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Further Extended Jacobi Elliptic Function Rational Expansion Method and New Families of Jacobi Elliptic Function Solutions to （2＋1）-Dimensional Dispersive Long Wave Equation

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Communications in Theoretical Physics 2006年第2期45卷 199-206页

作者： zhang Yuan-Yuan WANG qi zhang hong-qing Department of Applied Mathematics Dalian University of Technology Dalian 116024 China

In this paper, a further extended Jacobi elliptic function rationM expansion method is proposed for constructing new forms of exact solutions to nonlinear partial differential equations by making a more general transformation. For illustration, we apply the method to （2＋1）-dimensionM dispersive long wave equation and successfully obtain many new doubly periodic solutions. When the modulus m→1, these sohitions degenerate as soliton solutions. The method can be also applied to other nonlinear partial differential equations.

关键词： doubly periodic solution soliton solution (2+1)-dimensional dispersive long wave equation

Negatons, Positons, and Complexiton Solutions of Higher Order for a Non-isospectral KdV Equation

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Communications in Theoretical Physics 2007年第3X期48卷 411-414页

作者： zhang Yuan-Yuan WANG qi zhang hong-qing Department of Applied Mathematics Dalian University of Technology Dalian 116024 China

In this paper, negatons, positons, and complexiton solutions of higher order for a non-isospectral KdV equation, the KdV equation with loss and non-uniformity terms are obtained through the bilinear Baicklund transfor... 详细信息

关键词： bilinear Backlund transformation negatons positons complexiton solutions

Formation of the CME Leading Edge Observed in the 2003 February 18 Event

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Chinese Journal of Astronomy and Astrophysics 2006年第6期6卷 741-750页

作者： Xing-Ming Bao hong-qi zhang Jun Lin National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 National Astronomical Observatories / Yunnan Observatory Chinese Academy of Sciences Kunming 650011 Harvard-Smithsonian Center for Astrophysics 60 Garden Street Cambridge MA 02138 USA

This work investigates a typical coronal mass ejection （CME） observed on 2003 February 18, by various space and ground instruments, in white light, Ha, EUV and X- ray. The Ha and EUV images indicate that the CME started with the eruption of a long filament located near the solar northwest limb. The white light coronal images show that the CME initiated with the rarefaction of a region above the solar limb and followed by the formation of a bright arcade at the boundary of the rarefying region at height 0.46 Re above the solar surface. The rarefying process synchronized with the slow rising phase of the eruptive filament, and the CME leading edge was observed to form as the latter started to accelerate. The lower part of the filament brightened in Ha as the filament rose to a certain height and parts of the filament was visible in the GOES X-ray images during the rise. These brightenings imply that the filament may be heated by the magnetic reconnection below the filament in the early stage of the eruption. We suggest that a possible mechanism which leads to the formation of the CME leading edge and cavity is the magnetic reconnection which takes place below the filament after the filament has reached a certain height.

关键词： Sun coronal mass ejections (CMEs) - Sun filaments - Sun flares

A Highly Selective Fluorescent Chemosensor for Cu2＋

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Chemical Research in Chinese Universities 2015年第3期31卷 347-351页

作者： GUAN Jie zhang Peng WEI Taibao LIN qi YAO hong zhang Youming Key Laboratory of Eco-environment-related Polymer Materials Ministry of Education Key Laboratory of Polymer Materials of Gansu Province College of Chemistry and Chemical EngineeringNorthwest Normal University Lanzhou 730070 P.R.China

A new Zn2＋ probe L2-Zn（L2=naphthofuran carbonylhydrazone derivant） was synthesized as a fluores- cence chemosensor for Cu2＋, by which Cuz＋ ion could be detected with high selectivity and sensitivity in a wide pH range via a displacement ＂turn-off＂ signaling strategy. Whereas the coordination between Zn2＋ and L2 resulted in a considerable enhancement of typical luminescence of a naphthalofuran group in complex L2-Zn, the addition of Cu2＋ ion led to a dramatic decrease in the emission intensity of probe L2-Zn at about 503 nm（excitation at 423 nm）. The competitive fluorescent experiments showed that other metal ions, such as Hgz＋, Fe3＋, Ag＋, Ca2＋, Co2＋, Ni2＋, Cd2＋, Pb2＋, Zn2＋, Cr3＋ and Mg2＋ could not impact tile detection of Cu2＋. The detection limit of the novel probe L2-Zn for Cu2~ ion was as low as 2.3× 10 7 mol/L, which is far lower than the guideline value of 1.6× 10-5 mol/L of the United States Environmental Protection Agency.

关键词： Znic complex Fluorescent switch Copper ion Turn-off signal

Combined treatment of landfill leachate with fecal supernatant in sequencing batch reactor

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2006年第5期7卷 397-403页

作者： ZHOU Shao-qi zhang hong-guo SHI Yong School of Environmental Science and Engineering South China University of Technology Guangzhou 510641 China

A laboratory-scale sequencing batch reactor (SBR) is used to treat landfill leachate containing high concentration of ammonium nitrogen with municipal fecal supernatant. The SBR system is operated in the following sequential phases: fill period, anoxic period, aeration period, settling period, decant and idle period. The results indicated that the average removal efficiencies of COD, BOD5, TN, NH 4+-N were 93.76%, 98.28%, 84.74% and 99.21%, respectively. The average sludge removal loading rates of COD, BOD5, TN and NH 4+-N were 0.24 kg/(kg SS?d), 0.08 kg/(kg SS?d), 0.04 kg/(kg SS?d) and 0.036 kg/(kg SS?d), respectively. Highly effective simultaneous nitrification and denitrification was achieved in the SBR system. The ratio of nitrification and denitrification was 99% and 84%, respectively. There was partial NO?2 denitrification in the system.

关键词： Sequencing batch reactor (SBR) Leachate Fecal supematant Simultaneous nitrification Denitrification

Tripartite intensive intervention for prevention of rebleeding in elderly patients with hypertensive cerebral hemorrhage

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World Journal of Clinical Cases 2021年第33期9卷 10106-10115页

作者： Cai-Xia Li Li Li Jin-Feng zhang qi-hong zhang Xiao-hong Jin Guo-Juan Cai Department of Critical Care Affiliated Hangzhou First People’s HospitalZhejiang University School of MedicineHangzhou 310000Zhejiang ProvinceChina Department of Emergency Zhuji People’s Hospital of Zhejiang ProvinceZhuji 311800Zhejiang ProvinceChina

BACKGROUND Hypertensive cerebral hemorrhage(HICH)is the rupture and bleeding of vessels of the cerebral parenchyma caused by continuously elevated or violently fluctuating blood *** condition is characterized by high disability and high *** formation and resulting space-occupying effects following intracerebral hemorrhage are among the key causes of impaired neurological function and ***,minimally invasive clearance of the hematoma is undertaken for the treatment of HICH because it can effectively relieve intracranial ***,special attention should be given to the quality of medical and nursing interventions in the convalescent period after minimally invasive hematoma *** The study aim was to determine the value of intensive intervention,including doctors,nurses,and patient families,for the prevention of rebleeding in elderly patients with HICH during the first hospitalization for rehabilitation after the ictal event METHODS A total of 150 elderly HICH patients with minimally invasive hematoma evacuation in our hospital between May 2018 and May 2020 were selected and equally divided into two groups of 75 each by their planned *** control group was given conventional nursing intervention and the observation group was given tripartite intensive *** length of hospital stay,cost,complication rate,satisfaction rate,and rebleeding rate during hospitalization were *** in cerebral blood flow indicators were recorded in both *** in the National Institutes of Health Stroke Scale(NIHSS)score,quality of life index(QLI)score,and health behavior score were evaluated at the National Institutes of *** Duration of hospitalization was shorter in the in the observation group than in the control group,the hospitalization cost was less than in the control group,and the rate of rebleeding during hospitalization was lower than in the control group(all P<0.05)

关键词： Tripartite intensive intervention by doctors Nurses and patient families Hypertensive intracerebral hemorrhage Rebleeding Rehabilitation Nerve function

Modeling of kinetic characteristics of alkaline-surfactant-polymer-strengthened foams decay under ultrasonic standing wave

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Petroleum Science 2022年第4期19卷 1825-1839页

作者： Zhi-Hua Wang Xiao-Yu Liu hong-qi zhang Yong Wang Yun-Fei Xu Bao-Liang Peng Yang Liu Key Laboratory for Enhanced Oil&Gas Recovery of the Ministry of Education Northeast Petroleum UniversityDaqingHeilongjiang163318China Oil Recovery Plant No.3 PetroChina Daqing Oilfield Company LimitedDaqingHeilongjiang163113China Research Institute of Petroleum Exploration and Development PetroChinaBeijing100083China

Foaming issues are encountered at the stages in crude oil production, transportation, processing, especially in chemical flooding enhanced oil recovery(EOR) oilfields. These accumulated foams would cause a lot of trouble for downstream operation. The destruction of foams under ultrasonic has been increasingly paying attention in the background of green oilfield development. This study focuses on the decay kinetic characteristics of alkaline-surfactant-polymer-strengthened foams under the ultrasonic standing *** performance of the diverse foams was characterized. A decay kinetic model incorporating the energy correlation was developed and validated. The factors that affect the decay kinetic characteristics were discussed. The results indicated that the collapse rate and the collapse volume fraction decreased when the foam size decreased, the gas-liquid ratio decreased and the surface tension increased. Ultrasonic standing wave parameters have a significant impact on the decay behavior of the foam. Both the ultrasonic frequency and ultrasonic amplitude were increased by 50%, the collapse volume fraction of foams increased by about 1.25 times in the identical irradiation time. The relative deviation between the measured results and the model prediction was less than 10%. The potential collapse mechanism was also explained using the principle of energy correlation of foam surface. This study is not only beneficial to provide a robust and rigorous way to defoam of produced liquid in the alkaline/surfactant/polymer(ASP)flooding EOR process but also meaningful to well understand the decay process of oil-based foams.

关键词： Foaming performance Energy correlation model Decay kinetic Collapse mechanism ASP flooding Ultrasonic standing wave

Superpenumbral chromospheric flare

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Research in Astronomy and Astrophysics 2018年第10期18卷 131-140页

作者： Suo Liu hong-qi zhang Debiprasad P.Choudhary Abhishek K.Srivastava Bhola Nath Dwivedi National Astronomical Observatories Chinese Academy of Sciences Department of Physics and Astronomy California State University Department of Physics Indian Institute of Technology (BHU)

We observed a C-class flare at the outer boundary of the superpenumbra of a sunspot. The flare was triggered by an emerging magnetic bipolar region that was obliquely oriented with respect to the superpenumbral fibrils. The flare started due to the low height magnetic reconnection of emerging magnetic flux with a superpenumbral field resulting in hot multi-temperature plasma flows in the inverse Evershed flow channel and its overlying atmosphere. Inverse Evershed flows in the chromosphere start from the superpenumbra towards the sunspot that end at the outer boundary of the penumbra. The hot plasma flow towards the sunspot in the inverse Evershed channels show about 10 km s^-1 higher velocity in Ha wavelengths compared to the plasma emissions at various temperatures as seen in different AIA filters. Even though these velocities are about seven times higher than the typical inverse Evershed flow speeds, the flow is diminished at the outer boundary of the sunspot＇s penumbra. This suggests that the superpenumbral field lines that carry inverse Evershed flows are discontinued at the boundary where the penumbral field lines dive into the sun and these two sets of field lines are completely distinct. The discontinuity in the typical magnetic field and plasma properties at the adjoining of these two sets of field lines further leads to discontinuity in the characteristic magnetoacoustic and Alfvrn speeds, thereby stopping the plasma flows further on. The multi-temperature plasma in the inverse Evershed channels exhibits possible longitudinal oscillations initially during the onset of the flare, and later flows towards the sunspot. In the multi-temperature view, the different layers above the flare region have a mixture of supersonic as well as subsonic flows.

关键词： magnetic field solar flare trigger magnetic emergence

Collagen-chitosan scaffold impregnated with bone marrow mesenchymal stem cells for treatment of traumatic brain injury

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Neural Regeneration Research 2019年第10期14卷 1780-1786页

作者： Feng Yan Ming Li hong-qi zhang Gui-Lin Li Yang Hua Ying Shen Xun-Ming Ji Chuan-Jie Wu hong An Ming Ren Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijingChina China-America Institute of Neuroscience Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Ultrasound Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Traditional Chinese Medicine Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Neurology Xuanwu HospitalCapital Medical UniversityBeijingChina

Combinations of biomaterials and cells can effectively target delivery of cells or other therapeutic factors to the brain to rebuild damaged nerve pathways after brain *** collagen-chitosan scaffolds were prepared by a freeze-drying method based on brain tissue *** scaffolds were impregnated with rat bone marrow mesenchymal stem cells.A traumatic brain injury rat model was established using the 300 g weight free fall impact *** marrow mesenchymal stem cells/collagen-chitosan scaffolds were implanted into the injured *** neurological severity scores were used to assess the recovery of neurological *** Morris water maze was employed to determine spatial learning and memory ***-eosin staining was performed to measure pathological changes in brain *** was performed for vascular endothelial growth factor and for 5-bromo-2-deoxyuridine(BrdU)/neuron specific enolase and BrdU/glial fibrillary acidic *** results demonstrated that the transplantation of bone marrow mesenchymal stem cells and collagen-chitosan scaffolds to traumatic brain injury rats remarkably reduced modified neurological severity scores,shortened the average latency of the Morris water maze,increased the number of platform crossings,diminished the degeneration of damaged brain tissue,and increased the positive reaction of vascular endothelial growth factor in the transplantation and surrounding *** 14 days after transplantation,increased BrdU/glial fibrillary acidic protein expression and decreased BrdU/neuron specific enolase expression were observed in bone marrow mesenchymal stem cells in the injured *** therapeutic effect of bone marrow mesenchymal stem cells and collagen-chitosan scaffolds was superior to stereotactic injection of bone marrow mesenchymal stem cells *** test the biocompatibility and immunogenicity of bone marrow mesenchymal stem cells and collagen-chitosan scaffolds,immunos

关键词： nerve regeneration stem cells collagen chitosan scaffolds traumatic brain injury bone marrow mesenchymal stem cells brain tissue engineering neural regeneration