Nanocrystalline materials have wide potential applications due to the special properties, which can be easily prepared by nanocrystallization of amorphous alloys. In this work, phase transformations melt-spun Mg60Ni30La10 alloy were characterized in-situ XRD and TEM. The results showed that during crystallization Mg2Ni first formed from matrix followed LaMg3, LaMg2Ni LaMgNi4. transformation was completed rapidly, with nucleation progressing more prominently than grain growth. Nucleation...

This paper addresses the problem of channel estimation in 5G-enabled vehicular-to-vehicular (V2V) channels with high-mobility environments and non-stationary feature. Considering orthogonal frequency division multiplexing (OFDM) system, we perform extended Kalman filter (EKF) for conjunction Iterative Detector & Decoder (IDD) at receiver to improve accuracy. The EKF is proposed jointly estimating response time-varying time correlation coefficients. And IDD structure adopted reduce errors...

Non-stationarity is a key feature of wireless channels in high-mobility environments, such as high speed railway, which one the barriers on improving communication quality if not being well treated channel estimation. Traditional Kalman Filter (KF)- based estimation methods that assume constant time correlation coefficients Jakes model are no longer valid non-stationary channel. To address challenges OFDM communications, joint design estimation, detection and decoding proposed basis Extended...

In large-scale and sparse scenes, such as farmland, orchards, mines, substations, 3D simultaneous localization mapping are challenging matters that need to address issues maintaining reliable data association for scarce environmental information reducing the computational complexity of global optimization scenes. To solve these problems, a real-time incremental algorithm called MIM_SLAM is proposed in this paper. This applied mobile robots build map on non-flat road with LiDAR sensor....

The life cycle environmental impacts of the new model radial passenger vehicle tire product was evaluated and compared. silicon dioxide added to replace part carbon black as filler, with its previous product. study covers all relevant stages: from acquisition raw materials production, use, end-of-life. data collected onsite in 2014 by one largest Chinese companies were used assessment. evaluation is presented terms individual impact category according CML model. Five categories (i.e., global...

With the development of economy, China has become one largest cement producers in world. However, industry is a main contributor global carbon emissions. Substituting calcium carbide sludge for limestone an effective method CO 2 emission reduction and developed rapidly recent years China. The purpose this study to determine life cycle clinker produced with as secondary raw material. results show that compared general clinker, intensity will be decreased by 39.1% when substitution rate 80%....

The electrical lifetime of electromechanical device is affected by the contact mechanical rolling and sliding behavior greatly. distance broadside lines pair are captured <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">in situ</i> analyzed introducing charge-coupled camera with a high pixel resolution. variations in performance parameters operation cycles at each constant gap investigated using our novel designed test rig. degradation...

Approximately 416.9 million m 3 of concrete were used in China buildings, roads and other constructions 2009. This makes one the most common building materials on market. While consuming large amounts energy, industry has also cause burden environment due to environmental emissions by production cement transport materials. Therefore, more detailed quantitative studies are necessary finally acknowledge its effects energy environment. The objective this paper is identify quantify consumption,...

Aerated concrete is a new type of wall material with beneficial features like light weight, heat insulation, fire prevention and low energy consumption. As key milestone in materials innovation energy-saving building system, it has been proven to be an ideal which can replace traditional clay brick through years application practice. This study calculated the CO 2 emissions all stages life cycle aerated production. Compared brick, intensity block will decreased by 67.4% same insulation...

Sharing economy is seen as an essential building block for sustainability. Yet, inefficient utilizing of parking spaces needs more attention, by which both direct and indirect traffic congestions may be caused, jeopardizing the economic potential sustainable development. Conventional service gradually lose favour in analogy to its counterpart, a novel approach solving shortage urban resources offered shared parking. Hence, this paper, problems how redistribute available private-owned slots...

This study attempted to estimate the environmental performance of poly (propylene carbonate, PPC) in whole life cycle. The cycle is from raw materials, energy acquisition, manufacture, transportation, final disposal, sequentially. environment impacts these phases are assessed by method Life Cycle Assessment (LCA) identify key aspects loads involving global warming, non-renewable resource consumption, and acidification effects so on. Moreover, a comparative due manufacturing PPC its was taken...

In large-scale and sparse environments, such as farmlands, orchards, mines electrical substations, global localization based on particle filter framework without any prior knowledge still remains a challenging problem. Some issues speeding up the convergence of particles improving accuracy in similar scenes need to be addressed. This paper proposes novel method, which treats problem place recognition pose estimation Specifically, we firstly utilize random forests algorithm train classifier...

In this paper, an improved 2-optimization(2-opt) and Ant Colony Optimization (ACO) Hybrid Algorithm is proposed to solve the Traveling Salesman Problem (TSP). The scheme of ACO define indirect expectation heuristic introduce it into calculation method transition probability, which will reduce effect pheromone on ant selecting path increase path's diversity ACO. way, deficiency in convergence local optimal solution be made up. Considering stronger search ability, 2-opt algorithm used optimize...