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Biomineralized nanoparticles for the immobilization and degradation of crude oil-contaminated soil

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Nano Research 2023年第10期16卷 12238-12245页

作者： Daoqing liu Qianwei Li Enhui liu Miao Zhang jicheng liu Chunmao Chen Key Laboratory of Water and Sediment Sciences(Ministry of Education) College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Heavy Oil Processing State Key Laboratory of Petroleum Pollution ControlChina University of Petroleum(Beijing)Beijing 102249China

Accidental oil leaks and spills often cause server soil pollution,and in situ remediation is a powerful and economical treatment *** during in situ remediation process,unpredicted migration of petroleum hydrocarbon in heterogeneous soil will lead to a long-term source of persistent aquifer *** reduce the migration of petroleum hydrocarbon and effectively improve the in situ remediation efficiency,herein,fungal biomineralization strategy was proposed for the immobilization of petroleum contaminants.A ureolytic fungi strain with crude oil-degradation ability was screened and identified as Chaetomium *** incubated in medium containing Ca2+and crude oil,a mineral corona with spiny nanoparticles was formed at the edge of oil and the interface characters were analyzed using fluorescent pH and dissolved oxygen(DO)sensing films,*** indicated that biominerals preferred to aggregate around the edge of crude oil,providing favorable microenvironment for fungal growth and then leading to the increase of pH in the microenvironment,eventually accompanied by the formation of mineral *** mineral corona with numerous nanoparticles may act as a solid and stable shell,limiting or reducing the mobility of crude oil,and providing enough time for fungal *** 28 days incubation,oilcontaminated soil treated with fungal biomineralization showed better immobilization ability for total petroleum hydrocarbon(TPH)under simulated acid-rain condition and higher TPH removal *** is the first demonstration for the immobilization of oil through fungal biomineralized nanoparticles,thus providing a novel strategy for the in situ remediation of oilcontaminated sites.

关键词： biomineralization degradation nanomineral nanoaggregates immigration

Reliability Growth Test Planning and Verification of Commercial Vehicles

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Automotive Innovation 2019年第4期2卷 328-337页

作者： liu jicheng Huang Liyan Zhou Renmin Markus Volmer Beiqi Foton Motor Co. Ltd.Beijing 102206China

Reliability and durability are two important technical indicators in automobile research and development.A research-and-design and testing organization can increase inherent quality attributes by adopting a systematic approach based on statistical tools and clearly defined *** process affects the design phase,validation through testing,and quality assurance in *** the basis of reliability growth theory and the Duane model,this study established an estimation method for the definition of the target mileage and specific test cycles in reliability growth testing.A construction method for defin-ing test conditions was proposed that adopts the theory of the design of *** simulation was conducted under a variety of typical test conditions including differing operation times,loads,and logistics modes to predict customer use and detect *** cases were then analyzed in *** the same time,a reliability growth prediction model was established on the basis of the initial test data and used for test process tracking and risk control.

关键词： Reliability Duane model Reliability growth prediction model Failure rate

An Improved Group Decision-Making Model for the Investment Options of Small-Scale Photovoltaic Systems Based on Cumulative Prospect Theory and Choquet Integral

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Wuhan University Journal of Natural Sciences 2019年第6期24卷 515-518页

作者： liu jicheng FU Xiaoxu XU Fangqiu WANG Zhenzhen LUO Cuicui School of Economics and Management North China Electric Power UniversityBeijing 102206China Beijing Key Laboratory of New Energy and Low-Carbon Development North China Electric Power UniversityBeijing 102206China Department of Mathematics University of TorontoToronto M5S 1A1ONCanada

With the development of photovoltaic(PV) industry, installing small-scale PV systems which are integrated into the buildings becomes popular. Therefore, it is important to make optimal investment decisions for investors and consumers. This paper proposes an improved group decision-making method which integrates the cumulative prospect theory and Choquet integral for the investment options of small-scale PV systems. From the perspective of sustainability, the alternatives are evaluated by four criteria, including economic benefits, solar energy condition, carbon emissions and social benefits. Since the performances of criteria are given by decision makers as linguistic variables, the proposed method measures the criteria values by intuitionistic trapezoidal fuzzy numbers. Then the alternatives are evaluated and ranked to determine the optimal option. Finally, the proposed method is implemented in a case study to illustrate its feasibility and effectiveness.

关键词： investment options small-scale photovoltaic systems cumulative prospect theory Choquet integral intuitionistic trapezoidal fuzzy numbers

D_∞-APPROXIMATION OF PRODUCT VARIATIONS OF TWO PARAMETER SMOOTH SEMIMARTINGALES

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Acta Mathematica Scientia 2004年第2期24卷 235-246页

作者：刘继成 DepartmentofMathematics tIuazhongUniversityofScienceandTechnologyWuhan430074China

Let X be a two parameter smooth semimartingale and (?) be its process of the product variation. It is proved that (?) can be approximated as D_∞-limit of sums of its discrete product variations as the mesh of division tends to zero. Moreover, this result can be strengthen to yield the quasi sure convergence of sums by estimating the speed of the convergence.

关键词： Malliavin calculus D_∞-Approximation two parameter smooth semimartingale product variation quasi sure

ANALYSIS OF REGIONAL ECONOMY GROWTH WITH THE THEORY OF DIFFERENTIAL SYSTEM DYNAMICS

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Journal of Systems Science & Complexity 2003年第4期16卷 541-549页

作者： XU Jiuping liu jicheng (School of Business and Administration, Sichuan University, Chengdu 610065, China) School of Business and Administration Sichuan University Chengdu 610065

In order to describe the interrelation forces among different regions during the economic growth, this paper introduces and analyzes the dynamical system model with the theory of differential systems dynamics. A pract... 详细信息

关键词： differential systems dynamics interrelation population migration

The Use of Some of the Information Criterion in Determining the Best Model for Forecasting of Thalassemia Cases Depending on Iraqi Patient Data Using ARIMA Model

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Journal of Applied Mathematics and Physics 2017年第3期5卷 667-679页

作者： Rana Sabeeh Abbood Alsudani jicheng liu School of Mathematics and Statistics Huazhong University of Science and Technology Wuhan China School of Mathematics College of Basic Education Maysan University Maysan Iraq

Thalassemia is a major health problem in Iraq, and despites a prevention programme. There has been no decrease in the prevalence of the disease, due to a lack of awareness, implying that genetic counseling was a failure. This failure has been attributed to a lack of recognition of problems related to Thalassemia, unorganised teamwork and services, lack of knowledge and insufficient numbers of extension workers, lack of Thalassemia support groups, and inadequate research in Thalassemia prevention and control. Autoregressive Integrated Moving Average (ARIMA) model and forecasting has become a major tool in different applications. The ARIMA model introduced by Box and Jenkins (1971) is among the most effective approaches for analysing time-series data. In this study, we used Box and Jenkins methodology to build an ARIMA model to forecast the number of people with Thalassemia, for the period from 2016-2018, from the data base from Maysan Health Center specific for Thalassemia the Maysan Provence, Iraq. After the model selection, the best model for forecasting was ARIMA (0, 1, 1) and of models were used for forecasting Thalassemia.

关键词： Thalassemia The Information Criterion Box-Jenkins Methodology

地表蒸散的遥感估算模型及其在农业干旱监测中的应用

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生态学杂志 2011年第4期30卷 837-844页

作者：郑有飞陈鹏吴荣军 Xiwu Zhan Christopher Hain jicheng liu 江苏省大气环境监测与污染控制高技术研究重点试验室南京210044 南京信息工程大学环境科学与工程学院南京210044 The Center for Satellite Applications and Research (STAR) National Environmental Satellite Data and Information Serv-ice (NESDIS) NOAA USA

蒸散是地表水热交换的主要过程,其空间特征差异明显,而遥感技术的发展与应用使得区域蒸散估算成为现实。本文介绍了基于能量平衡法的单层与双层遥感蒸散模型,并对这2类遥感模型的优缺点分别进行了评述和比较。重点综述了近年来得到发展... 详细信息

蒸散是地表水热交换的主要过程,其空间特征差异明显,而遥感技术的发展与应用使得区域蒸散估算成为现实。本文介绍了基于能量平衡法的单层与双层遥感蒸散模型,并对这2类遥感模型的优缺点分别进行了评述和比较。重点综述了近年来得到发展和应用的大气-陆地交换反演模型(ALEXI),阐述其主要结构、特色和过程。该模型通过耦合双层能量平衡模型(TSEB)和简化边界层模型,减少以往模型对台站气象数据的依赖,明显提高区域蒸散估算精度。研究表明,基于该模型的蒸散胁迫指数(ESI)具有很强的区域干旱监测能力。在今后研究中,多元遥感数据融合技术、陆面数据同化系统与遥感蒸散模型的结合将成为该领域的研究热点。

关键词：蒸散遥感能量平衡 ALEXI模型干旱监测

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新型轮腿机器人步态规划策略

中国机械工程 2019年第18期30卷 2257-2262页

作者：刘吉成季洪超上海大学机电工程与自动化学院

设计了一种新型步态可切换轮腿机器人。该机器人步态切换机理易于实现且不存在冗余机构,驱动系统置于封闭空间内,可在两栖环境下应用。基于模型控制步态的策略,规划了轮腿机器人的足端轨迹;利用运动学模型分析求解出各关节变量,对步态... 详细信息

设计了一种新型步态可切换轮腿机器人。该机器人步态切换机理易于实现且不存在冗余机构,驱动系统置于封闭空间内,可在两栖环境下应用。基于模型控制步态的策略,规划了轮腿机器人的足端轨迹;利用运动学模型分析求解出各关节变量,对步态控制策略进行研究,并利用实验样机验证了基于足端轨迹规划的机器人步态控制策略的可行性。

关键词：轮腿机器人足端轨迹规划轮腿步态切换步态控制机器人运动学

Research on Geodesic Active Contour Model for Fast Robust Segmentation of Complex Image

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Research on Geodesic Active Contour Model for Fast Robust Se...