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Compared with discrete variable quantum key distribution, the Continuous Variable Quantum Key Distribution (CVQKD) system has the advantages of simple equipment, low technical difficulty, and high channel capacity, in addition to unconditional security and detectability for wiretapping. In this paper, the laser light source control system realizes the control and adjustment functions of the photon quantum state, which was encoded with information. In order to generate the synchronous optical pulse signals, the Field Programmable Gate Array (FPGA), multi-channel Digital to Analog Converter (DAC), and micro power Analog to Digital Converter (ADC) were used to control the synchronous optical laser. The control of multiple amplitude modulators and phase modulators is achieved based on the FPGA and high-speed DAC. At present, the electronics performance test of the laser light source control system has been completed, and the results show that the requirements of the CVQKD system index are met.

The fast charging technology is an indispensable section in the development of the new generation electric vehicles, as it would provide a more convenient experience for customers during the usage. To achieve this technology, research works should be focused on both the fast charging infrastructure/station development as well as the lithium-ion (Li-ion) battery behaviors analyses during fast charging. In this paper, an electrochemical and thermal coupling model is implemented to simulate the battery performance under fast charging scenarios. More specifically, the effects of the battery internal parameters, such as electrode thickness and electrode electrical conductivity, on the electrochemical and thermal behaviors of the Li-ion battery during normal charges and fast charges are analyzed and discussed. The decrease of electrode thickness can to some extent alleviate the overpotential issue and improve the fast charging process, and it also significantly reduces the heat generation during the charging. Comparatively, increasing the electrical conductivity of the electrodes does not show any improvements on the battery fast charging.

Double frequency (DF) microseisms (0.12–0.4 Hz) are believed to be generated by nonlinear interaction between ocean waves traveling in opposite directions, and are often more energetic than the single frequency microseisms. Based on the traveling time for long period (LP) DF microseismic signals generated by typhoon Shanshan to the closest seismic stations, the mean velocity is estimated to be on the order of 20 m/s suggesting that the LPDF signals are generated near the coastal area. The typhoon intensity is estimated as a function of time. It seems to show a cubic power dependence on the maximum wind speed, in agreement with the previous finding based on data at 10–50 Hz.

Safety is the first priority of any energy storage system. In this paper, safety studies are performed on three types of 2.6 Ah lithium ion batteries: high-drain thin-electrode battery (Cell 1), cellphone battery (Cell 2) and 18650 type battery (Cell 3), which are different in geometry and internal parameters. The batteries' discharge behaviors are tested on a battery analyzer, and their performances in nail penetration are simulated with an electrochemical-thermal coupling model. It is found that both the battery geometry and internal parameters have significant effects on the performance and safety of battery. Cell 1, with the lowest internal resistance among all, has the minimal temperature variations during discharges, but its simulated temperature rise in penetration is dramatic, especially at the nail point. As the internal resistance of battery increases, Cell 2 and Cell 3 experience severer temperature elevations and significant losses of available power and capacity at high-rate discharges, but meanwhile, they show better thermal behaviors in penetration simulation, with the maximum temperatures of both keeping below 200oC.

In the paper, a methodology of highly efficient wireless power transmission in retinal prosthesis was presented. It is based on inductive coupled coil pair which is the most common method in medical implants. In the design, a class-E driver was used in the primary side. In order to reduce the dissipation in the retina, an improved half wave rectifier circuit was adopted to get effective voltage in the secondary side. Then the design is optimized by orcad/pspice9.2. The third part is the simulation result; the load voltage of design can reach 5 volts. The last part is conclusion.

Artificial retina aims for the vision recovery of patient with degenerated photoreceptors by stimulating the remained retinal neurons. As a part of stimulator, MEAs (microelectrode arrays) has been developed. The MEAs was designed based on the technique of MEMS (microelectro mechanical systems). The microelectrode arrays dimensions of about 3 mm times 3 mm times 20 mum. The simulations are carried out with respect to the press force yielded by the eyeball. The results validated the feasibility of the MEAs in mechanics. The structure and parameters concerning the artificial retina microelectrode arrays can be optimized using the results.