Leveraging seawater toilet flushing system in Hong Kong,China,a Seawater-based Urine Phosphorus Recovery(SUPR)process that integrates ureolysis and phosphorus(P)recovery was proposed in our earlier *** this study,a th...
详细信息
Leveraging seawater toilet flushing system in Hong Kong,China,a Seawater-based Urine Phosphorus Recovery(SUPR)process that integrates ureolysis and phosphorus(P)recovery was proposed in our earlier *** this study,a thermodynamic model was applied to evaluate the effects of ureolysis and the seawater-to-urine mixing ratio(S/U ratio)on P precipitation in the SUPR *** results suggested that effective P recovery was thermodynamically feasible across a wide range of S/U ratios,with elevated pH levels resulting from ureolysis being critical for P ***,a SUPR reactor was developed to validate this *** the hydraulic retention time(HRT)exceeded 3 h and the S/U ratio was lower than 3:1,more than 98%of P could be recovered without urine storage,chemical dosage,or external *** decrease in the HRT and increase in S/U ratio caused flushing out of fine precipitates,resulting in a relatively low P recovery ***,this could be advantageous when downstream urine nitrification is implemented,as dilution of urine can alleviate the inhibitory effects of free ammonia and free nitrous acid,as well as overcome the P limitation problem,thus facilitating urine ***,there is a trade-off between optimizing P recovery and nitrification efficiencies.
Improving the catalytic efficiency and anti-poisoning ability of Pt-based catalysts is very critical in methanol electrolysis technology for high-purity hydrogen ***,the nitrogen-doped carbon polyhedrons-encapsulated ...
详细信息
Improving the catalytic efficiency and anti-poisoning ability of Pt-based catalysts is very critical in methanol electrolysis technology for high-purity hydrogen ***,the nitrogen-doped carbon polyhedrons-encapsulated Mop(MoP@NC)supported Pt nanoparticles were demonstrated to be effective for methanol electrolysis resulting from the combined *** nitrogen-doped carbon polyhedrons not only greatly enhanced the conductivity but also effectively prevented the aggregation of MoP to offer Pt anchoring *** electronic structure modification of Pt from their interaction reduced the adsorption energy of co^(*),resulting in good cO-poisoning resistance and accelerated reaction ***,Pt-MoP@NC exhibited the highest peak current density of 106.4 ***^(-2) for methanol oxidation and a lower overpotential of 28 mV at 10 ***^(-2) for hydrogen ***-saving hydrogen production from methanol electrolysis was demonstrated in the two-electrode systems assembled by Pt-MoP@NC which required a low cell voltage of 0.65 V to reach a kinetic current density of 10 ***-on the glass carbon system,about 1.02 V less than thatofwaterelectrolysis.
Oil film vortex severely reduces the stability of hydrostatic bearings. A solid-liquid interface with drag and slip properties can weaken the oil film vortex of the bearing. Here, a combined picosecond laser ablation ...
详细信息
Oil film vortex severely reduces the stability of hydrostatic bearings. A solid-liquid interface with drag and slip properties can weaken the oil film vortex of the bearing. Here, a combined picosecond laser ablation and chemical modification method is proposed to prepare surfaces with microbulge array structure on 6061 aluminum alloy substrates. Because of the low surface energy of the perfluorododecyltriethoxysilane modification and the bulge geometry of the microbulge array structure, the surface shows excellent superhydrophobicity. The optimum contact angle in air for water is 164°, and that for oil is 139°. Two surfaces with “lotus-leaf effect” and “rose-petal effect” were obtained by controlling the processing parameters. The drag reduction properties of superhydrophobic surfaces were systematically investigated with slip lengths of 22.26 and 36.25 μm for deionized water and VG5 lubricant, respectively. In addition, the superhydrophobic surface exhibits excellent mechanical durability and thermal stability. The proposed method provides a new idea for vortex suppression in hydrostatic bearings and improves the stability of bearings in high-speed operation.
In order to meet the requirements of accurate identification of surface defects on copper strip in industrial production, a detection model of surface defects based on machine vision, CSC-YOLO, is proposed. The model ...
详细信息
Electrochromic energy-storage materials based on WO3that fuse electrochromic with electrochemical energy-storage technologies are receiving great attention. In this present, WO3and N-doped carbon（WO3/xNC） nano-hybri...
详细信息
Electrochromic energy-storage materials based on WO3that fuse electrochromic with electrochemical energy-storage technologies are receiving great attention. In this present, WO3and N-doped carbon（WO3/xNC） nano-hybrid films were built through the carbonization process of WO3/polydopamine films. The ion transport ability of WO3film and its interface was effectively improved using NC as a surface modification layer. Furthermore, NC also played the role of a protective film to avoid structural damage, as well an ionic storage film during the electrochemical process of the WO3/xNC films. Hence, in comparison with the ant nest-like WO3nanoporous film, WO3/xNC films exhibited better electrochromic energy-storage performance. The colored/bleached response times of WO3/1.0NC were 5.3 s/5.5 s and 60.2%/36.0% shorter than that of WO3film, respectively. WO3/1.0NC could retain 91.6% of initial optical contrast after 2500 cycles. Moreover, the area capacitance of WO3was also improved by 61.7% using the surface modification of 1.0NC. Thus, the WO3/xNC nano-hybrid films display great prospects in the field of electrochromic energy storage.
Recently, composite PVDF membranes with good performance have triggered enormous interest because of their great potential application. However, the uncertainty of mechanical properties limits their application. Herei...
详细信息
Among the many heavy metal pollution treatment agents, carbonate materials show strong flexibility and versatility by virtue of their high adsorption capacity for heavy metals and the characteristics of multiple and s...
详细信息
The increasing use of cloud-based image storage and retrieval systems has made ensuring security and efficiency crucial. The security enhancement of image retrieval and image archival in cloud computing has received c...
详细信息
The increasing use of cloud-based image storage and retrieval systems has made ensuring security and efficiency crucial. The security enhancement of image retrieval and image archival in cloud computing has received considerable attention in transmitting data and ensuring data confidentiality among cloud servers and users. Various traditional image retrieval techniques regarding security have developed in recent years but they do not apply to large-scale environments. This paper introduces a new approach called Triple network-based adaptive grey wolf (TN-AGW) to address these challenges. The TN-AGW framework combines the adaptability of the Grey Wolf Optimization (GWO) algorithm with the resilience of Triple Network (TN) to enhance image retrieval in cloud servers while maintaining robust security measures. By using adaptive mechanisms, TN-AGW dynamically adjusts its parameters to improve the efficiency of image retrieval processes, reducing latency and utilization of resources. However, the image retrieval process is efficiently performed by a triple network and the parameters employed in the network are optimized by Adaptive Grey Wolf (AGW) optimization. Imputation of missing values, Min–Max normalization, and Z-score standardization processes are used to preprocess the images. The image extraction process is undertaken by a modified convolutional neural network (MCNN) approach. Moreover, input images are taken from datasets such as the Landsat 8 dataset and the Moderate Resolution Imaging Spectroradiometer (MODIS) dataset is employed for image retrieval. Further, the performance such as accuracy, precision, recall, specificity, F1-score, and false alarm rate (FAR) is evaluated, the value of accuracy reaches 98.1%, the precision of 97.2%, recall of 96.1%, and specificity of 917.2% respectively. Also, the convergence speed is enhanced in this TN-AGW approach. Therefore, the proposed TN-AGW approach achieves greater efficiency in image retrieving than other existing
Ionic polymers functionalized with hydroxyl, carboxyl, and amino groups can enhance the catalytic activity of catalysts. However, the straightforward preparation of bifunctional ionic polymers containing abundant ioni...
详细信息
The increasing volume of waste generated by agriculture is one of the major environmental challenges faced by humanity. The process of producing biogas through anaerobic digestion has become a focus of research and is...
详细信息
暂无评论