Handan Polytechnic College

In response to the urgent need for efficient and accurate dynamic grasping in automated logistics, this study proposes the VRCDS, a dynamic grasping system that integrates a multi-feature weighted PnP vision algorithm with multi-robot arm collaboration. The system establishes a closed-loop “perception-decision-execution-feedback” architecture, significantly enhancing grasping accuracy, system efficiency, and energy savings compared to traditional single-arm or visual servo schemes. Experimental results demonstrate that the VRCDS system achieves high recognition accuracy, robust grasping efficiency under various conveyor speeds, precise trajectory control, and a substantial reduction in power consumption. The research provides an efficient, precise, and reliable solution for dynamic grasping tasks in logistics automation.

Abstract The impact of corrosion on pharmaceutical glasses has received significant attention in the pharmaceutical industry. In this study, the evolution of chemical structure and nanomechanical properties of a commercial pharmaceutical borosilicate glass with a medium boron content was investigated upon static corrosion in sodium citrate solution, which has been widely used as stabilizers in modern pharmaceutical products. Experimental results reveal that the dissolution of glass network dominates the corrosion of the pharmaceutical glass during the initial corrosion, and nanomechanical properties of the pharmaceutical glass surface decrease firstly and then increase. As the corrosion time further extends, the ion‐exchange and Na ion in‐diffusion as well as the precipitation formation dominate the corrosion behavior, accompanied by a significant decrease in nanomechanical properties of glass surface. These findings and previously published works suggest that the nanomechanical properties of corroded pharmaceutical glass surfaces need more attention and it can reveal more information about the corrosion behavior of glass surface.

This paper outlines the design, fabrication, and performance evaluation of an affordable agricultural drone engineered to optimize the application of fertilizers and pesticides for small-scale farming operations. Traditional spraying methods present significant drawbacks, including farmer exposure to chemicals, excessive time consumption, and general inefficiency. Our proposed drone-based system utilizes a quadcopter platform with a manually controlled spraying mechanism. The modular design prioritizes both low cost and operational simplicity. Results from field evaluations demonstrated consistent spraying performance, stable flight characteristics, and considerable savings in labor and expenses. This project presents a viable step towards making precision agriculture more accessible, striking a balance between performance and affordability, especially for farming communities with constrained resources.

Poultry farming is a growing sector in Rwanda, but productivity remains constrained by high feed costs and limited adoption of modern feeding technologies such as pellet feeds. Pellet feeds have become increasingly popular in poultry production because they improve feed efficiency, reduce wastage, and support faster growth compared to mash feeds. In commercial systems, especially broiler production, adoption is very high. Studies indicate that over 90% of broiler diets worldwide are pelleted. Market data also show pellets make up around 40–45% of the global poultry feed market, with regional variations depending on production scale and infrastructure. This study employed a descriptive cross-sectional survey of 135 poultry farmers from the Northern and Eastern provinces, using structured questionnaires to collect data on sociodemographic characteristics, poultry management practices, and perceptions toward pellet feeds and pelleting machines. Results show that only 38.8% of farmers currently use pellet feeds, with barriers including misconceptions that pellets are for broilers only (32.4%), lack of availability for layers, limited knowledge, and high costs. Awareness that pellets can be used for layers was low (30.2%), yet willingness to adopt was high, with 93.1% expressing interest in increasing use and 98.3% willing to purchase an affordable small pelleting machine. Logistic regression further showed that layer rearers (AOR = 0.093, 95% CI: 0.026–0.334) and those unaware of pellet suitability (AOR = 0.085, 95% CI: 0.033–0.218) were less likely to use them compared to the broiler rearers and those who are aware of pellet suitability, respectively. These findings highlight critical knowledge and perception gaps that limit pellet feed adoption despite strong interest, suggesting that targeted farmer training, awareness campaigns, and improved access to affordable pelleting equipment are essential to enhance productivity and sustainability in Rwanda’s poultry sector

Many students do not demonstrate optimal mastery because EFI mate-rial is considered complex and abstract, while conventional learning using engine stands has limited accessibility outside school hours. This innovation is designed to create an immersive learning experience fo-cused on reinforcing foundational knowledge regarding the identifica-tion of components, functions, and the operational flow of the EFI sys-tem. The study employs a quantitative method with a quasi-experimental design of the Non-equivalent Control Group Design type. The research sample consisted of 80 students in the 11th grade of Light Vehicle Engineering, divided into an experimental group and a control group. Data were collected through pre-tests and post-tests, then ana-lysed using ANOVA with a significance level of α=0.05. The results of the study indicate that the use of AREFI media has a significant posi-tive impact on student learning outcomes. There was an increase in the average score from 44.73 in the pre-test to 70.92 in the post-test. The ANOVA test results showed an F value of 90.217 with a significance level of 0.000 (p < 0.05), proving that the difference in learning out-comes between the two groups was caused by the use of the AREFI media. Therefore, it can be concluded that the AREFI learning media has proven to be effective as an innovative solution for visualizing abstract EFI concepts, enhancing interaction, and facilitating deep un-derstanding among vocational high school students.

Reconfigurable Intelligent Surface (RIS) has gained significant attention as a potential solution to improve wireless communication by manipulating signal propagation. Spatial modulation (SM) techniques have been extensively used to boost spectral efficiency by leveraging antenna indices for data transmission. Receive spatial modulation (RSM) further simplifies receiver structures while improving system performance. Inspired by advancements in RIS-assisted communication systems, this paper introduces a novel RIS group number modulation assisted receive spatial modulation (RGNM-RSM) scheme. The proposed approach divides the RIS into multiple groups and modulates the number of activated RIS groups alongside selecting the receive antenna, leveraging information bits to maximize the instantaneous signal-to-noise ratio (SNR) at the destination. Two schemes, RGNM-RSSK and RGNM-RSM, are developed, with the latter incorporating M-ary modulation for additional data transmission. Monte Carlo simulations proved that the RGNMRSM scheme outperform others in terms of the performance of the average bit error probability (ABEP) and the spectral efficiency. The findings highlight the potential of RGNM-RSM in achieving reliable and efficient wireless communication.

Abstract Airflow spinning involves a polymer nanocomposite solution composed of nanoparticles and a polymer solution extruded through spray holes and then blown and finely deposited by a high‐speed gas jet onto a mesh curtain to form a composite fiber material. It is widely used in various fields owing to its high efficiency. To investigate the effect of the nanoparticles on the fibers, online high‐speed camera observations were used to capture the dynamics of the liquid jets (liquid jets online and fibers when deposited on the mesh curtain) in the nozzle exit region after the addition of nanoparticles. Because the initiation and propagation of a liquid jet are three‐dimensional processes, two orthogonal planes that can provide a large amount of information regarding the motion of fiber particles were selected for observation in this study. The results indicated that the difference between the liquid‐jet diameters observed in the two planes was approximately within 20 μm. The nanoparticles accelerate the decay of the liquid‐jet diameter to different extents. Moreover, it increases the probability of defects such as shots. Additionally, we studied the effects of different nanoparticle sizes and concentrations on liquid‐jet dynamics. A new explanation for shot formation was proposed. The findings of this study provide valuable insights into the three‐phase flow in the field of spinning and a solid experimental foundation for the development of composite fibers.Highlights The diameter of the liquid jet differs by 10–20 microns in two planes. First study of three‐phase flow with nanoparticles in air spinning. Explained “shots” formation through experiments and simulations.