Porous carbon materials derived from plane tree leaves were prepared via a facile high-temperature carbonization method. The activated by KOH solution, and then carbonized under nitrogen atmosphere protection at 500 ℃, 600 700 ℃ 800 respectively. obtained porous characterized in detail scanning electron microscope (SEM), X-ray powder diffractometer (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Raman BET analysis. electrochemical properties of the analyzed galvanostatic...

Lithium-ion batteries are generally regarded as a leading candidate for energy storage systems. The safe and reliable operation of lithium-ion depends largely on accurate estimation the state charge (SOC), which requires an battery model. Bearing strong mechanisms, electrochemical model (EM) can mimic dynamics with high fidelity, thus EM-based methods produce more SOC estimates. This paper proposes novel method from mechanism perspective. Firstly, single particle is employed to gain direct...

Rare earth mineral composite materials were prepared using tourmaline and cerous nitrate as raw materials. Through characterization by scanning electron microscopy, X-ray diffraction, photoelectron spectroscopy, dynamic contact angle meter tensiometer, Fourier transform infrared it was found that the had a better far emitting performance than tourmaline, which depended on many factors such material composition, microstructure, surface free energy. Based results of flue gas analyzer water...

Biodegradable polymers and bioactive fillers are being combined in a variety of composite materials for biomedical application. Biological properties vivo poly-L-lactide (PLLA) matrix containing bovine bone were investigated by using acute systemic toxicity vivo, blood biocompatibility, sensitivity, pyrogen, genetic testing methods. The results indicated that there no toxic death cases observed the test. PLLA/bovine showed toxicity, or sensitizing response hemolytic index was 0.29%. from...

A series of ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3\ensuremath{-}x}{\mathrm{Fe}}_{x}{\mathrm{O}}_{y}$ $(x=0--0.50)$ samples has been studied by means positron annihilation technology, scan electron microscope and x-ray diffraction. The oxygen contents the have measured using a volumetric method. short-lifetime component ${\ensuremath{\tau}}_{1}$ decreases abruptly between $x=0.12$ 0.15 where compound undergoes an O-T phase transition tweed microstructure disappears. We proposed simple model to...

To evaluate the biological safety of composite materials based on poly(L-lactide-co-glycolide) (PLGA) and bioactive glass (BG), which have a potential application in tissue engineering, in-vivo properties were investigated by applying micronucleus test, acute systemic toxicity haemolytic test pyrogen measurement. The results indicated that PLGA/BG showed no genetic toxicity; there was toxicosis or death observed test. suggested composite, with index 0.281%, did not an obvious reaction. In...

The site occupancy, structure, and bonding properties of O in an NiAl grain boundary (GB) have been investigated by employing a first-principles total energy method based on density functional theory with the generalized gradient approximation ultrasoft pseudopotential. Σ5(310)/[001] tilt GB has chosen because (i) Σ = 5 observed to be higher fraction experimentally, (ii) is energetically favorable comparison Σ5(210)/[001]. shown favor segregation -1.75 eV, indicating that most impurity will...

Abstract Designing and fabricating nanocomposite scaffolds for bone regeneration from different biodegradable polymers bioactive materials are an essential step to engineer tissues. In this study, the composite scaffold of gelatin/hyaluronic acid (Gel/HA) containing nano-bioactive glass (NBG) was prepared by using freeze-drying method. The biocompatibilities in-vitro Gel-HA/NBG scaffolds, including MTT assay, ALP activity, von Kossa staining tetracycline staining, were investigated. SEM...

The atomic and electronic structures of an Al grain boundary with segregated Sr (substitutional) impurity atoms have been calculated by the first-principles pseudopotential method based on local density functional theory. results show that expands charge decreases significantly over whole due to segregation. This suggests weakening, which should be responsible for experimentally observed Sr-induced intergranular embrittlement.

Abstract Plastic deformation at room temperature, and the proceeding heat treatments, are important processes for optimizing microstructure mechanical properties of austenitic stainless steel. The cold-drawn 304 steel wire were investigated after annealing 700 °C 800 °C, with different times (20, 40 60 min) drawing strain (0.4, 1.0 1.5). Electron backscattered diffraction (EBSD) techniques, transmission electron microscope (TEM) analysis, differential scanning calorimeter (DSC) tensile tests...

The process and mechanism of electro-oxidation manganese sulfide ore(MnS) in sulfuric acid(H2SO4)solution were investigated this study. conditions leaching experiment systematically optimized, including the liquid-solid ratio, current density, quantity electric charge, temperature, H2SO4 concentration FeSO4 dosage. Leaching ratio 95.86% anodic efficiency 92.58% obtained under optimized solid-liquid 30 ml/g, density 700 A/m2, 20 A/(h·g),40 °C, 4.0 mol/L 60 g/L FeSO4. ore was by scan electron...

Poly-L-lactide (PLLA) has been applied to bone replacement materials due its good biocompatibility and biodegradability However, lack of bioactivity the release acidic degradation products, which may lead inflammatory responses, limit application. Composite based on PLLA bioactive glass (BG) were prepared by a moulding method screws machined from composites. The in vivo PLLA/BG composite material was evaluated haematoxylin eosin staining, bone-bonding ability also performed using...

The marine energy reserves available for development in China are huge, and the coastal areas highly concentrated China's power load area, so research of is great significance. Aiming at problem large fluctuation poor predictability offshore wind generation, a combined generation system tidal current proposed. This paper analyzes time space complementary characteristics energy, designs integrated platform, establishes model based on DC bus network, determines evaluation index system. Based...

This paper establishes the vehicle scheduling model of logistics enterprises and analyzes fast effective distribution vehicles. The main exploration direction is center has a certain number vehicles, in weight goods known to build dispatching method sent center, using particle swarm optimization (PSO) algorithm get results, analysis optimal solution.

To improve the efficiency of cost control in high speed railway construction phase, we set up model earned value and install FBCWS index, through contrast between index ACWP' stage, so that can do better direction before costs incurred make management more scientifically effectively phase high-speed rail project.