The Pattern‐Transformation Model of Pitch

1973 ◽  
Vol 53 (1) ◽  
pp. 315-315
Author(s):  
Frederic L. Wightman
Keyword(s):  
Transformation Model ◽  
Pattern Transformation

scholarly journals Transformation of Rural Landscape Patterns in Southwest China's Mountain: A Case Study Based on the Three Gorges Reservoir Area

2021 ◽  
Author(s):  
Mingzhen Li ◽  
Xie Yuxuan ◽  
Yangbing Li
Keyword(s):  
Land Use ◽  
Landscape Pattern ◽  
Southwest China ◽  
Rural Landscape ◽  
Transformation Model ◽  
Mountainous Areas ◽  
Rural Revitalization ◽  
Landscape Types ◽  
Pattern Transformation

Abstract Since the 21st century, China's rural areas have experienced far-reaching social and economic transformation. Studying the evolution and transformation of rural land use landscape pattern under this background is of great significance to reveal the evolution of human-land relationship in China’s mountains and explore the rural revitalization path. Based on the study of land use change and transition, we put forward the theoretical framework of landscape pattern transition, and establish the rural landscape pattern transformation model of mountain area in southwest China by use of high resolution remote sensing images and field investigation. The results show that: (1) The focus of landscape pattern transformation in the case region is mainly embodied in the reduction of cultivated land, the expansion of orchard and the restoration of woodland. There are obvious differences in landscape pattern transition among different terrain areas in the case region. (2) From 2000 to 2018, the landscape types in the valleys of the study area were gradually diversified, there was a concentration of intensive land use types, and the landscape types in mountainous and hilly area were gradually simplified, and forest land was restored. (3) On the whole, the landscape pattern of the study area has changed from production-oriented landscape pattern to eco-economic landscape pattern and eco-regulatory landscape pattern. The results of case study show that the rural landscape pattern in the mountainous areas of Southwest China has undergone a transformation under the background of land use transformation, which has its own particularity, and verifies the theoretical hypothesis proposed in this paper, so it is necessary to conduct a systematic and in-depth study on this. The theories and methods of this paper are helpful to understand the process of landscape pattern transition in mountainous areas, and provide reference value for the rational use of land resources, ecological management and rural revitalization in similar mountainous areas.

The pattern‐transformation model of pitch

1973 ◽  
Vol 54 (2) ◽  
pp. 407-416 ◽  
Author(s):  
Frederic L. Wightman
Keyword(s):  
Transformation Model ◽  
Pattern Transformation

Human Rights in a Neoliberal World

2017 ◽  
Author(s):  
Madeline Baer
Keyword(s):  
Human Rights ◽  
Social Transformation ◽  
Water Policy ◽  
Empirical Work ◽  
Transformation Model ◽  
Central Research ◽  
Transformative Change ◽  
Human Right ◽  
Regulatory Frameworks ◽  
Negative Effect

Chapter 2 presents the central research questions that drive the theoretical and empirical work of the book, outlines the “moments of social transformation” model used for analyzing human rights realization, and positions the book in relation to theoretical and contemporary policy debates. The chapter synthesizes the literatures on socioeconomic human rights fulfillment and the human right to water and sanitation. It introduces two key elements for implementing human rights: political will and state capacity, as well as some obstacles to rights realization, including lack of strong regulatory frameworks and accountability mechanisms. The chapter explores the tensions between markets and rights, finding that neoliberal approaches to water policy have a negative effect on rights fulfillment by weakening the state’s role, and it engages with critiques that the human rights frame is too narrow and vague to facilitate transformative change in the water sector.

scholarly journals Exploring the Distribution of Traffic Flow for Shared Human and Autonomous Vehicle Roads

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3425
Author(s):  
Huanping Li ◽  
Jian Wang ◽  
Guopeng Bai ◽  
Xiaowei Hu
Keyword(s):  
Traffic Flow ◽  
Autonomous Vehicles ◽  
Flow Model ◽  
Road Traffic ◽  
Autonomous Vehicle ◽  
Transformation Model ◽  
Hydrodynamic Theory ◽  
Traffic Flow Model ◽  
Traffic System ◽  
The Stability

In order to explore the changes that autonomous vehicles would bring to the current traffic system, we analyze the car-following behavior of different traffic scenarios based on an anti-collision theory and establish a traffic flow model with an arbitrary proportion (p) of autonomous vehicles. Using calculus and difference methods, a speed transformation model is established which could make the autonomous/human-driven vehicles maintain synchronized speed changes. Based on multi-hydrodynamic theory, a mixed traffic flow model capable of numerical calculation is established to predict the changes in traffic flow under different proportions of autonomous vehicles, then obtain the redistribution characteristics of traffic flow. Results show that the reaction time of autonomous vehicles has a decisive influence on traffic capacity; the q-k curve for mixed human/autonomous traffic remains in the region between the q-k curves for 100% human and 100% autonomous traffic; the participation of autonomous vehicles won’t bring essential changes to road traffic parameters; the speed-following transformation model minimizes the safety distance and provides a reference for the bottom program design of autonomous vehicles. In general, the research could not only optimize the stability of transportation system operation but also save road resources.

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