29 results on '"Jiajia Peng"'
Search Results
2. Assessing immune evasion potential and vaccine suitability of a feline panleukopenia virus strain
- Author
-
Jiakang Li, Yue Zeng, Jiajia Peng, Yongqi Zhou, Luying Li, Ying Wang, Zijun Ye, QingXiu Chen, Quanhui Yan, Qiuyan Li, Shengbo Cao, and Dengyuan Zhou
- Subjects
Feline panleukopenia virus (FPV) ,Immune evasion ,FPV vaccine ,neutralizing titer ,neutralizing index ,Veterinary medicine ,SF600-1100 - Abstract
Since the introduction of the feline panleukopenia virus (FPV) vaccine in China in 2011, it has played a crucial role in safeguarding the health of numerous pet cats by preventing FPV infections. However, an observed rise in FPV infections among cats previously vaccinated has prompted our investigation. Our laboratory has identified a specific FPV isolate, FPV-251, which raises concerns about its potential to evade the immune response. To validate this hypothesis, we conducted a correlational study on FPV-251. Ten sera samples were collected from ten cats two months after receiving the vaccine three times. These samples were prepared in the laboratory to assess their ability to neutralize FPV-251. Results indicated that the neutralization titers of the 10 sera ranged from 1:313.7 to 1:1051.0, with an average titer of 1:627.4. Considering the diversity and complexity of clinical practice, we expanded our study to include 86 sera samples collected from cats at the clinic after three-time immunizations. Among these, 8 out of 43 sera collected after one year post three-time immunizations and 5 out of 43 sera collected within one year post three-time immunizations exhibited a neutralization index (NI) of less than 50 against FPV-251. Despite its potential immune evasion capabilities, immunization with inactivated FPV-251 demonstrated effectiveness in providing substantial protection for cats. This was evident from the high levels of sera antibodies against FPV-251 in cats with FPV-251 immunization, as well as their ability to survive and maintain good health after being challenged with FPV-251. Furthermore, sera antibodies from immunized cats displayed the ability to neutralize the other five FPV isolates, indicating a robust cross-protection capacity of the FPV-251 vaccine. Our research findings suggest that although FPV-251 may exhibit certain immune evasion capabilities, it holds significant potential for development into a vaccine to protect pet cats from FPV infection.
- Published
- 2024
- Full Text
- View/download PDF
3. Isolation of a feline-derived feline panleukopenia virus with an A300P substitution in the VP2 protein and confirmation of its pathogenicity in dogs
- Author
-
Jiakang Li, Jiajia Peng, Yue Zeng, Ying Wang, Luying Li, Yiran Cao, Longlong Cao, QingXiu Chen, Zijun Ye, Dengyuan Zhou, Shengbo Cao, and Qiuyan Li
- Subjects
Feline panleukopenia virus ,FPV ,Dogs ,VP2 gene characteristic ,Host range ,Veterinary medicine ,SF600-1100 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Feline panleukopenia virus (FPV) is a single-stranded DNA virus that can infect cats and cause feline panleukopenia, which is a highly contagious and fatal disease in felines. The sequence of FPV is highly variable, and mutations in the amino acids of its capsid protein play crucial roles in altering viral virulence, immunogenicity, host selection, and other abilities. In this study, the epidemiology of FPV was studied using 746 gastrointestinal swab samples derived from cats that presented gastrointestinal symptoms specifically, diarrhea or vomiting during the period spanning from 2018 to 2022. The overall prevalence of FPV-positive patients among these samples was determined to be 45.4%. Capsid (virion) protein 2 (VP2) gene of each FPV-positive sample was sequenced and amplified, yielding 65 VP2 sequences. Among them, six VP2 gene sequences were detected in the majority of the samples test positive for FPV, and these positive samples originated from a diverse range of geographical locations. These isolates were named FPV-6, FPV-10, FPV-15, FPV-251, FPV-271 and FPV-S2. Additionally, the substitution of Ala300Pro (A300P) in VP2 was detected for the first time in feline-derived FPV (FPV-251). FPV-251 isolate, with this substitution in VP2 protein, exhibited stable proliferative capacity in Madin-Darby canine kidney (MDCK) cells and A72 cells. FPV-271 was selected as the FPV control isolate due to its single amino acid difference from VP2 protein of FPV-251 at position 300 (FPV-271 has alanine, while FPV-251 has proline). After oral infection, both FPV-251 and FPV-271 isolates caused feline panleukopenia, which is characterized by clinical signs of enterocolitis. However, FPV-251 can infect dogs through the oral route and cause gastrointestinal (GI) symptoms with lesions in the intestine and mesenteric lymph nodes (MLNs) of infected dogs. This is the first report on the presence of an A300P substitution in VP2 protein of feline-derived FPV. Additionally, FPV isolate with a substitution of A300P at VP2 protein demonstrated efficient replication capabilities in canine cell lines and the ability to infect dogs.
- Published
- 2024
- Full Text
- View/download PDF
4. Study on Flavor Characteristics and Nutritional Evaluation of Free Amino Acids in Walnut Pellicle
- Author
-
Jiajia PENG, Xiaojun ZHANG, Xin TIAN, Yanjun YANG, Guofeng DUAN, Peng GAO, and Qunlong LIU
- Subjects
walnut ,pellicle ,flavor amino acids ,taste ,Food processing and manufacture ,TP368-456 - Abstract
In order to explore the composition, taste characteristics and nutritional value of free amino acids in pellicle of different varieties of walnut, the content of free amino acid in the pellicle of 6 walnut varieties was detected, and the taste activity value (TAV) analysis, principal component analysis and comprehensive evaluation were carried out. The results showed that a total of 17 free amino acids could be detected in the pellicle of walnut, with a total content of 2673.86~3490.12 mg/kg. Nine medicinal amino acids accounted for 57.67%~68.23% of the total amino acids, and Leu was the first limiting amino acid in the pellicle. Glu, Asp, Thr, Cys and Arg were the main amino acids of free amino acids in the pellicle, with Glu having the highest content. The TAV value of Glu among the six cultivars was 2.34~3.81, which contributed the most to the umami of the pellicle. The TAV values of Arg in 'Jing 861', 'Bokexiang' and 'Jinboxiang 8' were 1.03~1.26, which contributed to the bitterness of the pellicle. Among the flavor amino acids, the content of umami amino acids was the highest, while aromatic amino acids had the lowest contentm. The ratio of bitter to sweet amino acid content in the 'Nonghe 1', 'Jing 861', 'Bokexiang' and 'Jinboxiang 8' was greater than 1. While the ratio of bitter to sweet amino acid content in the 'Fenhe 2' and ' Fenhe 4' was less than 1. The comprehensive quality of amino acids was also relatively higher. The amino acids in pellicle had high nutritional value and medicinal value, and the taste was bitter, as a food auxiliary material to supplement Thr, Ile and sulfur-containing amino acids, it could increase the overall taste richness of food.
- Published
- 2023
- Full Text
- View/download PDF
5. Yarn-level deformation for weft-knitted stitches
- Author
-
Peixiao Zheng, Gaoming Jiang, Jiajia Peng, and Bingxian Li
- Subjects
Materials of engineering and construction. Mechanics of materials ,TA401-492 ,Chemical technology ,TP1-1185 ,Textile bleaching, dyeing, printing, etc. ,TP890-933 - Abstract
The essential purpose of this research is to exploit and innovate a yarn-level relaxation deformation method for weft-knitted stitches. Each loop formed by knitting yarns was taken as a mass respectively. Spring-mass model at the yarn level was established for several knitting rows and spatial coordinates were assigned to each mass. Based on the intermeshed relationship of loops in the longitudinal direction, the spring-mass model at the yarn level was transformed into a two-layer spring-mass model at the stitch level, with correspondence between the masses of the two models. Each mass was subjected to eight spring forces from different directions. The resultant force was calculated based on the yarn-level mass model, and the mass displacement was solved by the Verlet numerical integration method. According to the coordinates of masses, the geometric models of different knitting types were established, and a matrix operation method for the spatial rotation and translation of control points was proposed, which could quickly calculate the coordinates and accurately simulate the shape of loops. Finally, we simulated the relaxation deformation of five typical weft-knitted stitches. The results show that this method can accurately and effectively simulate the overall deformation effect of the knitted stitches, and the simulation results are similar to the actual results. The analysis results of the pattern size and the simulation efficiency indicate that the larger the pattern, the more loops there are, the overall simulation time is longer and the running memory occupied is larger.
- Published
- 2023
- Full Text
- View/download PDF
6. A Unified Visual and Linguistic Semantics Method for Enhanced Image Captioning
- Author
-
Jiajia Peng and Tianbing Tang
- Subjects
image captioning ,image features ,clustering mechanism ,Chinese language description ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Image captioning, also recognized as the challenge of transforming visual data into coherent natural language descriptions, has persisted as a complex problem. Traditional approaches often suffer from semantic gaps, wherein the generated textual descriptions lack depth, context, or the nuanced relationships contained within the images. In an effort to overcome these limitations, we introduce a novel encoder–decoder framework called A Unified Visual and Linguistic Semantics Method. Our method comprises three key components: an encoder, a mapping network, and a decoder. The encoder employs a fusion of CLIP (Contrastive Language–Image Pre-training) and SegmentCLIP to process and extract salient image features. SegmentCLIP builds upon CLIP’s foundational architecture by employing a clustering mechanism, thereby enhancing the semantic relationships between textual and visual elements in the image. The extracted features are then transformed by a mapping network into a fixed-length prefix. A GPT-2-based decoder subsequently generates a corresponding Chinese language description for the image. This framework aims to harmonize feature extraction and semantic enrichment, thereby producing more contextually accurate and comprehensive image descriptions. Our quantitative assessment reveals that our model exhibits notable enhancements across the intricate AIC-ICC, Flickr8k-CN, and COCO-CN datasets, evidenced by a 2% improvement in BLEU@4 and a 10% uplift in CIDEr scores. Additionally, it demonstrates acceptable efficiency in terms of simplicity, speed, and reduction in computational burden.
- Published
- 2024
- Full Text
- View/download PDF
7. Diversity of clinical phenotypes in a cohort of Han Chinese patients with PAX6 variants
- Author
-
Lijuan Huang, Jiajia Peng, Yan Xie, Yunyu Zhou, Xiaolin Wang, Hui Wang, Jingang Gui, and Ningdong Li
- Subjects
aniridia ,PAX6 gene ,mutation ,phenotype ,minigene ,Genetics ,QH426-470 - Abstract
The PAX6 gene plays an important role in ocular development. Mutations of the PAX6 gene may result in a series of ocular abnormalities, including congenital aniridia, anterior segment dysgenesis (ASD), progressive corneal opacification, glaucoma, and hypoplasia of the fovea and optic nerve, leading to reduced visual acuity and even blindness. This study aimed to describe the diversity of clinical features caused by PAX6 pathogenic variants in 45 Han Chinese patients from 23 unrelated families. All patients underwent detailed clinical assessment. Genetic testing was performed to identify pathogenic variations in the PAX6 gene by next-generation sequencing, minigene splicing assay, RT-qPCR, and long-range PCR. Twenty pathogenic variations were detected in the PAX6 gene from 12 pedigrees and 11 sporadic patients, of which 12 were previously reported and 8 were novel. The clinical phenotypes obtained as a result of the PAX6 gene mutations were complicated and vary among patients, even among those who carried the same variants. Genetic testing is helpful for differential diagnosis. Our genetic findings will expand the spectrum of pathogenic variations in the PAX6 gene. PAX6 pathogenic variants not only cause defects in ocular tissues, such as the iris and retina, but also lead to maldevelopment of the whole eye, resulting in microphthalmia.
- Published
- 2023
- Full Text
- View/download PDF
8. Raindrop Size Distribution Characteristics of Heavy Precipitation Events Based on a PWS100 Disdrometer in the Alpine Mountains, Eastern Tianshan, China
- Author
-
Puchen Chen, Puyu Wang, Zhongqin Li, Yefei Yang, Yufeng Jia, Min Yang, Jiajia Peng, and Hongliang Li
- Subjects
raindrop size distribution ,PWS100 ,Tianshan Mountains ,heavy rainfall ,alpine areas ,Science - Abstract
As a key component of the hydrological cycle, knowledge and comprehension of precipitation formation and evolution are of leading significance. This study investigates the statistical characteristics of raindrop size distribution for heavy precipitation events with observations collected by a Present Weather Sensor (PWS100) disdrometer located in the alpine area of eastern Tianshan, China. The characteristics are quantified based on heavy rain, heavy snow, and hail precipitation events classified using the rainfall intensity and the precipitation-related weather codes (US National Weather Service). On average, the heavy precipitation events in the headwaters of the Urumqi River are dominated by medium-sized (2–4 mm) raindrops. As well, we investigate mass-weighted mean diameter–normalized intercept parameter scatterplots, which demonstrate that the heavy precipitation events in alpine regions of the Tianshan Mountains can be identified as maritime-like clusters. The concentration of raindrops in heavy precipitation is the highest overall, while the concentration of raindrops in heavy snow is the lowest when the diameter is lower than 1.3 mm. The power–law relationships of radar reflectivity (Z) and rain rate (R) [Z = ARb] for the heavy rain, heavy snow, and hail precipitation events are also calculated. The Z–R relationship of heavy rain and heavy snow in this work has a lower coefficient value of A (10 and 228.7, respectively) and a higher index value of b (2.6 and 2.1, respectively), and the hail events are the opposite (A = 551.5, b = 1.3), compared to the empirical relation (Z = 300R1.4). Furthermore, the possible thermodynamics and general atmospheric circulation that cause the distinctions in the raindrop size distribution characteristics between alpine areas and other parts of the Tianshan Mountains are also debated in this work. The headwaters of the Urumqi River in alpine areas have relatively colder and wetter surroundings in the near-surface layer than the foothills of the Tianshan Mountains during the precipitation process. Meanwhile, a lower temperature, a higher relative humidity, a more efficient collision coalescence mechanism, and glacier local microclimate effects (temperature jump, inverse glacier temperature, glacier wind) at the headwaters of the Urumqi River during the precipitation process are probably partly responsible for more medium- and large-size drops in the mountains.
- Published
- 2023
- Full Text
- View/download PDF
9. Raindrop size distribution characteristics in summer of a nival glacial zone in eastern Tianshan, Central Asia
- Author
-
Puchen Chen, Zhongqin Li, Puyu Wang, Min Yang, Yufeng Jia, and Jiajia Peng
- Subjects
drop size distribution (DSD) ,PWS100 ,rain rate ,nival glacial zone ,Tianshan Mountains ,Science - Abstract
Precipitation is a key component of the hydrological cycle, which is critical to understanding its formation and evolution. In this study, based on the observation data of the PWS100 located at the meteorological observation site at the terminal of Urumqi Glacier No. 1, eastern Tianshan Mountains, the statistical characteristics of the summer raindrop size distribution (DSD) were analyzed, and the DSD characteristics of five different rainfall rates(R) and two rainfall types (convective and stratiform) were investigated for the daytime and nighttime. The average raindrop spectral width was the largest in class III (1 < R < 5 mm h−1). The result showed that the raindrop concentration increased with the rainfall rate. The maximum raindrop concentration was at class IV (5 < R < 10 mm h−1), when the raindrop diameter was higher than 1.74 mm. The small and medium size raindrops played a dominant role in precipitation composition in the head watershed of the Urumqi River, contributing 98% of the total raindrop. The convective precipitation at the headwaters was divided into continental clusters. The stratiform/convective Dm-log10Nw was characterized by a large mass-weighted mean diameter Dm = 1.523/2.608, and a generalized intercept log10Nw = 2.841/3.469. N(D) of convective precipitation was significantly different between the daytime and nighttime, while that of stratiform precipitation was almost the same. The constraint relationship between R-Dm and R-log10Nw of these two precipitation types was deduced, the exponent of the R-log10Nw relationship of the two precipitation types was negative, and the Dm value of stratiform precipitation tended to be stable at a higher rainfall rate (1–2 mm). Finally, we deduced the power-law relationship between radar reflectivity (Z) and rain rate (R) [Z = A*Rb] for stratiform and convective precipitation at the headwaters. Z = 698.8R2.0 was for stratiform, and Z = 47.1R2.0 was for convective. These results, for the first time, offer insights into the microphysical nature of precipitation in the head watershed of the Urumqi River during the summer and provide essential information that could be useful for precipitation retrievals based on weather radar observations.
- Published
- 2022
- Full Text
- View/download PDF
10. Air pollution in heavy industrial cities along the northern slope of the Tianshan Mountains, Xinjiang: characteristics, meteorological influence, and sources
- Author
-
Yutian Luo, Liping Xu, Zhongqin Li, Xi Zhou, Xin Zhang, Fanglong Wang, Jiajia Peng, Cui Cao, Zhi Chen, and Heng Yu
- Subjects
Health, Toxicology and Mutagenesis ,Environmental Chemistry ,General Medicine ,Pollution - Published
- 2023
- Full Text
- View/download PDF
11. Comparison of Primary B/NKT Non‐Hodgkin Lymphomas in Nasopharynx, Nasal Cavity, and Paranasal Sinuses
- Author
-
Jiajia Peng, Jianqing Qiu, Danni Cheng, Yufang Rao, Minzi Mao, Ke Qiu, Junhong Li, Fei Chen, Feng Liu, Jun Liu, Xiaosong Mu, Wenxin Yu, Wei Zhang, Wei Xu, Yu Zhao, and Jianjun Ren
- Subjects
Otorhinolaryngology ,Surgery - Published
- 2023
- Full Text
- View/download PDF
12. The Relationship Between Sleep Traits and Tinnitus in UK Biobank: A Population-Based Cohort Study
- Author
-
Jiajia, Peng, Yijun, Dong, Yaxin, Luo, Ke, Qiu, Danni, Cheng, Yufang, Rao, Yao, Song, Wendu, Pang, Xiaosong, Mu, Chunhong, Hu, Hongchang, Chen, Wei, Zhang, Wei, Xu, Jianjun, Ren, and Yu, Zhao
- Subjects
Speech and Hearing ,Otorhinolaryngology - Abstract
Understanding the association between sleep traits and tinnitus could help prevent and provide appropriate interventions against tinnitus. Therefore, this study aimed to assess the relationship between different sleep patterns and tinnitus.A cross-sectional analysis using baseline data (2006-2010, n = 168,064) by logistic regressions was conducted to evaluate the association between sleep traits (including the overall health sleep score and five sleep behaviors) and the occurrence (yes/no), frequency (constant/transient), and severity (upsetting/not upsetting) of tinnitus. Further, a prospective analysis of participants without tinnitus at baseline (n = 9581) was performed, who had been followed-up for 7 years (2012-2019), to assess the association between new-onset tinnitus and sleep characteristics. Moreover, a subgroup analysis was also carried out to estimate the differences in sex by dividing the participants into male and female groups. A sensitivity analysis was also conducted by excluding ear-related diseases to avoid their confounding effects on tinnitus (n = 102,159).In the cross-sectional analysis, participants with "current tinnitus" (OR: 1.13, 95% CI: 1.04-1.22, p = 0.004) had a higher risk of having a poor overall healthy sleep score and unhealthy sleep behaviors such as short sleep durations (OR: 1.09, 95% CI: 1.04-1.14, p0.001), late chronotypes (OR: 1.09, 95% CI: 1.05-1.13, p0.001), and sleeplessness (OR: 1.16, 95% CI: 1.11-1.22, p0.001) than those participants who "did not have current tinnitus." However, this trend was not obvious between "constant tinnitus" and "transient tinnitus." When considering the severity of tinnitus, the risk of "upsetting tinnitus" was obviously higher if participants had lower overall healthy sleep scores (OR: 1.31, 95% CI: 1.13-1.53, p0.001). Additionally, short sleep duration (OR: 1.22, 95% CI: 1.12-1.33, p0.001), late chronotypes (OR: 1.13, 95% CI: 1.04-1.22, p = 0.003), and sleeplessness (OR: 1.43, 95% CI: 1.29-1.59, p0.001) showed positive correlations with "upsetting tinnitus." In the prospective analysis, sleeplessness presented a consistently significant association with "upsetting tinnitus" (RR: 2.28, p = 0.001). Consistent results were observed in the sex subgroup analysis, where a much more pronounced trend was identified in females compared with the males. The results of the sensitivity analysis were consistent with those of the cross-sectional and prospective analyses.Different types of sleep disturbance may be associated with the occurrence and severity of tinnitus; therefore, precise interventions for different types of sleep disturbance, particularly sleeplessness, may help in the prevention and treatment of tinnitus.
- Published
- 2022
- Full Text
- View/download PDF
13. Glacier mass balance and its impacts on streamflow in a typical inland river basin in the Tianshan Mountains, northwestern China
- Author
-
Jiajia Peng, Zhongqin Li, Liping Xu, Yuqing Ma, Hongliang Li, Weibo Zhao, and Shuang Fan
- Subjects
Management, Monitoring, Policy and Law ,Earth-Surface Processes ,Water Science and Technology - Published
- 2022
- Full Text
- View/download PDF
14. Impact of Allergic Rhinitis and Asthma on COVID-19 Infection, Hospitalization, and Mortality
- Author
-
Zhiye Ying, Yongbo Zheng, Gang Wang, Jianjun Ren, Wendu Pang, Yaxin Luo, Wei Xu, Xiaoxi Zeng, Yu Zhao, Geoffrey Liu, Ke Qiu, Danni Cheng, Yufang Rao, Yao Hu, Deyun Wang, Jiajia Peng, Wei Zhang, Zhiyong Zong, Yijun Dong, and Haopeng Yu
- Subjects
CNS, Corticosteroid nasal sprays ,medicine.medical_specialty ,UKB, UK Biobank ,Coronavirus disease 2019 (COVID-19) ,Long-term medications ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,COPD, Chronic obstructive pulmonary disease ,BMI, Body mass index ,RR, Relative risk ,Virus diseases ,AR, Allergic rhinitis ,Allergic rhinitis ,ACE2, Angiotensin-converting enzyme 2 ,Internal medicine ,medicine ,SD, Standard deviation ,Immunology and Allergy ,Glucocorticoids ,Asthma ,COPD ,CI, Confidence interval ,business.industry ,COVID-19 ,medicine.disease ,Confidence interval ,ICD, International Classification of Diseases ,Relative risk ,Original Article ,COVID-19, Corona virus disease 2019 ,business ,Body mass index - Abstract
BACKGROUND: It remains unclear if patients with allergic rhinitis (AR) and/or asthma are susceptible to corona virus disease 2019 (COVID-19) infection, severity, and mortality. OBJECTIVE: To investigate the role of AR and/or asthma in COVID-19 infection, severity, and mortality, and assess whether long-term AR and/or asthma medications affected the outcomes of COVID-19. METHODS: Demographic and clinical data of 70,557 adult participants completed SARS-CoV-2 testing between March 16 and December 31, 2020, in the UK Biobank were analyzed. The rates of COVID-19 infection, hospitalization, and mortality in relation to pre-existing AR and/or asthma were assessed based on adjusted generalized linear models. We further analyzed the impact of long-term AR and/or asthma medications on the risk of COVID-19 hospitalization and mortality. RESULTS: Patients with AR of all ages had lower positive rates of SARS-CoV-2 tests (relative risk [RR]: 0.75, 95% confidence interval [CI]: 0.69-0.81, P < .001), with lower susceptibility in males (RR: 0.74, 95% CI: 0.65-0.85, P < .001) than females (RR: 0.8, 95% CI: 0.72-0.9, P < .001). However, similar effects of asthma against COVID-19 hospitalization were only major in participants aged
- Published
- 2022
- Full Text
- View/download PDF
15. Rapid design and algorithm implementation for knitted sweater pattern
- Author
-
Jiajia Peng, Lisha Lu, Honglian Cong, Gaoming Jiang, and Fenglin Xia
- Subjects
010407 polymers ,Polymers and Plastics ,Computer science ,Materials Science (miscellaneous) ,Production (economics) ,General Agricultural and Biological Sciences ,01 natural sciences ,Industrial and Manufacturing Engineering ,Manufacturing engineering ,0104 chemical sciences - Abstract
Sweater pattern design plays a crucial role in practical production, determining whether the finished products can meet the requirements of customers. In addition, pattern-designing is also a vital...
- Published
- 2020
- Full Text
- View/download PDF
16. O-doping induced abundant active-sites in MoS2 nanosheets for propelling polysulfide conversion of Li-S batteries
- Author
-
Weiwei Jiang, Yahui Li, Junjie Li, Guoyu Ding, Yijie Zhan, Jiajia Peng, Xiaofei Yan, Xi Deng, Jiawei Tan, Jiawei Xu, Changxin Tang, Yu Dai, and Fugen Sun
- Subjects
Mechanics of Materials ,Mechanical Engineering ,Materials Chemistry ,Metals and Alloys - Published
- 2023
- Full Text
- View/download PDF
17. Experiment and simulation study on cavitation flow in pressure relief valve at different hydraulic oil temperatures
- Author
-
Jie He, Yujia Zhang, Xiumei Liu, Beibei Li, Shenzhen Sun, Jiajia Peng, and Weiwei Liu
- Subjects
Modeling and Simulation ,Electrical and Electronic Engineering ,Instrumentation ,Computer Science Applications - Published
- 2023
- Full Text
- View/download PDF
18. Experimental and Simulational Study on Cavitation Flow in Control Valve at Different Hydraulic Oil Temperatures
- Author
-
Jie He, Yujia Zhang, Xiumei Liu, Beibei Li, Shenzhen Sun, Jiajia Peng, and Weiwei Liu
- Subjects
History ,Polymers and Plastics ,Business and International Management ,Industrial and Manufacturing Engineering - Published
- 2022
- Full Text
- View/download PDF
19. Reconstruction Algorithm of Heterogeneous Network Data Flow in Smart Factory Based on SDN
- Author
-
Yanping Chen, Jiajia Peng, Hong Xia, Zhongmin Wang, Cong Gao, and Fengwei Wang
- Published
- 2022
- Full Text
- View/download PDF
20. The prognostic value of machine learning techniques versus cox regression model for head and neck cancer
- Author
-
Jiajia Peng, Yongmei Lu, Li Chen, Ke Qiu, Fei Chen, Jun Liu, Wei Xu, Wei Zhang, Yu Zhao, Zhonghua Yu, and Jianjun Ren
- Subjects
Irritable Bowel Syndrome ,Machine Learning ,Head and Neck Neoplasms ,Humans ,Prognosis ,Molecular Biology ,General Biochemistry, Genetics and Molecular Biology ,Proportional Hazards Models - Abstract
Accurate prognostic prediction for head and neck cancer (HNC) is important for the improvement of clinical management. We aimed to compare the prognostic value of various machine learning techniques (MLTs) and statistical Cox regression model for different types of HNC.Clinical data of HNC patients were extracted from the Surveillance, Epidemiology, and End Results (SEER) database from 1974 to 2016. The prediction performance of five ML models, including random forest (RF), gradient boosting decision tree (GBDT), support vector machine (SVM), neural network (NN) and deep learning (DL), were compared with the statistical Cox regression model by estimating the concordance index (C-index), integrated Brier score (IBS), time-dependent receiver operating characteristic (ROC) curve and the area under the curve (AUC).Our results showed that the RF model outperformed all other models in prognostic prediction for all tumor sites of HNC, particularly for major salivary gland cancer (MSGC, C-index: 88.730 ± 0.8700, IBS: 7.680 ± 0.4800), oral cavity cancer (OCC, C-index: 84.250 ± 0.6700, IBS: 11.480 ± 0.3300) and oropharyngeal cancer (OPC, C-index: 82.510 ± 0.5400, IBS: 10.120 ± 0.1400). Meanwhile, we analyzed the importance of each clinical variable in the RF model, in which age and tumor size presented the strongest positive prognostic effects. Additionally, similar results can be observed in the internal (6The RF model is a promising prognostic prediction tool for HNC patients, regardless of the anatomic subsites.
- Published
- 2021
21. Review of the distribution and detection methods of heavy metals in the environment
- Author
-
Jiajia Peng, Hao Yuan, Liping Xu, Bo Liu, Dezheng Yang, and Mengting Jin
- Subjects
Atmospheric pressure discharge ,business.industry ,General Chemical Engineering ,010401 analytical chemistry ,General Engineering ,Heavy metals ,010501 environmental sciences ,Mass spectrometry ,01 natural sciences ,Atomic fluorescence spectrometry ,0104 chemical sciences ,Analytical Chemistry ,law.invention ,Human health ,law ,Environmental science ,Atomic absorption spectroscopy ,Process engineering ,business ,Inductively coupled plasma mass spectrometry ,0105 earth and related environmental sciences ,Atomic emission spectrometry - Abstract
Heavy metals can be enriched in living organisms and seriously endanger human health and the ecological environment, which has evolved into a significant global environmental problem. Based on summarizing the spatial distribution of heavy metals in the environment, this review introduces heavy metal detection technologies such as inductively coupled plasma mass spectrometry/atomic emission spectrometry, atomic absorption spectrometry, atomic fluorescence spectrometry, and laser-induced breakdown spectrometry. It summarizes their respective advantages, characteristics, and applicability. Besides, atmospheric pressure discharge plasma as a potential heavy metal detection technology is also introduced and discussed in this review. The current research mainly focuses on improving the analytical performance and optimizing the practical application. Furthermore, this review not only summarizes the advantages of atmospheric pressure discharge plasma in the field of element analysis but also summarizes the principal scientific and technical problems to be solved urgently.
- Published
- 2020
- Full Text
- View/download PDF
22. Deformation and geometric modeling in three-dimensional simulation of fancy weft-knitted fabric
- Author
-
Fenglin Xia, Gaoming Jiang, Jiajia Peng, Zhijia Dong, and Honglian Cong
- Subjects
Particle system ,010407 polymers ,Materials science ,Polymers and Plastics ,Geometry ,02 engineering and technology ,Yarn ,Deformation (meteorology) ,021001 nanoscience & nanotechnology ,01 natural sciences ,Texture (geology) ,0104 chemical sciences ,Three dimensional simulation ,visual_art ,visual_art.visual_art_medium ,Chemical Engineering (miscellaneous) ,Loop modeling ,0210 nano-technology ,Geometric modeling ,Texture mapping - Abstract
To realize three-dimensional (3-D) simulation of weft-knitted fabrics, this paper proposes a 3-D loop modeling method which includes yarn texture and rapid deformation of fabric. The deformation of the fabric is achieved using a simplified particle system. In this study, the shape of the loop is controlled by using 10 control points, and the coordinates of the loop type control points are calculated in combination with the actual loop shape and a quadratic Bezier curve equation. To realize the deformation of the loop, the relationship between the control points and the particle system is established. The 3-D surface model of the yarn is constructed based on a local frame of the loop path. In addition, the yarn simulation is achieved by texture mapping. The simulation of fancy weft-knitted fabric is realized by the joint programming of Visual Studio and OpenGL. The results show that the simplified particle model can accurately achieve the deformation of the fabric with high efficiency. The geometric model properly represents the loop shape and exhibits the yarn texture.
- Published
- 2019
- Full Text
- View/download PDF
23. Clinicopathological features and prognostic analysis of 49 cases with crescentic glomerulonephritis
- Author
-
Jiajia Peng, Jiaxi Pu, Xiang Ao, Qiaoling Zhou, Ting Meng, Jinbiao Chen, Ping Xiao, Xiangcheng Xiao, Qianqian Liu, Ting Wu, Zhangzhe Peng, Weisheng Peng, Xiaozhao Li, Hongling Yin, Yong Zhong, and Wei Lin
- Subjects
0301 basic medicine ,Cancer Research ,medicine.medical_specialty ,treatment and prognosis ,Gastroenterology ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Immunology and Microbiology (miscellaneous) ,Internal medicine ,medicine ,Rapidly progressive glomerulonephritis ,Kidney ,Creatinine ,Clinical pathology ,business.industry ,urogenital system ,Autoantibody ,Acute kidney injury ,Glomerulonephritis ,General Medicine ,Articles ,medicine.disease ,030104 developmental biology ,medicine.anatomical_structure ,crescentic glomerulonephritis ,chemistry ,030220 oncology & carcinogenesis ,clinical pathology ,business ,Kidney disease - Abstract
Rapidly progressive glomerulonephritis (RPGN), characterized by rapid kidney dysfunction caused by aggressive glomerulonephritis, is usually associated with crescentic glomerulonephritis (CrGN). In the present study, the data from patients with CrGN were retrospectively analyzed at a tertiary medical center in China with the aim of investigating the clinicopathological features and the association of the type of CrGN with the prognosis. The renal biopsies of 49 patients diagnosed with CrGN were obtained between December 2011 and July 2016. Of the 49 patients, 11 patients (22.45%) had type I CrGN, 19 (38.78%) had type II CrGN and 19 (38.78%) had type III CrGN. The majority of CrGN patients exhibited multiple-system involvement and 28 patients (57.14%) had kidney enlargement. Proportions of patients with acute kidney injury (AKI), acute kidney diseases without AKI, and chronic kidney disease were 28.57, 46.94 and 24.49%, respectively. Among the 3 types of CrGN, patients with type I CrGN tended to have a higher proportion of AKI with more cellular crescent formation, and higher serum creatinine and retinol binding protein. Circulating anti-GBM antibodies were present in all type I CrGN patients and anti-neutrophilic cytoplasmic autoantibodies were detected in 84.21% of patients with type III CrGN. Type III CrGN patients had a superior kidney survival, whereas type I CrGN patients had the worst kidney prognosis (P
- Published
- 2019
24. Study on Change of the Glacier Mass Balance and Its Response to Extreme Climate of Urumqi Glacier No.1 in Tianshan Mountains in Recent 41 Years
- Author
-
Jiajia Peng, Liping Xu, Zhongqin Li, Puchen Chen, Yutian Luo, and Cui Cao
- Subjects
glacier mass balance ,extreme climate indices ,climate change ,correlation ,Urumqi Glacier No.1 ,Geography, Planning and Development ,Aquatic Science ,Biochemistry ,Water Science and Technology - Abstract
Glaciers are susceptible indicators of climate change and crucial parts of the world’s water cycle. In the context of global warming, we took the Urumqi Glacier No.1 (UG1) as an example, which is situated at the source of the Urumqi River on the northern slope of the Tianshan Mountains, Xinjiang, combined with the climate data of Daxigou Meteorological Station from 1980 to 2020, and the change of glacier mass balance and its response to extreme climate are discussed. The results suggest that the glacier mass balance of UG1 showed a downward trend over the studied 41-year period, and the mass loss increased. The cumulative glacier mass balance value was −19,776 mm w.e., and the average annual value was −482 mm w.e.a−1. The Mann-Kendall trend test showed that the change point occurred around 1994, and the mass balance of UG1 became more negative after 1994. In the same period, the changing mass balance trend of UG1 was not the same in different seasons. The inter-annual variation of summer mass balance was drastic, showing a marked downward trend; the inter-annual change of winter mass balance was small, showing a slight uptrend. The changing of extreme climate indices where UG1 is located showed that only TX90p and TX10p changed observably from 1980 to 2020, and the extreme precipitation indices changed evidently and had been on the rise. The changing trend of extreme climate indices indicated that the temperature was rising, the warming was significant, and the precipitation was increasing. During 1980–2020, the glacier mass balance was substantially correlated with the extreme temperature indices (TX90p, TXx) but not with the extreme precipitation indices. Analyzing on a seasonal scale, the summer mass balance was memorably correlated with the extreme temperature indices (TX90p, TX10p, TXx), and the correlation coefficient between winter mass balance and the extreme precipitation index R95p and winter precipitation was in the range 0.36~0.40 (p < 0.05). According to the correlation between glacier mass balance and extreme climate indices, the summer mass balance was mainly affected by temperature, and the winter mass balance was affected primarily by precipitation.
- Published
- 2022
- Full Text
- View/download PDF
25. Prediction Model of Oxygen-Enrichment-Related Gas Utilization Rate Based on Multiple Time Scales
- Author
-
Jiajia Peng, Jianqi An, Xin Chen, and Min Wu
- Subjects
Oxygen enrichment ,Multiple time ,Environmental science ,Soil science ,Utilization rate - Published
- 2021
- Full Text
- View/download PDF
26. Hydrodynamic characteristics and optimization design of a bio-inspired anti-erosion structure for a regulating valve core
- Author
-
Yujia Zhang, Xiumei Liu, Beibei Li, Shenzhen Sun, Jiajia Peng, Weiwei Liu, Jie He, and Wei Li
- Subjects
Modeling and Simulation ,Electrical and Electronic Engineering ,Instrumentation ,Computer Science Applications - Published
- 2022
- Full Text
- View/download PDF
27. Rapid Parametric Human Modeling in 3D Garment Simulation
- Author
-
Honglian Cong, Jiajia Peng, and Gaoming Jiang
- Subjects
010407 polymers ,Computer science ,characteristic sizes ,Chemical technology ,parametric deformation ,General Materials Science ,Control engineering ,TP1-1185 ,human model ,01 natural sciences ,0104 chemical sciences ,Parametric statistics - Abstract
To realize 3D garment simulation online and show the wearing effect of different body types, a method for rapid parametric human modeling is proposed in this article. The parameterization consists of two phases. In the first phase, the characteristic parameters of the sample model are extracted according to the different types of feature information. In the second phase, the deformation is realized by combining the axial deformation method and the radial weight. Thus, according to contrasts between the input measurement and the sample sizes, parametric human modeling is realized by deformation of the sample model. In the deformation stage, the axis curve is simplified to the straight-line segment in the axis deformation method, reducing the calculation. Comparative analysis and the results of experiments demonstrate that the better performance can be achieved at a higher speed, and this method realizes real-time parametric human modeling.
- Published
- 2019
- Full Text
- View/download PDF
28. Development of whole garment formed on four-bed computerized flat knitting machine
- Author
-
Yan Zhao, Xuan Luo, Gaoming Jiang, Honglian Cong, and Jiajia Peng
- Subjects
010407 polymers ,Evaluation system ,Polymers and Plastics ,040301 veterinary sciences ,business.industry ,Computer science ,Materials Science (miscellaneous) ,Process (computing) ,04 agricultural and veterinary sciences ,Yarn ,Production efficiency ,Clothing ,01 natural sciences ,General Business, Management and Accounting ,Manufacturing engineering ,0104 chemical sciences ,0403 veterinary science ,Development (topology) ,visual_art ,visual_art.visual_art_medium ,Business, Management and Accounting (miscellaneous) ,Production (economics) ,business ,Labor cost - Abstract
Purpose The whole garment technology offers a solution for the production efficiency by directly knitting a seamless tubular garment. Due to its complexity, high requirements and few references, the technology has not been widely applied in mass production. Therefore, the purpose of this paper is to show garment technology’s detailed design method, the technique calculation process and its merits compared than common technology. Design/methodology/approach This paper first analyzes the knitting principle of the four-bed computerized flat knitting machine from its configuration. After that, the design method is putted forward as well as the technique calculation process. To reveal the advantages of the whole garment technology, this paper builds a comprehensive evaluation system by comparing the knitting time, labor cost and the yarn consumption. Findings With the evaluation system, the whole garment technology is proved to be more productive, cost-saving and less materials-consuming. Moreover, this advantage stands more out when the machine gage is higher. Research limitations/implications Due to limited research time and references, this paper only presents the whole garment technology for knitting common and traditional styles. More complicated and fashioned garments can be studied in the future research. Practical implications The design method and technology presented in this paper can be used as a reference for both the designers in the manufacture industry and the scholars for academic research works. Originality/value This paper has presented the whole garment technology and a specific method for technique calculation with consideration of garment structures. It also builds a evaluation system to show the advantages in terms of knitting efficiency, labor cost and yarn consumption.
- Published
- 2018
- Full Text
- View/download PDF
29. Increased plasma osteopontin levels are associated with nonalcoholic fatty liver disease in patients with type 2 diabetes mellitus
- Author
-
Gangyi Yang, Cong Wang, Dongfang Liu, Lili Zhang, Min Long, Miao He, Wenwen Chen, Shengbing Li, and Jiajia Peng
- Subjects
Blood Glucose ,Male ,0301 basic medicine ,endocrine system diseases ,Neutrophils ,Blood Pressure ,Overweight ,Biochemistry ,Gastroenterology ,Body Mass Index ,0302 clinical medicine ,Non-alcoholic Fatty Liver Disease ,Risk Factors ,Nonalcoholic fatty liver disease ,Leukocytes ,Immunology and Allergy ,Osteopontin ,Correlation of Data ,biology ,Hematology ,Middle Aged ,Quartile ,030220 oncology & carcinogenesis ,Female ,medicine.symptom ,Adult ,medicine.medical_specialty ,Immunology ,03 medical and health sciences ,stomatognathic system ,Internal medicine ,medicine ,Humans ,In patient ,Obesity ,Molecular Biology ,Triglycerides ,Glycated Hemoglobin ,business.industry ,Albumin ,nutritional and metabolic diseases ,Type 2 Diabetes Mellitus ,medicine.disease ,digestive system diseases ,Uric Acid ,030104 developmental biology ,Diabetes Mellitus, Type 2 ,ROC Curve ,Relative risk ,biology.protein ,business ,Biomarkers - Abstract
Nonalcoholic fatty liver disease (NAFLD) commonly occurs in patients with type 2 diabetes mellitus (T2DM). Osteopontin (OPN) is a multifunctional protein with pleiotropic physiological functions. This study aimed to investigate the interrelation between circulating OPN and NAFLD in T2DM patients. Overall, 249 subjects were classified into 4 groups: 53 patients with NAFLD and T2DM; 57 with newly diagnosed T2DM; 59 with NAFLD; and 80 healthy age- and sex-matched controls. Serum OPN was measured by ELISA. The OPN distribution in the pooled data was divided into quartiles; significant trends across increasing quartiles were estimated by the Cochran-Armitage trend test. Compared with the controls, circulating OPN concentrations were significantly elevated in NAFLD patients and T2DM patients with or without NAFLD. Serum OPN levels were higher in the overweight/obese group than that in the lean group. Circulating OPN levels were positively correlated with CRP, age, BMI, SBP, DBP, HbA1c, UA, TGs, WBCs, neutrophils, FBG, and HOMA-IR and negatively correlated with ADP, albumin and HDL. Age, albumin, HbA1c, HDL and hsCRP were independently related to circulating OPN. The relative risks for NAFLD, T2DM and T2DM with NAFLD increased significantly along with increasing OPN quartiles based on the Cochran-Armitage trend test. OPN is an optimal predictor in the diagnosis of T2DM with NAFLD and T2DM and may contribute to the aggravation of the metabolic state.
- Published
- 2020
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.