Greenway Planning of Guangdong Province

Guangdong Province is located in the southernmost region of mainland China with a total area of 180,000 square kilometers. The GDP ranks first in China, and the economic aggregate accounts for 1/8 of China’s total. As the economic development continues, the fragmentation of ecological land is becoming more dangerous. To solve this problem, the local government organized the master planning of environmental protection. The provincial greenway planning (also called ecological corridor) proposed in this paper is an essential part of it. The total length of planned greenways in Guangdong Province is 2,836 kilometers, and its primary function is biodiversity conservation. In the master planning of environmental protection, the planning of the ecological red line has already identified ecological patches. By constructing the provincial backbone greenway to connect ecological patches and form an ecological network, it can guarantee the ecological area of an economic priority development zone like Guangdong Province to provide sustainable ecosystem services. In this paper, the traditional Minimum Cumulative Resistance method (MCR) has been optimized based on graph theory, by using the betweenness of the edge (route or corridor) and selecting the least connected subgraph with the highest betweenness of the potential greenway by irreplaceable conditions to determine the irreplaceable backbone route and key strategic points. Under the premise of ensuring connectivity, the goal of planning the least number of greenways, the smallest footprint, and the constant value of ecosystem service is achieved. In this method, the backbone structure of the eco-network that maintains ecological security is established, nodes are found which are important hub locations in the eco-network but poor ecological conditions, and greenway route redundancy problem generated by the MCR method was solved, land resources and funds are saved, the guidance and control functions of the provincial greenway system are realized. The plan has been reviewed by the local government and entered the implementation phase

Robust Parameter Control based on Selecting Online Controllable Variables

AbstractRobust parameter design (RPD) is considered as a cost effective tool for reducing process variability. Robust parameter control, integrating RPD with automatic process control, will performance better than the traditional RPD approach. This paper proposed a strategy of robust process control based on selecting online controllable variables with consideration of generalized quality cost, which includes quality loss and manufacturing cost. Firstly, online controllable variables were selected and offline controllable variables were optimized in the design stage by minimizing the expectation of quality loss. Then, online controllable variables were adjusted during production according to the measurement of noise variables. Finally, the illustrative example showed that the proposed approach achieved lower quality cost

BGI Cross-Scale Coupling Space Connecting Regional Greenway and Community

At present, China is advancing its territory spatial planning, implementing the requirements of the Paris Agreement and the Convention on Biological Diversity through the construction of the GI, reducing the impact of urban development on climate change, improving ecosystem services, and maintaining sustainable urban development. Regional territory spatial planning provides a planning method for urban and regional green infrastructure. However, there is a lack of research on the green infrastructure construction mode connecting the boundary space of these two scales of greenway networks. Greenway systems must be highly connected to maintain basic ecological functions (Forman 1995, Urban 2001, Coulon 2004). In this paper, the concept of Boundary Green Infrastructure (BGI) is proposed, that is, the ecological space where the urban green infrastructure (UGI) network and regional green infrastructure (RGI) network intersect at the boundary of urban areas. BGI has the capability of connecting two levels of the greenway network. This paper selects greenway systems in six European cities as case studies. By calculating the patch landscape stability, the best BGI distance threshold range was determined, and the BGI range was determined by comparing the differences between patch importance indexes. This paper analyzes the spatial pattern of BGI and summarizes the BGI planning strategy suitable for the sustainable development of Chinese cities, which also provides a reference for the GI system in Europe. It has been proved that BGI can strengthen the connection between urban and regional greenway networks, improve ecological functions, and connect cross-scale greenway networks. Based on the above methods, this paper analyzes the current BGI indicators of Harbin (the capital of Heilongjiang Province, China) and optimizes the BGI of Harbin\u27s cross-scale greenway network. Thus, the landscape connectivity of the optimized greenway system can be improved, the ecological core area can be increased, and the ecological function can be advanced, which proves the feasibility of connecting the multi-scale greenway network with the BGI model