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With the development of internet, more and more criminals commit the crime via utilizing instant messaging services, which has aroused the forensic scientists’ interests simultaneously. And voice chat generated by those instant messaging services is generally treated as VoIP. This paper analyzes the...

A new video watermarking scheme against geometric distortions is proposed, which is most suitable for DCT-encoded compressed video, like MPEG-2, MPEG-4, H.264, etc. To lower the computational cost, 2-D DFT coefficients are constructed directly from the block DCTs by exploiting a fast inter-transformation....

Presently, the slowly development of DFT is mainly due to the lack of effective testability validation. The validation is an important part of the DFT, it will accurately detect equipment Fault Detection Rate (FDR), Fault Isolation Rate (FIR), Fault Alarm Rate (FAR) and make sure other important indicators...

This paper presents an approach of computing the parameters of quartz crystal microbalance (QCM) equivalent circuit model using the least squares algorithm in MATLAB. Modification of the measured data’s order in the least squares algorithm was implemented so that the precision was im-proved. Compared...

Effective and light weight, in terms of computational requirements robust encryption algorithms are preferable for data hiding and data security applica-tions. Steganography data hiding, watermarking for copy right protection, secure transmission of biometric data to local or remote sites for validation...

By using density functional theory (DFT) calculations, the phase stability of Ga3Zr with tetragonal (D022) and cubic (Ll2) structures under high pressure have been investigated. The equilibrium configurations have been obtained after geometry optimizations. The lattice parameters and formation energy...

A new copper(I) complex of [Cu(Flu-im-Py)(POP)]PF6 supported by Flu-im-Py =5-(9H-fluoren-2-yl)-2-(1H-imidazol-2-yl)pyridine, POP=bis(2-diphenylphosphanyl)ether, was synthesized and characterized. The corresponding photophysical properties were investigated using UV-vis and emission spectrometry. The...

In this paper, we study a new fast blind algorithm based on the generalized likelihood ratio test (GLRT) principle. It is used in an outdoor visible light communication (OVLC) system that uses OOK modulation with intensity modulation and direct detection (IM/DD) over atmospheric turbulence-induced slow...

Ab initio molecular orbital theory and density functional theory have been applied to investigate B7Cl- cluster. It is found that almost an inversion in stability occurs upon addition of one Cl to B7- cluster. Two low-lying planar(Cs,2A') structures are the lower energy minima, and the quasi-planar geometry...

Advances in digital signal processing technology allow it to be used for ever wider operations. Developers will be challenged to take this processing dominance to the extreme in creating new uses and improving existing ones. Numerous ways to reuse signals and images are now available. Several conformations...

The tongue diagnosis is an important diagnostic method in Traditional Chinese Medicine (TCM). Human tongue is one of the im¬portant organs which contain the information of health status. Image segmentation has always been a fundamental problem and complex task in the field of image processing and computer...

In recent years, computer and the network technology has been developing at breakneck speed, accompanied by a brand new digital era. With the further development of digitalization, an important issue has gradually emerged, that is, the security of digital content. In this context, a new digital technologies-digital...

The abnormal psychology is a required basic specialty course of applied psychol-ogy specialty, and the film teaching should be regarded as one of the im-portant teaching means for such course. Integrating the films relating to mental illness into abnormal psychology teach-ing has important effect and...

The mechanism of the HO2 + HN2 reaction has been investigated at the B3LYP/6-311++G (3df, 3pd) level. The single-point energy calculations are performed at the high-level CCSD (T) / 6-311++G (3df, 3pd) for more accurate energy values. For the HO2 + HN2 reaction, DFT calculations show the dissociation...

The development of college students’ critical thinking skills, related to the im-provement of our national quality and the growth of the national economy, is an urgent and important task in personnel training of colleges and universities. In major courses teaching, the schools should consciously train...

In the acquisition block of a real time re-ceiver for satellite communication, bit transition due to the navigation message may cause a correlation peak splitting, which will probably lead to a wrong es-timation of Doppler shift and code phase delay. In this paper, the impact of bit transition on the...

This paper examines the problem of recognition of col-ored objects for the NAO humanoid robot using camer-as. Based on the ability of fuzzy systems to approxi-mate any mapping, the input-output behavior between the triplet {H, S, V} and the linguistic output colors is represented by a Sugeno fuzzy system....

The study discussed the feasibility of CLUE-S model in Panjin in two different scenarios. Results showed that driving forces of land use in the model could simulated the land use in Panjin well, including slope, aspect, distance from river, density of population and so on. In the simulation in Panjin...

Signal processing method is one of important technological bases in the existing fault diagnosis of mechanical equipment, and the degree of accuracy of analysis results is the key factor for whether the diagnosis is successful. Research on spectral analysis is one of the existing main development directions....

In recent years, NoSQL databases have become essential for delivering Big data web services. As memory capacities increase, there is a heightened focus on In-memory NoSQL (IM-NoSQL) systems, which use dynamic random-access memory (DRAM) to enable minimal latency. However, because DRAM is volatile, IM-NoSQL...

First, the algorithm converts 3d models into an affine invariant space, in order to obtain rotation in-variance and scale in-variance of the model; then we transform the distance of the grid point to the center to a signal in frequency domain using one-dimensional DFT. We embed a watermark into the signal...

Software design process is one of the crit-ical processes in software development life cycle since it delivers a software de-sign specification basically used for im-plementation in order to deliver software meets user expectation. There are many tasks required different skills of design team members....

In order to solve the problem of inflexible parameter settings in traditional dynamic channelization structure, a weighted overlap-add (WOLA) filter bank is proposed to implement dynamic channelization structure. The filter bank is deduced and emulated through MATLAB. The simulation results show that...

The emergence of ubiquitous technolo-gies has completely reshaped the area of education in recent years. Mobile devices can be used to promote learning any-where and anytime, to foster lifelong learning and knowledge sharing, or to promote building a learning society. This paper is to describe the basic...

Channel estimation is one of the most significant technologies in the orthogonal frequency division multiplexing (OFDM) system and its accuracy will influence the performance of the whole system directly. Among all kinds of channel estimation algorithms, the least square'LS'estimation and the linear...

When using the chemical calculation method to study the adsorption, we should firstly find the preferential adsorption site of the catalyst surface. But at present, we often place the reactants in the typical adsorption sites, such as bridge position, vacancy and vertex position, to find the minimum...

An investigation on the energy band structures, density of states, elastic coefficients and Debye temperature of monoclinic ZrO2 and monoclinic Bi2O3 at ambient pressure was investigated via first-principles calculations based on density functional theory (DFT). The calculation results from the energy...

With the advancement of digital marketing, an increasing number of enterprises are adopting virtual idols (e.g., “Luo Tianyi”) as brand ambassadors, making the mechanism by which virtual idol endorsements influence brand loyalty a focal point for scholarly research. This study, targeting university students...

Two different phases of Ga3Zr with tetragonal (D022) and cubic (Ll2) structures under high pressure are investigated by using density functional theory (DFT) calculations. The elastic constants (Cij) and mechanical moduli, including bulk modulus (B) and shear modulus (G), are calculated under various...

Urban growth and the development of urban plans make cities grow and substantially alter, in relatively short time periods, their land covers and land uses (LULC). To take control of this urban growth, it is im-portant to create and update the LULC database. In this work, a method to automatically extract...

Hardware Trojan is easy to be embedded during IC’s design and manufacturing. Mostly used Trojan detection technique based on side-channel approach need a Trojan-free instance, and could not ensure Trojan-free instance’s consistent of schematic. With the help of scan chain, one of the widely used design...

As the network users increasing quickly, tourism website users’ reviews are be-coming more and more extensive and comprehensive with their demanding more and more individual. To cope with these changes on tourism website chal-lenges, it is necessary to improve values of tourism website. The writer analyzed...

Global corporate strategies are changing due to the demand for technology innovation and environmentally friendly business practices. Intelligent, clean, and eco-friendly technology are leading this transformation. Businesses may improve operational efficiency, boost economic development, and lessen...

The structural and electronic properties have been calculated with increased occupancy of fluorine upon hydrogenated silicene using first-principle DFT calculations. The indirect band gap has been observed for hydrogenated silicene. Band gap behavior has been changed with increasing fluorine occupancy...

Study aim explore application democracy deliberative on learning cooperative subject history. Learning cooperative Not yet can change perception negative participant educate that learning history boring. Learn-ing cooperative not yet push participant educate Study active. Accentuation study on discussion,...

The band structures and electronic structures of pristine and Ag-doped zinc blende ZnS were calculated with the ab-initio ultra-soft pseudopotential plane wave approximation method based on density functional theory (DFT). The results show that Ag-doping narrows the band gap of ZnS and the acceptor impurity...

3D virtual environment such as Second Life is very popular to assist trainees’ learning. However, the effects of learning performance are very in different studies. Learning performance is the most im-portant factor to decide how successful instruction is. This study not only uses task-technology fit...

The economic development of a country or a region is inseparable from human capital, while higher education is an im-portant factor to ensure that the quantity and quality of human capital, in other words, higher education provides human indemnification for the economic devel-opment. Conversely speaking,...

At present, most of the researches on how might ICT impact well-being are focused on specific psychological result. This paper discusses how peer and parental loneliness might be affected by ICT mediated social network with the perspective of networked individualism and social captital theory. In order...

In this work, a new covalent triazine framework based on phthalazinone-containing dinitrile building blocks was prepared by the dynamic nitrile-trimerization reaction. The FT-IR spectra of BCTF illustrated the characteristic peaks of the triazine at 1503 cm-1 and 1360 cm-1. The nitrogen sorption isotherm...

The article examines the algorithm for estimation of the risks of small business financing, based on the method of median distributions in the formation of the en-terprise's investment strategy with subsequent vector optimization of local evalua-tion criteria. The choice of the optimal method for estimation...

This paper studies the impact of generative artificial intelligence on educational innovation, and studies the instructional design innovation of 13 full-time teachers of economics major in a university. Generative AI assisted teachers to form new teaching cases increased by 87%, updated teaching content...

A new nanoscale hybrid material, where a nitrogen chain N8 is encapsulated inside a boron nitride nanotube, is studied by density Functional theory (DFT). The structure, NBO charges, binding energy and electronic property are calculated at the B3LYP-D3/6-31G(d) level of theory. It is found that the N8...

Based on the density functional theory (DFT), we predict electronic properties of the non-periodic structure and the periodic structure of carbon nanotubes (CNTs) and silicon nanotubes (SiNTs). In the simulation process, we studied how to increase the length of nanotubes or add H atoms to dangling bond...

A kind of DFT process used for signal operation in real time is proposed. The complicated environment for modern electronic counter and the appearance of new radar systems put forward a new lesson to sub-collect the signal and track the signal, especially in real time. With the background of high speed,...

The rapid development of information technologies has created suitable environment for construction of eLearning systems. The pivotal point of those systems lies in web technologies. Due to those technologies eLearning leads to a number of im- provements in: delivery, access, distributed author- ity,...

Based on the multimodal discourse analysis theory and constructivist learning theory, the paper embarks from the English teaching of ESP (English for specific purposes) professional and comes to the conclusion that IM ( instant messaging) software is not only the physical tool of interactive communication,but...

“Experimental Engineering” is an im-portant course of mechanical engineering in the University of Iowa. The purpose of this course is to help student improve pro-ficiencies to: 1) Design, assembling, and conduct an experiment; 2) Data analysis and results presentation. Authors were inspirited by the...

Digital signal processing is one of the core courses for several engineering specialties, and its theories include five kinds of Fourier transforms, i.e. FT, FS, DTFT, DFS and DFT. The understanding of the inherent relationship between them will directly affect the learning effect as well as the following...

The implementation of transform precoding is one of the important steps for SC-FDMA baseband signal generation of physical uplink shared channel in TD-LTE. According to the definition of transform precoding, the mixed radix DFT which is made up of the radix-2, radix-3, radix-5 should be realized, and...