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Challenges and opportunities for carbon neutrality in China’s building sector—Modelling and data

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Building Simulation 2022年第11期15卷 1899-1921页

作者： shan Hu Yang Zhang Ziyi Yang Da Yan Yi jiang Building Energy Research Center School of ArchitectureTsinghua UniversityBeijing 100084China

The building sector is one of the largest energy user and carbon emitter *** achieve China’s national carbon target,the building sector in China needs to achieve carbon peaking and neutrality targets by 2030 and 2060,***,data deficiency on building energy and emissions become barriers for tracking the status of building energy and emissions,and identify potential opportunities for achieving dual carbon *** address these shortcomings,this study established an integrated China Building Energy and Emission Model(CBEEM).With CBEEM,this study evaluated the building-construction and building-operation energy and emissions in China,and revealed the status quo and potential challenge and *** to modelling results,building operation energy use of China was 1.06 billion tce in 2020,accounting for 21%of China’s total primary energy *** construction energy consumption was 0.52 billion tce in 2020,accounting for another 10%of total primary energy *** messages found on building carbon emissions are:building construction embodied emissions were 1.5 billion tCO_(2) in 2020 and are declining slowly,building operational carbon emissions were 2.2 billion tCO_(2) in 2020 and are still *** comparisons between China and other countries on building stock,energy use intensity and carbon emission intensity were conducted as well,and help shed a light on the challenges for decarbonization of China’s building ***,technology perspectives to achieve carbon neutrality target were discussed and related policy suggestions were provided.

关键词： climate change building sector carbon neutrality global comparison China building energy and emission

A vector hybrid triboelectric sensor(HTS)for motion identification via machine learning

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Nano Research 2023年第7期16卷 10120-10130页

作者： Nannan Zhou Hongrui Ao xiaoming Chen shan Gao Hongyuan jiang School of Mechatronics Engineering Harbin Institute of TechnologyHarbin 150001China School of Control Engineering Northeastern University at QinhuangdaoQinhuangdao 066004China

Rapidly responding and cost-effective sensors played a crucial role in industrial ***,the lack of versatile strategies for identifying and classifying operating states on various practical behaviors has limited the rapid development of monitoring *** study developed a vector hybrid triboelectric sensor(HTS)with surface nanocrystalline containing triboelectric vibration and rotation units(triboelectric vibration unit(TVU),triboelectric rotation unit(TRU))capable of detecting the vibrational and rotary states of the *** synchronous detection of two sensing signals can be achieved due to the hierarchical structure as the basic unit of the HTS,which contributed to reducing the volume and spatial distribution of the *** on the voltage/current/charge(U-I-Q)signal amplitudes and phase features generated by the TVU,the vibration frequency and orientation of the device can be identified by using a double-layer neural network(D-LNN),in which the accuracy reaches 96.5%and 95.5%***,by combining logistic regression,D-LNN,and linear regression,the accuracy of the TRU for rotary classification exceeds 93.5%in practical *** this study,the great potential application of the HTS combined with the machine learning methods was successfully explored and exhibited and it might speed up the development of industrial detection in the near future.

关键词： vector triboelectric sensor surface nanocrystalline hierarchical structure sensing properties state detection machine learning

Methodological study on endogenous calcium absorptivity using rats and 41Ca tracing

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Nuclear Science and Techniques 2018年第4期29卷 79-82页

作者： Hui Zhang Liang Dou xiao-Ming Wang Sheng-Quan Mi Qing-Zhang Zhao shan jiang Ming He China Institute of Atomic Energy Beijing 102413 China Technical Physics Institute of Heilongjiang Academy of Sciences Harbin 150086 China Department of Biology College of Applied Arts and Sciences Beijing Union University Beijing 100083 China

Elemental calcium plays an important role in human physiology. In order to study the relationship between Ca-intake, Ca-chemical formulation, and Ca-absorptivity, a balance experiment using a ^(41)Ca tracer technique in SD rats was conducted to measure the endogenous fecal calcium and true absorption of calcium. Apparent absorption of calcium was measured as a control to the endogenous calcium labeling experiment. These results show that by using ^(41)Ca labeled endogenous calcium in vivo, researchers could obtain the true calcium absorption data without extrinsic labeling. Therefore, the method was not affected by the chemical structure or type of calcium supplement and might be used in evaluating the absorptivity of marketed calcium supplements.

关键词： Endogenous calcium absorptivity 41Ca tracer Accelerator mass spectrometry measurement

A One-pot Procedure to Prepare Ethynylferrocene and Iodoethynylferrocene

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Chinese Chemical Letters 2001年第5期12卷 387-390页

作者： Ji shan WU Chun Yan CHI Xian Hong WANG xiao jiang ZHAO Ji LI Fo Song WANG State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022

Ethynylferrocene and iodoethynylferrocene were prepared in high yield as 88-90% through a one-pot procedure. 1, 1'-diiodoferrocenylene was in-situ prepared from reaction of CHI3 PPh3, t-BuOK and ferrocenecarboxaldehyd... 详细信息

关键词： Ferrocene derivatives Wittig-type reaction.

Initiatives to clarify mechanisms of hydrological evolution in human-influenced Yellow River Basin

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Water Science and Engineering 2023年第2期16卷 117-121页

作者： Li-liang Ren shan-shui Yuan xiao-li Yang shan-hu jiang Gui-bao Li Qiu-an Zhu Xiu-qin Fang Yi Liu Yi-qi Yan State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210098China College of Hydrology and Water Resources Hohai UniversityNanjing 210098China Yangtze Institute for Conservation and Development Hohai UniversityNanjing 210098China Chinese Hydraulic Engineering Society Beijing 100053China Hydrology Bureau Yellow River Conservancy CommissionMinistry of Water ResourcesZhengzhou 450003China

Significant changes in water cycle elements/processes have created serious challenges to regional sustainability and high-quality development in the Yellow River Basin in *** is necessary to investigate the impacts of climate change and human activities on hydrological evolution and disaster risk from a holistic perspective of the *** study developed initiatives to clarify the mechanisms of hydrological evolution in the human-influenced Yellow River *** proposed research method includes:(1)a tool to simulate multiple factors and a multi-scale water cycle using a grid-based spatiotemporal coupling approach,and(2)a new algorithm to separate the responses of the water cycle to climate change and human impacts,and de-couple the eco-environmental effects using artificial intelligence *** this research framework,key breakthroughs are expected to be made in the understanding of the impacts of land cover change on the water cycle and blue/green water *** outcomes of this research project are expected to provide theoretical support for ecological protection and water governance in the basin.

关键词： Climate change Human activities Hydrological evolution Runoff change Yellow River Basin

Balanced Truncation Based on Generalized Multiscale Finite Element Method for the Parameter-Dependent Elliptic Problem

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Advances in Applied Mathematics and Mechanics 2018年第6期10卷 1527-1548页

作者： shan jiang Anastasiya Protasov Meiling Sun School of Science Nantong UniversityNantong 226019China Department of Mathematics Institute for Scientific ComputationTexas A&M UniversityCollege StationTX 77843USA Department of Computational and Applied Mathematics Rice UniversityHoustonTX 77005USA Department of Public Courses Nantong Vocational UniversityNantong 226007China

In this paper,we combine the generalized multiscale finite element method(GMsFEM)with the balanced truncation(BT)method to address a parameterdependent elliptic ***,in progress of a model reduction we try to obtain accurate solutions with less computational *** is realized via a spectral decomposition from the dominant eigenvalues,that is used for an enrichment of multiscale basis functions in the *** multiscale bases computations are localized to specified coarse neighborhoods,and follow an offline-online process in which eigenvalue problems are used to capture the underlying system *** the BT on reduced scales,we present a local-global strategy where it requires the observability and controllability of solutions to a set of Lyapunov *** the Lyapunov equations need expensive computations,the efficiency of our combined approach is shown to be readily flexible with respect to the online space and an reduced *** experiments are provided to validate the robustness of our approach for the parameter-dependent elliptic model.

关键词： Generalized multiscale method balanced truncation parameter dependent eigenvalue decomposition Lyapunov equation

Roles of Eph/ephrin bidirectional signaling during injury and recovery of the central nervous system

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Neural Regeneration Research 2018年第8期13卷 1313-1321页

作者： Yue Wan Jin-shan Yang Li-Cai Xu xiao-jiang Huang Wei Wang Min-Jie Xie Department of Neurology The Third People's Hospital of Hubei Province Wuhan Hubei Province China Department of Neurology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei ProvinceChina Department of Neurology First Affiliated Hospital Fujian Medical University Fuzhou Fujian Province China Department of Neurological Rehabilitation Center The Third People's Hospital of Hubei Province Wuhan Hubei Province China

Multiple cellular components, including neuronal, glial and endothelial ceils, are involved in the sophis- ticated pathological processes following central nervous system injury. The pathological process cannot reduce damage or improve functional recovery by merely targeting the molecular mechanisms of neuronal cell death after central nerve system injuries. Eph receptors and ephrin ligands have drawn wide attention since the discovery of their extensive distribution and unique bidirectional signaling between astrocytes and neurons. The roles of Eph/ephrin bidirectional signaling in the developmental processes have been re- ported in previous research. Recent observations suggest that Eph/ephrin bidirectional signaling continues to be expressed in most regions and cell types in the adult central nervous system, playing diverse roles. The Eph/ephrin complex mediates neurogenesis and angiogenesis, promotes glial scar formation, regulates endocrine levels, inhibits myelin formation and aggravates inflammation and nerve pain caused by injury. ~lhe interaction between Eph and ephrin is also considered to be the key to angiogenesis. This review focus- es on the roles of Eph/ephrin bidirectional signaling in the repair of central nervous system injuries.

关键词： nerve regeneration Eph/ephrin bidirectional signaling central nervous system injury recovery neurons glial cells

Changes of Effective Connectivity in the Alpha Band Characterize Differential Processing of Audiovisual Information in Cross-Modal Selective Attention

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Neuroscience Bulletin 2020年第9期36卷 1009-1022页

作者： Weikun Niu Yuying jiang Xin Zhang Tianzi jiang Yujin Zhang shan Yu Brainnetome Center Institute of AutomationChinese Academy of SciencesBeijing 100190China National Laboratory of Pattern Recognition Institute of AutomationChinese Academy of SciencesBeijing 100190China Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Cross-modal selective attention enhances the processing of sensory inputs that are most relevant to the task at *** differential processing could be mediated by a swift network reconfiguration on the macroscopic level,but this remains a poorly understood *** tackle this issue,we used a behavioral paradigm to introduce a shift of selective attention between the visual and auditory domains,and recorded scalp electroencephalographic signals from eight healthy *** changes in effective connectivity caused by the cross-modal attentional shift were delineated by analyzing spectral Granger Causality(GC),a metric of frequency-specific effective *** data-driven methods of pattern-classification and feature-analysis,we found that a change in the a band(12 Hz-15 Hz) of GC is a stable feature across different individuals that can be used to decode the attentional ***,auditory attention induces more pronounced information flow in the α band,especially from the parietal-occipital areas to the temporal-parietal areas,compared to the case of visual attention,reflecting a reconfiguration of interaction in the macroscopic brain network accompanying different *** results support the role of α oscillation in organizing the information flow across spatially-separated brain areas and,thereby,mediating cross-modal selective attention.

关键词： Human EEG Audiovisual selective attention Granger Causality Pattern classification

MOF-derived Cu2O/Cu NPs on N-doped Porous Carbon as a Multifunctional Sensor for Mercury(Ⅱ) and Glucose with Wide Detection Range

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Chinese Journal of Structural Chemistry 2020年第8期39卷 1522-1530,1361页

作者： XU Wei-Qin HE shan LIN Chun-Cheng LIU xiao-Jun jiang Liao-Chuan jiang Ji-Jun Chemistry Department Guangdong University of EducationGuangzhou 510303China Chemistry Department Sun Yat-Sen UniversityGuangzhou 510275China

Cu2O/Cu nanoparticles(NPs)in the nanoporous carbon matrix(designated as Cu2O/Cu@NPC)has been synthesized by in-situ calcination of a cupper-based metal-organic framework(Cu-MOF),and its morphology and composition were characterized by PXRD,SEM and ***,elemental mapping and XPS analysis not only show Cu NPs is generated along with nitrogen(N)-doped carbon,but also indicate Cu2O NPs locates in the external layer of Cu@*** addition,the adsorption of dye studies implies that Cu2O/Cu@NPC exhibits obvious interaction with Rhodamine B(Rh B)due to the feature of porous and N-doped ***2O/Cu@NPC has highly electrocatalytic performance for glucose and mercury(Ⅱ)with wide detection range and good stability,which can be used as a novel multifunctional sensor for glucose and mercury(Ⅱ).

关键词： electrochemical sensor glucose mercury(Ⅱ)ions metal-organic frameworks pyrolysis