Luoke Hu

Bio: Luoke Hu is an academic researcher from Zhejiang University. The author has contributed to research in topics: Energy consumption & Machining. The author has an hindex of 11, co-authored 22 publications receiving 491 citations. Previous affiliations of Luoke Hu include University of Macau.

High Yield Bi2Te3 Single Crystal Nanosheets with Uniform Morphology via a Solvothermal Synthesis

Abstract: Hexagonal nanosheet of Bi2Te3 single crystals with uniform morphology were facilely synthesized through a high yield solvothermal route at low temperature (180 °C). X-ray diffraction, scanning elec...

Energy consumption monitoring for the order fulfilment in a ubiquitous manufacturing environment

Abstract: The objective of this study is to monitor manufacturing energy consumption (MEC) in a discrete manufacturing enterprise, where energy is consumed everywhere and anytime with creating ubiquitous MEC data. The ubiquitous manufacturing (UbiM) technology, including radio frequency identification (RFID) technique, is employed to automate real-time data acquisition and processing for an order fulfilment. An MEC model for the order fulfilment is constructed according to the bill of materials (BOM). In this model, the computation is triggered by an RFID read event (RRE) enabling a digital energy metre to acquire energy consumption value of a workstation for processing a certain material, and then the acquired value is assigned to an energy consumption event (ECE). To reflect the effect of an ECE on energy consumption of a production task, a station-material energy consumption matrix (smECM) is constructed to store the relevant event data, which plays a key role in alleviating MEC monitoring restrictions caused by big energy data. By operating the matrix, the MEC monitoring information can be effectively extracted. To assist manufacturing enterprises to better employ it, the proposed method was demonstrated by monitoring MEC of an order in an auto-part manufacturer.

Photonics and optoelectronics of two-dimensional materials beyond graphene.

Abstract: Apart from conventional materials, the study of two-dimensional (2D) materials has emerged as a significant field of study for a variety of applications Graphene-like 2D materials are important elements of potential optoelectronics applications due to their exceptional electronic and optical properties The processing of these materials towards the realization of devices has been one of the main motivations for the recent development of photonics and optoelectronics The recent progress in photonic devices based on graphene-like 2D materials, especially topological insulators (TIs) and transition metal dichalcogenides (TMDs) with the methodology level discussions from the viewpoint of state-of-the-art designs in device geometry and materials are detailed in this review We have started the article with an overview of the electronic properties and continued by highlighting their linear and nonlinear optical properties The production of TIs and TMDs by different methods is detailed The following main applications focused towards device fabrication are elaborated: (1) photodetectors, (2) photovoltaic devices, (3) light-emitting devices, (4) flexible devices and (5) laser applications The possibility of employing these 2D materials in different fields is also suggested based on their properties in the prospective part This review will not only greatly complement the detailed knowledge of the device physics of these materials, but also provide contemporary perception for the researchers who wish to consider these materials for various applications by following the path of graphene

Sustainability of additive manufacturing: An overview on its energy demand and environmental impact

Abstract: Additive Manufacturing (AM) has been rapidly developing over the last decade. It shows great potential in reducing the need for energy- and resource-intensive manufacturing processes, which in turn reduces the amount of material required in the supply chain, and enables more environmentally benign practices. However, the question of how to realize these potential benefits has received little attention. This paper aims to provide an overview of the Sustainability of Additive Manufacturing (SAM). The context of the SAM is introduced, with a focus on energy and environmental impacts. Resource consumption is identified as the most important aspect. Examination from a life cycle perspective is also presented, with explicit discussions on opportunities to reduce energy and material consumption through design, material preparation, manufacturing, usage, and end-of-life treatment. Statistical data analysis provides an overview of impact forecasts, highlighting the importance of and need for thorough research on sustainability. The eco-design concept enabled by AM is identified as the most promising and effective technology, further extending and completing its design capability. This also determines the opportunities for energy and environmental optimization in subsequent processes. Most existing research is in process- and system-specific modeling, and few AM processes and systems have been studied, with generally premature conclusions. General models for each type of AM process are still necessary. Lastly, five research priorities are suggested: improve systematic data integration and management, correlate energy and quality, develop intelligent machinery, focus on material preparation and recycling, and discover innovative applications using AM.

A review on bismuth telluride (Bi 2 Te 3 ) nanostructure for thermoelectric applications

Abstract: Bismuth Telluride (Bi2Te3) is basically known as an efficient thermoelectric material. Nowadays, it has been attracted a great deal of interest in energy harvesting, chip cooling, chip sensing and other field of material science because of its potential applications. In order to produce Bi2Te3 nanostructure, a number of methods such as solvo and hydro thermal, refluxing, straight forward arc–melting and polyol methods have been employed. Among of them, the solvothermal method has been one of the most common methods to fabricate Bi2Te3 nanostructure in thermoelectric applications. But the development of device–quality material has been a challenging task for the researchers, yet. For this reason, this paper provides a review of current research activities on Bi2Te3 nanostructure growth by several methods and its characterization through theoretical and analytical aspects. Moreover, the paper handles a systematic and intensive research work to develop and understand the materials in nanostructure forms.

Advanced cutting tools and technologies for drilling carbon fibre reinforced polymer (CFRP) composites: A review

Abstract: Carbon fibre reinforced polymer (CFRP) composites have excellent specific mechanical properties, these materials are therefore widely used in high-tech industries like the automobile and aerospace sectors. The mechanical machining of CFRP composites is often necessary to meet dimensional or assembly-related requirements; however, the machining of these materials is difficult. In an attempt to explore this issue, the main objective of the present paper is to review those advanced cutting tools and technologies that are used for drilling carbon fibre reinforced polymer composites. In this context, this paper gives a detailed review and discussion of the following: (i) the machinability of CFRP including chip removal mechanisms, cutting force, tool wear, surface roughness, delamination and the characteristics of uncut fibres; (ii) cutting tool requirements for CFRP machining; and (iii) recent industrial solutions: advanced edge geometries of cutting tools, coatings and technologies. In conclusion, it can be stated that advanced geometry cutting tools are often necessary in order to effectively and appropriately machine required quality features when working with CFRP composites.