检索结果-南通市图书馆

A GPU accelerated Boussinesq-type model for coastal waves

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2022年第9期41卷 158-168页

作者： Kezhao Fang Jiawen Sun Guangchun song Gang Wang Hao Wu Zhongbo Liu State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian116024China National Marine Environmental Monitoring Center Dalian116023China Marine Geological Resources Survey Center of Hebei Province Qinhuangdao066001China College of Transportation Engineering Dalian Maritime UniversityDalian116026China

This study presents an efficient Boussinesq-type wave model accelerated by a single Graphics Processing Unit(GPU).The model uses the hybrid finite volume and finite difference method to solve weakly dispersive and nonlinear Boussinesq equations in the horizontal plane,enabling the model to have the shock-capturing ability to deal with breaking waves and moving shoreline properly.The code is written in CUDA C.To achieve better performance,the model uses cyclic reduction technique to solve massive tridiagonal linear systems and overlapped tiling/shared memory to reduce global memory access and enhance data reuse.Four numerical tests are conducted to validate the GPU implementation.The performance of the GPU model is evaluated by running a series of numerical simulations on two GPU platforms with different hardware configurations.Compared with the CPU version,the maximum speedup ratios for single-precision and double-precision calculations are 55.56 and 32.57,respectively.

关键词： Boussinesq model GPU speedup ratio coastal waves

Hydrate formation in oil–water systems: Investigations of the influences of water cut and anti-agglomerant

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2020年第2期28卷 369-377页

作者： Guangchun song Yuxing Li Wuchang Wang Kai Jiang Zhengzhuo Shi Shupeng Yao Shandong Province Key Laboratory of Oil-Gas Storage and Transportation Safety China University of PetroleumQingdao 266580China

To investigate the characteristics of hydrate formation in oil–water systems, a high-pressure cell equipped with visual windows was used where a series of hydrate formation experiments were performed from natural gas + diesel oil + water systems at different water cuts and anti-agglomerant concentrations. According to the temperature and pressure profiles in test experiments, the processes of hydrate formation under two kinds of experimental procedures were analyzed first. Then, based on the experimental phenomena observed through the visual windows, the influences of water cut and anti-agglomerant on the places of hydrate formation and distribution, hydrate morphologies and hydrate morphological evolvements were investigated. Hydrate agglomeration, hydrate deposition and hydrate film growth on the wall were observed in experiments. Furthermore, three different mechanisms for hydrate film growth on the wall were identified. In addition, the influences of water cut and anti-agglomerant on the induction time of hydrate formation were also studied.

关键词： Hydrates Formation Oil–water system Water cut Anti-agglomerant

Hydrate agglomeration modeling and pipeline hydrate slurry flow behavior simulation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2019年第1期27卷 32-43页

作者： Guangchun song Yuxing Li Wuchang Wang Kai Jiang Zhengzhuo Shi Shupeng Yao Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety College of Pipeline and Civil EngineeringChina University of Petroleum

Dynamic modeling and numerical simulation of hydrate slurry flow behavior are of great importance to offshore hydrate management.For this purpose, a dynamic model of hydrate agglomeration was proposed in this paper.Based on population balance equation, the frame of the dynamic model was established first, which took both hydrate agglomeration and hydrate breakage into consideration.Then, the calculating methods of four key parameters involved in the dynamic model were given according to hydrate agglomeration dynamics.The four key parameters are collision frequency, agglomeration efficiency, breakage frequency and the size distribution of sub particles resulting from particle breakage.After the whole dynamic model was built, it was combined with several traditional solid–liquid flow models and then together solved by the CFD software FLUENT 14.5.Finally, using this method, the influences of flow rate and hydrate volume fraction on hydrate particle size distribution, hydrate volume concentration distribution and pipeline pressure drop were simulated and analyzed.

关键词： Hydrate Agglomeration Flow behavior Dynamic model Numerical simulation Population balance

HDS of dibenzothiophenes and hydrogenation of tetralin over a SiO2 supported Ni-Mo-S catalyst

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2015年第3期9卷 336-348页

作者： Qiang Wei Jinwen Chen Chaojie song guangchun Li Natural Resources Canada CanmetENERGY-Devon One Oil Patch Drive Devon AB T9G 1A8 Canada Energy Mining & Environment National Research Council Canada 4250 westbrook Mall Vancouver BC V6J 1W5 Canada

一出一步舞综合了在 SiO 2 上支持的 Ni-Mo-S 催化剂被准备并且为 dibenzothiophene (DBT ) 的 hydrodesulphurization (HDS ) 使用了，并且 4,6-dimethyl-dibenzothiophene (4,6-DMDBT ) ，并且为 tetralin 的加氢。催化剂在 280 祮漠... 详细信息

关键词：负载催化剂二苯并噻吩加氢脱硫 SiO2 四氢萘 HDS活性 DBT 催化剂表面

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国共产党伟大建党精神的形成

河北旅游职业学院学报 2022年第3期27卷 12-16页

作者：宋广春中共承德市委党校党史党建教研室河北承德067000

习总书记在2021年7.1讲话中首次阐述了建党精神。伟大建党精神的形成有着特定的历史背景和实践基础。伟大实践塑造伟大精神。伟大建党精神产生于伟大的建党实践。建党实践不是一时、一地、一人之举,而是历经多年、在中华大地上由广大爱... 详细信息

习总书记在2021年7.1讲话中首次阐述了建党精神。伟大建党精神的形成有着特定的历史背景和实践基础。伟大实践塑造伟大精神。伟大建党精神产生于伟大的建党实践。建党实践不是一时、一地、一人之举,而是历经多年、在中华大地上由广大爱国志士发起的一次伟大壮举。在充满斗争、艰险的过程中孕育出了伟大的建党精神。

关键词：伟大建党精神形成历史背景实践活动

Genomics in Neurological Disorders

在线全文

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinformatics 2014年第4期12卷 156-163页

作者： guangchun Han Jiya Sun Jiajia Wang Zhouxian Bai Fuhai song Hongxing Lei CAS Key Laboratory of Genome Sciences and Information Beijing Institute of Genomics Chinese Academy of Sciences University of Chinese Academy of Sciences Center of Alzheimer’s Disease Beijing Institute for Brain Disorders

Neurological disorders comprise a variety of complex diseases in the central nervous system, which can be roughly classified as neurodegenerative diseases and psychiatric disorders. The basic and translational research of neurological disorders has been hindered by the difficulty in accessing the pathological center （i.e., the brain） in live patients. The rapid advancement of sequencing and array technologies has made it possible to investigate the disease mechanism and biomarkers from a systems perspective. In this review, recent progresses in the discovery of novel risk genes, treatment targets and peripheral biomarkers employing genomic technologies will be dis- cussed. Our major focus will be on two of the most heavily investigated neurological disorders, namely Alzheimer＇s disease and autism spectrum disorder.

关键词： Brain transcriptome Genome-wide associationstudy Whole exome sequencing Epigenome profiling Biomarker

Migration to gliomas of bone mesenchymal stem cells transfected with cytosine deaminase gene following transplantation in vivo

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2011年第19期6卷 1462-1466页

作者： guangchun Ji Fei song Qi Xing Jian Liu Kedong song Daqing Zhang Zihan Wang The Second Affiliated Clinical College of Dalian Medical University Dalian 116023 Liaoning Province China The First Affiliated Clinical College of Dalian Medical University Dalian 116011 Liaoning Province China Institute of Chemical Engineering Dalian University of Technology/Dalian Stem Cell and Tissue Engineering Research and Development Center Dalian 116024 Liaoning Province China Dalian Central Hospital Dalian 116033 Liaoning Province China

This experiment sought to observe the migration and distribution of bone mesenchymal stem cells transfected with the cytosine deaminase gone （BMSCs-CD/eGFP） after transplantation in vivo through three pathways. In addition, we examined the tropism of these cells to glioma. Intracranial C6 glioma models were established in Sprague-Dawley rats using an intracranial stereotactic inoculation method. When tumors were 7 days old, rats were inoculated with lx106 BMSCs-CD/eGFP cells via the tumor-bearing internal carotid artery, the contralateral hemisphere and the tumor-bearing glioma. Fluorescence microscopy revealed that BMSCs-CD/eGFP exhibited a strong capacity for migration to tumors. BMSCs-CD/eGFP transplanted via the tumor-bearing intemal carotid artery were observed to distribute in glioma tissues. BMSCs-CD/eGFP inoculated via the ipsilateral glioma mainly located within and at the edge of glioma tissues. BMSCs-CD/eGFP inoculated via the contralateral hemisphere mainly distributed at the proximal end of the tumor at the incubation site.

关键词： cytosine deaminase gone bone mesenchymal stem cells glioma transduction migration

Towards Personalized Intervention for Alzheimer's Disease

在线全文

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinformatics 2016年第5期14卷 289-297页

作者： Xing Peng Peiqi Xing Xiuhui Li Ying Qian Fuhai song Zhouxian Bai guangchun Han Hongxing Lei CAS Key Laboratory of Genome Sciences and Information Beijing Institute of GenomicsChinese Academy of Sciences Cunji Medical School University of Chinese Academy of Sciences Center of Alzheimer’s Disease Beijing Institute for Brain Disorders

Alzheimer＇s disease （AD） remains to be a grand challenge for the international community despite over a century of exploration. A key factor likely accounting for such a situation is the vast heterogeneity in the disease etiology, which involves very complex and divergent pathways. Therefore, intervention strategies shall be tailored for subgroups of AD patients. Both demographic and in-depth information is needed for patient stratification. The demographic information includes primarily APOE genotype, age, gender, education, environmental exposure, life style, and medical history, whereas in-depth information stems from genome sequencing, brain imaging, peripheral biomarkers, and even functional assays on neurons derived from patient-specific induced pluripotent cells （iPSCs）. Comprehensive information collection, better understanding of the disease mech- anisms, and diversified strategies of drug development would help with more effective intervention in the foreseeable future.

关键词： Alzheimer＇s disease Demographic information Genome Peripheral biomarkers iPSC technology

Web Resources for Stem Cell Research

在线全文

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinformatics 2015年第1期13卷 40-45页

作者： Ting Wei Xing Peng Lili Ye Jiajia Wang Fuhai song Zhouxian Bai guangchun Han Fengmin Ji Hongxing Lei College of Life Sciences and Bioengineering Beijing Jiaotong University CAS Key Laboratory of Genome Sciences and Information Beijing Institute of Genomics Chinese Academy of Sciences University of Chinese Academy of Sciences Center of Alzheimer's Disease Beijing Institute for Brain Disorders

In this short review, we have presented a brief overview on major web resources relevant to stem cell research. To facilitate more efficient use of these resources, we have provided a preliminary rating based on our o... 详细信息

关键词： Reprogramming Direct conversion Physical interaction Regulatory interaction Network