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Alpine vegetation responses to snow phenology in the Chinese Tianshan mountainous region

Journal of Mountain Science 2022年第5期19卷 1307-1323页

作者： ZHANG Bo LI Xue-mei LI Chao NYIRANSENGIYUMVA christine QIN Qi-yong Faculty ofGeomatics Lanzhou Jiaotong UniversityLanzhou 730070China Gansu Provincial Engineering Laboratory for National Geographic State Monitoring Lanzhou 730070China National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring Lanzhou 730070China College of Urban and Environmental Science Northwest UniversityXian 710127China

Investigating the interrelation between snow and vegetation is essential to explain the response of alpine ecosystems to climate *** on the MOD10 A1 daily cloud-free snow product and MOD13 A1 NDVI(normalized difference vegetation index)data,this study analysed the spatial and temporal patterns of snow phenology including snow onset date,snow end date,snow cover days,and vegetation phenology including the start of growing season,the end of growing season and the length of growing season in the Chinese Tianshan Mountainous Region(CTMR)from 2002 to 2018,and then investigated the snow phenological effects on the vegetation phenology among different ecogeographic zones and diverse vegetation *** results indicated that snow onset date was earlier at higher elevations and later at lower elevations,while snow end date showed opposite spatial distribution *** end of growing season occurred later on the northwest slope of the CTMR and the Yili *** earliest end of growing season was in the middle part of the CTMR.A long growing season was mainly distributed along the northern slope and the Yili Valley,while a short growing season was concentrated in the middle part of the *** response of vegetation phenology to changes in snow phenology varied among vegetation types and ecogeographic *** effect of snow phenology on vegetation phenology was more significant in IID5(Yili Valley)than in the other ecogeographic zones.A negative correlation was observed between the start of growing season and snow end date in nearly 54.78%of the study area,while a positive correlation was observed between the start of growing season and the snow end date in 66.85%of the study *** sensitivity of vegetation phenology to changes in snow cover varied among different vegetation *** onset date had the greatest effect on the start of growing season in the four vegetation cover types(alpine meadows,alpine steppes,shrubs,and alpine sparse vegetati

关键词： Snow phenology Vegetation phenology Climate change Response mechanism Grey correlation analysis Chinese Tianshan Mountainous Region

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Memory access optimization for particle operations in computational fluid dynamics-discrete element method simulations

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Particuology 2023年第7期78卷 97-110页

作者： Deepthi Vaidhynathan Hariswaran Sitaraman Ray Grout Thomas Hauser christine M.Hrenya Jordan Musser Computational Science Center National Renewable Energy LaboratoryUnited States Research Computing University of ColoradoBoulderUnited States Chemical and Biological Engineering University of ColoradoBoulderUnited States Computational Science and Engineering National Energy Technology LaboratoryUnited States

Computational Fluid Dynamics-Discrete Element Method is used to model gas-solid systems in several applications in energy,pharmaceutical and petrochemical *** performance bot-tlenecks often limit the problem sizes that can be simulated at industrial *** data structures used to store several millions of particles in such large-scale simulations have a large memory footprint that does not fit into the processor cache hierarchies on current high-performance-computing platforms,leading to reduced computational *** paper specifically addresses this aspect of memory access bottlenecks in industrial scale *** use of space-flling curves to improve memory access patterns is described and their impact on computational performance is quantified in both shared and distributed memory parallelization *** Morton space flling curve applied to uniform grids and k-dimensional tree partitions are used to reorder the particle data-structure thus improving spatial and temporal locality in *** performance impact of these techniques when applied to two benchmark problems,namely the homogeneous-cooling-system and a fluidized-bed,are *** optimization techniques lead to approximately two-fold performance improvement in particle focused operations such as neighbor-list creation and data-exchange,with~1.5 times overall improvement in a fluidization simulation with 1.27 million particles.

关键词： CFD-DEM Memory access optimization Spatial reordering Performance optimization

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Experimental investigation on local shear stress and turbulence intensities over a rough non-uniform bed with and without sediment using 2D particle image velocimetry

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International Journal of Sediment Research 2020年第2期35卷 193-202页

作者： Petr Lichtneger christine Sindelar Johannes Schobesberger Christoph Hauer Helmut Habersack CD-Laboratory of Sediment Research and Management Institute of Water ManagementHydrology and Hydraulic EngineeringDepartment Water-Atmosphere-EnvironmentUniversity of Natural Resources and Life Sciences

The current work focuses on locally resolving velocities,turbulence,and shear stresses over a rough bed with locally non-uniform character.A nonporous subsurface layer and fixed interfacial sublayer of gravel and sand were water-worked to a nature-like bed form and additionally sealed in a hydraulic ***-dimensional Particle Image Velocimetry(2 D-PIV) was applied in the vertical plane of the experimental flume *** with clear water and weak sediment transport were done under slightly supercritical flow to ensure sediment transport conditions without formation of considerable sediment deposits or *** study design included analyzing the double-averaged flow parameters of the entire measurement domain and investigating the flow development at 14 consecutive vertical *** geometrical variabilities as well the presence of sediment were mainly reflected in the vertical velocity *** the vertical velocity decreased over the entire depth in presence of sediment transport,the streamwise velocity profile was reduced only within the interfacial *** the region with decelerating flow conditions,however,the streamwise velocity profile systematically increased along the entire depth *** increase in the main velocity(reduction of flow resistance)correlated with a decrease of the turbulent shear and main normal ***,effects of rough bed smoothening and drag force reduction were experimentally documented within the interfacial sublayer due to mobile ***,the current study leads to the conclusion that in nonuniform flows the maximum Reynolds stress values are a better predictor for the bed shear stress than the linearly extrapolated Reynolds stress *** is an important finding because,in natural flows,uniform conditions are rare.

关键词： Turbulence measurement Local bed shear stress Sediment transport and flow interaction Hydraulic flume experiment Particle image velocimetry

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水泥水化与水化硅酸钙的结构和化学组成之间的相互作用（英文）

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硅酸盐学报 2015年第10期43卷 1324-1330页

作者： Denis DAMIDOT christine LORS Civil and Environmental Engineering Department Ecole des Mines de Douai Douai 59508 France

研究了硅酸盐水泥水化动力学与水化过程中水化硅酸钙(C-S-H)形成之间的相互作用。结果表明:水泥水化反应过程中的液相组成对C-S-H的成核与生长速率有很大的影响。因此,对于不同的水泥,C_3S、C_2S和方解石表面的无序纳米C-S-H颗粒团聚体... 详细信息

研究了硅酸盐水泥水化动力学与水化过程中水化硅酸钙(C-S-H)形成之间的相互作用。结果表明:水泥水化反应过程中的液相组成对C-S-H的成核与生长速率有很大的影响。因此,对于不同的水泥,C_3S、C_2S和方解石表面的无序纳米C-S-H颗粒团聚体的结构变化很大;掺加矿物掺合料和温度变化对此也有很大影响。C-S-H的化学组成直接取决于液相组成。硅酸盐水泥水化诱导期由C-S-H的成核速率决定。同时,水泥1 d的水化程度主要与C-S-H生长模式和速率有关;影响水泥1 d水化程度的因素主要是C-S-H生长的速率和模式,以及水分子和离子透过水泥颗粒表面已形成的C-S-H层的渗透性。因此,如果调控C-S-H成核和生长的速率的参数已知,则可以有效地控制硅酸盐水泥的早期水化,特别是可有效提高水泥水化程度,在可持续发展理念的基础上达到水泥的高效利用。

关键词：硅酸盐水泥动力学水化水化硅酸钙成核与生长水化诱导期

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如何理解有意义的工作环境

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中国质量 2024年第5期 69-70页

作者：克里斯汀·舍弗尔王晓生

贵组织是否正面临员工的高流动率和低签约率的挑战，特别是一线员工？更重要的是你们是否准备好面对劳动者的需求，以在将来可以吸引和保持高业绩员工？无论哪种情况，罗伯特马钦科都能给大家带来新想法、新启发。马钦科是踪迹之径（Tra...

贵组织是否正面临员工的高流动率和低签约率的挑战，特别是一线员工？更重要的是你们是否准备好面对劳动者的需求，以在将来可以吸引和保持高业绩员工？无论哪种情况，罗伯特马钦科都能给大家带来新想法、新启发。马钦科是踪迹之径（TrailPaths）公司的总裁，该公司关注于建立有意义的员工环境，他将在美国第35届波多里奇追求卓越大会闭幕式上发表第二个主旨发言。

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TECHNIQUES OF CONSTRUCTING REGIONAL INPUT-OUTPUT TABLES: ACHIEVEMENTS

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Chinese Geographical Science 1992年第4期2卷 47-66页

作者：金玉献 christine MLeigh School of Geography the University of leeds leeds LS2 9JT England

The development of any analytical method should have to experience at least four stages: its initial status, growth, mature and declining. However, although the regional input-output analysis has been widely applied for more than forty years, it is still one of the most important approach in regional economic analysis and forecast at present in the world. This is due to the never ended modifications and its great potentials. In this paper, we review the historical development of the regional input-output analysis.

关键词： Input-output regional research regional input-output models

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Loss of ID3 in pancreatic cancer cells increases DNA damage without impairingMDC1 recruitment to the nuclear foci

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Cancer Communications 2022年第3期42卷 269-272页

作者： Jian Xu Mayrel Palestino Dominguez christine Alewine Laboratory of Molecular Biology Center for Cancer ResearchNational Cancer InstituteNational Institutes of HealthBethesdaMD 20892-4264United States

Dear Editor,Pancreatic cancer is one of the most aggressive human cancers and is predicted to become the second leading cause of cancer-related death by the year 2030[1,2].In the United States,approximately 60,000 newly diagnosed cases and 48,000 deaths were estimated to occur in 2021[3].Because early screening is very difficult and most patients are diagnosed with advanced disease,curing pancreatic cancer patients still faces huge ***,a comprehensive understanding of the pathogenesis of pan-creatic cancer is required to promote the development of efficient treatment modalities.

关键词： damage death ID3

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COMPARISON OF AMINOLEVULINIC ACID AND ITS METHYL ESTER MEDIATED PHOTOCYTOTOXICITY ON HUMAN NASOPHARYNGEAL CARCINOMA CELLS

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Journal of Innovative Optical Health Sciences 2012年第2期5卷 25-33页

作者： christine M.N.YOW RICKY W.K.WU ZHENG HUANG Medical Laboratory Science Department of Health Technology Informatics Hong Kong Polytechnic University Hong Kong SARChina Department of Radiation Oncology University of Colorado Denver COUSA MOE Key Laboratory of OptoElectronic Science and Technology for Medicine Fujian Normal University FuzhouChina

Nasopharyngeal carcinoma(NPC)is a prevalent cancer in some areas of southern *** explore the potential of photodynamic therapy(PDT)for the treatment of NPC,a small molecule prodrug 5-aminolevulinic acid(ALA)and its methyl ester(MAL)mediated PDT was studied in *** results showed that human NPC cells were sensitive to both ALA-and MAL-mediated ***,ALA was more effective than MAL,possiblly due to a higher efficiency of ALA on producing endogenous protoporphyrin(PpIX)in NPC *** ALA nor MAL caused any significant *** ALA-based PDT might be a useful modality in the treatment ofNPC.

关键词： Aminolevulinic acid methylaminolevulinate nasopharyngeal carcinoma photodynamic therapy

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A peptide containing the receptor binding site of insulin-like growth factor binding protein-2 enhances bone mass in ovariectomized rats

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Bone Research 2018年第3期6卷 280-288页

作者： Gang Xi christine Wai Clifford J.Rosen David R.Clemmons Department of Medicine University of North Carolina at Chapel HillChapel HillUSA Maine Medical Center Research Institute ScarboroughUSA

Male Igfbp2-/-mice have a significant reduction in bone mass and administration of a peptide that contains the insulin-like growth factor binding protein-2(IGFBP-2) receptor-binding domain stimulates bone formation in these animals. Female Igfbp2-/-mice do not have this phenotype but following ovariectomy(OVX) lose more bone than OVX wild-type mice. This suggests that in the absence of estrogen, IGFBP-2 is required to maintain bone mass. Therefore these studies were undertaken to determine if this peptide could stimulate bone acquisition in OVX rats. OVX rats were divided into seven treatment groups: sham animals, OVX animals, OVX animals receiving a control scrambled peptide, or one of three doses of the active peptide termed PEG-HBD-1(0.7, 2,and 6 mg·kg^(-1)) and an OVX group receiving parathyroid hormone(PTH)(50 μg·kg-1 per day). The peptides were administered for8 weeks. DXA revealed a significant reduction in femoral and tibial areal bone mineral density(aBMD) after OVX, whereas treatment with the high-dose peptide increased aBMD by 6.2% ± 2.4%(P < 0.01) compared to control peptide; similar to the increase noted with PTH(5.6% ± 3.0%, P < 0.01). Similar increases were noted with two lower doses of the peptide(3.8% ± 1.5%, P < 0.05 for low dose; 3.1% ± 1.6%, P = 0.07 for middle dose). Micro CT showed that the OVX control peptide animals had reductions of 41% and64% in femoral trabecular BV/TV and trabecular number, respectively. All three doses of the peptide increased bone volume/total volume(BV/TV) significantly, while the low and middle doses increased trabecular number. Cortical BV/TV and thickness at the midshaft increased significantly with each dose of peptide(18.9% ± 9.8%, P < 0.01 and 14.2% ± 7.9%, P < 0.01 for low dose; 23.7% ±10.7%, P < 0.001 and 15.8% ± 6.1%, P < 0.001 for middle dose; 19.0% ± 6.9%, P < 0.01 and 16.2% ± 9.7%, P < 0.001 for high dose)and with PTH(25.8% ± 9.2%, P < 0.001 and 19.4% ± 8.8%, P < 0.001). Histomorphometry showed that the low

关键词： insulin-like growth factor binding protein-2 OVX wild-type mice

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Decreased post-synaptic density-95 protein expression on dendrites of newborn neurons following CX3CR1 modulation in the epileptogenic adult rodent brain

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Cellular & Molecular Immunology 2018年第4期15卷 414-417页

作者： Idrish Ali Una Avdic Deepti Chugh christine T Ekdahl Division of Clinical Neurophysiology Lund UniversityLund SE-22184Sweden Lund Epilepsy Center Lund UniversityLund SE-22185Sweden

Temporal lobe seizures generate a large pool of new hippocampal neurons in the adult *** role within the hyperexcitable neuronal network and how they are regulated by the immune response is *** and its receptor CX3CR1 constitute a chemokine pathway known to modulate the immune response in temporal lobe ***,6 weeks of intracerebroventricular infusion of anti-CX3CR1 antibody,starting 1 week after electrically induced prolonged seizures in the temporal lobe(status epilepticus(SE)),reduced microglial activation within the hippocampus.

关键词： CX3CR1 epilepsy infusion

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