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To compare the different pregnancy outcomes of women with a reduced dichorionic triamniotic (DCTA) triplet managed with radiofrequency ablation (RFA) or potassium chloride (KCL).

Quantum steering plays a crucial role in quantum communication and one-way quantum computation. Here, we study quantum steering between two magnon modes in a cavity-magnonics system by applying a two-photon drive field to the microwave cavity. The two magnon modes are entangled and the one-way steering can be implemented when the four-wave mixing is triggered. Different from most schemes that use the dissipation of the system to control quantum steering, in our scheme the one-way steering can be modulated on demand by adjusting the coherent coupling ratio between the two magnons and the cavity, which provides a flexible and feasible way in experiments. We also reveal that the directionality of quantum steering is related to the mode populations, i.e., the mode with a larger population dominants the steering. Our study has high manipulability and may provide a promising platform for one-way quantum computing and communications based on macroscopic entanglement state.

The PBHC (Passivity Based Hybrid Controller, PBHC) with damping injection and neutral point potential balance was based on a dual-EL (Euler Lagrange, EL) model of three-level three-phase dual load NPC (Neutral Point Clamped, NPC) VSR (Voltage Source Rectifier, VSR) in dq reference frame. The simulation results from Matlab/Simulink show that the proposed control strategy has excellent performances: at the AC side, the THD (Total Harmonious Distortion, THD) is less than 5%, the PF (Power Factor, PF) is higher than 98%; at the DC side, the output voltage is able to track the desired voltage quickly, the capacitors votages are equal.

The mathematical model of three-phase voltage sources Pulse Width Modulation (PWM) rectifier is nonlinear, in view of the traditional linear control strategys weak disturbance-rejection ability with resistive and inductive load, a new passivity-based control strategy was proposed according to passivity-based control theory. Energy shaping method based on PCHD (Port Control Hamiltonian with Dissipation) model and the IDA-PBC (Interconnection and Damping Assignment Passivity Based Control) control algorithm is adopted to design passivity-based controller, which is able to make the energy function have the minimum value when rectifier is at the desired point, thus improving the stability and the load disturbance-rejection ability. Simulation results show that passivity-based control method can make this system possess the high-performance of robustness and dynamic.

TiN film deposited by mid frequency reactive magnetron sputtering process on aluminium alloys surface,which can improved the color of aluminium alloys.Use International Commission on Illumination(CIE) 1976(L*、a*、b*) to calibrate the film color,and use the photoelectric spectrocolorimeter of CM-2600d to research the influence of nitrogen flow rate, sputtering time to the film color.The results show that,TiN thin film color will be change from light yellow, yellow, golden yellow to deep yellow with the nitrogen flow rate and the sputtering time increased.When the nitrogen flow rate reach 18sccm and the sputtering time reach 15min,the color parameter will be L*= 83,a*= 2,b*= 30. At this point, the film thickness is 70nm,TiN thin films have golden yellow color, which have the excellent mechanical characteristic.

In order to study the effectiveness of aerobic units in removing oxytetracycline(OTC) and explore the effective method to measure OTC in wastewater, the different level of mixed liquor suspended solid(MLSS) and aeration quantity are test in OTC degradation in aerobic unit, the measuring methods are tested and optimized. The result shows that with the condition of (1)extraction buffer solution of NaCl(1mol/L) : oxalic acid(0.5mol/L) : ethanol = 25/25/50,v/v/v; (2) water(added phosphoric acid, pH=3) and acetonitrile as flow phase (V:V=75:25); (3) wavelength at 343 nm could achieve 0.9995 correlation coefficient between the concentration of OTC in the sample and peak area measured. The degradation/removal rate was influenced by aeration intensity, detention time and the mixed liquor suspended solids(MLSS) in the treatment units, and higher removal rate was obtained under the higher concentration of oxygen, MLSS and OTC condition.