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A refined deviatoric hardening plastic model for sand

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2813-2821页

作者： Min Wang Tongming Qu Yuntian Feng teng liang liangtong Zhan MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering Zhejiang UniversityHangzhou310058China Department of Civil and Environmental Engineering Hong Kong University of Science and TechnologyKowloon999077Hong KongChina Zienkiewicz Centre for Computational Engineering College of EngineeringSwansea UniversitySwanseaWalesSA18EPUK Center for Hypergravity Experimental and Interdisciplinary Research Zhejiang UniversityHangzhou310058China

The classical deviatoric hardening models are capable of characterizing the mechanical response of granular materials for a broad range of degrees of *** work finds that it has limitations in accurately predicting the volumetric deformation characteristics under a wide range of confining/consolidation *** issue stems from the pressure independent hardening law in the classical deviatoric hardening *** overcome this problem,we propose a refined deviatoric hardening model in which a pressure-dependent hardening law is developed based on experimental *** between numerical results and laboratory triaxial tests indicate that the improved model succeeds in capturing the volumetric deformation behavior under various confining/consolidation pressure conditions for both dense and loose ***,to examine the importance of the improved deviatoric hardening model,it is combined with the bounding surface plasticity theory to investigate the mechanical response of loose sand under complex cyclic loadings and different initial consolidation *** is proved that the proposed pressure-dependent deviatoric hardening law is capable of predicting the volumetric deformation characteristics to a satisfactory degree and plays an important role in the simulation of complex deformations for granular geomaterials.

关键词： Elasto-plastic deformation Isotropic hardening Deviatoric plastic strain Granular material Kinematic hardening Bounding surface

Repeated Range Expansion and Glacial Endurance of Potentilla glabra(Rosaceae) in the Qinghai-Tibetan Plateau

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Journal of Integrative Plant Biology 2009年第7期51卷 698-706页

作者： Liu-Yang Wang Hiroshi Ikeda teng-liang Liu Yu-Jin Wang Jian-Quan Liu Key Laboratory of Adaptation end Evolution of Plateau Biota Northwest Institute of Plateau Biology the Chinese Academy of SciencesXining 810001 China Institute of Molecular Ecology MOE Key Laboratory of Arid and Grassland Ecology School of Life Science Lanzhou UniversityLanzhou 730000 China Department of Botany the University Museum the University of Tokyo Tokyo 113-0033 Japan Graduate University of the Chinese Academy of Sciences Beijing 100049 China

To date, little is still known about how alpine species occurring in the Qinghai-Tibetan Plateau （QTP） responded to past climatic oscillations. Here, by using variations of the chloroplast trnT-L, we examined the genetic distribution pattern of 101 individuals of Potentilla glabra, comprising both the interior QTP and the plateau edge. Phylogenetic and network analyses of 31 recovered haplotypes identified three tentative clades （A, B and C）. Analysis of molecular variance （AMOVA） revealed that most of the genetic variability was found within populations （0.693）, while differentiations between populations were obviously distinct （Fst -- 0.307）. Two independent range expansions within clades A and B occurring at approximately 316 and 201 thousand years ago （kya） were recovered from the hierarchical mismatch analysis, and these two expansions were also confirmed by Fu＇s Fs values and ＇g＇ tests. However, distant distributions of clade C and private haplotypes from clades A and B suggest that they had survived the Last Glacial Maximum （LGM） and previous glaciers in situ since their origins. Our findings based on available limited samples support that multiple refugia of a few cold-enduring species had been maintained in the QTP platform during LGM and/or previous glacial stages.

关键词： glacial refugia phylogeography Potentilla glabra Qinghai-Tibetan Plateau range expansion tmT-L.

Granular porous calcium carbonate particles for scalable and high-performance solar-driven thermochemical heat storage

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Science China(Technological Sciences) 2021年第10期64卷 2142-2152页

作者： SONG Chao LIU XiangLei XUAN YiMin ZHENG HangBin GAO Ke teng liang DA Yun LI Chuan LI Yongliang DING YuLong School of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Key Laboratory of Thermal Management and Energy Utilization of Aviation Vehicles Ministry of Industry and Information TechnologyNanjing 210016China College of Environmental and Energy Engineering Beijing University of TechnologyBeijing 100124China Birmingham Centre for Energy Storage School of Chemical EngineeringUniversity of BirminghamBirmingham B152TTUK

Calcium carbonate is promising thermochemical heat storage material for next-generation solar power systems due to its high energy storage density,low cost,and high operation *** have tried to improve energy storage performances of calcium carbonate recently,but most researches focus on powders,which are not suitable for scalable ***,novel granular porous calcium carbonate particles with very high solar absorptance,energy storage density,abrasive resistances,and energy storage rate are proposed for direct solar thermochemical heat *** average solar absorptance is improved by 234%compared with ordinary *** cycle stability and abrasive resistances are excellent with almost no decay of energy storage density over 25 cycles nor apparent particle weight loss over 24 h of continuous operation insides a planetary ball *** addition,the decomposition temperature is reduced by 2.8%–5.6%while the reaction rate of heat storage is enhanced by 80%–205%depending on the CO_(2) partial *** decomposition process of doped granular porous CaCO_(3) particles is found to involve three overlapping *** work provides new routes to achieve scalable direct solar thermochemical heat storage for next-generation high-temperature solar power systems.

关键词： thermochemical energy storage calcium carbonate solar absorptance cycle stability abrasive resistances kinetics analysis

Immunohistochemical analysis of PD-L1 and tumor-infiltrating immune cells expression in the tumor microenvironment of primary signet ring cell carcinoma of the prostate

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Asian Journal of Andrology 2022年第5期24卷 525-532页

作者： Qi-liang teng Xin-Rui Yang Shuang Wen Zhi-Hong Dai Hong-Long Wang Tian-Qing Liu liang Wang Bo Fan Zhi-Yu Liu Department of Urology Second Affiliated Hospital of Dalian Medical UniversityDalian 116023China Department of Clinical Imaging Second Affiliated Hospital of Dalian Medical UniversityDalian 116023China Department of Pathology Dalian Friendship HospitalDalian 116001China

Primary signet ring cell carcinoma(SRCC)of the prostate is a rare ***,its potential tumorigenic mechanism,clinicopathological features,and prognostic outcome have not been systematically *** determine the pathogenic mechanism,we detected distributions of programmed cell death-ligand 1(PD-L1),programmed death 1(PD-1),and cellular components in the tumor microenvironment,including tumor-infiltrating lymphocytes(CD4 and CD8),tumor-associated macrophages(TAMs;CD163 and CD68),and tumor-associated fibroblasts(vimentin and alpha-smooth muscle actin[α-SMA]),in tumor tissues from four patients with primary prostatic SRCC compared with corresponding adjacent tissues and tumor tissues from 30 patients with prostate adenocarcinoma(PCa)by immunohistochemical *** found higher expression of PD-L1,CD163,and CD68 in primary SRCC specimens than that in both corresponding adjacent nontumor specimens and PCa specimens with different Gleason scores,indicating that TAMs may participate in the malignant biological behavior of primary SRCC of the *** further analysis,we searched electronic journal databases and Surveillance,Epidemiology,and End Results(SEER)to identify 200 eligible patients including our four *** to Kaplan–Meier survival curve analysis,patients<68 years old,with radical prostatectomy(RP),Gleason score of 7–8,and lower clinical stage had longer overall survival(OS).Moreover,Cox multivariate analysis indicated that race(hazard ratio[HR]=1.422),surgical approach(HR=1.654),and Gleason score(HR=2.162)were independent prognostic factors for ***,primary SRCC of the prostate represents a distinct and aggressive subtype of prostate cancer associated with a higher distribution of PD-L1 and TAMs,which warrants further clinical investigation.

关键词： clinical features immunohistochemistry infiltrating immune cells primary signet ring cell carcinoma of the prostate tumor microenvironment

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格栅结构对多孔介质集热器性能影响研究

工程热物理学报 2019年第6期40卷 1344-1349页

作者：滕亮宣益民南京航空航天大学能源与动力学院

太阳能光热发电技术近年来发展十分迅速,集热器作为关键部件之一也吸引了很多研究者的关注。其中以多孔介质作为吸热体,空气作为传热工质的容积式集热器是最具有前景的集热器方案之一,这种集热器目前面临着辐射损失大的问题。本文提出... 详细信息

太阳能光热发电技术近年来发展十分迅速,集热器作为关键部件之一也吸引了很多研究者的关注。其中以多孔介质作为吸热体,空气作为传热工质的容积式集热器是最具有前景的集热器方案之一,这种集热器目前面临着辐射损失大的问题。本文提出在多孔介质外增设一层格栅结构,并研究了格栅结构对强化多孔介质吸收太阳辐射和减少热辐射损失的作用。光线追迹模拟结果发现,格栅厚度增加会强化集热器对太阳辐射的吸收并能大幅减少辐射损失。

关键词：格栅结构多孔介质选择性反射光线追迹

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马新林写意重彩山水的时代探索

美术 2022年第7期655卷 60-65页

作者：梁腾澳门城市大学艺术教育研究中心中国澳门

以笔墨语言传达对民族文化精神的阐释与反思,诗书画印一体的艺术形式在新时代条件下重新焕发新的光彩。像马新林先生这样,一手以书入画,一手深入生活的创作方式,在新时代中国画土发展中有着不同寻常的意义。“有至大,至刚,至中,至正之气... 详细信息

以笔墨语言传达对民族文化精神的阐释与反思,诗书画印一体的艺术形式在新时代条件下重新焕发新的光彩。像马新林先生这样,一手以书入画,一手深入生活的创作方式,在新时代中国画土发展中有着不同寻常的意义。“有至大,至刚,至中,至正之气,蕴蓄于胸中,为学必尽其极,为事必得其全,旁及艺事,不求工而自能登峰造极。”

关键词：以书入画笔墨语言诗书画印重彩民族文化精神中国画深入生活为事

论党史学习教育的视觉表达——以《美术经典中的党史》为例

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电视研究 2022年第2期 47-49页

作者：梁腾中国人民大学马克思主义学院

《美术经典中的党史》通过美术作品再现中国共产党百年辉煌历程。本文认为,节目以美术作品为载体,创新党史故事的叙述方式,形象化呈现重要历史时刻的图景,从而形成具有感染力的视觉表达方式,一方面向观众呈现红色经典美术作品,给予其审... 详细信息

《美术经典中的党史》通过美术作品再现中国共产党百年辉煌历程。本文认为,节目以美术作品为载体,创新党史故事的叙述方式,形象化呈现重要历史时刻的图景,从而形成具有感染力的视觉表达方式,一方面向观众呈现红色经典美术作品,给予其审美愉悦,提高其艺术鉴赏能力;另一方面解析作品背后的党史故事,引发观众深入思考并巩固历史记忆,实现了艺术性与思想性的高度融合。

关键词：党史学习教育《美术经典中的党史》视觉表达

20世纪80年代“振兴中华”读书活动的兴起及其影响

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当代中国史研究 2023年第2期30卷 41-55,157页

作者：梁腾中国人民大学马克思主义学院 100872

20世纪80年代,上海率先开展职工读书活动,后经过征名确定为“振兴中华”读书活动。在中央的肯定与号召下,各地区各单位积极举办“振兴中华”读书活动,知识竞赛、演讲比赛、征文等相关活动一时间风靡开来,适应了广大职工对读书学习的迫... 详细信息

20世纪80年代,上海率先开展职工读书活动,后经过征名确定为“振兴中华”读书活动。在中央的肯定与号召下,各地区各单位积极举办“振兴中华”读书活动,知识竞赛、演讲比赛、征文等相关活动一时间风靡开来,适应了广大职工对读书学习的迫切需求。“振兴中华”读书活动在促进社会主义精神文明建设、创新职工思想政治工作方式、提高职工队伍的思想道德素质与科学文化水平等方面具有重要意义。

关键词：改革开放振兴中华职工读书活动

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视觉与抗战:《良友》画报中革命宣传的建构

党史研究与教学 2020年第4期 49-55页

作者：梁腾华东师范大学马克思主义学院上海200241

九一八事变以后,日本侵略中国的野心昭然若揭。在这段时期,《良友》画报在其醒目位置着以大量笔墨描绘日本侵略中国及中国人民奋起抗争的图景,在这种图像叙事中又塑造着革命宣传。《良友》画报是抗战时期革命宣传的重要力量,通过爬梳画... 详细信息

九一八事变以后,日本侵略中国的野心昭然若揭。在这段时期,《良友》画报在其醒目位置着以大量笔墨描绘日本侵略中国及中国人民奋起抗争的图景,在这种图像叙事中又塑造着革命宣传。《良友》画报是抗战时期革命宣传的重要力量,通过爬梳画报对革命宣传的建构,发现画报在图像传播过程中渐次创设革命场域、唤醒受众革命认同、动员全民族抗战。在图像传播与接受过程中创设革命场域以渲染革命氛围;在革命场域的基础上借助图像传播以唤醒读者的革命认同;在革命认同的前提下进一步释放图像中的革命信息以生成革命动员。总之,通过这种深层次的作用机理塑造出画报独特的革命宣传。

关键词：抗战时期《良友》画报视觉图像革命宣传