The flowchart of pair match between point cloud and point cloud .

The flowchart of pair match between point cloud and point cloud .</p

The illustration on the selection of check points in the neighborhood of base points(<i>AB</i> is a pair of points in and <i>A</i>′<i>B</i>′ is in ).

The illustration on the selection of check points in the neighborhood of base points(AB is a pair of points in and A′B′ is in ).</p

The flowchart of verification with local compatibility check.

The flowchart of verification with local compatibility check.</p

The illustration of models for the assessment.

In this research, we use hash match of invariants under fixed pair length and local compatibility check of positions or normal vectors to improve the efficiency of two-point normal set (2PNS) point cloud registration algorithm. On the one hand, we use the key value formed by the invariants of base point pairs of fixed length to construct and retrieve the hash table to realize the matching of base point pairs in the two point clouds to be registered to speed up the extraction of candidate transformation matrices. On the other hand, the time consumed in the verification phase is reduced by checking the compatibility between the positions or normal vectors of the corresponding points in the specific areas of the two point clouds under the transformation from the candidate matrix. Through these two improvements, the algorithm significantly reduces the time spent in the point cloud registration algorithm.</div

Comparison of registration efficiency and accuracy.

Comparison of registration efficiency and accuracy.</p

Dynamics of Vegetation change and Its Relationship with Nature and Human Activities — A case study of Poyang Lake Basin, China

Vegetation coverage directly affects the quality of a regional ecological environment. Current analyzes of the factors driving vegetation coverage do not focus on human activities. Poyang Lake is an internationally important wetland. This study is based on 814 MODIS normalized difference vegetation index (NDVI) data from 2000 to 2017 in the Poyang Lake Basin. Natural effects (temperature, precipitation, terrain niche index) and human activity intensity are employed to analyze the driving forces of NDVI changes. The results demonstrate the following: NDVI in the Poyang Lake Basin fluctuated and increased over the 18 years examined. Spatially, NDVI significantly decreased around the central city, and NDVI significantly increased on both sides of the river. NDVI changes are less affected by topographic factors and are more affected by climatic factors and human activities. Among the climatic factors, the correlation between NDVI and temperature was greater than that between NDVI and precipitation. Climatic factors had a greater impact on NDVI than human activities throughout the study area. However, in areas with significant NDVI changes, the correlation between climatic factors and NDVI was not obvious, and the correlation between human activities and NDVI was more obvious than in other areas. Therefore, from 2000 to 2017, the vegetation coverage of the Poyang Lake Basin generally showed an increasing trend; climatic factors had a greater impact on the overall vegetation coverage of the basin than human activities, but significant changes in vegetation coverage were caused by human activities.</p

Germination properties of barley seeds treated with uncomposed and composted <i>A</i>. <i>adenophora</i> extracts (UCAE and CAE, respectively).

On each column, data marked with different small letters are significantly different at P A. adenophora extract; CAE = composted A. adenophora extract. Unit for UCAE and CAE is mg L-1.</p

Effects of uncomposted and composted <i>A</i>. <i>adenophora</i> on soil enzyme activities.

Effects of uncomposted and composted A. adenophora on soil enzyme activities.</p

S1 File -

(RAR)</p

Chemical properties of uncomposted and composted <i>A</i>. <i>adenophora</i>.

Chemical properties of uncomposted and composted A. adenophora.</p