检索结果-南通市图书馆

Science China Earth Sciences 2015年第6期58卷 996-1004页

作者： guan yue SHEN ShiFei HUANG Hong Institute of Public Safety Research Department of Engineering Physics Tsinghua University

After the damage of Fukushima Daiichi Nuclear Power Plant, a great number of radioactive materials were released into the Pacific Ocean. Therefore, it is necessary to research on the temporal and spatial distribution of these radionuclides. We use Princeton Ocean Model to simulate the circulation of the coast water of Fukushima NPP and obtain the concentration of caesium-137 by solving the diffusion equations. We employ the Monte Carlo N-particle(MCNP) code to assess the external doses caused by these contaminated sea water. To improve the efficiency and effectiveness of volume source in MCNP code, we establish a transformation method between spot source and volume source, and determine an appropriate range of volume source. Finally, we calculate the absorbed doses of every organ/tissue and the effective dose of a human body.

关键词： numerical simulation POM caesium-137 MCNP absorbed dose effective dose

Detection of CO Outflow in Rotating Cores

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Astronomy and Astrophysics 2008年第2期8卷 230-236页

作者： Xin guan yue-Fang Wu Department of Astronomy Peking University Beijing 100871

We investigate the effect of bulk motion on the detection of molecular outflows in the sources S146, GGD27, and IRAS 22566＋5830. The traditional techniques do allow for bulk motions or systematic VLSR shifts of the core emissions, which may cause contamination of the high velocity gas emissions, and outflows may either fail to be detected or have their properties miscalculated. We used a program to follow the systematic shift of VLSR and better results have been obtained.

关键词： ISM: jets and outflows -- ISM: kinematics and dynamics -- ISM: molecules-- stars: formation

Progress on statistical models of evaluating inclusions in clean steels

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2022年第8期29卷 1153-1163页

作者： Zheng Wang yue-hui guan Hai-wen Luo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Jiang Yin Xing Cheng Alloy Material Co. Ltd.Jiangyin 214432JiangsuChina

Non-metallic inclusions are critical for the fatigue failure of clean steels in service;especially,the large and hard inclusions are *** it is not possible to measure all the inclusions in the large-volume clean steels,statistical models have been developed to evaluate inclusions,aiming at predicting the maximum inclusion size in the large volume from the data of inclusions,which are derived from the limited observations on small-volume *** statistical models were reviewed together with their supporting *** particular,the block maxima and the threshold types of models were discussed through a thorough comparison as they are both widely used and based on the extreme value *** predicted results not only are used to distinguish the different cleanliness levels of steels,but also help to estimate fatigue ***,future research is proposed to focus on tackling the present difficulties encountered by statistical models,including the sufficient credibility of obtained results and the robustness of models for applications.

关键词： Clean steel Maximum inclusion prediction Statistical model Extreme value theory Fatigue failure

Challenges of Processing and Analyzing Big Data in Mesoscopic Whole-brain Imaging

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

Genomics, Proteomics & Bioinformatics 2019年第4期17卷 337-343页

作者： Anan Li yue guan Hui Gong Qingming Luo Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China MOE Key Laboratory for Biomedical Photonics School of Engineering SciencesHuazhong University of Science and TechnologyWuhan 430074China HUST-Suzhou Institute for Brainsmatics JITRI Institute for BrainsmaticsSuzhou 215125China

The brain is recognized as the most complex organ on *** complex neuronal network in the human brain consists of approximately 86 billion neurons and more than one hundred trillion connections[1].Even the mouse brain,which is commonly used as a model in neuroscience studies,contains more than 71 million *** the great efforts made by the neuroscientists,our knowledge about the brain is still limited and studies on small model animals have only provided preliminary results[2–4].To improve the situation,brainsmatics studies try to accelerate neuroscience research by providing a standard whole-brain spatial coordinate system and standardized labeling tools,imaging the brain,as well as discovering new neuronal cell types,neuronal circuits,and brain vascular structures.

关键词： Whole spite coordinate

Diesel molecular composition and blending modeling based on SUBEM framework

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2022年第2期19卷 839-847页

作者： yue-Ming guan Dong guan Cheng Zhang Sheng-Hua Yuan guang-Qing Cai Lin-Zhou Zhang State Key Laboratory of Heavy Oil Processing Petroleum Molecular Engineering Center(PMEC)China University of PetroleumBeijing102249China SINOPEC Dalian Research Institute of Petroleum and Petrochemicals SINOPECDalian116045LiaoningChina

Diesel molecular compositional model has important application for diesel quality prediction,blending,and molecular-level process model *** this paper,different types of diesel molecular compositional and blending models were constructed based on the SU-BEM *** than 1500 representative molecules were selected to form the molecular structure *** probability density functions(PDFs)combination was determined by experimental data and experience.A quadratic optimization strategy combining genetic algorithm with local optimization algorithm was adopted to improve the accuracy of the compositional *** model results show good agreement with the experimental *** diesel blending model was constructed at the molecular-level based on the above diesel compositional *** properties of the blending model accord with the experimental *** is proved that the compositional models and blending model constructed have high accuracy and strong prediction capability,and are applicable to the industrial process.

关键词： Molecular compositional model Molecular blending model SU-BEM Framework Diesel

Expression profiles of microRNAs after focal cerebral ischemia/reperfusion injury in rats

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2012年第12期7卷 917-923页

作者： Fengguo Zhai Xiuping Zhang yue guan Xudong Yang Yang Li Gaochen Song Lixin guan Department of Pharmacology Mudanjiang Medical University Mudanjiang 157011 Heilongjiang Province China Department of Endocrinology Mudanjiang Medical University Mudanjiang 157011 Heilongjiang Province China Department of Thoracic Surgery Mudanjiang Medical University Mudanjiang 157011 Heilongjiang Province China Department of Biochemistry Mudanjiang Medical University Mudanjiang 157011 Heilongjiang Province China

Rat models of focal cerebral ischemia/reperfusion injury were established by occlusion of the middle cerebral artery. Microarray analysis showed that 24 hours after cerebral ischemia, there were nine up-regulated and 27 down-regulated microRNA genes in cortical tissue. Bioinformatic analysis showed that bcl-2 was the target gene of microRNA-384-5p and microRNA-494, and caspase-3 was the target gene of microRNA-129, microRNA-320 and microRNA-326. Real-time PCR and western blot analyses showed that 24 hours after cerebral ischemia, bcl-2 mRNA and protein levels in brain tissue were significantly decreased, while caspase-3 mRNA and protein levels were significantly increased. This suggests that following cerebral ischemia, differentially expressed microRNA-384-5p, microRNA-494, microRNA-320, microRNA-129 and microRNA-326 can regulate bcl-2 and caspase-3 expression in brain tissue.

关键词： focal cerebral ischemia microRNA apoptosis bcl-2 caspase-3 neural regeneration

Effects of the planarity and heterogeneity of networks on evolutionary two-player games

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第12期27卷 164-171页

作者： Xu-Sheng Liu Zhi-Xi Wu Jian-yue guan Institute of Computational Physics and Complex Systems Lanzhou University

We study the effects of the planarity and heterogeneity of networks on evolutionary two-player symmetric games by considering four different kinds of networks, including two types of heterogeneous networks: the weighted planar stochastic lattice(a planar scale-free network) and the random uncorrelated scale-free network with the same degree distribution as the weighted planar stochastic lattice; and two types of homogeneous networks: the hexagonal lattice and the random regular network with the same degree k_0= 6 as the hexagonal lattice. Using extensive computer simulations, we found that both the planarity and heterogeneity of the network have a significant influence on the evolution of cooperation, either promotion or inhibition, depending not only on the specific kind of game(the Harmony, Snowdrift, Stag Hunt or Prisoner's Dilemma games), but also on the update rule(the Fermi, replicator or unconditional imitation rules).

关键词： evolutionary two-player games planarity heterogeneity

Non-monotonic behavior of jam probability and stretchedexponential distribution in pedestrian counterflow

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第9期33卷 259-266页

作者： Ze-Hao Chen Zhi-Xi Wu Jian-yue guan College of Physical Science and Technology Guangxi Normal UniversityGuilin 541004China Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu Provinceand Key Laboratory for Quantum Theory and Applications of the Ministry of EducationLanzhou UniversityLanzhou 730000China

We adopt a floor field cellular automata model to study the statistical properties of bidirectional pedestrian flow movingin a straight corridor. We introduce a game-theoretic framework to deal with the conflict of multiple pedestrians tryingto move to the same target location. By means of computer simulations, we show that the complementary cumulative distributionof the time interval between two consecutive pedestrians leaving the corridor can be fitted by a stretched exponentialdistribution, and surprisingly, the statistical properties of the two types of pedestrian flows are affected differently by theflow ratio, i.e., the ratio of the pedestrians walking toward different directions. We also find that the jam probability exhibitsa non-monotonic behavior with the flow ratio, where the worst performance arises at an intermediate flow ratio of around0.2. Our simulation results are consistent with some empirical observations, which suggest that the peculiar characteristicsof the pedestrians may attributed to the anticipation mechanism of collision avoidance.

关键词： traffic and crowd dynamics evolutionary game theory

Thickness dependence of the crystallization and phase transition in ZrO_(2)thin films

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2023年第4期12卷 822-829页

作者： yue guan Jing Zhou Haodong Zhong Weipeng Wang Zhengjun Zhang Feng Luo Shuai Ning School of Materials Science and Engineering Smart Sensing Interdisciplinary Science CenterNankai UniversityTianjin 300350China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

Fluorite-structure binary oxides(e.g.,HfO_(2)and ZrO_(2))have attracted increasing interest for a broad range of applications including thermal barrier coatings,high-k dielectrics,and novel ferroelectrics.A crystalline structure plays a crucial role in determining physical and chemical *** evolution of ZrO_(2)thin films,particularly down to the nanometer scale,has not been thoroughly *** this work,we carried out systematic annealing analysis on the ZrO_(2)thin *** in-situ high-temperature X-ray diffraction(XRD)characterizations,a thickness dependence of crystallization and phase transition is *** of the thickness(10-300 nm),the as-prepared amorphous ZrO_(2)thin films are preferentially crystallized into a tetragonal(t)structure(high-temperature phase),which can be preserved down to room temperature(RT)upon anncaling at the corresponding crystallization temperaturc(T).When anncaling at temperaturcs higher than Tc,the transition from t to monoclinic(m;RT phase)will occur,and the quantity of the transition strongly depends on the film *** work expands the basic understanding of the phase transition in the ZrO_(2)thin films,and offers a path to the selective control over the phase structure for novel functionalities.

关键词： zirconia crystallization tetragonal(t) monoclinic(m) phase transition

More Cycles of Intravenous Chemotherapy are Associated with Reduced Growth in Children with Retinoblastoma

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

Journal of Nutritional Oncology 2021年第3期6卷 126-133页

作者： Yu Qiong Yang Liang Yu Yin Xin Lin Bing Hao Xiao yue guan Hong Xia Xu Hong Feng Yuan Department of Ophthalmology Daping HospitalArmy Medical University(Third Military Medical University)Chongqing 400042China Department of Clinical Nutrition Daping HospitalArmy Medical University(Third Military Medical University)Chongqing 400042China Institute of Hepatopancreatobiliary Surgery Southwest HospitalArmy Medical University(Third Military Medical University)Chongqing 400038China

Background Chemotherapy can have a negative impact on the growth of children with different ***,few studies have examined whether intravenous chemotherapy(IVC)affects the growth of children with retinoblastoma(RB).The present study evaluated the height differences(actual height compared to the age standardized value)and survival of pediatric RB patients treated with *** This was an observational cohort study.A total of 87 pediatric RB patients were *** study population was stratified into two groups based on the number of chemotherapy cycles administered(≤4 versus>4).The height at baseline(before IVC),height after IVC and overall survival were compared between the two *** Before IVC,no height differences were observed between the two groups(P=0.585).After IVC,all of the patients had a reduced height compared to the age standardized height(P=0.035).Patients who underwent more cycles of chemotherapy had a greater height difference compared to those who received fewer cycles(P=0.008).For those who had reduced height,the difference was positively associated with the number of chemotherapy cycles(r=0.279,P=0.043).Among the patients who exhibited a greater height difference,those who underwent more than four cycles of chemotherapy had a decreased overall survival(P=0.042).Conclusions Pediatric RB patients who underwent more cycles of chemotherapy were more likely to have a reduced *** studies are needed to determine the optimal treatment strategy to prevent the reduced growth while maintaining the benefits of chemotherapy.

关键词： Retinoblastoma Intravenous chemotherapy Height Survival

同方期刊数据库