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Nutrient concentration variations during Oenanthe javanica growth and decay in the ecological floating bed system

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Journal of Environmental Sciences 2010年第11期22卷 1710-1717页

作者： Xiaohong Zhou guoxiang wang School of the Environment Jiangsu University Zhenjiang 212013 China. Jiangsu Key Laboratory of Environmental Change and Ecological Construction College of Geographical Science Nanjing Normal University Nanjing 210046 China

The ecological floating bed system is a natural alternative to technical methods of wastewater treatment and involves complex processes induced by plants or microorganisms in the wastewater. This study aimed to identify nutrient concentration variations during Oenanthe javanica （Blume） DC growth and decay in the ecological floating bed system. Results showed that the third-order polynomial equation was suitable to describe pollutant concentration changes, showing that the effect of O. javanica ecological floating bed system on polluted water could be divided into the purification phase and decay phase. During the purification phase, nutrient concentrations rapidly decreased because O. javanica influenced water microbial communities and water physical parameters （i.e., dissolved oxygen, pH, and temperature）, and had a direct uptake of nutrients. However, during the decay phase, nitrogen and phosphorus concentrations in the plant tissues decreased, and these lost nutrients ultimately transferred to water and led to water quality deterioration. Results also showed that the uptake and storage of O. javanica in nutrients were temporary and the plant served only as media of the nutrients removed from the water. Under these circumstances, harvesting was an appropriate intervention to improve the treatment efficiency of O. javanica ecological floating bed system.

关键词： Oenanthe javanica ecological floating bed purification decay polluted water

Dual-phase competitive behavior in N-type Sn–Bi–Te thermoelectric films achieving high thermoelectric performance

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Progress in Natural Science:Materials International 2024年第4期34卷 795-802页

作者： Yingqi Chen guoxiang wang Yixiao Gao Laboratory of Infrared Materials and Devices The Research Institute of Advanced Technologies Ningbo University Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province

The dual-phase competitive behavior is introduced as an effective strategy to optimize the physical and chemical properties of N-type Bi2Te3thermoelectric（TE） materials. Controllable SnTe-embedded Bi2Te3nanocomposites can be synthesized with the addition of excessive Sn into Bi2Te3by tuning the crystallization behavior under proper thermal heating temperature. Notably, the precipitation temperature of Bi2Te3increases from 473 K for Sn20.9（Bi2Te3）79.1to 573 K for Sn34.4（Bi2Te3）65.6, expanding the controllable temperature span for the presence of SnTe phase. The second-phase nanoprecipitate SnTe can improve electrical conductivity by competing with the Bi2Te3phase, achieving an increase of four orders of magnitude at the critical temperature of ～500 K. Simultaneously, it increases the interfacial energy filtration effect between nanocrystalline grains, decoupling electrical parameters between conductivity and Seebeck coefficient. Consequently, the high power factor of ～147 μW/mK2at 650 K for optimized Sn26.6（Bi2Te3）73.4films can be obtained, which is more than twice that of the pure Bi2Te3material. Our work demonstrates a new physical mechanism to unravel the complicated structure-property relationship by dual-phase competitive behavior during phase transition. This study fills the gap in knowledge on the effects of the SnTe phase regarding the Bi2Te3system and provides guidance for the innovative design of high-performing inorganic thermoelectrics.

关键词： Bi2Te3 Thermoelectric properties Dual-phase Sn doped Magnetron sputtering

融合自适应采样与全局感知的图像深度估计算法

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计算机工程与应用 2025年第05期61卷 261-268页

作者：王国相李昌隆宋俊锋叶振金恒丽水学院浙江省特色文创产品数字化设计与智能制造重点实验室北京邮电大学信息与通信工程学院浙江大华技术股份有限公司

深度估计旨在通过少量稀疏深度样本点预测场景的稠密深度图，现有方法通常直接从稀疏深度样本生成最终的深度预测图，没有充分挖掘稀疏深度图包含的几何信息，导致深度估计算法的预测精度不够高。针对上述问题，提出一种融合自适应采样... 详细信息

深度估计旨在通过少量稀疏深度样本点预测场景的稠密深度图，现有方法通常直接从稀疏深度样本生成最终的深度预测图，没有充分挖掘稀疏深度图包含的几何信息，导致深度估计算法的预测精度不够高。针对上述问题，提出一种融合自适应采样与全局感知的图像深度估计算法，由粗粒度到细粒度逐步预测深度图。通过引入预训练的深度补全网络预测粗粒度的稠密深度图，获取丰富的场景结构信息和语义信息。设计自适应深度采样方法，引导算法模型对远处的区域施加更多关注，缓解深度数据的长尾分布问题。同时通过新设计的全局感知模块，捕获并融合多尺度特征，从而获取更多的场景上下文信息。在NYU-Depth-v2数据集上的实验结果表明，算法在整体性能上超越了其他方法；消融实验的结果验证了提出的各个模块的有效性；Zero-shot实验的结果表明算法有较好的泛化性能，其中在ScanNet数据集上的阈值精度指标δ<1.25相比P3D方法提升了42个百分点，相比S2D方法则提升了3.8个百分点。

关键词：深度估计深度补全稠密深度图多尺度特征融合自适应采样

STRONGLY CONTINUOUS INTEGRATED COSINE OPERATOR FUNCTIONS WITH GROWTHω

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Analysis in Theory and Applications 2007年第1期23卷 1-8页

作者： Meiying wang guoxiang Chen Department of Mathematics Nanjing Audit University Nanjing 210029 P. R. China

For a continuous increasing function ω ： [0, ∞） → （0, ∞） of finite exponetial type, we establish a Hille-Yosida type theorem for strongly continuous integrated cosine operator functions with O（ω）. It includ... 详细信息

关键词： cosine operator functions with growth ω generator generation theorem

MAXIMAL SUBSPACES FOR SOLUTIONS OF THE SECOND ORDER ABSTRACT CAUCHY PROBLEM

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Analysis in Theory and Applications 2007年第3期23卷 266-273页

作者： guoxiang Chen Meiying wang Department of Applied Mathematics Audit University Nanjing 210029P. R. China

For a continuous, increasing function ω ： R^＋ →R^＋／{0} of finite exponential type, this paper introduces the set Z（A, ω） of all x in a Banach space X for which the second order abstract differential equation （2） has a mild solution such that [ω（t）]^-1u（t,x） is uniformly continues on R^＋, and show that Z（A, ω） is a maximal Banach subspace continuously embedded in X, where A ∈ B（X） is closed. Moreover, A[z（A,ω） generates an O（ω（t）） strongly continuous cosine operator function family.

关键词： second order abstract cauchy problem solution with growth ω cosine operator function family

A new model of selective photothermolysis to aid laser treatment of port wine stains

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Chinese Science Bulletin 2013年第3期58卷 416-426页

作者： LI Dong HE YaLing wang guoxiang wang YongXian YING ZhaoXia State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Department of Mechanical Engineering The University of AkronAkron 44325-3903USA Department of Dermatology Medical School of Xi'an Jiaotong University

Pulsed dye lasers equipped with cryogen spray cooling(CSC) are now widely used to treat vascular malformation such as port wine stains(PWSs).This paper presents a new integrated model that can quantitatively simulate the cooling of the skin and the heating of the targeted blood vessels in PWSs during laser *** new model is based on the classical homogeneous multi-layer skin model that treats PWS-containing dermis as a mixture of dermal tissue and homogeneously distributed *** propagation in skin and PWSs is simulated by a Monte-Carlo method,which provides accurate description of the light scattering and absorption in the *** response of a targeted vessel in the new model is then obtained from the thermal analysis of a Krogh-unit that consists of the vessel and the surrounding dermal tissues and is buried in *** results from the multi-layer skin model provide appropriate laser influence input as well as the initial thermal condition for the micro-model of the Krogh-unit.A general dynamic relation is also introduced on the surface of skin to quantify the convective cooling of *** model is then applied to dye-laser treatment(wavelength of 585 nm) of PWSs with *** results demonstrate that the present model is able to quantify thermal response of a deeply buried blood vessel in PWSs as a discrete blood vessel does,with a more realistically estimate of the sheltering effect of the dermal tissue(scattering) and blood vessels(absorption) in front of the targeted *** understand the poor response of PWSs in clinic,the thermal characteristics of a targeted vessel was simulated under various *** effects of two morphological parameters,the vessel diameter and the burying depth of the vessel,are then systematically investigated under various pulse durations and fluences of laser.A threshold fluence for given vessel diameter and depth is then estimated quantitatively under the condition of the optimal laser pulse durat

关键词：激光治疗仪 Monte-Carlo方法鲜红斑痣脉冲持续时间激光能量密度热作用皮肤组织集成模型

Dual-phase coexistence enables to alleviate resistance drift in phase-change films

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Journal of Semiconductors 2024年第7期45卷 55-59页

作者： Tong Wu Chen Chen Jinyi Zhu guoxiang wang Shixun Dai Laboratory of Infrared Materials and Devices The Research Institute of Advanced TechnologiesNingbo UniversityNingbo 315211China Institute of Ocean Engineering Ningbo UniversityNingbo 315211China

The amorphous phase-change materials with spontaneous structural relaxation leads to the resistance drift with the time for phase-change neuron synaptic devices. Here, we modify the phase change properties of the conventional Ge_2Sb_2Te_5(GST) material by introducing an SnS phase. It is found that the resistance drift coefficient of SnS-doped GST was decreased from 0.06 to 0.01. It can be proposed that the origin originates from the precipitation of GST nanocrystals accompanied by the precipitation of SnS crystals compared to single-phase GST compound systems. We also found that the decrease in resistance drift can be attributed to the narrowed bandgap from 0.65 to 0.43 eV after SnS-doping. Thus, this study reveals the quantitative relationship between the resistance drift and the band gap and proposes a new idea for alleviating the resistance drift by composition optimization, which is of great significance for finding a promising phase change material.

关键词： phase change films X-ray methods resistance drift optical band gap

Synergistic interaction between redox-active electrolytes and functionalized carbon in increasing the performance of electric double-layer capacitors

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Journal of Energy Chemistry 2018年第4期27卷 1219-1224页

作者： guoxiang wang Mingyuan Zhang Hongfeng Xu Lu Lu Zuoyi Xiao Sa Liu School of Light Industry & Chemical Engineering Dalian Polytechnic University School of Electronics and Information Engineering Dalian Jiaotong University School of Chemistry and Materials Science Jiangsu Normal University

The increasing demand of high-performance supercapacitors has aroused great interest in developing specific capacitance and energy density. Active carbon （AC） has attracted much attention as a promising electrode material for electric double-layer capacitors （EDLCs）. Here, a facile strategy has been employed to fabricate high-performance EDLCs using the surface-oxygen functionalized active carbon （FAC） as an electrode and 2 M KOH with K3Fe（CN）6 as an electrolyte. In this system, K3Fe（CN）6 was used as a redox additive to enhance the performance of EDLCs. A 38.5% increase in specific capacitance （207.7 F g-1） was achieved compared with the KOH electrolyte without adding K3Fe（CN）G （152.9 F g-1）, due to the synergistic effects between oxygenic functional groups and redox electrolyte. These findings provide an alternative route to improve the performance of EDLCs, which are promising candidates for the broad applications of high-performance supercapacitors.

关键词： Functional carbon material Redox-active electrolytes Electrical double layer Supercapacitnr

Effect of light and nutrients on interspecific interactions between submerged macrophytes:implications for restoration of multispecies aquatic vegetation in eutrophic lakes

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Journal of Oceanology and Limnology 2023年第5期41卷 1821-1833页

作者： Yiping wang Xiaoguang XU Dujun LI Yongjun LU Xinhou ZHANG Chuyao YANG Qiu JIN guoxiang wang School of Water Resources and Hydropower Engineering Wuhan UniversityWuhan 430072China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research InstituteNanjing 210029China School of Environment Nanjing Normal UniversityNanjing 210023China

Constructing multispecies submerged vegetation systems and maintaining stable seasonal succession is crucial for restoring shallow eutrophic ***,little is known about the interactions between successional and existing species of different growth forms,particularly under the low light and high nutrient conditions of eutrophic *** measured the functional traits of mature Vallisneria natans(Lour.)Hara plants and Potamogeton crispus *** in monoculture and mosaic patterns under different light and nutrient *** effect of light on functional traits of the submerged macrophyte species was more significant than that of nutrients,but the reverse was true for *** biomass ***,interspecific interactions affected only the submerged macrophytes under the low light condition and varied with ***,the interaction of *** to *** was biased towards competition,while the interaction of *** to *** was converted from facilitation to competition by eutrophication,particularly in the homogenous mosaic growth *** study demonstrates that sufficient light is a prerequisite and patch planting is an effective means to form a multispecies submerged vegetation *** addition,we emphasize that the coexistence of eutrophication and low light will likely result in a competition between submerged macrophytes thus simplifying the vegetation,even if their growth forms and growing seasons are *** findings help explain the collapse of multispecies submerged vegetation and guide the restoration of aquatic plants in eutrophic lakes.

关键词： submerged macrophyte light nutrient monoculture mosaic interspecific interaction