摘要：Inductive coupling transmission system is an important measurement device for acquiring and transmitting marine environmental ***,low transmission rate cannot meet the current demand for large data transmission in marine environment detection at *** order to improve the transmission performance of the system in practical communication system,optimizing the design by directly changing the circuit parameters is time-consuming and ***,a set of inductive coupling transmission channel analysis system is designed based on virtual instrument to improve the transmission rate and reliability of inductive coupling transmission *** bit error rate of channel system at different frequency and noise levels are tested by using three kinds of digital modulation mode including amplitude shift keying(ASK),frequency shift keying(FSK)and differential phase shift keying(DPSK),taking square wave and sine wave as a ***,the sine wave is selected to be carrier signal and DPSK is chosen to be modulation *** reliable transmission of signal with the error rate less than0.005and the transmission rate of9600bps,at the noise level of-10dB,is realized and verified by the debugging circuit experiments with multi-nodes in the *** study provides an important experimental evidence for improving signal transmission reliability of inductive coupling transmission system.

摘要：长寿命溶解氧海水电池是深远海观测能源网络的重要组成单元,但海水贫氧复杂环境对设计高性能氧还原催化剂提出了重要挑战.本文以酞菁铁为模型催化剂,通过理论计算与实验验证,提出了活性位点电子轴向拉伸可大幅提升催化剂在极端贫氧环境中的氧还原活性和稳定性.该研究为构建高性能海水电池提供了材料学解决方案,同时为极端环境下催化剂的变革性设计提供了新的思路.

摘要：本文特别针对24V电池输入条件下的低电压,大电流特性,设计了一种新颖的PWM软开关DC-DC前向式功率变换器模型。在局部运行区域,利用了ZCS PWM DC-DC前向式功率变换器的附加控制模式来实现软开关。这种新型功率变换器在低负载条件下可支持PWM-PDM双模控制一疗式,研究结果征实,在ZCS 和有功电压钳位开关条件下,基于PWM-PDM双模控制的软开关前向式功率变换器可在较大的负载范围内改善运行效率。