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The output of wind power and photovoltaic has the characteristics of randomness, volatility, and intermittency. Direct grid connection will lead to a lower power generation income of the power station, a greater volatility of grid connection of electric energy, and more wind and photovoltaic power discards, resulting in lower carbon emission reductions. The addition of pumped storage power plants effectively reduces the above impacts. Therefore, this paper studies the application scenario of wind photovoltaic and pumped storage combined power generation, establishes a multi-objective optimization model that comprehensively considers the three objectives of maximizing the economic benefits of the combined system, minimizing the system power fluctuation, and maximizing carbon emission reduction, and converts the multi-objective problem into a single objective problem for solution by normalization. In this paper, the gray wolf algorithm, which can realize the adaptive adjustment of local search and global search, is used to simulate and optimize the grid connected power of wind power, photovoltaic, and pumped storage. The optimization results show that the established model can effectively improve the economic benefits of the system and greatly reduce the fluctuation of power grid connection. In addition, the efficient use of new energy also greatly improves the carbon emission reduction capacity of the joint system, which proves that the model has high feasibility.

A new method is proposed to solve the problem of finite-time synchronization transmission of signal in the current modulated semiconductor laser. Firstly, the characteristics of current modulated semiconductor laser are analyzed theoretically. Then, the unique sliding mode surface and sliding mode controller are designed to achieve the finite-time synchronization transmission of the target signal by using sliding mode control method. The results show that the technology can not only ensure that the current modulated semiconductor laser can complete the synchronization transmission of the target signal in a finite time, but also control the convergence speed of the sliding surface by simply adjusting the parameter in the sliding surface. In the meantime, the technology has no restrictions on the target signal.

Objective: To investigate the relationship between local immune status of vagina and the occurrence of disease in patients with cervicitis., Methods: ELISA were used to detect the level of interleukin (IL)-8 and tumor necrosis factor (TNF)alpha in vaginal douche of patients with cervicitis due to ureaplasma urealyticum, mycoplasma hominis, chlamydia trachomatis, neisseria gonorrhoeae and cervical erosion., Results: Compared with the control group, the level of IL-8 in vaginal douche of patients with mycoplasma hominis cervicitis, chlamydia trachomatis cervicitis and neisseria gonorrhoeae cervicitis was significantly higher and there was significant difference ng/L: 371 +/- 34, 369 +/- 31, 339 +/- 36, vs 341 +/- 32, 338 +/- 33, 316 +/- 24, (all P < 0.01). Comparing the level of IL-8 in vaginal douche of patients with ureaplasma urealyticum cervicitis and cervical erosion with that of control group, there was no statistical difference (all P > 0.05). The level of TNF-alpha in vaginal douche of each group was remarkably higher than that of control group except for patients with cervical erosion. And statistically significant difference was found between them (all P < 0.01)., Conclusion: With regards to the pathogenesis of cervicitis, local immune mechanism of vagina plays an important role in the occurrence of cervicitis. The role of IL-8 in pathogenesis of mycoplasma hominis cervicitis, chlamydia trachomatis cervicitis and neisseria gonorrhoeae cervicitis is likely to be more important.