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A Nontrivial Product in the May Spectral Sequence

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Journal of Mathematical Research and Exposition 2011年第2期31卷 359-365页

作者： li Nan zhong yong Jie PIAO Department of Mathematics Yanbian University Jilin 133000 P. R. China

In this paper,we prove the non-triviality of the product h 0 k o δ s＋4 ∈ Ext s＋6,t（s） A （Z p ,Z p ） in the classical Adams spectral sequence,where p ≥ 11,0 ≤ s p-4,t（s） = （s ＋ 4）p 3 q ＋（s ＋ 3）p 2 q ＋（s ＋ 4）pq ＋（s ＋ 3）q ＋ s with q = 2（p-1）.The elementary method of proof is by explicit combinatorial analysis of the （modified） May spectral sequence.

关键词： stable homotopy groups of spheres Adams spectral sequence May spectral sequence

思政教育在“果树栽培学总论”课程中的应用——以河北农业大学为例

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教育教学论坛 2024年第7期 125-128页

作者：梁博文李中勇周莎莎河北农业大学园艺学院河北保定071001

大学教育承载着立德树人根本任务,高校课堂在传授专业知识的同时,也应发挥课程育人作用。将思政教育融入课程教学的每个环节中,加强学生专业素养和德行的共同培养,实现全方位、全过程育人。“果树栽培学”是园艺专业核心课程之一,在培... 详细信息

大学教育承载着立德树人根本任务,高校课堂在传授专业知识的同时,也应发挥课程育人作用。将思政教育融入课程教学的每个环节中,加强学生专业素养和德行的共同培养,实现全方位、全过程育人。“果树栽培学”是园艺专业核心课程之一,在培养高素质专业型园艺人才和服务乡村振兴中发挥着重要作用。以河北农业大学“果树栽培学总论”课程为例,充分挖掘课程教学过程中蕴含的思政元素,将思政教育润物无声地融入课程教学的各个环节,以期为农林高校园艺专业课程思政教育提供参考。

关键词：课程思政果树栽培学总论思政元素课程设计

Energy consumption optimization for edge computing-supported cellular networks based on optimal transport theory

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Science China(Information Sciences) 2024年第2期67卷 201-218页

作者： Xiangyu LV Xiaohu GE Yi zhong Qiang li yong XIAO School of Electronic Information and Communications Huazhong University of Science and Technology

With advancements in mobile communication technologies, there have been multiple user device(UD) connections to cellular networks. Because of changes in the spatial distribution of UDs and application requirements, the traditional offloading mechanism based on the nearest distance will result in heavy loads for some base stations(BSs). Because there is a high-order relationship between the energy consumption of the BS processing tasks and the number of computing tasks, the traditional offloading mechanism will result in high energy consumption, and UD’s offloading decision must be dynamically adjusted. The offloading decision of UDs is optimized based on detailed information about various parameters associated with a network from the standpoint of distribution. This information includes details regarding the spatial distribution of UDs,application requirements, and the offloading period of computing tasks. Based on optimal transport theory,an energy consumption optimization algorithm is suggested to lower the total amount of energy consumed by the offloading process of UDs’ computing tasks by reasonably planning the offloading BSs of the UDs in the networks. The simulation results show that the proposed offloading mechanism based on energy consumption optimization reduces the total energy consumption of the offloading process by 28.09% when compared to the traditional offloading mechanism, and the traffic managed by each BS is balanced.

关键词： optimal transport theory edge computing energy consumption reduction dynamic voltage frequency scaling

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2022年海南省公共场所卫生状况分析

现代预防医学 2024年第7期51卷 1308-1313页

作者：曾月何昌华李永忠杨夕赵仁敏梁启昌封丹陈曦海南省疾病预防控制中心中国疾病预防控制中心环境与健康相关产品安全所

目的分析海南省公共场所基本卫生状况及其主要健康危害因素，为促进公共场所卫生管理提供技术支持。方法2022年对海南省7类200家公共场所进行健康危害因素监测，并对检测结果进行统计分析。结果共监测海南省公共场所样品共计2 339份... 详细信息

目的分析海南省公共场所基本卫生状况及其主要健康危害因素，为促进公共场所卫生管理提供技术支持。方法2022年对海南省7类200家公共场所进行健康危害因素监测，并对检测结果进行统计分析。结果共监测海南省公共场所样品共计2 339份，总体合格率为83.9%。不同类型场所样品合格率差异有统计学意义（χ2=120.63,P<0.05），其中游泳场（馆）和宾馆（酒店）合格率相对较低，分别为65.8%和76.3%，其余5类场所样本整体合格率在85.7%～96.5%之间。宾馆（酒店）室内空气主要不合格指标为甲醛、细菌总数、PM10和PM2.5；理发店和美容店两类场所室内空气主要不合格指标为氨和PM10；商场（超市）室内空气不合格指标主要是细菌总数。6类公共场所监测的各类公共用品用具均检出细菌总数超标；宾馆（酒店）、美容店和理发店毛巾pH值不合格率分别为43.2%、13.6%和11.4%。游泳场（馆）主要不合格指标是游泳池水pH值、尿素和氧化还原电位，其中氧化还原电位不合格率为29.6%。结论 2022年海南省公共场所卫生状况仍有待提高，建议相关部门进一步加强对室内空气细菌总数、氨、PM10、PM2.5、甲醛，公共用品用具细菌总数、大肠菌群、毛巾pH值以及游泳池水氧化还原电位、尿素、pH值等重点指标的监督与监测。

关键词：公共场所室内空气质量公共用品用具游泳池水质

Structure of a new sterol from the South China sponge Dysidea fragilis

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Chinese Journal of Chemistry 1993年第6期11卷 560-564页

作者： yong-li zhong Jing-Yu Su Long-Mei Zeng Wei Shen Qi-Wen Wang Department of Chemistry Zhongshan University Guangzhou 510275 State Key Laboratory of Bioorganic and Natural Products Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032

A new sterol, 5a-cholesta-8(14),24(25)-diene-3/β, 6a-diol (1) and a known sterol (24Z)- 24-ethyl-cholesta-7(8),24(28)-diene-3β,5a,6β-triol (2) have been isolated from the South China Sea sponge Dysidea fragilis. Th... 详细信息

关键词： Structure of a new sterol from the South China sponge Dysidea fragilis ppm

Investigation of gravity influence on EOR and CO_(2) geological storage based on pore-scale simulation

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Petroleum Science 2024年第2期21卷 987-1001页

作者： yong-Mao Hao Gui-Cheng Wu Zong-Fa li zhong-Hui Wu yong-Quan Sun Ran liu Xing-Xing li Bo-Xin Pang Nan li Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)) Ministry of EducationQingdao266580ShandongChina School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina School of Petroleum Engineering Yangtze UniversityWuhan430100HubeiChina Dongsheng Jinggong Petroleum Development Group Co. LtdShengli Oilfield CompanySINOPECDongying257001ShandongChina

Gravity assistance is a critical factor influencing CO_(2)-Oil mixing and miscible flow during EOR and CO_(2)geological *** on the Navier-Stokes equation,component mass conservation equation,and fluid property-composition relationship,a mathematical model for pore-scale CO_(2) injection in oilsaturated porous media was developed in this *** model can reflect the effects of gravity assistance,component diffusion,fluid density variation,and velocity change on EOR and CO_(2) *** nonhomogeneous porous media,the gravity influence and large density difference help to minimize the velocity difference between the main flow path and the surrounding area,thus improving the oil recovery and CO_(2) *** CO_(2) injection angles and oil-CO_(2) density differences can increase the oil recovery by 22.6% and 4.2%,respectively,and increase CO_(2) storage by 37.9% and 4.7%,*** diffusion facilitates the transportation of the oil components from the low-velocity region to the main flow path,thereby reducing the oil/CO_(2) concentration difference within the porous *** diffusion can increase oil recovery and CO_(2) storage by 5.7% and 6.9%,*** addition,combined with the component diffusion,a low CO_(2) injection rate creates a more uniform spatial distribution of the oil/CO_(2) component,resulting in increases of 9.5% oil recovery and 15.7% CO_(2) storage,*** study provides theoretical support for improving the geological CO_(2) storage and EOR processes.

关键词： Gravity Flow simulation CO_(2)-oil mixing Enhanced oil recovery(EOR) Geological storage

High-temperature wetting behavior between slag and refractory

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Journal of Iron and Steel Research International 2024年第6期31卷 1304-1319页

作者： yong-xin Wang Ya-ge li Ya-bo Gao zhong Huang Hai-jun Zhang The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina

Slag corrosion is one of the main factors of the damage of refractory,and its primary manifestations involve the melting of refractory in slag and the slag penetration into refractory,both of which are highly related to the wetting behavior between slag and *** high-temperature wettability could be characterized by parameters including the surface tension,adhesion work,and spreading coefficient of the slag on refractory surface,and it could be suppressed by altering the slag/refractory interface,thus resulting in an improved anti-corrosion *** this,the key knowledges of the slag corrosion,theory of wetting behavior and test of high-temperature contact angle were firstly ***,the major factors influencing the high-temperature slag wetting behavior were discussed based on the aspects of slag composition,refractory composition,and surface ***,the future research direction was proposed in this field.

关键词： High-temperature wetting Refractory Slag corrosion Surface tension

Miniaturized power detection module operating in millimeter wave band

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Journal of Electronic Science and Technology 2024年第2期22卷 69-76页

作者： Xiang Zhou Zhi-yong zhong School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu611731China

The miniaturized broadband detection module can be embedded into the microwave application system such as the front end of the transmitter to detect the power or other parameters in real *** is highly prospective in military and scientific *** this paper,a broadband power detection module operating at 26.5 GHz-40.0 GHz is designed by using low-barrier Schottky diode as the detector and a comparator for threshold *** module can dynamically detect the power range between-10 dBm and 10 dBm with the detection accuracy of 0.1 ***,the temperature compensation circuit is also applied to improve the measurement *** a result,the resulted error low to±1 dB in the temperature range of -55℃ to +85℃ is *** designed module is encapsulated by a Kovar alloy with a small volume of 9 mm×6 mm×3 *** endows the designed module the advantages of small size,easy integration,and low cost,and even it is applicable to high-reliability environments such as satellites.

关键词： Diode Miniaturization Power detection Temperature compensation

Engineering g-C_(3)N_(4)based materials for advanced photocatalysis:Recent advances

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Green Energy & Environment 2024年第2期9卷 166-197页

作者： Xin-lian Song Lei Chen li-Jiao Gao Jin-Tao Ren zhong-yong Yuan National Institute for Advanced Materials School of Materials Science and EngineeringSmart Sensing Interdisciplinary Science CenterNankai UniversityTianjin300350China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin300071China

Photocatalysis driven by abundant yet intermittent solar energy has considerable potential in renewable energy generation and environmental *** outstanding electronic structure and physicochemical properties of graphitic carbon nitride(g-C_(3)N_(4)),together with unique metal-free characteristic,make them ideal candidates for advanced photocatalysts *** review summarizes the up-to-date advances on g-C_(3)N_(4)based photocatalysts from ingenious-design strategies and diversified photocatalytic ***,the advantages,fabrication methods and limitations of each design strategy are systemically *** order to deeply comprehend the inner connection of theory–structure–performance upon g-C_(3)N_(4)based photocatalysts,structure/composition designs,corresponding photocatalytic activities and reaction mechanisms are jointly discussed,associated with introducing their photocatalytic applications toward water splitting,carbon dioxide/nitrogen reduction and pollutants degradation,***,the current challenges and future perspectives for g-C_(3)N_(4)based materials for photocatalysis are briefly *** design strategies and limitations are also instructive for constructing g-C_(3)N_(4) based materials in other energy and environment-related applications.

关键词： Graphitic carbon nitride g-C_(3)N_(4) Design strategies Photocatalysis Photocatalysts Reaction mechanism