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The garbage leachate generated by the waste transfer station has the characteristics of scattered water sources, relatively small water quantity, large fluctuations in water quality and quantity, and high concentrations of organic matter, ammonia nitrogen, suspended solids, and other pollutants. These characteristics make it prone to environmental hazards. This paper analyzes the characteristics and hazards of leachate from waste transfer stations and introduces the current research status of physico-chemical, biological, and combined treatment of leachate from waste transfer stations. Meanwhile, this paper introduces engineering practices for leachate treatment in waste transfer stations, offering a valuable reference for research and engineering practices in this field. Finally, this review discusses pretreatment, economic, low-carbon, and high-efficiency treatment methods and facilities, the recovery of valuable elements, energy recycling technologies, and the demand outlook for high-standard deep treatment processes.

Purpose: To explore the clinical effect of intense pulsed light on freckles. Methods: A total of 102 patients with facial freckles treated in our hospital between November 2014 and May 2017 were taken as the subjects of this study. The patients, after being confirmed with facial freckles, were treated with M22 Photorejuvenation, and evaluated at the end of the treatment in terms of therapeutic effect, adverse reactions, changes of indicators before and after treatment as well as relapse. Results: In terms of treatment effect, there were 46 patients (45.10%) above expectation, 50 patients (49.02%) up to expectation and 6 patients (5.88%) below the standard, with a total effective rate of 94.12%. In terms of adverse reactions, there were 8 patients with temporary facial flushing, 4 patients with mild edema and 3 patients with burning sensation, with a probability of 14.71%. In terms of indicator changes before and after treatment, the skin elasticity and skin moisture of each part of the patient’s face were improved, with the skin elasticity of the patient’s forehead and lower jaw up by 8.9% and 8%, respectively, and the skin moisture of the patient’s left cheek up by 25.7%, which was very obvious. In addition, the proportion of melanin and skin oil of the patients were significantly reduced, with the melanin proportion of the left cheek down by 30.1% and the overall skin oil proportion of the face down by about 1%. At the end of the treatment, 5 patients had freckle recurrence, with a recurrence rate of 4.90%, which was statistically significant (P

The seeds of Elymus tangutorum infected with Epichloë bromicola were treated by soaked, wet-dry cycle, mechanical damage, and fungicide. The germination time and germination rate the seeds were measured. The results showed that each treatment had a certain effect on the germination of E. tangutorum infected with Ep. bromicola seeds. The total germination rate: wet-dry cycle (soaked for 6h, dried for 6h)> mechanical damage> fungicide (cyclosporin T) immersion (6h)> aseptic water soaked (6h)> CK can be seen from the experimental data. And wet-dry cycle, aseptic water soaked, and mechanical damage have significant effect on increasing the rate of seeds. Among these methods, the germination rate of the seeds treated by wet-dry cycle method was the highest. The treatment has both chemical and physiological functions, thus improving the germination rate and propagation coefficient of seeds.

Low-frequency acoustic scatterings from a finite cylindrical shell are numerically analyzed by FEM. The simulation results show that the acoustic-scattering field in waveguide has lots of frequency-related sidelobes, while no sidelobes exist in free space at low frequencies. The simulation also indicates that the module value in waveguide can be almost 20 dB larger than that in free space at low frequency, which is caused by the ocean boundaries. We also demonstrate that when the incident wave direction is normal to the target at low frequency, the target strength will be maximum and the distribution of the acoustic-scattering field is axisymmetric about the incident waving direction. Meanwhile, the acoustic-scattering field is also related to the impedance of the seabed, and the change of the impedance makes just a little contribution to the scattering field. Finally, the influence of different target locations is analyzed, including the targets near the sea surface, seabed and the middle region of the ocean waveguide, respectively. From simulation results, it is evident that the distribution of the acoustic-scattering field at low frequency has a little difference, which is smaller than 0.5 dB with various target locations, and the change is frequency and boundary-related.

To make people at different places participate in the same conference, speak and discuss freely, the interactive remote video conferencing system is designed and realized based on multi-Agent collaboration. FEC (forward error correction) and tree P2P technology are firstly used to build a live conference structure to transfer audio and video data; then the branch conference port can participate to speak and discuss through the application of becoming a interactive focus; the introduction of multi-Agent collaboration technology improve the system robustness. The experiments showed that, under normal network conditions, the system can support 350 branch conference node simultaneously to make live broadcasting. The audio and video quality is smooth. It can carry out large-scale remote video conference.

The shock absorber is considered as an important component of the suspension system. In its production process, the liquid filling for the shock absorber is a very important part. This paper introduced one kind of shock absorber stem–filling system, which achieved liquid dry-filling in the shock absorber for the car engine. The results showed that this system is stable and reliable.