Improving Selection of the Comparison Group from State Longitudinal Data Systems Using Two-Stage Matching

2016 ◽  
Author(s):  
Val Lazarev
Keyword(s):  
Longitudinal Data ◽  
Comparison Group ◽  
Data Systems ◽  
Two Stage ◽  
Stage Matching ◽  
Selection Of

Two-stage Matching and Pricing with Applications to Ride Hailing

2020 ◽  
Author(s):  
Yiding Feng ◽  
Rad Niazadeh ◽  
Amin Saberi
Keyword(s):  
Two Stage ◽  
Stage Matching

Characterization of Glycosphingolipids and Their Diverse Lipid Forms through Two-Stage Matching of LC-MS/MS Spectra

2021 ◽  
Vol 93 (6) ◽  
pp. 3154-3162
Author(s):  
Laura S. Bailey ◽  
Fanran Huang ◽  
Tianqi Gao ◽  
Jinying Zhao ◽  
Kari B. Basso ◽  
...  
Keyword(s):  
Two Stage ◽  
Stage Matching

scholarly journals The effects of social comparisons on subjective age and self-rated health

2021 ◽  
pp. 1-14
Author(s):  
Maayan Sayag ◽  
Gitit Kavé
Keyword(s):  
Older Adults ◽  
Comparison Group ◽  
Peer Group ◽  
Social Comparisons ◽  
Subjective Health ◽  
Subjective Age ◽  
Negative Effects ◽  
Younger Adults ◽  
Self Rated Health ◽  
Selection Of

Abstract Older adults consistently report young subjective age and provide high ratings of their subjective health. The current research examined which social comparisons older adults make when they assess their subjective age and health, as well as the effects of experimentally manipulated social comparisons on these assessments. In Study 1, 146 participants (aged 60 and over) reported to whom they compared themselves when assessing their subjective age or health. In Study 2, 100 participants (aged 60 and over) reported their subjective age and health after receiving feedback that compared them to younger adults or to their peers. Study 1 shows that participants compared themselves primarily to their peer group. Yet, individuals who selected a younger comparison group when assessing subjective age reported a younger subjective age, better self-rated health and more positive expectations regarding ageing relative to those who selected their peers as a comparison group. No equivalent differences emerged in any of the measures when participants were divided by their selection of comparison group after providing their self-rated health ratings. In Study 2, feedback that emphasised the performance of younger people led to reports of younger subjective age relative to feedback that emphasised peer performance, with no equivalent difference for self-rated health. These findings help explain why older adults feel younger and healthier than they actually are. We suggest that older adults use social comparisons as a strategy that protects them from the negative effects of ageing on self-perception.

scholarly journals Fingerprinting Acoustic Localization Indoor Based on Cluster Analysis and Iterative Interpolation

2018 ◽  
Vol 8 (10) ◽  
pp. 1862 ◽  
Author(s):  
Shuopeng Wang ◽  
Peng Yang ◽  
Hao Sun
Keyword(s):  
Cluster Analysis ◽  
Interpolation Method ◽  
Reference Points ◽  
Matching Method ◽  
Two Stage ◽  
Positioning Accuracy ◽  
Acoustic Localization ◽  
Database Construction ◽  
Iterative Interpolation ◽  
Stage Matching

Fingerprinting acoustic localization usually requires tremendous time and effort for database construction in sampling phase and reference points (RPs) matching in positioning phase. To improve the efficiency of this acoustic localization process, an iterative interpolation method is proposed to reduce the initial RPs needed for the required positioning accuracy by generating virtual RPs in positioning phase. Meanwhile, a two-stage matching method based on cluster analysis is proposed for computation reduction of RPs matching. Results reported show that, on the premise of ensuring positioning accuracy, two-stage matching method based on feature clustering partition can reduce the average RPs matching amount to 30.14% of the global linear matching method taken. Meanwhile, the iterative interpolation method can guarantee the positioning accuracy with only 27.77% initial RPs of the traditional method needed.

Two-stage method to remove population- and individual-level outliers from longitudinal data in a primary care database

2011 ◽  
Vol 21 (7) ◽  
pp. 725-732 ◽  
Author(s):  
C. Welch ◽  
I. Petersen ◽  
K. Walters ◽  
R. W. Morris ◽  
I. Nazareth ◽  
...  
Keyword(s):  
Primary Care ◽  
Longitudinal Data ◽  
Two Stage ◽  
Primary Care Database ◽  
Individual Level ◽  
Care Database

scholarly journals Research on Electronic Image Stabilization Technology of Vehicle-Mounted Remote-Controlled Weapon Station

2021 ◽  
Vol 2083 (3) ◽  
pp. 032061
Author(s):  
Shumin Qin ◽  
Lizhen Zhao ◽  
Xingke Tian ◽  
Lidan Li ◽  
Shuyun Liu
Keyword(s):  
System Design ◽  
Robust Stability ◽  
Sensor Data ◽  
Two Stage ◽  
Image Stabilization ◽  
Image Information ◽  
Gyro Sensor ◽  
Image Compensation ◽  
Stable Scheme ◽  
Selection Of

Abstract The image information of the vehicle-mounted remote-controlled weapon station is jittered and blurred when the stance changes or vibrates, which increases the aiming difficulty and observation fatigue of the shooter, in order to realize the stable marching fire of the vehicle-mounted remote-controlled weapon station, the two-stage stable scheme with the shared gyro sensor is adopted in the system design, namely, the aiming device is rigidly fixed on the initially stable weapon platform, and then the electronic image stabilization is carried out. This paper proposes an approach combining two image stabilization schemes: gyro sensor data and image projection registration, optimizes the selection of image compensation data by registering and comparing the results of the two stable data, and uses the special features of the two schemes to improve the robust stability of electronic image stabilization, which ensure the observation effect of video image stabilization of the vehicle-mounted remote-controlled weapon station.

Prevention of Historically Challenging Sustained Casing Pressure from Shallow Gas Through Re-Engineered Cement Design and Execution Methodology

2021 ◽  
Author(s):  
Farah Shakina Ezani ◽  
Myat Thuzar ◽  
Avinash Kishore Kumar ◽  
Chee Hen Lau
Keyword(s):  
Mitigation Measures ◽  
Design Parameters ◽  
Two Stage ◽  
Shallow Gas ◽  
Second Stage ◽  
The Past ◽  
Sustained Casing Pressure ◽  
Dual Stage ◽  
Casing Pressure ◽  
Selection Of

Abstract Sustained casing pressure (SCP) is a very costly event for any operator either at production phase or at the end of a well’s lifecycle. SCP is a result of incomplete hydraulic isolation across hydrocarbon bearing zone. In one of the gas fields in Malaysia, notoriously known for shallow gas hazard, drilled development wells which have reportedly been suffering SCP. In the past, various improvements in cement slurry design and placement methods were deployed in order to provide complete zonal isolation, especially at the shallow gas sand, yet SCP issue was encountered occasionally. In the current development campaign, different strategy to providing annulus sealing was adopted. This paper discusses proactive steps taken in the slurry design, fit together with the dual stage cementing approach, as a primary means of placing cement above the shallow hazard interval. During the design phase, essential key parameters that would lead to successful placement of cement in the annulus as well as unique slurry design that suits for two stage cementing methods were studied. Risk involved in first stage cementing is one of the most important steps that should be analyzed in detail and put mitigation measures in place to ensure the second stage cement job can be performed as planned. In addition to the slurry properties, such as fluid-loss value, gas-tightness, etc., thickening time and top of cement (TOC) of the lead slurry in the first stage cement job has become enormously critical in designing dual stage cementing job in order to assure cement ports in the stage collar are not covered with hard cement forcing the termination of second stage job prematurely. Besides cementing design, careful selection of the stage collar location and casing annulus packer in the string is also of significant importance in leading to successful two stage cement job. Two development wells with above approached has been delivered and no sustained casing pressure has been experienced. This proactive approach to use two stage cementing as primary plan has proven to successfully eliminate the risk of SCP, which was a frequent struggle in their sister wells drilled with primary cementing in the past in the same field. The risk analysis combined with careful considerations of critical cementing design parameters and selection of stage tool location have become a novel approach to combat against SCP in this gas field.

Above Ground Bioremediation: Two Stage Strategy for the Selection of Optimum Operation Conditions

1995 ◽  
pp. 1219-1220
Author(s):  
I. Gorostiza ◽  
M. Zallo ◽  
A. I. San Vicente ◽  
E. Quintana ◽  
I. Muguruza
Keyword(s):  
Two Stage ◽  
Optimum Operation ◽  
Operation Conditions ◽  
Selection Of

Two-Stage Non-Cooperative Game Model for Vertical Handoffs in Heterogeneous Wireless Networks

2021 ◽  
pp. 90-114
Author(s):  
Pramod Kumar Goyal ◽  
Pawan Singh
Keyword(s):  
Game Theory ◽  
Wireless Networks ◽  
Cooperative Game ◽  
Heterogeneous Wireless Networks ◽  
Substantial Reduction ◽  
Game Model ◽  
Two Stage ◽  
Vertical Handoffs ◽  
Cooperative Game Model ◽  
Selection Of

In a heterogeneous wireless network (HWN) environment, performing an efficient vertical handoff requires the efficient qualitative evaluation of all stakeholders like wireless networks (WN) and mobile users (MU) and mutual selection of best WN-MU. In the literature, most of the work deals with both these requirements jointly in the techniques proposed by them for the vertical handoffs (VHO) in HWNs, leaving very little scope to manipulate the above requirements independently. This may result in inefficient vertical handoffs. Hence, this chapter proposed a generalized two-stage two players, iterative non-cooperative game model. This model presents a modular framework that separates the quantitative evaluation of WNs and MUs (at Stage 1) from the game formulation and solution (at Stage 2) for mutual selection of best WN-MU pair for VHO. The simulation results show a substantial reduction in the number of vertical handoffs with the proposed game theory-based two-stage model as compared to a single-stage non-game theory method like multiple attribute decision making.

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