A YOLOv7 incorporating the Adan optimizer based corn pests identification method.

Major pests of corn insects include corn borer, armyworm, bollworm, aphid, and corn leaf mites. Timely and accurate detection of these pests is crucial for effective pests control and scientific decision making. However, existing methods for identification based on traditional machine learning and neural networks are limited by high model training costs and low recognition accuracy. To address these problems, we proposed a YOLOv7 maize pests identification method incorporating the Adan optimizer. First, we selected three major corn pests, corn borer, armyworm and bollworm as research objects. Then, we collected and constructed a corn pests dataset by using data augmentation to address the problem of scarce corn pests data. Second, we chose the YOLOv7 network as the detection model, and we proposed to replace the original optimizer of YOLOv7 with the Adan optimizer for its high computational cost. The Adan optimizer can efficiently sense the surrounding gradient information in advance, allowing the model to escape sharp local minima. Thus, the robustness and accuracy of the model can be improved while significantly reducing the computing power. Finally, we did ablation experiments and compared the experiments with traditional methods and other common object detection networks. Theoretical analysis and experimental result show that the model incorporating with Adan optimizer only requires 1/2-2/3 of the computing power of the original network to obtain performance beyond that of the original network. The mAP@[.5:.95] (mean Average Precision) of the improved network reaches 96.69% and the precision reaches 99.95%. Meanwhile, the mAP@[.5:.95] was improved by 2.79%-11.83% compared to the original YOLOv7 and 41.98%-60.61% compared to other common object detection models. In complex natural scenes, our proposed method is not only time-efficient and has higher recognition accuracy, reaching the level of SOTA.

Influence of health literacy of rural junior middle school students on knowledge, attitudes and practices of COVID-19 protection in Jiangxi Province / 中国学校卫生

Objective@#To understand the influence of junior middle school students health literacy on knowledge, belief and behavior of COVID-19 in rural areas of Jiangxi Province, and to enhance junior middle school students ability to deal with public health emergencies.@*Methods@#Stratified cluster random sampling was used to investigate the health literacy, knowledge level and behavior of COVID-19 protection of 4 311 grade 7 to grade 8 students in rural areas of Jiangxi Province; Chi square test and Logistic regression analysis were used to analyze the correlation between junior high school students health literacy and COVID-19 protection knowledge, belief and behavior.@*Results@#The rate of health literacy of junior middle school students in rural areas was 18.21 %( n =785), the reported rate of intermediate level was high ( n =2 454, 56.92%), and the reported rate of junior high school students at a low level of health literacy was 24.87%( n =1 072). The rate of junior middle school students in rural areas with good COVID-19 protection knowledge was 63.49%, the rate of positive protection attitude was 74.25%, and the rate of good protection behavior was 85.36%; Rate of COVID-19 protection knowledge ( OR=4.85, 95%CI =3.80-6.18) and positive rate of protection attitude of high level health literacy ( OR=44.07, 95%CI =24.57-79.05), protective behavior possession rate ( OR=25.99, 95%CI = 19.67-34.35) were higher than those with low level of health literacy( P <0.01).@*Conclusion@#Health literacy is associated with COVID-19 protection knowledge, belief and behavior in rural junior high school students of Jiangxi Province, the findings provide direction for junior middle school students to improve their ability to deal with public health emergencies.

Short- and long-term outcomes of laparoscopic complete mesocolic excision for colon cancer in the elderly: A retrospective cohort study.

PURPOSE: Laparoscopic complete mesorectal excision (CME) can be used for the treatment of colon cancer. This study was designed to assess short-term and long-term outcomes of laparoscopic CME in elderly colon cancer patients. METHODS: We retrospectively reviewed colon cancer patients who underwent laparoscopic CME at a single medical center between January 2014 and January 2019. Short-term surgical outcomes and long-term survival outcomes were analyzed, including overall survival (OS) and disease-free survival (DFS). RESULTS: A total of 152 patients were included in the study, of which 54 were classified as elderly group (≥70 years) and 98 were classified as younger group (<70 years). The elderly group had more Charlson comorbidity index (CCI) scores >3. The short-term results of the two groups were similar. The overall complication and major complication rates were comparable between the two groups. The 5-year OS rates of the elderly and younger groups were 67% and 71%, respectively (p=0.846). The 5-year DFS rates in the elderly and younger groups were 59% and 62%, respectively (p=0.995). CONCLUSION: Compared with younger patients, laparoscopic CME in elderly colon cancer patients can achieve similar short-term and long-term outcomes. For elderly colon cancer patients, age is not a contraindication to laparoscopic CME.

Short- And medium-term outcomes of reduced-port laparoscopic surgery in elderly patients with upper rectal cancer: A retrospective cohort study.

BACKGROUND: To investigate the short- and medium-term outcomes of using a reduced-port laparoscopic surgery (RPLS), compared to multi-port laparoscopic surgery (MPLS), for the treatment of upper rectal cancer (URC) among elderly patients. METHODS: We conducted a retrospective analysis of the clinical and follow-up data of 181 elderly patients with URC, who underwent radical laparoscopic surgery at our hospital, between January 2015 and January 2019. Among these 181 cases, 62 underwent RPLS and 119 MPLS. RESULTS: Compared to MPLS, RPLS decreased the length of surgical incision, lower pain on postoperative days 1 and 2, decreased the time to first flatus after surgery, as well as the time to mobilization after surgery. There was no difference between the short-term outcomes between the two laparoscopic approaches, and no difference in the 3-year disease-free and overall survival rate. CONCLUSION: Compared to MPLS, RPLS provides several advantages for the treatment of URC among elderly individuals, including a shorter length of surgical incision, reduced postoperative pain, shorter time to first flatus after surgery, earlier mobilization, and better cosmetic outcomes. These advantages are achieved with no difference in the length of surgery, nor in the 3-year disease-free and overall survival rate, compared to MPLS.

The epithelial cadherin -160C/A polymorphism is associated with decreased risk of colorectal cancer: a case-control study.

The epithelial cadherin (CDH1) is an important determinant of tumor progression. Previous studies have indicated that the CDH1 -160C/A polymorphism was associated with the risk of colorectal cancer (CRC). However, they yielded conflicting results. Thus, we conducted this case-control study to evaluate the association between the CDH1 -160C/A polymorphism and susceptibility to CRC in a Chinese population. We recruited 351 cases and 411 controls in this case-control study. The genotype of the CDH1 -160C/A polymorphism was performed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS). This study found that the CDH1 -160C/A polymorphism was associated with decreased risk of CRC in this Chinese Han population. Subgroup analyses showed that the CDH1 -160C/A polymorphism decreased the risk of CRC among the males and non-drinkers. In addition, a significantly decreased risk was observed in CRC patients with tumor size ≤ 5 cm, and AA genotype showed a protective role in the CRC patients with no lymph node metastasis. In conclusion, this study shows that CDH1 -160C/A polymorphism is associated with decreased risk of CRC in a Chinese Han population.