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Integrating remote sensing and 3-PG model to simulate the biomass and carbon stock of Larix olgensis plantation

Forest Ecosystems 2024年第4期11卷 543-555页

作者： Yu Bai yong Pang Dan kong Key Laboratory of National Forestry and Grassland Administration on Forestry Remote Sensing and Information System Institute of Forest Resource Information

Accurate estimations of biomass and its temporal dynamics are crucial for monitoring the carbon cycle in forest ecosystems and assessing forest carbon sequestration *** studies have shown that integrating process-based models(PBMs)with remote sensing data can enhance simulations from stand to regional scales,significantly improving the ability to simulate forest growth and carbon stock ***,the utilization of PBMs for large-scale simulation of larch carbon storage distribution is still *** this study,we applied the parameterized 3-PG(Physiological Principles Predicting Growth)model across the Mengjiagang Forest Farm(MFF)to make broad-scale predictions of the biomass and carbon stocks of Larix olgensis *** model was used to simulate average diameter at breast height(DBH)and total biomass,which were later validated with a wide range of observation data including sample plot data,forest management inventory data,and airborne laser scanning *** results showed that the 3-PG model had relatively high accuracy for predicting both DBH and total biomass at stand and regional scale,with determination coefficients ranging from 0.78 to *** on the estimation of total biomass,we successfully produced a carbon stock map of the Larix olgensis plantation in MFF with a spatial resolution of 20 m,which helps with relevant management *** findings indicate that the integration of 3-PG model and remote sensing data can well predict the biomass and carbon stock at regional and even larger *** addition,this integration facilitates the evaluation of forest carbon sequestration capacity and the development of forest management plans.

关键词： 3-PG model Larch Biomass Carbon stock ALS

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Electrochemical polymerization of 2,6-pyridinediamine and characterization of the resulting polymer

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Chinese Chemical Letters 2012年第11期23卷 1311-1314页

作者： Shi Ping Luo Qing Xin Liu Zhong Liu Ai Juan Xie yong kong Xin Dai Institute of Petrochemical Technology Changzhou UniversityChangzhou 213164China Science and Technology Department Changzhou College of Information TechnologyChangzhou 213164China

Electrochemical synthesis of poly（2,6-pyridinediamine）（PPa） in aqueous sodium hydroxide solution has been carried out by using cyclic voltammetry for the first time. The scanning electron microscopy （SEM） revealed the interpenetrating network structure of the as-prepared PPa film, which makes it possible that anions can be doped into the polymer in the oxidation process, and vice versa in the reduction process. The results from FT-IR spectrum provided a possible polymerization mechanism of 2,6- pyridinediamine.

关键词： 2,6-Pyridinediamine Electrochemical polymerization Cyclic voltammetry SEM b'T-IR

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One-step synthesis of MnO_2 doped poly(aniline-co-o-aminophenol)and the capacitive behaviors of the conducting copolymer

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Chinese Chemical Letters 2015年第11期26卷 1367-1370页

作者： Xiu-Ying Hu Qing-Xin Liu Di Ma Zhong Liu yong kong Huai-Guo Xue School of Chemical and Environmental Engineering Jiangsu University of Technology Science and Technology Department Changzhou College of Information Technology Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Changzhou University School of Chemistry and Chemical Engineering Yangzhou University

MnO2 was doped into a conducting copolymer, poly（aniline-co-o-aminophenol）（PANOA）, via a one-step process during the chemical oxidative polymerization. The doping of MnO2 could enhance the electrochemical activity and reversibility of the copolymer. When used as the electrode materials of a supercapacitor, the capacitive behaviors of the as-prepared PANOA-MnO2 were superior to those of pure PANOA, especially at high potential scan rate and high charge-discharge current density. The MnO2 doped copolymer also had an excellent cyclic performance.

关键词： Conducting copolymerMnO2 One-step synthesisSupercapacitor

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Temperature prediction model in multiphase flow considering phase transition in the drilling operations

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Petroleum Science 2024年第3期21卷 1969-1979页

作者： Yang Zhang yong-An Li Xiang-Wei kong Hao Liu Teng-Fei Sun College of Mechanical and Electrical Engineering Beijing University of Chemical TechnologyBeijing 100027China School of Petroleum Engineering Yangtze UniversityWuhan430000HubeiChina

The study considers gas compression properties,gas slippage,back pressure(BP),phase transition(PT),well depth,and differences in gas-liquid physical properties.A new temperature model for multiphase flow is proposed by considering phase transition in the drilling *** mathematical model of multiphase flow is solved using the finite difference method with annulus mesh division for grid nodes,and a module for multiphase flow calculation and analysis is *** results indicate that the temperature varies along the annulus with the variation of gas influx at the bottom of the *** the process of controlled pressure drilling,as gas slips along the annulus to the wellhead,its volume continuously expands,leading to an increase in the gas content within the annulus,and consequently,an increase in the pressure drop caused by gas *** temperature increases with the increase in BP and decreases in gas influx rate and wellbore *** gas influx,the thermal conductivity coefficient for the gas-drilling mud two phases is significantly weakened,resulting in a considerable change in temperature along the *** the context of MPD,the method of slightly changing the temperature along the annulus by controlling the back pressure is feasible.

关键词： Managed pressure drilling Phase transition Temperature Gas-drilling mud two phase

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Impact of H_(2)S on Hg^(0)capture performance over nitrogen-doped carbon microsphere sorbent:experimental and theoretical insights

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Frontiers of Chemical Science and Engineering 2024年第3期18卷 89-100页

作者： Guopei Zhang Xiaoyang Zhang Xiangwen Xing Xiangru kong Lin Cui Dong yong National Engineering Laboratory for Reducing Emissions from Coal Combustion Shandong UniversityJinan250061China Bingtuan Energy Development Institute Shihezi UniversityShihezi832000China

A nitrogen-doped carbon microsphere sorbent with a hierarchical porous structure was synthesized via aggregation-hydrothermal *** Hg^(0)adsorption performance of the nitrogen-doped carbon microsphere sorbent was tested and compared with that of the coconut shell activated carbon prepared in the *** effect of H_(2)S on Hg^(0)adsorption was also *** nitrogen-doped carbon microsphere sorbent exhibited superior mercury removal performance compared with that of coconut shell activated *** the absence of H_(2)S at a low temperature(≤100℃),the Hg^(0)removal efficiency of the nitrogen-doped carbon microsphere sorbent exceeded 90%.This value is significantly higher than that of coconut shell activated carbon,which is approximately 45%.H_(2)S significantly enhanced the Hg^(0)removal performance of the nitrogen-doped carbon microsphere sorbent at higher temperatures(100–180℃).The hierarchical porous structure facilitated the diffusion and adsorption of H_(2)S and Hg^(0),while the nitrogen-containing active sites significantly improved the adsorption and dissociation capabilities of H_(2)S,contributing to the generation of more active sulfur species on the surface of the nitrogen-doped carbon microsphere *** formation of active sulfur species and HgS on the sorbent surface was further confirmed using X-ray photoelectron spectroscopy and Hg^(0)temperature-programmed desorption *** functional theory was employed to elucidate the adsorption and transformation of Hg^(0)on the sorbent surface.H_(2)S adsorbed and dissociated on the sorbent surface,generating active sulfur species that reacted with gaseous Hg^(0)to form HgS.

关键词： nitrogen-doped carbon microsphere H_(2)S Hg^(0)removal adsorption mechanism

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基于虚拟现实的师范生教学技能实训系统的设计与实现

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数字教育 2024年第2期10卷 24-32页

作者：亓建芸刘冠玲伦志君孔勇赵可云曲阜师范大学管理学院山东日照276826 曲阜师范大学传媒学院山东日照276826

提升师范生教学技能水平是师范院校教师教育工作的核心。运用虚拟现实技术能为师范生提供沉浸式训练环境,提高实践教学的效果,已成为促进师范生教学能力发展的新路径。文章立足虚拟现实技术于师范生教学技能实训的适恰性,以体验式学习... 详细信息

提升师范生教学技能水平是师范院校教师教育工作的核心。运用虚拟现实技术能为师范生提供沉浸式训练环境,提高实践教学的效果,已成为促进师范生教学能力发展的新路径。文章立足虚拟现实技术于师范生教学技能实训的适恰性,以体验式学习理念为支撑,设计了基于虚拟现实的师范生教学技能实训系统方案与实现流程,并在实践中进行了试用检验。结果表明:学习者沉浸体验良好,虚拟实训系统能够支持学习者自主学习,能有效促进师范生实践性知识的获取与实战能力的提升。

关键词：虚拟现实师范生教学技能实训系统体验式学习

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基于天然多糖的刺激响应型药物控释系统研究进展

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常州大学学报（自然科学版） 2024年第3期36卷 59-70页

作者：孔泳梁政崟芮倩李尚基盛焱山高俊常州大学石油化工学院江苏常州213164 常州市中医医院骨伤科江苏常州213003

刺激响应型药物控释系统一般以天然多糖生物大分子或其衍生物作为载体,通过化学结合或物理吸附等方式负载药物分子。具有刺激响应功能的天然多糖生物大分子或其衍生物能够感知其所处环境的变化,并由于其物理或化学性质的变化而做出应激... 详细信息

刺激响应型药物控释系统一般以天然多糖生物大分子或其衍生物作为载体,通过化学结合或物理吸附等方式负载药物分子。具有刺激响应功能的天然多糖生物大分子或其衍生物能够感知其所处环境的变化,并由于其物理或化学性质的变化而做出应激响应,因此可在不同环境或条件的刺激下,通过药物与载体之间化学键断裂或载体自身降解等方式将药物从载体中释放,从而实现药物的控制释放。结合课题组的研究工作,介绍了常用的刺激方式,包括单一刺激和多重刺激、外源性刺激和内源性刺激,为开发新型刺激响应型药物控释系统提供了思路。

关键词：刺激响应型天然多糖药物控释系统刺激方式

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Synthesis,Structure and Characterization of a New Silicophosphate,K_(2)SiP_(4)O_(13),with a Six-fold Coordinated Si

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Chinese Journal of Structural Chemistry 2021年第2期40卷 256-263,148页

作者： SUN Tong-Qing WANG Qian-Qian kong yong-Fa XU Jing-Jun School of Physics and the MOE Key Laboratory of Weak-light Nonlinear Photonics Nankai UniversityTianjin 300071China

A potassium silicophosphate,K2SiP4O13,has been synthesized in molten polyphosphoric *** crystalizes in the triclinic space group P1^(-)(No.2)with a=4.8327(10),b=7.7403(15),c=14.485(3)Å,a=82.29(3)°,β=83.31(3)°,γ=81.95°,V=529.02(19)Å^(3),Z=*** crystallographic structure features 2D layers of[SiP_(4)O_(13)]_(∞)in the ab plane with counter cations K^(+)residing among the layers,and the anionic framework of[SiP_(4)O_(13)]_(∞)is composed of six-fold coordinated Si atoms and tetraphosphate anions by sharing vertex O *** title compound was characterized by powder X-ray diffraction,IR and Raman spectroscopies,UV-vis diffuse reflectance spectroscopy,thermogravimetry and differential scanning calorimetry.

关键词： synthesis silicophosphate SiO_(6)octahedral coordination crystal structure

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Neonatal outcomes of very preterm infants from a neonatal intensive care center

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世界儿科杂志:英文版 2014年第1期10卷 53-58页

作者： Wei-Qin Zhou Ya-Bo Mei Xiao-Ying Zhang Qiu-Ping Li Xiang-yong kong Zhi-Chun Feng Department of Pediatrics BaYi Children's Hospital Affiliated to the Clinical Medical College of the General Hospital of Beijing Military RegionSouthern Medical UniversityBeijingChina

Background:Information about clinical outcomes of very preterm(VPT)infants in tertiary neonatal intensive care unit(NICU)setting is scant in *** study aimed to investigate the mortality and morbidity of VPT infants admitted to BaYi Children’s Hospital,which serves as a NICU referral center for the city of Beijing,***:Retrospectively collected perinatal/neonatal data on all admissions of infants born at<32 weeks of gestational age and subsequently admitted to the VPT-NICU from clinical records between October 2010 and September ***:Totally 729 infants were identified.90%of VPT infants were *** overall survival of the infants to discharge was 92%,which increased with increasing gestational age(range from 69%at<28 weeks to 99%at 31 weeks).The incidence of bronchopulmonary dysplasia was 4%,retinopathy of prematurity requiring treatment 2%,intraventricular hemorrhage III-IV 6%,and periventricular leukomalacia 2%.10%of the VPT infants had a major morbidity at ***:The outcomes of the VTP infants at this referral NICU were comparable to those in tertiary centers in developed *** most common complications were lower than those in other ***,high-volume NICU may minimize the adverse effects of VPT infants’transport.

关键词： morbidity mortality transport very preterm

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Improved outcomes of transported neonates in Beijing:the impact of strategic changes in perinatal and regional neonatal transport network services

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World Journal of Pediatrics 2014年第3期10卷 251-255页

作者： Xiang-yong kong Xiu-Xiang Liu Xiao-Yang Hong Jing Liu Qiu-Ping Li Zhi-Chun Feng Newborn Care Center Bayi Children's Hospitalthe Military General Hospital of Beijingthe People's Liberation ArmyBeijing 100700China Department of Pediatrics Hospital of Binzhou Medical UniversityBinzhouShandongChina

Background:Infants born outside perinatal centers may have compromised outcomes due to the transfer speed and effi ciency to an appropriate tertiary *** study aimed to evaluate the impact of regional coordinated changes in perinatal supports and retrieval services on the outcome of transported neonates in Beijing,***:Information about transported newborns between phase 1(July 1,2004 to June 30,2006)and phase 2(July 1,2007 to June 30,2009)was *** strategic changes during phase 2 included standardized neonatal transport procedures,skilled attendants,a perinatal consulting service,and preferential admission of transported neonates to the intensive care unit of the tertiary care *** from phase 2(after-strategic changes)were compared with those of phase 1(the period of pre-strategic changes)after a 12-month washout period,especially regarding the reduction in mortality and selected ***:There was a large increase in the number of transported infants in phase 2 compared with phase 1(2797 vs.567 patients).The average monthly rate of increase of transported infants was 383.3%(from 24 infants per month to 116 infants per month).The mortality rate of transported neonates reduced significantly from phase 1 to phase 2(5.11%vs.2.82%;P=0.005),particularly for preterm infants(8.47%vs.4.34%;P=0.006).In addition,transported neonates during phase 2 had signifi cantly decreased ***:Regional coordinated strategies optimizing the perinatal services and transport of outborn sick and preterm infants to tertiary care centers improved survival outcomes *** findings have vital implications for health outcomes and resource planning.

关键词： morbidity mortality neonatal transport network outcome

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