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Comprehensive zoning of biomass energy heating in EU countries reference for China from European experience

Chinese Journal of Population,Resources and Environment 2021年第4期19卷 321-329页

作者： chenchen song Jijiang He Haoran Zhang Energy Transformation and Social Development Research Center Tsinghua UniversityBeijing100084China Space Information Science Research Center Tokyo UniversityTokyo277-8568Japan

Heat is the largest energy end-use in the world,accounting for about 50%of global final energy *** 2019,the International Energy Agency pointed out that the development of renewable energy heating has become a key way for the global response to climate change,environmental pollution control,energy transformation and sustainable *** energy as a priority for the development of renewable heat sources has been valued by countries around the *** earlier in the EU countries,their biomass heating technology is more mature,and their policy system is more *** for 86%of the total renewable thermal energy consumption,biothermal energy in these countries has achieved significant effect and become an important driving force for the decarbonization of the heating *** practice has a very high demonstration effect *** paper constructs a comprehensive zoning theoretical framework of biomass energy heating and utilization in the EU *** on the calculation of the supply and demand potential of biomass energy heating system,the FCM method is used to quantify the status of biomass resource utilization in 28 EU *** results show that there are significant differences in the utilization of biomass energy heating in the EU countries,which can be divided into five categories of comprehensive zones,which are the key development category(Finland,Sweden,Denmark,Estonia,Lithuania and Latvia),resource priority category(Austria,Croatia,Bulgaria,Romania,and Slovenia),policy-oriented category(Germany,Italy,Portugal,and Cyprus),good-potential category(Czech Republic,Hungary,Greece,Spain,Poland,France,and Slovakia)and under-developed category(UK,Netherlands,Belgium,Ireland,Luxembourg and Malta).At the same time,this paper discusses the characteristics and causes of biomass heating utilization of different types of EU countries,and summarizes the mature heating systems and rich experience in the EU coun

关键词： EU Biomass energy Heating Comprehensive zoning Supply and demand

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Driving forces for ultrafast laser-induced sp^(2) to sp^(3) structural transformation in graphite

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npj Computational Materials 2023年第1期9卷 1591-1597页

作者： chenchen song Mengxue Guan Yunzhe Jia Daqiang Chen Jiyu Xu Cui Zhang Sheng Meng Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences100190 BeijingChina School of Physical Sciences University of Chinese Academy of Sciences100049 BeijingChina songshan Lake Materials Laboratory 523808 DongguanGuangdongChina Present address:Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education)School of PhysicsBeijing Institute of Technology100081 BeijingChina

Understanding the microscopic mechanism of photoinduced sp^(2)-to-sp^(3) structural transformation in graphite is a scientific challenge with great ***,the ultrafast dynamics and characteristics of laser-induced structural transformation in graphite are revealed by non-adiabatic quantum dynamic *** laser irradiation,graphite undergoes an interlayer compression and sliding stage,followed by a key period of intralayer buckling and interlayer bonding to form an intermediate sp^(2)-sp^(3) hybrid structure,before completing the full transformation to hexagonal *** process is driven by the cooperation of charge carrier multiplication and selective phonon excitations through electron-phonon interactions,in which photoexcited hot electrons scattered into unoccupied high-energy conduction bands play a key role in the introduction of in-plane instability in *** work identifies a photoinduced non-adiabatic transition pathway from graphite to diamond and shows far-reaching implications for designing optically controlled structural phase transition in materials.

关键词： structural phonon interlayer

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Fermionic Analogue of High Temperature Hawking Radiation in Black Phosphorus

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Chinese Physics Letters 2020年第6期37卷 80-85页

作者： Hang Liu Jia-Tao Sun chenchen song Huaqing Huang Feng Liu Sheng Meng Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China Department of Materials Science and Engineering University of UtahSalt Lake CityUtah 84112USA Collaborative Innovation Center of Quantum Matter Beijing 100084China University of Chinese Academy of Sciences Beijing 100049China

Time-periodic laser driving can create nonequilibrium states not accessible in equilibrium,opening new regimes in materials engineering and topological phase *** report that black phosphorus(BP)exhibits spatially nonuniform topological Floquet-Dirac states under laser illumination,mimicking the"gravity"felt by fermionic quasiparticles in the same way as that for a Schwarzschild black hole(SBH).Quantum tunneling of electrons from a type-ⅡDirac cone(inside BH)to a type-ⅠDirac cone(outside BH)emits an SBH-like Planck radiation *** Hawking temperature T_H obtained for a fermionic analog of BH in the bilayer BP is approximately 3K,which is several orders of magnitude higher than that in previous *** work sheds light on increasing T_H from the perspective of engineering 2D materials by time-periodic light *** predicted SBH-like Hawking radiation,accessible in BP thin films,provides clues to probe analogous astrophysical phenomena in solids.

关键词： spectrum. illumination topological

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Characteristics of gut microbiota in representative mice strains:Implications for biological research

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Animal Models and Experimental Medicine 2022年第4期5卷 337-349,I0002页

作者： Jianguo Guo chenchen song Yunbo Liu Xuying Wu Wei Dong Hua Zhu Zhiguang Xiang Chuan Qin Key Laboratory of Human Disease Comparative Medicine Chinese Ministry of HealthBeijing Key Laboratory for Animal Models of Emerging and Remerging Infectious DiseasesInstitute of Laboratory Animal ScienceChinese Academy of Medical Sciences and Comparative Medicine CenterPeking Union Medical CollegeBeijingChina

Background:Experimental animals are used to study physiological phenomena,pathological mechanisms,and disease *** gut microbiome is known as a potential confounding factor for inconsistent data from preclinical *** many gut microbiome studies have been conducted in recent decades,few have focused on gut microbiota fluctuation among representative mouse ***:A range of frequently used mouse strains were selected from 34 isolation packages representing disease-related animal(DRA),immunity defect animal(IDA),or gene-editing animal(GEA)from the BALB/c and C57BL/6J backgrounds together with normal mice,and their microbial genomic DNA were isolated from mouse feces to sequence for the exploration of gut ***:Mouse background strain,classification,introduced source,introduced year,and reproduction type significantly affected the gut microbiota structure(p<0.001 for all parameters),with background strain contributing the greatest influence(R^(2)=0.237).In normal groups,distinct gut microbiota types existed in different mouse ***-four core operational taxonomic units were obtained from normal mice,and 12 belonged to ***,the gut microbiota in C57BL/6J was more stable than that in BALB/c ***,the gut microbiota in the IDA,GEA,and DRA groups significantly differed from that in normal groups(p<0.001 for all).Compared with the normal group,there was a significantly higher Chao 1 and Shannon index(p<0.001 for all)in the IDA,GEA,and DRA *** changed classes occurred with Firmicutes and *** abundances of Helicobacter,Blautia,Enterobacter,Bacillus,Clostridioides,Paenibacillus,and Clostridiales all significantly decreased in the IDA,GEA,and DRA groups,whereas those of Saccharimonas,Rikenella,and Odoribacter all significantly increased.

关键词： Bacteroidetes BALB/c mice C57BL/6J disease-related animal Firmicutes gene-editing animal gut microbiota i mmunity defect animal strains

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ERβ modulation and non-modulation of ERα by administration of geniposide and panax notoginseng saponins in SH-SY5Y cells

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Journal of Traditional Chinese Medical Sciences 2019年第2期6卷 147-154页

作者： Ya'nan Zhao Liangqin Wan Yan Tan Zijian Zhang Fang He chenchen song Xu Wang Weihong Li Tonghua Liu Qian Hua School of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China Department of Biomedical Sciences Paul L.Foster School of MedicineTexas Tech University Health Sciences CenterEl Paso 79905TexasUSA

Objective:To illustrate the effect of geniposide (GP) and panax notoginseng saponins (PNS) on estrogen receptors (ER) including ERα and ERβ within the cytoplasm and nucleus of SH-SY5Y ***:Immunofluorescence was used to observe the distribution of ERα and ERβ in cytoplasm and nucleus,but Western blot was only for ERβ detection.q-PCR was applied to detect NR3C1,S100A6 and LGALS1downstream mRNA gene expression levels of ***:Through analyzing fluorescence intensity under the administration of GP and PNS in SHSY5Y cells,we found that the distribution of ERα has not been *** also discovered that GP and/or PNS significantly stimulated the transportation of ERβ into the nucleus in a timedependent manner (all P <.001).When SH-SY5Y cells were treated with supplements of GP,PNS,GP + PNS at 15 minutes,30 minutes and 45 minutes,the distribution of ERβ in the nucleus significantly increased compared with that in control group (all P <.001).Evidently,treatment with GP,PNS,GP + PNS was able to significantly increase the levels of ERβ protein within the nucleus compared with control group at both 30 minutes and 45 minutes intervals (all P <.001).Furthermore,GP and PNS showed signs of activating to NR3C1 and LGALS1,two genes downstream of *** is possible that the 5100A6 gene mainly encoded the downstream gene in ERα's signaling pathway,which was not affected after the treatment of GP and/or ***:The distribution and expression of ERβ has been modulated under the administration of GP + PNS within the SH-SY5Y cells,whereas ERα has *** and PNS in combination may play an estrogenic-like effect with selectivity on ERβ modulation.

关键词： Geniposide Panax notoginseng saponins Estrogen receptor SH-SY5Y cell

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一种非线性强度准则及转换应力法

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力学学报 2019年第4期51卷 1210-1222页

作者：万征宋琛琛孟达中国建筑科学研究院地基基础研究所北京100013 北京市地基基础与地下空间开发利用工程技术研究中心北京100013 同济大学土木工程学院上海200092

岩土材料在二维破坏模式下具有较强烈的曲线形态,在一般剪应力与正应力空间中提出用幂参数曲线来表达上述曲线,该曲线与摩尔圆的外切点即对应为破坏应力点,则利用该点的外切直线斜率的反正切值来得到有效滑移角.对于三维单元体,共存在... 详细信息

岩土材料在二维破坏模式下具有较强烈的曲线形态,在一般剪应力与正应力空间中提出用幂参数曲线来表达上述曲线,该曲线与摩尔圆的外切点即对应为破坏应力点,则利用该点的外切直线斜率的反正切值来得到有效滑移角.对于三维单元体,共存在三个有效滑移角,利用三个有效滑移角确定出空间有效滑移面.基于岩土材料为摩擦型材料这一基本特性,利用空间有效滑移面上的应力比为一定值作为衡量材料破坏与否的判断准则,基于上述思路推导得到了t强度准则,在偏平面上,t准则开口形状为介于Von-Mises圆形曲线到SMP曲边三角形形态.在子午面上,引入开口的幂函数作为反映静水压力效应以及剪切破坏的曲线,而闭口的水滴型屈服面函数作为反映体积压缩屈服曲线,反映了岩土材料的压剪耦合特性.基于所提出的t强度准则,推导了变换应力公式,可将以p,q为应力量的二维模型简单方便的转换为三维应力状态本构模型.通过强度以及多种应力路径的测试对比,验证了所提t准则及基于该准则的变换应力公式的合理性.

关键词：岩土材料破坏强度准则屈服准则应力路径

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基于统一硬化参量的原状饱和黏土的结构性本构模型

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岩石力学与工程学报 2019年第9期38卷 1905-1918页

作者：万征秋仁东宋琛琛桂林理工大学广西岩土力学与工程重点实验室广西桂林541004 中国建筑科学研究院地基基础研究所北京100013 北京市地基基础与地下空间开发利用工程技术研究中心北京100013 同济大学结构防灾减灾工程系上海200092

根据饱和结构性黏土特有的剪胀特点,基于统一硬化参数,对原有的超固结土UH模型进行修正,使之适用于反映结构性土的应力-应变关系,主要结论如下:(1)通过将屈服面在p-q坐标系中向左平移,得到能用来反映具有一定拉伸强度特性的屈服面,且由... 详细信息

根据饱和结构性黏土特有的剪胀特点,基于统一硬化参数,对原有的超固结土UH模型进行修正,使之适用于反映结构性土的应力-应变关系,主要结论如下:(1)通过将屈服面在p-q坐标系中向左平移,得到能用来反映具有一定拉伸强度特性的屈服面,且由于屈服面左端位于原点左侧,为了能够描述随体应变发展而造成的胶结强度的损失规律,建议一个屈服面左侧移动的演化方程;(2)通过引入状态参量c来描述体变剪缩到剪胀转换时所对应的变相应力比强度特性,使得体变大小以及体变转换规律符合不同胶结程度而变化的特点;(3)对于结构性土在剪缩下的大体积剪缩特点,提出结构性应力比参量R*,并给出基于R*的结构性潜在强度的关系式。使用上述潜在强度来修正统一硬化参数,并最终得到了能反映结构性土应力-应变关系的简单模型,可以用来反映结构性土的高应力比强度特性,胶结特性随体变逐渐损失特点,大体积剪缩,伴随着胶结损失而产生的应变软化,剪缩、剪胀等主要变形特性。

关键词：土力学结构性黏土剪胀应力–应变关系强度状态参量

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一种适用于岩土的扩展强度及屈服准则

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力学学报 2019年第5期51卷 1545-1556页

作者：万征孟达宋琛琛中国建筑科学研究院地基基础研究所北京100013 同济大学土木工程学院上海200092

土壤材料是一种典型的摩擦型材料,然而天然岩石却具有一定的凝聚力,而金属材料则完全是凝聚型材料.在分析三种典型的材料强度准则表达式基础上,即SMP,Lade-Duncan以及广义Von-Mises准则,通过利用应力张量的不变量表达形式,提出了一种扩... 详细信息

土壤材料是一种典型的摩擦型材料,然而天然岩石却具有一定的凝聚力,而金属材料则完全是凝聚型材料.在分析三种典型的材料强度准则表达式基础上,即SMP,Lade-Duncan以及广义Von-Mises准则,通过利用应力张量的不变量表达形式,提出了一种扩展准则即VML准则,该准则能够分别退化为上述3种典型准则.在偏平面上,新准则能够描述从曲边三角形到圆形在内的多种开口形态;在子午面上,采用幂函数作为破坏准则公式,能够描述静水压力对于强度特性影响的非线性性质.而对于土壤的屈服性质,岩土材料具有典型的压剪耦合特性,因此,为了描述剪切与等方向压缩两种路径下的体积耦合现象,采用水滴型屈服面作为屈服准则.对于偏平面上的截面形状,讨论了给定球应力下偏应力强度值的分布形式及特点,讨论了应力罗德角对于偏平面上强度曲线的凹凸性的影响.最后,通过多种材料的破坏与屈服试验成果,用所提新准则进行了验证.通过强度以及屈服特性测试对比,验证了所提VML准则的合理性.

关键词：土壤岩石强度准则屈服准则破坏

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一种横观各向同性强度准则及变换应力空间

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力学学报 2018年第5期50卷 1168-1184页

作者：万征宋琛琛赵晓光中国建筑科学研究院地基基础研究所北京100013 同济大学结构工程与防灾研究所上海200092

考虑岩土介质在自然形成过程中产生的原生各向异性性质,将其简化为一种横观各向同性岩土材料.基于已提出的a强度准则,根据沉积面与有效滑移面在物理空间中位置的相互关系,采用两面的空间夹角作为度量岩土材料原生各向异性在加载条件下... 详细信息

考虑岩土介质在自然形成过程中产生的原生各向异性性质,将其简化为一种横观各向同性岩土材料.基于已提出的a强度准则,根据沉积面与有效滑移面在物理空间中位置的相互关系,采用两面的空间夹角作为度量岩土材料原生各向异性在加载条件下发挥强度作用的影响变量.并根据有效滑移面的物理概念,当沉积面与有效滑移面夹角越大,则摩擦特性潜力发挥的越充分,此时对应更高的强度应力比,反之则对应越小的强度应力比.基于上述思想,建立了考虑原生各向异性的强度应力比公式,将其用于修正a准则,进而得到了横观各向同性a准则公式.采用上述横观各向同性a准则公式向各向同性Von-Mises准则公式转换的变换思路,在横观各向同性a准则公式基础上,推导得到了变换应力公式,该公式可由横观各向同性应力空间转变为各向同性应力空间,利用所提出的变换应力方法,可方便的将传统的在偏平面上以Von-Mises准则为基础的二维模型转换为可考虑原生各向异性的三维模型.通过对岩土材料的强度以及真三轴条件下的应力应变关系试验数据预测,验证了所提的横观各向同性a准则及其变换应力公式的有效性及适用性.

关键词：各向异性强度滑动面沉积面本构模型

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能源消费与科技创新对皮革业发展的作用机制研究

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皮革科学与工程 2023年第3期33卷 99-103页

作者：宋晨晨赵龙扬州大学广陵学院江苏扬州225000

皮革业发展与市场环境、环保规制、能源消费和科技投入等因素密切相关。以2001~2020年全国29个省份为例,构建以皮革业科技创新为调节变量的实证研究模型,探究能源消费、科技创新、皮革业发展三者间的作用机制。研究结果表明,能源消费与... 详细信息

皮革业发展与市场环境、环保规制、能源消费和科技投入等因素密切相关。以2001~2020年全国29个省份为例,构建以皮革业科技创新为调节变量的实证研究模型,探究能源消费、科技创新、皮革业发展三者间的作用机制。研究结果表明,能源消费与科技创新对皮革业名义发展和实际发展均有正向影响,科技创新同时发挥显著调节效应,这一结论在进行稳健性检验后依然成立。进一步分析发现,科技创新调节效应在东部地区表现更为显著。为此,在环境规制背景下,高能耗粗放型生产方式面临制约,要充分认识科技创新对促进皮革业发展的重要作用,引导皮革行业发展的良性循环。

关键词：皮革业能源消费科技投入调节效应

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