Recovery Method Research Articles

TransWild: Enhancing 3D interacting hands recovery in the wild with IoU-guided Transformer

The recovery of 3D interacting hands meshes in the wild (ITW) is crucial for 3D full-body mesh reconstruction, especially when limited 3D annotations are available. The recent ITW interacting hands recovery method brings two hands to a shared 2D scale space and achieves effective learning of ITW datasets. However, they lack the deep exploitation of the intrinsic interaction dynamics of hands. In this work, we propose TransWild, a novel framework for 3D interactive hand mesh recovery that leverages a weight-shared Intersection-of-Union (IoU) guided Transformer for feature interaction. Based on harmonizing ITW and MoCap datasets within a unified 2D scale space, our hand feature interaction mechanism powered by an IoU-guided Transformer enables a more accurate estimation of interacting hands. This innovation stems from the observation that hand detection yields valuable IoU of two hands bounding box, therefore, an IOU-guided Transformer can significantly enrich the Transformer’s ability to decode and integrate these insights into the interactive hand recovery process. To ensure consistent training outcomes, we have developed a strategy for training with augmented ground truth bounding boxes to address inherent variability. Quantitative evaluations across two prominent benchmarks for 3D interacting hands underscore our method’s superior performance. The code will be released after acceptance.

A Dynamic and Static Combined State Recovery Method Against FDI Attacks in Power Grids

A Dynamic and Static Combined State Recovery Method Against FDI Attacks in Power Grids

Dissolution of metals in NCM622 cathode through the Dissimilatory process with Na-lactate by Shewanella putrefaciens

Objectives:The objective of this study is to confirm the possibility of reduction and consequent dissolution of Li, Ni, Co, and Mn from NCM622 cathodes in spent Li-ion batteries through the anaerobic respiration with Na-lactate by Shewanella putrefaciens.Methods:The method involves using anaerobic microbial respiration to mimic dissimilatory metal oxide reduction, allowing metals to be leached from NCM622 cathodes (LiNi0.6Co0.2Mn0.2O2) under near-neutral pH conditions (~7.5).Results and Discussion:The results show that approximately 26 wt% of the total Li, Ni, Co, and Mn were successfully leached into the solution within two weeks. This approach differs significantly from conventional acidic leaching processes, offering a more environmentally friendly and sustainable alternative. In addition, we provide quantitative information regarding the dissolution of NCM622 when it is exposed in environmental systems.Conclusion:In conclusion, microbial-based metal leaching presents a novel, sustainable pathway for recovering metals from spent Li-ion batteries, addressing environmental concerns and reducing dependence on traditional energy-intensive recovery methods.

The achilles tendon rupture: A deeper dive into its impact on professional and high-performance athletes

Background: The Achilles tendon rupture (ATR) is an injury that has been detrimental to professional athletes over the years, recently rising to unforeseen heights as the intensity of sports has increased. Methods: To obtain relevant statistics for this paper, a review of prior research, including original research and case studies, was conducted. Digital publications and clinical data were reviewed to dissect factors such as injury causes, operations, current initiatives, the role of technology, and future implications. Results: The data revealed a significant increase in documented ATRs in athletes and the National Football League (NFL) over the years; most recently, these injuries increased from 11 in the 2019-2020 season to 24 in the 2021-2022 season.3 Despite advancements in technology and recovery methods, dynamic changes involving training, conditioning, physicality, and intensity in sports have greatly contributed to the increased rates of injuries. With modernized resources such as advanced testing and rehabilitation procedures incorporating artificial intelligence (AI), specialists continue to search for new ways to treat injury and improve functional outcomes more effectively. Conclusion: This paper examines ATRs in athletes, its risk factors, current surgical methods for treatment, and modern rehabilitation methods. Future research should continue to develop comprehensive assessment and treatment methods to decrease the time to return to play, reduce the risk of re-injuries, and ensure cost-effective standards in implementing advanced rehabilitation modalities.

Optimization of extraction for efficient recovery of kenaf seed protein isolates: evaluation of physicochemical and techno-functional characteristics.

Kenaf seeds are a rich source of protein; however, finding the best extraction method is crucial to obtaining high-quality protein from these underutilized seeds. This research devised an optimized extraction process for best recovery of kenaf seeds protein using response surface methodology. The key parameters affecting the yield and protein content were optimized, including extraction pH (2-11), seed:water ratio (5:1-50:1), temperature (30-90 °C), and duration (20-360 min). The physicochemical and techno-functional properties of kenaf seed protein isolates (KSPIs) were examined. A maximum protein yield of 12.05 g/100 g with purity level 91.94 g/100 g was obtained using an optimized extraction with pH 11.0, seed:water ratio 50:1, 360 min duration, and temperature 50 °C. The oil and water retention capacities of KSPI were 1.14 mL g-1 and 1.37 mL g-1 respectively. After 30 min at pH 7, KSPIs demonstrated remarkable emulsion capacity (83.12%) and stability (75.63%), along with high foaming capacity (106%) and stability (18.3%). As per high-performance liquid chromatography analysis, arginine, glutamic acid, leucine, phenylalanine, and lysine were the most abundant amino acids detected in KPSIs. The KSPIs' globular protein structure was successfully verified using analytical approaches, including Fourier transform infrared spectroscopy, protein fraction ratios, and differential scanning calorimetry. Sodium dodecyl sulfate polyacrylamide gel electrophoresis analysis revealed that KPSI has a molecular weight distribution ranging from 10 kDa to 50 kDa. The results of this study support the application of the proposed response-surface-methodology-optimized extraction method for efficient recovery of high-quality kenaf seed proteins that meet the necessary physicochemical and techno-functional requirements. © 2024 Society of Chemical Industry.

Precise regulation of layered-to-rock structure of spent Li-ion cathodes achieving ultrahigh lithium recovery rate

With the rapid development of electric vehicles and digital devices, the accumulated spent lithium-ion batteries (LIBs) cause severe anxiety about lithium resources and environmental safety. However, the low capture rate of Li+ and the high chemical consumption of the existing recovery methods lead to high Li loss, treatment costs and disposal fees. Herein, we propose a universal strategy of spent LIBs recovery via precise directional regulating structures (from layered to rock) to achieve ultrahigh lithium recovery rate with super-low chemical and energy consumption. Experimental characterization and theoretical calculations reveal the dissociation of structure, reorganization of Li–O bonds and phase transformation of the cathode materials in the limited-domain reduction process, realizing the complete recovery of Li+ without consuming acid leaching agent. This process realizes an extra-high Li separation index (19154) and extra-long cycle half-life (173 cycles) which are far superior to those of traditional methods (9–191 and 7 cycles). Besides, ecological and economic analysis shows that the consumptions of chemicals and energy are only 9 % and 9.7 % those of the existing literature, respectively, providing a bright pathway for industrializable lithium batteries recycling.

Strategies for Hydrocarbon Removal and Bioleaching-Driven Metal Recovery from Oil Sand Tailings

Oil sand tailings from bitumen extraction contain various contaminants, including polycyclic aromatic hydrocarbons, BTEX, and naphthenic acids, which can leak into surrounding environments, threatening aquatic ecosystems and human health. These tailings also contribute to environmental issues such as habitat disruption and greenhouse gas emissions. Despite these challenges, oil sand tailings hold significant potential for waste-to-resource recovery as they contain valuable minerals like rare earth elements (REEs), titanium, nickel, and vanadium. Traditional metal extraction methods are environmentally damaging, requiring high energy inputs and generating dust and harmful emissions. Furthermore, the coating of hydrocarbons on mineral surfaces presents an additional challenge, as it can inhibit the efficiency of metal extraction processes by blocking access to the minerals. This highlights the need for alternative, eco-friendly approaches. Bioleaching, which uses microorganisms to extract metals, emerges as a sustainable solution to unlock the valuable metals within oil sand tailings. This review discusses the minerals found in oil sand tailings, the challenges associated with their extraction, methods from hydrocarbon removal from minerals, and bioleaching as a potential metal recovery method.

Oil recovery and cooling for underground salt cavern oil storage: Insights from coupled flow and thermal model

Petroleum reserve in salt caverns is paying more attention to oil cooling to prevent dissolved gas release from heated crude oil. This work introduced a method for oil recovery in conjunction with cooling, along with a matching flow and heat transfer model taking changes in crude oil thermophysical parameters into consideration. An average error of 3.43% was observed between the model results and filed monitoring data. It was found that after being cooled by the heat exchanger, the temperature of extracted crude oil drops from 39.5 °C to 26.8 °C, demonstrating the effectiveness of this approach for oil cooling. Sensitivity analysis indicates that the season is the primary determining factor for the cooling efficacy of crude oil. Even worse, cooling will be useless when the ambient temperature exceeds 35 °C. However, increasing brine temperature will reduce the surface pumping pressure from 7.60 MPa to 5.17 MPa, with a decrease of up to 31.97%. A special focus was given to the brine injection rate, which seemed to have less impact on the cooling efficiency but became more significant in the pressure profile. In addition to providing further insights into the flow and thermal performance of strategic petroleum reserves in the salt cavern, this study could also be a powerful tool for determining the best process parameters to ensure the delivery temperature of crude oil and the stability of the salt cavern.

Push Recovery of a Biped in Different Stance Scenarios

Abstract Push recovery of a biped robot is challenging because of the complexity of biped locomotion contributed by its constraints. The present work proposes a novel optimized control methodology for push recovery against external disturbances utilizing “Centroidal Momentum” and “Momentum Jacobian Matrix” (MJM). The novelty of this work lies in the optimization framework of the control problem that includes an eigenanalysis of MJM. The optimization considers various constraints associated with the biped locomotion while minimizing the necessary cost function. Successful push recoveries of a biped from different stance scenarios (single leg stance, double leg stance, double leg stance at different heights) are demonstrated using the unique methodology proposed in this work. Such a unique methodology using eigenanalysis of MJM for push recovery under diverse stance scenarios has yet to be described in the literature. The balance stability of the robot after being pushed is evaluated by its Center of Mass (CoM) motion and Zero Moment Point (ZMP) criteria. It is also demonstrated that the proposed methodology in the present work can recover a biped from a greater impulse force normalized by biped weight compared to other existing push recovery methods. A new term called “Effective Disturbance Ratio” (EDR) is introduced to perform this comparison.

Development of conductive fingermarks for forensic applications.

Fingermarks are an important form of evidence in forensic science, routinely used for identification or exclusion purposes within the criminal justice system. The increasing use of fingerprint recognition in technology and biosecurity, such as for unlocking devices and accessing banking information, highlights the need for forensic fingermark recovery methods that serve both traditional forensic needs and modern technological demands. Current fingerprint development techniques, however, are not designed to fulfil this dual-purpose. This paper presents a novel approach that introduces the use of conductive paint and silicone to develop, recover, and preserve latent, patent, and plastic fingermarks. The innovative method produces conductive casts that capture detailed ridge patterns, thereby facilitating forensic examination as well as being used for unlocking capacitive and ultrasonic fingerprint scanners in a range of mobile devices.

High order recovery of geometric interfaces from cell-average data

We consider the problem of recovering multivariate characteristic functions u := χΩ from cell-average data on a coarse grid, motivated in particular by the accurate treatment of interfaces in finite volume schemes. While linear recovery methods are known to perform poorly, nonlinear strategies based on local reconstructions of the jump interface Γ := ∂Ω by geometrically simpler interfaces may offer significant improvements. We study two main families of local reconstruction schemes the first one based on nonlinear least-squares fitting, the second one based on the explicit computation of a polynomial-shaped curve fitting the data, which yields simpler numerical computations and high order geometric fitting. For each of them, we derive a general theoretical framework which allows us to control the recovery error by the error of best approximation up to a fixed multiplicative constant. Numerical tests in 2d illustrate the expected approximation order of these strategies. Several extensions are discussed, in particular the treatment of piecewise smooth interfaces with corners.

Investigation of drive mechanisms in fractured oil reservoirs with tight matrix: a case study of an Iranian reservoir

ABSTRACT Tight matrix oil reservoirs pose significant challenges for oil recovery due to their low permeability and intricate fracture networks. Effective reservoir development strategies require a thorough understanding of the recovery mechanisms; otherwise, it is difficult to maximize production rates and optimize the oil recovery factor. The reservoir examined in this study contains black oil within a tight matrix, complicating the planning and selection of appropriate recovery methods. Despite strong bottom water influence and high water-cut issues, the fractures in the reservoir facilitate economical extraction. However, the reservoir’s complexity, coupled with limited knowledge and experience in this area, further complicates recovery efforts. In this study, we investigated the multi-mechanistic flow dynamics within the porous media. Simulation results indicate that during the first month of production, the dominant recovery mechanism is rock expansion drive. Beyond this period, the water drive mechanism prevails. Over a ten-year period, oil recovery is distributed as follows: 13.1% from bottom water drive, 1.0% from gas cap drive, 0.2% from rock expansion, and 0.6% from oil expansion drive.

Research on the recovery method of disrupted flights considering passenger transfer and cancellation costs

Research on the recovery method of disrupted flights considering passenger transfer and cancellation costs

A novel recovery controllability method on temporal networks via temporal lost link prediction

Abstract Temporal networks are essential in representing systems where interactions between elements evolve over time. A crucial aspect of these networks is their controllability the ability to guide the network to a desired state through a set of control inputs. However, as these networks evolve, links between nodes can be lost due to various reasons, such as network failures, disruptions, or attacks. The loss of these links can severely impair the network’s controllability, making it challenging to recover desired network functions. In this paper, while investigating the destructive effects of various attacks on controllability processes in temporal networks, a new controllability recovery method is proposed, in which it prevents disruptions in this type of network processes by predicting lost links. In the proposed method, using network embedding and feature extraction, the dissimilarity of the nodes is calculated and then the missing links are predicted by designing a neural network. The results of the implementation of the proposed method on the datasets have demonstrates that the proposed method performed better than other conventional methods.

Spatial Distribution, Leaching Characteristics, and Ecological and Health Risk Assessment of Potential Toxic Elements in a Typical Open-Pit Iron Mine Along the Yangzi River

Potential toxic elements (PTEs) pollution in the soil of abandoned open-pit mines can lead to great ecological risk to the areas around the mining districts. This study selected a typical abandoned open-pit iron mine along the Yangzi River in southeast China to investigate the spatial distribution, leaching characteristics, and ecological and health risk of the soil PTEs (As, Pb, Cd, Ni, Cr, Cu, and Zn). Leaching tests and sequential extraction were applied to study the migration of PTEs under the condition of rainfall. Different risk assessment methods were used to analyze the pollution and ecological risk of PTEs. The contents of As and Cu exceeded the background value of the Chinese soil guideline, with average contents of 50.71 ± 1.59 and 197.47 ± 16.09, respectively. The leaching test and sequential extraction indicated that sites 8 and 9 posed the greatest risk of PTE migration. According to the map of the Nemerow integrated pollution index (NIPI), the pollution level of the middle bare area of the study area was the highest, and Cu possessed the highest pollution index (PI) of 3.92. The average geo-accumulation index (Igeo) of As and Cu was between 1 and 2, reaching the pollution level of moderately contaminated. The average potential ecological risk coefficient (Ei) of As was the highest, and the contributions of As, Cu, and Cd to the potential ecological risk of the whole study area were 46.7%, 29.7%, and 14.3%, respectively. The range of the hazard index (HI) and the range of the As carcinogenic risk (CRAs) of all the sampling sites for children were 1.30–3.94 and 2.19 × 10−4–7.20 × 10−4, and As accounted for more than 85% of the total noncarcinogenic risk, indicating that the comprehensive pollution of PTEs in the study area posed great carcinogenic and noncarcinogenic risks to children. This study can be a proper reference for the subsequent recovery methods and environmental management of the whole mining area.

Capacitive lithium capture system using a mixed LiMn2O4 and LiAlO2 material

The increasing demand for lithium (Li), a crucial material in various industries, requires efficient recovery methods and a shift toward a circular economy. This study investigates a fast, eco-friendly technique for selective Li recovery, emphasizing the use of innovative materials from spent Li-ion batteries (SLiBs), particularly LiMn2O4(LMO)/LiAlO2(LAO)-based materials, to enhance Li's circular economy. Conventional Li recovery methods typically involve prolonged processes with chemical additives and environmental concerns, whereas electrochemical systems like membrane-based capacitive deionization (MCDI) offer promising high removal capacities, regeneration ability, and scalability. However, no commercial electrochemical Li recovery system underscores the need for continued research to improve their performance. This study employs MCDI for selective Li recovery, examining various electrode materials, including commercial activated carbon, LMO-based electrodes, and modified LMO/LAO-based electrodes. The mixed LiMn2O4/LiAlO2 cathode exhibited high selectivity for Li+ extraction with a recovery efficiency of 83.1 %, achieving a deionization capacity of 38.15 mg/g at 1.0 V under an initial feed concentration of 5 mM LiCl. The Li+ adsorption reached 900 μmol/g, with a separation factor (αMg2+Li+) of 3.77 (CMg2+/CLi+ = 1), setting a robust foundation for a comprehensive Li recovery framework that meets the increasing Li demand while minimizing environmental impact.

Ultrasonic-Assisted Synthesis of Lead Citrate as Precursor for Preparation of Lead Oxide from Lead Sulfate

ABSTRACT In this study, an efficient method of lead recovery from lead sulfate in spent lead-acid batteries assisted by ultrasonic is developed using the citric acid–sodium citrate solution. Ultrasonic-assisted technology is employed to enhance the kinetics of lead sulfate leaching. Initially, the predominance area of the lead citrate complexes was analyzed. The study was conducted to evaluate the effect of ultrasonic-assisted technology on the kinetic behavior of lead sulfate within the citric acid–sodium citrate solution, thereby unveiling the differences between ultrasonic-assisted leaching and the non-ultrasonic-assisted leaching. Kinetic study indicated that the employment of ultrasonic-assisted technology could effectively reduce the apparent activation energy during the desulfurization process, decreasing the energy initially required from 43.27 kJ/mol to 35.15 kJ/mol. Furthermore, the ultrasonic-assisted leaching led to successful preparation of lead citrate precursor, characterized by a smaller particle size and larger specific surface area. Systematic investigations were performed on the thermal decomposition process of these precursors and the effects of calcination temperature and holding time on the properties of calcination products. It was revealed that pure porous lead oxide powder with a purity of 99.9% could be produced successfully under the conditions of calcination temperature at 350°C and holding time of 1 h. The research provides an innovative process for the efficient recovery of lead from spent lead acid batteries.

Detection of circulating tumor cells in patients with lung cancer using a rare cell sorter: a pilot study

BackgroundWe developed a Rare Cell Sorter (RCS) for collecting single cell including circulating tumor cells (CTCs). This single-institution pilot study evaluated the ability of this device to detect tumor-like cells in patients with lung cancer and confirmed their genuineness based on the epidermal growth factor receptor (EGFR) mutation concordance with tissue samples.MethodsThis study included patients treated for lung cancer from September 2021 to August 2022 in University of Tsukuba Hospital. Peripheral blood samples were obtained before surgery or during periodic medical checks for patients treated with drugs. We used the RCS to capture cells based on size. The cells were stained, and the Hoechst-positive, CD45-negative, and epithelial celladhesion molecule (EpCAM)- positive cells were defined as CTCs, were collected. The presumptive CTCs were counted and tested using digital droplet polymerase chain reaction for EGFR mutations and compared with the tissue EGFR status to check concordance.ResultsEighteen patients were included in this study and CTCs were detected in 6 patients (33%). The CTCs from three patients showed EGFR mutation, and the EGFR mutation status of CTCs concorded with that of tissue samples in 83% of the cases (5/6). Only one CTC showed a different status from the tissue, and the concordance rate of EGFR status between CTCs and the tissue was 96% (24/25).ConclusionThe ability of the RCS to detect CTCs in patients with lung cancer was demonstrated based on the concordance of EGFR status in this pilot study. This novel hybrid method of CTC recovery using the RCS has the potential to recover a wide range of CTCs regardless of EpCAM. Further validation through a large-scale study is needed.

A coupled displacement-pressure model for elastic waves induce fluid flow in mature sandstone reservoirs

Elastic (seismic) wave stimulation is considered one of the unconventional enhanced oil recovery (EOR) methods. Increasing water quantity in the high permeability layer of a mature oil reservoir is highly challenging and can significantly decrease the ultimate recovery due to the reservoir heterogeneity. Using seismic waves can be considered low-cost, environmentally friendly, and illuminates the entire reservoir size compared to conventional EOR methods. A numerical model is developed by extending the Quintal approach for seismic attenuation due to wave-induced fluid flow (WIFF) to incorporate capillary pressure in partially saturated porous media and shift undrained boundary conditions to exclude external flow stress for drained boundary conditions. Therefore, the fluid distribution due to the capillary effect makes the developed finite element method (FEM) u-p model more widely applicable for oil recovery in mature reservoirs. A two-layer partially saturated media was subjected to compressive seismic stress at low frequency (3 Hz). The results indicated that the vertical displacement gradients of the bottom and upper layers decline with excitation time for both fully and partially saturated media. On the other hand, partially saturated pore pressure gradients of both the upper and bottom layers have higher amplitudes with excitation time than fully saturated pore pressure gradients due to the influence of capillar pressure. The cumulative crossflow oil volume for 180 days of continuous stimulation was 1176 bbl, 1032 bbl, and 648 bbl in low permeability layers: 200 md, 100 md, and 50 md, respectively. Therefore, the developed model has the potential for field-scale EOR applications. The study also suggests coupling elastic EOR with CO2 flooding to recover more oil due to increasing fluid mobility and relative permeability to oil in low-permeability reservoirs or tight formations.

A feasible clinical pathway of severe pyoderma gangrenosum in burn centers based on three clinical cases

ObjectiveTo establish a standardized clinical pathway for the management of severe pyoderma gangrenosum (PG) in burn centers by analyzing and integrating insights from three detailed case studies. Methods and materialsFirst, we sum up experiences about identification and recovery methods for acute and chronic PG-induced wounds by analyzing the characteristics of emergent cases. Second, we analyzed the similarities and differences in the diagnosis and treatment of the clinical cases. Then, a clinical pathway was established by integrating the diagnosis and treatment characteristics of the three cases. ResultsA clinical pathway for severe PG management was developed for use in burn centers, which comprised: (1) Initial Assessment and Potential PG Identification Criteria, (2) Steps for Confirming a PG Diagnosis, (3) Treatment Protocol, and (4) Follow-up and Monitoring. ConclusionPG, as a rapidly progressing rare inflammatory skin disorder, is often misdiagnosed and treated inappropriately. The unpredictable course and the lack of standardized treatment protocols for PG makes its management challenging. The clinical pathway established in this study comprises a timely diagnostic process and optimizes treatment strategies, ultimately enhancing the quality of care for patients with PG. Future studies are needed to validate this pathway and explore its applicability in different clinical settings.