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Application of thermally stimulated acoustic emission method to assess the thermal resistance and related properties of coals

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International Journal of Mining Science and Technology 2018年第2期28卷 243-249页

作者： e.A.Novikov R.O.Oshkin V.L.Shkuratnik S.A.epshtein N.N.Dobryakova National University of Science and Technology(MISiS) Moscow 119049Russia

Traditional methods of coal thermal resistance characterization are informative but considerably timeconsuming and require utilization of a complex and expensive equipment. This limits the effectiveness of their application. In this paper, authors experimentally investigated potential application of thermally stimulated acoustic emission method for developing of relatively simple and rapid coals thermal resistance assessment method. Features of thermally stimulated acoustic emission of anthracite, lignites and bituminous coal samples subject to cyclic thermal loading have been experimentally *** the first time, it has been shown that there exists a relationship of such patterns with structural parameters and properties of the coal samples, as well as their thermal resistance. The results indicate the possibility of applying the method of thermally stimulated acoustic emission to control processes of cryogenic disintegration and thermal resistance of fossil coals. The description of the equipment and methodological support needed for the implementation of this method have been provided.

关键词： Acoustic emission Fossil coal Thermal resistance Cryogenic disintegration Structure Properties

Recycling of spent lithium-ion batteries as a sustainable solution to obtain raw materials for different applications

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Journal of energy Chemistry 2023年第4期79卷 118-134页

作者： V.M.Leal J.S.Ribeiro e.L.D.Coelho M.B.J.G.Freitas Federal University of espírito Santo Department of ChemistryLaboratory of Electrochemistry and ElectrochemistryAv.Fernando Ferrari514VitóriaES 29075-910Brazil

Lithium-ion batteries(LIBs)containing graphite as anode material and LiCoO_(2),LiMn_(2)O_(4),and LiNi_(x)Mn_(y)Co_(z)O_(2) as cathode materials are the most used worldwide because of their high energy density,capacitance,durability,and ***,such widespread use implies the generation of large amounts of electronic *** is estimated that more than 11 million ton of LIBs waste will have been generated by *** recycling can contribute to minimizing environmental contamination and reducing production costs through the recovery of high-value raw materials such as lithium,cobalt,and *** most common processes used to recycle spent LIBs are pyrometallurgical,biometallurgical,and *** the current scenario,it is necessary to develop environmentally friendly methods to recycle batteries and synthesize materials with multiple technological *** study presents a review of industrial and laboratory processes for recycling spent LIBs and producing materials that can be used in new batteries,energy storage devices,electrochemical sensors,and photocatalytic reactions.

关键词： Li-ion batteries Recycling Cathode Battery Hydrometallurgical Pyrometallurgical

FasL eXPReSSION IN HUMAN COLON CARCINOMAS

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Chinese Journal of Cancer Research 2002年第1期14卷 37-41页

作者：邢宝才王怡 S Wimmenauer e H Farthmann 黄信孚 Department of Surgical Oncology Beijing Cancer Hospital Peking University School of Oncology Beijing 100036 China Department of Surgery University Hospital of Freiburg Freiburg Germany

Objective: The Fas and Fas ligand (FasL) play an important role in maintaining immune privilege on malignant tumors. In present study, we investigated the expression of FasL in SW480 and LS174 human colon carcinoma cell lines and twenty primary colon carcinoma specimens. Methods: The expression of FasL in human colon carcinoma cell lines and primary colon carcinomas specimens was detected by immunohistochemistry and Reverse Transcription-PCR (RT-PCR). Results: We found that all of detected human colon carcinoma cell lines and primary colon carcinoma specimens constitutively expressed FasL at the mRNA and protein level. However, the expression of FasL was not found in normal colon epithelial cells. Conclusion: The expression of FasL may occur during malignant transformation from normal colon epithelial cells to colon carcinoma cells. Our results suggest that tumor cells kill cytotoxic T lymphocytes (CTLS) and natural killer (NK) cells by expression of FasL. It may be a new mechanism for tumor cells to escape the host’s immune surveillance. The expression of FasL may contribute to the formation of colon carcinomas.

关键词： Colon carcinoma FasL Immune evasion

A diagnosis with a twist:Ultrasonographic sensitivity and predictors of pediatric ovarian torsion within a large pediatric hospital

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World Journal of emergency Medicine 2022年第3期13卷 229-231页

作者： Mark K.Hewitt Jesse e.Marshall-Sheppard April J.Kam Department of Medicine Division of Emergency MedicineMcMaster UniversityHamilton L8S 4L8Canada Department of Family Medicine University of TorontoToronto M5S1A1Canada Department of Pediatrics Division of Pediatric Emergency MedicineMcMaster UniversityHamilton 8S 4L8Canada

The diagnosis of ovarian torsion(OT)in girls is challenging compared to that of testicular torsion in boys for many reasons,but it behooves the medical community to continue to strive to better identify this uncommon but clinically important pathology^([1]) OT occurs when the ovary and associated structures rotate around its vascular pedicle,leading to eventually irreversible necrosis.^([2,3])Studies attempting to identify clinical features for early diagnosis have not reached a consensus on the best clinical predictors of this condition,making radiographic imaging of the ovaries even more crucial.^([4,5])

关键词： diagnosis pediatric torsion

Design of a Proportional-Integral-Derivative Controller for an Automatic Generation Control of Multi-area Power Thermal Systems Using Firefly Algorithm

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Ieee/CAA Journal of Automatica Sinica 2019年第2期6卷 503-515页

作者： K.Jagatheesan B.Anand Sourav Samanta Nilanjan Dey Amira S.Ashour Valentina e.Balas the Department of electrical & electronics eng. Mahendra Institute of Eng. & Tech. the Department of electrical & electronics eng. Hindusthan College of Eng. & Tech. the Department of Computer Science & engineering University Institute of Technology The University of Burdwan the Department of Information Technology Techno India College of Technology the Department of electronics and electrical Communications engineering Faculty of Engineering Tanta University the Faculty of engineering Aurel Vlaicu University of Arad

essentially, it is significant to supply the consumer with reliable and sufficient power. Since, power quality is measured by the consistency in frequency and power flow between control areas. Thus, in a power system operation and control,automatic generation control(AGC) plays a crucial role. In this paper, multi-area(Five areas: area 1, area 2, area 3, area 4 and area 5) reheat thermal power systems are considered with proportional-integral-derivative(PID) controller as a supplementary controller. each area in the investigated power system is equipped with appropriate governor unit, turbine with reheater unit, generator and speed regulator unit. The PID controller parameters are optimized by considering nature bio-inspired firefly algorithm(FFA). The experimental results demonstrated the comparison of the proposed system performance(FFA-PID)with optimized PID controller based genetic algorithm(GAPID) and particle swarm optimization(PSO) technique(PSOPID) for the same investigated power system. The results proved the efficiency of employing the integral time absolute error(ITAe) cost function with one percent step load perturbation(1 % SLP) in area 1. The proposed system based FFA achieved the least settling time compared to using the GA or the PSO algorithms, while, it attained good results with respect to the peak overshoot/undershoot. In addition, the FFA performance is improved with the increased number of iterations which outperformed the other optimization algorithms based controller.

关键词： Automatic generation control(AGC) firefly algorithm genetic algorithm(GA) particle swarm optimization(PSO) proportional-integral-derivative(PID) controller

Improving BRICS’s public health and wellness through physical activity

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Journal of Sport and Health Science 2019年第6期8卷 503-504页

作者： Barbara e.Ainsworth Fuzhong Li J.Larry Durstine School of Kinesiology Shanghai University of SportShanghai 200438China College of Health Solutions Arizona State UniversityPhoenixAZ 85004USA Oregon Research Institute OR 97403USA Department of exercise Science The University of South CarolinaColumbiaSC 29208USA

In 2009,Professor Steven Blair predicted that physical inactivity would be the greatest public health issue of the 21st century.~1 A public health problem is one that affects the health,function,and well-being of a la... 详细信息

关键词： greatest function BRICS

凉山州某县未接受抗病毒治疗的HIV-1感染者的耐药情况分析

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中国感染与化疗杂志 2024年第1期24卷 19-24页

作者：刘梅朱芮吴涛俄尔阿沙木袁天茹宋绍芳刘玲梁洪远曹汴川越西县第一人民医院抗病毒治疗中心四川凉山616650 首都医科大学附属北京地坛医院艾滋病临床中心西南医科大学附属医院感染病科结核病科感染与免疫实验室

目的分析凉山州某县未接受抗病毒治疗的HIV-1感染者的传播性耐药(TDR)情况,为了解当地HIV-1耐药株的传播及抗反转录病毒治疗(ART)方案的制定提供理论依据和技术支撑。方法以来源于2022年1—8月在凉山州某县未接受ART的HIV-1感染者为研... 详细信息

目的分析凉山州某县未接受抗病毒治疗的HIV-1感染者的传播性耐药(TDR)情况,为了解当地HIV-1耐药株的传播及抗反转录病毒治疗(ART)方案的制定提供理论依据和技术支撑。方法以来源于2022年1—8月在凉山州某县未接受ART的HIV-1感染者为研究对象,采集其血液样本并分离血浆和血细胞,血浆样本用于HIV-1 RNA定量检测和HIV-1 RNA基因型耐药检测,血细胞样本用于HIV-1 DNA定量检测和HIV-1 DNA基因型耐药检测。结果135例研究对象中,男性75例(55.6%),女性60例(44.4%),中位年龄37.5岁,彝族占比最大(96.3%)。性途径传播为HIV-1主要传播方式(83.0%)。发生TDR的有11例,发生率为8.1%。诊断HIV-1感染距耐药检测时间的中位数为11 d。HIV-1 RNA以10001~100000拷贝/mL占比较多(43.7%)。HIV-1 DNA以101~1000拷贝/106 cells占比较多(55.6%)。HIV-1亚型中,以B+C亚型重组占比最高(51.9%),其次为CRF07_BC重组型(43.0%)。135例研究对象中,有23例(17.0%)出现耐药突变位点,与非核苷类反转录酶抑制剂(NNRTI)有关的耐药突变位点有16例(11.9%),K103N是主要的耐药突变位点,依非韦伦和奈韦拉平是主要的耐药药物;与整合酶抑制剂(INSTI)有关的耐药突变位点有6例(4.4%),e157Q是主要的耐药突变位点,埃替拉韦和拉替拉韦是主要的耐药药物;有1例(0.7%)同时出现NNRTI和INSTI耐药突变位点。经过单因素和多因素logistic回归分析,相较于年龄>30岁,年龄≤30岁发生TDR风险更高。结论凉山州某县未接受ART的HIV-1感染者的耐药情况不容忽视,相较于年龄>30岁,年龄≤30岁发生TDR风险更高,建议HIV-1感染者在接受ART前均进行HIV-1耐药检测。

关键词：耐药突变位点传播性耐药人类免疫缺陷病毒抗反转录病毒治疗

气候变化背景下光核桃的潜在分布区和生态位变化

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北京林业大学学报 2024年第9期46卷 45-56页

作者：张淑宁包文泉敖敦赵光华王淋乌云塔娜白玉娥韩其木格内蒙古农业大学林学院内蒙古呼和浩特010018 内蒙古农业大学草原与资源环境学院内蒙古呼和浩特010018 汕尾中学广东汕尾516600 中国林业科学研究院经济林研究所河南郑州450003 赤峰市林业科学研究所内蒙古赤峰024005

【目的】探究气候变化对光核桃分布和生态位的影响,为光核桃资源的保护和开发提供理论支撑。【方法】本研究根据光核桃的216条地理分布数据,结合11个气候、土壤和地形因子,调用eNMeval程序包优化后的最大熵值模型(Maxent)模拟我国光核... 详细信息

【目的】探究气候变化对光核桃分布和生态位的影响,为光核桃资源的保护和开发提供理论支撑。【方法】本研究根据光核桃的216条地理分布数据,结合11个气候、土壤和地形因子,调用eNMeval程序包优化后的最大熵值模型(Maxent)模拟我国光核桃潜在分布区在未来3种气候条件下的空间分布格局,并使用ecospat软件包分析光核桃气候生态位变化,以确定影响光核桃分布的主要环境变量。【结果】(1)优化后的Maxent模型可准确预测光核桃的潜在地理分布区,分布区主要位于青藏高原和云贵高原等较高海拔地区,总面积约为360711.8 km2,其中拉萨河谷、雅鲁藏布江中游河谷、怒江、澜沧江、金沙江等干热河谷等地为光核桃高度适生区;(2)在未来气候条件下,光核桃适生区整体呈向西南收缩趋势,生境适宜度总体呈下降趋势;(3)影响光核桃分布的主要环境变量为气温年较差、等温性和海拔,光核桃未来时期与当前时期生态位的重叠率随气候变化加剧逐渐降低。【结论】随着未来气候变化,我国光核桃适生区将向纬度与海拔相对较高的地区进行迁移,光核桃气候生态位也将与当前生态位逐渐分化,温度和海拔是影响光核桃分布的主要环境因子。基于上述结果,我们应在当前和未来环境适宜度均无显著变化的区域设立保护地,以减少全球气候变暖影响,同时也可避免人类活动对光核桃资源的进一步破坏。

关键词：光核桃 Maxent模型潜在分布区生态位气候变暖

High density polyethylene (HDPe)--Graphite composite manufactured by extrusion:A novel way to fabricate phase change materials for thermal energy storage

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Particuology 2018年第5期16卷 131-140页

作者： A.Sciacovelli M.e.Navarro Yi Jin Geng Qiao Lifang Zheng Guanghui Leng Li Wang Yulong Ding Birmingham Centre for energy Storage &School of Chemical engineering University of Birmingham (UoB)BirminghamB1527TUK Global energy Interconnectlon Research Institute State Grid Corporation of ChinaBeijing 102209China Global energy lnterconnection Research Institute europe State Grid Corporation of ChinaBerlin 10117Germany UoB-USTB(University of Sdence & Technology Beijing)Joint Centre for energy &environmental education & Research Beijing100081China

Thermal energy storage (TeS)has the potential to facilitate the deployment of renewable energy through addressing the demand-supply mismatch,ultimately leading to the decarbonisation of heat supply. Among the TeS technologies,latent heat based TeS with composite phase change materials (PCMs)has shown great potential,which has attracted significant attention in recent ***,large scale and reliable manufacturing methods for composite PCMs are still largely ***,we present a study aimed to develop,for the first time,an extrusion process capable of fabricating high density polyethylene based graphite PCM composites at a high throughput and with enhanced thermal *** PCM composites were fabricated under different extrusion process parameters and characterized for their thermo-physical properties by multiple techniques including differential scanning calorimetry,thermal gravitational analyzer,and Fourier transform infrared *** results show that the extrusion process has the potential to fabricate PCM composite bars in a continuous fashion with a manufacturing throughput higher than traditional method;the fabricated PCM composites show enhanced properties (*** to +70% increase in thermal diffusivity);and there is a clear link between extrusion process parameters and PCMs *** analyses show a more homogeneous structure with a lower extrusion speed;whereas a high extrusion speed gives a more microscopically heterogeneous structure with visible graphite agglomerates distributed relatively homogeneous macroscopically;and a higher graphite content gives a larger agglomerate *** results of this work suggest that the elucidation of composition-process-property relationships is crucial:for a given formulation (composition), only through fine tuning of high throughput manufacturing process can make it possible to achieve the desired performance of the PCM composites.

关键词： Composite phase change materials Thermal energy storage Continuous manufacture Composition-process-structure-property relationships