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Photoconductive terahertz detectors based on single GaAs/AlGaAs core-shell nanowire have been designed and fabricated. The devices were characterised in a terahertz time-domain spectroscopy system, showing excellent sensitivity comparable to the standard bulk ion-implanted InP receiver, with a detection bandwidth of 0.1 ∼ 0.6 THz. Finite-difference time-domain simulations were performed to understand...
This paper presents a new workforce allocation optimization model for project scheduling problems with multi-skilled workforce constraints (PSPMSWC), under uncertainty about the projects. The model is a mixed-integer program(MIP) model that aims at maximizing the total profit. As a subproblem, scheduling and staff assignment for projects must also be optimized. In the experiment, projects are selected...
In this paper, we define the concept of linguistic variable with interval confidence level (LVICL) and some operational laws of LVICLs. Based on these operational laws, we propose some new aggregation operators, such as the interval confidence linguistic weighted arithmetic averaging (ICLWAA) operator, interval confidence linguistic ordered weighted averaging (ICLOWA) operator and interval confidence...
This paper, based on Alter a Cyclone II FPGA, introduces a programmable sequence controller design scheme with a feature of multichannel (16 in this paper) and high-precision waveform output. The controller's output mode (single pulse and PWM pulse) and various parameters such as delay and duty cycle etc of each output pulse are independently adjustable, and high-precision output pulse could be adjusted...
In this paper, based on the representation of fuzzy structured element (FSE) of general fuzzy number intuitionistic fuzzy set and its operations, we define a score function of general fuzzy number intuitionistic fuzzy number (GFNIFN) for the comparison between any two GFNIFNs, and propose some new arithmetic aggregation operators based on FSE, such as the general fuzzy number intuitionistic fuzzy...
By making use of the advantages of Cuckoo Search (CS) algorithm and Particle Swarm Optimization (PSO), a hybrid optimization algorithm of PSO and CS was proposed. By CS-PSO, the search area of PSO was extended, and the defect of PSO is easily fall into point of local extremum that was improved. The simulation experiment results show that CS-PSO hybrid algorithm is better.
For traditional Automated Mechanical Transmission (AMT), the power is cut off while shifting, which results in shifting jerk and longer shifting time. In this paper, the integrated powertrain used in the EV is put forward, which includes the motor and the AMT, this integrated powertrain can control the motor speed and the AMT together. Then it analyzes the shifting process, and does some research...
The dynamics of the local field neural networks have been studied extensively, and many good results have been obtained. It should be pointed out that, the global robust stability for the static neural networks with time-delays received very little attention despite its practical importance. Based on the fixed point theory, Lyapunov functional and differential inequality technique, a new criterion...
Meshless method is a new numerical method on problem for determining solution of differential equation. The moving least squares approximation makes only require least squares approximation with regard to functional value at all nodes. It makes no require for the residual of derivative approximation. However, the generalized moving least squares approximation makes require least squares approximation...
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