摘要：
To investigate the regeneration mechanisms of rejuvenated asphalt mixtures, molecular simulation techniques were employed to research virgin and aged asphalt's fusion characteristics and interface mechanical properties. The blended zone was identified based on relative density distribution, and a molecular-scale calculation method for the Degree of binder Blended (DOB) between virgin and aged asphalt was proposed. Finally, the influence of DOB on the mechanical properties of the asphalt-aggregate interface was evaluated through interface pull-out tests. The results revealed that the proposed molecular-scale DOB calculation method effectively assessed the blending effectiveness between virgin and aged asphalt. Higher degrees of asphalt aging made it more challenging for aged asphalt to fuse with virgin asphalt, while elevated temperatures facilitated diffusion fusion between them. Under tensile loading, initial cracks were primarily initiated from the rejuvenated asphalt's blended zone. This region represented the weakest area within the interface system and was prone to fracture under load. The increase in DOB significantly improved the interfacial properties of recycled asphalt, with the increase in DOB the interfacial tensile strength increased by 4%-14% and the fracture energy increased by 10%- 19%. However, this enhancement effect diminished with an increased degree of asphalt aging. At the molecular scale, increasing DOB improved the interface strength and deformation resistance of rejuvenated asphalt. The molecular simulation results provide theoretical guidance for evaluating the fusion degree of aged asphalt in RAP materials and determining the utilization efficiency of aged asphalt.
摘要：
The microstructure, mineral composition, total organic carbon content, etc., of gas shale are crucial parameters for shale reservoirs, which can directly/indirectly affect shale brittleness, fracturing effect, adsorption ability and production efficiency. The study proposed a workflow to characterize the physical and mechanical parameters of Lower Silurian Longmaxi shale outcrop samples extracted from the favorable block in Changning, Sichuan, southwest China. This study elaborated on the influence of these physical and mechanical characteristics and proposed a corresponding brittleness index on shale extraction. In addition, it put forward corresponding suggestions for development and risk control. For a better understanding the mechanisms of shale gas storage and production, XRD, XRF, SEM, low temperature Nitrogen adsorption method, nuclear magnetic resonance and other measurements were employed to analyze and study the mineral composition, microstructure, and adsorption performance of shale. The results demonstrated that the pores of shale are mainly slit pores; there are diverse pore types in shale, mainly including intergranular pores, mineral particle dissolution pores, and internal pores of organic matter; The samples with relatively low porosity also noticeably exhibit ultra-low permeability, and the nanopore structure is remarkably significant, with distribution primarily in range of 5–237 nm. Finally, a brittleness index considering the influence of water content and the mechanical properties was proposed, and the coupling interaction of various minerals components and mechanical properties on the brittleness index can more objectively reflect the brittleness characteristics of deep shale formation.
作者机构：
[Lei, Shan; Li, Zhuang; Gao, Yi] Hunan City Univ, Dept Phys, Yiyang 413000, Hunan, Peoples R China.;[Lei, Shan; Li, Zhuang] Hunan City Univ, All Solid state Energy Storage Mat & Devices Key L, Yiyang 413000, Peoples R China.;[Zhang, Zhongde] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Hunan, Peoples R China.
通讯机构：
[Li, Z; Lei, S ] H;Hunan City Univ, Dept Phys, Yiyang 413000, Hunan, Peoples R China.;Hunan City Univ, All Solid state Energy Storage Mat & Devices Key L, Yiyang 413000, Peoples R China.
摘要：
beta-type Zirconium alloys are promising biomedical implant materials, the elastic and magnetic properties of which are of great importance to be studied. In this work, beta-type Zr1-xTax binary alloys (x = 0.0625, 0.125, 0.1875, 0.25, 0.3125, 0.375, 0.4375, 0.50, 0.5625, 0.625, 0.6875, 0.75, 0.8125, 0.875, 0.9375) were established. The effects of Ta content on lattice constant, elastic properties and magnetic properties of beta-type Zr-Ta alloys were investigated via first-principles calculations, the calculated results were also verified through experiments. The results shown that with the increase of Ta content, the lattice constant and total energy of beta-type Zr-Ta alloys gradually decreased, the elastic moduli of E, K and G increased on the whole, and the magnetic moment generally increased first and then decreased. The changing trend of elastic and magnetic properties were consistent between experimental and calculated results. Notably, Zr0.875Ta0.125 exhibited the lowest Young's modulus and magnetic susceptibility among the beta-type Zr-Ta alloys, which was one-third that of Ti-6Al-4V, meeting the requirements for low Young's modulus and low magnetism, and can be anticipated to be promising biomedical implant materials.
通讯机构：
[Xiao, M ] H;Hunan City Univ, Coll Civil Engn, Yiyang 413000, Hunan, Peoples R China.
摘要：
This paper investigates the implementation of a Multi-Objective Optimization technique for improving public transportation route planning in the setting of smart cities. Recognizing the difficulties of urban mobility, our technique incorporates a variety of criteria, including traffic patterns, cost-effectiveness, and environmental impact, to create an efficient route design system. The research applies complex algorithms to overcome the issues present in existing route planning procedures, using real-world data sources such as GPS data and traffic reports. We illustrate the efficacy of our strategy in boosting time efficiency, lowering costs, and decreasing environmental footprints via extensive case studies. The assessment measures used emphasise the suggested system’s advantages over current techniques. The debate digs into the larger implications for smart city development, recognising limits and providing possibilities for further study. This study adds vital insights and practical answers to the developing subject of smart city transportation, providing a solid basis for the continuing growth of urban mobility.
摘要：
Bamboo holds great promise as a versatile material in construction and engineering. However, its inherent hydrophilic nature, particularly within its cell walls, presents challenges for dimensional stability, limiting its widespread use. Addressing this challenge, vapor phase furfurylation (VPF) has emerged as a promising technique for bamboo modification. In this study, we applied VPF to bamboo for the first time, resulting in a significant transition towards hydrophobicity and a remarkable enhancement in dimensional stability (ASE > 50 %). Employing a multifaceted approach, we investigated the distribution gradient and penetration depth of FA resin within furfurylated bamboo using advanced methodologies such as scanning electron microscopy (SEM), nanoindentation, dynamic vapor sorption (DVS), and imaging FT-IR microscopy, demonstrating the improvement in dimensional stability is attributed to cell wall bulking from FA resin infiltration. Through meticulous parameter refinement, we identified an optimized protocol comprising 40 h of VPF exposure, a VPF temperature of 115 degrees C, and a 4.5 % concentration of maleic anhydride (MA). This tailored VPF methodology holds promise for enhancing the dimensional stability of bamboo while minimizing FA consumption, thus expanding its potential applications in construction and furniture industries.
摘要：
INTRODUCTION: Broussonetia papyrifera is a dioecious plant that is rich in various metabolites and widely distribute in Asia. Microtus fortis is a rodent that often causes damage to crops, especially in the Dongting Lake region of China. There is a wide overlap in the distribution areas for the above species and the M. fortis feeds on the leaves of the B. papyrifera. Preliminary experiments have shown that the reproduction of M. fortis is inhibited after feeding on the leaves of the B. papyrifera. METHODS: In order to explore the potential of using B. papyrifera to develop botanical pesticides, we investigated the palatability and reactive substances. The feeding frequency of M. fortis on B. papyrifera leaves to that of on daily fodder and Carex brevicuspis that is the primary food for the wild population were compared. We also attempted to identify the responsive substances in B. papyrifera leaves that were bitten by M. fortis using metabolome analysis. RESULTS: In general, B. papyrifera leaves exhibited a stronger attraction to M. fortis. M. fortis foraged B. papyrifera leaves more frequently, and the intake was higher than that of the other two. Differential metabolites were screened by comparing normal leaves and leaves bitten by M. fortis, meanwhile with the intervention of clipped leaves. A total of 269 substances were screened, and many of these were involved in the biosynthesis of secondary metabolites, including terpenoids and alkaloids. These substances may be related to the defense mechanism of B. papyrifera against herbivores. DISCUSSION: These findings support further research examining animal-plant interactions and simultaneously provide insights into the utilisation of B. papyrifera resources and the management of rodents. The good palatability and the defense of B. papyrifera leaves suggest that they have the potential to contribute in development of plant rodenticide.
摘要：
An innovative anchorage technology named load distributive compression anchor (LDCA) has recently been employed in a multitude of geotechnical engineering. The anchoring structure comprises multiple anchor bodies, thereby overcoming the bearing defects associated with conventional load-concentrated anchors and providing superior bearing performance. The complex structural configuration of LDCA considerably complicates the process of load-transfer theoretical modeling. A lack of relevant studies from theoretical solution perspective is yet evident in previous works. In this paper, a theoretical model was proposed for the load-transfer analyses of LDCA, of which the soil-anchor interface mechanical behavior was specially characterized by a disturbed state concept (DSC)-based nonlinear model. The mechanical simulation for the connections in different anchor bodies was incorporated into the theoretical analysis framework through the utilization of finite difference method. Three groups of 3D finite element (FE) models were established to simulate the load-transfer behaviors of LDCAs with different numbers of anchor bodies. The theoretical calculations agree well with the FE numerical results and the in-situ pullout test data, thereby confirming the applicability of the load-transfer theoretical model. The axial force and interface shear stress distributions, as well as the bearing capacity for LDCAs, were discussed based on theoretical calculations and FE simulations. Sensitivity analysis of several key design parameters was conducted to investigate their effects on the bearing capacity of LDCAs. The findings achieved in this study can provide insights into the understanding of the load-transfer behaviors of LDCA, and contribute to the bearing performance evaluation.
作者机构：
[Zhou, Shuang-shuang] Hunan City Univ, Sch Informat Sci & Engn, Yiyang 413000, Hunan, Peoples R China.;[Khan, Muhammad Ijaz; Khan, Sami Ullah] Prince Mohammad Bin Fahd Univ, Dept Mech Engn, POB,1664, Al Khobar 31952, Saudi Arabia.;[Khan, Sami Ullah] Namal Univ, Dept Math, Mianwali 42250, Pakistan.;[Qayyum, Sumaira] Quaid I Azam Univ, Dept Math, Islamabad 44000, Pakistan.
通讯机构：
[Khan, MI ] P;Prince Mohammad Bin Fahd Univ, Dept Mech Engn, POB,1664, Al Khobar 31952, Saudi Arabia.
关键词：
heat generation;surface reaction;CNTs based nanofluid;stretching/shrinking sheet;thermal radiation;76Wxx
摘要：
The investigation endorsed the convective flow of Carreau nanofluid over a stretched surface in presence of entropy generation optimization. The novel dynamic of viscous dissipation is utilized to analyze the thermal mechanism of magnetized flow. The convective boundary assumptions are directed in order to examine the heat and mass transportation of nanofluid. The thermal concept of thermophoresis and Brownian movements has been re-called with the help of Buongiorno model. The problem formulated in dimensionless form is solved by NDSolve MATHEMATICA. The graphical analysis for parameters governed by the problem is performed with physical applications. The affiliation of entropy generation and Bejan number for different parameters is inspected in detail. The numerical data for illustrating skin friction, heat and mass transfer rate is also reported. The motion of the fluid is highest for the viscosity ratio parameter. The temperature of the fluid rises via thermal Biot number. Entropy generation rises for greater Brinkman number and diffusion parameter.
关键词：
Deep eutectic solvents;Three-phase partitioning;Edible liquid oil;Speciation analysis of Chromium;Liquid -liquid microextraction
摘要：
In this paper, a novelty ternary deep eutectic solvents was prepared with choline chloride , ethylene glycol and glycerol. The pH value was adjust to develop three-phase for speciation of Cr (Ⅲ) and Cr (Ⅵ) extract and separate in ganoderma lucidum spore oil based on ternary deep eutectic solvents. The results show that DES-4 has a good extraction of Cr (III) and Cr (VI), the sample-extraction ratio was 3:1, Cr (III) was protected by EDTA, all chromium ions in ganoderma lucidum spore oil was extracted by near 100 % in 2 times, Cr (III) and Cr (VI) was well separated by saturated buffer solution of KH 2 PO 4 /H 3 PO 4 (pH = 4.5). The LOD is 0.031 mg/kg. The RSD is 4.1 %. The recovery between 85.2 % and 111.5 %. This method was successfully applied to detect speciation chromium in other edible liquid oil.
In this paper, a novelty ternary deep eutectic solvents was prepared with choline chloride , ethylene glycol and glycerol. The pH value was adjust to develop three-phase for speciation of Cr (Ⅲ) and Cr (Ⅵ) extract and separate in ganoderma lucidum spore oil based on ternary deep eutectic solvents. The results show that DES-4 has a good extraction of Cr (III) and Cr (VI), the sample-extraction ratio was 3:1, Cr (III) was protected by EDTA, all chromium ions in ganoderma lucidum spore oil was extracted by near 100 % in 2 times, Cr (III) and Cr (VI) was well separated by saturated buffer solution of KH 2 PO 4 /H 3 PO 4 (pH = 4.5). The LOD is 0.031 mg/kg. The RSD is 4.1 %. The recovery between 85.2 % and 111.5 %. This method was successfully applied to detect speciation chromium in other edible liquid oil.
