Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2022-04-07 Cooperative journals: 《计算机应用研究》
Abstract： Aiming at solving problems of dislocation and artifacts in the stitching of large parallax UAV images, this paper proposed a method to find the best stitching seam based on quality evaluation QEB-U. First, the initial seam was estimated by conventional seam estimation. Then, a new quality evaluation function was proposed for evaluating each pixel on the seam according to the characteristics of the UAV image like the structural similarity, color difference, and texture complexity. The difference cost was updated according to the evaluation result and the seam was acquired after that. The estimation and evaluation process was repeated until the seam becomes stable that the iteration was stopped. Finally, the stitching UAV image was generated by gradient fusion. The experimental results showed that the proposed method can avoid dislocation and artifacts in the stitching of large parallax UAV images, which was superior to several current UAV image stitching methods. Besides, the obtained stitching seam preferentially passed through roads, woodlands, etc. It was more in line with human visual perception and performed well in common image clarity evaluation indicators.
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-08-13 Cooperative journals: 《计算机应用研究》
Abstract： Fatigue driving is one of the main causes of traffic accidents, particularly for drivers of large vehicles like buses and heavy trucks. For designing driver fatigue monitoring systems, the visual features based techniques is one of the most effective approaches. This paper proposed a hierarchical convolutional neural network model with multi-scale pooling for vision-based fatigue detection system. The first step is face detection and extraction of eye and mouse regions by deep learning model—MTCNN. In order to solve the problem of characterization and recognition of eye and mouth regions, this paper proposed a multi-scale pooling model（MSP）based on ResNet to train different states of eye and mouth. In real-time detection, the paper recognized the states of eye and mouth by the pre-trained convolutional neural network model. Finally, this paper detect fatigue through the PERCLOS and the frequency of open mouth (FOM) . The experimental results show that the proposed algorithm has high detection accuracy, real-time performance and high robustness to complex environments.
Subjects: Biology >> Botany submitted time 2022-12-01 Cooperative journals: 《广西植物》
Abstract：
In order to obtain the optimal conditions for the protoplast preparation of Pleurotus giganteus, two strains, PG46 and PG79, with different temperature types, were selected as materials to study the effects of five factors (mycelial age, osmotic stabilizer type, lywallzyme concentration, enzymatic hydrolysis duration and enzymatic hydrolysis temperature) based on single-factor and orthogonal experimental methods. The results were as follows: (1) In the single factor test, the optimal conditions for the protoplast preparation of P. giganteus were mycelial culture for 5 days, using 2.5% lywallzyme with 0.6 mol·L-1 mannitol, incubated for 4 h at 32 ℃ (PG46) or 27-35 ℃ (PG79). (2) Orthogonal experiment verified and optimized the single factor test results. Combination 2 (mycelial age 5 d, lywallzyme concentration 2.5%, 0.6 mol·L-1 mannitol, incubated for 4 h at 32 ℃) was the optimal condition for the protoplast preparation of PG46 and PG79, and the protoplast yields were 11.2 × 106 CFU·mL-1 and 7.28 × 106 CFU·mL-1, respectively. (3) For F-test, the influence degree of various factor on the protoplast preparation were as follows: mycelial age>lywallzyme concentration>enzymatic hydrolysis temperature>enzymatic hydrolysis duration (PG46), and mycelial age>enzymatic hydrolysis duration>enzymatic hydrolysis temperature>lywallzyme concentration (PG79), respectively. In conclusion, the protoplast preparation conditions of the two P. giganteus strains with different temperature types were basically the same, and the effects of mycelial age on the protoplasts yield of the two strains was the most significant. The results can lay a foundation for further cross-breeding, genetic transformation, whole genome sequencing and promote the molecular genetics development of P. giganteus.
Subjects: Biology >> Botany >> Applied botany submitted time 2019-08-26 Cooperative journals: 《广西植物》
Abstract： In this research, Barnardia japonica that were introduced from Changbai Mountain to the Flower Research Institute of Northeast Forestry University were used as experimental material to explore the annual growth rhythm and flower bud differentiation in Harbin. The annual growth rhythm was studied by field observation method, and the morphological and anatomical features of each stage of flower bud differentiation were observed by paraffin sectioning. The results indicated that: the annual growth rhythm of B. japonica could be divided into four periods: flower bud differentiation and development phase, flowering phase, fruiting phase and dormancy phase; the flower bud differentiation process of B. japonica could be divided into seven stages: In early-middle April, the bulbs were still in the undifferentation phase due to the low soil temperature; The inflorescence primordium differentiation phase appeared in late April; 1In early May, the primordium differentiated; The florets primordial differentiation arised in late May; In end of May and early June, the primordium was differentiated; The stamen primordium differentiation phase happened in early June; the pistil primordium differentiated in late June; The flowering phase was in late June and early July.This study clarified the anatomical characteristics of each stage of flower bud differentiation of B. japonica, which provided a scientific basis for garden application and breeding of new varieties.
Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2023-08-22
Abstract： Nursing is a comprehensive discipline, and physical exercise has an extremely important role in the development of students' physical health and psychological quality, at the same time, clinical operation ability is one of the basic skills that nursing students must master, therefore, this paper aims to explore the impact of physical exercise on nursing students' clinical operation ability through the correlation analysis of nursing students' physical education results and clinical operation ability, in order to provide reference for nursing teaching. Nursing teaching to provide reference, the research team to a university in Beijing nursing students put the questionnaire, and randomly selected 180 valid questionnaires using SPSS27.0 software for the questionnaire results of the correlation analysis, the results show that: nursing operation ability and sports performance is highly positively correlated (r = 0.865P<0.01) and the vast majority of nursing students in the process of professional learning and daily life feel that there is a positive relationship between physical exercise and clinical operation ability, and the majority of nursing students in professional learning and daily life process. The majority of nursing students in the process of professional learning and daily life feel more pressure (the number of people who chose "yes" accounted for 74% of the 180 questionnaires) Most of the students in the nursing study of the biggest pressure comes from the nursing of the physical discomfort (73%), and at the same time, the professional operation of nursing (65%) and the theory (62%) is also an important factor that causes the student The professional operation of nursing (65%) and theory (62%) are also important factors causing students' stress. At the same time for the future into the society of the confusion also let nursing students feel more pressure (59%), although other factors only accounted for 6%, but the main factors given by the students are generally the family for the future development of the profession is not optimistic, and students have difficulty in establishing a good communication channel with the patient, which caused a certain degree of pressure on the students. Therefore, through this study, we can see that there is a high positive correlation between nursing students' nursing competence and sports performance, and we believe that sports is one of the key factors that can effectively reduce the stress of nursing students in their professional learning.
Peer Review Status:
Awaiting Review
submitted time 2024-01-08
Abstract： This article aims to explore the impact of the COVID-19 pandemic on the mental health of nurses, as well as the pressure and coping strategies in ethical decision-making. The COVID-19 pandemic has put enormous pressure on the global healthcare system, especially on nurses who are a vital component. Nurses not only face high-intensity work pressure and infection risks, but also have to deal with complex ethical decision-making, such as fair allocation of medical resources and balancing patient privacy and dignity in epidemic prevention and control. These pressures may have significant impacts on the mental health of nurses, including stress, anxiety, depression, and fatigue. The mental health problems of nurses may also affect their ability to make ethical decisions. Therefore, in order to improve the working environment of nurses, increase their job satisfaction, and enhance the treatment effectiveness and satisfaction of patients, it is important to understand the impact of the pandemic on the mental health of nurses and their ethical decision-making.
Peer Review Status:Awaiting Review
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2023-11-17 Cooperative journals: 《中国全科医学》
Abstract： Background Hepatocellular carcinoma（HCC） is the third leading cause of common cancer-related mortality globally，accounting for approximately 90% of all primary liver cancer cases. Its recurrence and mortality rates are high，with the underlying molecular mechanisms remaining unclear. Objective To explore potential molecular mechanisms of HCC and explore novel biomarkers. Methods Gene expression profile GSE62232 was retrieved from the GEO database，RNA-seq expression data and clinical information were retrieved from TCGA database，differential gene expression analysis was conducted between normal liver tissue and HCC tissue. Enrichment analysis on the differentially expressed genes was performed. Based on the gene expression data profiles of HCC and GSE62232 in TCGA，a co-expression network was established using the WGCNA R package，and weighted gene co-expression network analysis（WGCNA） was performed to select clinically significant modules and screen candidate Hub genes；the candidate Hub genes were further analyzed for significant differential expression in HCC tissues and normal liver tissues，and whether they were significantly correlated with the overall survival and disease-free survival of HCC patients. The hub genes were conclusively identified，and their protein expression was validated through the Human Protein Atlas database. Results The genetic expression data in this study were obtained from 50 normal liver tissue samples and 373 HCC tissue samples. Through differential gene expression analysis，a total of 7 230 genes differential expression between HCC and normal hepatic tissue，comprising 3 691 up-regulated genes and 3 539 down-regulated genes in HCC were identified. Enrichment analysis showed that the up-regulated differentially expressed genes were mainly involved in cell cycle regulation and mitotic processes；the down-regulated differentially expressed genes were mainly involved in processes such as small molecule metabolism and organic acid metabolism. WGCNA identified 19 gene modules related to the clinical features of HCC patients，the cyan and purple modules were screened by analyzing the relationship between the modules and the clinical features. The first two genes in the cyan module genes that were strongly associated with both overall survival and disease-free survival of patients were VPS45 and FAM189B. In the purple module genes，first two genes that were strongly associated with both overall survival and disease-free survival of patients were CLEC1B and FCN3，respectively；therefore，VPS45，FAM189B，CLEC1B and FCN3 were identified as the final Hub genes. Immunohistochemical staining in the Human Protein Atlas database showed that VPS45 and FAM189B were expressed higher in HCC tissues than in normal liver tissues. FCN3 was expressed in HCC tissues lower than in normal liver tissues，the difference in the expression of CLEC1B between HCC tissues and normal liver tissues was not obvious. Conclusion VPS45，FAM189B，CLEC1B and FCN3 have been preliminary identified as possible novel potential biomarkers for HCC，which may provide a theoretical basis for targeted therapy of HCC.
Subjects: Psychology >> Other Disciplines of Psychology Subjects: Psychology >> Developmental Psychology submitted time 2024-01-20
Shunsen Huang
Xiaoxiong Lai
Cai Zhang
Xinmei Zhao
Xinran Dai
Mengdi Qi
Huanlei Wang
Wenrong Wang
Yun Wang
Abstract： Adolescents frequently encounter elevated levels of digital stress by exposure to digital media (e.g., smartphone stress). Their ongoing brain development increases adolescents’ susceptibility to digital stress, making them more vulnerable to its adverse effects. Among digital devices, smartphones are the most widely used ones by adolescents and a primary source of digital stress. The current study aims to investigate the robust association between digital stress, specifically smartphone stress, and adolescent mental health. The study also aims to investigate the underlying mechanisms of this association.
In Study 1, a multiverse-style analysis was employed to investigate the robust relationship between smartphone stress and mental health (depression and well-being) in a large sample of adolescents (N=74,178, male=39,129). This method was chosen for its robustness of various data manipulations to test the effect of interest, and median β and NSRPD (number of significant results in predominant direction) were used as statistical inference indicators of the effect. In Study 2, we conducted an intensive longitudinal design to examine the mechanism of how smartphone stress affects mental health among adolescents (N=477, female=214, Mage=12.67±.31). Before intensive longitudinal design, we assessed smartphone stress, well-being, and depression (T1). Subsequently, daily rumination (consecutive 17 days, T2) and daily negative mood (consecutive 18 days, T3) were assessed over a 35-day period. Upon intensive longitudinal design, we once again measured well-being and depression (T4). We found that rumination, negative emotion (NE), and rumination-NE (serial mediation) mediate the link between smartphone stress and mental health (smartphone stress-depression model, smartphone stress-well-being model).
Study 1 indicated that over half of adolescents (52.6% of grade 4 students and 78.2% of grade 8 students) experienced smartphone stress. Furthermore, smartphone stress strongly and robustly predicted depression (Median β = 0.37, p < 0.001, NSRPD = 160/160, p < 0.001, partial r2 = 0.172) and well-being (Median β = -0.14, p < 0.001, NSRPD = 160/160, p < 0.001, partial r2 = 0.011). Effect sizes from both outcomes (partial r2 > .010) are capable to inform policy and the public sphere. Study 2 revealed that rumination intensity, negative emotion intensity, and rumination-negative emotion intensity mediate the relationship between smartphone stress and depression. However, no mediation was found for rumination or negative emotion fluctuation. In smartphone stress-well-being model, negative emotion intensity and rumination-negative emotion intensity, but not rumination intensity, mediated the association between smartphone stress and well-being. Moreover, negative emotion and rumination-negative emotion fluctuation, but not rumination fluctuation, mediated the association between smartphone stress and well-being. Therefore, the intensity and fluctuation of rumination and negative emotion are common mediators in the relationship between smartphone stress and depression/well-being, while the effects of mechanisms are outcome-dependent.
The findings pinpoint the significant and robust effect of smartphone stress on depression and well-being among adolescents. The mediation of rumination and negative emotion in the relationship between smartphone stress and mental health probes into the mechanism of this relationship. These results support classic theories (e.g., the Emotional Cascade Model) and confirm and enrich the recent Media use-Digital stress-Mental health model. These findings could also inform future interventions for mental health problems related to smartphone stress.
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2023-04-18 Cooperative journals: 《中国全科医学》
LIU Minghao
WANG Pan
GAO Lijian
XU Shuqing
WANG Huanhuan
ZHAO Guangxian
CHEN Jue
QIAO Shubin
XU Bo
YUAN Jinqing
Abstract： Background Percutaneous coronary intervention（PCI）via distal transradial artery approach（dTRA）is effective in reducing the incidence of radial artery occlusion，however，there are no reports on the feasibility，safety and timing of secondary PCI via dTRA domestically. Objective To explore the feasibility，safety and timing of secondary PCI via dTRA. Methods A total of 70 patients who were to undergo secondary PCI via dTRA in Fuwai Hospital，CAMS&PUMC from July 2021 to July 2022 were consecutively included and divided into ≤ 30 d group（n=33） and >30 d group（n=37） according to the time interval since the last PCI via dTRA. The general clinical data，operation-related indicators，coronary artery lesions and radial artery inner diameters at 5，10 and 15 cm proximal to the radial styloid process before and 24 h after PCI were compared between the two groups. Results dTRA puncture and catheterization were successfully conducted in 69 of 70 patients，with a success rate of 98.6%（69/70）. Second PCI via dTRA was successfully completed in 66 of 67 patients assessed for secondary PCI，with a success rate of 98.5%（66/67）. There were significantly difference in age，platelet count，incidence of diabetes，left main artery lesion and chronic total occlusion between the two groups（P<0.05）. The compression bandage was released 3h after surgery，and the radial artery pulsation on the puncture side was palpable immediately and 24 h after surgery，and none of the patients occurred radial artery occlusion，with the radial artery patency rate of 100.0%（69/69）. The radial artery inner diameters at 5，10 and 15cm proximal to the radial styloid process in ≤ 30 d group were significantly greater than that in >30d group before and 24 h after PCI，（P<0.05）when comparing between the two groups，respectively. Radial artery inner diameter at 15 cm proximal to the radial styloid process 24 h after PCI was smaller than that before surgery in ≤ 30 d group，radial artery inner diameter at 5 cm proximal to the radial styloid process 24 h after PCI was smaller than that before surgery in >30 d group（P<0.05）. Conclusion Secondary PCI via dTRA is and feasible to perform secondary PCI via dTRA independent of first dTRA PCI time（≤ 30 days or >30 days from the first dTRA PCI），and the timing of secondary PCI via dTRA should be determined according to the patient's condition and puncture site.
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2022-12-23 Cooperative journals: 《中国全科医学》
Abstract： Background Intervention of coronary artery disease via distal radial artery access (dTRA) in the snuffbox area can significantly reduce the incidence of radial artery occlusion. However, repeated application via dTRA has not been reported domestically. Objective The study aimed to analyze the effectiveness and safety of secondary coronary artery intervention via dTRA retrospectively, as well as to analyze temporal effect on effectiveness and safety of dTRA intervention. Methods In this study, patients who underwent secondary coronary intervention via dTRA in Fuwai Hospital from July 2021 to July 2022 were continuously enrolled, and were divided into 2 groups: group of secondary intervention within 30 days (including 30 days) and group of intervention more than 30 days according to the interval between two dTRA interventions. Demographic information, history of transradial coronary intervention, time of first dTRA intervention, other comorbidities, smoking history, basic laboratory examination indicators for admission were collected. Technical indicators related to dTRA puncture and catheterization, coronary angiography and intervention, and coronary lesions were recorded. Complications like bleeding, hematoma, and compression time, radial artery pulse 24 hours after surgery were evaluated. The ultrasound of the radial artery before and 24 hours after intervention were recorded, and the diameter of the radial artery at 5cm, 10 cm and 15 cm at the proximal end of the radial styloid process was measured. Results A total of 70 patients were included in this study, including 56 males and 14 females, with an average age of 60.96�10.02 years. The median time from the previous transdistal radial intervention was 33 days. dTRA puncture were successfully conducted in 69 patients, with a success rate of 98.6%, an average number of punctures of 1.62, and an average puncture time of 3.41 minutes. The average angiography time was 8.96 minutes. The median exposure time was 1155 seconds, and the median radiation dose was 2460 mGy. One patient (1.4%) applied a 5F sheath, while 53 patients (76.8%) received a 6F sheath and 15 patients received a thin-wall domestic 7F sheath (23.8%). 6 patients (8.7%) received angiography with 6F catheter while other patients received angiography with 5F TIG catheter. PCI was successfully conducted in 66 of 67 patients, with a median PCI time of 46 minutes. One patient suffered dTRA-related complication after surgery (swelling of the hand and forearm), which was graded EASY II-III. Other patients recovered well without bleeding, hematoma, motor and sensory dysfunction of hand. All patients via dTRA access were removed compression bandage 3 hours after intervention. The radial pulse on the puncture side can be palpated immediately and 24 hours after intervention, and no abnormality was found compared with the contralateral side. Postoperative radial artery ultrasound showed no radial artery occlusion in all patients. It was indicated that the proximal, middle and distal segment of radial artery tended to be narrower in group of more than 30 days both in pre and post intervention. In group of within 30 days (including 30days), the proximal segment of radial artery was significantly narrower post intervention In group of more than 30 days, the distal segment of radial artery tended to be wider post intervention, which was statistically significant. Conclusion The study confirmed that dTRA is a safe, feasible and practical access for secondary coronary intervention. The timing of intervention (within 30 days or more) does not affect the effectiveness and safety of secondary intervention via dTRA.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： The Qinghai-Tibet Plateau is the source of major Asian rivers such as the Yangtze River, the Yellow River, and the Yarlung Zangbo River, which is known as Asia’s water tower. Analysis on the evolution rule and variation trend of surface water and groundwater resources in the Qinghai-Tibet Plateau is of great strategic and scientific importance to the water resources, water ecological protection, and future regional development of the Qinghai-Tibet Plateau. Based on the analysis of the observed runoff series of hydrological stations in the main rivers within source areas, it is found that the surface runoffs in most areas of the Qinghai-Tibet Plateau show an increasing trend impacted by climate change in terms of more precipitation and rising temperature, and indicates significant changes in seasonal processes. The runoffs increase more significantly in the source areas of the Yangtze, Nujiang, and Yarlung Zangbo rivers. The results demonstrate that the dominant factor is increased glacier and snow melting flow to more groundwater and growth of plateau lakes, due to temperature rising. With the depletion of glacier and snowpack, the melting water will be reduced in future. Therefore, the break point of increase to decrease will arise in some river runoffs. Thus, the water security of this region will face new problems and challenges. High attention should be paid to the global change impact to water resources evolution in the Qinghai-Tibet Plateau, and positive responsive measures should be taken.
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