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电磁干扰（EMI）抑制技术是保证航天器各功能单元正常运行互不干扰的重要技术。开关电源是航天器内电磁干扰的主要来源。基于对星载开关电源DC/DC和负载点电源POL电磁干扰特性的测试结果，提出了一种星载二次电源系统的电磁干扰抑制方案，采用高稳晶振+控制器+时钟管理芯片硬件与软件设计结合的方法，利用高稳晶振为电源模块提供稳定时钟，通过控制器实现时钟管理芯片的分频和时钟分配。系统以非同步方式上电，软件控制时钟管理芯片输出电源模块同步时钟，然后软件打开时钟同步的使能，实现星载开关电源（DC/DC和POL）开关频率的外同步，最后通过测量输出电压频谱的方法验证了电磁干扰抑制方案的有效性。

This paper summarized the nursing experience of a child with electrolyte disturbance after craniopharyngioma resection. Postoperative children with craniopharyngioma are prone to electrolyte disorders, and children in serious condition may have demyelination and other symptoms, directly affecting the prognosis. Medical staff should take close observation of the vital signs and consciousness, accurately record the fluid intake and output, monitor changes of body temperature, and reduce secondary damage caused by electrolyte disorders. The diet nursing should be carried out in combination with Traditional Chinese Medicine emotional nursing. (本文总结1例儿童颅咽管瘤切除术后患儿出现电解质紊乱的护理经验。颅咽管瘤切除术后患儿容易出现电解质紊乱, 严重者可出现脱髓鞘等症状, 直接影响预后效果。医护人员应严密观察患者生命体征和意识, 准确记录出入量, 监测体温变化, 减少电解质紊乱带来的继发损害; 同时给予饮食护理, 实施中医情志护理。)

Objective To observe the curative effect of massage technique and acupoint application in treating constipation after stroke. Methods Totally 78 patients with acute constipation after cerebral infarction were selected, divided into control group, acupoint application group (Acupoint application group) and massage treatment group (massage group), among which 22 patients in control group, 31 patients in application group and 25 patients in massage group. The control group patients received integrative medicine treatment and nursing. On this basis, the massage group patients received acupoint massage technique; the Acupoint application group patients were given Traditional Chinese Medicine Shenque acupoint application. The defecation situation of the three groups was observed daily for 2 weeks, and the defecation frequency of the three groups was compared with the 7th and 14th day of treatment. Barthel Index was used to evaluate the activity of daily living of patients before discharge from hospital. Results In the first week of treatment, the defecation frequency was higher in the massage group than that in the massage group and control group (P

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Copyright of Telecommunications Science is the property of Beijing Xintong Media Co., Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Geological Hazard & Control is the property of China Institute of Geological Environmental Monitoring (CIGEM) Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To explore the relationship between maternal childbearing age and congenital heart disease (CHD) in offspring. Methods Based on the CHD screening data of live births born in midwifery institutions in Liuzhou area of Guangxi Zhuang Autonomous Region from January 1, 2020 to December 31, 2022, they were divided into CHD group (n=1 117) and non-CHD group (n=107 458). The data of the two groups were matched by propensity score matching method. The childbearing age of mothers was divided into five groups: < 20 years old, 20 years old, 24 years old, 25 years old, 29 years old, 30 years old, 34 years old, and ≥ 35 years old. The multivariate logistic regression model was used to analyze the relationship between mothers and their offspring with congenital heart disease in different childbirth age groups. The restricted cubic spline curve was used to further analyze the nonlinear relationship between maternal childbearing age and offspring CHD. Results There were 1 117 cases in CHD group and 3 148 cases in control group without CHD. The corrected Logistic regression model analysis showed that the risk of atrial septal defect (ASD) in offspring of < 20 years old group and ≥ 35 years old group was significantly higher than that of mothers aged 25 to 29 years old (OR=5.38, 95%CI: 2.96-9.79; OR=1.43, 95%CI: 1.01-2.03). The risk of ventricular septal defect (VSD) was significantly increased in the offspring ≥ 35 years old (OR=1.51, 95%CI: 1.04-2.19). Restricted cubic spline and threshold analysis showed that there was a curvilinear relationship between maternal childbearing age and the risk of CHD, ASD, and VSD in offspring. The risk of CHD in offspring increased with childbirth age (OR=1.04, 95%CI: 1.02-1.06) when childbirth age was more than 25.43 years old, and VSD risk increased with childbirth age when childbirth age > 32.04 years old (OR=1.16, 95%CI: 1.09-1.24). When the delivery age was less than 23.75 years old, the risk of ASD in offspring decreased with the increase of delivery age (OR=0.69, 95%CI: 0.58-0.82). Conclusion Maternal childbearing age is an independent risk factor for CHD in offspring. Women of appropriate age should be encouraged to marry and give birth, and screening policies should be more reasonably specified for young and older women, and prenatal screening should be strengthened. [ABSTRACT FROM AUTHOR]

In order to identify the pathogen that caused rust of Bletilla striata in Guangxi Zhuang Autonomous Region and to screen resistance resources for B. striata, the rust pathogen was isolated from infected leaves of B. striata and identified using morphology and molecular methods. At the same time, the resistance of 23 B. striata from different regions was evaluated by artificial inoculation of pathogen. The results were as follows:(1)The urediopores of strain X2 isolated from diseased leaves in B. striata were golden yellow, oval,(21.43-30.95)μm ×(13.10-19.05)μm. The teleutospores were golden yellow, obovate or clavate,(17.25-30)μm ×(5.5-6.65)μm.(2)The length of ITS sequence of strain X2(OQ826009)was 689 bp, which were compared with other ITS sequences in the GenBank, and the similarity reached 95.86% compared with Coleosporium sp.(KY783686.1). But the phylogenetic tree showed that the sequence was clustered together with two sequences of Coleosporium bletiae (MN108161.1, OP363680.1). The strain X2 was identified as Coleosporium bletiae by combining morphology and molecular methods.(3)After 14 days of artificial inoculation with strain X2, the disease index of 23 Bletilla striata ranged from 0 to 70.7. And the resistance of strain X2 from 23 B. striata were divided into six different levels according to the disease index. Among them, one immune materials was identified for the disease index was 0. Four highly resistant materials were identified for the disease index was 1.7-4.7. Six disease-resistant materials were identified for the disease index was 5.6-9.4. Five medium-resistant materials were identified for the disease index was 12.7-18.3. Five susceptible materials were identified for the disease index was 32.0-49.1 and two highly susceptible materials were identified for the disease index was 62.2-70.7. In conclusion, five materials(one immune material and four highly resistant materials)of B. striata from different places(Honghe City in Yunnan Province, Gongcheng County and Baise City in Guangxi Zhuang Autonomous Region, Zunyi City in Guizhou Province and Yichang City in Hubei Province, respectively)can be promoted directly or applied as parent materials for creating excellent germplasm to resist the rust in B. striata for they express immune or highly resistance. This study provides the basis for further research on pathogenesis and control of rust in B. striata. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Network & Information Security is the property of Beijing Xintong Media Co., Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Objective To analyze the treatment outcomes and influencing factors among pulmonary tuberculosis patients in Guizhou Province from 2017 to 2022, and to improve a basis for enhancing tuberculosis prevention and control strategies. Methods Individual cases of pulmonary tuberculosis patients in Guizhou Province from 2017 to 2022 were obtained from The Tuberculosis Information Management System, The distribution characteristics of treatment success were described using percentages (%), and the Chi - square test and binary logistic regression model were utilized to analyze the factors influencing treatment outcomes. Results During the period of 2017 to 2022, the annual average registration rate of pulmonary tuberculosis patients in Guizhou Province was 97. 27/100 000 population, exhibiting a consistent downward trend (trendy2 = 2 230. 684, P < 0. 001). Meanwhile, the treatment success rate among the patients during the same time period was 92. 89%, demonstrating a steady increase (trendy2 =51. 800, P <0. 001). Analysis results of influencing factors showed that compared with female, age group < 20 years old, cadres and staff, physical examination, negative etiological results, initial treatment, no comorbidities, no other tuberculosis, and negative HIV test results, male (OR 二 0.736, 95% CI：0, 709 - 0. 765), M60 years old age group (OR = 0. 360, 95% C/;0. 323 - 0. 402), farmers (OR = 0. 591, 95% C/：0. 468 一 0. 747), medical treatment due to illness (OR = 0. 716, 95% CI: 0. 599 一 0. 855), retreatment (OR = 0. 570, 95% CI540 一 0. 602), complications (OR 二 0. 789, 95% CI: 0. 752 - 0. 827), other tuberculosis (OR =0, 685, 95% CI: 0. 542 - 0. 867) and positive HIV test results (OR = 0. 387, 95% C/：0. 342 -0.437) were risk factors for successful treatment (P <0. 05). Conclusion Overall, the treatment outcomes of pulmonary tuberculosis patients in Guizhou Province are highly positive. However, it is essential to recognize that there are disparities in the distribution of treatment outcomes across various population groups. Hence, it is recommended to prioritize the treatment concerns of specific demographics, including male patients, the elderly population, individuals residing in Bijie city, patients with positive microbiological results, HIV = positive patients, individuals requiring retreatment, and those with comorbidities or concurrent tuberculosis. By focusing on these groups, targeted interventions and tailored approaches can be implemented to ensure that all individuals receive optimal treatment and care. [ABSTRACT FROM AUTHOR]

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In order to identify the pathogens that caused tuber rot in Bletilla striata and study the inhibiting effects of herbal extracts on pathogens, the pathogens that caused tuber rot of B. striata were isolated using usual tissue isolation the strains were identified by morphological and molecular biological techniques, and inhibiting effects of seven traditional Chinese medicine extracts on pathogen were observed. The results were as follows: (1) A total of fourteen fungi and four bacteria were isolated from diseased leaves, leaf sheaths and tubers. But only strain GF-1 caused disease, whose symptoms consistent with those in the field. The incidences of GF-I disease reinoculated in the field and laboratory were both 100%. (2) GF-1 was identified as a member of Epicoccum, and its colonial morphology was a circular form, with white mycelium, prostrate on the medium, aerial, diaphragms and branches. There were conidia and chlamydospores. (3) At last, the sequence of internal transcribed spacer (ITS) region of GF-1 were analyzed, the length was 522 bp. The sequence was compared with other species in the GenBank and reached 99.62% similarity to Epicoccum sorghinum (MN493119.1) isolated form Sorghum, which was closer than others, including Epicoccum sorghinum (MF948994.1) isolated form leaves of Bletilla striata. (4) GF-1 could be fully inhibited when the medium contained 0.1-0.2 g mL-1 extracts that extracted from seven traditional Chinese medicines, respectively. It also could be fully inhibited by 0.05 g ml. of Cinnamomum cassia or Syringa oblate. In summary, the pathogen that caused tuber rot in Bletilla striata was identified as Epicoccum sorghinum. And GF-1 could be fully inhibited cultivated on the medium which contained 0.1-0.2g mL-1 herbal extracts, e.g.: Cinnamomum cassia, Syringa oblate, Cyclocarya paliurus, Bletilla striata, Houpoea officinalis, Illicium verum or Cnidium monnieri. The results provide theoretical references for the control of tuber rot of Bletilla striata. [ABSTRACT FROM AUTHOR]

Objective To provide scientific basis for formulating strategies to improve the health management of medical personnel, we analyze the resilience level, coping styles, and influencing factors of 2 100 medical personnel under sudden public health emergencies. Methods Using the convenience sampling method, 22 medical institutions were selected from Pudong New Area, Shanghai, and a self - designed electronic survey questionnaire was distributed based on the professional characteristics of medical personnel, the resilience scale of medical personnel, and the coping style scale. Results The total score of medical staffsJ resilience was 71. 246 ± 11. 442. The total score of medical staffs' coping style was 58. 614 ± 11. 493. The results of multiple linear regression analysis showed that the main factors affecting the resilience level of medical staff were hospital type (social health service center £ = 1. 966, P = 0. 049), employment form (contract system £ = 4. 031, P < 0. 001), professional title (intermediate professional title t -1. 749, P = 0. 006), marital status (married £ = 3. 471, P = 0. 001), monthly income (5 000 一 10 000 t - 2153, P = 0. 031, > 10 000 £ = 2. 475, P = 0. 013), received psychological training(£ = 6.295, 0.001). The main factors affecting the coping style level of medical personnel were hospital type (social health service center t -2, 612, P = 0. 009), time of medical activity (11 - 20 years social health service center £ = 2. 484, P = 0. 013, > 20 years £ = 2. 594, P = 0. 010), employment form (contract system t - 3, 716, P < 0. 001), professional title (intermediate professional title t - 2.268, P = 0.023), psychological training received(£ = 6.338, P < 0.001) and occupational type (management t - 2.218, P = 0.027). Conclusion The level of resilience and coping style of medical personnel need to be improved. Meanwhile, hospital type, employment form, professional title, marital status and psychological training are the influencing factors of resilience and coping style of medical personnel. [ABSTRACT FROM AUTHOR]

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Objective To investigate the risk factors associated with pathological escalation to cervical intraepithelial neoplasia grade 2 (CIN2) or above (CIN2+) in patients with CIN2 confirmed by colposcopic biopsy, aiming to provide evidence for the stratified management of CIN2 patients. Methods Clinical data of 210 patients who underwent LEEP surgery after pathological diagnosis of cervical CIN2 by colposcopic biopsy were retrospectively analyzed. Pathological diagnosis of patients before and after LEEP surgery was observed. The relationship between pathological escalation after LEEP, and age, results of primary liquid-based thin-layer cytology (TCT), typing of high-risk human papillomavirus (HPV), the number of affected quadrants of lesions under colposcopy, the proportion of visible lesion area to cervical surface area, the longest linear length of the lesion, the type of transformation zone (TZ), whether the lesion was involved with glands and the characteristics of colposcopic images was assessed by univariate and multivariate Logistic regression analyses. Results Among 210 cases of cervical CIN2 diagnosed by colposcopic biopsy, 37 cases (17.6%) were pathologically diagnosed with CIN2+ after LEEP, and 1 case was diagnosed with cervical squamous cell carcinoma stage IB1. Univariate analysis showed that pathological escalation after LEEP was associated with the age of patients, the number of affected quadrants of lesions under colposcopy, the proportion of visible lesion area to cervical surface area, the longest linear length of visible lesions, the type of transformation zone, and the characteristics of colposcoic images (all P < 0.05). Multivariate analysis showed that the number (>1) of affected quadrants of lesions under colposcopy, the proportion (≥ 1/3) of visible lesion area to cervical surface area, TZ3 type and the characteristics (≥ 2) of colposcopic images were the high-risk factors for pathological escalation after LEEP (all P < 0.05). For patients aged 26-50 years, the proportion (≥1/3) of lesion area to cervical surface area, TZ3 type and the characteristics (≥2) of colposcopic images were the high-risk factors for pathological escalation after LEEP (all P < 0.05) . Conclusions Colposcopic biopsy may miss the diagnosis of CIN2+ in patients diagnosed with CIN2. The risk of missing the diagnosis of CIN2+ is increased with the increase of the proportion of visible lesion area to cervical surface area (>1/3), the invisibility of the squamous-column junction under colposcopy, and the proportion of grade 2 signs in colposcopic images (≥ 2). For patients with CIN2 who are willing to have children, if they have the above high-risk factors, it is recommended to carefully deliver follow-up observation. [ABSTRACT FROM AUTHOR]

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Aim To screen the early and advanced atherosclerosis differential genes associated with cuproptosis by bioinformatic methods, and analyze their mechanisms of action, and predict potential biomarkers. Methods The information related to early and advanced atherosclerosis (GSE28829 and GSE43292 data sets) was downloaded from GEO database and standardized. 19 cuproptosis genes were obtained from the literature. Difference analysis, enrichment analysis, consensus clustering algorithm, principal component analysis, immune cell infiltration and screening core genes were used to find their action mechanisms and potential biomarkers. Results Finally, 10 differential genes related to cuproptosis were screened. The correlation analysis of differential genes related to cuproptosis showed a strong positive correlation between GLS and DBT (r =0. 78, P<0. 001), while NLRP3 showed a strong negative correlation with DBT and GLS (r =-0. 62, P<0. 001). GO enrichment analysis of differential genes related to cuproptosis was mainly related to copper ion transport and copper homeostasis, and KEGG analysis showed that it was mainly enriched in platinum resistance, mineral absorption and central carbon metabolic pathway in cancer. The PPI network analysis and MCODE were used to screen core genes. The results of immune cell infiltration showed that M2 macrophages, M0 macrophages, resting CD4 memory T cells, and CD8+ T cells were dominant (P<0. 05). The correlation analysis of differential genes related to immune cells and cuproptosis showed that in the early stage of atherosclerosis, GLS was strongly positively correlated with activated NK cells (r =0. 52, P<0. 001), FDX1 and SLC31A1 was strongestly negatively correlated with CD8+ T cells (r = -0. 51, P<0. 001); in the advanced stage of atherosclerosis, FDX1 was strongestly positively correlated with M0 macrophages (r =0. 58, P<0. 001) and FDX1 was strongestly negatively correlated with CD8+ T cells (r =-0. 55, P<0. 001). Principal component analysis showed that two subtypes C1 and C2 could be clearly distinguished according to the expression of cuproptosis-related differential genes. Conclusion The immune-related changes between cuproptosis and the development of atherosclerosis may be the key to the diagnosis and treatment of early and advanced atherosclerosis, and the core genes SLC31A1, MTF1, ATP7B and ATP7A may be potential markers and therapeutic targets for the development of atherosclerosis. [ABSTRACT FROM AUTHOR]

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Data center is one of the indispensable infrastructures in the modern information society, however, its high energy consumption and carbon emission have become an urgent problem. In order to reduce the large energy consumption of data centers in hot and humid areas due to mechanical cooling and air-conditioning systems, the operation of an indirect evaporative cooling (IEC) air-conditioning system was simulated in a hot and humid area data center based on Matlab and the Energy Plus platform, its annual energy consumption was evaluted. The impact of solar assisted dehumidification (LDD) system on the three operation modes and the performance of IEC air-conditioning system were also investigated. The results show that the IEC air-conditioning system can achieve 16.5% annual energy saving intensity compared to a conventional mechanical cooling system, and that the addition of an LDD unit can increase the wet mode operating time of the IEC air-conditioning system by 35.9% and reduce the system energy consumption by 20.1%. Therefore, IEC air-conditioning systems have significant energy-saving advantages in hot and humid data centers and can significantly improve the operational efficiency and sustainability of data center air-conditioning systems. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Shanghai Jiaotong University (Medical Science) is the property of Journal of Shanghai Jiaotong University (Medical Science) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To evaluate the adaptability of female teachers with breast cancer who returned to work after surgery in Xinjiang and to analyze the influencing factors so as to provide a scientific basis for female teachers with cancer to better return to work. Methods A convenience sampling method was used to investigate the female teachers who had returned to work after breast cancer surgery from 2019 to 2021, with the questionnaires including the general information questionnaire, the adaptation scale for returning to work for cancer patients, the simplified scale for fear of disease progression for cancer patients, and the social support scale. Multiple linear regression was used to explore the influencing factors of patients' adaptability to return to work. Results Totally 200 female teachers with breast cancer after surgery were investigated. The scores of adaptability to return-to-work and fear of disease progression were (60.19 ± 10.98) and (32.18 ± 6.19), respectively, while the score of social support was(37.08 ± 8.14). The results of multiple linear regression analysis showed that the scores of adaptability to return -to -work of patients with undergraduate and master's degree education increased by 1.063 and 1.156, respectively, compared with patients with junior college degrees and/or below. Compared with patients who underwent mastectomy, the score of adaptability to return -to -work of patients undergoing breast-conserving surgery increased by 2.136 points, and that of front-line teachers decreased by 2.001 points compared with administrative patients. Compared with patients in public education institutions, the scores of adaptability to return-towork of patients in private education institutions decreased by 2.249 points. When the scores of FoP -Q -SF and SSRS increased by 1 point, the scores of adaptability to return-to-work increased by -1.241 and 1.456 points, respectively. All differences were statistically significant (P < 0.01). Conclusions The female teachers' level of adaptability to return-to - work after breast cancer surgery in Xinjiang needs to be improved, and the relevant departments should pay attention to the care and social support for female teachers with low educational levels, with mastectomy, in front-line teaching posts, or in private educational institutions, so as to improve their adaptability to return to work. [ABSTRACT FROM AUTHOR]

[Objective] Pineapple is a common tropical fruit, and its ripeness has an important impact on the storage and marketing. It is particularly important to analyze the maturity of pineapple fruit before picking. Deep learning technology can be an effective method to achieve automatic recognition of pineapple maturity. To improve the accuracy and rate of automatic recognition of pineapple maturity, a new network model named MobileNet V3-YOLOv4 was proposed in this study. [Methods] Firstly, pineapple maturity analysis data set was constructed. A total of 1580 images were obtained, with 1264 images selected as the training set, 158 images as the validation set, and 158 images as the test set. Pineapple photos were taken in natural environment. In order to ensure the diversity of the data set and improve the robustness and generalization of the network, pineapple photos were taken under the influence of different factors such as branches and leaves occlusion, uneven lighting, overlapping shadows, etc. and the location, weather and growing environment of the collection were different. Then, according to the maturity index of pineapple, the photos of pineapple with different maturity were marked, and the labels were divided into yellow ripeness and green ripeness. The annotated images were taken as data sets and input into the network for training. Aiming at the problems of the traditional YOLOv4 network, such as large number of parameters, complex network structure and slow reasoning speed, a more optimized lightweight MobileNet V3-YOLOv4 network model was proposed. The model utilizes the benck structure to replace the Resblock in the CSPDarknet backbone network of YOLOv4. Meanwhile, in order to verify the effectiveness of the MobileNet V3-YOLOv4 network, MobileNet V1-YOLOv4 model and MobileNet V2-YOLOv4 model were also trained. Five different single-stage and two-stage network models, including R-CNN, YOLOv3, SSD300, Retinanet and Centernet were compared with each evaluation index to analyze the performance superiority of MobileNet V3-YOLOv4 model. [Results and Discussions] MobileNet V3-YOLOv4 was validated for its effectiveness in pineapple maturity detection through experiments comparing model performance, model classification prediction, and accuracy tests in complex pineapple detection environments. The experimental results show that, in terms of model performance comparison, the training time of MobileNet V3-YOLOv4 was 11,924 s, with an average training time of 39.75 s per round, the number of parameters was 53.7 MB, resulting in a 25.59% reduction in the saturation time compared to YOLOv4, and the parameter count accounted for only 22%. The mean average precision (mAP) of the trained MobileNet V3-YOLOv4 in the verification set was 53.7 MB. In order to validate the classification prediction performance of the MobileNet V3-YOLOv4 model, four metrics, including Recall score, F1 Score, Precision, and average precision (AP), were utilized to classify and recognize pineapples of different maturities. The experimental results demonstrate that MobileNet V3- YOLOv4 exhibited significantly higher Precision, AP, and F1 Score the other. For the semi-ripe stage, there was a 4.49% increase in AP, 0.07 improvement in F1 Score, 1% increase in Recall, and 3.34% increase in Precision than YOLOv4. As for the ripe stage, there was a 6.06% increase in AP, 0.13 improvement in F1 Score, 16.55% increase in Recall, and 6.25% increase in Precision. Due to the distinct color features of ripe pineapples and their easy differentiation from the background, the improved network achieved a precision rate of 100.00%. Additionally, the mAP and reasoning speed (Frames Per Second, FPS) of nine algorithms were examined. The results showed that MobileNet V3-YOLOv4 achieved an mAP of 90.92%, which was 5.28% higher than YOLOv4 and 3.67% higher than YOLOv3. The FPS was measured at 80.85 img/s, which was 40.28 img/s higher than YOLOv4 and 8.91 img/s higher than SSD300. The detection results of MobileNet V3-YOLOv4 for pineapples of different maturities in complex environments indicated a 100% success rate for both the semi-ripe and ripe stages, while YOLOv4, MobileNet V1-YOLOv4, and MobileNet V2-YOLOv4 exhibited varying degrees of missed detections. [Conclusions] Based on the above experimental results, it can be concluded that MobileNet V3-YOLOv4 proposed in this study could not only reduce the training speed and parameter number number, but also improve the accuracy and reasoning speed of pineapple maturity recognition, so it has important application prospects in the field of smart orchard. At the same time, the pineapple photo data set collected in this research can also provide valuable data resources for the research and application of related fields. [ABSTRACT FROM AUTHOR]

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Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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