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The surface roughness rolling-transfer and change law of high strength steel strips and the surface roughness change law of working rolls are studied through a batch of field experiments and analyzed by a statistical method to find out a control method of producing high strength steel strips with especially required roughness. Experimental results show that the surface morphology of high strength steel strips is determined by the end of the continuous rolling mill. A surface roughness prediction model and a rolling-transfer rate model of high strength steel strips and a surface roughness prediction model of working rolls are established in this paper. The rolling-transfer behaviors of high strength steel strips are compared with those of normal strength steel strips. These models can be used to predict the surface roughness of high strength steel strips during industrial production,help to order the cold rolling sequence and make a rolling plan more efficiently,and determine the roll replacing time.

5-Hydroxytryptamine (5-HT) is an inhibitory neurotransmitter widely distributed in mammalian tissues, exerting its effects through binding to various receptors. It plays a crucial role in the proliferation of granulosa cells (GCs) and the development of follicles in female animals, however, its effect on porcine follicle development is not clear. The aim of this study is to investigate the expression of 5-HT and its receptors in various parts of the pig ovary, as well as the effect of 5-HT on porcine follicular development by using ELISA, quantitative real-time PCR (qPCR) and EdU assays. Firstly, we examined the levels of 5-HT and its receptors in porcine ovaries, follicles, and GCs. The findings revealed that the expression of different 5-HT receptors varied among follicles of different sizes. To investigate the relationship between 5-HT and its receptors, we exposed the GCs to 5-HT and found a decrease in 5-HT receptor expression compared to the control group. Subsequently, the treatment of GCs with 0.5 μM, 5 μM, and 50 μM 5-HT showed an increase in the expression of cell cycle-related genes, and EdU results indicated cell proliferation after the 0.5 μM 5-HT treatment. Additionally, the expression of genes involved in E2 synthesis was examined after the treatment of granulosa cells with 0.5 μM 5-HT. The results showed that CYP19A1 and HSP17β1 expression was decreased. These results suggest that 5-HT might affect the development of porcine follicle by promoting the proliferation of GCs and inhibiting the synthesis of estrogen. This provides a new finding for exploring the effect of 5-HT on follicular development, and lays a foundation for further research on the mechanism of 5-HT in follicles. [ABSTRACT FROM AUTHOR]

Comprehensive Summary: Singlet fission (SF) has potential applications in high‐efficiency photo‐energy harvesting applications, but its practical application is hindered by the limited number of materials. In this work, we explored the bay aromatic substitution strategy for the design of new perylenediimide (PDI) based SF materials. A series of PDI derivatives with biphenyl or naphthalene units substituted at the bay positions were designed and synthesized to investigate the effects of aromatic substitutes on their photodynamic behaviours. The bay substitutions do not shift the energy level of the PDI core significantly but give rise to different intermolecular coupling strengths in the thin films and affect the intermolecular SF efficiency. Femtosecond transient absorption (fsTA) spectroscopy reveals that appropriate spacing configuration from the bay aromatic substitution groups enhances the SF yields by promoting the interaction of neighbouring PDI cores. Triplet exciton yields of up to 183% have been obtained from these new PDI derivatives, making them potential candidates in future SF‐based optoelectronics. [ABSTRACT FROM AUTHOR]

Solid additives have drawn great attention due to their numerous appealing benefits in enhancing the power conversion efficiencies (PCEs) of organic solar cells (OSCs). To date, various strategies have been reported for the selection or design of non‐volatile solid additives. However, the lack of a general design/evaluation principles for developing non‐volatile solid additives often results in individual solid additives offering only one or two efficiency‐boosting attributes. In this work, we propose an integrated omnidirectional strategy for designing non‐volatile solid additives. By validating the method on the 4,5,9,10‐pyrene diimide (PyDI) system, a novel non‐volatile solid additive named PyMC5 was designed. PyMC5 is capable of enhancing device performance by establishing synergistic dual charge transfer channels, forming appropriate interactions with active layer materials, reducing non‐radiative voltage loss and optimizing film morphology. Notably, the binary device (PM6 : L8‐BO) treated by PyMC5 achieved a PCE over 19.5 %, ranking among the highest reported to date. In addition, the integration of PyMC5 mitigated the degradation process of the devices under photo‐ and thermal‐stress conditions. This work demonstrates an efficient integrated omnidirectional approach for designing non‐volatile solid additives, offering a promising avenue for further advancements in OSC development. [ABSTRACT FROM AUTHOR]

In order to study the effectiveness of pipeline cathodic protection system in preventing AC interference corrosion under AC interference， the testing device for stray current interference of buried steel pipelines was established， and the influence of cathodic protection current on the AC corrosion behavior of test coupons was studied. With the change of the applied DC voltage，the changes of parameters such as the cathodic protection power-off potential， the AC current density and the DC current density of the coupons over time were monitored by data recorders. Results showed that the influence of the increase and decrease of the applied DC current on the test coupons was irreversible； With the increase of applied DC current， the AC current density decreased and the diffusion resistance increased； When the DC current increased， the cathodic protection potential would no longer shift negatively after polarization to -1.10 V (vs CSE)， and the polarization process was changed from electrochemical control to concentration polarization control. The ratio of AC to DC current density revealed that，the AC interference could not be reduced simply by increasing the cathodic protection current， and it was necessary to adopt the AC drain method to reduce the impact of AC interference.

Comprehensive Summary: Singlet fission (SF) has potential applications in high‐efficiency photo‐energy harvesting applications, but its practical application is hindered by the limited number of materials. In this work, we explored the bay aromatic substitution strategy for the design of new perylenediimide (PDI) based SF materials. A series of PDI derivatives with biphenyl or naphthalene units substituted at the bay positions were designed and synthesized to investigate the effects of aromatic substitutes on their photodynamic behaviours. The bay substitutions do not shift the energy level of the PDI core significantly but give rise to different intermolecular coupling strengths in the thin films and affect the intermolecular SF efficiency. Femtosecond transient absorption (fsTA) spectroscopy reveals that appropriate spacing configuration from the bay aromatic substitution groups enhances the SF yields by promoting the interaction of neighbouring PDI cores. Triplet exciton yields of up to 183% have been obtained from these new PDI derivatives, making them potential candidates in future SF‐based optoelectronics. [ABSTRACT FROM AUTHOR]

Death after carotid sinus trauma is usually attributed to death from inhibition, a type of sudden death. Currently, the number of incidents is scarce, and related studies are few. Therefore, how to determine the involvement of carotid sinus and determine the role of diseases in the cause of death has always been a difficult point in forensic investigation. This article sorts out the research literature on carotid sinus related death at home and abroad in recent years, systematically reviews the anatomic structure of the carotid sinus nerve, the clinical epidemiology of carotid sinus syndrome, and the research on the death mechanism of carotid sinus injury at home and abroad in recent years, in order to provide references for forensic pathology research and prosecution.