Application of Prefabrication and Assembly to Hong Kong-Zhuhai-Macao Bridge

The Hong Kong-Zhuhai-Macao Bridge(HZMB) project, which has just been opened to traffic in 2018. The special location, construction conditions, quality requirements and multiple functions of HZMB brought many challenges, such as management, technology, safety and environmental protection. To meet these challenges and ensure the achievement of high quality and 120 years design service life, the HZMB project first introduced the completely new concept of "Large size, Factory production, Standardization and Assembly", which was fundamental to the design and construction. This was developed in consideration of the difficulties of the offshore environment.The core idea was Prefabrication and Assembly, which was to change this HZMB project into onshore work as much as possible by cutting this mega sea-crossing into large sized components, which could be prefabricated on land and then transported to the offshore site for assembly. The success of the HZMB undoubtedly has led the technology of prefabrication and assembly to a new height and recognized scale. This paper describes the implementation process of the concept; "Large size, Factory production, Standardization andAssembly" (LFSA) to the HZMB.

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Patterns of the Network of Cross-Border University Research Collaboration in the Guangdong-Hong Kong-Macau Greater Bay Area

Sustainability ◽

10.3390/su12176846 ◽

2020 ◽

Vol 12 (17) ◽

pp. 6846

Author(s):

Jinyuan Ma ◽

Fan Jiang ◽

Liujian Gu ◽

Xiang Zheng ◽

Xiao Lin ◽

...

Keyword(s):

Social Sciences ◽

Hong Kong ◽

Research Collaboration ◽

Citation Impact ◽

High Quality ◽

High Quality Research ◽

Cross Border ◽

Bay Area ◽

Research Areas ◽

Industrial Distribution

This study analyzes the patterns of university co-authorship networks in the Guangdong-Hong Kong-Macau Greater Bay Area. It also examines the quality and subject distribution of co-authored articles within these networks. Social network analysis is used to outline the structure and evolution of the networks that have produced co-authored articles at universities in the Greater Bay Area from 2014 to 2018, at both regional and institutional levels. Field-weighted citation impact (FWCI) is used to analyze the quality and citation impact of co-authored articles in different subject fields. The findings of the study reveal that university co-authorship networks in the Greater Bay Area are still dispersed, and their disciplinary development is unbalanced. The study also finds that, while the research areas covered by high-quality co-authored articles fit the strategic needs of technological innovation and industrial distribution in the Greater Bay Area, high-quality research collaboration in the humanities and social sciences is insufficient.

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Flux Method Growth of Large Size Group IV–V 2D GeP Single Crystals and Photoresponse Application

Crystals ◽

10.3390/cryst11030235 ◽

2021 ◽

Vol 11 (3) ◽

pp. 235

Author(s):

Shuqi Zhao ◽

Tongtong Yu ◽

Ziming Wang ◽

Shilei Wang ◽

Limei Wei ◽

...

Keyword(s):

Raman Spectroscopy ◽

Single Crystals ◽

High Performance ◽

Group Iv ◽

X Ray Diffraction ◽

High Quality ◽

Practical Applications ◽

Large Size ◽

Growth Method ◽

Polarized Raman

Two-dimensional (2D) materials driven by their unique electronic and optoelectronic properties have opened up possibilities for their various applications. The large and high-quality single crystals are essential to fabricate high-performance 2D devices for practical applications. Herein, IV-V 2D GeP single crystals with high-quality and large size of 20 × 15 × 5 mm3 were successfully grown by the Bi flux growth method. The crystalline quality of GeP was confirmed by high-resolution X-ray diffraction (HRXRD), Laue diffraction, electron probe microanalysis (EPMA) and Raman spectroscopy. Additionally, intrinsic anisotropic optical properties were investigated by angle-resolved polarized Raman spectroscopy (ARPRS) and transmission spectra in detail. Furthermore, we fabricated high-performance photodetectors based on GeP, presenting a relatively large photocurrent over 3 mA. More generally, our results will significantly contribute the GeP crystal to the wide optoelectronic applications.

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The Transformation from (111) to (100): A Routine to Large-Scale Epitaxial Diamond

10.20944/preprints202011.0746.v1 ◽

2020 ◽

Author(s):

Yang Wang ◽

Weihua Wang ◽

Shilin Yang ◽

Jiaqi Zhu

Keyword(s):

Large Scale ◽

Diamond Films ◽

Diamond Growth ◽

Nucleation Density ◽

Diamond Synthesis ◽

First Principle ◽

High Quality ◽

First Principle Calculations ◽

Large Size ◽

Experimental Researches

Diamond is a material with excellent performances which attracts the attention from researchers for decades. Pt (111), owing to its catalytic activity on diamond synthesis, is regarded to be a candidate for diamond hetero-epitaxity, which can enhance nucleation density. Molten surface at diamond growth temperature can also improve mobility and aggregation capability of primitive nuclei. Generally, (100)-oriented is welcomed for the achivement of high quality and large size diamond, since the formation of defects and twins are prevented. First-principle calculations and experimental researches were carried out for the study of transformation of orientation. The transformation from {111} to {100}-oriented diamond has been observed on Pt (111) substrate, which can be promoted by the increase of carbon source concentration and substrate temperature. The process is energetic favorable, which may provides a way towards large-scale (100) diamond films.

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Improved Reference Genome for Cyclotella Cryptica CCMP332, a Model for Cell Wall Morphogenesis, Salinity Adaptation, and Lipid Production in Diatoms (Bacillariophyta)

10.1101/2020.05.19.103069 ◽

2020 ◽

Author(s):

Wade R. Roberts ◽

Kala M. Downey ◽

Elizabeth C. Ruck ◽

Jesse C. Traller ◽

Andrew J. Alverson

Keyword(s):

Reference Genome ◽

Lipid Production ◽

Fold Increase ◽

High Quality ◽

Short Read Sequencing ◽

Large Size ◽

Reference Genome Assembly ◽

Cell Wall Morphogenesis ◽

Cyclotella Cryptica

ABSTRACTThe diatom, Cyclotella cryptica, is a well-established experimental model for physiological studies and, more recently, biotechnology applications of diatoms. To further facilitate its use as a model diatom species, we report an improved reference genome assembly and annotation for C. cryptica strain CCMP332. We used a combination of long- and short-read sequencing to assemble a high-quality and contaminant-free genome. The genome is 171 Mb in size and consists of 662 scaffolds with a scaffold N50 of 494 kb. This represents a 176-fold decrease in scaffold number and 41-fold increase in scaffold N50 compared to the previous assembly. The genome contains 21,250 predicted genes, 75% of which were assigned putative functions. Repetitive DNA comprises 59% of the genome, and an improved classification of repetitive elements indicated that a historically steady accumulation of transposable elements has contributed to the relatively large size of the C. cryptica genome. The high-quality C. cryptica genome will serve as a valuable reference for ecological, genetic, and biotechnology studies of diatoms.Data available fromNCBI BioProjects PRJNA628076 and PRJNA589195

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Analysis on the Conformity between the Closed-Circuit Embroidery Elements of Different Widths and the Digitally Designed Elements

Autex Research Journal ◽

10.1515/aut-2018-0047 ◽

2019 ◽

Vol 19 (3) ◽

pp. 250-256

Author(s):

Žaneta Juchnevičienė ◽

Milda Jucienė ◽

Vaida Dobilaitė ◽

Virginija Sacevičienė ◽

Svetlana Radavičienė

Keyword(s):

Closed Circuit ◽

Dynamic Loads ◽

Geometrical Parameters ◽

High Quality ◽

Quality Requirements ◽

Textile Materials ◽

The Creation

Abstract The embroidery process is one of the means of joining textile materials into a system, which is widely applied in the creation of products of special destinations. The development of the functionality of embroidery systems is indissoluble from high-quality requirements for the accuracy of the form of the element. In the embroidery process, the system of textile materials experiences various dynamic loads, multiple stretching, and crushing; therefore, the geometrical parameters of the embroidery element change. The objective of this paper was to analyze the widths of the different square-form closed-circuit embroidery elements and also to perform their analysis with the purpose to evaluate the embroidery accuracy of the embroidered elements. Test samples were prepared in the form of square-form closed-circuit embroidery elements of five different contour widths: 6 mm, 10 mm, 14 mm, 18 mm, and 22 mm. During the investigation, it has been determined that in most cases the contour widths of the five closed-circuit square-form embroidery elements were obtained, smaller than the size of the digitally designed element.

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Controllable Synthesis of High Quality Monolayer WS2 with Large Size on Sapphire Substrate by Chemical Vapor Deposition

Chinese Journal of Luminescence ◽

10.3788/fgxb20163708.0984 ◽

2016 ◽

Vol 37 (8) ◽

pp. 984-989

Author(s):

巩哲 GONG Zhe ◽

何大伟 HE Da-wei ◽

王永生 WANG Yong-sheng ◽

许海腾 XU Hai-teng ◽

董艳芳 DONG Yan-fang

Keyword(s):

Chemical Vapor Deposition ◽

Sapphire Substrate ◽

Vapor Deposition ◽

Chemical Vapor ◽

Controllable Synthesis ◽

High Quality ◽

Large Size

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Color Digital Holographic High Quality Reconstruction of Large Size Object

ACTA PHOTONICA SINICA ◽

10.3788/gzxb20114009.1409 ◽

2011 ◽

Vol 40 (9) ◽

pp. 1409-1412

Author(s):

桂进斌 UI Jin-bin ◽

李俊昌 LI Jun-chang ◽

宋庆和 SONG Qing-he ◽

楼宇丽 LOU Yu-li

Keyword(s):

High Quality ◽

Large Size

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Quality-Oriented IT Service Management

Quality Management for IT Services - Advances in Logistics, Operations, and Management Science ◽

10.4018/978-1-61692-889-6.ch006 ◽

2011 ◽

pp. 108-123

Author(s):

Patrick Wild

Keyword(s):

Service Quality ◽

Service Provider ◽

Service Management ◽

Service Providers ◽

It Services ◽

Quality Model ◽

High Quality ◽

Quality Requirements ◽

Reference Models ◽

It Service

<div>Due to the increasing importance of the tertiary sector, information technology (IT) organizations need to face up to new challenges, since their daily business has changed from development and operation of information technology to the customer oriented provision and management of IT services. In order to survive in the market, service providers need to offer and manage competitive and distinctive IT services. The “Profit Impact of Market Strategies” (PIMS) program has emphasized the need for service quality as being a crucial, strategic competitive factor. However, IT service providers do not have guidance of what quality requirements are supposed to be fulfilled to provide high-quality IT services. Different reference models and frameworks such as ITIL (Information Technology Infrastructure Library), COBIT (Control Objectives for Information and related Technology) and ISO 20000 are widely used by many IT organizations for improving service management processes and performance. However, these reference models do not address the improvement of service quality in a consistent manner and it is not clear whether these models have the capability to close quality gaps which may arise within a service provider environment.</div><div><br></div><div>Therefore, this chapter proposes an IT service quality model for identifying potential quality gaps and quality dimensions in an IT service provider environment. Furthermore, it proposes a set of different quality requirements combined in a “Quality Requirements Model for IT Services” that are needed in order to close the respective quality gaps and fulfill the individual quality dimensions. The model is developed by mapping the reference models ITIL v3, COBIT and ISO 20000 to the previously developed quality model. The results of the mappings emphasize that all three models are partially capable to close the individual gaps of the quality model as well as to guarantee the fulfillment of respective quality dimensions. The fulfillment of these developed quality requirements can be utilized as a guideline for providing and managing high-quality IT services in the long term.</div><div><br></div><div>Finally, the maturity level is analyzed and pointed out that most of the quality requirements are assigned to maturity stage 2 or 3. This implies that an IT service provider does not necessarily have to reach a maturity stage 4 or 5 being able offering high service quality.</div><div><br></div><div>In summary, the chapter provides guidance and quality-oriented IT Service Management to answer the following questions:</div><div><br></div><div><ul><li>What kind of quality gaps exist in a service provider environment?<br></li><li>Do reference models such as ITIL, COBIT and ISO 20000 have the capability to close quality gaps which may arise within a service provider environment?<br></li><li>What processes, activities and functions from which reference model are needed in order to close the respective gaps?<br></li><li>What quality requirements need to be implemented in order to provide high-quality IT services?<br></li><li>What maturity level do service providers need to reach in order to fulfill quality requirements?<br></li></ul></div>

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Morphological Characteristics of Dimples of Ductile Fracture of VT23M Titanium Alloy and Identification of Dimples on Fractograms of Different Scale

Materials ◽

10.3390/ma12132051 ◽

2019 ◽

Vol 12 (13) ◽

pp. 2051 ◽

Cited By ~ 1

Author(s):

Ihor Konovalenko ◽

Pavlo Maruschak ◽

Janette Brezinová ◽

Jozef Brezina

Keyword(s):

Titanium Alloy ◽

Ductile Fracture ◽

Digital Images ◽

Morphological Characteristics ◽

Automated Detection ◽

Fracture Mechanisms ◽

Test Results ◽

High Quality ◽

Quality Requirements ◽

Shape And Size

The authors developed a method for the automated detection and calculation of quantitative parameters of dimples of ductile fracture on the digital images of fracture surfaces obtained at different scales. The processing algorithm of fractographic images was proposed, which allowed high quality recognition of the shape and size of dimples to be achieved, taking into account the morphological features of their digital images. The developed method for identifying dimples of various physical and morphological characteristics was tested on the VT23M alloy. The test results showed that the method meets the quality requirements for the automated diagnostics of fracture mechanisms of titanium alloys.

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