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Numerical investigation of the interactions between a laser-generated bubble and a particle near a solid wall

Journal of Hydrodynamics 2021年第2期33卷 311-322页

作者： jian-yong Yin Yong-xue Zhang jian-jun zhu Liang Lü Shi-da Li College of Mechanical and Transportation Engineering China University of Petroleum-BeijingBeijing 102249China Beijing Key Laboratory of Process Fluid Filtration and Separation China University of Petroleum-BeijingBeijing 102249China School of International Education Hainan Medical UniversityHaikou 571199China Department of Thermal Engineering Chengde Petroleum CollegeChengde 067000China

The interactions between the bubbles and the particles near structures are important issues for the applications of the cavitation in the fluid *** study the hidden microscopic mechanisms,a numerical method for simulating the laser-generated bubble between the solid wall and a particle is developed in this paper with considerations of the viscosities and the compressibility of the gas and the liquid phases,as well as the surface tension between *** gas-liquid interface is tracked by the coupling level set and the volume of fluid(CLSVOF)*** numerical results clearly reveal that the particle can influence the cavitation bubble *** potential damage of the nearby structures is numerically quantified in terms of the wall pressure,which helps better understand the synergetic effects of the particle on the *** effects of three dimensionless parameters on the wall pressure are also investigated,especially,on the peak pressure,namely,γ1(defined as L_(1)/R_(max),where L_(1)is the distance from the center of the initial bubble to the solid wall and R_(max)is the maximum bubble radius),γ_(2)(defined as L_(2)/R_(max),where L_(2)is the distance from the lower surface of the spherical particle to the initial bubble center)andθ(defined as Rp/R_(max),where Rp is the spherical particle radius).Further numerical results show that these parameters play a dominant role in determining the peak *** y_(1)1.00,the peak pressure is caused by the shock *** the increase ofθor decrease ofγ_(2),the peak pressure ***γ_(2)>2.00,the effect of the particle on the bubble behavior can be neglected.

关键词： Cavitation bubble spherical particle coupling level set and the volume of fluid(CLSVOF) solid wall OpenFOAM

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Blast wave characteristics of multi-layer composite charge:Theoretical analysis,numerical simulation,and experimental validation

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Defence Technology（防务技术） 2023年第1期19卷 91-102页

作者： jun-bao Li Wei-bing Li Xiao-wen Hong Jia-xin Yu jian-jun zhu ZNDY of Ministerial Key Laboratory Nanjing University of Science and TechnologyNanjing210094China Inner Mongolia Metal Material Research Institute Yantai264003China China Ship Development and Design Center Wuhan 430064China

This article investigates the characteristics of shock wave overpressure generated by multi-layer composite charge under different detonation *** dimensional analysis and the explosion mechanism of the charge,a peak overpressure prediction model for the composite charge under singlepoint detonation and simultaneous detonation was *** effects of the charge structure and initiation method on the overpressure field characteristics were investigated in AUTODYN *** accuracy of the prediction model and the reliability of the numerical simulation method were subsequently verified in a series of static explosion *** results reveal that the mass of the inner charge was the key factor determining the peak overpressure of the composite charge under single-point *** peak overpressure in the radial direction improved apparently with an increase in the aspect ratio of the *** overpressure curves in the axial direction exhibited a multi-peak phenomenon,and the secondary peak overpressure even exceeded the primary peak at distances of 30D and 40D(where D is the charge diameter).The difference in peak overpressure among azimuth angles of 0-90°gradually decreased with an increase in the propagation distance of the shock *** coupled effect of the detonation energy of the inner and outer charge under simultaneous detonation improved the overpressure in both radial and axial *** difference in peak overpressure obtained from model prediction and experimental measurements was less than 16.4%.

关键词： Blast wave characteristics Multi-layer composite charge Dimensional analysis AUTODYN mapping Model Explosion experiment

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A robust statistical procedure to discover expression biomarkers using microarray genomic expression data

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2006年第8期7卷 603-607页

作者： ZOU Yang-yun YANG jian zhu jun Institute of Bioinformatics Zhejiang University Hangzhou 310029 China

Microarray has become increasingly popular biotechnology in biological and medical researches, and has been widely applied in classification of treatment subtypes using expression patterns of biomarkers. We developed a statistical procedure to identify expression biomarkers for treatment subtype classification by constructing an F-statistic based on Henderson method Ⅲ. Monte Carlo simulations were conducted to examine the robustness and efficiency of the proposed method. Simulation results showed that our method could provide satisfying power of identifying differentially expressed genes （DEGs） with false discovery rate （FDR） lower than the given type I error rate. In addition, we analyzed a leukemia dataset collected from 38 leukemia patients with 27 samples diagnosed as acute lymphoblastic leukemia （ALL） and 11 samples as acute myeloid leukemia （AML）. We compared our results with those from the methods of significance analysis of microarray （SAM） and microarray analysis of variance （MAANOVA）. Among these three methods, only expression biomarkers identified by our method can precisely identify the three human acute leukemia subtypes.

关键词： Microarray Biomarker Henderson method Ⅲ Gene expression pattern Mixed linear model

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Computed tomography-guided chemical renal sympathetic nerve modulation in the treatment of resistant hypertension: A case report

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World Journal of Clinical Cases 2021年第32期9卷 9970-9976页

作者： Ge Luo jian-jun zhu Ming Yao Ke-Yue Xie Department of Anesthesiology and Pain The Affiliated Hospital of Jiaxing UniversityJiaxing 314000Zhejiang ProvinceChina

BACKGROUND Resistant hypertension(RH)has always been a difficult problem in clinical diagnosis and *** present,there is no recognized safe and effective minimally invasive *** SUMMARY An 80-year-old woman was admitted to hospital due to trigeminal neuralgia(TN).The patient had a history of RH for more than 10 years and her blood pressure(BP)was not *** the treatment for TN,we decided to perform chemical renal sympathetic denervation with ethanol in the Pain Department of our *** year after the operation,she stopped taking antihypertensive drugs,and her BP was satisfactorily controlled within 4 years after *** Computed tomography-guided chemical renal sympathetic modulation may be a feasible method for the treatment of RH.

关键词： Resistant hypertension Renal sympathetic denervation Ethanol Case report

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Na^+ and Water Uptake in Relation to the Radial Reflection Coefficient of Root in Arrowleaf Saltbush Under Salt Stress

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Journal of Integrative Plant Biology 2007年第9期49卷 1334-1340页

作者： Xin-Fu Bai jian-jun zhu Ping Zhang Yan-Hua Wang Li-Qun Yang Lei Zhang College of Life Sciences Ludong University Yantai 264025 China

The response of halophyte arrowleaf saltbush （Atriplex triangularis Willd） plants to a gradient of salt stress were investigated with hydroponically cultured seedlings. Under salt stress, both the Na^＋ uptake into root xylem and negative pressures in xylem vessels increased with the elevation of salinity （up to 500 mol/m^3） in the root environment. However, the increment in negative pressures in root xylem far from matches the decrease in the osmotic potential of the root bathing solutions, even when the osmotic potential of xylem sap is taken into consideration. The total water potential of xylem sap in arrowleaf saltbush roots was close to the osmotic potential of root bathing solutions when the salt stress was low, but a progressively increased gap between the water potential of xylem sap and the osmotic potential of root bathing solutions was observed when the salinity in the root environment was enhanced. The maximum gap was 1.4 MPa at a salinity level of 500 mol/m^3 without apparent dehydration of the tested plants. This discrepancy could not be explained with the current theories in plant physiology. The radial reflection coefficient of root in arrowleaf saltbush decreased with the enhanced salt stress was and accompanied by an increase in the Na^＋ uptake into xylem sap. However, the relative Na^＋ in xylem exudates based on the corresponding NaCl concentration in the root bathing solutions showed a tendency of decrease. The results showed that the reduction in the radial reflection coefficient of roots in the arrowleaf saltbush did not lead to a mass influx of NaCl into xylem when the radial reflection coefficient of the root was considerably small; and that arrowleaf saltbush could use small xylem pressures to counterbalance the salt stresses, either with the uptake of large amounts of salt, or with the development of xylem pressures dangerously negative. This strategy could be one of the mechanisms behind the high resistance of arrowleaf saltbush plants to

关键词： anti-osmosis arrowleaf saltbush (Atriplex triangularis Willd) radial reflection coefficient of root salt stress xylem pressure

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Pancreatic panniculitis as the first presentation of pancreatic ductaladenocarcinoma

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Hepatobiliary & Pancreatic Diseases International 2024年第1期23卷 106-108页

作者： Wei-Fang zhu Shan Fang jian-jun Qiao Department of Dermatology the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

To the Editor:Pancreatic panniculitis,also known as pancreatic fat necrosis or enzymatic panniculitis,is a rare type of panniculitis that occurs in 0.3%−3%of patients with pancreatic disease such as acute or chronic pancreatitis and pancreatic carcinoma,especially acinar cell carcinoma[1,2].The clinical manifestations are nonspecific erythema tender nodules.

关键词： Pancreatic acute adenocarcinoma

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Experimental Study on the Sinking and Leveling of A Large-Capacity Offshore Wind Turbine Five-Bucket Foundation in Sand

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China Ocean Engineering 2024年第4期38卷 586-601页

作者： LIAN Ji-jian zhu Hang GUO Yao-hua WANG Hai-jun YU Tong-shun State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation Tianjin UniversityTianjin 300072China School of Civil Engineering Tianjin UniversityTianjin 300072China Tianjin University of Technology Tianjin 300384China College of Engineering Ocean University of ChinaQingdao 266100China

As offshore wind farms expand into deeper and farther ocean regions and the unit capacity of offshore wind turbines(OWTs)increases,there is a pressing need for a new foundation structure that can accommodate deep-sea conditions and support large capacities while maintaining economical and *** meet this goal of integrated transportation and one-step installation,a novel five-bucket jacket foundation(FBJF),with its suction installation and leveling methods in sand,has been proposed,analyzed and experimentally ***,seepage failure experiments of the FBJF at various depths were conducted,and a formula for calculating the critical suction of seepage failure suitable for the FBJF in sand was chosen and recommended for use with a range of values for the permeability coefficient ***,through leveling experiments of the FBJF at different depths,the maximum adjustable leveling angle during the sinking process was defined using seepage failure and the adjustable leveling angle of the foundation as control *** leveling control strategies were proposed and ***,an automatic sinking and leveling control system for the FBJF was developed and experimentally verified for feasibility.

关键词： offshore wind turbine(OWT) bucket foundation seepage failure suction installation

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A MOVPE method for improving InGaN growth quality by pre-introducing TMIn

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Chinese Physics B 2021年第1期30卷 551-554页

作者： Zi-Kun Cao De-Gang Zhao Jing Yang jian-jun zhu Feng Liang Zong-Shun Liu State Key Laboratory of Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

We propose a metal organic vapor phase epitaxy(MOVPE) method of pre-introducing TMIn during the growth of uGa N to improve the subsequent growth of In Ga N and discuss the impact of this method in detail. Monitoring the MOVPE by the interference curve generated by the laser incident on the film surface, we found that this method avoided the problem of the excessive In Ga N growth rate. Further x-ray diffraction(XRD), photoluminescence(PL), and atomic force microscope(AFM) tests showed that the quality of In Ga N is improved. It is inferred that by introducing TMIn in advance, the indium atom can replace the gallium atom in the reactor walls, delivery pipes, and other corners. Hence the auto-incorporation of gallium can be reduced when In Ga N is grown, so as to improve the material quality.

关键词： InGaN metal organic vapor phase epitaxy(MOVPE)

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Safety and efficacy of omalizumab for antihistamine-resistant chronic urticaria in children:a case series and literature review

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World Journal of Pediatrics 2024年第3期20卷 294-298页

作者： Wei-Fang zhu Chen Wang jian-jun Qiao Lan-Juan Li Department of Dermatology First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China State Key Laboratory for Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious DiseasesCollaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesThe First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Chronic urticaria(CU)is a common skin disease characterized by the occurrence of wheals,with or without angioedema,lasting more than 6 *** prevalence of CU is about 0.7%[1],but higher in children,with an incidence of 1.38%[1].The occurrence of severe pruritus and unpredictable wheals may severely impact patients'quality of life,cause psychological problems,including sleep disorders and depression,and lead to economic burden due to limitation on daily life and work[2,3].

关键词： edema prevalence children

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Living donor liver transplantation in 43 children with biliary atresia: a single-center experience from the mainland of China

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Hepatobiliary & Pancreatic Diseases International 2012年第3期11卷 250-255页

作者： jian-jun zhu, Qiang Xia, jian-jun Zhang, Feng Xue, Xiao-Song Chen, Qi-Gen Li and Ning XuAuthor Department of Liver Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China Department of Liver Surgery Renji Hospital Shanghai Jiaotong University School of Medicine Shanghai 200127 China

BACKGROUND: There is no large-cohort report on living donor liver transplantation (LDLT) for biliary atresia (BA) patients from the mainland of China. This single-center study describes our initial experience with 43 LDLTs for BA patients aged two years or younger. METHODS: In this study, the eligibility criteria were BA as the primary diagnosis and two years of age or younger. From October 2006 to December 2010, the clinical data of 43 LDLTs, including pre-operative evaluations, surgical techniques, postoperative complications and outcomes of donors and recipients, were retrospectively analyzed. RESULTS: Donor graft type was the left lateral segment with compatible ABO blood groups. Forty-three recipients were selected in this study. The median patient age at operation was 9 months (range 6-24), and the median body weight was 8 kg (range 5.7-12.5). Fourteen (32.6%) recipients received Kasai operations before liver transplantation. The overall one- and two-year cumulative survival rates for grafts and recipients were 81%, 81% and 76%, 76%, respectively. No donor mortality was encountered, with a minimal morbidity and no long- term sequelae. Nine out of 43 recipients died. Postoperative complications of recipients were biliary leakage and refluxing cholangitis (11/43, 25.6%), hepatic artery thrombosis (4, 9.3%), pulmonary infections (4, 9.3%), portal vein thrombosis (3, 7.0%), wound disruption (3, 7.0%), acute rejection (3, 7.0%), cytomegalovirus infection (2, 4.7%), and intra-abdominal bleeding (1, 2.3%).CONCLUSION: Despite the relatively low survival rates due to lack of experience initially, LDLT still provides encouraging outcomes for pediatric recipients with BA, even small children under two years old.

关键词： living donor liver transplantation biliary atresia children

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