogenes， and laying a theoretical foundation for future research.

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The Association Between Preserved Ratio Impaired Spirometry and Mortality –– 10 CKB Study Areas, China, 2004–2022

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China CDC weekly 2024年第43期6卷 1120-1125,I0003页

作者： Yalei Ke xinyi zhang Dianjianyi Sun Pei Pei Huaidong Du Yiping Chen Ling Yang Xiaoming Yang Kang Wang Junshi Chen Zhengming Chen Jun Lv Liming Li Canqing Yu Department of Epidemiology and Biostatistics School of Public HealthPeking University Health Science CenterBeijingChina Peking University Center for Public Health and Epidemic Preparedness&Response BeijingChina Key Laboratory of Epidemiology of Major Diseases(Peking University) Ministry of EducationBeijingChina Clinical Trial Service Unit&Epidemiological Studies Unit(CTSU) Nuffield Department of Population HealthUniversity of OxfordOxfordUK Shibei Center for Disease Control and Prevention Qingdao CityShandong ProvinceChina China National Center for Food Safety Risk Assessment BeijingChina State Key Laboratory of Vascular Homeostasis and Remodeling Peking UniversityBeijingChina.

What is already known about this topic?China has the world’s most significant public health and economic burden of chronic respiratory ***,the association between preserved ratio impaired spirometry(PRISm)and mortality risk is *** is added by this report?The PRISm group exhibited a 37%higher risk of allcause mortality than the normal group,and the risks of death from cardiovascular diseases,neoplasms,respiratory diseases,and infectious and parasitic diseases were also increased in ***,the presence of respiratory symptoms or disease was associated with an increased risk of mortality in *** are the implications for public health practice?It is imperative to enhance public awareness of PRISm and to implement measures to facilitate the regression of PRISm toward normal lung function.

关键词： function. impaired neoplasms

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盘扣及其在服装中的应用

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毛纺科技 2024年第2期52卷 52-58页

作者：邹平张新翊辽东学院纺织服装学院辽宁丹东118003

盘扣为服装服饰品之一,是一种中国结。针对盘扣分类及其在服装中的应用技术理论研究较少的问题,详细分析了盘扣分类以及直盘扣和花盘扣的制作工艺,总结了盘扣的制作技术要点及其在服装中的应用,提出盘扣在服装中的实践应用技巧。盘扣最... 详细信息

盘扣为服装服饰品之一,是一种中国结。针对盘扣分类及其在服装中的应用技术理论研究较少的问题,详细分析了盘扣分类以及直盘扣和花盘扣的制作工艺,总结了盘扣的制作技术要点及其在服装中的应用,提出盘扣在服装中的实践应用技巧。盘扣最直观的特点体现在盘扣样式上,不同特点的盘扣应用在不同造型的服装上可直接体现出服装造型风格及艺术特点。设计师借助盘扣的应用特点,可设计出精美、具有创新性的服装款式。文章归纳了盘扣在服装中的应用范围,可为盘扣在服装中的设计及应用提供理论依据。

关键词：盘扣中国结盘花扣头直盘扣花盘扣

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农民个体资本、数字技术使用与生计韧性

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西安交通大学学报（社会科学版） 2024年第3期44卷 145-155页

作者：张心仪杨建科西安交通大学人文社会科学学院陕西西安710049

在脱贫攻坚战取得胜利、全面建成小康社会后,当国家外援式帮扶政策优化调整时,如何使脱贫户实现内生性可持续发展是巩固脱贫攻坚成果并全面推进乡村振兴的重点。从生计韧性角度切入,采用陕西省518份农民调查数据,建立结构方程模型,探究... 详细信息

在脱贫攻坚战取得胜利、全面建成小康社会后,当国家外援式帮扶政策优化调整时,如何使脱贫户实现内生性可持续发展是巩固脱贫攻坚成果并全面推进乡村振兴的重点。从生计韧性角度切入,采用陕西省518份农民调查数据,建立结构方程模型,探究农民个体资本、数字技术使用及生计韧性之间的影响关系。结果表明,农民个体资本是提升其生计韧性的基础;同时,数字技术使用从缓冲能力、学习能力和自组织能力三个维度提升了生计韧性,且在农民个体资本对生计韧性的影响过程中起到部分中介效应。为此,增强农民生计韧性应遵循在个体层面提升农民个体资本、在社会支持层面加强数字技术嵌入与赋能的思路,推动实现农民内生性可持续发展。

关键词：农民个体资本生计韧性数字技术使用可持续发展内生性发展乡村振兴

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习近平总书记关于构建中国特色哲学社会科学话语体系重要论述的科学思维方法

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中共福建省委党校（福建行政学院）学报 2024年第5期 122-131页

作者：刘慧张欣怡天津师范大学新时代马克思主义研究院天津市中国特色社会主义理论体系研究中心天津师范大学基地

哲学社会科学是认识世界和改造世界的重要工具,哲学社会科学话语体系是对科学理论的凝练和表达。党的十八大以来,习近平总书记立足发展全局,结合实践创新和理论创新的现实需要,提出了加快构建中国特色哲学社会科学话语体系的重大命题,... 详细信息

哲学社会科学是认识世界和改造世界的重要工具,哲学社会科学话语体系是对科学理论的凝练和表达。党的十八大以来,习近平总书记立足发展全局,结合实践创新和理论创新的现实需要,提出了加快构建中国特色哲学社会科学话语体系的重大命题,围绕其功能、价值、原则和着力点,作出了一系列重要论述。相关论述蕴含着丰富的科学思维方法,为构建中国特色哲学社会科学话语体系提供了全方位、多层次的指导,具体表现为以历史思维审视其发展理路,以战略思维阐明其重大意义,以辩证思维明确其根本遵循,以系统思维把握其实践要求,以底线思维构筑其坚实保障,以创新思维为其注入强劲动力。

关键词：习近平哲学社会科学话语体系思维方法

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创业失败经历何以成为求职“敲门砖”?印象管理视角的理论构建

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心理科学进展 2024年第2期32卷 191-205页

作者：陈依张心怡李雅洁浙江工业大学管理学院杭州310023 上海大学管理学院上海200444

创业失败是常态,但创业者在创业失败后再次创业的少,回归职场的多。求职也是创业者从失败中恢复的重要转折,还能一定程度避免整个社会创业资源的浪费。本研究关注创业失败者求职这一现象频发但理论关注不够的问题,基于印象管理理论挖掘... 详细信息

创业失败是常态,但创业者在创业失败后再次创业的少,回归职场的多。求职也是创业者从失败中恢复的重要转折,还能一定程度避免整个社会创业资源的浪费。本研究关注创业失败者求职这一现象频发但理论关注不够的问题,基于印象管理理论挖掘创业者管理失败的社会动机,构建以“创业失败事件→印象管理策略→随后求职结果”为主线的理论模型。具体包括:(1)挖掘创业失败印象管理策略的独特内涵和结构,将其分为获得性策略和防御性策略两类;(2)探讨创业失败事件性质对印象管理策略的影响;(3)基于信号理论从创业者(信号发送者)和雇主(信号接收者)双重视角讨论印象管理策略的能力信号传递效应及对随后求职结果的影响。本研究打开了从“创业失败”向“求职成功”转换的黑箱。

关键词：创业失败创业者求职印象管理社会动机信号理论

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