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AIM: To explore the correlation between neonatal retinal hemorrhage(RH)and changes in umbilical artery blood gas analysis.METHODS: A total of 312 full-term neonates born in our obstetrics department from January 2019 to December 2021 were selected as the study subjects. According to the RetCam III fundus examination results, 245 neonates who did not experience RH were included in the control group, while 67 cases with RH were found to be included in the RH group. In addition, neonates were grouped into I degree group(n=20), II degree group(n=29), and III degree group(n=18)based on the degree of RH. General clinical data and umbilical artery blood gas analysis indicators between the RH group and the control group were compared; the levels of umbilical artery blood gas analysis indicators in neonates with different degrees of RH, the relationship between pH and RH degree, and the influencing factors of neonatal RH were analyzed.RESULTS: There was no obvious difference in maternal age, average gestational week, fetal gender, parity, gestational diabetes, fetal birth weight, and amniotic fluid between the RH group and the control group(all P>0.05), while there were obvious differences in delivery methods, gestational hypertension, forceps assisted delivery, neonatal asphyxia, and umbilical cord around the neck(all P

为了降低棉籽粕中游离棉酚含量，通过实验室及生产线跟踪研究了溶剂萃取法脱酚工艺参数、脱酚方法（膨化预处理法、溶剂萃取法）、原料产地和储存时间对棉籽粕脱酚效果的影响。结果表明：工业生产中，在棉坯粉末度25%～28%、棉坯水分含量3.5%～4.5%、甲醇体积分数85%～90%、脱酚温度55 ℃左右、逆流萃取脱酚料液比（物料质量与新鲜甲醇溶剂体积比） 1∶ （0.5~0.6）条件下，棉籽粕脱酚效果较好；溶剂萃取法脱酚效果优于膨化预处理法；对于棉籽原料产地，棉酚的脱除容易程度为北疆>南疆>河北，与棉籽的粗脂肪酸值大小正好相反；棉籽储存时间越长，棉酚越难以脱除。因此，选择新鲜、粗脂肪酸值低的棉籽原料，严格控制溶剂萃取脱酚工艺参数，可以得到更低游离棉酚含量的棉籽粕。In order to reduce the content of free gossypol in cottonseed meal, the effects of solvent extraction degossypolization parameters, degossypolization methods (extruding pretreatment method, solvent extraction method), raw material origin and storage time on the degossypolization effect of cottonseed meal were studied in laboratory and workshop. The results showed that in industrial production, the degossypolization effect of cottonseed meal was better under the conditions of 25%-28% powder and 3.5%-4.5% moisture content of cottonseed flake, 85%-90% volume fraction of methanol, 55 ℃ degossypolization temperature, and ratio of material mass to solvent volume of fresh methanol 1∶ (0.5-0.6). The degossypolization effect of solvent extraction method was better than that of extruding pretreatment method. For the origin of cottonseed, the removal degree of gossypol was decreased in the order of North Xinjiang > South Xinjiang > Hebei, which was opposite to the crude fat acid value of cottonseed. The longer the storage time of cottonseed, the more difficult it was to remove gossypol. Therefore, cottonseed meal with lower free gossypol content can be obtained by selecting fresh cottonseed raw materials with low crude fat acid value and strictly controlling the process parameters of solvent extraction degossypolization.

At present, the effective management of the rural environment has drawn the attention of the entire global community. Heilongjiang Province majors in agriculture and animal husbandry resources. Compared with urban environmental pollution, the pollution caused by agriculture and animal husbandry has a strong impact on the use of agricultural elements and environmental constraints. At the same time, it has the characteristics of high governance cost, high governance difficulty, and difficulty in being monitored. In this study, the environmental Kuznets curve is used to verify the relationship between rural environmental pollution and economic growth in Heilongjiang Province, and a linear regression model is designed to verify time series data and indicators. The results show that the phenomenon of rural water pollution has become common in Heilongjiang Province, the discharge of rural environmental pollutants has exceeded the safe discharge limit value, and the pollution degree of the rural environment in Heilongjiang Province has exceeded the safety warning value at least, and it is very necessary for its treatment. This study enriches the research methods and content of the performance evaluation of rural environmental governance in my country helps to objectively evaluate the governance issues of the rural environment in Heilongjiang Province, and can be a functional area of grain production that is highly dependent on resources and environmental constraints of the same kind in my country. Rural environmental governance provides a universal reference.

Based on the concept of artificial intelligence (AI) and the summary of existing research methods, this essay reviews the theoretical and empirical research into AI’s impact on industrial distribution, jobs, wages and other aspects in the field of employment. The essay finds that AI technology accelerates job polarization in the labor market and causes wage inequality during this process while taking over some occupations and promoting the flow of labor among different industries. In the long run, the substitution and creation effects will coexist for the long term, and the creation effects will exercise increasingly obvious influence; wage inequality can be compensated by long-term social policies; job polarization will not last for long; and workers’ flow between industries is essentially a result of matching labor skills with task needs after technological changes. More scholars believe that the impact of artificial intelligence on employment in the future is controllable, and the key is in the broad and effective human-computer cooperation facilitated by the improvement of labor’s skill levels through education and training

This paper summarizes the current situation of the university education informatization, cloud computing and the application of big data in education, and preliminarily constructs the big data platform model of university informatization intelligent teaching service of Yunnan University Teacher Education Alliance Based on cloud computing Part of the content of the model is described to provide reference for regional alliance education related research.

We study some limit properties of the harmonic mean of random transition probability for a second-order nonhomogeneous Markov chain and a nonhomogeneous Markov chain indexed by a tree. As corollary, we obtain the property of the harmonic mean of random transition probability for a nonhomogeneous Markov chain.