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Due to resource limitation, nonlinear impulsive control tactics related to integrated pest management have been proposed in a generalized pest-natural enemy model, which allows us to address the effects of nonlinear pulse control on the dynamics and successful pest control. The threshold conditions for the existence and global stability of pest-free periodic solution are provided by Floquet theorem and analytic methods. The existence of a nontrivial periodic solution is confirmed by showing thedoi:10.1515/math-2018-0114 fatcat:yvbr3clkhvb6bfwxvftjyraoqe
more »... existence of nontrivial fixed point of the stroboscopic mapping determined by time snapshot, which equals to the common impulsive period. In order to address the applications of generalized results and to reveal how the nonlinear impulses affect the successful pest control, as an example the model with Holling II functional response function is investigated carefully. The main results reveal that the pest free periodic solution and a stable interior positive periodic solution can coexist for a wide range of parameters, which indicates that the local stability does not imply the global stability of the pest free periodic solution when nonlinear impulsive control is considered, and consequently the resource limitation (i.e. nonlinear control) may result in difficulties for successful pest control.
Blue luminescent carbon quantum dots (CQDs) were prepared from cyanobacteria by a hydrothermal method. The PL quantum yields of the obtained CQDs was 5.30%. Cyanobacteria-based carbon quantum dots/polyvinyl alcohol/nanocellulose composite films were prepared, which could emit bright blue under UV light. FTIR characterization showed that the composite films had hydroxyl groups on the surface and no new groups were formed after combining the three materials. The photoluminescence (PL) spectradoi:10.3390/polym12051143 pmid:32429528 fatcat:ors6edrvyrbezo7id3p5ejo5x4
more »... aled that the emission of the prepared CQDs was excitation dependent. Studies on the water resistance performance and light barrier properties of the composite films showed that they possessed higher water resistance properties and better UV/infrared light barrier properties. Therefore, we report the cyanobacteria-based carbon quantum dots/polyvinyl alcohol/nanocellulose composite films have the potential to be applied in flexible packaging materials, anti-fake materials, UV/infrared light barrier materials and so on.
Combustion and Flame
Using numerical simulation Li et al. ...doi:10.1016/j.combustflame.2014.07.021 fatcat:wwlatrkg55efdfqngz5ftgbo34
According to resource limitation, a more realistic pest management is that the impulsive control actions should be adjusted according to the densities of both pest and natural enemy in the field, which result in nonlinear impulsive control. Therefore, we have proposed a Beddington–DeAngelis interference predator-prey model concerning integrated pest management with both density-dependent pest and natural enemy population. We find that the pest-eradication periodic solution is globally stable ifdoi:10.1155/2020/8829235 fatcat:z3ci25yne5fvjndckq6lfyllqy
more »... the impulsive period is less than the critical value by Floquet theorem. The condition of permanent is established, and a stable positive periodic solution appears via a supercritical bifurcation by bifurcation theorem. Finally, in order to investigate the effects of those nonlinear control strategies on the successful pest control, the bifurcation diagrams showed that the model exists with very complex dynamics. Consequently, the resource limitation may result in pest outbreak in complex ways, which means that the pest control strategies should be carefully designed.
Li et al. (2003) took the coating treatment on the surface of P30 carbide tools through Capacitive Voltage Divider (CVD) and Physical Vapor Deposition (PVD), used them to cut high-density fiberboard, ...doi:10.15376/biores.13.1.wei fatcat:oxdo3ktm4jc2veqaya2kmkdhku
Li et al.  proposed a new method to quantify robustness and considered the dynamic effects and the internal force redistribution within a frame structure. ...doi:10.3390/sym12061008 fatcat:4e3k4wqodbf7pls4km6hnitdkq
A rapid, simple and cost-effective approach to prepare hierarchical porous carbons (PCs) for supercapacitors is reported by microwave activation of abundant and low-cost waste palm, biochar (BC) and KOH.doi:10.1039/c9ra03031j pmid:35519395 pmcid:PMC9065327 fatcat:ifrgm2euffhnpbovfcpbtt4mgy
In a paper  , López-Gómez and Sabina de Lis have proved that du a /da converges uniformly to ∞ with a ⟶ λ Ω 0 1 on any compact subset of Ω 0 . ...doi:10.1155/2021/9970255 fatcat:44i3v4xvrjgl3ktisztms7xuo4
Electrospinning Method Used to Create Functional Nanocomposites Films
Mei 2 , Xiuqiang Zhang 3 , Tingzhou Lei 3 , Zhen Zhang 1 and Meichun Li 1 *Address all correspondence to: email@example.com 1 School of Renewable Natural Resources, Louisiana State University, Baton Rouge ... … http://dx.doi.org/10.5772/intechopen.76392 Electrospun Poly(Ethylene Oxide) Fibers Reinforced with Poly (Vinylpyrrolidone) Polymer… http://dx.doi.org/10.5772/intechopen.76392 Qinglin Wu 1 *, Changtong ...doi:10.5772/intechopen.76392 fatcat:ltx3rcxv25dfrlsrvdorgkq5iq
However, the key to the electrochemical performance of SCs lies in the choice and design of electrode materials. ... increasing energy demand for power, a new generation of energy devices with advanced, low cost, and sustainable sources have attracted great attention from industry, including supercapacitors (SCs), Li-ion ...doi:10.3389/fchem.2020.00089 pmid:32154215 pmcid:PMC7044675 fatcat:354zhyknjvdmfginegttlliipu
An expectation for optimal integrated pest management is that the instantaneous numbers of natural enemies released should depend on the densities of both pest and natural enemy in the field. For this, a generalised predator–prey model with nonlinear impulsive control tactics is proposed and its dynamics is investigated. The threshold conditions for the global stability of the pest-free periodic solution are obtained based on the Floquet theorem and analytic methods. Also, the sufficientdoi:10.1186/s13662-020-02971-9 doaj:32854bd133204637820ed01f39ea75ee fatcat:wffikeolcbe3piufuqkqiqm7hy
more »... ons for permanence are given. Additionally, the problem of finding a nontrivial periodic solution is confirmed by showing the existence of a nontrivial fixed point of the model's stroboscopic map determined by a time snapshot equal to the common impulsive period. In order to address the effects of nonlinear pulse control on the dynamics and success of pest control, a predator–prey model incorporating the Holling type II functional response function as an example is investigated. Finally, numerical simulations show that the proposed model has very complex dynamical behaviour, including period-doubling bifurcation, chaotic solutions, chaos crisis, period-halving bifurcations and periodic windows. Moreover, there exists an interesting phenomenon whereby period-doubling bifurcation and period-halving bifurcation always coexist when nonlinear impulsive controls are adopted, which makes the dynamical behaviour of the model more complicated, resulting in difficulties when designing successful pest control strategies.
The suppressor of cytokine signaling 3 (SOCS3) is a specific negative regulator of signal transducer and activator of transcription 3 (STAT3) signaling, which is predominantly activated to induce neuroinflammatory response in microglia and functions essential roles during cerebral ischemia-reperfusion (I/R) injury. Constitutive photomorphogenesis 9 (COP9) signalosome (CSN) is a signaling platform controlling protein stability by remodeling of cullin-RING ubiquitin ligases, which is recentlydoi:10.2147/ndt.s298966 pmid:33911869 pmcid:PMC8075360 fatcat:ptvhbnaxyrhybfg5konnkiylym
more »... rted to specifically recognize proteins with SOCS-box domains. However, whether SOCS3 is related to COP9 signalosome in neuroinflammation during cerebral I/R injury is completely unclear. Mice subjected to transient middle cerebral artery occlusion (MCAO) and reperfusion, and BV2 microglia cells treated with oxygen-glucose deprivation and reoxygenation (OGD/R) were used to mimic cerebral I/R injury. Western blot, qRTPCR, immunofluorescence, and co-Immunoprecipitation assays were performed to explore the regulatory mechanism of SOCS3 on neuroinflammation and the relationship of SOCS3 and COP9 signalosome during cerebral I/R injury. SOCS3 expression is significantly upregulated in microglia during OGD/R treatment, and overexpression of SOCS3 suppresses OGD/R-induced STAT3 activation and inflammatory factor expression. Furthermore, we find that COP9 signalosome subunit 3 (CSN3) interacts with SOCS3 protein to enhance its stability, thereby resulting in restricting OGD/R-induced STAT3 activation and inflammatory response. Moreover, we find that knockdown of CSN3 evidently accelerates STAT3 activation, and aggravates cerebral I/R injury in vivo. CSN3 restricts neuroinflammatory responses during cerebral I/R injury through stabilizing SOCS3 protein and indicates that CSN3 a potential therapeutic target for cerebral I/R injury.
To compare the clinical effects of local anesthesia (LA), general anesthesia (GA) and modified sensation-motion separation anesthesia (MA) in percutaneous endoscopic interlaminar discectomy (PEID) in the treatment of L5/S1 lumbar disc herniation (LDH) for the purpose of guiding junior surgeons. Eighty-four patients with L5/S1 LDH underwent PEID using three anesthesia methods. Patients in the LA (26), GA (29) and MA (29) groups received a follow-up examination retrospectively. The generaldoi:10.2147/jpr.s306319 pmid:34267548 pmcid:PMC8275187 fatcat:qo7glbwpjfhvje5yhsid4zcdmq
more »... ers, preparation and anesthesia duration, operative duration, recovery time, incidence of complications, ambulation time, length of hospital stay, incidence of severe complications, and reoperation rate were compared, and clinical outcomes were analyzed using a visual analog scale (VAS), the Oswestry Disability Index (ODI), and the Short-Form Health Survey 36 (SF-36). MA demonstrated obvious advantages over the other two methods with respect to operative duration and resulted in a better intraoperative experience than LA. The patients in the MA group required less time in bed postoperatively and shorter hospital stays than those in the GA group. The mean postoperative VAS, ODI and SF-36 scores were significantly better than the preoperative scores in all groups (P<0.05), but no significant differences in these scores were found among the three groups (P>0.05). Three cases (3/29) of nervous disorder occurred in the GA group. Two patients (one in the GA group (1/29) and one in the LA (1/26) group) underwent revision surgery, with a total recurrence rate of 2.4% (2/84). Due to its high safety and good tolerance by patients, MA is a suitable method for spinal surgeons who are inexperienced with PEID in the treatment of L5/S1 disc herniation.
In the original version of the published article, the scanning electron microscopy images of Sr 2 CoWO 6 (Co/W = 3: 2 and 1: 4 samples in Figure 1D ,E appear to be the same image of one sample from different magnifications and MottÀSchottky plots in Figure 3A -C were not plotted and calculated based on the Y-axis at 0. The corrected MottÀSchottky plots of Figure 3 (A-C) based on the Y-axis at 0 and following band structure analysis are provided herein. These corrections are minor and do notdoi:10.1002/solr.202000702 fatcat:jqzidxvyanbb7ksiadvkrlyh7u
more »... r the conclusion of the paper. The authors apologize for any inconvenience or misunderstanding that this error may have caused. After correction, the values of the valence band (VB) and conduction band (CB) of the samples were slightly changed as can be seen in Figure 3D below. Accordingly, the paragraph describing the MottÀSchottky results are corrected as follows: "The flat band potentials (E fb ) of the Sr 2 CoWO 6 (Co/W ¼ 1: 1, 3: 2, and 1: 4) samples were calculated to be ca. 1.1 V, 0.86 V, and 0.63 V vs. NHE at pH ¼ 7, respectively. Generally, it is known that the flat-band potentials of p-type semiconductors are ca. 0.3 V more positive than the VB. With this assumption, the VB positions of the samples with Co/W ¼ 1: 1, 3: 2, and 1: 4 could be estimated to be ca. 1.4 V, 1.16 V, and 0.93 V vs. NHE at pH ¼ 7, respectively. Since the (E g ) of the samples with Co/W of 1: 1, 3: 2, 1: 4 are ca. 1.7 eV, 1.45 eV, and 1.77 eV, and the definition of eV is a unit of energy gained by the charge of a single electron moved across an electric potential difference of one volt (1 eV ¼ 1e 1V, 1e %1.602 10 À19 C), the CB positions of them can be estimated to be ca. À0.3 V, À0.29 V, and À0.84 V vs NHE at pH ¼ 7, respectively." Accordingly, the abstract is corrected as follows: "The sample synthesized with precursor Co/W ratio of 1:4 has CB and VB located at ca. À0.84 and 0.93 eV versus the normal hydrogen electrode (NHE) at pH ¼ 7, respectively." Figure 1. D and E) SEM images of Sr 2 CoWO 6 (Co/W = 3:2 and 1:4, respectively).
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