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Experimental Study of Air Conditioning Unit of Evaporative Cooling Assisted Mechanical Refrigeration

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湖南大学学报（自然科学版） 2009年第S1期36卷 106-110页

作者： HUANG xiang,XU Fang-cheng,wu jun-mei(xi’an polytechnic University,xi’an,Shaanxi 710048,China) xi'an Polytechnic University Xi'an 710048 China

The evaporative cooling,which assists the refrigeration machinery air-conditioning systems test-rig,has been *** structure and working principle were described,and the performance test was conducted and *** test shows that making full use of the evaporative cooling "free cooling" in Spring and Autumn seasons can fully meet the requirements of air-conditioned comfort through the switch of the function in different *** into account the evaporative cooling fan and pump energy consumption,compared with the traditional mechanical refrigeration system,more than 80 percent of energy can be saved,and the energy efficiency ratio of the Unit(EER)is as high as *** the two stages of indirect evaporative cooling to pre-cool the new wind in summer,under the conditions of the same air supply temperature requirements,0.83 kg/s chilled water saved can be equivalent to the traditional mechanical refrigeration system,and when the new wind ratio up to 50 percent,more than 10 percent load was reduced in mechanical refrigeration *** overall EER increased about 35 percent.

关键词： evaporative cooling mechanical refrigeration air-conditioning unit EER

Climatic and geographic factors affect ecosystem multifunctionality through biodiversity in the Tibetan alpine grasslands

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Journal of Mountain Science 2017年第8期14卷 1604-1614页

作者： PAN Ying wu jun-xi LUO Li-ming TU Yan-li YU Cheng-qun ZHANG xian-zhou MIAO Yan-jun ZHAO Yan YANG jun-ling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Key Laboratory of Ecosystem Network Observation and Modelling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences Agricultural Research Institute Tibet Academy of Agricultural and Animal Sciences Tibet Plateau Institute of Biology Agricultural and Animal Husbandry College of Tibet University

Ecosystem multifunctionality(EMF), the simultaneous provision of multiple ecosystem functions, is often affected by biodiversity and environmental factors. We know little about how the interactions between biodiversity and environmental factors affect EMF. In this case study, a structural equation model was used to clarify climatic and geographic pathways that affect EMF by varying biodiversity in the Tibetan alpine grasslands. In addition to services related to carbon, nitrogen, and water cycling, forage supply, which is related to plantproductivity and palatability, was included in the EMF index. The results showed that 72% of the variation in EMF could be explained by biodiversity and other environmental factors. The ratio of palatable richness to all species richness explained 8.3% of the EMF variation. We found that air temperature, elevation, and latitude all affected EMF, but in different ways. Air temperature and elevation impacted the aboveground parts of the ecosystem, which included plant height, aboveground biomass, richness of palatable species, and ratio of palatable richness to all species richness. Latitude affected EMF by varying both aboveground and belowground parts of the ecosystem, which included palatable speciesrichness and belowground biomass. Our results indicated that there are still uncertainties in the biodiversity–EMF relationships related to the variable components of EMF, and climatic and geographic factors. Clarification of pathways that affect EMF using structural equation modeling techniques could elucidate the mechanisms by which environmental changes affect EMF.

关键词： Alpine grassland Biodiversity Structural equation model Tibetan Plateau

Multi-source data integration and multi-scale modeling framework for progressive prediction of complex geological interfaces in tunneling

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Underground Space 2024年第2期15卷 1-25页

作者： Jingxiao Wang Peinan Li xiaoying Zhuang xiaojun Li xi Jiang jun wu Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghai 200092China College of Environmental Science and Engineering Donghua UniversityShanghai 201620China Institute of Photonics Department of Mathematics and PhysicsLeibniz University HannoverHannover 30167Germany Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 100872China College of Civil Engineering Shanghai Normal UniversityShanghai 200233China

A reliable geological model plays a fundamental role in the efficiency and safety of mountain tunnel ***,regional models based on limited survey data represent macroscopic geological environments but not detailed internal geological characteristics,especially at tunnel portals with complex geological *** paper presents a comprehensive methodological framework for refined modeling of the tunnel surrounding rock and subsequent mechanics analysis,with a particular focus on natural space distortion of hard-soft rock interfaces at tunnel *** progressive prediction of geological structures is developed considering multi-source data derived from the tunnel survey and excavation *** improve the accuracy of the models,a novel modeling method is proposed to integrate multi-source and multi-scale data based on data extraction and potential field ***,a regional-scale model and an engineering-scale model are built,providing a clear insight into geological phenomena and supporting numerical *** addition,the proposed framework is applied to a case study,the Long-tou mountain tunnel project in Guangzhou,China,where the dominant rock type is *** results show that the data integration and modeling methods effectively improve model structure *** improved model’s calculation deviation is reduced by about 10%to 20%in the mechanical *** study contributes to revealing the complex geological environment with singular interfaces and promoting the safety and performance of mountain tunneling.

关键词： Mountain tunnel Geological modeling Multi-source data Progressive prediction Tunnel portals

彝医药金薄清咽颗粒制备工艺及对慢性咽炎模型大鼠的疗效机制

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川北医学院学报 2024年第7期39卷 865-869,912页

作者：吴伟吴俊汐耿福昌刘彬杨元素赵珊马跃张春兰凉山州中西医结合医院彝族医药研究所·消化内科四川西昌615000 好医生药业集团成都中医药大学医学与生命科学学院四川成都610000

目的:研究彝医药金薄清咽颗粒(JBQYG)的制剂工艺及其对慢性咽炎(CP)模型大鼠的改善机制。方法:选择最优辅料,进行成型工艺筛选和高效液相色谱法(HPLC)分析;用JBQYG干预CP大鼠,检测咽喉组织表观、病理、转录因子p65(NF-κB p65)蛋白表达... 详细信息

目的:研究彝医药金薄清咽颗粒(JBQYG)的制剂工艺及其对慢性咽炎(CP)模型大鼠的改善机制。方法:选择最优辅料,进行成型工艺筛选和高效液相色谱法(HPLC)分析;用JBQYG干预CP大鼠,检测咽喉组织表观、病理、转录因子p65(NF-κB p65)蛋白表达及炎性和氧化水平。结果:最优辅料为乳糖,成型工艺为:纯浸膏∶乳糖=8∶1、乙醇浓度95%、乙醇用量10%,制剂标准成分芍药苷稳定达标;JBQYG降低了CP大鼠咽喉NF-κB p65蛋白的磷酸化水平和,逆转了氨水诱导的炎性和氧化应激,从而改善了咽喉的表观和病理改变;且JBQYG较阿司匹林更有效地改善了氧化应激,差异有统计学意义(P<0.05)。结论:研究确定的制剂制备工艺合理;JBQYG通过降低NF-κB p65的磷酸化水平和提升总抗氧化能力,改善CP咽喉的炎性和氧化状态、表观及病理改变。

关键词：金薄清咽颗粒成型工艺慢性咽炎氧化应激转录因子p65 炎性反应彝族药物

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Therapeutic observation on lung-clearing and spleen-strengthening tuina in children with exogenous cough

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Journal of Acupuncture and Tuina Science 2020年第3期18卷 225-230页

作者： Chen Li wu xi-jun wuxi Hospital of Chinese Medicine Jiangsu 214000China

Objective:To observe the clinical efficacy of lung-clearing and spleen-strengthening tuina on exogenous cough in ***:A total of 77 children with exogenous cough that met the inclusion criteria were randomly divided into a treatment group and a control group according to the random number table,with 39 cases in the treatment group and 38 cases in the control *** routine lung-clearing manipulation was used in the two groups,while the spleen-strengthening manipulation was added in the treatment *** groups were treated once a day,5 times as a course of *** one course of treatment,the symptom score and clinical efficacy were ***:There were one dropout in the treatment group and 2 dropouts in the control ***,a total of 74 cases were finally included in the analysis,with 38 cases in the treatment group and 36 cases in the control *** treatment,there was a statistically significant difference in cough score between the two groups(P<0.05).There was a statistically significant difference in the score of poor appetite between the two groups(P<0.05).After treatment,the total effective rate was 89.5%in the treatment group versus 75.0%in the control group,showing a statistically significant difference(P<0.05).Conclusion:The therapeutic efficacy of lung-clearing spleen-strengthening manipulation is better than that of lung-clearing tuina manipulation alone for children with exogenous cough;regulating spleen and stomach can improve the curative efficacy of exogenous cough in children.

关键词： Tuina Massage Pediatric Tuina Cough Exogenous Diseases Clearing Lung Strengthening Spleen Child

Progress of Acupuncture and Tuina for Shoulder Joint Subluxation Following Apoplexy

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Journal of Acupuncture and Tuina Science 2008年第1期6卷 21-23页

作者：吴昔钧崔学军 Nanjing University of Traditional Chinese Medicine Jiangsu 210029P.R.China

The treatments of shoulder joint subluxation following apoplexy with acupuncture, tuina, acupoint injection, and comprehensive methods in recent 10 years were reviewed. By comparing and analyzing the clinical effects of different methods, acupuncture combing with rehabilitation therapy is considered as a satisfactory one in treating subluxation following apoplexy.

关键词： Poststroke Syndrome Cerebrovascular Disorder Shoulder Dislocation Acupuncture Therapy Tuina Massage Literature Review

Highly dispersive tetrahedral vanadium species on pure silica ZSM-12 zeolite boosting the selective oxidation of cyclohexane into cyclohexanone

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Science China Chemistry 2024年第7期67卷 2206-2214页

作者： Menglin xie Ting Li Chao wu xiaoling Liu Jinling Ni Siqin Yao Yu Zhou Shibo xi jun Wang State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Institute of Sustainability for Chemicals Energy and Environment(ISCE2)Agency for ScienceTechnology and Research(A*STAR)Singapore 627833Republic of Singapore College of Materials Science and Engineering Sichuan UniversityChengdu 610065China

The selective oxidation of cyclohexane is a promising green route for the production of KA oil(cyclohexanol and cyclohexanone),but remains a huge challenge to design high-performing heterogeneous catalysts under mild ***,a pure silica ZSM-12(MTW topology)zeolite was applied as the support to immobilize highly dispersive tetrahedrally coordinated vanadium(V)species and the constructed catalyst 1%V/SZ-12 exhibited high efficiency in the fast and selective oxidation of cyclohexane into cyclohexanone with H_(2)O_(2).The reaction completed within 30 s,affording the selectivity of 99%towards cyclohexanone and the extremely high turnover frequency(TOF)of 5,891 h^(-1).1%V/SZ-12 was facilely reused with stable activity and feasibly extended to the oxidation of various cyclohexane *** one-dimensional 12-membered ring microchannels contributed to the formation and accessibility of tetrahedrally coordinated high valent V5+species as the robust active centers,which activated H_(2)O_(2) to generate V–O–O·,the active oxygen species for the electrophilic attack on cyclohexane to produce cyclohexanone as the sole product.

关键词： zeolite metal doping cyclohexane oxidation heterogeneous catalysis

Parameter Estimation of Sub-/Super-synchronous Oscillation Based on Interpolated All-phase Fast Fourier Transform with Optimized Window Function

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1031-1041页

作者： Bo Sun xi wu xi Chen Zixiao Zou Qiang Li Bixing Ren School of Electrical Engineering Southeast UniversityNanjingChina State Grid Jiangsu Electric Power Company Limited Research Institute NanjingChina

In recent years,with increasing amounts of renew-able energy sources connecting to power grids,sub-/super-syn-chronous oscillations(SSOs)occurred more *** to the time-variant nature of SsO magnitudes and frequencies,as well as the mutual interferences among SsO modes with close frequencies,the accurate parameter estimation of SsO has be-come a particularly challenging *** solve this issue,this paper proposes an improved spectrum analysis method by im-proving the window function and a spectrum correction method to achieve higher ***,by aiming at the sidelobe characteristics of the window function as evaluation criteria,a combined cosine function is optimized using a genetic algorithm(GA).Furthermore,the obtained window function is self-con-volved to extend its excellent characteristics,which have better performance in reducing mutual interference from other SSO ***,a new form of interpolated all-phase fast Fourier transform(IpApFFT)using the optimized window func-tion is proposed to estimate the parameters of *** meth-od allows for phase-unbiased estimation while maintaining algo-rithmic simplicity and *** performance of the pro-posed method is demonstrated under various conditions,com-pared with other estimation *** results vali-date the effectiveness and superiority of the proposed method.

关键词： Sub-/Super-synchronous oscillation(SSO) window function parameter estimation interpolated all-phase fast Fourier transform(ApFFT)

First-principles study on the diffusion behavior of Cs and I in Cr coating

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Nuclear Science and Techniques 2024年第6期35卷 177-188页

作者： Shu-Ying Lin xiao-Jing Li Lin-Bing Jiang xi-jun wu Hui-Qin Yin Yu Ma Wen-Guan Liu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China School of Nuclear Science and Technology University of South ChinaHengyang 421001China

Cs and I can migrate through fuel-cladding interfaces and accelerate the cladding corrosion process induced by the fuel-cladding chemical *** coating has emerged as an important candidate for mitigating this chemical *** this study,first-principles calculations were employed to investigate the diffusion behavior of Cs and I in the Cr bulk and grain boundaries to reveal the microscopic interaction mitigation mechanisms at the fuel-cladding *** interaction between these two fission products and the Cr coating were studied systematically,and the Cs and I temperature-dependent diffusion coefficients in Cr were obtained using Bocquet’s oversized solute-atom model and Le Claire’s nine-frequency model,*** results showed that the Cs and I migration barriers were significantly lower than that of Cr,and the Cs and I diffusion coefficients were more than three orders of magnitude larger than the Cr self-diffusion coefficient within the temperature range of Generation-IV fast reactors(below 1000 K),demonstrating the strong penetration ability of Cs and ***,Cs and I are more likely to diffuse along the grain boundary because of the generally low migration barriers,indicating that the grain boundary serves as a fast diffusion channel for Cs and I.

关键词： First-principles calculation Fuel cladding chemical interaction Cr coating Fission product Diffusion Grain boundary