331 research outputs found
Clinical Assistant Diagnosis for Electronic Medical Record Based on Convolutional Neural Network
Automatically extracting useful information from electronic medical records
along with conducting disease diagnoses is a promising task for both clinical
decision support(CDS) and neural language processing(NLP). Most of the existing
systems are based on artificially constructed knowledge bases, and then
auxiliary diagnosis is done by rule matching. In this study, we present a
clinical intelligent decision approach based on Convolutional Neural
Networks(CNN), which can automatically extract high-level semantic information
of electronic medical records and then perform automatic diagnosis without
artificial construction of rules or knowledge bases. We use collected 18,590
copies of the real-world clinical electronic medical records to train and test
the proposed model. Experimental results show that the proposed model can
achieve 98.67\% accuracy and 96.02\% recall, which strongly supports that using
convolutional neural network to automatically learn high-level semantic
features of electronic medical records and then conduct assist diagnosis is
feasible and effective.Comment: 9 pages, 4 figures, Accepted by Scientific Report
Understanding the cost of green buildings : Evidence from Singapore
Master'sMASTER OF SCIENCE (ESTATE MANAGEMENT
Analysis of Urban Impervious Surface in Coastal Cities: A Case Study in Lianyungang, China
Impervious surface is an important indicator of the level of urbanization. It is of great significance to study the impervious surface to promote the sustainable development of the city. In the process of urban development, the increase of impervious surface cities is bound to be accompanied by a reduction of one or more types of land use in the city. This paper, taking Lianyungang as an example, introduces the methods of extracting urban impervious surface based on VIS model, NDVI (normalized vegetation index), MNDWI (modified normalized water body index), and unsupervised classification, analyzes the changes of impervious surface in Lianyungang from 1987 to 2014, and on this basis, analyzes the trend and driving forces of land use types in Lianyungang city in depth. The results show that the impervious surface of Lianyungang increased by a total of 29.70% between 1987 and 2014. While the impervious surface continues to increase, the area of cultivated land and coastal areas (including salt works and tidal flats) has been greatly reduced, and the types of land use have undergone significant changes
Cavity-enhanced single photon emission from a single impurity-bound exciton
Impurity-bound excitons in ZnSe quantum wells are bright single photon
emitters--a crucial element in photonics-based quantum technology. But to
achieve the efficiencies required for practical applications, these emitters
must be integrated into optical cavities that enhance their radiative
properties and far-field emission pattern. In this work, we demonstrate
cavity-enhanced emission from a single impurity-bound exciton in a ZnSe quantum
well. We utilize a bullseye cavity structure optimized to feature a small mode
volume and a nearly Gaussian far-field transverse mode that can efficiently
couple to an optical fiber. The fabricated device displays emission that is
more than an order of magnitude brighter than bulk impurity-bound exciton
emitters in the ZnSe quantum well, as-well-as clear anti-bunching, which
verifies the single photon emission from the source. Time-resolved
photoluminescence spectroscopy reveals a Purcell-enhanced radiative decay
process with a Purcell factor of 1.43. This work paves the way towards high
efficiency spin-photon interfaces using an impurity-doped II-VI semiconductor
coupled to nanophotonics
Fault Injection based Failure Analysis of three CentOS-like Operating Systems
The reliability of operating system (OS) has always been a major concern in
the academia and industry. This paper studies how to perform OS failure
analysis by fault injection based on the fault mode library. Firstly, we use
the fault mode generation method based on Linux abstract hierarchy structure
analysis to systematically define the Linux-like fault modes, construct a Linux
fault mode library and develop a fault injection tool based on the fault mode
library (FIFML). Then, fault injection experiments are carried out on three
commercial Linux distributions, CentOS, Anolis OS and openEuler, to identify
their reliability problems and give improvement suggestions. We also use the
virtual file systems of these three OSs as experimental objects, to perform
fault injection at levels of Light and Normal, measure the performance of 13
common file operations before and after fault injection.Comment: 9 pages, 8 figure
Prototypical Contrast Adaptation for Domain Adaptive Semantic Segmentation
Unsupervised Domain Adaptation (UDA) aims to adapt the model trained on the
labeled source domain to an unlabeled target domain. In this paper, we present
Prototypical Contrast Adaptation (ProCA), a simple and efficient contrastive
learning method for unsupervised domain adaptive semantic segmentation.
Previous domain adaptation methods merely consider the alignment of the
intra-class representational distributions across various domains, while the
inter-class structural relationship is insufficiently explored, resulting in
the aligned representations on the target domain might not be as easily
discriminated as done on the source domain anymore. Instead, ProCA incorporates
inter-class information into class-wise prototypes, and adopts the
class-centered distribution alignment for adaptation. By considering the same
class prototypes as positives and other class prototypes as negatives to
achieve class-centered distribution alignment, ProCA achieves state-of-the-art
performance on classical domain adaptation tasks, {\em i.e., GTA5
Cityscapes \text{and} SYNTHIA Cityscapes}. Code is available at
\href{https://github.com/jiangzhengkai/ProCA}{ProCA
Review on the research of hydrogen storage system fast refueling in fuel cell vehicle: Review
International audienceA comprehensive review of the hydrogen storage systems and investigations performed in search for development of fast refueling technology for fuel cell vehicles are presented. Nowadays, hydrogen is considered as a good and promising energy carrier and can be stored in gaseous, liquid or solid state. Among the three ways, high pressure (such as 35 MPa or 70 MPa) appears to be the most suitable method for transportation due to its technical simplicity, high reliability, high energy efficiency and affordability. However, the refueling of high pressure hydrogen can cause a rapid increase of inner temperature of the storage cylinder, which may result not only in a decrease of the state of charge (SOC) but also in damages to the tank walls and finally to safety problems. In this paper, the theoretical analysis, experiments and simulations on the factors related to the fast refueling, such as initial pressure, initial temperature, filling rate and ambient temperature, are reviewed and analyzed. Understanding the potential relationships between these parameters and the temperature rise may shed a light in developing novel controlling strategies and innovative routes for hydrogen tank fast filling
A case report of multicentric reticulohistiocytosis with atypical cutaneous presentation
Multicentric reticulohistiocytosis (MRH) is a rare systemic disorder characterized by histiocytic hyperplasia that mainly involves the skin, mucous membranes, and joints. The typical clinical features include papules, nodules, and arthritis. MRH lesions are relatively extensive but small and scattered. Joint inflammation is characterized by diffuse symmetric polyarthritis as the first symptom, which can be severe and disabling due to destructive joint changes. MRH is easily misdiagnosed in clinical practice. Here, we report the case of an elderly male patient who presented with polyarticular pain in the hip and interphalangeal joints as the first manifestation, followed by the development of large, isolated, bulging skin nodules, which are atypical MRH lesions. This is rare in all MRH case reports, and we made the correct diagnosis by combining skin histopathology, immunohistochemistry, and other clinical examinations. We performed surgical treatment on the local skin lesions of this patient. This case suggests that clinicians should actively correlate the condition and accurately diagnose MRH when encountering atypical skin changes or other diseases as the first symptom and explore the mechanisms of MRH and other clinical manifestations
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