Journal of Computer Science and Cybernetics
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Some problems on the functional dependency related to armstrong relations in the relational datamodel.
Journal of Computer Science and Cybernetics - Tập 14 Số 1 - Trang 1-8 - 2016
In the paper, we give some results to combinatorial algorithms for functional
dependency (FD for short) connecting the construction of Armstrong relations,
relation schemes, the FD-relation implication problem, and the FD-relation
equivalence problem. These algorithms play important roles in logical and
structural investigations of the relational data model. Now, they are know to
have exponential ...
A fast overlapping community detection algorithm based on label propagation and social network graph clustering coefficient
Journal of Computer Science and Cybernetics - Tập 38 Số 1 - Trang 31--46 - 2022
Detecting community structure on social network has been an important and
interesting issue on which many researchers have paid much attention and
developed applications. Many graph clustering algorithms have been applied to
find disjoint communities, i.e each node belongs to a single community. However,
for social network in particular, public communication network in general, most
of communities...
#Social network graph #overlapping communities #label propagation #clustering coefficient #belonging coefficient.
Geometrical correction and geo-referencing for automatic map data entry
Journal of Computer Science and Cybernetics - Tập 15 Số 2 - Trang 54-60 - 2016
This paper presents the method of Geometrical Correction and Geo-referencing for
Automatic Map Data Entry. We propose the method to find linear and polynomial
transformations. We transform relative coordinate system maps vectorized into
maps of projection coordinate systems. Be side, we use this method to merge two
pages of an image (a map) into a page. The paper also present the selecting most
ap...
Một số vấn đề truy vấn và cập nhật trong cơ sở dữ liệu có tính thời gian.
Journal of Computer Science and Cybernetics - Tập 20 Số 2 - Trang 162-170 - 2012
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Mô hình nền tảng máy chủ chia sẻ và bài toán vector packing trong cung cấp tài nguyên cho dịch vụ ảo hóa
Journal of Computer Science and Cybernetics - - 2014
Tối ưu hóa tài nguyên để cung cấp cho dịch vụ ảo hóa nhằm nâng cao hiệu suất
dịch vụ IaaS (infrastructure as a service), đáp ứng yêu cầu khai thác tài nguyên
hiệu quả trong Điện toán Đám mây là vấn đề đang được quan tâm hiện nay. Trong
bài báo này, chúng tôi nghiên cứu bài toán cung cấp tài nguyên đa chiều từ nền
tảng máy chủ chia sẻ cho dịch vụ ảo hóa, đưa ra công thức tính trên cơ sở bài
toán qu...
#Resource allocation #vector packing #cloud computing #linear programming.
Các thuật toán qui hoạch động song song để nhận dạng ảnh dựa trên đường biên
Journal of Computer Science and Cybernetics - Tập 6 Số 4 - Trang 6--15 - 2018
The dynamic programming is an important procedure for speed understanding and
image recognition. In this paper, the application of dynamic programming to
recognize the shape basing on its contour is recalled, then the parallenlism of
this process is analyzed and exploited. Some parallel dynamic programming
algorithms for evaluating the smallest value of the minimum intersegment
distance path in a...
Analyses of robust stablity of imc control systems
Journal of Computer Science and Cybernetics - Tập 14 Số 1 - Trang 19-25 - 2016
The IMC structure of control systems shows advantages over the other control
structures. The IMC structure permits US overcoming dificulties when a
limitation of actuating magnitude as well as nonlinearity of the plant must be
taken in account. The target of this paper is to describe the IMC control
systems and their stability robustness. In Section 2 the normal feedback
structure and the IMC stru...
Điều khiển các dây chuyền sản xuất linh hoạt
Journal of Computer Science and Cybernetics - Tập 11 Số 1 - Trang 1--9 - 2016
In the maner of system theory the manufacturing systems will be seen as a
complexity of technological process with some more of less flexible control
strategies. In this paper a complexity of technological process is considered.
Some basic configurations and adjustement possibilities of flexible
manufacturing systems are also provid.
Một số vấn đề cơ bản của hệ điều hành thời gian thực
Journal of Computer Science and Cybernetics - - 2016
This paper is concerned with the design of operating systems for realtime or
online computer systems. An online or realtime operating system must respond to
all critical demands in restricted times promply. After presenting the functions
and principles of design, some examples of using Realtime Operating System in
measurement and control are given for illustration.
Benchmarking NIPT algorithms on detecting numerical chromosome trisomy
Journal of Computer Science and Cybernetics - Tập 40 Số 2 - Trang 103--115 - 2024
Noninvasive prenatal test (NIPT) is a widely used screening method to detect
trisomy on chromosomes 13, 18, and 21. The lack of positive samples prevents us
from examining the performance of NIPT algorithms on detecting trisomy on other
chromosomes. Recently, we have introduced an efficient computational method to
generate positive samples with trisomy from negative samples. In this paper, we
appl...
#Non-invasive prenatal test (NIPT) #WisecondorX #VINIPT #CNVKit #Autosomal trisomy #Simulation.
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