In this paper,we analyze the modification of fast particles on the nonlinear radial displacement of m=1 internal kink mode with a shoulderlike equilibrium current *** the matching method on the solutions of the outer...
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In this paper,we analyze the modification of fast particles on the nonlinear radial displacement of m=1 internal kink mode with a shoulderlike equilibrium current *** the matching method on the solutions of the outer and inner regions,we derive the analytical form of nonlinear radial displacement in the limit of q'=q"=0,which is valid to the cases of weak shear due to a slight flattening of the q(r)profile around q=*** have taken into consideration the effects of the circulating and trapped fast particles on the nonlinear state of the *** is found that a fast particle can modify the nonlinear saturation level by the change of potential energy,depending on the fast particle *** the matching of linear dispersion relation to early nonlinear result,we also obtain the relations of radial displacement to the mode frequency and linear growth rate,and discuss the scaling for different stabilities of the MHD modes.
Municipal solid waste landfills emit nitrous oxide (N2O) gas. Assuming that the soil cover is the primary N2O source from landfills, this study tested, during a four-year project, the hypothesis that the proper use ...
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Municipal solid waste landfills emit nitrous oxide (N2O) gas. Assuming that the soil cover is the primary N2O source from landfills, this study tested, during a four-year project, the hypothesis that the proper use of chosen soils with fine texture minimizes N2O emissions. A full-scale sanitary landfill, a full-scale bioreactor landfill and a cell planted with Nerium indicum or Festuca arundinacea Schreb, at the Hangzhou Tianziling landfill in Hangzhou City were the test sites. The N2O emission rates from all test sites were considerably lower than those reported in the published reports. Specifically, the N2O emission rate was dependent on soil water content and nitrate concentrations in the cover soil. The effects of leachate recirculation and irrigation were minimal. Properly chosen cover soils applied to the landfills reduced N2O flux.
A physicochemical method was used to adsorb glycerin in saline wastewater by strong base anion resin(D201).Boric acid,a kind of weak acid,can combine with glycerin,and a specific complex can be produced,which possess ...
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A physicochemical method was used to adsorb glycerin in saline wastewater by strong base anion resin(D201).Boric acid,a kind of weak acid,can combine with glycerin,and a specific complex can be produced,which possess bigger molecule than ***,this specific complex could be adsorbed by strong base anion *** the experiment,the equation of adsorption isotherm with D201 at 20℃ can be shown by lgx/m=1.74lgCe–5.72;for column test with simulative glycerin wastewater,the treatment capability was more than nine bed volumes,and 39.77 mg glycerin could be removed by per gram *** the NaCl concentration was 10 g/L,five bed volumes of simulative wastewater could be treated,and the adsorb mass was 29.09 mg/*** the NaCl concentration was 30 g/L,only three bed volumes of simulative wastewater could be treated,and the adsorb mass was 14.83 mg/g.
Four weeks of uncertain stress was used to establish an animal model of chronic stress. Basic fibroblast growth factor was injected daily for 15 days following stress induction. Cell morphology in the hippocampal CA3 ...
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Four weeks of uncertain stress was used to establish an animal model of chronic stress. Basic fibroblast growth factor was injected daily for 15 days following stress induction. Cell morphology in the hippocampal CA3 region of chronic stress mice revealed cell damage. Nitric oxide content and calcium concentration were significantly increased in the hippocampus, and learning and memory functions were significantly decreased. After basic fibroblast growth factor intervention, Ca2~ overload was decreased and neuronal damage was relieved in hippocampal neurons, which improved learning and memory functions in chronic stress mice. Latency was prolonged and the number of errors was decreased in a passive avoidance test.
Landfill is the major disposal route of municipal solid waste(MSW) in most Asian countries. Leachate from landfill presents a strong wastewater that needs intensive treatment before discharge. Direct recycling was p...
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Landfill is the major disposal route of municipal solid waste(MSW) in most Asian countries. Leachate from landfill presents a strong wastewater that needs intensive treatment before discharge. Direct recycling was proposed as an effective alternative for leachate treatment by taking the landfill as a bioreactor. This process was proved not only considerably reducing the pollution potential of leachate, but also enhancing organic degradation in the landfill. However, as this paper shows, although direct leachate recycling was effective in landfilled MSW with low food waste fraction (3.5%, w/w), it failed in MSW containing 54% food waste, as normally noted in Asian countries. The initial acid stuck would inhibit methanogenesis to build up, hence strong leachate was yielded from landfill to threaten the quality of receiving water body. We demonstrated the feasibility to use an assisted bioreactor landfill, with a well-decomposed refuse layer as ex-situ anaerobic digester to reducing COD loading in leachate. By doing so, the refuse in simulated landfill column (2.3 m high) could be stabilized in 30 weeks while the COD in leachate reduced by 95%(61000 mg/L to 3000 mg/L). Meanwhile, the biogas production was considerably enhanced, signaling by the much greater amount and much higher methane content in the biogas.
Prediction of methane emissions at the stage of longwall planning constitutes the basis for the determination of the appropriate method and parameters of ventilation and selection of prevention means including the met...
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Prediction of methane emissions at the stage of longwall planning constitutes the basis for the determination of the appropriate method and parameters of ventilation and selection of prevention means including the methane drainage technol- ogy. The growth of methane saturation of coal seams with the extraction depth, with simultaneously increasing output concen- tration, contributes to the increase of the quantity of methane emitted into longwall areas. The subject matter of the article has been directed at the predicted quantity of methane emissions into planned longwalls with roof caving in the layer of seams adjacent to the roof of large thickness. The performed prognostic calculations of methane emissions into the longwall working were referred to two sources, i.e. methane liberated during coal mining by means of a cutter-loader and methane originating from the degasification of the floor layer destressed by the longwall conducted in the close-to-roof layer. The calculations of predictions allow to refer to the planned longwall, on account of the emitting methane, with possible and safe output quantity. Planning of extraction in the close-to-roof layer of a seam of large thickness with roof caving is especially important in con- ditions of increasing methane saturation with the depth of deposition and should be preceded by a prognostic analysis for de- termining the extraction possibilities of the planned longwall.
BACKGROUND: Basic fibroblast growth factor (bFGF) exhibits neuroprotective functions, but the possible mechanisms of bFGF on vascular dementia remain unclear. OBJECTIVE: To explore the neuroprotective effects of b...
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BACKGROUND: Basic fibroblast growth factor (bFGF) exhibits neuroprotective functions, but the possible mechanisms of bFGF on vascular dementia remain unclear. OBJECTIVE: To explore the neuroprotective effects of bFGF on a mouse model of vascular dementia, with focus on oxidative damage. DESIGN, TIME AND SETTING: A randomized, controlled, animal experiment was performed at the Medical College of Beihua University from March to December 2008. MATERIALS: bFGF was purchased from Peprotech, USA. METHODS: A total of 80 healthy, Kunming mice were randomly assigned to control, sham-surgery, model, and bFGF groups. The model and bFGF groups were used to establish vascular dementia models by repetitive cerebral ischemia-reperfusion in a conscious state. In addition, bFGF group mice were intraperitoneally injected with bFGF (100 pg/kg) following model establishment, once a day for 7 consecutive days. MAIN OUTCOME MEASURES: The Morris water maze was used to determine the influence of bFGF on learning and memory abilities in vascular dementia mice. The pathomorphological changes in hippocampal CA1 neurons were observed by Nissl staining. Superoxide dismutase and malondialdehyde changes were analyzed using biochemical analysis methods. Annexin V-FITC/PI-double-labeled flow cytometry was used to detect neuronal apoptosis. RESULTS: Learning and memory functions in model mice significantly decreased, as characterized by prolonged latency and reduced time and number of platform crossings (P 〈 0.01, P 〈 0.05). Superoxide dismutase activity was significantly reduced, malondialdehyde content was significantly increased (P 〈 0.01), and hippocampal neuronal apoptosis was increased (P 〈 0.01) following vascular dementia, bFGF increased superoxide dismutase activity, decreased malondialdehyde content, and reduced hippocampal neuronal apoptosis (P 〈 0.01), which resulted in improved learning and memory in mice with vascular dementia. CONCLUSION: bFGF improved learning and memory deficits in
The phase order in a one-dimensional(1 D) piecewise linear discontinuous map is investigated. The striking feature is that the phase order may be ordered or disordered in multi-band chaotic regimes, in contrast to t...
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The phase order in a one-dimensional(1 D) piecewise linear discontinuous map is investigated. The striking feature is that the phase order may be ordered or disordered in multi-band chaotic regimes, in contrast to the ordered phase in continuous systems. We carried out an analysis to illuminate the underlying mechanism for the emergence of the disordered phase in multi-band chaotic regimes, and proved that the phase order is sensitive to the density distribution of the trajectories of the attractors. The scaling behavior of the net direction phase at a transition point is observed. The analytical proof of this scaling relation is obtained. Both the numerical and analytical results show that the exponent is 1, which is controlled by the feature of the map independent on whether the system is continuous or discontinuous. It extends the universality of the scaling behavior to systems with discontinuity. The result in this work is important to understanding the property of chaotic motion in discontinuous systems.
In this letter the scaling properties of the period-adding sequences in a so-called“multiple Devil’s staircase”are *** is certified both analytically and numerically that the width of the i-th phase-locked plateau ...
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In this letter the scaling properties of the period-adding sequences in a so-called“multiple Devil’s staircase”are *** is certified both analytically and numerically that the width of the i-th phase-locked plateau in a sequence scales as In|Δe(i)|∝i,and the position of the plateau scales as In|e_(∞)-e_(i)|∝*** properties are qualitatively different from those of the period-adding sequences in conventional Devil’s staircases.
The leakage of iterations from chaotic attractor near crisis due to dynamical inter-action between discontinuity and noninvertibility has been *** scaling law of the mean life time is derived *** numerical result show...
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The leakage of iterations from chaotic attractor near crisis due to dynamical inter-action between discontinuity and noninvertibility has been *** scaling law of the mean life time is derived *** numerical result shows very good agreement.
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