The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Based on measurement of AC impedance, this paper presents a new method for evaluating measurement uncertainty of AC impedance. The method of equal potential measurement is introduced, which can calibrate AC impedance and trace to voltage ratio standard and phase standard by adjusting the current in the circuit. What's more, the measurement data of 1 kHz, 100 Ω is given in the paper, whose measurement...
Plasmon resonance based biosensors are considered as one of the most sensitive bio detection methods, in which the sensitivity is of the order of a single biomolecule due to extremely high enhancement of the electromagnetic field. Although established metal plasmonic biosensors are extremely sensitive, they suffer from integration issues due to non-compatibility to standard semiconductor fabrication...
The details of switching behavior of spin transfer torque magnetic random access memory (STT-MRAM) are important for the scientific understandings as well as the technical reasons.
Dynamical control from the boundary of a membrane with edge mass and control is mathematically modelled and then the mathematical model is reduced to an abstract evolutionary equation with principal differential operator being Friedrichs extension of the original dissipative and symmetric operator. Using spectral/eigenspace analysis it is established that this evolutionary system is approximately...
One of the key issues for the practical application of the current-induced spintronic devices is of reducing the critical current (Ic0) for the current-induced magnetization reversal. The perpendicular magnetic anisotropy (PMA) and high spin polarization of the ferromagnetic layer are theoretically predicted and experimental verified to be useful for reducing the critical current of the magnetic reversal...
The coercivity enhancement of Nd-Fe-B based magnets is one of the key focuses for the related investigations because the experimental achieved coercivity is far less than the magnetic anisotropy field of the tetragonal Nd2Fe14B phase. Recently, the very high coercivities have been achieved in the sputter deposited Nd-Fe-B thick films and Nd-Ag diffused thin films [1]. However, it was experimentally...
Exchange bias effect is the unidirectional anisotropy induced by the interface between ferromagnetic (FM) and antiferromagnetic (AFM) layers below the Neél temperature of antiferromagnetic materials, leading to a shift of hysteresis loop. The effect of exchange bias has been studied for many years because of its possible application in spintronics, especially in spin valves for magnetic recording...
Ferromagnetic materials with perpendicular magnetic anisotropy (PMA) have great attention due to the high thermal stability and low switching current density for next generation memory devices such as spin-transfer-torque magnetic random access memory (STT-MRAM). The amorphous CoSiB/Pt multilayers are one of PMA candidates as STT-MRAM free layers and domain wall (DW) logic devices.[1] In this paper,...
In this paper, we consider and study how to automatically select the regularization parameter in a color total variation minimization model for image restoration. The idea is based on that the variance of the noise can be estimated easily, thus the restored image should satisfy the Morozov discrepancy principle. We developed an iterative scheme to solve the color total variation (CTV) minimization...
On-chip single-to-balanced bandpass filters with wide upper stopband are proposed. They are based on a simple multicoupled line structure along with loaded capacitors. The use of inductor is avoided so as to achieve very compact size when implemented on chip. Specifically, two single-to-balanced filters of 2nd- and 3rd-order bandpass response are demonstrated using the GaAs pHEMT process. Their chip...
In this paper, one structurally integrated composite antenna array conformed around cylindrical structures has been designed and fabricated. The experimental results show that the radiation pattern is strongly dependent on the cylinder curvature, while the array also exhibits high side-lobes and wider beamwidth. The results of impact test indicate that the value of the contact force decreases significantly...
The present work aims to integrate the antenna with the mechanical structure, therefore co-design electrically and structurally effective antenna structures, named composite smart structures (CSS). The design is focused electrically toward high gain and wide bandwidth, and mechanically toward high structural strength and low density (low-weight). For the antenna function, microstrip antennas are commonly...
Normal and cancerous tissues have distinct autofluorescence lifetime because of their biophysical and biochemical differences. Protoporphyrin IX (PplX) is a useful fluorophore, which generally accumulates more in cancerous cells than in normal cells due to heme synthesis pathway, is often employed in photodynamic detection and therapy. Under 410nm excitation, the main emission peak of PplX is at 630nm...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.