Abstract Background Osteosarcoma (OS) is one of the most common aggressive bone malignancy tumors in adolescents. With application new chemotherapy regimens, finding and effective anti-OS drugs to coordinate program implementation urgent for patients OS. Oridonin had been proved mediate anti-tumor effect on OS cells, but its mechanism has not fully elucidated. Methods The effects oridonin viability, clonal formation migration 143B U2OS cells were detected by CCK-8, colony assays...

High impedance arc faults (HIAFs) happening in the medium-voltage distribution system may result damages to devices and human security. However, great difficulties exist identifying these due much weaker features varieties when grounded with different surfaces. This paper presents an integrated algorithm detect HIAFs high-resolution waveform data provided by distribution-level PMUs deployed system. An improved model is proposed, which can continuously imitate randomness intermittence during...

Abstract In recent years, unmanned autonomous driving technology has attracted increasing attention from people, and become a research hotspot. Currently, the integration of strapdown inertial navigation system (SINS) global satellite systems (GNSSs) is most common effective positioning scheme for ground vehicles (UGVs) aerial vehicles. However, this integrated unable to maintain reliable solution in challenging environments due inherent weakness GNSS signals accumulation SINS errors over...

Abstract Doppler velocity log (DVL) is usually employed to suppress the divergency of Strapdown Inertial Navigation System (SINS) in underwater navigation, which not concealable due high transmittance for acoustic wave water. To conduct navigation task with concealment, a differential laser velocimeter (LDV) working at water track mode integrated SINS this paper. The developed LDV measures advance carrier respect surrounding scenario advantages real-time performance, update rate, light...

Surface acoustic wave (SAW) devices using embedded interdigital transducers (IDTs) on an AlN/diamond/Si layered substrate are fabricated, and their performances investigated. The Sezawa mode is the dominant resonance with highest resonant frequency up to 17.7 GHz, a signal amplitude of 20 dB, electromechanical coupling coefficient 0.92%. Comparing these SAW those having conventional IDTs same structure, output power improved by 10.7% 1.1%, respectively, for IDT devices. This because...

In the field of land navigation, a laser Doppler velocimeter (LDV) can be used to provide velocity vehicle for an integrated navigation system with strapdown inertial system. order suppress influence jolts on one-dimensional (1D) LDV, this paper designs split-reuse two-dimensional (2D) LDV. The is made up two 1D probes that are mirror-mounted. By different effects vertical vibration probes, calculate forward and vehicle. results vehicle-integrated experiments show 2D LDV not only actually...

In the land navigation field, a laser Doppler velocimeter (LDV), which is able to measure speed of carrier, can be combined with strapdown inertial system (SINS) form an integrated system. To realize positioning free motion carrier on ground accurately, this paper introduces split-reuse three-dimensional (3D) LDV. For error parameters during application, Kalman filtering calibration method assistance differential global (DGPS) put forward in paper. Two groups experiments are designed...

As the proportion of air-conditioning load in total power increases year by year, meteorological factors such as temperature and humidity have more significant influences on fluctuations. Power fluctuations often lag behind changes factors, which difficulty short-term forecasting. This paper proposes an equivalent model based heat island effect, improved hourly air cumulative effect. improves population initial value generation method traditional genetic algorithm to improve algorithm's...

Abstract The integration of strapdown inertial navigation system (SINS) and laser Doppler velocimeter (LDV) is a reliable technology for land vehicle positioning. To ensure the best positioning performance SINS/LDV integrated system, it necessary to calibrate accurately. However, accuracy error model traditional calibration method seriously affected by large misalignment angle, which in turn affects consistency filtering, eventually leads decline accuracy. Therefore, this paper introduces...

A two-step method–-wavelet transform followed by Radon transform–- is proposed for pavement distress classification. First, a image decomposed into different frequency subbands wavelet transform. Distress transformed the high-amplitude coefficients, which are referred to as details, in high-frequency subbands. The modulus calculated combining horizontal, vertical, and diagonal details. Since distress, especially crack, has dominant orientations both space domain domain, then applied cracks...

With ultra-high velocity measurement accuracy, laser Doppler velocimeter (LDV) is promising to replace the odometer provide vehicle information in process of land integrated navigation. This paper investigates fast in-motion initial alignment for LDV-aided strapdown inertial navigation system (SINS). Aiming at problem that installation misalignment angles and scale factor error LDV will reduce accuracy speed, a Robust Double Gain Square-Root Unscented Quaternion Estimator (RDGSR-USQUE)...

In the integrated navigation system, which consists of a laser Doppler velocimeter (LDV) and strapdown inertial it is necessary to calibrate LDV. We propose an online calibration method for LDV based on system. This system uses highly accurate output information in early stage carry out coarse then employs Kalman filter correct results achieve high precision velocimeter. Experimental show that relative distance error dead reckoning less than 0.02%, indicating proposed can high-precision

As the final stage of power system restoration, critical task load restoration is to restore remaining as quickly possible. With continuous increase temperature-controlled and proportion electric vehicle in urban grid, complexity side process gradually increases. Therefore, based on existing grid environment, this paper considers sudden recovery caused by cold pick-up auxiliary effect discharge during process. From perspective economy, safety, speed, establishes a multi-objective function...

The integration of strapdown inertial navigation system (SINS) with a laser Doppler velocimeter (LDV) has been proven to be reliable technique for land vehicle localization. To enhance the positioning accuracy SINS/LDV integrated system, accurate calibration is essential. Hence, this article proposes robust position observation-based method system. In method, process partitioned into two phases: coarse and fine calibration. phase, an analytical adopted, in Kalman filter first designed obtain...

Abstract In order to reduce the requirement of system bandwidth Laser Doppler Velocimeter (LDV), a Dual-Doppler signal mixing LDV is proposed in this paper. By transmitting two beams moving surface, signals are acquired and subsequently mixed obtain difference frequency signal. The measured speed can be calculated based on This novel structure significantly reduces requirements system, which further diminished by minimizing angle between emitted light. Moreover, it exhibits enhanced...

With the advantages of high velocity measurement accuracy and fast dynamic response, laser Doppler velocimeter (LDV) is expected to replace odometer be combined with a strapdown inertial navigation system (SINS) form higher precision integrated system. However, LDV scale factor error misalignment angles between unit will affect navigation. Considering that not all global satellite (GNSS) receivers can directly provide information current mainstream calibration methods are sensitive noise...

To reduce the random error of output data a laser Doppler velocimeter (LDV) and improve its measurement accuracy, new method to filter drift LDV is proposed: metabolic time-series-grey model that combines time-series with grey model. The basic principle first introduced. Then, applied an compared variance analysis Allan are used analyze before after being modeled filtered. results show can effectively in real time greatly filtering effect outperforms

In order to provide accurate altitude information autonomously for land navigation, a self-developed one-dimensional reference-beam laser Doppler velocimeter (1D LDV) with light weight, small volume, and low cost is integrated strapdown inertial navigation system (SINS). The velocity sensed by the 1D LDV output SINS are fused dead reckoning algorithm. Dynamic vehicle tests carried out in an urban area difference of 28 m mountainous 1363 m. horizontal positioning error 10.8 0.5 45.9 3.6 area....

Cognitive radio sensor networks (CRSN) have the potential to vastly improve spectrum utilization among heterogeneous applications for smart grid. To date, there has been little queueing theoretic modeling conducted of such systems that provide a quantitative estimate benefits from CRSN. We propose novel queuing model which incorporates service rate and functional heterogeneity on servers implement preemptive priority varying classes. Initially, we present continuous-time Markov chain...