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In recent ten years, a perception exists that the agricultural management and crop cultivars have been improved obviously. But the crop yield variation trend due to above reason remain unknown yet. To evaluate the main food crop (maize, soybean and rice) yield trend from 2007 to 2016, the MODIS product (MCD12Q2) was used to extract the mature date of different crops. A two-band variant of the enhanced...
The rain-fed agriculture dominates the agricultural production in Northeast China, which leads to the drought risk for crops growing. To assess the yields and necessity of irrigation for maize in the Three Northeast Provinces of China, the calibrated and validated WOrld FOod STudies (WOFOST) model was used to estimate maize yieldss in the regional scale after it was optimized by assimilating leaf...
This paper investigates the coordinated multipoint transmission (CoMP) in heterogeneous cellular networks (HCNs) by analyzing a cooperative scheme based on the maximum long-term average received power (MLRP). Using stochastic geometry, the outage probability (OP) and energy efficiency (EE) of a two-tier HCN operating under this scheme are derived, based on which the trade-off between OP and EE is...
Ultrametric matrices are hierarchically structured matrices that arise naturally in many scenarios, e.g. delay covariance of packets sent from a source to a set of clients in a computer network, interactions between multi-scale communities in a social network, and genome sequence alignment scores in phylogenetic tree reconstruction problems. In this work, we show that it is possible to complete n...
There are lots researchs about estimation of biological parameters such as vegetation cover (PVC), aboveground biomass and leaf area index by remote sensing satellite data. In this paper, we set nineteen remote sensing plots in the upstream regions of Shule River Basin, they are all 30meters*30meters. We used ASD to collect reflectance of vegetation at Transit time when Landsat TM is passing, there...
A cloud-based, highly consumable queuing service must provide extreme scalability, flexible models of consistency, and high availability in the presence of network partitions. CAP theorem states that at most two of the three properties - Consistency, Availability, and Partition Tolerance - can be achieved at the same time for any shared data system. This paper presents the design and implementation...
The paper researches the representative variable of the probability of informed trading, selecting CCER high-frequency trading data of Shanghai stock exchange from 2003.7.1 to 2003.12.31, adopting VAR model. Different from previous studies, the paper firstly accounts for the dynamic relationship between trade and price. Then, the content of information in trading volume, duration and trading direction...
First, this paper constructs a financial evaluation system, and then directly against the various relative importance of evaluation system at all levels and indicates, and the difficulty to determine scientifically to set up determine matrix of all levels, and use AHP to determine the financial evaluation index weight and conduct a strict consistency test of the level of single-sort, and a total sort...
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