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创赛视角下中国种业人才培养模式探索与实践——以“登海杯”全国大学生种艺竞赛为例

农业技术与装备 2022年第8期 131-133页

作者：江绪文孙群李贺勤杨今胜颜理想李登海王建华青岛农业大学山东青岛266109 中国农业大学北京100193 山东登海种业股份有限公司山东莱州261417

在“双创教育”“双一流”“新种科”等建设背景下,教育部高等学校种子科学与工程专业教指委协同中国作物学会作物种子专业委员会联合多家单位首建“全国大学生种艺竞赛”,为中国种业振兴创新创业人才培养提供了重要平台。文章回顾中国... 详细信息

在“双创教育”“双一流”“新种科”等建设背景下,教育部高等学校种子科学与工程专业教指委协同中国作物学会作物种子专业委员会联合多家单位首建“全国大学生种艺竞赛”,为中国种业振兴创新创业人才培养提供了重要平台。文章回顾中国种业人才培养史,以“登海杯”全国大学生种艺竞赛为例,从创赛视角探索实践人才培养新模式,为现代种业高质量发展提供人才智力支撑。

关键词：种业大学生竞赛种子科学与工程

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Optimal Clearing Model of Centralized Market Considering Path Constraints 1

Optimal Clearing Model of Centralized Market Considering Pat...

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International Symposium on Energy Environment and Green Development (EEGD)

作者： Zheng, Zhao Chen, Kening jiang, Yu Liu, xuwen State Grid Energy Res Inst Beijing Peoples R China State Grid JiangSu Elect Power Co Ltd Nanjing Jiangsu Peoples R China

China's electricity market is now still in the mode of "Unified market and two-tier operation" including provincial and inter-provincial market. The inter-provincial market is divided into the medium and long-term market and spot market. This study takes the inter provincial spot market as the research object, and proposes a unified optimization clearing algorithm for inter provincial spot market considering path constraints. The proposed method is able to handle AC-DC hybrid electricity network, and sort and determine the trading pairs using power flow tracing algorithm. The power market software PLEXOS and practical market data are used to simulate the proposed model, and the results show the accuracy and effectiveness.

关键词： Power markets

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Impact of dissolved oxygen on the microbial community structure of an intermittent biological aerated filter (IBAF) and the removal efficiency of gasification wastewater

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BIORESOURCE TECHNOLOGY 2018年 255卷 198-204页

作者： Zhang, Qi Wang, Chunrong jiang, Longxin Qi, Ji Wang, Jianbing He, xuwen China Univ Min & Technol Beijing Sch Chem & Environm Engn Beijing 100083 Peoples R China

A novel IBAF system (altered conventional biological aerated filter (BAF) for intermittent aeration) was used to treat BDD anodes electrochemical oxidation gasification wastewater effluent, after which 454 pyrosequencing was applied to investigate the bacterial community of IBAF and demonstrate the relationship between dissolved oxygen (DO) and the bacterial community. The results showed that the concentration of COD, NH4+-N and NO3--N reached 55.08, 7.64 and 7.76 mg/L, respectively, in IBAF effluent because of changes in the DO concentration at 30 days after system start-up. The bacterial community results revealed that the 40 cm sample had the highest bacterial diversity. The bacterial species were approximate in total samples at phylum and family level, but the relative abundance was significantly different because of change in DO concentration. In addition, sample distance analysis indicated that the similarity of different samples was related to the DO concentration at different heights.

关键词： Intermittent biological aerated filter (IBAF) Dissolved oxygen (DO) Bacterial community

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Preliminary studies on the molecular mechanism of intramuscular fat deposition in the longest dorsal muscle of sheep

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BMC GENOMICS 2024年第1期25卷 592页

作者： Shao, xuwen Lu, Xintan Sun, Xinming jiang, Huaizhi Chen, Yang Jilin Agr Univ Coll Anim Sci & Technol Changchun 130118 Peoples R China Minist Agr & Rural Affairs Key Lab Livestock & Poultry Resources Sheep & Goat Changchun Peoples R China

Background Intramuscular fat content is an important index reflecting the quality of mutton, which directly affects the flavor and tenderness of mutton. Livestock and poultry intramuscular fat content is influenced by genetics, nutritional level, and environmental factors. Key regulatory factors play a crucial role in intramuscular fat deposition. However, there is a limited amount of research on the identification and function of key genes involved in intramuscular fat content deposition specifically in sheep. Results Histological differences in the longest dorsal muscle of the small-tailed frigid sheep increased in diameter and decreased in several muscle fibers with increasing monthly age;The intramuscular fat content of the longest dorsal muscle of the small-tailed cold sheep varied with age, with a minimum of 1 month of age, a maximum of 6 months of age, and a minimum of 12 months of age. Transcriptomic sequencing and bioinformatics analysis revealed a large number of differential genes in the longest dorsal muscles of little-tailed billy goats of different months of age, which were enriched in multiple GO entries and KEGG pathways. Among them, the pathway associated with intramuscular fat was the AMPK signaling pathway, and the related genes were PPARGC1A and ADIPOQ;Immunohistochemical studies showed that PPARGC1A and ADIPOQ proteins were expressed in connective tissues, cell membranes, and, to a lesser extent, the cytoplasm of the longest dorsal muscle of the little-tailed frigid sheep;Real-time PCR and Western Blot validation showed that PPARGC1A and ADIPOQ were both expressed in the longest dorsal muscle of the little-tailed frigid sheep at different ages, and there were age differences in the amount of expression. The ADIPOQ gene was negatively correlated with the intramuscular fat content of the longest dorsal muscle, and the PPARGC1A gene was positively correlated with the intramuscular fat content of the longest dorsal muscle;As inferred from the above

关键词： Small-tailed frigid sheep Longest dorsal muscle Intramuscular fat Growth and development Transcriptomics

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Recent advances in the synthesis of biodegradable polyesters by sustainable polymerization: lipase-catalyzed polymerization

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RSC ADVANCES 2020年第59期10卷 36230-36240页

作者： Liu, Ying Song, Lijie Feng, Na jiang, Wei Jin, Yongri Li, xuwen Jilin Univ Coll Chem 2699 Qianjin Rd Changchun 130012 Jilin Peoples R China Jilin Prov Acad Tradit Chinese Med Clin Hosp 1 Changchun 130021 Peoples R China Zhengzhou Univ Acad Med Sci Dept Mol Pathol Applicat Ctr Precis MedAffiliated Hosp 2 Zhengzhou 450052 Henan Peoples R China

Over the past three decades, enzymatic polymerization has dramatically developed and gradually broadened as a creative methodology in the construction of polymeric materials with tailor-made structures and properties. Compared with transition metal catalyst polymerizations, enzymatic polymerization is more attractive in the biomedicine field due to the metal-free residue, good biocompatibility, and few by-products. Meanwhile, enzymatic polymerization has far more activity towards macrolides. In this review, the synthesis of lipase-catalyzed polymer materials is systematically summarized, focusing on the synthesis of the complex and well-defined polymers. The enzymatic polyester synthesis was then discussed concerning the different reaction types, including ring-opening polymerization, polycondensation, a combination of ring-opening polymerization with polycondensation, and chemoenzymatic polymerization. Besides, exploration of novel biocatalysts and reaction media was also described, with particular emphasis on the enzymes obtainedviaimmobilization or protein engineering strategies, green solvents, and reactors. Finally, recent developments in catalytic kinetics and mechanistic studies through the use of spectroscopy, mathematics, and computer techniques have been introduced. Besides, we addressed the remaining central issues in enzymatic polymerization and discussed current studies aimed at providing answers.

关键词： Ring opening polymerization

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The role of apparent diffusion coefficient in the grading of adult isocitrate dehydrogenase-mutant astrocytomas: relationship with the Ki-67 proliferation index

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ACTA RADIOLOGICA 2024年第5期65卷 489-498页

作者： She, Yingxia Liu, Xianwang jiang, Jian Wang, xuwen Niu, Qian Zhou, Junlin Lanzhou Univ Second Hosp Radiol Dept Lanzhou Peoples R China Lanzhou Univ Second Hosp Key Lab Med Imaging Gansu Prov Lanzhou Peoples R China Lanzhou Univ Second Hosp Gansu Int Sci & Technol Cooperat Base Med Imaging Lanzhou Peoples R China Lanzhou Univ Second Hosp Pathol Dept Lanzhou Peoples R China Lanzhou Univ Second Hosp Dept Radiol Cuiyingmen 82 Lanzhou 730030 Peoples R China

Background: The grading of adult isocitrate dehydrogenase (IDH)-mutant astrocytomas is a crucial prognostic factor. Purpose: To investigate the value of conventional magnetic resonance imaging (MRI) features and apparent diffusion coefficient (ADC) in the grading of adult IDH-mutant astrocytomas, and to analyze the correlation between ADC and the Ki-67 proliferation index. Material and Methods: The clinical and MRI data of 82 patients with adult IDH-mutant astrocytoma who underwent surgical resection and molecular genetic testing with IDH and 1p/19q were retrospectively analyzed. The conventional MRI features, ADC(min), ADC(mean), and nADC of the tumors were compared using the Kruskal-Wallis single factor ANOVA and chi-square tests. Receiver operating characteristic (ROC) curves were drawn to evaluate conventional MRI and ADC accuracy in differentiating tumor grades. Pearson correlation analysis was performed to determine the correlation between ADC and the Ki-67 proliferation index. Results: The difference in enhancement, ADC(min), ADC(mean), and nADC among WHO grade 2, 3, and 4 tumors was statistically significant (all P <0.05). ADC(min) showed the preferable diagnostic accuracy for grading WHO grade 2 and 3 tumors (AUC=0.724, sensitivity=63.4%, specificity=80%, positive predictive value (PPV)=62.0%;negative predictive value (NPV)=82.5%), and distinguishing grade 3 from grade 4 tumors (AUC=0.764, sensitivity=70%, specificity=76.2%, PPV=75.0%, NPV=71.4%). Enhancement + ADC model showed an optimal predictive accuracy (grade 2 vs. 3: AUC = 0.759;grade 3 vs. 4: AUC = 0.799). The Ki-67 proliferation index was negatively correlated with ADC(min), ADC(mean), and nADC (all P <0.05), and positively correlated with tumor grade. Conclusion: Conventional MRI features and ADC are valuable to predict pathological grading of adult IDH-mutant astrocytomas.

关键词： Apparent diffusion coefficient astrocytomas isocitrate dehydrogenase-mutant Ki-67 proliferation index

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Anomaly Detection for Multivariate Time Series Based on Contrastive Learning and Autoformer 27

Anomaly Detection for Multivariate Time Series Based on Cont...

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27th International Conference on Computer Supported Cooperative Work in Design (CSCWD)

作者： Shang, xuwen Zhang, Jue jiang, Xingguo Luo, Hong Beijing Univ Posts & Telecommun Beijing Key Lab Intelligent Telecommun Software & Beijing Peoples R China Beihang Univ Dept Comp Sci & Engn Beijing Peoples R China

ISBN: (纸本)9798350349184;9798350349191

Nowadays, due to the increasingly complex and huge data flow, anomaly detection has become an important technology to ensure the high security and reliability of the systems. It helps identify unusual observations in the data, thereby protecting safety and reducing risk. However, in the field of multivariate temporal anomaly detection, there are still some difficulties in spatio-temporal correlation mining of variables, generalization ability in dealing with complex temporal sequences, and feature learning under different granularity. Therefore, we propose an unsupervised anomaly detection method for multivariate time series based on contrastive learning and Autoformer autoencoder. In order to fully explore the spatio-temporal correlation of time series data, this paper uses Graph Attention Network and Auto-Correlation to jointly learn spatio-temporal correlation, and obtain positive and negative pairs through time-domain and frequency-domain data augmentation. Finally, the Autoformer autoencoder is used for anomaly detection in a predictive manner. In the loss function section, a joint loss function is formed by introducing contrastive learning losses at the time step and time window granularity, combined with prediction loss, to improve the learning effect. This paper investigates the performance of the proposed method through experiments on the SMAP and MSL public datasets, and achieves better results than baseline methods.

关键词： anomaly detection multivariate time series contrastive learning autoformer spatio-temporal correlation

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Pilot-scale catalytic ozonation pretreatment for improving the biodegradability of fixed-bed coal gasification wastewater

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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 2021年 148卷 13-19页

作者： Chen, Xiaoya Wang, Chunrong jiang, Longxin Li, Haiyan Wang, Jianbing He, xuwen China Univ Min & Technol Beijing Sch Chem & Environm Engn Beijing 100083 Peoples R China

Achieving zero liquid dischargeis a requirement for the development of the coal chemical industry;high pollutant concentration, strong biotoxicity, and poor biodegradability (BOD5/COD=0.1-0.2) make fixed-bed coal gasification wastewater difficult to treat. This study synthesized a Fe-Mn/lava catalyst (FMLC) and performed a pilot-scale test on catalytic ozonation for the pretreatment of fixed-bed coal gasification wastewater. The effects of ozone and catalyst dosages were investigated, and the changes in the organics, biotoxicity, and biodegradability of wastewater were analyzed using three-dimensional fluorescence spectroscopy, BOD5/COD, and specific oxygen uptake rate (SOUR). Energy consumption was also calculated. The removal efficiencies (at a flow rate of 1.0 m(3)/h, ozone dosage of 179 g/h, and catalyst dosage of 40 kg/m(3)) of COD and BOD5 were 61.77% and 16.98%, respectively, after 30 days of continuous operation. Toxic refractory macromolecular organic pollutants were transformed into small, biodegradable substances. BOD5/COD increased from 0.16 to 0.35, and SOUR decreased from 2.8460 to 2.3180 mgO(2)/(gMLSS.h). The operating cost was 1.24 kWh/kg COD. Catalytic ozonation as a pretreatment technology markedly improved biodegradability, reduced biotoxicity, and looks to be promising for treating fixed-bed coal gasification wastewater. (C) 2020 Published by Elsevier B.V. on behalf of Institution of Chemical Engineers.

关键词： Fixed-bed coal gasification wastewater Pilot-scale Catalytic ozonation Fe-Mn/lava catalyst Pretreatment Biodegradability

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HPV vaccination strategy for 14-year-old females and economic returns for cervical cancer prevention in Wuxi City, China: a cost effectiveness analysis

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COST EFFECTIVENESS AND RESOURCE ALLOCATION 2024年第1期22卷 1页

作者： jiang, Jingfeng Zhao, Fanqi Hong, Xiang Wang, xuwen Nanjing Med Univ Wuxi Ctr Dis Control & Prevent Affiliated Wuxi Ctr Dis Control & Prevent Wuxi 214023 Peoples R China Southeast Univ Minist Educ Sch Publ Hlth Dept Epidemiol & Hlth StatKey Lab Environm Med & Nanjing Peoples R China

Background Since December 2021, Wuxi, China has offered a two-dose human papillomavirus (HPV) vaccination to 14-year-old females for free. This study evaluated the costs and benefits of this vaccination scheduled in the Expanded Program on Immunization in Wuxi from the perspective of the cities' demographic characteristics, economic development, and policy support. Methods The model-based economic evaluation used TreeAge Pro software to construct a decision tree-Markov model for the vaccination strategy in which 100,000 14-year-old females received two doses of bivalent HPV vaccine or no vaccination. Costs and effects of the strategy were assessed from a societal perspective through literature research and data obtained from the Wuxi Centre for Disease Control and Prevention. Univariate, multivariate, and probabilistic sensitivity analyses assessed the stability of the findings. Results The cost of the bivalent HPV vaccine in Wuxi is 711.3 CNY. The two-dose of bivalent HPV vaccine for 100,000 14-year-old females would cost an additional 658,016 CNY compared to no vaccination, but would result in 1,960 Quality Adjustment Years of Life (QALYs). Using the per capita gross domestic product of 187,415 CNY in 2021 in Wuxi as the willingness-to-pay threshold, the vaccination strategy costs 3,357.37 CNY per QALY gained, which is much lower than the threshold, suggesting that it is a very cost-effective strategy. In addition, the vaccine strategy reduced the incidence of cervical cancer by 300 cases and cervical cancer deaths by 181 cases, representing a benefit-cost ratio of 2.86 (> 1) when health output outcomes were measured in monetary terms. These results suggested that the vaccination strategy was advantageous. Sensitivity analyses showed that changes in the parameters did not affect the conclusions and that the findings were robust. Conclusions Compared to no vaccination, the delivery of two doses of bivalent HPV vaccine for 14-year-old females was a more highly cost-

关键词： Cost-effectiveness HPV Cervical cancer Vaccination

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On-Orbit Geometric Calibration and Validation of Optical-1 HR 19

On-Orbit Geometric Calibration and Validation of Optical-1 H...

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19th National Symposium on Remote Sensing of China - Remote Sensing of the Environment

作者： jiang Yonghua Zhang Guo Huang Wenchao Qin xuwen Wuhan Univ Sch Remote Sensing & Informat Engn Wuhan 430079 Peoples R China Wuhan Univ State Key Lab Informat Engn Surveying Mapping & R Wuhan 430079 Peoples R China State Bur Surveying & Mapping Satellite Surveying & Mapping Applicat Ctr Beijing 100083 Peoples R China China Geol Survey Beijing 10037 Peoples R China

ISBN: (纸本)9781628418910

Owing to relatively simplistic domestic hardware technology and a lack of on-orbit geometric calibration, particularly interior calibration, the positioning accuracies of Optical-1 HR satellites can vary greatly depending on the presence of ground control points (GCPs). Without GCPs, accuracies are typically lower than 100 pixels, whereas when GCPs are plentiful, accuracy is higher than one pixel, demonstrating the potential for a large discrepancy between international optical satellites with the same image resolution. This study investigated a new method of geometric calibration for Optical-1 HR satellites. Experiments were conducted to demonstrate the positive effects on positioning accuracy achieved by the calibration method. After calibration by our method, a positioning accuracy of higher than one pixel was obtained with only a small number of GCPs, which is equivalent to the accuracy of advanced international optical satellites with the same image resolution.

关键词： Optical-1 HR geometric calibration offset matrix look angle image stitching

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