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Ab Initio Design of Ni-Rich Cathode Material with Assistance of Machine Learning for High Energy Lithium-Ion Batteries

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Energy & Environmental Materials 2024年第6期7卷 74-83页

作者： Xinyu Zhang Daobin Mu Shijie Lu Yuanxing Zhang yuxiang Zhang Zhuolin Yang Zhikun Zhao Borong Wu Feng Wu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081 China

With the widespread use of lithium-ion batteries in electric vehicles,energy storage,and mobile terminals,there is an urgent need to develop cathode materials with specific ***,existing material control synthesis routes based on repetitive experiments are often costly and inefficient,which is unsuitable for the broader application of novel *** development of machine learning and its combination with materials design offers a potential pathway for optimizing ***,we present a design synthesis paradigm for developing high energy Ni-rich cathodes with thermal/kinetic simulation and propose a coupled image-morphology machine learning *** paradigm can accurately predict the reaction conditions required for synthesizing cathode precursors with specific morphologies,helping to shorten the experimental duration and *** the model-guided design synthesis,cathode materials with different morphological characteristics can be obtained,and the best shows a high discharge capacity of 206 mAh g^(−1)at 0.1C and 83%capacity retention after 200 *** work provides guidance for designing cathode materials for lithium-ion batteries,which may point the way to a fast and cost-effective direction for controlling the morphology of all types of particles.

关键词： design digital image lithium-ion batteries machine learning NCM cathode

OsEIL1 and OsEIL2,two master regulators of rice ethylene signaling,promote the expression of ROS scavenging genes to facilitate coleoptile elongation and seedling emergence from soil

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Plant Communications 2024年第3期5卷 93-105页

作者： Jinzhu Qiao Ruidang Quan Juan Wang yuxiang Li Dinglin Xiao Zihan Zhao Rongfeng Huang Hua Qin Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081China National Key Facility of Crop Gene Resources and Genetic Improvement Beijing 100081China

Successful emergence from the soil is a prerequisite for survival of germinating seeds in their natural *** rice,coleoptile elongation facilitates seedling emergence and establishment,and ethylene plays an important role in this ***,the underlying regulatory mechanism remains largely ***,we report that ethylene promotes cell elongation and inhibits cell expansion in rice coleoptiles,result-ing in longer and thinner coleoptiles that facilitate seedlings emergence from the *** analysis showed that genes related to reactive oxygen species(ROS)generation are upregulated and genes involved in ROS scavenging are downregulated in the coleoptiles of ethylene-signaling *** investiga-tions showed that soil coverage promotes accumulation of ETHYLENE INSENSITIVE 3-LIKE 1(OsEIL1)and OsEIL2 in the upper region of the coleoptile,and both OsEIL1 and OsEIL2 can bind directly to the promoters of the GDP-mannose pyrophosphorylase(VTC1)gene OsVTC1-3 and the peroxidase(PRX)genes OsPRX37,OsPRX81,OsPRX82,and OsPRX88 to activate their *** leads to increased ascorbic acid content,greater peroxidase activity,and decreased ROS accumulation in the upper region of the *** of ROS accumulation promotes coleoptile growth and seedling emergence from *** deepen our understanding of the roles of ethylene and ROS in controlling coleoptile growth,and this information can be used by breeders to produce rice varieties suitable for direct seeding.

关键词： ethylene ROS coleoptile growth emergence rate rice

南瓜籽及其加工副产品在动物生产中应用的潜在价值

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动物营养学报 2022年第7期34卷 4174-4181页

作者：李斐王甜梅宁安周玉香宁夏大学农学院银川750021 宁夏农林科学院畜牧兽医研究所银川750002

南瓜籽营养丰富,具有多种营养活性。现阶段对于南瓜籽的研究主要集中在人体保健方面,在动物生产中的应用研究极少。本文综述了南瓜籽的营养特性、药理活性和南瓜籽产品的开发应用,旨在为南瓜籽在动物生产中的应用提供理论参考,为南瓜籽... 详细信息

南瓜籽营养丰富,具有多种营养活性。现阶段对于南瓜籽的研究主要集中在人体保健方面,在动物生产中的应用研究极少。本文综述了南瓜籽的营养特性、药理活性和南瓜籽产品的开发应用,旨在为南瓜籽在动物生产中的应用提供理论参考,为南瓜籽的深度加工利用提供新思路。

关键词：南瓜籽营养特性药理作用应用

Realtime observation of “spring fracture” like AlGaN/GaN HEMT failure under bias

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Science China(Information Sciences) 2024年第1期67卷 303-305页

作者： Qing ZHU Zhenni WANG yuxiang WEI Ling YANG Xiaoli LU Jiejie ZHU Peng ZHONG Yimin LEI Xiaohua MA School of Microelectronics Xidian University State Key Discipline Laboratory of Wide Bandgap Semiconductor Technology Xidian University School of Advanced Materials and Nanotechnology Xidian University

The AlGaN/GaN HEMTs have been considered promising candidates for high-frequency and high-power applications,while the reliability issues greatly limit the commercialization of AlGaN/GaN HEMTs. In the past, the research on the reliability of devices was often based on Raman spectroscopy, cathodoluminescence, and TEM after failure of the devices, which is often considered to be the laborious and complicated “archaeological” kind of analysis [1].

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复合化学处理稻草饲粮中添加过瘤胃蛋氨酸对舍饲滩羊生长性能、屠宰性能和肉品质的影响

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动物营养学报 2019年第2期31卷 962-969页

作者：张艳梅周玉香李雨蔚宁夏大学农学院银川750021 宁夏农垦贺兰山奶业有限公司银川750200

本试验将饲粮精粗比设为30∶70,并将苜蓿与复合化学处理稻草以40∶60组合作为粗饲料,研究复合化学处理稻草饲粮中添加过瘤胃蛋氨酸对舍饲滩羊生长性能、屠宰性能和肉品质的影响。选取4月龄、平均体重为20.54 kg的健康无疾病的滩羊羯羊20... 详细信息

本试验将饲粮精粗比设为30∶70,并将苜蓿与复合化学处理稻草以40∶60组合作为粗饲料,研究复合化学处理稻草饲粮中添加过瘤胃蛋氨酸对舍饲滩羊生长性能、屠宰性能和肉品质的影响。选取4月龄、平均体重为20.54 kg的健康无疾病的滩羊羯羊20只,随机分为5组,每组4只,对照组饲喂基础饲粮,试验Ⅰ、Ⅱ、Ⅲ和Ⅳ组在基础饲粮中分别添加1.5、3.0、4.5和6.0 g/(d·只)过瘤胃蛋氨酸,进行饲养试验,预试期15 d,正试期60 d。于试验第1天测定试验羊只的初始体重,记录试验期间每日采食量,饲养试验结束当天测定试验羊只的终末体重。屠宰试验于饲养试验结束后的第2天进行,试验羊屠宰后剥离胴体,现场测定羊肉理化指标,并采集肉样进行常规营养成分分析。结果显示:1)与对照组相比,饲粮中添加过瘤胃蛋氨酸对舍饲滩羊总增重和平均日增重均无显著影响(P>0.05),但以试验Ⅲ组的总增重和平均日增重最高。各试验组的料重比均低于对照组(P>0.05),且以试验Ⅲ组的料重比最低。2)在屠宰性能方面,各组宰前活重、胴体重、屠宰率无显著差异(P>0.05)。试验Ⅲ组的净肉率显著高于对照组(P0.05)。3)在羊肉理化指标方面,试验Ⅲ组羊肉滴水损失显著低于对照组(P0.05);各组羊肉剪切力无显著差异(P>0.05),但以试验Ⅲ组的剪切力最低。4)在羊肉常规营养成分方面,各试验组羊肉粗蛋白质含量均显著高于对照组(P0.05)。由此得出,在饲粮中添加过瘤胃蛋氨酸可在一定程度上提高舍饲滩羊的增重、胴体净肉率和肉品质,且当过瘤胃蛋氨酸添加量为4.5 g/(d·只)时效果最好。

关键词：复合化学处理稻草饲粮过瘤胃蛋氨酸滩羊增重肉品质

Migratable Power System Transient Stability AssessmentMethod Based on Improved XGBoost

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Energy Engineering 2024年第7期121卷 1847-1863页

作者： Ying Qu Jinhao Wang Xueting Cheng Jie Hao Weiru Wang Zhewen Niu yuxiang Wu Electric Power Science Research Institute State Grid Shanxi Electric Power CompanyTaiyuan030000China Department of Electrical and Power Engineering Taiyuan University of TechnologyTaiyuan030024China

The data-driven transient stability assessment(TSA)of power systems can predict online real-time prediction by learning the temporal features before and after ***,the accuracy of the assessment is limited by the quality of the data and has weak *** on this,this paper proposes a method for TSA of power systems based on an improved extreme gradient boosting(XGBoost)***,the gradient detection method is employed to remove noise interference while maintaining the original time series *** this basis,a focal loss function is introduced to guide the training of theXGBoostmodel,enhancing the deep exploration of minority class samples to improve the accuracy of the model ***,to improve the generalization ability of the evaluation model,a transfer learning method based on model parameters and sample augmentation is *** simulation analysis on the IEEE 39-bus system demonstrates that the proposed method,compared to the traditional machine learning-based transient stability assessment approach,achieves an average improvement of 2.16%in evaluation ***,under scenarios involving changes in topology structure and operating conditions,the accuracy is enhanced by 3.65%and 3.11%,***,the model updating efficiency is enhanced by 14–15 times,indicating the model’s transferable and adaptive capabilities across multiple scenarios.

关键词： Transient stability assessment data-driven segmented focusing approximation portability

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垃圾填埋气产量的估算与测试

太阳能学报 2006年第3期27卷 255-258页

作者：陈泽智刘涛唐秋萍周玉香南京大学环境学院环境工程系南京210093

针对某垃圾填埋场,采用IPCC模型和Gardner-Probert模型理论对填埋气总产量和年产气量进行了计算,结果表明,以600m3/h的抽气量进行利用可使用10a以上,具有很好的利用前景。利用开发出的填埋气测试装置,进行了单井抽气能力的测试,通过长... 详细信息

针对某垃圾填埋场,采用IPCC模型和Gardner-Probert模型理论对填埋气总产量和年产气量进行了计算,结果表明,以600m3/h的抽气量进行利用可使用10a以上,具有很好的利用前景。利用开发出的填埋气测试装置,进行了单井抽气能力的测试,通过长达半年的连续抽气运行实验,单井抽气流量可以稳定在40m3/h。

关键词：垃圾填埋气产气量估算测试

金融深化改革背景下货币政策对国内大宗商品价格波动的动态冲击效应

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商业经济研究 2022年第24期 183-187页

作者：周钰翔赵景峰西北大学经济管理学院陕西西安710127

随着金融领域深化改革步伐的加快,我国货币政策的出台频率更高,影响范围更广,因此,研究货币政策对大宗商品价格波动传导机制具有重要的指导意义。本文使用TVP-SV-VAR模型,从利率和货币供应量的视角分别检验价格型和数量型货币政策对大... 详细信息

随着金融领域深化改革步伐的加快,我国货币政策的出台频率更高,影响范围更广,因此,研究货币政策对大宗商品价格波动传导机制具有重要的指导意义。本文使用TVP-SV-VAR模型,从利率和货币供应量的视角分别检验价格型和数量型货币政策对大宗商品价格的影响。结果表明,货币政策对大宗商品价格的影响具有时变性和非对称性的特征。相比于货币供应量而言,利率的冲击对大宗商品价格波动的显著性影响更大,存在负向的脉冲响应,而货币供应量对大宗商品价格具有正向脉冲效应。

关键词：货币政策大宗商品价格波动非对称 TVP-SV-VAR模型

DR-IS:Dynamic Response Incremental Scheduling in Time-Sensitive Network

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China Communications 2024年第10期21卷 28-42页

作者： Pei Jinchuan Hu yuxiang Tian Le Li Ziyong PLA Strategic Support Force Information Engineering University Zhengzhou 450002China

Time-Sensitive Network(TSN)with deterministic transmission capability is increasingly used in many emerging *** mainly guarantees the Quality of Service(QoS)of applications with strict requirements on time and *** of the core features of TSN is traffic scheduling with bounded low delay in the ***,traffic scheduling schemes in TSN are usually synthesized offline and lack *** implement incremental scheduling of newly arrived traffic in TSN,we propose a Dynamic Response Incremental Scheduling(DR-IS)method for time-sensitive traffic and deploy it on a software-defined time-sensitive network *** the premise of meeting the traffic scheduling requirements,we adopt two modes,traffic shift and traffic exchange,to dynamically adjust the time slot injection position of the traffic in the original scheme,and determine the sending offset time of the new timesensitive traffic to minimize the global traffic transmission *** evaluation results show that DRIS method can effectively control the large increase of traffic transmission jitter in incremental scheduling without affecting the transmission delay,thus realizing the dynamic incremental scheduling of time-sensitive traffic in TSN.

关键词： incremental scheduling time-sensitive network traffic scheduling transmission jitter