The triboelectric nanogenerator (TENG) is an emerging technology to convert energy for powering electrical devices. Extensive strategies have been studied enhance the output performance of TENG. Herein, nanopillar- and nanocone-structured SrTiO3 (STO)/PDMS composite films with different STO concentrations were fabricated as dielectric layer. effects morphologies nanostructured produced by anodic aluminum oxide (AAO) template method on electric properties TENG investigated. constant...

In recent years, China's natural gas industry has developed very rapidly, and its utilization scope use areas have gradually expanded. A lot of station yards been built all over the country. The girth weld compressor inlet outlet pipeline in affected by high pressure vibration fatigue for a long time during service, which is weak link pipeline. this paper, through field investigation 4 stations 14 units along pipeline, 106 welds area are identified. structural characteristics near multiple...

ABSTRACT The production of ethanol from xylose by ethanologenic Escherichia coli strain KO11 was improved adding various medium supplements (acetate, pyruvate, and acetaldehyde) that prolonged the growth phase increasing cell yield volumetric productivity (approximately twofold). Although added pyruvate acetaldehyde were rapidly metabolized, benefit these additives continued throughout fermentation. Both increased levels extracellular acetate through different mechanisms. Since can be...

Because the proportional–integral–derivative (PID) parameters selected by experience are random, control effect of fuzzy PID cannot be optimized. In order to improve accuracy and stability robot motion control, an orthogonal-fuzzy intelligent method is proposed. this paper, electric steering gear used as actuator, mathematical model servo motor joint drive system established. The simulation analysis original manipulator joints in Simulink software environment experiment show that using...

In order to realize the technique of quick picking and obstacle avoidance, this work proposes a trajectory optimization method for pickup manipulator under condition. The proposed is based on improved artificial potential field cosine adaptive genetic algorithm. Firstly, Denavit–Hartenberg (D-H) used carry out kinematics modeling manipulator. Taking into account motion constraints, algorithm utilized complete time-optimal planning. Then, collision problem in environment, establish...

The nonlinear interconnected system is a complex and important in daily production life general. Due to the interconnection influence between subsystems external disturbance factors, prone failure. For this kind of system, decentralized fault detection tolerant control method proposed here. Compared with traditional scheme, paper designs subsystem communication protocol reduce information exchange subsystems. Based on protocol, scheme then designed. existence threshold can detect time...

In the present research work, ternary effects of varying dosages graphene oxide encapsulated silica fume (GOSF), nano-silica sol (SS), and fly ash (FA) on rheological properties, compressive strength, content crystal size calcium hydroxide (CH), porosity, water absorption, microstructure cement were studied. The results showed that incorporation SF improved dispersion GO in matrix. GOSF was prepared through electrostatic attraction between positively charged negatively GO. mixture GOSF, SS,...

We conducted a cohort study to investigate the prognostic significance of vascular endothelial growth factor (VEGF) polymorphisms in hepatocellular carcinoma (HCC) patients after transcatheter arterial chemoembolization (TACE). In total, 156 with histologically confirmed HCC within 2 months were collected from January 2007 2008. The genotypes VEGF-2578C/A, -1154G/A, -634C/G, and -1498T/C determined blood extracted using kit on 384-well plate. survival rate at 5 years was 55.47%. Multivariate...

Abstract Recently, there has been an increasing interest in modelling and simulation of time‐varying (TV) non‐line‐of‐sight (NLOS) channels for global navigation satellite systems (GNSS) as assisted means resolving the GNSS urban canyon problem. In above context, TV NLOS have investigated studied due to their rapidly characteristics. However, conventional approaches multipath suffer from inconsistency lack physical soundness, resulting a non‐smooth transition Doppler shift low output...

Graphene oxide (GO) as a new nano-enhancer in cement-based materials has gained wide attention. However, GO is easy to aggregate alkaline cement mortar with poor dispersibility. This hinders its application practical infrastructure construction. In this work, GO-M18 polycarboxylate compound superplasticizer (GM) were obtained by compounding the M18 solution at different mass ratios. The dispersion of GM was systematically studied. phases and functional groups characterized XRD FTIR. effects...

In order to realize the following two goals including high electromechanical coupling coefficient (K2) and zero temperature of frequency (TCF) in a surface acoustic wave (SAW) device, propagation characteristics shear-horizontal type (SH-type) boundary waves Si/SiO2/Al/LiTaO3 “sandwich” structure are investigated by three dimensional (3D) finite element method (FEM). The influences layer SiO2 with different thickness (h) on SH-type characteristics, phase velocity (vp), reflection (kp), K2...

This paper analyzes the impact factors and principles of siting urban refueling stations proposes a three-stage method. The main objective method is to minimize vehicles’ detour time. first stage aims at identifying most frequently traveled road segments for stations. second focuses on adding additional serve vehicles whose demands are not directly satisfied by identified in stage. last further adjusts optimizes station plan generated two stages. A genetic simulated annealing algorithm...

Precise path loss models play a crucial role in design and optimization of wireless communication systems, requiring careful balance between accuracy efficiency. Deep learning presents promising approach for improving both aspects. This letter proposes novel that uses satellite images to construct comprehensive dataset with rich environmental information. By incorporating features into convolutional-neural-network-based model, the prediction is significantly enhanced. Comparisons validation...

The parameters optimization for injection molding based on digital signal processing is gave in this paper. First, design the program of with orthogonal test; Second, gating system, cooling systems and related process are chosen as experimental analysis factors to optimize process, analyze range variance test data by MATLAB, determine that affect forming quality significantly; Third, model established regression analysis; Finally, optimal found genetic algorithm. results shown method can...