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Assessment of rhizosphere bacterial diversity and composition between a metal hyperaccumulator（Boehmeria nivea） and a non-accumulator（Artemisia annua） in an antimony compound pollution mine

Assessment of rhizosphere bacterial diversity and compositio...

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中国毒理学会环境与生态毒理学专业委员会第七届学术研讨会

作者： Lin Yuxiang du yihuan Yang Li Zhang Yaqi duan Renyan College of Agriculture and Biotechnology Hunan University of HumanitiesScience and Technology

Heavy metal hyperaccumulator is widely used in mining restoration for their high ability of heavy metal accumulation and transportation, compared to non-accumulator. Rhizosphere bacteria in metal hyperaccumulators act on a key role in the uptake of heavy metals from soil, however, assessments of rhizosphere bacteria between metal hyperaccumulators and non-accumulator have been largely ***, the diversity and composition of rhizosphere bacteria between a metal hyperaccumulator（Boehmeria nivea） and a non-accumulator（Artemisia annua）grown in the same field in Xikuangshan（the largest Sb mine in the world） were evaluated by using Illumina Miseq high-throughput sequencing technology with QIIME2 software. The results showed that the dominant phylum and genus of rhizosphere bacteria between B. nivea and A. annua were similar, but some rhizosphere bacterial communities with heavy metal remediation ability mainly appeared in the rhizosphere of the hyperaccumulator. Compared to A. annua, B. nivea significantly increased the relative abundance of rhizosphere bacteria, such as the Acidobacteria and Bacteroidete at the phylum level, and RB41 at the genus *** specific rhizosphere bacteria with the ability to bind metal, such as Leifsonia and Kibdelosporangium, were only found in the rhizosphere of B. nivea. Results indicated that B. nivea, as a metal hyperaccumulator, had a key function in governing metal resistant rhizosphere bacteria in response to antimony compound pollution stress.

关键词： Microbial diversity Heavy metal pollution Hyperaccumulator,Non-accumulator

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Effects of biochar and functional microorganisms on rice and soil in antimony mine

Effects of biochar and functional microorganisms on rice and...

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第十二届重金属污染防治技术及风险评价研讨会

作者： Wei Hu Renyan duan Jing Bai Yu Zheng Yucai Luo Yaqi Zhang yihuan du Li Yang Yuxiang Lin College of Agriculture and Biology Technology Hunan University of Humanities Science and Technology

To reduce the degree of heavy metal antimony on rice,the effects of rice yield and heavy metal enrichment were studied and compared through the modification of biochar and functional *** results showed that:1) The surface area of biochar was significantly increased after modified *** addition of magnetic biochar and pure biochar could both significantly reduce the Sb enrichment of rice,while magnetic biochar could reduce the heavy metal enrichment coefficient.2) Bacillus subtilis(BS) had the best effect on rice 1000-grain weight and yield per plant,increasing by 15.38% and 10.49%,respectively,and reducing heavy metal Sb enrichment coefficient by 48.56%.3) Sequencing results of rhizosphere microorganisms showed that non-dominant bacteria had significant differences compared with CK,indicating that they would not have a significant impact on the structure of the rhizosphere microbial community,but would have a greater impact on the abundance of some microorganisms sensitive to heavy metals.4) LC-MS results showed that there were 35 different metabolites in BS vs CK,and two metabolic pathways are significantly affected.5) The effects of single application,physical adsorption and sodium alginate embedding on rice biomass and heavy metal enrichment were *** comparative analysis of rice yield and heavy metal enrichment through biochar and functional microorganisms is conducive to finding remediation materials and methods to reduce local heavy metal pollution,providing new guidance and reference plans for local ecological restoration.

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环境胁迫和根系动态研究现状

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安徽农学通报 2020年第21期26卷 10-13页

作者：杜易桓马银花湖南人文科技学院农业与生物技术学院/农田杂草防控技术与应用协同创新中心湖南娄底417000

根是植物重要的器官之一,其作用是为植物吸收水分和营养。根系动态生长的过程对环境因子的变化感知较为敏感,容易受到环境因子的胁迫。在根系动态生长的过程中也会产生一定的变化来反馈环境因子的胁迫,这是植物根系在动态生长的过程中... 详细信息

根是植物重要的器官之一,其作用是为植物吸收水分和营养。根系动态生长的过程对环境因子的变化感知较为敏感,容易受到环境因子的胁迫。在根系动态生长的过程中也会产生一定的变化来反馈环境因子的胁迫,这是植物根系在动态生长的过程中对环境胁迫的适应(根长、根面积、根体积,根系的空间构型、根系的组织结构等发生适应性变化)。环境胁迫和根系动态研究对植物根系塑造提供了重要参考依据,也对培育适应特定环境的植物具有一定的指导意义。

关键词：根系动态生长环境因子根系塑造

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自我效能感在腹膜透析患者病耻感与社会疏离感间的中介作用

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联勤军事医学 2023年第12期37卷 1036-1039页

作者：杜茸茸李嵘杜益焕陈盼盼空军军医大学第一附属医院肾脏内科陕西西安710032

目的探讨腹膜透析患者病耻感、自我效能感、社会疏离感状况及三者间的路径作用关系。方法2023-01~03月采用方便取样法对西安市某三甲医院377名腹膜透析患者进行问卷调查,调查工具包含一般资料调查表、腹膜透析患者病耻感量表、自我效能... 详细信息

目的探讨腹膜透析患者病耻感、自我效能感、社会疏离感状况及三者间的路径作用关系。方法2023-01~03月采用方便取样法对西安市某三甲医院377名腹膜透析患者进行问卷调查,调查工具包含一般资料调查表、腹膜透析患者病耻感量表、自我效能感量表和社会疏离感量表。结果腹膜透析患者病耻感得分为(76.33±7.72)分,自我效能感得分为(24.71±5.33)分,社会疏离感得分为(43.57±8.54)分。以病耻感为自变量,社会疏离感为因变量,自我效能感为中介变量,通过结构方程模型分析。结果显示,腹膜透析患者的病耻感对社会疏离感有直接作用,并通过自我效能感的中介作用对社会疏离感起间接作用(P均<0.01)。结论腹膜透析患者社会疏离状况较严重,病耻感会加剧患者的社会疏离感,但良好的自我效能感可以缓解病耻感对社会疏离感的影响。应注重对腹膜透析患者的健康宣教,减轻患者的病耻感,提升患者的自我效能感,减少社会疏离感,使其更好的融入社会。

关键词：腹膜透析患者病耻感自我效能感社会疏离中介作用

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The AGN Feedback in Compact Galaxies:On the Impact of a More Massive Central Black Hole

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Research in Astronomy and Astrophysics 2023年第10期23卷 299-307页

作者： yihuan Di Feng Yuan Suoqing Ji Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China University of Chinese Academy of Sciences Beijing 100049China

We conduct high-resolution hydrodynamical simulations using the MACER framework to investigate the interplay between the interstellar medium,active galactic nuclei(AGN)feedback and black hole(BH)feeding in a massive compact galaxy,with an emphasis on the impact of different central BH *** find that with a more massive central BH,high-speed outflows are more prominent,and the gas fraction in the compact galaxy is *** to the lower gas density and higher gas temperature,the compact galaxy with a more massive BH(MAS galaxy)remains predominantly single-phase with the cooling time t_(cool)■100t_(ff).In contrast,the compact galaxy with the reference BH mass(REF galaxy)maintains a higher gas fraction with a shorter cooling time,slightly more multiphase gas and less prominent *** further demonstrate that the difference in gas thermal states and kinematics is caused by the stronger AGN feedback in the compact galaxy with a more massive BH,where the AGN wind power is twice as much as that with the reference *** the AGN feedback efficiently suppresses the inflow rate and the BH feeding rate,the BH mass growth is significant in neither the compact galaxy with the reference BH nor that with the more massive BH,only by 24%and 11%of the initial BH mass,respectively,over the entire evolution time of 10 *** thus posit that without ex situ mass supply from mergers,the massive BHs in compact galaxies cannot grow significantly via gas accretion during the late phase,but might have already formed by the end of the rapid early phase of galaxy formation.

关键词： galaxies:active galaxies:evolution galaxies:nuclei (galaxies:)quasars:supermassive black holes

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Translational zero-disturbance curve and its application to zero-disturbance motion planning of space manipulator system

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Science China(Technological Sciences) 2011年第5期54卷 1234-1239页

作者： LIAO yihuan LI DaoKui TANG GuoJin College of Aerospace and Materials Engineering National University of Defense Technology Changsha 410073 China

A new motion planning method is proposed for enlarging the solvable space of zero-disturbance motion planning for the space free-floating manipulator system. First, a class of translational zero-disturbance curves is put forward for the first time. The equation of translational zero-disturbance curve is deduced using the nonholonomic constraint of the manipulator system, and its characteristics are also discussed. Second, the zero-disturbance curve of the whole operating process is divided into two segments. The first one is a translational zero-disturbance curve which passes through the target point. Another one is a common zero-disturbance curve which passes through the original point and intersects with the translational zero-disturbance curve. Finally, the common zero-disturbance curve is obtained by a hybrid programming strategy based on Gauss pseudo-spectral method (GPM) and direct shooting method (DSM). The numerical simulation results indicate that the proposed method is effective, and that the solvable space of this method almost covers the whole work space of the manipulator system.

关键词： motion planning space manipulator muitibody system zero-disturbance curve

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Topological non-reciprocal robust waveguide transport

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 39-45页

作者： Ruizhi Dong yihuan Zhu Dongxing Mao Xu Wang Yong Li Institute of Acoustics Tongji UniversityShanghai 200092China

Devices that surpass the restriction of reciprocity of classical physical waves have brought intriguing possibilities for wave ***-reciprocal acoustic devices that rely on the viscosity of the medium or nonlinear effect have low efficiency and distortion problems respectively,and poor immunity to *** appearance of acoustic topological insulators achieves nonreciprocal transport with high ***,the local nature of topological states means that their appearance depends on a system with a larger *** is,most of the area of a topological device is occupied by useless lattices that do not directly contribute to non-reciprocal *** extra cost of topology protection severely limits the application scenarios of topology states,decreases the cost-effectiveness of topology devices,and is not conducive to device miniaturization and *** this work,we construct an acoustic three-layer heterojunction by introducing two types of domain walls into a conventional quantum Hall effect acoustic topological insulator,and successfully construct a non-reciprocal scattering network that forms topological modes spanning the interlayer *** extended states are still protected by bulk-band topology,making their non-reciprocity robust against *** structure flawlessly realizes the path broadening in a two-dimensional topological system and can accomplish functions such as non-reciprocal acoustic splitting and multichannel *** work opens up opportunities for developing topological-insulator-based non-reciprocal devices in acoustics.

关键词： reciprocal topological topology

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Framework on low-carbon retrofit of rural residential buildings in arid areas of northwest China:A case study of Turpan residential buildings

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Building Simulation 2023年第2期16卷 279-297页

作者： Junkang Song Wanjiang Wang Pingan Ni Hanjie Zheng Zihan Zhang yihuan Zhou College of Architectural and Civil Engineering Xinjiang University830017China College of Architecture Xi'an University of Architecture and Technology710000China College of Architecture and Environment Sichuan University610065China

At present,buildings in arid and hot regions are facing severe challenges of indoor comfort improvement and carbon emission reduction,especially in rural ***-objective optimization could be an effective tool for tackling the aforementioned ***,this paper proposes a life-cycle optimization framework considering thermal comfort,which is beneficial to promoting residents’motivation for low-carbon retrofit in arid climate ***,in response to the above problems,three objective functions are specified in the framework,which are global warming potential(GWP),life cycle cost(LCC),and thermal discomfort hours(TDH).To improve the optimization efficiency,this research uses Deep Neural Networks(DNN)combined with NSGA-II to construct a high-precision prediction model(meta-model for optimization)based on the energy consumption simulation database formed by the orthogonal multi-dimensional design *** accuracy index of the modified model is R2>0.99,cv(RMSE)≤1%,and NMBE≤0.2%,which gets rid of the dilemma of low prediction accuracy of traditional machine learning *** the scheme comparison and selection stage,the TOPSIS based on two empowerment methods is applied to meet different design tendencies,where the entropy-based method can avoid the interference of subjective preference and significantly improve the objectivity and scientific nature of decision ***,sensitivity analysis is conducted on the variables,which supports guidance for practitioners to carry out the low-carbon ***,the multi-objective optimization analysis for a farmhouse in Turpan is taken as a case study to evaluate the performance of the *** results show that the framework could significantly improve the building performance,with 60.8%,52.5%,and 14.2%reduction in GWP,LCC,and TDH,respectively.

关键词： life cycle assessment arid regions deep neural networks entropy-based TOPSIS method multi-criteria optimization

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Improvement of High-Temperature Mechanical Properties of Low-Carbon RAFM Steel by MX Precipitates

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Acta Metallurgica Sinica(English Letters) 2018年第7期31卷 706-712页

作者： Jianguo Chen Yongchang Liu Yantong xiao yihuan Liu Chenxi Liu Huijun Li State Key Lab of Hydraulic Engineering Simulation andSafety School of Materials Science and EngineeringTianjin UniversityTianjin 300350China Tianjin Special Equipment Inspection Institute Tianjin 300192China

To investigate the influence of tantalum content on high-temperature mechanical properties of low-carbon reduced acti- vation ferritic/martensitic （RAFM） steels, RAFM steels containing different tantalum contents （0 and 0.073%） were fabricated, and the tensile tests at room temperature and high temperature were performed, as well as the creep tests were conducted at 550 ~C with the applied stress of 180 and 220 MPa. It was found that 0.073% tantalum addition results in the increase in amount of stable carbonitrides （MX）, and the creep rupture time of the steel under 180 MPa is obviously increased. In addition, the increase in MX caused by tantalum addition also leads to the improvement of high-temperature tensile strength. The improvement of high-temperature mechanical properties of RAFM steels is primarily related to the evolution of precipitates.

关键词： Low-carbon RAFM steels Tantalum addition Precipitates High-temperature mechanical properties

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An improved neural network model for battery smarter state-of-charge estimation of energy-transportation system

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Green Energy and Intelligent Transportation 2023年第2期2卷 56-65页

作者： Bingzhe Fu Wei Wang yihuan Li Qiao Peng School of Control and Computer Engineering North China Electric Power UniversityBeijing102206China Group of Information Technology Analytics&OperationsQueen's University BelfastBelfastBT95EEUK

The safety and reliability of battery storage systems are critical to the mass roll-out of electrified transportation and new energy *** achieve safe management and optimal control of batteries,the state of charge(SOC)is one of the important *** machine-learning based SOC estimation methods of lithium-ion batteries have attracted substantial interests in recent ***,a common problem with these models is that their estimation performances are not always stable,which makes them difficult to use in practical *** address this problem,an optimized radial basis function neural network(RBF-NN)that combines the concepts of Golden Section Method(GSM)and Sparrow Search Algorithm(SSA)is proposed in this ***,GSM is used to determine the optimum number of neurons in hidden layer of the RBF-NN model,and its parameters such as radial base center,connection weights and so on are optimized by SSA,which greatly improve the performance of RBF-NN in SOC *** the experiments,data collected from different working conditions are used to demonstrate the accuracy and generalization ability of the proposed model,and the results of the experiment indicate that the maximum error of the proposed model is less than 2%.

关键词： Battery management SOC estimation Data science Neural network Golden section method Sparrow search algorithm

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