Abstract.To address the problems of traditional water quality detection, such as reliance on manual sampling, long detection cycles, and insufficient real-time monitoring capability, a multi-parameter online water quality detection system based on the STM32F103C8T6 microcontroller is designed. The system integrates a DS18B20 temperature sensor, a turbidity sensor, and a pH detection module, together with an OLED local display module and an ESP8266 wireless communication unit, to realize real-time multi-parameter acquisition of water temperature, turbidity, and pH value. The alarm thresholds can be … Read more →

Abstract.Time-interleaved analog-to-digital converters (TIADCs) increase the aggregate sampling rate by distributing conversion across several lower-rate channels. However, differences in channel offset, gain, and sampling instant introduce periodic spurs and limit the dynamic performance obtainable from interleaving. This review examines the mechanisms of individual and combined mismatches and traces the development of calibration from foreground parameter identification to background adaptation, digital reconstruction, and all-digital joint compensation. Statistical estimation, correlation-based … Read more →

Abstract.Facing the severe challenges of global warming and the deterioration of the ecological environment, "carbon peaking" and "carbon neutrality" have become the common goals pursued by the international community. China has responded actively to this by formulating a strategic plan to achieve carbon peaking by 2030 and carbon neutrality by 2060, aiming to promote the optimization of the energy structure and the improvement of energy efficiency. Under this grand goal, new energy, as an important clean and renewable energy source, plays a crucial role in this process. However, due to the … Read more →

Abstract.Aiming at the engineering problems of current single evaluation of underground coal mine hydraulic fracturing effect, low quantification accuracy, lack of multi-dimensional coupling evaluation, which makes it difficult to accurately characterize the comprehensive effects of fracturing crack creation, pressure relief and permeability enhancement, this paper systematically sorts out the existing fracturing effect monitoring and evaluation technology system, and summarizes the technical characteristics and applicable scenarios of each evaluation method. Combined with different engineering … Read more →

Abstract.To address class imbalance in spectrum-based fault diagnosis of electrical submersible pumps, a graph regularized weighted extreme learning machine is developed. Fixed features are obtained using random wavelet kernels and kernel group selection. The reciprocal of class frequency is used as the sample weight to balance the contributions of different classes to the supervised error. A graph Laplacian regularization term based on same-class neighbors is introduced to constrain the consistency of local predictions. The output weights are then obtained by solving a system of linear equations. … Read more →

Abstract.With the rapid development of the hydrogen energy industry, hydrogen storage pipelines—as critical infrastructure for large-scale hydrogen transportation—have drawn widespread attention regarding their safe operation. This paper focuses on the current state of development in hydrogen storage pipeline leak monitoring technology. It provides a systematic review of the mechanisms of leak formation, diffusion patterns, and leak signal characteristics. The paper summarizes leak detection and localization technologies based on fluid parameters, acoustics, optics, and sensors, with a particular … Read more →

Abstract.In recent years, with the rapid development of the automotive industry toward intelligence, connectivity, and electrification, automotive chips, as the core carriers for implementing related functions, have seen continuously rising computing power demands, while architecture openness and autonomous controllability have also gained increasing attention. Against this backdrop, RISC-V technology, based on an open instruction set architecture, offers a new development path for the automotive chip industry through its modularity, extensibility, and autonomous controllability. However, when entering … Read more →

Abstract.Spindle coupled road simulation is an essential bench technique for chassis durability verification. For vehicles equipped with CDC shock absorber, most existing bench tests adopt constant amplitude fixed current excitation, which cannot reproduce the time varying solenoid valve current measured on real roads, resulting in non-negligible load and fatigue-damage reproduction deviation. To quantify such errors, this paper implements real vehicle dynamic CDC shock absorber current synchronous playback based on self-developed current playback hardware on an MTS 329 LT spindle coupled test bench. … Read more →

Abstract.Mobile embodied intelligent agents, as a product of the deep integration of embodied intelligence and mobile platforms, are moving from laboratories to open scenarios such as logistics, inspection, and household services. However, their attributes of "mobility + openness + wireless + physical execution" simultaneously amplify cyber security risks. Taking "robots—cyber security—standards" as the thread, this paper systematically tracks the cyber security standardization process of mobile embodied intelligent agents at home and abroad: it sorts out international governance frameworks including … Read more →

Abstract.Short-horizon cluster-delay prediction must balance fluctuation suppression against responsiveness while accommodating newly observed clusters. We investigate a scalar local-level Kalman predictor that summarizes past observations recursively instead of requiring a fixed-length input window. Training-only trajectory validation selects its process-to-residual variance ratio; prediction precedes each observation update, and evaluation includes segment startup. Existing NYUSIM trajectories support direction holdouts, speed transfer, and a supplementary configuration-transfer evaluation with … Read more →

Abstract.Black soldier fly larvae (BSFL) bioconversion is considered a promising approach for the harmless treatment and resource utilization of livestock manure. In this study, chicken manure and its residues after BSFL bioconversion and secondary composting were investigated to evaluate changes in potential pathogens and antibiotic resistance-related functions using high-throughput sequencing-based analysis. A total of 12 potential pathogenic species were detected throughout the treatment process. Chicken manure (CM) showed the highest abundance of potential pathogens, with Escherichia coli being … Read more →

Abstract.Natural fractures may dominate fluid transport in tight sandstones, carbonates, shales, volcanic rocks, and basement reservoirs despite contributing little bulk porosity. Their electrical signatures are nevertheless non-unique because lithology, fluid salinity, saturation, mud invasion, borehole geometry, and tool sensitivity can reproduce or obscure fracture-related anomalies. This narrative critical review, informed by structured literature searches, links fracture-scale conduction to the responses of conventional resistivity, dual laterolog, multicomponent induction, and electrical borehole … Read more →

Abstract.A bio-sand filter was used to investigate the effects of influent substrate concentration (NH4+-N and NO2--N) on the performance of anaerobic ammonium oxidation (anammox), and a nitrogen removal kinetic model for anammox was developed. At a constant hydraulic loading rate of 1.0 m/d and an influent NO2--N/NH4+-N concentration ratio of 1.3, along-the-column water quality analysis showed that the apparent removal rate constants of both NH4+-N and NO2--N decreased with increasing influent substrate concentration, indicating that the substrate mass-transfer driving force was relatively sufficient … Read more →

Abstract.The sedimentary environment is a crucial geological factor influencing the formation, development and enrichment of oil and gas reservoirs. The composition, sedimentary structures and spatial distribution characteristics of sediments vary significantly in different sedimentary environments, which have significant impacts on reservoir properties and oil and gas accumulation. This paper adopts a method combining literature review and theoretical analysis to systematically expound the basic characteristics of sedimentary environment and oil and gas reservoirs, focusing on analyzing the effects of … Read more →