A comparative study of optimization methods and conventional methods for sampling design in fishery-independent surveys

Abstract Liu, Y., Chen, Y., and Cheng, J. 2009. A comparative study of optimization methods and conventional methods for sampling design in fishery-independent surveys. – ICES Journal of Marine Science, 66: 1873–1882. We have introduced and evaluated a procedure, the constrained spatial simulated annealing method, for developing an optimal sampling design for fishery-independent surveys. We used two criterion functions, minimization of the mean of the shortest distance (MMSD) and uniform distribution of point pairs for variogram estimation (WM), and three arrangements of the two criteria, all WM, all MMSD, and a combination of MMSD (2/3 of samples) and WM (1/3), to construct three optimized sampling designs (denoted as Designs I, II, and III, respectively). These three designs were compared in a simulation study with systematic sampling (Design IV) and stratified random sampling designs (Design V), commonly used in fishery-independent surveys. Three levels of sample size (small, medium, and large) were considered in the simulation study developed using a geostatistical approach. The results showed that for parameter estimation of the spatial covariance function, Design III was better than the other designs at relatively small sample size and Design II performed better than the other designs at relatively large sample size. For estimating fish stock abundance, the performance of the designs considered in this study can be ranked as follows: Design II > Design IV > Design III > Design V > Design I. It is clearly important to evaluate and improve sampling design based on historical survey data. Such a study allows us to identify an optimal sampling design to balance the quality of the data collected and the costs of the sampling programme, leading to the development and optimization of a sustainable and fishery-independent monitoring programme.

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Optimal sampling design for spatial capture‐recapture

Ecology ◽

10.1002/ecy.3262 ◽

2020 ◽

Author(s):

Gates Dupont ◽

J. Andrew Royle ◽

Muhammad Ali Nawaz ◽

Chris Sutherland

Keyword(s):

Sampling Design ◽

Optimal Sampling ◽

Optimal Sampling Design ◽

Capture Recapture

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Optimal sampling design and minimal effort for soil charcoal analyses considering the soil type and forest history

Vegetation History and Archaeobotany ◽

10.1007/s00334-017-0624-0 ◽

2017 ◽

Vol 26 (6) ◽

pp. 627-637 ◽

Cited By ~ 3

Author(s):

Thomas Feiss ◽

Hélène Horen ◽

Boris Brasseur ◽

Jonathan Lenoir ◽

Jérôme Buridant ◽

...

Keyword(s):

Soil Type ◽

Sampling Design ◽

Forest History ◽

Optimal Sampling ◽

Soil Charcoal ◽

Optimal Sampling Design ◽

Minimal Effort

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Planning of experiments for a nonautonomous ornstein-uhlenbeck process

Tatra Mountains Mathematical Publications ◽

10.2478/v10127-012-0011-2 ◽

2012 ◽

Vol 51 (1) ◽

pp. 101-113 ◽

Cited By ~ 2

Author(s):

Vladimír Lacko

Keyword(s):

Sampling Design ◽

Information Matrix ◽

Mean Reversion ◽

Time Dependent ◽

Optimal Designs ◽

Optimal Sampling ◽

Uhlenbeck Process ◽

Optimal Sampling Design ◽

Ornstein Uhlenbeck Process ◽

Planning Of Experiments

ABSTRACT We study exact optimal designs for processes governed by mean- -reversion stochastic differential equations with a time dependent volatility and known mean-reversion speed. It turns out that any mean-reversion It¯o process has a product covariance structure.We prove the existence of a nondegenerate optimal sampling design for the parameter estimation and derive the information matrix corresponding to the observation of the full path. The results are demonstrated on a process with exponential volatility.

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Sampling of soil moisture fields and related errors: implications to the optimal sampling design

Advances in Water Resources ◽

10.1016/s0309-1708(00)00033-6 ◽

2001 ◽

Vol 24 (5) ◽

pp. 521-530 ◽

Cited By ~ 16

Author(s):

Chulsang Yoo

Keyword(s):

Soil Moisture ◽

Sampling Design ◽

Optimal Sampling ◽

Optimal Sampling Design

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A Proposal of Optimal Sampling Design Using Infrastructure Modularity

Procedia Engineering ◽

10.1016/j.proeng.2017.03.270 ◽

2017 ◽

Vol 186 ◽

pp. 559-566

Author(s):

Antonietta Simone ◽

Luigi Berardi ◽

Daniele Laucelli ◽

Orazio Giustolisi

Keyword(s):

Sampling Design ◽

Optimal Sampling ◽

Optimal Sampling Design

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Spatial distribution of sardine (Sardinops sagax) eggs and larvae: an application of geostatistics and resampling to survey data

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f99-012 ◽

1999 ◽

Vol 56 (6) ◽

pp. 907-914 ◽

Cited By ~ 12

Author(s):

W J Fletcher ◽

Neil R Sumner

Keyword(s):

Spatial Distribution ◽

Survey Data ◽

Ordinary Kriging ◽

Sampling Design ◽

Optimal Sampling ◽

Bootstrap Resampling ◽

Two Dimensional ◽

Optimal Sampling Design ◽

Sardinops Sagax ◽

Eggs And Larvae

The abundance of eggs and larvae of sardine (pilchard) (Sardinops sagax) off the south coast of Western Australia was investigated using geostatistical and bootstrap resampling techniques. A two-dimensional correlogram showed that the patch of newly spawned pilchard eggs had dimensions of 8 nautical miles (M) in diameter in the offshore direction and 10 M in the alongshore direction. For older stages, the size of the patch tended to increase and the level of cohesion decrease. It was more difficult to determine the size of the patch from directional variograms. The abundance of 1- and 2-day-old eggs in the study area was estimated using ordinary kriging. A bootstrapping analysis suggested that the optimal sampling design for day 1 eggs should use 4 × 10 M grids, an increase in intensity on the 5 × 15 M grids used in previous surveys.

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Financial Analysis of Airlines As Air Cargo Terminal Operator (The Case of Garuda Indonesia)

KnE Social Sciences ◽

10.18502/kss.v4i6.6633 ◽

2020 ◽

Author(s):

Raniyah . ◽

Dony Abdul Chalid

Keyword(s):

Comparative Study ◽

Business Model ◽

Scenario Analysis ◽

Financial Analysis ◽

The Other ◽

Air Cargo ◽

Study Analysis ◽

Better Than

PT. Garuda Indonesia Tbk is the only one of the airlines in Indonesia that operates as non-integrated cargo services and manages air cargo terminal service. This study aims to assess and evaluate the business model of airlines as an air cargo terminal operator. Correspondingly, to analyze the business model, the airline is run as an air cargo terminal operator on its own compared to if the cargo services outsourced to other parties at the terminal. The analysis will conduct by performing financial analysis and comparative study analysis. After that, scenario analysis will lead and decided the priority of air cargo business. The result is when the company decides to outsource the business to the other party is better than if they run by themselves. From scenario analysis results, it shows that all the scenarios of the outsourced still better compared to if they run their business by themselves. Keywords: Air Cargo, Terminal Operator, Financial Analysis, Warehouse Revenue, Comparative Study, Scenario Analysis

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Comparative study of user friendliness of paperless partogram compared to WHO partogram in preventing prolonged labour

International Journal of Reproduction Contraception Obstetrics and Gynecology ◽

10.18203/2320-1770.ijrcog20185429 ◽

2018 ◽

Vol 8 (1) ◽

pp. 229

Author(s):

Faswila M. ◽

Smitha B. Rao

Keyword(s):

Cost Effectiveness ◽

Comparative Study ◽

Ease Of Use ◽

The Other ◽

User Friendliness ◽

Learning Time ◽

Prolonged Labour ◽

Uterine Contractions ◽

Monitoring Progress ◽

Better Than

Background: Partogram is being used since 1954 when Friedman described it for monitoring progress of labour. The Paperless Partogram proposed by Dr. Debdas is a low-skill method for detection of abnormal labour. The objective of the present study was to know efficacy and user friendliness of paperless partogram in comparison with WHO partogram in monitoring and management of labourMethods: It’s a comparative study. Total of 100 patients were included in the study where half of the patients were monitored by paperless partogram and the other half by WHO modified partogram. The plotting of the WHO partographs started as soon the cervical dilatation was 4 cm along with regular painful uterine contractions. In the paperless partogram calculation will be two times, an ALERT ETD (estimated time of delivery) and an ACTION ETD. The outcome of labour will be recorded at the end of each partographs.Results: Paperless partogram was better than WHO partogram in terms of documentation, ease of use, learning, time factor, cost effectiveness and monitoring of labour, identification of abnormal labour.Conclusions: In present study paperless partogram was found to be preferred for monitoring of labour.

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