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THEORETICAL AND EXPERIMENTAL STUDIES OF HYDRAULIC CHARACTERISTICS OF DISCHARGE TUNNEL WITH VORTEX DROP

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Journal of Hydrodynamics 2010年第4期22卷 582-589页

作者： CHEN Hua-yong XU Wei-lin DENG jun NIU Zhi-pan LIU Shan-jun WANG Wei State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University Chengdu 610065 China

The velocities at given points in the volute chamber,the contracted section and the vertical dropshaft of a discharge tunnel with vortex drop were measured by a small specially designed L-shaped tube,as Laser Doppler Velocimetry（LDV） or Particle Image Velocimetry（PIV） would not work there due to the special structure of the discharge tunnel with vortex *** empirical formulas were proposed to predict the velocities and the angles of the velocities made with the vertical direction θ.The theoretical analysis results were in good agreement with experimental ***,the method proposed in this paper can be used to analyze related characteristics of discharge tunnels with vortex ***,different model scales were considered to predict the cavitation characteristics on the wall of a dropshaft in practical engineering.

关键词： discharge tunnel with vortex drop dropshaft velocity wall pressure cavitation

Cloud Base Height and Effective Cloud Emissivity Retrieval with Ground-Based Infrared Interferometer

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Atmospheric and Oceanic Science Letters 2012年第5期5卷 439-444页

作者： pan Lin-jun LU Da-Ren Laboratory for Middle Atmosphere and Global Environment Observation (LAGEO) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Based on ground-based Atmospheric Emitted Radiance Interferometer (AERI) observations in Shouxian, Anhui province, China, the authors retrieve the cloud base height (CBH) and effective cloud emissivity by using the minimum root-mean-square difference method. This method was originally developed for satellite remote sensing. The high-temporal-resolution retrieval results can depict the trivial variations of the zenith clouds continu-ously. The retrieval results are evaluated by comparing them with observations by the cloud radar. The comparison shows that the retrieval bias is smaller for the middle and low cloud, especially for the opaque cloud. When two layers of clouds exist, the retrieval results reflect the weighting radiative contribution of the multi-layer cloud. The retrieval accuracy is affected by uncertainties of the AERI radiances and sounding profiles, in which the role of uncertainty in the temperature profile is dominant.

关键词： AERI cloud base'height effective cloudemissivity W-band ARM cloud radar

Immunoglobulin G4-related kidney disease involving the renal pelvis and perirenal fat:A case report

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World Journal of Clinical Cases 2022年第8期10卷 2510-2515页

作者： jun-Wei He Qian-Ming Zou jun pan Shu-Sheng Wang Song-Tao Xiang Department of Urology the Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510000Guangdong ProvinceChina

BACKGROUND Immunoglobulin(Ig)G4-related disease(Ig G4-RD)is an autoimmune disease associated with chronic and progressive inflammation and *** is difficult to differentiate Ig G4-RD involving the kidney from infectious diseases and malignancy on *** SUMMARY We report the case of a 51-year-old Chinese man whose abdominal computed tomography scan showed diffuse bilateral enlargement of the kidneys and perirenal fat,thickening of the renal pelvic walls,and hydronephrosis of the right *** laboratory test results showed a serum creatinine level of 464μmol/*** patient was diagnosed with acute renal failure and was started on intermittent *** tests revealed high serum Ig G4 levels(20.8 g/L)and an enlarged right submaxillary lymph *** and histopathological examination of the enlarged node led to the diagnosis of Ig *** corticosteroid therapy,his serum creatinine level quickly decreased to near normal *** Ig G4-RD affecting the renal pelvis or perirenal fat is rare,with atypical imaging *** consultation is critical for accurate diagnosis and treatment of this *** cases should undergo biopsy to avoid misdiagnosis.

关键词： Immunoglobulin G4-related disease Renal pelvic Perirenal fat Case report

Simple synthesis of a porous Sb/Sb2O3 nanocomposite for a high-capacity anode material in Na-ion batteries

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Nano Research 2017年第5期10卷 1794-1803页

作者： jun pan Nana Wang Yanli Zhou Xianfeng Yang Wenyao Zhou Yitai Qian Jian Yang Key Laboratory of Colloid and Interface Chemistry Ministry University Jinan 250100 China of Education School of Chemistry and Chemical Engineering Shandong Analytical and Testing Center South China University of Technology Guangzhou 510640 China Jinan Licheng No.2 High School Jinan 250105 China Department of Chemistry Hefei National Laboratory for Physical Sciences at Microscale University of Science and Technology of China Hefei 230026 China

High-capacity anode materials are highly desirable for sodium ion batteries. Here, a porous Sb/Sb2O3 nanocomposite is successfully synthesized by the mild oxidization of Sb nanocrystals in air. In the composite, Sb contributes good conductivity and Sb2O3 improves cycling stability, particularly within the voltage window of 0.02-1.5 V. It remains at a reversible capacity of 540 mAh-g-1 after 180 cycles at 0.66 A-g-1. Even at 10 A-g-1, the reversible capacity is still preserved at 412 mAh·g-1, equivalent to 71.6% of that at 0.066 A.g-L These results are much better than Sb nanocrystals with a similar size and structure. Expanding the voltage window to 0.02-2.5 V includes the conversion reaction between Sb203 and Sb into the discharge/charge profiles. This would induce a large volume change and high structure strain、stress, deteriorating the cycling stability. The identification of a proper voltage window for Sb/Sb2O3 paves the way for its development in sodium ion batteries.

关键词： Sb/Sb2O3 high-capacity anode material sodium ion batteries

Mixed-mode fracture behavior in deep shale reservoirs under different loading rates and temperatures

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Petroleum Science 2023年第5期20卷 3037-3047页

作者： Yu Suo Yan-Jie Zhao Xiao-Fei Fu Wen-Yuan He Zhe-jun pan School of Petroleum Engineering Northeast Petroleum UniversityDaqing163318HeilongjiangChina Postdoctoral Resource Center Daqing Oilfield Company LimitedDaqing163458HeilongjiangChina Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development(Northeast Petroleum University) Ministry of EducationDaqing163318HeilongjiangChina Heilongjiang Province Key Laboratory of Oil and Gas Reservoir Fracturing and Evaluation Daqing163318HeilongjiangChina PetroChina International Exploration and Development Company Limited Corporation Beijing100034China

In the last years,shale gas has gradually substituted oil and coal as the main sources of energy in the *** with shallow shale gas reservoirs,deep shale is characterized by low permeability,low porosity,strong heterogeneity,and strong *** the process of multi-cluster fracturing of horizontal wells,the whole deformation process and destruction modes are significantly influenced by loading *** this investigation,the servo press was used to carry out semi-circular bend(SCB)mixedmode fracture experiments in deep shales(130,160,190℃)with prefabricated fractures under different loading rates(0.02,0.05,0.1,0.2 mm/min).The fracture propagation process was monitored using acoustic *** deformation characteristics,displacementeload curve,and acoustic emission parameters of shale under different loading rates were studied during the mixed-mode fracture *** results showed that during the deformation and fracture of the specimen,the acoustic emission energy and charge significantly increased near the stress peak,showing at this point the most intense acoustic emission *** the increase in loading rate,the fracture peak load of the deep shale specimen also ***,the maximum displacement decreased to different *** the increase in temperature,the effective fracture toughness of the deep shale gradually ***,the maximum displacement *** different loading rates,the deformation of the prefabricated cracks showed a nonlinear slow growthelinear growth *** slope of the linear growth stage increased with the increase in loading *** addition,as the loading rate increased,an increase in tension failure and a decrease in shear failure were ***,the control chart showing the relationship between tension and the shear failure under different temperatures and loading rates was determined.

关键词： Deep shale Mixed-mode fracture toughness Loading rate Deformation characteristics

Selective Dealkenylative Functionalization of Styrenes via C-C Bond Cleavage

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Research 2020年第1期2020卷 1420-1428页

作者： Jianzhong Liu jun pan Xiao Luo Xu Qiu Cheng Zhang Ning Jiao State Key Laboratory of Natural and Biomimetic Drugs Peking University100191 BeijingChina State Key Laboratory of Organometallic Chemistry Chinese Academy of SciencesShanghai 200032China

As a readily available feedstock,styrene with about 25 million tons of global annual production serves as an important building block and organic synthon for the synthesis of fine chemicals,polystyrene plastics,and ***,in the past decades,many direct transformations of this costless styrene feedstock were disclosed for the preparation of high-value chemicals,which to date,generally performed on the functionalization of styrenes through the allylic C-H bond,C(sp2)-H bond,or the C=C double bond ***,the dealkenylative functionalization of styrenes via the direct C-C single bond cleavage is so far challenging and still ***,we report the novel and efficient C-C amination and hydroxylation reactions of styrenes for the synthesis of valuable aryl amines and phenols via the site-selective C(Ar)-C(alkenyl)single bond *** chemistry unlocks the new transformation and application of the styrene feedstock and provides an efficient protocol for the late-stage modification of substituted styrenes with the site-directed dealkenylative amination and hydroxylation.

关键词： styrene cleavage synthesis

Clustering of K-band selected local galaxies

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Research in Astronomy and Astrophysics 2009年第9期9卷 979-992页

作者： Bin Ma Ke-Lai Meng jun pan Jia-Sheng Huang Long-Long Feng Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 China Harvard-Smithsonian Center for Astrophysics 60 Garden Street Cambridge MA 02138 USA Department of Physics Texas A＆M University College Station TX 77843 USA

We present a detailed clustering analysis of a large K-band selected local galaxy sample, which is constructed from the 2MASS and the SDSS and consists of 82486 galaxies with 10 〈 K 〈 13.5 and 0.01 〈 z 〈 0.1. The two-point correlation function of the magnitude-limited sample in real space at small scales is well described by the power law ∈（r） = （r/6.44 ± 0.23）^-1.81±0.02. The pairwise velocity dispersion is derived from the anisotropic two-point correlation function and we find the dispersion δ12 = 685 ± 17 kms^-1 if scale invariance is assumed, which is larger than values measured in the optical bands of the selected galaxy samples. We further investigate the dependence of the two-point correlation function and the δ12 on the g- r color and the K- band luminosity, and obtain similar results to previous works in optical bands. Comparing a mock galaxy sample with our real data indicates that the semi-analytical model cannot mimic the δ12 in observation, although it can approximate the two-point correlation function within measurement uncertainties.

关键词： galaxies: statistics -- infrared: galaxies -- cosmology: large-scale structureof universe

Effect of down-regulation of voltage-gated sodium channel Nav1.7 on activation of astrocytes and microglia in DRG in rats with cancer pain

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Asian Pacific Journal of Tropical Medicine 2015年第5期8卷 405-411页

作者： jun pan Xiang-Jin Lin Zhi-Heng Ling You-Zhi Cai Department of Orthopaedics the First Affiliated Hospital of Medical School of Zhejiang University

Objective:To evaluate the effect of down-regulation of Nav1.7 on the activation of astrocytes and microglia in DRG of rats with cancer pain,and explore the transmission of the nociceptive ***:Lentiviral vector harboring RNAi sequence targeting the Navl.7 gene was constructed,and Walker 256 breast cancer cell and morphine was injected to build the bone cancer pain model and morphine tolerance model in *** vector was *** in each model were divided into 4 groups:model group,PBS group,vehicle group and LV-Nav1.7 *** expression levels of GFAP and OX42 in dorsal root ganglia(DRG) were ***:After the animal model was built,the level of Navl.7,GFAP and OX42 was improved obviously with the time prolonged,which was statistically significant(P<0.05).The expression level of GFAP and OX42 in the DRG in the LV-Navl.7 group declined obviously compared to the model group,PBS group and vehicle group(P<0.05).Conclusions:Intrathecal injection of Navl.7 shRNA lentiviral vector can reduce the expression of Nav1.7and inhibit the activation of astrocytes and microglia in *** effort is also effective in morphine tolerance bone cancer pain model rats.

关键词： Nav1.7 Bone cancer pain Morphine tolerance

Universality Class in Abelian Sandpile Models with Stochastic Toppling Rules

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Communications in Theoretical Physics 2005年第3X期44卷 483-486页

作者： pan Gui-jun ZHANG Duan-Ming SUN Hong-Zhang YIN Yan-Ping Department of Physics Huazhong University of Science and Technology Wuhan 430074 China Department of Physics Hubei University Wuhan 430062 China

We present a stochastic critical slope sandpile model, where the amount of grains that fall in an overturning event is stochastic variable. The model is local, conservative, and Abelian. We apply the moment analysis to evaluate critical exponents and finite size scaling method to consistently test the obtained results. Numerical results show that this model, Oslo model, and one-dimensional Abelian Manna model have the same critical behavior although the three models have different stochastic toppling rules, which provides evidences suggesting that Abelian sandpile models with different stochastic toppling rules are in the same universality class.

关键词： self-organized criticality sandpile model universality class