Browsing Bài báo khoa học by Title
Now showing items 6-25 of 148
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Các trường hợp đặc biệt và một số ứng dụng của phân bố alpha ổn định
(Đại học Dân lập Hải Phòng, 2013)Trong bài báo này, chúng tôi nghiên cứu về tính chất, các dạng suy biến cũng như một số ứng dụng cụ thể của phân bố alpha ổn định dựa trên các kết quả đo lường, khảo sát thực tế tại Việt Nam. -
Các trường hợp đặc biệt và một số ứng dụng của phân bố Alpha ổn định
(Đại học Dân lập Hải Phòng, 2015)So sánh với phân bố Gauss, phân bố alpha ổn định có hàm đặc trưng tiệm cận đến 0 chậm hơn nhiều nên còn được gọi là phân bố có đuôi dài. Trong các trường hợp đặc biệt phân bố này có thể suy biến về phân bố Gauss. Trong ... -
Chế tạo than hoạt tính từ vỏ trấu và ứng dụng xử lý Mangan trong nước thải
(Đại học Dân lập Hải Phòng, 2013)This article studies manufacturing activated carbon from rice husk husk by oxidation by concentrated sulfuric acid and initial application of activated carbon as adsorbent obtained manganese in effluent. -
Chế tạo than hoạt tính từ xơ dừa và ứng dụng xử lý Nitrit trong nước thải
(Đại học Dân lập Hải Phòng, 2013)This work studies the activated carbon made from coconut fiber and waste water treatment capabilities of this type of activated carbon. The results showed that this adsorbent has good adsorption capacity and nitrite ions ... -
Chủ động đào tạo và những chính sách chia sẻ đến nhân lực ngành du lịch trong thời kỳ đại dịch Covid-19
(Thiết bị giáo dục, 2022)In the context of the global Covid-19 pandemic, many opportunities and challenges will be created for Vietnam’s tourism industry. It must be said that human resources are affected the most. Therefore, in order to keep pace, ... -
Conference Proceedings Book Series-EPBS10-2023
(European Knowledge Development Institute, 2023)10th EUROKD International Hybrid Conference on Education, Psychology, and Behavior Science -
A Coverage and Connectivity of WSN in 3D Surface Using Sailfish Optimizer
(Springer, 2021)Coverage and connectivity in the 3D surface of sensor nodes as the mountain is a critical problem in a wireless sensor network (WSN). This paper suggests a solution to multi-connectivity deployment WSN coverage based on ... -
A Data Hiding Approach Based on Reference-Affected Matrix
(Springer, 2020)Data security has got many remarkable achievements. However, the issues of the lower distortion and the higher embedding capacity in the embedded secret data in media have not much been considered by scholars. This paper ... -
Design and fabrication of rectenna topologies for microwave power transmission system operating at S band
(Đại học Dân lập Hải Phòng, 2014)This paper describes the design, simulation and fabrication of two rectifying antenna (rectenna) circuit topologies viz. rectenna using half wave series diode and shunt diode half wave rectifier operating at a single ISM ... -
Design and Implement Circuit of Wireless Charging of Parking Management System
(Springer, 2021)This paper presents a designing and implementing circuit of wireless charging of the parking management system based on Radio frequency identification (RFID) technique and STM32F103 as the control kernel. The advantage of ... -
Design and implementation of driver amplifier for Wilkinson power divider operating at S band
(Đại học Dân lập Hải Phòng, 2014)In this paper, we introduce an overview of microwave power transmission system (MPT) including of power transmitter, free space transmission, rectenna. Also, the paper particularly presents in detail the proposed configuration ... -
Designing and implementing an integrated base-physic experiments device
(Đại học Dân lập Hải Phòng, 2012)Design and implementation a smart device based on physical and electronic scientific analysis is presented in this paper. This device is able to measure four physical parameters and indicate the obtained results on a LCD ... -
Designing and manufacturing of the Wilkinson power divider used in wireless transmission power systems at S - band
(Đại học Dân lập Hải Phòng, 2014)This paper presents the design, fabrication for four - line Wilkinson power divider/combiner using for the system wireless energy transfer band S. Power divider WPD (Wilkinson Power Divider) divides the signal from the ... -
A Detection for Positioning Sensor Node Based on Multilayer Perceptron
(Springer, 2021)Node positioning accuracy and the environmental impact on devices in wireless sensor networks (WSN) have been paid attention much by scholars recently. This paper proposed a prediction method for the sensor node positioning ... -
Does foreign direct investment matter for economic growth in Asean countries?
(Thanh niên, 2021)Does Foreign Direct Investment (FDI) stimulate economic growth of the host country? Empirical evidences have been mixed in the cases of developed, developing and transitional economies. There remain gaps in the literature. ... -
Does the indexx of country similarity in size induce FDI inflows into Vietnam?
(Đại học Dân lập Hải Phòng, 2014)International investment includes two main types: foreign direct investment (FDI) and portfolio investment or foreign indirect investment (FII). The International Monetary Fund (IMF) defines foreign direct investment as ... -
E-Learning and Learner Autonomy in an EFL Class in Vietnam
(Higher Colleges of Technology, Dubai, UAE, 2022-03)Learner autonomy has long been a matter of great interest in the world of EFL pedagogy and practice. It is one of the qualities that teachers want to cultivate as they know that developing this core value is synonymous ... -
An Enhanced Bats Algorithm for Optimization Thresholds in Medical Image Segmentation
(Springer, 2022)The key to threshold segmentation is choosing the thresholds that will decide the segmentation's outcome— as the number of thresholds grows, so does the calculation complexity, which causes challenges with traditional ... -
An Enhanced Harmony Search Algorithm for Cascade Reservoirs Planning
(Springer, 2022)A fair, efficient, and reasonable strategy for benefit transfer to multistakeholders is critical for preserving cooperation stability and development sustainability for cascade reservoirs under current comprehensive watershed ... -
An Enhanced Moth Flame Algorithm for Peak Load Distribution Optimization
(Springer, 2022)Peak load distribution optimization (PLD) is a typical multi-constrained nonlinear optimization problem considered an essential vital part of the power system to achieve energy-saving and consumption reduction. This study ...
