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Comparison of Thermal Performance for Two Types of ETFP System under Various Operation Schemes

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Computer Modeling in Engineering & Sciences 2020年第7期124卷 23-44页

作者： Lingtong Li Zaiguo fu Benxiang Li Qunzhi Zhu College of Energy and Mechanical Engineering Shanghai University of Electric PowerShanghai200090China Sino-Pipeline International Co. Ltd.Zhejiang312000China

The earth to fluid pipe(ETFP)system has been widely applied to various energy *** numerical model of the heat transfer process in the ETFP system with a shallow-buried horizontal or a deep-buried vertical U-shape pipe adopted in practical engineering was established and the model distinctions were pointed *** comparison of the thermal performance between the two types of ETFP system under various schemes was conducted on the basis of numerical *** results showed that the thermal parameters of the ETFP system with a shallow-buried horizontal pipe were influenced by the inlet velocity and ground temperature *** variation of the fluid temperature was smooth and the thermal influence zone was limited under the fixed *** proper intermittent operation scheme reduced 53.1%outlet fluid temperature *** contrast,the fluid temperature in the ETFP system with a deep-buried vertical U-shape pipe varied dramatically with the operation *** intermittent operation scheme with a relatively short interval led to a less temperature fluctuation of soil around the *** intermittent scheme is beneficial to the recovery of the thermal condition of soil around the U-shape *** results indicated a stark difference in thermal performance between the two types of *** study can provide guidance for the selection and operation of ETFP system in practical heat exchange engineering.

关键词： Heat transfer buried pipe ETFP heat exchange numerical simulation

Determination of minimum cover depth for shallow tunnel subjected to water pressure

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Journal of Central South University 2013年第8期20卷 2307-2313页

作者： HUANG fu QIN Chang-bing LI Shu-cai School of Civil Engineering and Architecture Changsha University of Science and Technology Changsha 410004 China School of Civil Engineering Central South University Changsha 410075 China Geotechnical and Structural Engineering Research Center Shandong University Jinan 250061 China

Prediction of the state of roof collapse is a big challenge in tunnel engineering, while the limit analysis theory makes it possible to derive the analytical solutions of the collapse mechanisms. In this work, an exact solution of collapsing shape in shallow underwater tunnel is obtained by using the variation principle and the upper bound theorem based on nonlinear failure criterion. Numerical results under the effect of river water and supporting pressure are derived and discussed. The maximum water depth above the river bottom surface is determined under a given buried depth of shallow cavities and the critical depth of roof collapse is obtained under a constant river depth. In comparison with the previous results, the present solution shows a good agreement with the practical results.

关键词： shallow underwater subway roof collapse nonlinear failure criterion

Hole mobility enhancement in uniaxial stressed Ge dependence on stress and transport direction

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Science China(Physics,Mechanics & Astronomy) 2014年第10期57卷 1860-1865页

作者： MA JianLi fu ZhiFen LIU Peng ZHANG HeMing School of Physics and Information Technology Shaanxi Normal University Key Laboratory of Ministry of Education for Wide Band-Gap Semiconductor Materials and Devices Xidian University

Utilizing a six-band k.p valence band calculations that considered a strained perturbation Hamiltonian, uniaxial stress-induced valence band structure parameters for Ge such as band edge energy shift, split, and effective mass were quantitatively evaluated. Based on these valence band parameters, the dependence of hole mobility on uniaxial stress(direction, type, and magnitude) and hole transport direction was theoretical studied. The results show that the hole mobility had a strong dependence on the transport direction and uniaxial stress. The hole mobility enhancement can be found for all transport directions and uniaxial stess configurations, and the hole transport along the [110] direction under the uniaxial [110] compressive stress had the highest mobility compared to other transport directions and stress configurations.

关键词： Ge uniaxial stress valence band structure hole mobility

Effect of endogenous hydrogen sulfide on oxidative stress in oleic acid-induced acute lung injury in rats

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Chinese Medical Journal 2011年第21期124卷 3476-3480页

作者： WANG Cong WANG Hai-ying LIU Zhi-wei fu Yan ZHAO Bin Department of Emergency Medicine Beijing Jishuitan Hospital Beijing 100035 China

Background Acute lung injury （ALl） is a common critical disease in emergency care. Oxidative stress plays an important role in the pathogenesis of ALl. Endogenous hydrogen sulfide （H2S） can inhibit oxidative stress in rat gastric mucosal epithelium. In this study, we examined the possible role of H2S in regulation of the oxidative stress in oleic acid-induced acute lung injury in rats. Methods The rat model of ALl was induced by intra-tail vein injection of oleic acid （CA）. NariS solution was injected intraperitoneally before CA injection as an CA＋NariS group. A semi-quantitative histological index of quantitative assessment of lung injury was calculated. The levels of superoxide dismutase （SOD）, glutathione （GSH） and malondialdehyde （MDA） in plasma and lung tissue were detected with ELISA. The levels of H2S content in lung tissue were detected with an ion meter. Results Compared with the control group, the level of H2S in lung tissue was significantly decreased, and the level of SOD and GSH were decreased but the level of MDA was increased in plasma and lung tissue in rats with ALl. NariS lessened the ALl in association with an increase in the level of H2S in lung tissue, a decrease in the level of MDA but an increase in SOD and GSH levels in plasma and lung tissues. Conclusion Endogenous H2S could inhibit the oxidative stress in lung tissue in oleic acid-induced acute lung injury in rats.

关键词： acute lung injury hydrogen sulfide oxidative stress

Correlation Analysis of Molecularly-Defined Cortical Interneuron Populations with Morpho-Electric Properties in Layer V of Mouse Neocortex

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Neuroscience Bulletin 2023年第7期39卷 1069-1086页

作者： Jun-wei Cao Xiao-Yi Mao Liang Zhu Zhi-Shuo Zhou Shao-Na Jiang Lin-Yun Liu Shu-Qing Zhang Yinghui fu Wen-Dong Xu Yong-Chun Yu Jing’an District Central Hospital of Shanghai State Key Laboratory of Medical NeurobiologyMOE Frontiers Center for Brain ScienceInstitutes of Brain ScienceFudan UniversityShanghai 200032China School of Life Sciences Fudan UniversityShanghai 200433China Department of Vascular Surgery Shanghai Pudong HospitalFudan University Pudong Medical CenterShanghai 201399China School of Data Science Fudan UniversityShanghai 200433China The National Clinical Research Center for Aging and Medicine Huashan HospitalFudan UniversityShanghai 200032China

Cortical interneurons can be categorized into distinct populations based on multiple modalities,including molecular signatures and morpho-electrical(M/E)***,many transcriptomic signatures based on single-cell RNA-seq have been identified in cortical ***,whether different interneuron populations defined by transcriptomic signature expressions correspond to distinct M/E subtypes is still ***,we applied the Patch-PCR approach to simultaneously obtain the M/E properties and messenger RNA(mRNA)expression of>600 interneurons in layer V of the mouse somatosensory cortex(S1).Subsequently,we identified 11 M/E subtypes,9 neurochemical cell populations(NCs),and 20 transcriptomic cell populations(TCs)in this cortical *** analysis revealed that cells in many NCs and TCs comprised several M/E types and were difficult to clearly distinguish morpho-electrically.A similar analysis of layer V interneurons of mouse primary visual cortex(V1)and motor cortex(M1)gave results largely comparable to *** between S1,V1,and M1 suggested that,compared to V1,S1 interneurons were morpho-electrically more similar to *** study reveals the presence of substantial M/E variations in cortical interneuron populations defined by molecular expression.

关键词： Cortical interneuron Cell population Transcriptomic signature Morpho-electrical properties Correlation analysis Brain area

View suggestion for interactive segmentation of indoor scenes

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Computational Visual Media 2017年第2期3卷 131-146页

作者： Sheng Yang Jie Xu Kang Chen Hongbo fu Tsinghua University Massachusetts Institute of Technology City University of Hong Kong

Point cloud segmentation is a fundamental problem. Due to the complexity of real-world scenes and the limitations of 3D scanners, interactive segmentation is currently the only way to cope with all kinds of point clouds. However, interactively segmenting complex and large-scale scenes is very *** this paper, we present a novel interactive system for segmenting point cloud scenes. Our system automatically suggests a series of camera views, in which users can conveniently specify segmentation guidance. In this way, users may focus on specifying segmentation hints instead of manually searching for desirable views of unsegmented objects, thus significantly reducing user effort. To achieve this, we introduce a novel view preference model, which is based on a set of dedicated view attributes, with weights learned from a user study. We also introduce support relations for both graph-cut-based segmentation and finding similar objects. Our experiments show that our segmentation technique helps users quickly segment various types of scenes, outperforming alternative methods.

关键词： point cloud segmentation view suggestion interactive segmentation

ZmcrtRB3 Encodes a Carotenoid Hydroxylase that Affects the Accumulation of α-carotene in Maize Kernel

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Journal of Integrative Plant Biology 2012年第4期54卷 260-269页

作者： Yi Zhou Yingjia Han Zhigang Li Yang fu Zhiyuan fu Shutu Xu Jiansheng Li Jianbing Yan Xiaohong Yang National Maize Improvement Center Key Laboratory of Crop Genomics and Genetic ImprovementChina Agricultural University100193 BeijingChina Zhengzhou Sub-center of Chinese National Maize Improvement Center Henan Agricultural UniversityZhengzhou 450002China National Key Laboratory of Crop Improvement Huazhong Agricultural UniversityWuhan 430070China

α-carotene is one of the important components of pro-vitamin A, which is able to be converted into vitamin A in the human body. One maize （Zea mays L.） ortholog of carotenoid hydroxylases in Arabidopsis thaliana, ZmcrtRB3, was cloned and its role in carotenoid hydrolyzations was addressed. ZmcrtRB3 was mapped in a quantitative trait locus （QTL） cluster for carotenoid-related traits on chromosome 2 （bin 2.03） in a recombinant inbred line （RIL） population derived from By804 and B73. Candidate-gene association analysis identified 18 polymorphic sites in ZmcrtRB3 significantly associated with one or more carotenoid-related traits in 126 diverse yellow maize inbred lines. These results indicate that the enzyme ZmcrtRB3 plays a role in hydrolyzing both α- andβ-carotenes, while polymorphisms in ZmcrtRB3 contributed more variation in α-carotene than that inβ-carotene. Two single nucleotide polymorphisms （SNPs）, SNP1343 in 5＇untranslated region and SNP2172 in the second intron, consistently had effects on or-carotene content and composition with explained phenotypic variations ranging from 8.7% to 34.8%. There was 1.7- to 3.7-fold change between the inferior and superior hapiotype for α-carotene content and composition. Thus, SNP1343 and SNP2172 are potential polymorphic sites to develop functional markers for applying marker-assisted selection in the improvement of pro-vitamin A carotenoids in maize kernels.

关键词： α-carotene association analysis maize pro-vitamin A ZmcrtRB3.

Endpoint Prediction of EAF Based on Multiple Support Vector Machines

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Journal of Iron and Steel Research International 2007年第2期14卷 20-24,29页

作者： YUAN Ping MAO Zhi-zhong WANG fu-li Key Laboratory of Process Industry Automation of Ministry of Education Northeastern University Shenyang 110004 Liaoning China

The endpoint parameters are very important to the process of EAF steel-making, but their on-line measurement is difficult. The soft sensor technology is widely used for the prediction of endpoint parameters. Based on the analysis of the smelting process of EAF and the advantages of support vector machines, a soft sensor model for predicting the endpoint parameters was built using multiple support vector machines （MSVM）. In this model, the input space was divided by subtractive clustering and a sub-model based on LS-SVM was built in each sub-space. To decrease the correlation among the sub-models and to improve the accuracy and robustness of the model, the sub- models were combined by Principal Components Regression. The accuracy of the soft sensor model is perfectly improved. The simulation result demonstrates the practicability and efficiency of the MSVM model for the endpoint prediction of EAF.

关键词： endpoint prediction EAF soft sensor model multiple support vector machine (MSVM) principal components regression (PCR)

STUDY ON PCT CURVE FOR Zr-Ni HYDROGEN STORAGE AMORPHOUS ALLOY

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Journal of Wuhan University of Technology(Materials Science) 1999年第4期14卷 53-56页

作者： ZHANG Dongming fu Zhengyi Wuhan University of Technology Wuhan University of Technology China State Key Lab Adv. Technol. Mat. S. Wuhan University of Technology Wuhan 430070 China

Based on the comprehensive analysis of hydrogen storageexperimental results for Zr-Ni amor- phous alloy, the quantitativerelationship of PCT curve was established, the calculated results areconsistent with experimenta... 详细信息

关键词： quantitative relationship PCT curve amor phous alloy