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A high ambient contrast ratio (ACR) is essential for achieving a high dynamic range in advanced display applications, but reported ACR enhancement strategies always result in reduced optical efficiency of light-emitting diode (LED) display devices. In this study, an Fe3O4-magnetic particle-chained pillar array (Fe3O4-MPCP) structure was introduced to improve the ACR of LED display devices with low optical loss. The results indicated that the MPCP structure achieved high ACR at an oblique angle using surface pillar array to suppress ambient light reflections, and its internal magnetic particle chain improved the transmissivity to maintain high device efficiency. Compared with the commercial graphite-coated device at typical viewing angles (i.e., 0 deg and 60 deg), the ACR of the optimal MPCP device increased by 217 and 140%, while the device efficiency increased by 25 and 12%, respectively. Therefore, the proposed method provides a novel approach for significantly improving ACR at all oblique angles while maintaining high device efficiency, which can be easily integrated into various LED display devices and has significant potential in advanced display applications.

The biodegradable natural jute threads (JT) were braided into jute flag ropes (JFR) by a flag braiding machine first. Then, JT and JFR were woven into plain-woven jute thread fabrics (JTF) and jute flag rope fabrics (JFRF), respectively, by using a dobby loom. Subsequently, JTF and JFRF were impregnated with polylactic acid (PLA) resin to become JTF/PLA and JFRF/PLA composites, respectively. These JTF/PLA and JFRF/PLA composites are biodegradable. The tensile, compressive, and bending characteristics of these composites were examined by a material test system (MTS 810). In addition, the impact properties of these composites were evaluated by an Izod tester. The experimental results show that the braiding technique strengthened the jute ropes. The JFRF/PLA composite has high tensile strength, compressive modulus, bending modulus, and impact resistance

An integrated digital magnetic resonance imaging spectrometer was proposed in this study. By using the FPGA chip Artix7 200T, timing control, data processing, digital frequency conversion and phase control were implemented into a single-chip, thus effectively improved timing accuracy and phase accuracy, while avoided the structural design complexity caused by multi-board connection and improved system integration and imaging quality.

Patterned structures in perovskite light-emitting diodes (PeLEDs) contribute to improved external quantum efficiency; however, unsatisfactory light outcoupling resulting from multi-interface optical loss remains a primary and unsolved challenge. This study investigated the effect of multi-interface patterns on the light outcoupling of PeLEDs using a SiO2-microcolumn pattern (SMP). It was found that the optical loss of PeLEDs decreased as the number of patterned interfaces increased. This was attributed to the strong scattering effect and the utilization of waveguide and surface plasmon polariton modes at the bottom interface and the electron transmission layer of the top electrode. A PeLED with a five-interface structure based on an SMP substrate was prepared to verify the improved light outcoupling, indicating that a synergistic design in light coupling and perovskite film formation should be considered to fabricate efficient devices with multi-interface patterns.

Talaromycosis (penicilliosis) caused by Talaromyces marneffei is one of the most important opportunistic infection diseases in tropical countries of South and Southeast Asia. Most infections occurred in individuals with human immunodeficiency virus (HIV) and the primarily reason for the increase in the number of the cases is HIV pandemic. The pathogenesis of T. marneffei infection is unclear. There is still no ideal animal model for studying Talaromycosis. In this study, we developed a stable, safe and maneuverable murine model that mimics human T. marneffei disseminated infection using T. marneffei yeast intraperitoneal injected to BALB/c nude mice. We successfully observed symptoms similar to those seen in clinical patients in this murine model, including skin lesions, hepatosplenomegaly, pulmonary infection and mesenteric lesions. We further studied the pathological changes of various tissues and organs in the infected animals to help better understand the severity of the infection. This model may provide a good tool for studying disseminated infection induced by T. marneffei.

Talaromycosis (penicilliosis) caused by Talaromyces marneffei is one of the most important opportunistic infection diseases in tropical countries of South and Southeast Asia. Most infections occurred in individuals with human immunodeficiency virus (HIV) and the primarily reason for the increase in the number of the cases is HIV pandemic. The pathogenesis of T. marneffei infection is unclear. There is still no ideal animal model for studying talaromycosis. In this study, we developed a stable, safe and maneuverable murine model that mimics human T. marneffei disseminated infection using T. marneffei yeast intraperitoneal injected to BALB/c nude mice. We successfully observed symptoms similar to those seen in clinical patients in this murine model, including skin lesions, hepatosplenomegaly, pulmonary infection and mesenteric lesions. We further studied the pathological changes of various tissues and organs in the infected animals to help better understand the severity of the infection. This model may provide a good tool for studying disseminated infection induced by T. marneffei.

The essential oils of Artemisia argyi Lévl. et Vant were extracted and separated using three methods, hydrodistillation (HD), supercritical fluid extraction (SFE), and SFE coupled molecular distillation (SFE-MD). Various extraction parameters of SFE were optimized by process modeling of Hansen solubility parameters which are 30 MPa, temperature 45°C, no co-solvents, extraction time 2 h, and flow rate of 90 kg/h. The essential oils obtained by HD and SFE-MD have similar major compositions. The antimicrobial activities were examined according to the agar well diffusion method and the minimum inhibition concentrations against Staphylococcus aureus and Escherichia coli were compared.Abbreviations A. argyi, Artemisia argyi; CFU, Colony Forming Unit; DMSO, dimethylsulfoxide; E. coli, Escherichia coli; GC-MS, Gas Chromatography-Mass Spectrometer; HD, hydrodistillation; HSP, Hansen solubility parameters; MIC, minimum inhibition concentration; OSE, organic solvents extraction; RSM, response surface methodology; SCCO2, supercritical-CO2; SFE, supercritical fluid extraction; SFE-MD, SFE coupled molecular distillation; SMILES, Simplified Molecular Input Line Entry Syntax; S. aureus, Staphylococcus aureus

Tandem structures with different subpixels are promising for perovskite-based multicolor electroluminescence (EL) devices in ultra-high-resolution full-color displays; however, realizing excellent luminance- and color-independent tunability considering the low brightness and stability of blue perovskite light-emitting diodes (PeLEDs) remains a challenge. Herein, a bright and stable blue gallium nitride (GaN) LED is utilized for vertical integration with a green MAPbBr

Ethnopharmacological relevance Compound Agrimony Enteritis Capsules (FFXHC) is an ethnomedicine derived from Yi Nationality Herbal Medicine for the treatment of enteritis. We found that compared to berberine hydrochloride (BBR), a component of this medicine, FFXHC was more efficacious in the mouse model of IC mice in significantly alleviating lung and intestinal lesions. ” Our study provides a novel perspective into the pharmacological mechanism of action of the ethnic compound FFXHC. Aim of the study To determine the underlying mechanism of the superiority of FFXHC over BBR in IC. Materials and methods The susceptibility of Candida albicans to FFXHC was evaluated in vitro. The mouse model of IC was established and the survival rate, weight change, the number of organ colonies, and immune organ coefficient of the mice were determined, the effect of FFXHC on the immune function of mice, including changes in the number of immune cells, levels of the related inflammatory cytokines (INF-γ, TNF-α, MCP-1, IL-6, and IL-17A), and the antimicrobial peptide, LL-37 (CRAMP in mice), were determined. Mice feces were collected and changes in the intestinal microecology were studied. Results Our findings indicated that FFXHC was not active against Candida albicans and did not restore the sensitivity of the resistant strain in vitro; however, it had a therapeutic effect that improve survival rate on mice with IC. The number of lymphocytes and neutrophils of mice with IC treated with FFXHC increased significantly. The intestinal microecology of mice was restored and the abundance of the probiotic Bacteroides was increased, which further stimulated the production of the antimicrobial peptide, LL-37, which is required for acquired immunity. Furthermore, the levels of Th cell-related cytokines, including INF-γ, TNF-α, and IL-17A were significantly increased, whereas those of the proinflammatory cytokines, IL-6 and MCP-1, decreased. With the activation of acquired immunity, the immune function of mice was restored, the body weight and survival rate of mice improved considerably, the coefficients of the thymus and spleen increased, and the number of fungal colonies in the lung and kidney decreased. Conclusions FFXHC could eliminate fungi by increasing the relative abundance of probiotics in Bacteroides and the number of neutrophils, thereby promoting the production of CRAMP and resulting in a fungicidal effect, leading to acquired immunity. Although BBR has an antifungal effect, we found that it was not as effective as FFXHC.

Herein, a new Mg-Zn-Ca-Y wrought alloy designed by micro-alloying of Ca and Y and subjected to an appropriate processing technique that showed an excellent combination of high strength and ductility at room and elevated temperatures. Density functional theory calculation indicates that Y atoms can incorporate into Ca2Mg6Zn3 phases by replacing Ca atoms, which increases the number density of the Ca2Mg6Zn3 phase and refine their size. The pinning effect of precipitates hinders grain growth and leads to a fine average grain size (~2.5 μm), which also results in high tensile properties. Meanwhile, the solid-soluted Zn, Ca, and Y elements, numerous nano-precipitates and Luders elongation promote the dislocation accumulation during further tensile deformation, which enhances both strain hardening and strain hardening rate, leading to a high elongation. Moreover, the annealed ZXW600 alloy exhibits high strength at high temperatures (≤ 120 °C), which is attributed to the strong pinning effect of fine particles. This work will be helpful for the development of new high-alloyed Mg-Zn based wrought alloys with high performance and extensive application in industries.

Achieving high strength-ductility synergy is a great challenge in low-alloyed Mg alloys. In this work, a new Mg–1.0Zn–0.45Ca–0.35Sn–0.2Mn (wt.%, ZXTM1000) alloy was designed and fabricated by sub-rapid solidification (SRS) to overcome the dilemma. After hot rolling and annealing, the new alloy sheet exhibited an excellent tensile yield strength (YS, ∼270 MPa) and elongation (∼21%). Microstructure characterization revealed that the high YS was mainly attributed to the fine grains (∼3 μm) and high density of spherical Ca2Mg6Zn3, Mg2Ca, and α-Mn precipitates. Moreover, the homogeneous grain size distribution, weakened TD-split texture and the activation of multiple types of slips contributed to the enhanced ductility. The findings demonstrate an effective way to fabricate low-alloyed Mg alloys with high strength and ductility by combining the SRS and hot rolling.

Owing to the low alloying content in commercial wrought Mg alloys, their strengthening potential is greatly suppressed. It is difficult to achieve the synergy of high strength and formability for Mg alloys. In the present work, a novel high-alloyed Mg–6Al–1Zn–1Sn-0.5Bi (AZTB6110) alloy was designed by multi-component composition design and subjected to a fabrication route coupling sub-rapid solidification and controlled rolling. The alloy has excellent tensile properties, i.e. yield strength (YS) of ~260 MPa, ultimate tensile strength (UTS) of ~363 MPa and elongation of ~15%. The role of Al content (4, 6 and 8 wt %) on microstructure and tensile properties was systematically investigated in the AZTB alloys. When the Al content reaches 6 wt %, the combined pining effects of nano- and submicro-precipitates (Mg17Al12 and Mg2Sn) hinder the grain growth and result in the finest grain size (~3 μm) among the studied alloys. The refined grains as well as densely dispersed fine Mg17Al12 and Mg2Sn particles result in the best tensile yield strength in AZTB6110 compared to the other alloys. Meanwhile, the high ductility is benefited from the strong work-hardening capacity resulting from the interaction of dislocations with Al, Zn, Sn and Bi solutes and numerous nano-precipitates. Such a designed alloy helps to improve the development of high-alloyed multicomponent Mg alloys with high performance, which broadens the composition range and application of traditional wrought Mg alloy sheets.

Based on BP neural network algorithm, combined with PID linear control theory, we establish neural network residual training model of mechanical seal device, and design the simulation system of mechanical seal device with FLUENT simulation software. In order to verify the availability and reliability of the system, we design two different mechanical sealing devices, and do simulation calculation on the two kinds of devices. We get the sealing pressure field and velocity field distribution curve of device 1 and device 2. Through calculation we get sealing quality change curve with time. Through comparing the two different sealing performances we found the sealing effect of device 2 is better, the sealing efficiency reaches 98.2%, which meets the design requirements of the mechanical seal.

To improve the firing stability of Galtling gun by installing an arc-shaped support plate on a light tripod,a firing dynamic model of Gatling gun shooting on light tripod which has a arc-shaped support plate fixed on the different positions established based on rigid-flexible multi-body dynamic theory. The muzzles vibration and tripods deformation obtained through dynamic simulation. The results show that while the arc-shaped support plate fixed close to the bracket, the supporting effect to Galting gun decreased, tripods deformation and muzzles vibration increased. On the contrary, it reduced muzzles vibration and enhanced the firing stability. The analytic results provide a reference to improve the arc-shaped support plate in tripod.

A new synthetic technology of Strontium carbonate with ultrasonic is introduced in this article. Ultrasonic wave synthetic technology is a fast and novel method. Spherical SrCO3 powders were synthesized by changing the solvent and reaction conditions using the ultrasonic wave method. The SrCO3 powders were characterized by the XRD and SEM.The results show that the asprepared products were Spherical structure and with high dispersity, the average particle size of the SrCO3 powders synthesized by the ultrasonic wave synthetic technology is 0.3nm~ 0.5nm. Some reaction parameters were investigated during the process.

A mathematical model for the output waveform of SPWM VSI (voltage source inverter) is created specific to the harmonic problem of SPWM voltage source inverter. Through theoretical analysis and calculation, we can get the distribution regularity of the output harmonic wave in the process of frequency conversion and voltage transformation. Utilizing the matlab to verify the simulation, we can get such results like “frequency conversion will lead to the shift of the harmonic wave’s distribution center”, “voltage transformation will cause the valuable change of the harmonic wave and the valuable change direction of harmonic wave is opposite to that of the fundamental wave”. All of these will have significant guide meaning to the application of SPWM.

A control method based on genetic neural network is presented to deal with the nonlinear object of the high-power PS-FB-ZVS PWM DC/DC converter. The control system optimizes the initial weight of the BP neural network and PID parameters tuning on line utilizing the genetic algorithm, which directly controls the object in closed-loop and has solved the problem that the controller network initial weight coefficient influences the control effect, thus, the optimal dynamic and steady state performance of the system is ensured. In the MATLAB environment, the control systems consisting of different controllers are simulated, and the output voltage and output current waveforms are obtained when the system is loaded by experiment. The results show that the controller has strong robustness, fast response speed, and small output voltage fluctuations with load changes.

The resistance spot welded magnesium alloy joints consist mainly of weld nugget and heat-affected zone (HAZ). The nugget contains two different structures, the cellular-dendritic structure at the edge of the nugget and the equiaxed dendritic structure in the center of the nugget. The structure transition is attributed to the changes of solidification conditions. In HAZ, the grain boundary melting occurred and grain boundaries became coarse. The magnesium alloy nugget has a high hot cracking susceptibility. The cracks appeared in the nuggets when the welding current was higher than 15 kA. With an increase of welding currents from 15 kA to 23 kA, the joint tensile shear load rises from 1460 N to 3000 N and the nugget diameter increases from 4.2 mm to 6.5 mm. The joint strength rises are mainly related to increasing the nugget diameter. It is favorable to select relatively high welding current for improving mechanical properties of spot welded magnesium alloy joint.