商丘职业技术学院（Shangqiu Polytecnic）是经河南省人民政府批准、教育部备案的一所公办全日制高等职业院校，全国示范性高等职业院校。 1977年商丘地区农业学校创建；1994年商丘市职业中专更名商丘市财经学校；2001年商丘广播电视大学、商丘财经学校、商丘市农业学校合并升格为商丘职业技术学院；2003年商丘财税学校、商丘市工业学校、商丘商业学校、商丘市体育运动学校、商丘文化艺术学校并入商丘职业技术学院；2007年10月学院被教育部、财政部批准为“国家示范性高等职业院校”立项建设单位。 2017年，学院入选河南省国家级优质高等职业院校建设项目。 2019年1月，由我院张慎举教授作为主要完成人、我院作为第二完成单位的科研成果《高产优质小麦新品种郑麦7698的选育与应用》（编号：J-201-2-05）获得了2018年度国家科学技术进步二等奖。 根据2015年8月学校官网显示，该校占地1743亩，建筑面积57万平方米，固定资产总值6.67亿元；图书馆藏书143万册，中外文纸质、电子期刊8000种；有16个教学系（院、部）和校区，开设有61个专业（含专业方向），有专任教师810人，教授58人，副高级以上职称教师381人，博士、硕士研究生（含在读）355人，“双师素质”教师506人；有全日制在校生总人数18000余人。
[Objective]To propose an early detection method for contaminated food based on the extreme learning machine and crystal structure algorithm.[Methods]The crystal structure algorithm is used to optimize feature selection,combined with the extreme learning machine for fast and efficient classification and detection,aiming to improve the accuracy and efficiency of early detection of contaminated food.[Results]Compared to traditional methods,the proposed approach shows significant improvements in accuracy(94.5%)and F1-score(93.2%).It also outperforms other state-of-the-art methods in recall rate and processing speed.Compared to the latest deep learning methods,the training time is reduced by about 30%,and the detection speed is improved by 25%.[Conclusion]The early detection method for contaminated food based on the extreme learning machine and crystal structure algorithm demonstrates clear advantages in improving detection accuracy,speeding up detection,and optimizing computational efficiency.It holds promising practical application prospects,especially for rapid and large-scale food safety detection.
Xylooligosaccharide(XOS)is a functional oligosaccharide formed by glycosidic bonds.It has excellent heat resistance,and its viscosity decreases rapidly with the increase in temperature.Its water activity is close to that of glucose.It can effectively improve the moisture absorption and reabsorption problems of feed,lower the freezing point,and enhance the anti-freezing performance of feed.As a prebiotic,XOS can significantly regulate the intestinal flora,activate the body's immune system,increase immunity,reduce inflammation,improve the absorption of nutrients such as protein and minerals,and increase feed utilization.In addition,XOS can enhance the animal's disease resistance,reduce diarrhea rates,improve the growth performance of animals,lower the emission of harmful gases such as ammonia,and optimize the animal production environment.This article systematically reviews the physicochemical properties,functional mechanism,and research status of XOS in the field of animal breeding,providing a reference for the wide application of XOS in livestock and poultry production.
As a traditional medicinal and food homologous plant,rose not only has ornamental value,but also contains a variety of bioactive components that are beneficial to human body.Among them,rose polysaccharide is one of its main bioactive ingredients,with a variety of beneficial biological activities,including antioxidant,anti-inflammatory,anti-tumor,anti-diabetes,liver protection and moisturizing.This review summarized the extraction,purification,structural characteristics,biological activities and relationship between structure and activity of rose polysaccharides,and the potential applications of rose polysaccharides were also analyzed and discussed.
The rotational speed of gear system directly affects the dynamic characteristics of gear system,but this important factor was often ignored by many scholars in the calculation of mesh stiffness.In order to study the influence of rotational speed on mesh stiffness,an algorithm of calculating the dynamic mesh stiffness which related to rotational speed was proposed based on finite element framework by using the average acceleration method.Meanwhile,the dynamic mesh stiffness under different rotational speeds was simulated and analyzed.Finally,the relevant dynamic characteristics of gear system which affected by dynamic mesh stiffness were further explored.The research results show that the dynamic mesh stiffness varies with rotational speed of gear system.With the increase of rotational speed,the fluctuation range of the dynamic mesh stiffness increases relative to the static mesh stiffness.The resonance speed range of the gear system calculated by dynamic mesh stiffness is either ahead or behind the static mesh stiffness,and the super harmonic response of dynamic mesh stiffness model is more obvious at high rotational speed.The research on dynamic mesh stiffness related to rotational speed can provide reference for improving transmission performance and reducing vibration and noise of spur gear.
