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Analysis of the buoyancy-induced heat transferin a rotating cavity

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航空动力学报 2012年第3期27卷 566-571页

作者： Tian, Shu-Qing xue, hang Gao, Chao Li, Ying Technology Department Aviation Industry Corporation of China Commercial Aircraft Engine Company Limited Shanghai 200241 China Institute of Steam and Gas Turbines Rheinisch-Westfaelische Technische Aachen University Germany Civil Aircraft Marketing and Sales Aviation Industry Corporation of China International Holding Corporation Beijing 100101 China School of Jet Propulsion Beijing University of Aeronautics and Astronautics Beijing 100191 China Hekou Oil Production Plant of Shengli Oilfield Sinopec Group Shandong Dongying 257200 China

In order to get a better knowledge of the heat transfer in compressor cavities of aero-engines,the simplified rotating cavity with two-plane discs,a shaft and a cylindrical rim has been investigated numerically and compared with the available *** numerical results in agreement with the available experiments show large-scale *** disk local Nusselt numbers show mainly radial rising distributions for the heated disks with radial rising temperature *** the present work,at the Reynolds number of 20 000,the disk local Nusselt numbers are the correlations of the local Grashof number to the power of 1.89-2.6,and the value of the power is increased as the rotational Reynolds number goes *** the rotational Reynolds number of 800 000,the local Nusselt numbers are the correlations of the local Grashof number to the power of 0.68-2.6,and the value of the power is decreased as Reynolds number goes *** area-averaged disk Nusselt number is the correlation of the Reynolds number to the power of 0.479 and the rotational Grashof number to the power of 0.12.

关键词： buoyancy force Coriolis force rotating cavity heat transfer turbine

Study on Direct Reduction Characteristics of Iron Ore Coal Mixed Pellets

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Journal of Iron and Steel Research International 2000年第2期7卷 6-10页

作者： xue Zheng-hang YOU Jin-zhou ZHOU Guo-fan Central Iron&Steel Research Institute University of Science and Technology Wuhan

In order to get DRI iron ore coal mixed pellets are reduced isothermally. The mechanisms of reduction desulphurization, iron oxide reduction and the structure regenesis of the coal mixed pellets during reduction have been studied. The effect of various processing factors on the quality of DRI and economy technological indices including compression strength, desulphurization rate, recovery rate, reaction fraction, carbon content and metallization are also researched.

关键词： iron ore coal mixed pellet DRI reduction desulphurization

Cerebral infarct secondary to traumatic internal carotid artery dissection

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World Journal of Clinical Cases 2020年第20期8卷 4773-4784页

作者： Guang-Ming Wang hang xue Zhen-Jie Guo Jin-Lu Yu Department of Neurosurgery The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina

BACKGROUND Traumatic internal carotid artery dissection(TICAD)is rare and can result in severe neurological disability and even *** consensus regarding its diagnostic screening and management has been *** To investigate the clinical presentation,imaging features,diagnostic workup,and treatment of *** In this retrospective case series,emergency admissions for TICAD due to closed head injury were *** demographic,clinical,and radiographic data were retrieved from patient charts and the picture archiving and communication *** Six patients(five males and one female,age range of 43-62 years,mean age of 52.67 years)presented with *** accidents(4/6)were the most frequent cause of *** clinical presentation was always related to brain *** examination revealed dissection of the affected artery and corresponding brain *** the patients were definitively diagnosed with *** patient was treated conservatively,one patient underwent anticoagulant therapy,two patients were given both antiplatelet and anticoagulant drugs,and two patients underwent decompressive *** patient fully recovered,while three patients were disabled at *** patients died of refractory brain *** TICAD can cause catastrophic outcomes and even refractory brain *** and efficient diagnosis of TICAD is essential for initiating appropriate *** treatment of TICAD is challenging and variable and is based on clinician discretion on a case-by-case basis.

关键词： Internal carotid artery dissection Brain infarction Treatment Prognosis

Brief inhalation of sevoflurane can reduce glial scar formation after hypoxic-ischemic brain injury in neonatal rats

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维普期刊数据库

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Neural Regeneration Research 2021年第6期16卷 1052-1061页

作者： Qiu-Shi Gao Ya-Han Zhang hang xue Zi-Yi Wu Chang Li Ping Zhao Department of Anesthesiology Shengjing Hospital of China Medical UniversityShenyangLiaoning ProvinceChina

Previous studies have demonstrated that sevoflurane postconditioning can provide neuroprotection after hypoxic-ischemic injury and improve learning and memory function in developing rodent *** classical Rice-Vannucci model was used to induce hypoxic-ischemic injury,and newborn(postnatal day 7)rats were treated with 2.4%sevoflurane for 30 minutes after hypoxic-ischemic *** results showed that sevoflurane postconditioning significantly improved the learning and memory function of rats,decreased astrogliosis and glial scar formation,increased numbers of dendritic spines,and protected the histomorphology of the ***,sevoflurane postconditioning decreased expression of von Hippel-Lindau of hypoxia-inducible factor-1α and increased expression of *** of 1.52μg of the hypoxia-inducible factor-1αinhibitor YC-1(Lificiguat)into the left lateral ventricle 30 minutes before hypoxic-ischemic injury reversed the neuroprotection induced by *** finding suggests that sevoflurane can effectively alleviate astrogliosis in the hippocampus and reduce learning and memory impairments caused by glial scar formation after hypoxic-ischemic *** underlying mechanism may be related to upregulated DJ-1 expression,reduced ubiquitination of hypoxia-inducible factor-1α,and stabilized hypoxiainducible factor-1α*** study was approved by the Laboratory Animal Care Committee of China Medical University,China(approval No.2016PS337K)on November 9,2016.

关键词： brain injury brain central nervous system in vivo injury model plasticity rat recovery regeneration repair

Review of Sc microalloying effects in Al-Cu alloys

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 1098-1114页

作者： Shenghua Wu Chong Yang Peng Zhang hang xue Yihan Gao Yuqing Wang Ruihong Wang Jinyu Zhang Gang Liu Jun Sun State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048China School of Aerospace Engineering North University of ChinaTaiyuan 030051China

Artificially controlling the solid-state precipitation in aluminum (Al) alloys is an efficient way to achieve well-performed properties,and the microalloying strategy is the most frequently adopted method for such a *** this paper,recent advances in lengthscale-dependent scandium (Sc) microalloying effects in Al-Cu model alloys are *** coarse-grained Al-Cu alloys,the Sc-aided Cu/Sc/vacancies complexes that act as heterogeneous nuclei and Sc segregation at the θ′-Al_(2)Cu/matrix interface that reduces interfacial energy contribute significantly to θ′*** grain size refinement to the fine/ultrafine-grained scale,the strongly bonded Cu/Sc/vacancies complexes inhibit Cu and vacancy diffusing toward grain boundaries,promoting the desired intragranular θ′*** nanocrystalline scale,the applied high strain producing high-density vacancies results in the formation of a large quantity of (Cu Sc,vacancy)-rich atomic complexes with high thermal stability,outstandingly improving the strength/ductility synergy and preventing the intractable low-temperature *** review recommends the use of microalloying technology to modify the precipitation behaviors toward better combined mechanical properties and thermal stability in Al alloys.

关键词： aluminum alloy microalloying effect length-scale dependence precipitation mechanical properties

FeNi Prussian blue analogues on highly graphitized carbon nanosheets as efficient glucose sensors

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Rare Metals 2024年第6期43卷 2730-2738页

作者： Jin-hang xue Qiu-Hong Sun Cheng Han Yuan-Dong Yang Shao-Jie Xu Qi-Peng Li Jin-Jie Qian College of Life and Environmental Science Wenzhou UniversityWenzhou 325000China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325000China College of Chemistry and Chemical Engineering Zhaotong UniversityZhaotong 657000China

Meeting the continuous glucose monitoring requirements of individuals necessitates the research and development of sensors with high sensitivity and *** this study,a straightforward strategy was proposed for synthesizing ultra-thin oxygen-rich graphitized carbon nanosheets(denoted as GCS-O).These nanosheets are obtained by calcining a topologically two-dimensional indium-based coordination ***,the growth of FeNi Prussian blue analogue(PBA)on GCS-O effectively introduces active sites and increases the nitrogen content within the carbonaceous *** resulting FeNi-PBA/GCS-O composite exhibits excellent glucose sensing performance with a broad linear range of 1 to 1300μmol·L^(-1).Meanwhile,it also achieves a high sensitivity of 2496μA·mmol^(-1)·L·cm^(-2),a limit of detection of 100nmol·L^(-1)(S/N=3),and commendable long-term *** relatively simple synthesis process,exceptional sensitivity,and satisfactory electrochemical sensing performance of FeNi-PBA/GCS-O open up new directions for biosensor applications.

关键词： Coordination polymer Carbon nanosheet Prussian blue analogue Surface reconstruction Glucose oxidation

Comparison between the interannual and decadal components of the Silk Road pattern

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Atmospheric and Oceanic Science Letters 2018年第3期11卷 270-274页

作者： HONG Xiao-Wei xue Shu-hang LU Ri-Yu LIU Yu-Yun Climate Change Research Center Chinese Academy of Sciences College of Atmospheric Science Nanjing University of Information Science & Technology State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of Sciences College of Earth Sciences University of the Chinese Academy of Sciences Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of Sciences

The Silk Road pattern（SRP）, which is a teleconnection pattern along the Asian upper-tropospheric westerly jet in summer, exhibits both interannual and decadal variabilities. Through the nineyear Gaussian filtering method and regression analyses, this study compares the interannual and decadal components of the SRP. The results indicate that the interannual SRP corresponds to a well-organized wave train of alternate cyclonic and anticyclonic anomalies across the Eurasian continent along the Asian westerly jet, resulting in a similar wave-like pattern of cold and warm surface temperature anomalies. This pattern of temperature anomalies differs from that associated with the original SRP, which is characterized by warmer or cooler temperatures mainly over Europe–West Asia and Northeast Asia, depending on the phase of the SRP. On the other hand, the decadal SRP shows a similar pattern to the interannual one from Europe to Central Asia, but the meridional wind anomalies tend to be weak over East Asia. These circulation anomalies are responsible for the significant temperature anomalies over Europe–West Asia and Northeast Asia but weak anomalies between these two domains.

关键词： Silk Road pattern interannual variability decadal variation temperature

Activation of CFTR-mediated Cl^- Transport by Capsaicinoids in Cell Culture Model

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Chemical Research in Chinese Universities 2009年第2期25卷 220-223页

作者： ZHAO xue-hang HOU Tmg-ting GE Hong SUN Juan-juan YANG Hong MA Tong-hui Membrane Channel Research Laboratory Northeast Normal University Changchun 130024 P. R. China Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery School of Life Sciences Liaoning Normal University Dalian 116029 P. R. China

Previous studies reported that capsaicin potentiates AF508 mutant cystic fibrosis transmembrane conductance regulator（CFTR） channel gating defect by transfected cell-based assays. It has been postulated that orally ingested capsaicin may conceptually be used to develop a therapeutic strategy to treat gastrointestinal disorders in CF patients. We tried to reproduce and extend those pre-clinical data of previous studies. Cell-based fluorescence func- tional measurements in Fischer thyroid epithelial cells（FRT） expressing CFTR showed no effect of capsaicin on potentiating AF508-CFTR, while genistein showed a strongly positive activity. Studies show that capsaicin and dihy- drocapsaicin activated cAMP-prestimulated wild-type CFTR in a dose-dependent manner with a maximal response of 70% of that activated by genistein, thus gave an apparent EC50 of （40.4±6.8）μmol/L and （150.2±7.4） μtmol/L respectively. Preliminary study shows that the binding sites for capsaicin and dihydrocapsaicin may be probably partially overlapped with that for genistein because the maximal activation of wild-type CFTR with genistein is partially blocked by caosaicin and dihydrocapsaicin.

关键词： Capsaicinoid Cystic fibrosis transmembrane conductance regulator(CFTR) Activation

Dental focal infection-induced ventricular and spinal canal empyema: A case report

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World Journal of Clinical Cases 2020年第14期8卷 3114-3121页

作者： hang xue Xiao-Hui Wang Lin Shi Qiang Wei Yi-Ming Zhang Hong-Fa Yang Department of Neurotraumatic Surgery The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Neurosurgery The Affiliated Hospital of Changchun University of Traditional Chinese MedicineChangchun 130021Jilin ProvinceChina Department of Neurosurgery Dong’e Hospital Affiliated to Shandong First Medical UniversityDong’e 252200Shandong ProvinceChina

BACKGROUND Dental focal infection-induced ventricular and spinal canal empyema is an extremely rare,severe,acute disease that is clinically associated with extremely high morbidity and *** cerebrospinal fluid(CSF)bacterial culture is time-consuming,with a low positive rate,which frequently results in severe irreversible *** next-generation sequencing technique is an emerging pathogenic microorganism detection method that can obtain results in a short time with high accuracy,thus providing great assistance in the clinical diagnosis and treatment of this *** SUMMARY This paper reports a rare case of dental focal infection-induced ventricular and spinal canal *** the course of treatment at a local hospital,the patient had negative results from repeated CSF bacterial cultures and was empirically given vancomycin *** transfer to our hospital,the nextgeneration sequencing technique was adopted to determine that the pathogenic microorganisms were multiple anaerobic infectious bacteria derived from the oral *** antibiotic therapeutic scheme was adjusted in a timely manner,and the ventricular and spinal canal inflammation was also ***,the antibiotics that had been applied at the local hospital were not able to cover all pathogenic microorganisms,which resulted in irreversible injury to the brain stem,finally leading to patient *** Dental focal infection-induced ventricular and spinal canal empyema is an extremely rare,severe,acute disease with high morbidity and *** delay in diagnosis and treatment will result in irreversible *** early application of the next-generation sequencing technique can obtain results in a short time and clarify a *** antibiotic treatment combined with suitable surgical intervention is the key to managing this disease.

关键词： Ventricular empyema Next-generation sequencing Dental focal infection Antibiotics Surgery Case report