This paper presents a three-degree-of-freedom (3-DOF) ultrasonic vibration tool holder for milling and drilling operations. The 3-DOF vibrations are generated by novel actuator that contains three groups of piezoelectric rings actuating in X-, Y-, Z-directions at the natural frequencies structure. XY plane excited frequency but with slightly different amplitudes to produce an elliptical locus intermittent tool-workpiece contact, which assists process, along Z-axis used excites structure's...

Incorporating wind energy on a large scale into power systems presents challenges for the operation and control of grid. To enhance safety grid operation, accurate short-term forecasting is necessary, as it minimizes impact randomness. Considering uncertainty prediction issues associated with power, this paper introduces CNN–GRU ultra-short-term model. This model relies multichannel signals, including data such speed, direction, climate conditions, historical outputs collected from farms....

Abstract This paper presents the effects of ultrasonic vibration assistance on shear band formation and chip segmentation mechanism in orthogonal cutting Ti–6Al–4V. Experimental observations microstructure show that bands disappear when is applied along tangential direction at certain speeds. A plastic flow model developed to predict stress temperature variations primary zone cutting, elastic recovery, tool-chip separation periods. The simulation results vibration-assisted much lower...

Abstract Rollers and wheels are widely used in industry transportation, but there is seldom direct information about contact forces. A smart roller introduced which provides real‐time pressure measurements from a soft, elastomer‐coated cylinder. The designed for automated fiber placement (AFP) machines, the aerospace to manufacture complex composite parts. For optimum process performance, feedback highly desirable detecting flaws during manufacturing. sensor replaces elastomer outer layer of...

In recent years, cyber attacks have been intensifying and causing great harm to individuals, companies, countries.The mining of threat intelligence (CTI) can facilitate integration serve well in combating attacks.Named Entity Recognition (NER), as a crucial component text mining, structure complex CTI aid cybersecurity professionals effectively countering threats.However, current NER research has mainly focused on studying English CTI.In the limited studies conducted Chinese text, existing...

Foot plantar force monitoring has been explored using in-shoe soft insole measurements for application in diabetic foot and to assess footwear performance. Sensors are impractical regular use due bulky electronics short battery life. They typically lack shear sensing. A flexible custom configurable 3-axis capacitive sensing array is demonstrated through a customizable arrangement of 16-shear normal taxels completely imbedded shoe that wirelessly updates at 50 <tex...

With the rapid development of sensor technology on vehicles, more and vehicles are checked from artificial detection to auto monitoring. A great number real-time data acquired sensors provides important foundation for PHM application vehicles. Aiming at special mining vehicle, it proposes solution monitoring, fault diagnosis health management based theory. First, a kind service architecture is designed describe how implement vehicle system meet needs management. Second, describes each module...

Renal hypoxia and its associated oxidative stress is a common pathway for the development of kidney diseases, using dietary antioxidants such as flavan-3-ols to prevent failure has received much attention. This study investigates molecular mechanism by which hypoxia-induced cell death in renal tubular epithelial cells. Human proximal cells (HKC-8) were exposed (1% O2) presence (catechin, epicatechin, procyanidin B1, B2). Cell was examined flow cytometric analysis. Gene expression determined...

Covers advancements in spacecraft and tactical strategic missile systems, including subsystem design application, mission analysis, materials structures, developments space sciences, processing manufacturing, operations, applications of technologies to other fields.

Existing smartwatches offer convenient health monitoring and interfaces with mobile devices. However, the interactivity between a user smartwatch suffers from limited size of screen buttons. To improve usability smartwatches, novel human-computer interaction methods are introduced into watchband. this end, we present modular lightweight watchband consisting various capacitive sensing modules—TouchBand. It is made flexible printed circuit board (PCB) supporting bottom electrodes,...

Asymmetric vane spacing design has drawn the attention of many researchers as a targeted and potential method controlling blade forced response. In this paper, we studied influence asymmetric stator variation on reduction downstream rotor vibration. We use simplified to calculate aerodynamic force surface. To validate accuracy vibration response under load, transient analytical fluid-structure interaction was applied. adopt two high pressure turbine stages research objects. compared stress...

Abstract This paper provides a new method to determine the equivalent circuit parameters for two λ/2 resonators filter structure. The combines direct parameter-extraction technique and optimization method. Both extrinsic intrinsic in are determined at low frequency by using de-embedding as initial values optimization. calculated response of model structure agrees well with measured results both magnitude phase. Keywords: Equivalent circuitλ/2 filterDirect techniqueOptimization...

Remaining useful life (RUL) is crucial to the condition and health monitoring. This paper proposes an adaptive RUL prediction method for DC-link film capacitors power electronic applications. By using proportional hazards model framework, this integrates degradation data time-to-failure data, quantify component failure behavior in a probabilistic way. It employs mixed-effects characterize of capacitors. The hazard rate applied likelihood capacitor failure. operational conditions are...

Lightning is a familiar natural phenomenon, which heard sometimes that thunder causes damages to the electrical appliances and facilities. So lightning protection device has been necessity make sure security of production living. Earthing very important part system. We propose earthing method solves problem high cost traditional method, design realize an Internet-of-Things (IoT) system for parameter monitoring. The nodes wireless sensor network (WSN) measure value grounding resistance many...

An efficient design method of four parallel channels in-order FFT with single floating-point butterfly is proposed, to reduce the resource consumption and improve real-time calculation ability. The radix-4 deduced calculate access address for channel data parallel. hardware architecture proposed presented, precision adder multiplier are also depicted. a 1024 points implemented in FPGA, performance compared previous literatures some EDA corporations IP cores, which shows correctness...

The Cyclic Redundancy Check (CRC) technology is adopted to solve the problems such as cumbersome testing of relay protection and safety automatic devices, wide range power failure easy omission tested equipment in renovation expansion smart substation. gets test boundaries identify that needs be during retrofitting work, extracts intelligent electronic devices (IED) should tested, avoid unnecessary IED transmission testing. division domain verification sub-CRC through CRC checks give...

Soft flexible capacitive sensors are demonstrated that can capture a combination of pressure, shear, and proximity information intended for medical, sports robotics applications. They consist three major components—silicone elastomer, conductive fabric, printed circuit boards (FPCB). Empowered by custom readout utilizing the Cypress PSoC 6 MCU, systems consume 20 mW while scanning transmitting measurement data via Bluetooth Low-Energy (BLE) 5.0. Pressure, visualized in mobile application....