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Simulation of gas-solid flow in sinter vertical cooling furnace

Journal of Iron and Steel Research International 2023年第11期30卷 2133-2142页

作者： Teng-fei Qi Hai-feng Li jun-jie sun Guo-jun Chen Yong-jie Zhang School of Metallurgy Northeastern UniversityShenyang110819LiaoningChina Key Laboratory for Ecological Metallurgy of Multi-Metallic Mineral(Ministry of Education) Northeastern UniversityShenyang110819LiaoningChina Technology Center Shanghai Meishan Iron and Steel Co.Ltd.Nanjing210039JiangsuChina Central Research Institute Baosteel Co.Ltd.Shanghai201900China

The velocity distribution of sinter and gas in vertical cooling furnace(VCF)has an important influence on gas-solid heat *** on the slot model of single hopper in the VCF of Meishan Iron and Steel Co.,Ltd.,the velocity and particle size distribution of sinter and the velocity and pressure distribution of gas were studied using a computational fluid dynamics-discrete element method model to obtain the gas-solid flow rule in the *** results showed that the velocity of sinter near the wall and the edge of vent cowl was lower than that in the rest of the same ***,the rectangular section of the vertical cooling furnace can be divided into a quasi-static zone,a plug flow zone and a convergent flow zone according to the flow velocity of the *** average particle size and the void fraction of sinter bed were distributed in"W"and"V"shape along the width direction,*** distribution of gas velocity in the furnace cavity was uneven,and the high-velocity area gradually changed from the center to the edge of the furnace cavity with the rise of *** the ratio of edge to center gas flow from 2.7∶1 to 0.7∶1 could improve the gas velocity,but could not change the gas velocity *** gas velocity distribution was more affected by the average particle size distribution of the sinter *** was suggested that measures need be taken to adjust it to improve the gas velocity distribution in the VCF.

关键词： Sinter Vertical cooling furnace Average particle size Void fraction Velocity distribution Gas distribution mode

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Penile metastasis from rectal carcinoma: A case report

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World Journal of Clinical Cases 2022年第19期10卷 6609-6616页

作者： jun-jie sun Shi-Yu Zhang jun-jie Tian Bai-Ye Jin Department of Urology The First Affiliated HospitalZhejiang University School of MedicineHangzhou 311000Zhejiang ProvinceChina

BACKGROUND Metastasis to the penis is an unusual event,and penile metastasis from rectal carcinoma(PMRC)is extremely rare and associated with a dismal *** far,approximately 80 cases have been *** SUMMARY Herein,we report the case of a 49-year-old man with *** patient presented to the urology clinic with a complaint of penile pain during *** patient underwent the Dixon operation for rectal carcinoma 2 mo before the *** hospitalisation,abdominal computed tomography revealed a nodular lesion on the left *** postoperative pathological examination revealed a typical intestinal-type *** cases of PMRC were retrieved from PubMed to characterise the clinicopathological features and identify the prognostic factors of *** The analysis suggested that approximately 24 mo is the median time to metastasis occurrence and 150 d is the survival time after ***,poor pathological differentiation,lymph node involvement of the primary RC,metastasis time1 cm,and treatment abandonment are negative predictors of survival *** follow-up,surgical resection,chemotherapy,and radiotherapy may potentially improve the prognosis of patients.

关键词： Rectal carcinoma Penile metastasis Risk factors Prognosis Case report

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NOVA1 promotes SMN2 exon 7 splicing by binding the UCAC motif and increases SMN protein expression

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Neural Regeneration Research 2022年第11期17卷 2530-2536页

作者： Li-Li Du jun-jie sun Zhi-Heng Chen Yi-Xiang Shao Liu-Cheng Wu Institute of Comparative Medicine Nantong UniversityNantongJiangsu ProvinceChina Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education Co-Innovation Center of NeuroregenerationNantong UniversityNantongJiangsu ProvinceChina Laboratory Animal Center Nanjing University of Chinese MedicineNanjingJiangsu ProvinceChina Institute of Neuroscience Soochow UniversitySuzhouJiangsu ProvinceChina

Spinal muscular atrophy(SMA)is a rare hereditary neuromuscular disease with a high lethality rate in *** in the homologous genes survival of motor neuron(SMN)1 and SMN2 have been reported to be SMA pathogenic *** studies showed that a highinclusion rate of SMN2 exon 7 increased SMN expression,which in turn reduced the severity of *** inclusion rate of SMN2 exon 7 was higher in neural tissues than in non-neural ***-oncological ventral antigen(NOVA)is a splicing factor that is specifically and highly expressed in *** plays a key role in nervous system development and in the induction of nervous system *** r,it remains unclear whether this splicing factor affects *** this study,we analyzed the inclusion of SMN2 exon 7 in different tissues in a mouse model of SMA(genotype smn^(-/-)SMN2^(2 tg/0))and litter mate controls(genotype smn^(+/-)SMN2^(2 tg/0)).We found that inclusion level of SMN2 exon 7 was high in the brain and spinal co rd tissue,and that NOVA1 was also highly expressed in nervous system *** addition,SMN2 exon 7 and NOVA1 were expressed synchronously in the central nervous *** further investigated the effects of NOVA1 on disease and found that the number of neurons in the anterior horn of spinal cord decreased in the mouse model of SMA during postnatal days 1-7,and that NOVA1 expression levels in motor neurons decreased simultaneously as spinal muscular atrophy *** also found that in vitro expression of NOVA1 increased the inclusion of SMN2 exon 7 and expression ofthe SMN2 protein in the U87 MG cell line,whereas the opposite was observed when NOVA1 was knocked ***,point mutation and RNA pull-down showed that the UCAC motif in SMN2 exon 7 plays a critical role in NOVA1 binding and promoting the inclusion of exon *** r,CA was more essential for the inclusion of exon 7 than the order of Y residues in the ***,these findings indicate that NOVA1 intera

关键词： exon 7 inclusion motor neuron neuro-oncological ventral antigen 1 SMN2 splicing spinal cord spinal muscular atrophy splicing factors UCAC motif

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Changes in sensorimotor regions of the cerebral cortex in congenital amusia:a case-control study

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Neural Regeneration Research 2021年第3期16卷 531-536页

作者： jun-jie sun Xue-Qun Pan Ru Yang Zhi-Shuai Jin Yi-Hui Li jun Liu Da-Xing Wu Department of Radiology the Second Xiangya Hospital of Central South UniversityChangshaHunan ProvinceChina Department of Radiology the Affiliated Zhuzhou Hospital of Xiangya College of MedicineCentral South UniversityZhuzhouHunan ProvinceChina Lister Hill National Center for Biomedical Communication National Library of MedicineBethesdaMDUSA Medical Psychological Center the Second Xiangya Hospital of Central South UniversityChangshaHunan ProvinceChina

Perceiving pitch is a central function of the human auditory system;congenital amusia is a disorder of pitch *** underlying neural mechanisms of congenital amusia have been actively ***,little attention has been paid to the changes in the motor rain within congenital *** this case-control study,17 participants with congenital amusia and 14 healthy controls underwent functional magnetic resonance imaging while resting with their eyes closed.A voxel-based degree centrality method was used to identify abnormal functional network centrality by comparing degree centrality values between the congenital amusia group and the healthy control *** found decreased degree centrality values in the right primary sensorimotor areas in participants with congenital amusia relative to controls,indicating potentially decreased centrality of the corresponding brain regions in the auditory-sensory motor feedback *** found a significant positive correlation between the degree centrality values and the Montreal Battery of Evaluation of Amusia *** conclusion,our study identified novel,hitherto undiscussed candidate brain regions that may partly contribute to or be modulated by congenital *** evidence supports the view that sensorimotor coupling plays an important role in memory and musical *** study was approved by the Ethics Committee of the Second Xiangya Hospital,Central South University,China(***20180101GZ01)on February 9,2019.

关键词： congenital amusia degree centrality lifelong impairment local functional connectivity music discrimination primary motor area primary sensorimotor area primary sensory area resting-state functional magnetic resonance imaging voxel-based analysis

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An approach for determination of lateral limit angle in kinematic planar sliding analysis for rock slopes

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1305-1314页

作者： Xiaojuan Yang jie Hu Honglei sun jun Zheng College of Civil Engineering Zhejiang University of TechnologyHangzhou310023China Department of Civil Engineering Zhejiang UniversityHangzhou310058China Center for Balance Architecture Zhejiang UniversityHangzhou310007China The Architectural Design & Research Institute of Zhejiang University Co. Ltd.Hangzhou310063China

Planar sliding is one of the frequently observed types of failure in rock *** analysis is a classic and widely used method to examine the potential failure modes in rock *** accuracy of planar sliding kinematic analysis is significantly influenced by the value assigned to the lateral limit angleγ***,the assignment ofγlim is currently used generally based on an empirical *** study aims to propose an approach for determining the value ofγlim in deterministic and probabilistic kinematic planar sliding analysis.A new perspective is presented to reveal thatγlim essentially influences the probability of forming a potential planar sliding *** procedure to calculate this probability is introduced using the block theory *** is found that the probability is correlated with the number of discontinuity sets presented in rock ***,different values ofγlim for rock masses with different sets of discontinuities are recommended in both probabilistic and deterministic planar sliding kinematic analyses;whereas a fixed value ofγlim is commonly assigned to different types of rock masses in traditional ***,an engineering case was used to compare the proposed and traditional kinematic analysis *** error rates of the traditional method vary from 45%to 119%,while that of the proposed method ranges between 1%and 17%.Therefore,it is likely that the proposed method is superior to the traditional one.

关键词： Kinematic analysis Block theory Planar sliding Lateral limit angle Rock slope

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Definition of Raceway Boundary Using Fractal Theory

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Journal of Iron and Steel Research International 2015年第1期22卷 36-41页

作者： jun-jie sun Zhi-guo LUO Zhan-xia DI Tao ZHANG Heng ZHOU Zong-shu ZOU School of Materials Science and Metallurgy Northeastern University Anhui University of Technology

The particle velocity contours were obtained by tracking the tracer particles in the raceway region of the COREX melter gasifier model and the contours were irregular. According to the fractal theory, the fractal dimen sions of different particle velocity contours were determined. Through the analysis of the fractal dimensions, a new method for precise determination of the raceway boundary was proposed. The results show that, when the velocity is less than 0.18 m/s, the particles are located in the stagnant zone and the fractal dimensions of particle velocity con- tours are almost constant as 1.41; when the velocity increases from 0.18 to 0.83 m/s, the particles are located in the rapid movement zone and the fractal dimensions decrease gradually from 1.41 to 1.05 ＇when the velocity is grea- ter than 0.83 m/s, the particles are located in the cavity zone and the fractal dimensions are again almost constant as approaching to 1.00. Therefore, the velocity contour of 0.18 m/s, which is critical to distinguish the rapid move- ment zone and stagnant zone, can be used to define the raceway boundary. Based on this method, the effect of blo wing rate on raceway size was calculated and the results show that the penetration depth and height of the raceway increase with the increase of blowing rate.

关键词： raceway boundary physical simulation particle velocity contour fractal

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Clinical features and an atypical WT1 mutant site in a child with incomplete Denys-Drash syndrome

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Asian Journal of Andrology 2014年第4期16卷 647-649页

作者： Hai-Yan Wang Zhi-Hui Yue Liang-Zhong sun Jia-Cong Mo Ying Mo jun-jie sun Department of Pediatrics The First Affiliated Hospital Department of Pediatrics Sun Yat-sen Memorial Hospital Department of Pediatric Surgery The First Affiliated Hospital Sun Yat-sen University Guangzhou China.

Dear Editor, Denys-Drash syndrome （DDS） is characterized by the triad of progressive nephropathy, urogenital malformation and Wilms＇ tumor. Incomplete variants present with nephropathy with either intersex disorders or Wilms＇ tumor.1 Most DDS patients carry WTI mutations in exon 8 or 9.1 Here, we report an incomplete DDS child who carried a novel WT1 missense mutation in exon 6 and had unique clinical manifestations.

关键词： GENOTYPE/PHENOTYPE CORRELATIONS AMBIGUOUS GENITALIA MUTATION PATIENT GENE

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Gas film/regenerative composite cooling characteristics of the liquid oxygen/liquid methane (LOX/LCH4) rocket engine

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第8期25卷 631-649页

作者： Xinlin LIU jun sun Zhuohang JIANG Qinglian LI Peng CHENG jie SONG Science and Technology on Scramjet Laboratory College of Aerospace Science and EngineeringNational University of Defense TechnologyChangsha 410073China

The thermal protection of rocket engines is a crucial aspect of rocket engine *** this paper,the gas film/regenerative composite cooling of the liquid oxygen/liquid methane(LOX/LCH4)rocket engine thrust chamber was investigated.A gas film/regenerative composite cooling model was developed based on the Grisson gas film cooling efficiency formula and the one-dimensional regenerative cooling *** accuracy of the model was validated through experiments conducted on a 6 kg/s level gas film/regenerative composite cooling thrust ***,key parameters related to heat transfer performance were *** results demonstrate that the model is sufficiently accurate to be used as a preliminary design *** temperature rise error of the coolant,when compared with the experimental results,was found to be less than 10%.Although the pressure drop error is relatively large,the calculated results still provide valuable guidance for heat transfer *** addition,the performance of composite cooling is observed to be superior to regenerative *** the gas film flow rate results in higher cooling efficiency and a lower gas-side wall ***,the position at which the gas film is introduced greatly impacts the cooling *** optimal introduction position for the gas film is determined when the film is introduced from a single row of *** optimal introduction position results in a more uniform wall temperature distribution and reduces the peak ***,it is observed that a double row of holes,when compared to a single row of holes,enhances the cooling effect in the superposition area of the gas film and further lowers the gas-side wall *** results provide a basis for the design of gas film/regenerative composite cooling systems.

关键词： Liquid oxygen/liquid methane(LOX/LCH4)rocket engine Gas film cooling Regenerative cooling Heat transfer characteristics

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Four-birds-with-one-stone:A multifunctional Ti-based material for solar-driven water evaporation

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Nano Research 2024年第5期17卷 4498-4506页

作者： Yannan Li Yaning sun Dan Zhang Yu Xue jie Wang Nan Zhang jun Wang Jiangwei Zhang Yan Zhao jun-jie Liu School of Physical Science and Technology College of Energy Materials and ChemistryInner Mongolia UniversityHohhot 010021China

Sustainable,environmentally friendly and low-energy desalination materials have important research value for the increasing demand of freshwater year by ***,it is a huge challenge to maintain high heat energy transfer efficiency without reducing the heat conversion capacity of specific solar photothermal conversion ***,their efficiency and durability are greatly limited by the problems of seawater corrosion,oil,and bacteria *** now,no related work has been reported to solve all the aforementioned problems via a simple four-birds-with-one-stone ***,a class of multifunctional porous photothermal silver(Ag)modified Ti foams(Tf-TA/Ag series materials)is prepared for the development of advanced solar water evaporation devices,and provides alternative materials for alleviating freshwater crisis and treating *** oil contact angle(OCA)changes from 41°to 180°,which significantly reduces the adhesion of *** addition,Tf-TA2/Ag sample also shows an excellent and sustained antibacterial effect,which maintains above 99.9%of antibacterial rate after repeated 5 *** surface temperature of the Tf-TA2/Ag sample reaches 52.5℃ after simulated sun irradiation for 20 min,which is significantly higher than that of the contact groups(water:36.4℃,Ti foam:38.2℃ and Tf-TA2:40.9℃).The capacity of seawater evaporation and salt removal is enhanced due to the excellent photothermal properties,low reflectance,and uniform heat dissipation *** water production efficiency of Tf-TA2/Ag sample is 1.41 kg·m^(-2)·h^(-1) in artificial seawater and 0.76 kg·m^(-2)·h^(-1) in oily sewage under simulated sun ***,the hydrophilic and oleophobic properties of Tf-TA2/Ag are critical to extracting water from oil/water mixture in diverse water ***,this four-birds-with-one-stone approach provides a new perspective for the improvement of solar seawater desalination performance.

关键词： four-birds-with-one-stone photothermal material antibacterial material antifouling property

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Synthesis of LDHs and Rheological Properties of Laponite/LDHs Dispersions

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Chinese Chemical Letters 2003年第9期14卷 973-976页

作者： Pei Zhi GUO, De jun sun, jie ZHANGKey Laboratory for Colloid & Interface Chemistry of Education Ministry, Shandong University, Jinan 250100 Key Lab. Colloid/Interface Chem. E. Shandong University Jinan 250100 China

The chemical composition, morphology of the particles of positively charged layered doubl?hydroxides (LDHs) were studied by ICP, Mastersizer, TEM. The preliminary results indicated that with adding LDHs to 1% laponite dispersion the yield stress of laponite/LDHs mixed dispersions increased at first, then decreased dramatically to a minimum, and the yield stress rose again when LDHs increased further.

关键词： Laponite layered double hydroxide rheological properties.

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