Search

Objective To investigate the clinical characteristics and antibody distribution as well as evaluate the transfusion efficacy in unexpected antibody positive patients. Methods A total of 12 235 patients from January 1, 2022 to March 31, 2023 who hospitalized in our hospital and applied for blood transfusion were selected, and those with unexpected antibody were included. The clinical data, including gender, age, diagnosis, blood type, history of transfusion and pregnancy were collected for antibody distribution analysis. Patients who received transfusion were grouped according to the DAT results and the components of red blood cells transfused, and the Hb values of each group before and after transfusion were compared. Results Among12 235 patients, 118 were positive for antibody screening, with a prevalence of 0.96%. The antibodies from Rh system were the most common (27.43%, 48/175), followed by MNS system (8.57%, 15/175) and Lewis system (6.29%, 11/175), mainly anti-E (18.29%, 32/175), anti-M (8.00%, 14/175) and anti-Lea (5.71%, 10/175). In addition, 62 transfused patients were divided into group A with suspended red blood cell transfusion and group B with washed red blood cell transfusion for positive DAT, and group C for negative DAT. Hb values (g/L) pre- and post-transfusion were 59.19±15.67 vs 77.52±15.09 in group A, 56.35±14.08 vs 74.44±15.63 in group B, 56.00±12.06 vs 75.00±4.73 in group C, respectively. The Hb values of post-transfusion for three groups were all higher than those of pre-transfusion (P

Flexible materials with both in-plane and out-of-plane piezoelectric coefficients are needed in the development of advanced nanoelectromechanical systems. However, the challenge is to find flexible materials with the coexistence of in-plane and -out-of-plane piezoelectric responses, which hinders the progress of high-performance piezoelectric sensor development. In this paper, we propose the flexible XMAY2 (X = I; M = Ti, Zr; A = Al, Ga; Y = S, Se) monolayers, which belong to the group III-VI XMAY2 family, which showcase notable in-plane and out-of-plane piezoelectric coefficients. The in-plane (d11) and out-of-plane (d31) piezoelectric coefficients of the XMAY2 monolayers vary from 5.20 to 7.04 pm/V and from −0.23 to 0.48 pm/V, respectively. The large in-plane and out-plane piezoelectric responses coexist (d11 = 7.04 pm/V; d31 = 0.48 pm/V) in the IZrGaS2 monolayer, which is larger than other materials in the XMAY2 family, such as SMoSiN2 (d11 = 2.51; d31 = 0.28 pm/V). In addition, the mechanical and transport properties of XMAY2 demonstrate its impressive flexibility characteristics as well as its efficient electrical conductivity. Due to inversion symmetry breaking in both atomic structure and charge distribution of XMAY2 monolayers, the group III-VI XMAY2 family exhibits a potentially rich scope of applications in the field of piezoelectricity.

In order to explore the suitability of Baijiu made from different Guizhou He varieties and establish its evaluation system. The 88 Guizhou He varieties were selected to brew the Baijiu, and their quality indexes were determined and analyzed to investigate the difference of quality indexes of Baijiu made from different Guizhou He varieties. At the same time, the brewing suitability quality of different Guizhou He varieties was comprehensively evaluated by principal component analysis, a two-dimensional analysis and cluster analysis, and the quality evaluation model of which was established. The results showed that there were significant differences in quality indexes of Baijiu made from different varieties of Guizhou He (P

China has the largest industrial scale and the most abundant industry type among the world.However, due to the influence of many factors, it is necessary to discover the blocking and breakpoints of the industrial chain, identify the stuck points, find alternative channels, and comprehensively optimize the industry.Then, this article explained the construction process of the industry knowledge graph from three aspects: data base construction, core knowledge graph mining, and compatibility with traditional industry chain knowledge.Finally the application scenarios and advantages of industry knowledge graph was analyzed, and an application case was given in the integrated circuit industry.

In the construction process of mass concrete structures, the large temperature gradient due to exothermic hydration makes the mass concrete highly susceptible to cracking. This paper carried out research on temperature control methods of mass concrete for the purpose of ensuring construction quality based on the construction of Fengyi cable-stayed bridge caps. Firstly, the temperature and stress change rule in the concrete pouring process of the caps was analyzed though the finite element method (FEM). Then, targeted-oriented comprehensive temperature control schemes were formulated according to the structural characteristics and construction environment of the cap, including the optimization of the material ratio, the arrangement of crack-resistant reinforcing steel, the design of a water pipe cooling scheme and reasonable maintenance. Finally, the whole bridge cap construction process using the optimized water pipe cooling solution was monitored, and the temperature gap between inside and outside the concrete satisfied the specification requirements rigorously. In the concrete demolding session, the concrete surface was smooth and no cracks were found, which indicates the temperature control scheme is reasonable and effective. The research results have reference significance for the pouring and temperature control of mass concrete for bridge caps.

The ecological environment is more fragile in Central and Western China, and it is a vital and difficult issue to achieve both economic catch-up and environmental protection. This paper tries to release the above dilemma by combination of the late-development advantage with the choice of the direction of green technological progress. It is concerned with whether Central and Western China are more likely to choose green technological progress due to the comparative advantage of human capital under environmental regulation, and whether green technological progress brings late-development advantages to these regions. Based on theoretical analysis, this paper adopts the system generalized moment estimation method to make empirical research on China's provincial and regional panel data from 1995 to 2020. The results indicate that human capital significantly promotes the progress of green technology; environmental regulation has a U-shaped impact on green technology progress, whereas China's current environmental regulation is propitious to promoting green technology progress; the human capital in Central and Western China is vitally important in promoting the progress of green technology, and the inflection point of environmental regulation to promoting the progress of green technology is lower than that in Eastern China, so the central and western China choose the direction of green technology progress more between the two types of technologies and therefore obtain greater growth benefits from the progress of green technology. The above results show that the comparative advantage of human capital in Central and Western China promotes the direction choice of green technological progress under reasonable environmental regulations, then the green technological progress further brings the late-development advantage of economic growth in Central and Western China. This research has a certain contribution to the research of green development and late-development advantage.