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The Unified Medical Language System (UMLS) is an important terminological system. By the policy of its curators, each concept of the UMLS should be assigned the most specific Semantic Types (STs) in the UMLS Semantic Network (SN). Hence, the Semantic Types of most UMLS concepts are assigned at or near the bottom (leaves) of the UMLS Semantic Network. While most ST assignments are correct, some errors...
Diabetes mellitus and obesity are becoming some of the most serious public health challenges in the world. To help researchers more quickly reveal the complex relationships existing between diabetes mellitus, obesity, and related diseases in the literature, and give them an inspiration to search the effective treatments for these diseases, we propose a novel model named as representative latent Dirichlet...
A novel PWM/PFM hybrid-mode auto-change technique for buck DC-DC converter is proposed. The proposed technique utilizes the comparator propagation delay to decide the mode changing point without adding complicated PMW/PFM hybrid-mode controller. The proposed concept enables compact and simple implementation of hybrid-mode buck DC-DC converter. Simulation results show that the buck DC-DC converter...
In existing uplink non-orthogonal multiple access (NOMA) schemes, complicated user pairing schemes are required to ensure differentiated arriving power at the access point, which may incur considerable scheduling overhead. To address this issue, we propose a novel rate-splitting NOMA scheme in this paper. In particular, each user information is “split” into multiple flows, which equivalently form...
In this paper, a statistical research is carried on the radar cross section reduction (RCSR) performance of diffuse metasurface composed of two-layer stacked-patch elements. The research focuses on the broadband RCSR behavior of the metasurface in specular direction. An advanced uniform random distribution of reflection phase is proposed for the diffuse metasurface to improve the broadband RCSR performance...
Proportional integral (PI) based Genetic Algorithm (GA) method is applied to a brushless direct current (BLDC) motor with time delay conditions in this study. This study first defines and conceptualizes BLDC and PI controller with time delay conditions. Then describe a GA methodology and the method of combining PI controller into controlling a BLDC motor on a digital signal processor platform. The...
In practical cladding processes, any small parameter variation may cause undesired geometry changes. Therefore, a fast and robust controller design is required to ensure the quality of the process. In this paper, a robust vision-based controller with a specified interval phase-margin performance for laser cladding processes is presented. First, a practical nonlinear laser cladding processes was modeled...
In this work, we have explored a new method which based on Bayesian assimilation for monitoring methane (CH4) emissions at different rice phenological stages. Specifically, we investigate two algorithms, one based on the ground-based radar scatterometer (GBRS) with full polarization (HH, HV, VH, and VV) and the other based on the mechanistic process of agricultural model concluded the parameters of...
In order to study the coherence characteristics of low-backscattering objects such as roads and rivers, we introduce a coherence estimation approach based on clustering method. When the approach is applied to multi-temporal high-resolution TerraSAR-X images in urban areas, the results show that the coherence of roads is higher than that of rivers and shadows. This indicates that coherence features...
Vegetation coverage is an important indicator for forecasting geological disasters in mountainous areas such as landslide. However, it is a challenge to extract vegetation coverage in complex terrain from SAR image. A major problem is that the variation of the backscatter coefficient of the same object varies with the local incidence angle. As a result, a large number of discrete points appear in...
Due to the important roles in relieving energy crisis and environmental pollution, electric vehicles have been developed greatly. Charging facilities are linked to electric vehicles closely, and the accuracy of the charging area and scale affect their applications to a great extent. Based on the transaction data of the charging facilities in a city of northern China, this paper calculates the occupancy...
Pavement life span is often affected by the amount of voids in the base and subgrade soils, especially the soil moisture content. Ground Penetrating Radar (GPR) is one of the desirable techniques to indirectly measure the in-situ soil moisture content through electrical properties of soils. The inversion using transmission line matrix method from GPR data is applied for converting moisture content...
This paper reports on an experiment conducted at the wind-wave tank in UESTC microwave chamber to characterize the C- and X-band radar return from water surfaces covering oil films when observed at different incidences. The measurements of Normalized Radar Cross Section (NRCS) with bi-objective calibration technique were carried out for full polarization and various wind speeds. Comparisons are performed...
This study proposed a new method of urban impervious surface extraction from very high resolution (VHR) imagery, by combining spatial and spectral unmixing and decision tree classification. Endmember classes were first defined, where two shadow endmembers were used. Spatial homogeneity and spectral purity were fused to extract endmembers, i.e., spatial and spectral endmember. A modified multiple endmember...
This paper made a coherence analysis to access the ability of snow extraction based on the Terra-SAR X-HH data, and develop a method using multi-temporal coherence combined with the traditional method. Two pairs of Terra-SAR data with the same temporal baseline and similar spatial baseline were chosen, before and after snowfall. Traditional method was used to remove the snow free area with relative...
In this paper, the dynamic programming algorithm (DPA) is firstly proposed to analyze microwave minor scattering from advanced Michigan microwave canopy scattering (MIMICS). According to the decision stages which divided by the incidence angle, we use the DPA to study the underlying submerge information under the vegetation. Simultaneously, constructed in the DPA, the multidimensional sequence of...
The link of wireless sensor networks used in home automation may be instable due to the effects of shadow fading. Designing a suitable routing algorithm to improve the packet delivery ratio and reduce the delay in shadow fading environment is strongly required, and therefore the Link-State-Aware Routing for Wireless Sensor Network in Home Automation (LSAR-WSNHA) algorithm is proposed. However, when...
Interest point detection is one of the key technologies in image processing and target recognition. This paper presents a new method for detecting interest points in digital images and computer vision problems based on complex network theory. We associate a directed and weighted complex network model to each image and then we propose three different algorithms to locate these key points based on three...
A user-centric no-cell (UCNC) framework has been proposed which enables different level coordination over a large number of TRPs. This paper presents some key technologies in UCNC framework with the focus on PoC of UL grant- free transmissions in UCNC architecture. Massive connectivity support is one of the three important scenarios in 5G networks. The challenges to support massive connectivity lie...
5G wireless networks are expected to support new applications demanding ultra high reliability and ultra low latency, such as self-driving cars, industrial control, and real-time gaming. Such services are known as ultra-reliable and low-latency communications (URLLC) targeting at 99.999% transmission correctness within 1 ms delay bound. Current Long Term Evolution (LTE) system is far from supporting...
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