To provide information for the detection, prediction, and control of inlet unstart, entire process from a started status to an unstarted generic two-dimensional hypersonic is studied experimentally at Mach 5. The movement flow plug exit duct used gradually increase throttling simulate unstart caused by excessive heat release in combustor. Simultaneous high-speed schlieren imaging dynamic surface pressure measurements are record unsteady structures pressures process. According internal...

To improve the accuracy of standard finite element (FE) solutions for acoustic radiation computation, this work presents coupling a radial point interpolation method (RPIM) with FEM based on triangular (T3) mesh to give coupled “FE-Meshfree” Trig3-RPIM two-dimensional problems. In element, local approximation (LA) is represented by polynomial-radial basis functions and partition unity (PU) concept satisfied using shape functions. Incorporating present appropriate non-reflecting boundary...

Background There is no study accessible now assessing the prognostic aspect of radiomics for anti-PD-1 therapy patients with HCC. Aim The aim this was to develop and validate a nomogram by incorporating pretreatment contrast-enhanced Computed tomography (CT) images clinical risk factors estimate treatment efficacy in Hepatocellular Carcinoma (HCC) patients. Methods A total 58 advanced HCC who were refractory standard first-line therapy, received PD-1 inhibitor Toripalimab, Camrelizumab, or...

Janus emulsion assays that rely on carbohydrate-lectin binding for the detection of Escherichia coli bacteria are described. Surfactants containing mannose self-assembled at surface droplets to produce particles with lectin sites. orient in a vertical direction as result difference densities between hydrocarbon and fluorocarbon solvents. Binding mannose(s) causes agglutination tilted geometry. The distinct optical naturally aligned agglutinated produces signals can be detected...

In this work, the smoothed finite element method using four-node quadrilateral elements (SFEM-Q4) is employed to resolve underwater acoustic radiation problems. The SFEM-Q4 can be regarded as a combination of standard (FEM) and gradient smoothing technique (GST) from meshfree methods. SFEM-Q4, only values shape functions (not derivatives) at quadrature points are needed traditional requirement coordinate transformation procedure not necessary implement numerical integration. Consequently, no...

Polycyclic aromatic hydrocarbons (PAHs) are widely present in the environment. The coking industry is an important industrial source of PAHs. Coke production China accounts for 67.44% total global coke production. Tangshan, a coastal city on Bohai Rim, contains largest cluster plants China. Extremely high PAH emissions Tangshan may cause long-distance cross-border pollution problems. In this study, concentrations and sources 16 priority PAHs soil at plant were determined risks posed by...

Catalytic combustion of ubiquitous chlorinated volatile organic compounds (CVOCs) encounters bottlenecks regarding catalyst deactivation by chlorine poisoning and generation toxic polychlorinated byproducts. Herein, Ru, Pd, Rh were loaded on {001}-TiO2 for thermal catalytic oxidation chlorobenzene (CB), with Ru/{001}-TiO2 representing superior reactivity, CO2 selectivity, stability in the 1000 min on-stream test. Interestingly, both acid sites reactive active oxygen species (ROS) remarkably...

Capacity–flow balance constitutes the primary challenge in strategic slot allocation. Both air traffic flow and airport are significantly influenced by departure/arrival times of flights. However, due to various uncontrollable factors such as control, delay propagation, weather conditions, actual flights inevitably deviate from their schedules. This reflects inherent uncertainty flight execution, which directly introduces into capacity–flow analysis. In this paper, we develop an allocation...

A hypersonic inlet with side compression has been tested at a freestream Mach number of 6.0 to enrich the understandings unstart. flow plug is placed duct exit simulate combustion induced high pressure and initiate High-speed schlieren imaging time-resolved measurements are used simultaneously record unsteady structures surface pressures unstart process. The operates in big buzz mode base frequency 30 Hz exhibits series patterns similar those rectangular inlets cycle when throttling ratio...

A rectangular external-compression supersonic inlet with a shock-on-lip Mach number of 2.0 is carefully studied at freestream 2.5. In the throttling process before onset buzz, interaction between ramp shock and cowl-induced bow appears as regular reflection, λ-shaped pattern successively. It interestingly found that currently observed which should have been broken down shortly after emergence reported previously, keeps fairly stable until ratio changes. remaining buzz stage, three types...

A rectangular hypersonic inlet is tested at the low-speed mode ( 5), design 6), and overspeed 7) to enrich understanding of hypersonic-inlet unstart. flow plug placed duct exit simulate combustion-induced high pressure initiate High-speed schlieren imaging time-resolved measurements are used simultaneously record unsteady-flow structures surface pressures unstart process. The results indicate that processes basically same for mode. An phenomenon dominated by ramp-side separation, which...

A rectangular external-compression supersonic inlet with partially isentropic compression is experimentally studied at a freestream Mach number of 2.0. During the test, operates little buzz state after going through supercritical and steady subcritical state. striking feature that both most upstream downstream positions unsteady separation point forebody boundary layer take on linear variation trend increase throttling ratio, yielding an intensifying flow oscillation. Then, mixed phenomenon...

A solvatochromic colorimetric sensor array was used to discriminate among common solvents; chemical and physical changes contribute response.

Understanding the hypersonic inlet starting characteristics is prerequisite for avoiding abnormal unstart state. To make work close to actual situation, an experimental study was performed on a scramjet model at simulated freestream Mach number of 6.0 with pressure and thrust measurements. The working status determined by heat release injected ethylene reciprocating variations. results show that critical equivalence ratio restart state lower than state, which means combustion weakens...

Under the background of “peak carbon dioxide emissions by 2030 and neutrality 2060 strategies” grid-connected large-scale renewables, grid usually adopts a method optimal scheduling to improve its ability cope with stochastic volatile nature renewable energy increase economic efficiency. This article proposes short-term model for wind–solar storage combined-power generation systems in high-penetration areas. After comprehensive consideration battery life, units, load characteristics, hybrid...

The passive detection of underwater targets relies on sensitive pressure sensors. In this study, we introduce a self-adhesive sensor for non-contact target detection. sensors are made hybrid carbon nanotube assembly. aligned component fosters dense contacts between the nanotubes, which responsible sensor's ability to detect changes as small 18 mPa, with 99.82% linearity in 18–178 mPa range, and lifespan exceeding 10,000 cycles. nonaligned ensures robust adhesion while minimizing impedance...

AbstractAbstractFluid flow characteristics in a two strand slab continuous casting tundish with different configurations of argon gas bubbling curtain (GBC) were investigated physical modelling experiments. It was found from this research that the GBC small rate acted as dam and could greatly improve tundish. increased dramatically peak concentration time plug volume, decreased dead created surface directed eliminated short circuiting. Therefore, fluid favourable to floatation separation...