Evaluation method for assessing the auxiliary service transaction mechanism in regional power markets

Accurate and seamless auxiliary services in the power market can guarantee smooth and continuous power system operation. China’s new round of power system reform has entered a critical period, and reform implementation requires comprehensive improvements in the maturity of the supporting auxiliary service market. This study reviews the development status and evolution path of the European unified power market and the US regional power market, provides experience for the development of China’s regional power market, then identifies the key influencing factors of auxiliary service trading mechanism design in regional power markets. To analyze the rationality of the auxiliary service trading evaluation index, this paper established an evaluation model for assessing regional power markets. Using combined weight optimization, the gray correlation TOPSIS method was applied to comprehensively evaluate auxiliary service trading in the regional power market. Finally, the application of the proposed evaluation method was briefly analyzed to examine four regional power markets in China and evaluate the effectiveness of current market construction in different regions and provide suggestions for future market construction.

槐耳清膏对免疫性血小板减少症患者B淋巴细胞的作用研究

目的:探究槐耳清膏对免疫性血小板减少症(immune thrombocytopenic purpura,ITP)患者B淋巴细胞及其亚群的作用。方法:分析2019年1月至2020年3月大连医科大学附属第二医院诊断的20例ITP患者的外周血,患者中位年龄53.5(16.0~87.0)岁,其中男性8例,女性12例。首先采用流式细胞术比较患者与健康对照者CD19^(+)B淋巴细胞及其亚群CD19^(+)CD27^(+)记忆B淋巴细胞、CD19^(+)CD24^(+)CD38^(+)调节B淋巴细胞比例异同;用不同浓度(2、4、6 mg·mL^(-1))槐耳清膏处理B淋巴细胞株,应用CCK-8检测槐耳清膏对B淋巴细胞增殖的影响;流式细胞仪测定槐耳清膏处理外周血72 h后B淋巴细胞亚群的变化。结果:ITP患者CD19^(+)B淋巴细胞比例明显高于正常对照;中药槐耳清膏能够抑制B淋巴细胞的增殖,抑制ITP患者记忆性B淋巴细胞及调节B淋巴细胞。结论:中药槐耳清膏能抑制ITP患者B淋巴细胞的增殖,本研究为临床的应用提供理论依据。

Annexin A2-S100A10 heterotetramer is upregulated by PML/RARα fusion protein and promotes plasminogen-dependent fibrinolysis and matrix invasion in acute promyelocytic leukemia

Aberrant expression of annexin A2-SI00A10 heterotetramer （AIIt） associated with PML/RARα fusion protein causes lethal hyperfibrinolysis in acute promyelocytic leukemia （APL）, but the mechanism is unclear. To facilitate the investigation of regulatory association between ANXA2 and promyelocytic leukemia/retinoic acid receptor α （PML/RARα） fusion protein, this work was performed to determine the transcription start site of ANXA2 promoter with rapid amplification of 5＇-cDNA ends analysis. Zinc-induced U937/PR9 cells expressed PML/RARα fusion protein, and resultant increases in ANXA2 transcripts and translational expressions of both ANXA2 and S100A10, while S100A10 transcripts remained constitutive. The transactivation of ANXA2 promoter by PML/RARα fusion protein was 3.29 ± 0.13 fold higher than that by control pSG5 vector or wild-type RARer. The overexpression of ANXA2 in U937 transfected with full-length ANXA2 cDNA was associated with increased S100A10 subunit, although S100A10 transcripts remained constitutive. The tPA-dependent initial rate of plasmin generation （IRPG） in zinc-treated U937/PR9 increased by 2.13-fold, and cell invasiveness increased by 27.6%. Antibodies against ANXA2, S100A10, or combination of both all remarkably inhibited the IRPG and invasiveness in U937/PR9 and NB4. Treatment of zinc-induced U937/PR9 or circulating APL blasts with all-trans retinoic acid （ATRA） significantly reduced cell surface ANXA2 and S100A10 and associated reductions in IRPG and invasiveness. Thus, PML/RARα fusion protein transactivated the ANXA2 promoter to upregulate ANXA2 and accumulate S100A10. Increased AIIt promoted IRPG and invasiveness, both of which were partly abolished by antibodies against ANXA2 and S100A10 or by ATRA.

Controllable photonic spin Hall effect with phase function construction

Photonic spin Hall efect(SHE)provides new opportunities for achieving spin-based photonics applications.However,flexibly manipulating the spin-dependent sltting(SDS)of photonic SHE and imposing extra phase modulation on the two spin components are always a challenge.Here,a controllable SHE mechanism based on phase function construction is reported.It is conduded that the phases with specific functional structures performing a coordinate translation are equivalent to integrating a gradient phase to the original phases.Hence,the original phase can be used for independent phase modulation,and the gradient phase originating from the co-ordinate translation is capable of manipulating the SDS.A metasurface with Pancharatnam-Berry phase that can impose conjugate phases to the two spin components of light is fabricated to verify this mechanism.By shifing the light position,the SDS is continuously manipulated in the visible region,which is successfully used for detecting the polarization llipticity.The extra phase modulation is also performed with the original phase and thus enables measuring singular beams.It is anticipated that the controllable SHE manipulation method may open new avenues in the fields of spin photonics,optical sensing,optical communications,etc.