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Calcium carbonate promotes the formation and stability of soil macroaggregates in mining areas of china

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Journal of Integrative Agriculture 2024年第3期23卷 1034-1047页

作者： Junyu Xie jianyong Gao Hanbing Cao Jiahui Li Xiang Wang Jie zhang Huisheng Meng Jianping {2. Tingliang Li Minggang Xu college of Resources and Environment Shanxi Agricultural UniversityTaigu 030801China Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources Taiyuan 030031China college of Land Science and Technology China Agricultural UniversityBeijing 100193China

We studied changes in the concentrations of aggregate-cementing agents after different reclamation times and with different fertilization regimes,as well as the formation mechanism of aggregates in reclaimed soil,to provide a theoretical basis for rapid reclamation of soil fertility in the subsidence area of coal mines in Shanxi Province,*** this study,soil samples of 0–2. cm depth were collected from four fertilization treatments of a longterm experiment started in 2.08:no fertilizer (CK),inorganic fertilizer (NPK),chicken manure compost (M),and50%inorganic fertilizer plus 50%chicken manure compost (MNPK).The concentrations of cementing agents and changes in soil aggregate size distribution and stability were *** results showed that the formation of>2.mm aggregates,the aggregate mean weight diameter (MWD),and the proportion of>0.2. mm water-stable aggregates (WR_(0.2.)) increased significantly after 6 and 11 years of *** concentration of organic cementing agents tended to increase with reclamation time,whereas free iron oxide (Fed) and free aluminium oxide(Ald) concentrations initially increased but then *** general,the MNPK treatment signi?cantly increased the concentrations of organic cementing agents and CaCO_(3),and CaCO_(3) increased by 60.4%at 11 years after ***,CaCO_(3) had the greatest effect on the stability of aggregates,promoting the formation of>0.2. mm aggregates and accounting for 54.4%of the variance in the proportion and stability of the *** was concluded that long-term reclamation is bene?cial for improving soil *** MNPK treatment was the most effective measure for increasing maize grain yield and concentration of organic cementing agents and CaCO_(3).

关键词： reclamation time manure combined with inorganic fertilizer soil aggregate stability cementing agents CaCO_(3)

Biomolecular condensates and disease pathogenesis

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Science china(Life Sciences) 2024年第9期67卷 1792-1832页

作者： Ke Ruan Ge Bai Yanshan Fang Dan Li Tingting Li Xingguo Liu Boxun Lu Qing Lu Zhou Songyang shuguo Sun Zheng Wang Xin zhang Wen Zhou {2. zhang The First Affiliated Hospital&School of Life Sciences Ministry of Education Key Laboratory for Membrane-less Organelles&Cellular DynamicsHefei National Research Center for Interdisciplinary Sciences at the MicroscaleCenter for Advanced Interdisciplinary Science and Biomedicine of IHMDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230027China Nanhu Brain-computer Interface Institute Hangzhou 311100China Department of Neurology of Second Affiliated Hospital and School of Brain Science and Brain Medicine Zhejiang University School of MedicineHangzhou 310058China Interdisciplinary Research Center on Biology and Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 201210China university of Chinese Academy of Sciences Beijing 100049China Bio-X Institutes Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders(Ministry of Education)Shanghai Jiao Tong UniversityShanghai 200030China Department of Biomedical Informatics School of Basic Medical SciencesPeking University Health Science CenterBeijing 100191China CAS Key Laboratory of Regenerative Biology Joint School of Life SciencesGuangzhou Institutes of Biomedicine and HealthChinese Academy of SciencesGuangzhou 510530China Joint School of Life Sciences Guangzhou Medical UniversityGuangzhou 510000China Neurology Department at Huashan Hospital State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain ScienceInstitutes of Brain ScienceSchool of Life SciencesFudan UniversityShanghai 200433 China Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders Ministry of EducationBio-X InstitutesShanghai Jiao Tong UniversityShanghai 200030China State Key Laboratory of Biocontrol MOE Key Laboratory of Gene Function and Regulation and Guangzhou Key Laboratory of Healthy Aging ResearchSchool of Life SciencesSun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510275China Department of Human Anatomy Hist

Biomolecular condensates or membraneless organelles(MLOs)formed by liquid-liquid phase separation(LLPS)divide intracellular spaces into discrete compartments for specific *** of LLPS or aberrant phase transition that disturbs the formation or material states of MLOs is closely correlated with neurodegeneration,tumorigenesis,and many other pathological ***,we summarize the recent progress in development of methods to monitor phase separation and we discuss the biogenesis and function of MLOs formed through phase *** then present emerging proof-of-concept examples regarding the disruption of phase separation homeostasis in a diverse array of clinical conditions including neurodegenerative disorders,hearing loss,cancers,and immunological ***,we describe the emerging discovery of chemical modulators of phase separation.

关键词： liquid-liquid phase separation biomolecular condensate membraneless organelle

Extended light absorption and accelerated charge migration in ultrathin twisted carbon nitride nanoplates for efficient solar hydrogen production

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Science china Chemistry 2024年第7期67卷 2215-2223页

作者： Yanmin Zou Shiyao Li Dandan Zheng jianyong Feng Sibo Wang Yidong Hou Guigang zhang State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350108China college of Environment and Safety Engineering Fuzhou UniversityFuzhou 350108China Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State MicrostructuresCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China

Polymeric carbon nitride has been widely developed as a promising photocatalyst for solar hydrogen production via photocatalytic water ***,pristine carbon nitride prepared by traditional solid-state polymerization usually encounters issues such as rapid carrier recombination and insufficient absorption of visible light below 460 ***,poly(heptazine imide)with a distinctive nanoplate structure was synthesized in a binary molten salt of NaCl–CaCl_(2..The salt template allows the formation of the thin nanoplate structure,which promotes the charge separation and ***,the intercalation of Ca^(2.)ions between the conjugated layers endows the activation of n–π*electron transition due to the distortion of in-plane heptazine ***,the optimized poly(heptazine imide)nanoplates achieve an apparent quantum efficiency of up to 17.3%at 500 nm for photocatalytic hydrogen production from *** work shares new idea for rational control of the optical absorption and charge carrier dynamics of poly(heptazine imide).

关键词： photocatalysis poly heptazine imide nanoplates ion intercalation hydrogen production

Ultra-broadband microwave absorber and high-performance pressure sensor based on aramid nanofiber,polypyrrole and nickel porous aerogel

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International Journal of Minerals,Metallurgy and Materials 2024年第8期31卷 1912-1921页

作者： Leyi zhang hongyu Jin Hanxin Liao Rao zhang Bochong Wang jianyong Xiang Congpu Mu Kun Zhai Tianyu Xue Fusheng Wen State Key Laboratory of Metastable Materials Science&Technology Yanshan UniversityQinhuangdao 066004China Key Laboratory for Microstructural Material Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao 066004China

Electronic devices have become ubiquitous in our daily lives,leading to a surge in the use of microwave absorbers and wearable sensor devices across various sectors.A prime example of this trend is the aramid nanofibers/polypyrrole/nickel(APN)aerogels,which serve dual roles as both microwave absorbers and pressure *** this work,we focused on the preparation of aramid nanofibers/polypyrrole(AP15)aerogels,where the mass ratio of aramid nanofibers to pyrrole was 1:*** employed the oxidative polymerization method for the preparation *** this,nickel was thermally evaporated onto the surface of the AP15 aerogels,resulting in the creation of an ultralight(9.35 mg·cm^(-3)).This aerogel exhibited a porous *** introduction of nickel into the aerogel aimed to enhance magnetic loss and adjust impedance matching,thereby improving electromagnetic wave absorption *** minimum reflection loss value achieved was-48.7 dB,and the maximum effective absorption bandwidth spanned 8.42.GHz with a thickness of 2.9 *** impressive metrics can be attributed to the three-dimensional network porous structure of the aerogel and perfect impedance ***,the use of aramid nanofibers and a three-dimensional hole structure endowed the APN aerogels with good insulation,flame-retardant properties,and compression *** under a compression strain of 50%,the aerogel maintained its resilience over 500 *** incorporation of polypyrrole and nickel particles further enhanced the conductivity of the ***,the final APN aerogel sensor demonstrated high sensitivity(10.78 kPa-1)and thermal *** conclusion,the APN aerogels hold significant promise as ultra-broadband microwave absorbers and pressure sensors.

关键词： porous aerogel aramid nanofibers microwave absorbers pressure sensor porous structure

ZnO-ITO/WO_(3-x)heterojunction structured memristor for optoelectronic co-modulation neuromorphic computation

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Science china Materials 2024年第9期67卷 2838-2847页

作者： jianyong Pan Tong Wu Wenhao Yang Yang Li Jiaqi zhang Hao Kan Shandong Provincial Key Laboratory of Network Based Intelligent Computing School of Information Science and EngineeringUniversity of JinanJinan250022China School of Integrated Circuits Shandong UniversityJinan250101China Key Laboratory of Automobile Materials Ministry of Education College of Materials Science and EngineeringJilin UniversityChangchun130012China

Traditional transistors confront severe challenges of insufficient computing capability and excessive power consumption in large-scale neuromorphic *** address these critical bottlenecks,we propose an optoelectronic memristor based on zinc oxide-indium tin oxide/tungsten oxide(ZnO-ITO/WO_(3-x))heterojunctions as a promising *** applying different types of electrical and optical signals,the device successfully emulates diverse synaptic functions including short-term/long-term synaptic plasticity,alongside short-term and long-term *** the ZnO-ITO functional layer enhances the photoresponse of the WO_(3-x)-based memristor and demonstrates“learning-forgetting-relearning”behavior under optical ***,based on the photoelectric cooperative memristor array,a convolutional neural network for vehicle type recognition is constructed,which solves the problem of zero weight and negative weight *** regard to energy efficiency,the neural network built with this device operates at a power level of only 10^(-3)W,representing a reduction of more than 4 orders of magnitude compared with a standard central ***,the photoelectric memristor proposed in this work provides a new idea for neuromorphic computing and is expected to promote the development of energy-efficient brain-like computing.

关键词： ZnO-ITO/WO_(3-x)heterojunction optoelectronic memristor synaptic plasticity neuromorphic computing convolutional neural network

2.2.—2.2.年四川泸定M_(S)6.8、M_(S)5.0和M_(S)5.6地震序列的发震构造及成因

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地球物理学报 2024年第4期67卷 1471-1486页

作者：张建勇王新陈凌刘杰中国地震台网中心北京100045 岩石圈演化国家重点实验室中国科学院地质与地球物理研究所北京100029 中国科学院地球与行星物理重点实验室中国科学院地质与地球物理研究所北京100029 中国科学院大学地球与行星科学学院北京100049

四川泸定2.2.年9月5日发生M_(S)6.8强震,随后10月2.日和2.2.年1月2.日又分别发生M_(S)5.0和M_(S)5.6强余震,主震和两次强余震的震中相距仅几公里却有着截然不同的震源机制解,因此,探究三者的发震构造、联系及成因至关重要.本研究利用国... 详细信息

四川泸定2.2.年9月5日发生M_(S)6.8强震,随后10月2.日和2.2.年1月2.日又分别发生M_(S)5.0和M_(S)5.6强余震,主震和两次强余震的震中相距仅几公里却有着截然不同的震源机制解,因此,探究三者的发震构造、联系及成因至关重要.本研究利用国家地震台网记录到的这三次地震序列的连续波形数据及震相资料进行双差重定位,并进一步采取CAP波形反演方法和P波初动极性反演方法获得研究区M_(L)2.5+的79个余震震源机制解.结果显示,主破裂沿鲜水河断裂磨西段,破裂彻底,余震活动性不高.沿主断裂分布的余震具有明显的分段特征,断层近直立且西北浅东南深.主震及磨西段大部分余震均为走滑机制,是典型的印度—欧亚板块挤压旋转造成鲜水河走滑断裂带应力失稳触发的强震活动.发生在贡嘎山地区的余震是M_(S)6.8主震触发的震群活动,震级水平不高,分布弥散,并没有触发与主断裂共轭的燕子沟、海螺沟和磨子沟次级断裂,而是触发了与主断裂近平行的次级隐伏断裂——贡嘎山断裂.M_(S)5.0和M_(S)5.6两次强余震均发生在该次级隐伏断裂上,断层倾角40°~50°且震源深度较浅.贡嘎山地区拉张型地震活动明显不同于走滑型为主的鲜水河断裂带,可能是印度—欧亚板块挤压旋转作用下贡嘎山快速隆升而地表快速剥离导致局部因重力卸载而垮塌造成的,M_(S)6.8主震有明显的触发作用.三次泸定强震的发生,释放了磨西段及西侧贡嘎山地区部分应力,但并未改变"Y"字形交汇区强震发生的可能性.

关键词：四川泸定地震鲜水河断裂带贡嘎山地区发震构造地震活动性

Research on semi-solid thixoforming process of AZ91D magnesium alloy brackets for generators in JH70-type motorbikes

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Rare Metals 2005年第4期24卷 381-391页

作者： WANG Kai LIU Changming HAN Zhaotang CAO jianyong zhang Zonghe college of Mechanical Engineering Chongqing University Chongqing 400044 China Chongqing Magnesium Industry Ltd. Co. Chongqing 401326 China

The investment on semi-solid die casting processes of AZ91D magnesium alloy brackets for generators in JH70-type motorbikes is introduced. The processes of low super-heat and cooling slope for the preparation of billets with non-dendritic microstructure, the remelting of billets for thixoforming and the parameters in the process of semi-sohd thixoforming have been researched. The results show that primary billets with non-dendritical structures can be prepared by forming great amount of nuclei in melt via the process of low super heat. By optimizing the remelting process through adjusting the current of the induced equipment, semi-solid billets with a structure of spherical grains were obtained from the primary billets with non-dendritical structure. The range of 580℃ to 583℃ is the proper remelting temperatures by which the billets have an expected thixotropy and can be transferred to a die-casting machine. The optimized parameters of semi-solid forming in a die-casting machine are as follows： the area of the ingate in the die is 383.5 mm^2. the speed of the pierce of the machine 5 m/s, the shot pressure of the pierce 75 MPa, and the maintenance pressure of the pierce 350 MPa. The castings of brackets for supporting generators in JH70 type motorbikes were formed by adopting the optimized processes and parameters mentioned above.

关键词： semi-solid thixoforming AZ91D magnesium alloy bracket motorbike

虚拟电厂落地适应性分析——以阿荣旗奶源基地为例

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电气工程学报 2024年第1期19卷 316-325页

作者：张赢赵建勇何麟林嘉恒国网呼伦贝尔供电公司呼伦贝尔021000 浙江大学电气工程学院杭州310027 华北电力大学电气与电子工程学院北京102206

为研究增设虚拟电厂对阿荣旗奶源基地电网改造的适应性,首先基于虚拟电厂的演进趋势以及我国发展现状,提出一套针对合约型向市场型转型的两阶段虚拟电厂运行优化模型,并基于实际情况选定两阶段的控制设备分别为电锅炉和蓄电池储能进行... 详细信息

为研究增设虚拟电厂对阿荣旗奶源基地电网改造的适应性,首先基于虚拟电厂的演进趋势以及我国发展现状,提出一套针对合约型向市场型转型的两阶段虚拟电厂运行优化模型,并基于实际情况选定两阶段的控制设备分别为电锅炉和蓄电池储能进行最优调度仿真。其次基于仿真结果,分析一阶段合约型虚拟电厂中电锅炉作为价格型负荷侧响应的经济收益,以及二阶段市场型虚拟电厂中储能对系统削峰填谷的意义。最后,通过对比虚拟电厂和扩建变电站的传统方案在系统运行稳定性和经济性上的差异,得到“虚拟电厂可以作为响应电力体制改革和清洁能源转型过渡阶段的有效思路”的结论,并根据分析结果对虚拟电厂在现阶段的实际规划和发展提出了建设性意见。

关键词：电力市场虚拟电厂储能经济调度需求响应

Some Game-Theoretic Characterizations for Rapid Filters on ω

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Chinese Annals of mathematics,Series B 2023年第2期44卷 299-306页

作者： Zuoheng LI shuguo zhang college of mathematics Sichuan UniversityChengdu 610065China

Infinite game is a power tool in studying various objects and finding descriptions of some properties of filters in ***-theoretic characterizations for meager filters,Q-filters and Ramsey filters were obtained by Tomek Bartoszynski,Claude Laflamme and Marion *** this paper,the authors obtain two game-theoretic characterizations for rapid filters onω.

关键词： Rapid filter Infinite game Game-theoretic characterization