Optimal Geometry of Holes in a Cable Tray for Offshore Plants

This study analyzes the crosstalk effects caused by the geometry of holes in a cable tray in offshore plants. Using the analysis results, we determine the optimal hole geometry that can effectively reduce the tray weight under minimum crosstalk. It was previously shown that metal cable trays can reduce crosstalk among cables. However, the impact of hole geometry was not considered. This study demonstrates the impact of hole geometry on the crosstalk. In addition, an algorithm is proposed to determine the optimal geometry of holes in the cable tray. The simulation results validate the proposed algorithm and can be useful for the designers of cable trays with holes.

Development of Augmented Reality System for Productivity Enhancement in Offshore Plant Construction

As the scale of offshore plants has gradually increased, the amount of management points has significantly increased. Therefore, there are needs for innovative process control, quality management, and an installation support system to improve productivity and efficiency for timely construction. In this paper, we introduce a novel approach to deal with these issues using augmented reality (AR) technology. The core of successful AR implementation is up to scene matching through accurate pose (position and alignment) estimation using an AR camera. To achieve this, this paper first introduces an accurate marker registration technique that can be used in huge structures. In order to improve the precision of marker registration, we propose a method that utilizes the natural feature points and the marker corner points in the optimization step simultaneously. Subsequently, a method of precisely generating AR scenes by utilizing these registered markers is described. Finally, to validate the proposed method, the best practices and its effects are introduced. Based on the proposed AR system, construction workers are now able to quickly navigate to onboard destinations by themselves. In addition, they are able to intuitively install and inspect outfitting parts without paper drawings. Through field tests and surveys, we confirm that AR-based inspection has a significant time-saving effect compared to conventional drawing-based inspection.

Operational-Condition-Independent Criteria Dedicated to Monitoring Wind Turbine Generators

Condition monitoring is beneficial to the wind industry for both land-based and offshore plants. However, because of the variations in operational conditions, its potential has not been fully explored. There is a need to develop an operational-condition-independent condition monitoring technique, which has motivated the research presented here. In this paper, three operational-condition-independent criteria are developed. The criteria accomplish the condition monitoring by analyzing the wind turbine electrical signals in the time domain. Therefore, they are simple to calculate and ideal for online use. All proposed criteria were tested through both simulated and practical experiments, showing that these criteria not only provide a solution for detecting both mechanical and electrical faults that occur in wind turbine generators, but that they provide a potential tool for diagnosing generator winding faults.

A Method to Minimize the Data Size of a Lightweight Model for Ship and Offshore Plant Structure Using Part Characteristics

One of the most widely used methods for representing the shapes of ships and offshore plants is triangular mesh, which has a simple structure and is easy to visualize. In particular, lightweight models composed of triangular meshes are often used as a sharing medium for three-dimensional (3D) shape design results in the collaboration process among many stakeholders participating in the construction process. Currently, there are demands for visualizing the total shapes of ships or offshore plants for design review, interference check, construction monitoring, and securing maintenance space. However, this requires high computing power and much time due to the large size of the triangular mesh model. We have two general solutions as follows: simplifying the shape of the ship and offshore plant structure and reducing the size of the lightweight file itself. Between them, this study proposes a method for reducing the lightweight file. This method classifies the part types of the ship or offshore plant structure and then only stores the minimum triangular mesh information for each part type, excluding unnecessary information. Then, the topographic information of triangular meshes is stored together in the lightweight file to shorten the time required for restoration of the lightweight file.

Indian Pharmaceuticals Industry in Global Scenario: An Appraisal

Today, the Indian pharmaceuticals industry is recognised the world over due to the quality and cost-effectiveness of its products. At present, globally it is one of the fastest-growing industries and contributes 2.4 per cent value wise and 10 per cent volume wise globally. India alone accounts for 20 per cent of global exports in generics. In 2016, the Indian pharma industry exported USD16.89 billion and is expected to touch USD40 billion by 2020. The present generics market has immense potentiality for foreign direct investment (FDI) inflows, and worth USD14.53 billion of FDI inflows came in between April 2000 and December 2016. We have witnessed that Indian pharma companies go for joint ventures with multinational companies, make strategic alliances and co-promotions, contract research and manufacturing services, export, acquisitions and mergers, focus on new markets other than the USA and Europe, buy offshore plants and increase stakes in other companies. India is also becoming an attractive investment for the clinical trials market. The objective of this paper is to analyse the Indian pharmaceuticals industry—opportunity and threats, strategies of the Indian companies particularly after trade-related aspects of intellectual property rights (TRIPS).

Reactive power capability curve of brushless doubly fed reluctance generator

For higher generation of electricity from wind, efficient and cost-effective generators are being developed. Brushless doubly fed reluctance generator with a partially rated converter is one of the promising generators for wind power applications especially for offshore plants. All grid connected wind generators must comply with local grid codes and the prime requirement is reactive power capability. The capabilities of brushless doubly fed reluctance generator need to be investigated under grid connected operation. Therefore, a 2 kW laboratory prototype of this machine is optimally designed and constructed to study generator operation and reactive power capability. This article discusses the development of capability curve for brushless doubly fed reluctance generator from the well-known machine equations in d–q frame. The capability curves of this machine is also obtained from experimental investigations carried out on the 2 kW prototype. The results show that capability curve of brushless doubly fed reluctance generator looks to be ‘V’ shaped and suitable for wind generator applications.