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Carbon emission impact on the operation of virtual power plant with combined heat and power system

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Frontiers of Information Technology & Electronic Engineering 2016年第5期17卷 479-488页

作者： Yu-hang XIA jun-yong LIU zheng-wen HUANG xu ZHANG School of Electrical Engineering and Information Sichuan UniversityChengdu 610065China Brunel Institute of Power Systems Brunel UniversityLondon UB8 3PHUK Guangzhou Power Supply Bureau Guangzhou 510000China

A virtual power plant （VPP） can realize the aggregation of distributed generation in a certain region, and represent distributed generation to participate in the power market of the main grid. With the expansion of VPPs and ever-growing heat demand of consumers, managing the effect of fluctuations in the amount of available renewable resources on the operation of VPPs and maintaining an economical supply of electric power and heat energy to users have been important issues. This paper proposes the allocation of an electric boiler to realize wind power directly converted for supplying heat, which can not only overcome the limitation of beat output from a combined heat and power （CHP） unit, but also reduce carbon emissions from a VPP. After the electric boiler is considered in the VPP operation model of the combined heat and power system, a multi-objective model is built, which includes the costs of carbon emissions, total operation of the VPP and the electricity traded between the VPP and the main grid. The model is solved by the CPLEX package using the fuzzy membership function in Matlab, and a case study is presented. The power output of each unit in the case study is analyzed under four scenarios. The results show that after carbon emission is taken into account, the output of low carbon units is significantly increased, and the allocation of an electric boiler can facilitate the maximum absorption of renewable energy, which also reduces carbon emissions from the VPP.

关键词： Virtual power plant (VPP) Carbon emissions Electric boiler Wind power Combined heat and power (CHP)

Bi_(2)WO_(6)/AgInS_(2)S-scheme heterojunction:Efficient photodegradation of organic pollutant and toxicity evaluation

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Journal of Materials Science & Technology 2024年第3期170卷 200-211页

作者： Yanyan Zhao xu Fan Hongxing zheng Enzhou Liu jun Fan xuejun Wang College of Biology Pharmacy and Food Engineering Shangluo UniversityShangluo 726000China QinLing-Bashan Mountains Bioresources Comprehensive Development C.I.C. Shaanxi University of TechnologyHanzhong 723001China School of Chemical Engineering Northwest UniversityXi’an 710069China

Constructing of heterojunction was identified as a feasible way to improve photocatalytic activity of *** this work,a n-p type Bi_(2)WO_(6)/AgInS_(2)S-scheme heterojunction was successfully prepared for organic pollutants *** Bi_(2)WO_(6)/AgInS_(2)S-scheme heterojunction exhibited much higher pho-tocatalytic activity towards Rhodamine B(92.24%,expose to visible light for 60 min),norfloxacin(81.73%,expose to visible light for 90 min)and levofloxacin(87.46%,expose to visible light for 90 min)than pure Bi_(2)WO_(6)and pure AgInS_(2).Toxicity analysis indicated the low environmental toxicity of Rhodamine B degradation intermediates for Rye seeds and Sudangrass seeds germination and *** study displayed that AgInS_(2)and Bi_(2)WO_(6)work as the primary photocatalyst to form·O_(2)−and ·OH,*** improved photocatalytic activity of the Bi_(2)WO_(6)/AgInS_(2)S-scheme heterojunction was due to the im-proved light response range and intensified carrier separation ***,a S-scheme charge transfer mechanism including multiple charge transfer channels was *** work could provide an effective strategy for organic pollutants degradation in wastewater.

关键词： Photocatalysis S-scheme heterojunction AgInS_(2) Bi_(2)WO_(6) Toxicity experiments

A catastrophic natural disaster chain of typhoon-rainstorm-landslide-barrier lake-flooding in Zhejiang Province, China

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Journal of Mountain Science 2021年第8期18卷 2108-2119页

作者： CUI Yu-long HU jun-hong xu Chong zheng jun WEI Jiang-bo School of Civil Engineering and Architecture Anhui University of Science and TechnologyHuainan232001China National Institute of Natural Hazards Ministry of Emergency Management of China(former Institute of Crustal DynamicsChina Earthquake Administration)Beijing100085China Department of Civil Engineering Zhejiang UniversityHangzhou310058China College of Geology and Environment Xi’an University of Science and TechnologyXi’an710054China

On August 10,2019,due to the effect of a rainstorm caused by Super Typhoon Lekima,a landslide occurred in Shanzao Village,*** blocked the Shanzao stream,forming a barrier lake,and then the barrier lake *** is a rare natural disaster chain of typhoon-rainstorm-landslide-barrier *** study was built on field surveys,satellite image interpretation,the digital elevation model(DEM),engineering geological analysis and empirical *** purpose was to reveal the characteristics and causes of the landslide,the features and formation process of the barrier lake and the dam break flooding *** results show that the volume of the landslide deposit is approximately 2.4×105 *** burst mode of the landslide dam is overtopping,which took only 22 minutes from the formation of the landslide dam to its *** dam-break peak flow was 1353 m3/s,and the average velocity was 2.8–3.0 m/*** study shows that the strongly weathered rock and soil slope has low strength and high permeability under the condition of heavy rainfall,which reminds us the high risk of landslides and the importance of accurate early warning of landslides under heavy rainfalls in densely populated areas of Southeast China,as well as the severity of the disaster chain of typhoon-rainstorm-landslide-barrier lake-flooding.

关键词： Natural disaster chain Landslide Barrier lake Dam break flood Typhoon Lekima

Time-Grating for the Generation of STUD Pulse Trains

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Chinese Physics Letters 2013年第4期30卷 85-87页

作者： zheng jun WANG Shi-Wei xu Jian-Qiu Key Laboratory for Laser Plasmas(Ministry of Education and Department of Physics Shanghai Jiao Tong UniversityShanghai 200240

Spike train of uneven duration or delay(STUD)pulses hold potential for laser-plasma interaction(LPI)control in laser *** technique based on time grating is applied to generate an STUD pulse *** grating,a temporal analogy of the diffraction grating,can control the pulse width,shape,and repetition rate easily through the use of electro-optical *** pulse width and repetition rate are given by the modulation frequency and depth of the phase modulation function in theory and numerical *** zero-chirped phase modulation is good for the compression effect of the time grating.A principle experiment of two pulses interfering is shown to verify the time grating function.

关键词： function. pulse repetition

Bayesian Inference of Nucleus Resonance and Neutron Skin

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原子能科学技术 2023年第4期57卷 729-742页

作者： xu jun School of Physics Science and Engineering Tongji UniversityShanghai 200092China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

In this proceeding,some highlight results on the constraints of the nuclear matter equation of state(EOS)from the data of nucleus resonance and neutron-skin thickness using the Bayesian approach based on the Skyrme-Hartree-Fock model and its extension have been ***,the anti-correlation and positive correlations between the slope parameter and the value of the symmetry energy at the saturation density under the constraint of the neutron-skin thickness and the isovector giant dipole resonance have been discussed ***’s shown that the Bayesian analysis can help to find a compromise for the“PREXII puzzle”and the“soft Tin puzzle”.The possible modifications on the constraints of lower-order EOS parameters as well as the relevant correlation when higher-order EOS parameters are incorporated as independent variables have been further *** a given model and parameter space,the Bayesian approach serves as a good analysis tool suitable for multi-messengers versus multi-variables,and is helpful for constraining quantitatively the model parameters as well as their correlations.

关键词： Bayesian inference nuclear matter equation of state nucleus resonance neutron-skin thickness

Hierarchical NiCo2O4 microspheres assembled by nanorods with p-type response for detection of triethylamine

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Chinese Chemical Letters 2020年第8期31卷 2077-2082页

作者： Chen Yang Yongshan xu Lingli zheng Yingqiang Zhao Wei zheng Xianghong Liu jun Zhang College of Physics Center for Marine Observation and CommunicationsQingdao UniversityQingdao 266071China College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJi'nan 250014China

The morphological and structural design provides an efficient protocol to optimize the performance of gas sensing *** this work,a gas sensor with high sensitivity for triethylamine(TEA)detection is developed based on p-type NiCo2 O4 hierarchical *** NiCo2 O4 microspheres,synthesized by a hydrothermal route,have a three-dimensional(3 D)urchin-like structure assembled by nanorod building *** structure-property correlation has been investigated by powder X-ray diffraction,X-ray photoelectron spectroscopy,transmission electron microscope,scanning electron microscope,N2 adsorption-desorption tests and comprehensive gas sensing *** influence of calcination temperature on the morphological structure and sensing performances has been *** reveal that the material annealed at 300℃has a very large specific surface area of 125.27 m2/g,thereby demonstrating the best TEA sensing properties including high response and low limit of detection(145 ppb),good selectivity and *** further increase of the calcination temperature leads to the collapse of the 3 D hierarchical structure with significantly decreased surface area,which is found to decline the sensing *** work indicates the promise of ternary p-type metal oxide nanostructures for application in highly sensitive gas sensors.

关键词： Microstructures NiCo2O4 Metal oxide p-type response Gas sensor

Landslides triggered by the 1970 Ms 7.7 Tonghai earthquake in Yunnan,China: an inventory, distribution characteristics, and tectonic significance

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Journal of Mountain Science 2022年第6期19卷 1633-1649页

作者： CUI Yu-long HU jun-hong xu Chong MIAO Hai-bo zheng jun School of Civil Engineering and Architecture Anhui University of Science and TechnologyHuainan 232001China National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing 100085China Department of Civil Engineering Zhejiang UniversityHangzhou 310058China

The 1970 Tonghai earthquake, which occurred on January 5, 1970, in Tonghai County, Yunnan Province, China, triggered a large number of landslides. Since the occurrence of the earthquake, there have been a huge number of research reports on the seismogenic structure and earthquake mechanism, but rare reports on the seismic landslides. As the largest earthquake recorded in the Qujiang fault zone, the study on the coseismic landslides triggered by this earthquake are of great significance to the prevention and mitigation of earthquake-induced landslides in this region. In this study, we established a coseismic landslide inventory for the VⅢ–X seismic intensity areas of the Ms 7.7 Tonghai earthquake, and conducted spatial analysis on the coseismic landslides, mainly having analyzed the effect of the topographic factors, geological factors, and seismic factors on the development of the coseismic landslides. To enhance the understanding of this earthquake, we converted the earthquake epicenter and magnitude with empirical formulas based on the distributions and areas of the coseismic landslides. Comparing with coseismic landslides in other earthquake-hit areas, we found the capability that this earthquake could induce landslides is low. This study provides a useful supplement to the global coseismic landslide inventories and could be the basic data for seismic landslide assessment in this earthquake-prone region.

关键词： 1970 Tonghai Ms 7.7 earthquake Coseismic landslides Landslide inventory Spatial analysis Tectonic significance

Strongly coupled N-doped carbon/Fe3O4/N-doped carbon hierarchical micro/nanostructures for enhanced lithium storage performance

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Journal of Energy Chemistry 2019年第7期28卷 43-51页

作者： Tian tian Ma Xianghong Liu Li Sun Yongshan xu Lingli zheng jun Zhang College of Physics Qingdao UniversityQingdao 266071ShandongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

A strong interface coupling is of vital importance to develop metal oxide/carbon nanocomposite anodes for next-generation lithium ion ***,a rational N-doped carb on riveting strategy is designed to boost the lithium storage performance of Fe3O4/N-doped carbon tubular *** pyrrole(PPy)has been used as the precursor for N-doped carbon.N-doped carbon-riveted Fe3O4/N-doped carbon(N-C@Fe3O4@N-C)nanocomposites were obtained by pyrolysis of PPy-coated FeOOH@PPy nanotubes in Ar *** tested as an anode for LIBs,the N-C@Fe3O4@N-C displays a high reversible discharge capacity of 675.8 mA h g-1 after 100 cycles at a current density of 100 mA g-1 and very good rate capability(470 mA h g_1 at 2 A g-1),which significantly surpasses the performance of Fe3O4@*** analysis reveals that after battery cycling the FeOx particles detached from the carbon fibers for Fe3O4@N-C,while for N-C@Fe3O4@N-C the FeOx particles were still trapped in the carbon matrix,thus preserving good electrical ***,the superior performance of N-C@Fe3C)4@N-C is attributed to the synergistic effect between Fe3O4 and N-doped carbon combined with the unique structure properties of the *** strategy reported in this work is expected to be applicable for designing other electrode materials for LIBs.

关键词： Iron oxide Micro/nanostructures Carbon tubes Anode Coupling

巨刺电针联合超前镇痛治疗初次单膝人工关节置换后疼痛

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中国组织工程研究 2025年第21期29卷 4529-4536页

作者：许明岚胡小雪沈军向峥张成波肖涟波上海中医药大学附属光华医院麻醉科上海市200052 上海中医药大学附属光华医院关节外科上海市200052 上海市中医药研究院中西医结合关节炎研究所上海市200052

背景:随着人工生物材料和手术技术的不断更新进步,人工膝关节置换已成为改善膝骨关节炎患者生活质量的首选方式。但是人工膝关节置换后疼痛剧烈,目前尚无较好的治疗措施。电针治疗是缓解疼痛的低成本选择,结合超前镇痛具有广泛应用前景... 详细信息

背景:随着人工生物材料和手术技术的不断更新进步,人工膝关节置换已成为改善膝骨关节炎患者生活质量的首选方式。但是人工膝关节置换后疼痛剧烈,目前尚无较好的治疗措施。电针治疗是缓解疼痛的低成本选择,结合超前镇痛具有广泛应用前景。目的:观察巨刺电针联合超前镇痛对膝骨关节炎患者初次行单侧人工膝关节置换后镇痛效果的影响。方法:采用随机对照设计,选择上海市光华中西医结合医院初次行单膝人工关节置换患者120例为研究对象,采用统计软件SPSS 25随机分为3组:超前电针组、术后电针组和假电针组,每组40例。超前电针组在术前1 d、麻醉诱导前30 min、术后1-3 d进行巨刺法电针治疗;术后电针组在术后1-3 d进行相同取穴和参数的治疗,术前1 d、麻醉诱导前30 min行假电针治疗;假电针组取相同穴位参数的5次假电针治疗。比较3组术后患者数字疼痛评分较术前改善情况、术中瑞芬太尼和丙泊酚使用量、患者术后首次使用静脉自控镇痛的时间、术后恶心呕吐例数、术后术侧大腿周径增加率和电针实施盲法成功率。结果与结论:(1)与超前电针组比较,术后第4天术后电针组和假电针组静息数字疼痛评分差值明显降低,术后第7天假电针组静息数字疼痛评分差值明显降低(P0.05);(3)与超前电针组比较,术后电针组和假电针组术中瑞芬太尼用量明显增加(P0.05);(8)人工膝关节假体具有良好的生物相容性。结果表明:巨刺电针结合超前镇痛可缓解术后急性疼痛,减少术中麻醉药量,延长术后补救镇痛时间,减轻术后不良反应,降低术后大腿周径增加率。

关键词：超前镇痛巨刺电针人工膝关节置换骨关节炎术后急性疼痛