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An Objective Identification Method for Wintertime Cold Fronts in Eurasia

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Advances in Atmospheric Sciences 2021年第10期38卷 1695-1705页

作者： Mengru feng Yujing qin Chuhan LU Key Laboratory of Meteorological Disaster Ministry of Education/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjing 210044China

The present study identifies wintertime cold fronts in Eurasia from gridded datasets using a new objective two-step identification *** simple and classic conception of a front is adopted,where a cold front is identified as the warm boundary of the frontal zone with a suitable horizontal temperature gradient and cold *** combine the traditional thermal front parameter with temperature advection to first identify the cold frontal zone,and then its eastern and southern boundaries are objectively plotted as a cold front in *** comparing different cold front identification methods,the results from this two-step cold front identification method and subjective analysis are more consistent,and the positions of the cold front identified with our method are more *** objective technique is also applied to a nationwide cold wave event over *** show that the horizontal extent and movement of the cold front are in good agreement with the related circulation and the associated cold *** proposed method and results in this study may shed light on the rapid identification of cold fronts in operational weather analysis and facilitate further research on the long-term activity characteristics of continental cold fronts.

关键词： cold front thermal front parameter objective identification Eurasia winter

Effects and mechanisms of acupuncture on women related health

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Frontiers of Medicine 2024年第1期18卷 46-67页

作者： Huichao qin Jiaxing feng Xiaoke Wu Department of Reproductive Medicine Heilongjiang Provincial HospitalHarbin Institute of TechnologyHarbin150036China Department of Obstetrics and Gynecology First Affiliated HospitalHeilongjiang University of Chinese MedicineHarbin150040China

Globally,public health interventions have resulted in a 30-year increase in women’s life ***,women’s health has not increased when socioeconomic status is ***’s health has become a major public health concern,for those women from developing countries are still struggling with infectious and labor-related diseases,and their counterparts in developed countries are suffering from physical and psychological *** recent years,complementary and alternative medicine has attracted wide attentions with regards to maintaining women’s ***,a crucial component of traditional Chinese medicine,has been used to treat many obstetric and gynecological diseases for thousands of years due to its analgesic and anti-inflammatory effects and its effects on stimulating the sympathetic/parasympathetic nervous *** fully understand the mechanism through which acupuncture exerts its effects in these diseases would significantly extend the list of available interventions and would allow for more reasonable advice to be given to general ***,by searching PubMed and CNKI regarding the use of acupuncture in treating obstetric and gynecological diseases,we aimed to summarize the proven evidence of using acupuncture in maintaining women’s health by considering both its effectiveness and the underlying mechanisms behind its effects.

关键词： acupuncture women health clinical efficacy mechanism

Dynamical Behavior of SEIR-SVS Epidemic Models with Nonlinear Incidence and Vaccination

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Acta Mathematicae Applicatae Sinica 2022年第2期38卷 282-303页

作者： Xiao-mei feng Li-li LIU feng-qin ZHANG School of Mathematics and Informational Technology Yuncheng UniversityYuncheng 044000China School of Mathematics and Informational Sciences Shaanxi Normal UniversityXi'an 710062China Complex Systems Research Center Shanxi UniversityTaiyuan 030006China Shanxi Key Laboratory of Mathematical Techniques and Big Data Analysis on Disease Control and Prevention Shanxi UniversityTaiyuan 030006China

For some infectious diseases such as mumps,HBV,there is evidence showing that vaccinated individuals always lose their immunity at different rates depending on the inoculation *** this paper,we propose an age-structured epidemic model using a step function to describe the rate at which vaccinated individuals lose immunity and reduce the age-structured epidemic model to the delay differential *** the age-structured model,we consider the positivity,boundedness,and compactness of the semiflow and study global stability of equilibria by constructing appropriate Lyapunov ***,for the reduced delay differential equation model,we study the existence of the endemic equilibrium and prove the global stability of ***,some numerical simulations are provided to support our theoretical results and a brief discussion is given.

关键词： vaccination age-structured epidemic model delay differential equation model stability Lyapunov functional

Special Issue on Future Digital Design and Manufacturing:Embracing Industry 4.0 and Beyond-Part Ⅱ

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Chinese Journal of Mechanical Engineering 2017年第5期30卷 1045-1046页

作者： Sheng-feng qin Kai Cheng School of Design Northumbria University College of Engineering Design and Physical SciencesBrunel University London

Digital design and manufacturing have been under pinned by digital modeling, simulation, and automation controls for decades. Under the new market requirement of mass customized products and services, the advancements in artificial intelligence （AI）, smart technology, virtual reality （VR）, big data, digital twin, robotics and human-centered design are becoming driving forces for the development of future digital design and manufacturing. This special issue focuses on the future digital design and manufacturing especially under the Industry 4.0 framework and beyond. This editorial introduces the papers in this special issue, which linked to the International Workshop on Digital Design and Manufacturing Technologies - Embracing Industry 4.0 and Beyond at Northumbria University in Newcastle, UK, held on 12-13 April 2016. In the Part I of the issue [1], there are 13 papers published in 2016, Vol- ume 29, No 6 of the Chinese Journal of Mechanical Engineering （this journal）.

关键词： Design In Special Issue on Future Digital Design and Manufacturing:Embracing Industry 4.0 and Beyond-Part

Metal hydride work pair development and its application on automobile air conditioning systems

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第2期8卷 197-204页

作者： qin feng CHEN Jiang-ping ZHANG Wen-feng CHEN Zhi-jiu Institute of Refrigeration and Cryogenic Engineering Shanghai Jiao Tong University Shanghai 200030 China Research Center Zhejiang Yinlun Machinery Co. Ltd. Tiantai 317200 China

Aiming at developing exhaust gas driving automobile air conditioning systems, a hydride pair LaNi4.61Mn0.26A10.13/ La0.6Y0.4Ni4.8Mn0.2 was developed working at 393-473 K/293-323 K/263-273 K. Property tests showed that both alloys have flat plateau slopes and small hystereses; system theoretical coefficient of performance （COP） is 0.711. Based on this work pair, a function proving automobile metal hydride refrigeration system was constructed. The equivalent thermal conductivities of the activated reaction beds were merely 1.1-1.6 W/（m-K）, which had not met practical requirement. Intermittent refrigeration cycles were achieved and the average cooling power was 84.6 W at 423 K/303 K/273 K with COP being 0.26. By altering cycling parameters, experiment data showed that cooling power and system COP increase with the growth of heat source temperature as well as pre-heating and regeneration time while decrease with heat sink temperature increment. This study confirms the feasibility of automobile metal hydride refrigeration systems, while heat transfer properties of reaction beds still need to be improved for better performance.

关键词： Metal hydride Air conditioning Reaction bed Automobile Coefficient of performance (COP)

Quantification of electron accumulation at grain boundaries in perovskite polycrystalline films by correlative infrared-spectroscopic nanoimaging and Kelvin probe force microscopy

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Light(Science & Applications) 2021年第5期10卷 890-897页

作者： Ting-Xiao qin En-Ming you Mao-Xin Zhang Peng Zheng Xiao-feng Huang Song-Yuan Ding Bing-Wei Mao Zhong-Qun Tian State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamenChina School of Aerospace Engineering Xiamen UniversityXiamenChina

Organic–inorganic halide perovskites are emerging materials for photovoltaic applications with certified power conversion efficiencies(PCEs)over 25%.Generally,the microstructures of the perovskite materials are critical to the performances of ***,the role of the nanometer-sized grain boundaries(GBs)that universally existing in polycrystalline perovskite films could be benign or detrimental to solar cell performance,still remains ***,nanometer-resolved quantification of charge carrier distribution to elucidate the role of GBs is highly ***,we employ correlative infrared-spectroscopic nanoimaging by the scattering-type scanning near-field optical microscopy with 20 nm spatial resolution and Kelvin probe force microscopy to quantify the density of electrons accumulated at the GBs in perovskite polycrystalline thin *** is found that the electron accumulations are enhanced at the GBs and the electron density is increased from 6×10^(19) cm^(−3 )in the dark to 8×10^(19) cm^(−3 ) under 10 min illumination with 532 nm *** results reveal that the electron accumulations are enhanced at the GBs especially under light illumination,featuring downward band bending toward the GBs,which would assist in electron-hole separation and thus be benign to the solar cell performance.

关键词： illumination polycrystalline grain

Gluon saturation and baryon stopping in the SPS, RHIC, and LHC energy regions

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Chinese Physics C 2012年第2期36卷 136-141页

作者： LI Shuang feng Sheng-qin College of Science China Three Gorges UniversityYichang 443002China Key Laboratory of Quark and Lepton Physics(Huazhong Normal University) Ministry of EducationWuhan 430079China School of Physics and Technology Wuhan UniversityWuhan 430072China

A new geometrical scaling method with a gluon saturation rapidity limit is proposed to study the gluon saturation feature of the central rapidity region of relativistic nuclear collisions. The net-baryon number is essentially transported by valence quarks that probe the saturation regime in the target by multiple scattering. We take advantage of the gluon saturation model with geometric scaling of the rapidity limit to investigate net baryon distributions, nuclear stopping power and gluon saturation features in the SPS and RHIC energy regions. Predictions for net-baryon rapidity distributions, mean rapidity loss and gluon saturation feature in central Pb＋Pb collisions at the LHC are made in this paper.

关键词： gluon saturation geometrical scaling net-baryon distributions

Syntheses and Crystal Structures of Co(Ⅱ)Complexes with 5-Tert-butyl Isophthalic Acid

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Chinese Journal of Structural Chemistry 2010年第7期29卷 1108-1114页

作者： qin Jian-Hua JU feng-Yang College of Chemistry and Chemical Engineering Luoyang Normal University Luoyang 471022 China

Two new Co（ Ⅱ） coordination polymers {[Co（Htbip）2（H2O）4]·（H2O）}n 1 and {[Co2（tbip）2Copa）1.5]（H2tbip）}n 2 （H2tbip = 5-tert-butyl isophtha]ic acid, bpa = 1,2-dis（4-pyri- dyl）ethane） have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectroscopy and X-ray diffraction. Compound 1 exhibits a water-bridged 1-D linear chain which is extended by hydrogen bonds into a 3D supramolecular network, while compound 2 has a dinuclear unit extended by bpa ligand to form a 2-D layer.

关键词： Co(Ⅱ) complex 5-tert-butyl isophthalic acid crystal structure

Hyperprolactinemia due to pituitary metastasis: A case report

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World Journal of Clinical Cases 2021年第1期9卷 190-196页

作者： Chun-Yang Liu Yu-Bo Wang Hui-qin Zhu Jin-Liang you Zhuang Liu Xian-feng Zhang Department of Neurosurgery First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Respiratory medicine First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Neurosurgery Linyi Cancer HospitalLinyi 276000Shandong ProvinceChina

BACKGROUND Pituitary metastasis is an uncommon manifestation of systemic malignant ***,hyperprolactinemia and overall hypopituitarism caused by metastatic spread leading to the initial symptoms are *** SUMMARY A 53-year-old male patient was admitted to our hospital with complaints of bilateral blurred vision,dizziness,polyuria,nocturia,severe fatigue and somnolence,decreased libido,and intermittent nausea and vomiting for more than 6 *** the last 7 d,the dizziness had *** investigations revealed overall hypofunction of the pituitary gland,but the patient had an elevated serum prolactin level(703.35 mg/mL).Preoperative magnetic resonance imaging revealed a tumor in the sellar region,accompanied by intratumoral hemorrhage and ***,transnasal subtotal resection of the lesion in the sellar region was *** histopathological and immunohistochemical examinations of the resected lesion revealed metastasis of lung adenocarcinoma to the pituitary *** hydrocortisone(30 mg/d)and levothyroxine(25 mg/d)were given both pre-and ***,the clinical symptoms were significantly ***,4 mo following the surgery,the patient succumbed due to multiple organ *** Hyperprolactinemia is one of the markers of poor prognosis in patients with carcinoma that metastasizes to the pituitary *** hormone supplementation plays a positive role in relieving the symptoms of patients and improving quality of life.

关键词： Hyperprolactinemia Neoplasm metastasis Pituitary neoplasms Diagnosis Treatment Case report