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Responses of plant diversity and soil microorganism diversity to nitrogen addition in the desert steppe,China

Journal of Arid Land 2024年第3期16卷 447-459页

作者： YE He HONG Mei XU Xuehui liang zhiwei JIANG Na TU Nare WU Zhendan College of Grassland Resources and EnvironmentInner Mongolia Agricultural UniversityInner Mongolia Key Laboratory of Soil Quality and Nutrient ResourcesHohhot 010018China Key Laboratory of Agricultural Ecological Security and Green Development at University of Inner Mongolia Hohhot 010018China

Nitrogen(N)deposition is a significant aspect of global change and poses a threat to terrestrial *** impact of plant-soil microbe relationships to N deposition has recently attracted considerable *** microorganisms have been proven to provide nutrients for specific plant growth,especially in nutrient-poor desert steppe ***,the effects of N deposition on plant-soil microbial community interactions in such ecosystems remain poorly *** investigate these effects,we conducted a 6-year N-addition field experiment in a Stipa breviflora *** steppe in Inner Mongolia Autonomous Region,*** N treatment levels(N0,N30,N50,and N100,corresponding to 0,30,50,and 100 kg N/(hm2•a),respectively)were applied to simulate atmospheric N *** results showed that N deposition did not significantly affect the aboveground biomass of desert steppe plants.N deposition did not significantly reduce the alfa-diversity of plant and microbial communities in the desert steppe,and low and mediate N additions(N30 and N50)had a promoting effect on *** variation pattern of plant Shannon index was consistent with that of the soil bacterial Chao1 index.N deposition significantly affected the beta-diversity of plants and soil bacteria,but did not significantly affect fungal *** conclusion,N deposition led to co-evolution between desert steppe plants and soil bacterial communities,while fungal communities exhibited strong stability and did not undergo significant *** findings help clarify atmospheric N deposition effects on the ecological health and function of the desert steppe.

关键词： soil microorganisms plant-microbial community interaction plant diversity nitrogen deposition desert steppe

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Cooperative Distributed Sensors for Mobile Robot Localization

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Wireless Sensor Network 2010年第5期2卷 347-357页

作者： zhiwei liang Songhao Zhu 不详

This paper presents a probabilistic algorithm to collaborate distributed sensors for mobile robot localization. It uses a sample-based version of Markov localization—Monte Carlo localization (MCL), capable of localizing mobile robot in an any-time fashion. During robot localization given a known environment model, MCL method is employed to update robot’s belief whichever information (positive or negative) attained from environmental sensors. Meanwhile, an implementation is presented that uses color environmental cameras for robot detection. All the parameters of each environmental camera are unknown in advance and need be calibrated independently by robot. Once calibrated, the positive and negative detection models can be built up according to the parameters of environmental cameras. A further experiment, obtained with the real robot in an indoor office environment, illustrates it has drastic improvement in global localization speed and accuracy using our algorithm.

关键词： Monte Carlo Localization Environmental Camera Positive Information Negative Information

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Electrical Capacitance and Resistance Assessing Tree Vigor

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Chinese Forestry Science and Technology 2005年第4期4卷 37-42页

作者： QU zhiwei WANG Xiangfeng liang Jun Research Institute of Forest Ecology Envtronment and Protection Chinese Academy of Forestry Beiiing 100091P.R.China

The paper summarizes the research progresses of electrical capacitance and electrical resistance assessing tree vigor and points out the development direction of the study. Researches show that electrical capacitance is related to the indexes of periodic growth rate of trees, foliar biomass and diameter of breast height, while electrical resistance has inverse relationships with the above indexes. Eiectrical capacitance and electrical resistance change when trees suffer environmental stress, insect pests or diseases. Especially, changes of electrical resistance are observed before symptom expression of some tree diseases, which can help to establish a certain disease potential hazard rating system. Mechanisms of electrical capacitance and resistance assessing tree vigor, especially in molecule level, still need to be studied and the application criteria of electrical resistance and capacitance need to be established.

关键词： electrical resistance electrical capacitance tree vigor

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Reconstruction Design of Zaozhuang Gangue Hill Based on the Interaction of“Scenery”and“View”

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Journal of Landscape Research 2023年第4期15卷 9-16页

作者： CAO Ying liang zhiwei ZHANG Li School of Mechanics and Civil Engineering China University of Mining and Technology-BeijingBeijing 100083China Beijing Women’s Prison Beijing 102629China

Gangue hill is the associated accumulation landscape of long-term coal *** are a large number of gangue hills left in coal mining cities,which not only causes ecological damage but also affects the urban environment,thus becoming the focus of urban landscape transformation of coal mining *** the increase of people’s demand for ecological leisure,it has become the first choice to transform gangue hill and its surrounding areas into community *** the perspective of urban space and landscape system,as a huge regeneration landform in the city and a unique landscape in the mining area,gangue hill not only needs to be afforested,but also needs to be connected with mining heritages and landscape nodes in the city to form the interaction between“scenery”and“view”,so as to form an integrated mining cultural landscape system at the urban *** the basis of this concept,taking the gangue hill of Zhongxing in Zaozhuang City as an example,this paper quantitatively analyzes the best landscape construction site in the gangue hill via viewshed analysis in *** this method,the gangue hill and Zhongxing mining heritage are closely combined,so as to establish the interactive relationship between“scenery”and“view”.It can guide the planning and design of sightseeing route and footpath system,and also provide a technical support for the design of community parks transformed from gangue hills.

关键词： Gangue hill Zhongxing mining heritage Interaction of“scenery”and“view” Viewshed analysis

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Review on Application of Electromagnetic Theory and Technology to Forest Pests Control

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Chinese Forestry Science and Technology 2006年第1期5卷 51-56页

作者： WANG Xiangfeng QU zhiwei liang Jun Research Institute of Forest Ecology. Environment and Protection. Chinese Academy of Forestry Beijing 100091 P. R. China

Many domestic and international scholars have done a wide range of researches on electromagnetic and technology and have made some achievements. Electromagnetic technology has been used in forest pests control as a convenient and high-efficient physics means. This article summaries the current study of the electromagnetic biological effect and introduces the appfication of microwave, pulsed electromagnetic field and electrostatic field to forest pests control. The research direction and prospect of the application of electromagnetic theory and technology to forest pests control arc also discussed.

关键词： electromagnetic theory and technology biological effect forest pests control

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Co-enhancement of thermal conduction and radiation through morphologies controlling of graphene functional layer for chip thermal management

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Nano Research 2024年第10期17卷 8885-8892页

作者： Shuting Cheng Kun Wang Shichen Xu Yi Cheng Ruojuan Liu Kewen Huang Hao Yuan Wenjuan Li Yuyao Yang Fushun liang Fan Yang Kangyi Zheng zhiwei liang Ce Tu Mengxiong Liu Xiaomin Yang Jingnan Wang Xuzhao Gai Yuejie Zhao Xiaobai Wang Yue Qi Zhongfan Liu State Key Laboratory of Heavy Oil Processing College of ScienceChina University of PetroleumBeijing 102249China Centre for Nanochemistry Beijing Science and Engineering Centre for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Beijing Graphene Institute(BGI) Beijing 100095China College of Energy Soochow Institute for Energy and Materials Innovations(SIEMIS)Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006China Department of Chemistry College of Chemistry and Materials EngineeringBeijing Technology and Business UniversityBeijing 100048China

With the continuous advancements in electronics towards downsizing and integration,efficient thermal dissipation from chips has emerged as a critical factor affecting their lifespan and operational *** fan-less chip cooling system has two critical interfaces for thermal transport,which are the contact interface between the base and the chip dominated by thermal conduction,and the surface of the fins dominated by thermal *** different thermal transfer modes of these two critical interfaces pose different requirements for thermal management *** the study,a novel approach was proposed by developing graphene thermal transport functional material whose morphology could be intentionally designed via reformed plasmaenhanced chemical vapor deposition(PECVD)methods to meet the diverse requirements of heat transfer ***,graphene with multilevel branching structure of vertical graphene(BVG)was fabricated through the hydrogenassisted PECVD(H_(2)-PECVD)strategy,which contributed a high emissivity of~*** was deposited on the fins’surface and functioned as the radiation enhanced layer to facilitate the rapid radiation of heat from the heat sinks into the surrounding ***,the well-oriented vertical graphene(OVG)was successfully prepared through the vertical electric field-assisted PECVD process(EF-PECVD),which showed a high directional thermal conductivity of~53.5 W·m^(-1)·K^(-1).OVG was deposited on the contact interface and functioned as the thermal conduction enhanced layer,allowing for the quick transmission of heat from the chip to the heat *** this design concept,the two critical interfaces in the chip cooling system can be jointly enhanced,resulting in a remarkable cooling efficiency enhancement of~30.7%,demonstrating that this novel material possessed enormous potential for enhancing the performance of cooling ***,this research not only provided new design concepts for the cooling system

关键词： chip thermal management thermal conduction thermal radiation graphene morphology control

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Omnidirectional Walk of Biped Robots in RoboCup3D Simulation Environment

Omnidirectional Walk of Biped Robots in RoboCup3D Simulation...

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第26届中国控制与决策会议

作者： Ping Shen zhiwei liang Xuejun Li College of Automation Nanjing University of Posts and Telecommunications

This paper mainly describes the omnidirectional walking motion design of humanoid robot soccer team called Apollo3 D. In this paper, we employed a model which is based on double linear inverted pendulum with a predictive control to generate a motion trajectory of the robot’s trunk in the premise of keeping dynamic balance of robots. Parameters for walk are optimized for maximum speed through an approach of Q-learning algorithm. With this walking skill, ultimately, we realized rapidly and stably omnidirectional walk of biped robot in complex and dynamic environment. Experimental results have revealed the effectiveness of the proposed design method in this paper.

关键词： Biped Robots Omnidirectional Walk Double Linear Inverted Pendulum Q-Learning Algorithm

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A partitioning-based task allocation strategy for Police Multi-Agents

A partitioning-based task allocation strategy for Police Mul...

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第26届中国控制与决策会议

作者： liang zhiwei YANG Xiang DENG Yao College of Automation Nanjing University of Posts and Telecommunications

RCRSS（RoboCup Rescue Simulation System, RCRSS） is a typical multi-agent system. In order to solve the task allocation problem for police multi-agents of this system, this paper presents a novel partitioning-based task allocation strategy. It is carried out through the use of clustering, namely the K-means clustering algorithm, to divide the map into several regions. Then the dynamic adjustment system with static assignment was adopted synthetically for the implementation. The experimental results show that the new task allocation strategy for the police can adapt to a variety of disaster environments and improve the efficiency of multi-agent collaboration.

关键词： RoboCup rescue Multi-agent Task allocation Cluster

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(ITO)_x(SiO2)_(1-x)纳米颗粒薄膜的电输运性质

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天津大学学报（自然科学与工程技术版） 2017年第8期50卷 862-867页

作者：李志青梁志伟天津大学理学院天津市低维材料物理与制备技术重点实验室天津300350

为了理解三维纳米颗粒薄膜体系中电子的跳跃传导行为,采用射频磁控溅射法在玻璃基片上制备了一系列不同Sn:In_2O_3(ITO)体积分数的三维(ITO)_x(SiO_2)_(1-x)纳米颗粒薄膜样品,对绝缘性样品在2~300,K温度范围内电导率与温度的关系进行了... 详细信息

为了理解三维纳米颗粒薄膜体系中电子的跳跃传导行为,采用射频磁控溅射法在玻璃基片上制备了一系列不同Sn:In_2O_3(ITO)体积分数的三维(ITO)_x(SiO_2)_(1-x)纳米颗粒薄膜样品,对绝缘性样品在2~300,K温度范围内电导率与温度的关系进行了系统研究.在低温区(<120,K),电导率与温度遵从lnσ■T^(-1/2)的关系,体系的电子输运机制符合Abeles等提出的跳跃传导模型,电子的输运以颗粒间的跳跃为主,颗粒库仑充电能主导着颗粒间电子的输运过程.而在高温区,体系的电子输运机制符合热涨落诱导的隧穿导电模型,热涨落电势主导着颗粒间电子的输运过程.

关键词：纳米颗粒薄膜电输运性质跳跃电导热涨落诱导隧穿

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A case of primary malignant fibrous histiocytoma of the pancreas with liver metastasis

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Oncology and Translational Medicine 2015年第6期1卷 261-263页

作者： Wenlong Zhai Jianwen Ye zhiwei liang Chuang Zhou Longshuan Zhao Department of Hepatobiliary and Pancreatic Surgery The First Affiliated Hospital of Zhengzhou University

Malignant fibrous histiocytoma(MFH) is one of most common types of soft-tissue sarcoma. However, it accounts for less than 1% of all human cancer types. In addition, primary MFH of the pancreas is very rare. Herein, we report of a 37-year-old man who presented with a pancreatic mass and did not show any specific symptoms. Pre-contrast computed tomography(CT) showed a heterogeneous, liquid-filled necrotic mass in the uncinate lobe of the pancreas. Contrast-enhanced CT showed a mild enhancement of solid components and the pancreaticoduodenal artery across the mass. The patient underwent a pancreaticoduodenectomy, ethanol ablation of the liver lesions, and chemotherapy with 4 cycles of ifosfamide and doxorubicin. The tumor recurred in the liver, but not in the pancreas, after 8 months.

关键词： malignant fibrous histiocytoma (MFH) pancreatic neoplasm metastatic liver cancer

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