Improving crucial details and selecting the optimal model for evaluating the chilling requirement of Paeonia lactiflora Pall. at low latitudes during four winters

2020 ◽  
Vol 265 ◽  
pp. 109175
Author(s):  
Xiaobin Wang ◽  
Danqing Li ◽  
Dong Zhang ◽  
Xiaohua Shi ◽  
Yun Wu ◽  
...  
Keyword(s):  
Chilling Requirement ◽  
Paeonia Lactiflora ◽  
Optimal Model ◽  
Low Latitudes

scholarly journals Evaluating the Comprehensive Performance of Herbaceous Peonies at low latitudes by the Integration of Long-running Quantitative Observation and Multi-Criteria Decision Making Approach

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jiaping Zhang ◽  
Xiaobin Wang ◽  
Dong Zhang ◽  
Shuai Qiu ◽  
Jianfen Wei ◽  
...  
Keyword(s):  
Decision Making ◽  
Ornamental Plants ◽  
Lower Latitude ◽  
Multi Criteria Decision Making ◽  
Paeonia Lactiflora ◽  
Humid Climate ◽  
Growth Cycles ◽  
Low Latitudes ◽  
Dry Climates ◽  
Hot Humid Climate

Abstract Enlarging the planting area of economic plants, such as the “Southward Planting of Herbaceous Peony” (Paeonia lactiflora. Pall), is significant for improving people’s lives. Peony is globally known as an ornamental because of gorgeous flowers and is mainly cultivated in the temperate regions with relatively cool and dry climates in the Northern Hemisphere. Promoting the landscape application of peony to the lower latitude regions is difficult because of the hot-humid climate. In this study, 29 northern peony cultivars and a unique Chinese southern peony, ‘Hang Baishao’, were introduced to Hangzhou, located in the central subtropics. Annual growth cycles, resistances and dormancy durations were measured, and crossbreeding between the southern and northern peonies was performed for six years, from 2012 to 2017. Based on data collected from the long-running quantitative observation (LQO), a multi-criteria decision making (MCDM) system was established to evaluate the comprehensive planting performance of these 30 cultivars in the central subtropics. ‘Qihua Lushuang’, ‘Hang Baishao’ and ‘Meiju’ were highly recommended, while ‘Zhuguang’ and ‘Qiaoling’ were scarcely recommended for the Hangzhou landscape. This study highlights the dependability and comprehensiveness of integrating the LQO and MCDM approaches for evaluating the introduction performance of ornamental plants.

The characteristics of transforming coordinates from the geocentric system WGS-84 for the Mercator projection under low latitudes conditions

2018 ◽  
Vol 940 (10) ◽  
pp. 2-6
Author(s):  
J.A. Younes ◽  
M.G. Mustafin
Keyword(s):  
Coordinate System ◽  
Satellite System ◽  
Programming Algorithm ◽  
Low Latitude ◽  
Model Calculations ◽  
Mercator Projection ◽  
Low Latitudes ◽  
Rectangular Coordinates ◽  
Global Navigation Satellite ◽  
Coordination Methods

The issue of calculating the plane rectangular coordinates using the data obtained by the satellite observations during the creation of the geodetic networks is discussed in the article. The peculiarity of these works is in conversion of the coordinates into the Mercator projection, while the plane coordinate system on the base of Gauss-Kruger projection is used in Russia. When using the technology of global navigation satellite system, this task is relevant for any point (area) of the Earth due to a fundamentally different approach in determining the coordinates. The fact is that satellite determinations are much more precise than the ground coordination methods (triangulation and others). In addition, the conversion to the zonal coordinate system is associated with errors; the value at present can prove to be completely critical. The expediency of using the Mercator projection in the topographic and geodetic works production at low latitudes is shown numerically on the basis of model calculations. To convert the coordinates from the geocentric system with the Mercator projection, a programming algorithm which is widely used in Russia was chosen. For its application under low-latitude conditions, the modification of known formulas to be used in Saudi Arabia is implemented.

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