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Thermoelectric Properties of n-type Poly(nickel 1,1,2,2-ethenetetrathiolate)Prepared by a New One-step Solvothermal Method

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Journal of Wuhan University of Technology(Materials Science) 2022年第4期37卷 760-764页

作者： wang yijiang YAO Qin QU Sanyin CHEN Lidong State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of ScienceShanghai 200050China University of Chinese Academy of Sciences Bejing 100049China CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of CeramicsChinese Academy of ScienceShanghai 200050China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China

Poly(nickel 1,1,2,2-ethenetetrathiolate)(poly[Na_(x)(Ni-ett)])is one of the most promising n-type organic thermoelectric materials which can be used in wearable ***,the conventional solution method is time-consuming and the prepared poly[Na_(x)(Ni-ett)]usually has poor crystallinity,which does not benefit for achieving high thermoelectric ***,a new one-step solvothermal method under the high reaction temperature and high vapor pressure was developed to prepare poly[Na_(x)(Ni-ett)]with a quite short *** experimental results show crystallinity and electrical conductivity are greatly enhanced as compared with those prepared by conventional solution *** a result,a maximum ZT value of 0.04 was achieved at 440 K,which is about four times of the polymer prepared by the conventional solution *** study may provide a new route to enhance the TE properties of n-type organic thermoelectric materials.

关键词： thermoelectric organic materials n-type poly[Na_(x)(Ni-ett)] solvothermal method

An analytical study of unsteady heat transfer in the rock surrounding a deep airway

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International Journal of Mining Science and Technology 2012年第3期22卷 411-415页

作者： wang yijiang Zhou Guoqing Wu Lei Zhou Yang Lu Yong School of Mechanics & Civil Engineering China University of Mining & Technology Xuzhou 221116 China State Key Laboratory of Geomechanics and Deep Underground Engineering China University of Mining & Technology Xuzhou 221008China

The heat transfer between an airway and the air flowing though it is an unsteady problem. The governing equation of unsteady heat transfer was solved using the method of separation of variables. The solution is an infinite series including Bessel functions. The theoretical solution was analyzed by solving for the positive roots of the transcendental equation by iteration. The dimensionless surface temperature of the sur- rounding rock is only affected by the Bi number but not by the thermo-physical coefficients of the rock. The dimensionless coefficient of heat transfer, k, decreases with the Fo number similarly to the influence of the Bi number on k. A formula for determining the fully developed stage (FDS) suitable for unsteady heat transfer in the airway is proposed. The FDS from theoretical analysis occurs with Fo from 1.6 to 2. The ratio of excess temperature in the surrounding rock is independent of the initial conditions and only dependent on the Bi number and the relative position in the airway, at the FDS. The calculation error is large when using just the first term from the complete series when Fo is from 2 to 12. Five terms give a solution approximately equal to that found using the complete series. The first term could replace the complete series only when Fo is greater than 12. The FDS plays an important role in predication of the temperature field of the surrounding rock and in simplified calculations.

关键词： Deep airway Surrounding rock Unsteady heat transfer Fully developed stage

Biodegradable composite polymer as advanced gel electrolyte for quasi-solid-state lithium-metal battery

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eScience 2022年第5期2卷 494-508页

作者： Simin Chai Yangpu Zhang yijiang wang Qiong He Shuang Zhou Anqiang Pan School of Material Science and Engineering Central South UniversityChangsha410083HunanChina Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province Central South UniversityChangsha410083HunanChina

The development of low-cost and eco-friendly gel polymer electrolytes (GPEs) with a wide window, ideal compatibility, and structural stability is an effective measure to achieve safe high-energy-density lithium-metal batteries. Herein, a biodegradable composite polyacrylonitrile/poly-L-lactic acid nanofiber membrane (PAL) is synthesized and used as a robust skeleton for GPEs. The 3D nanofiber membrane (PAL-3-C12) prepared with an adjusted weight ratio of polyacrylonitrile (PAN)/poly-L-lactic acid (PLLA) and spinning solution concentration delivers decent thermal stability, biodegradability, and liquid electrolyte absorbability. The “passivation effect” of PAN upon lithium metal is effectively alleviated by hydrogen bonds formed in the PAL chains. These advantages enable PAL GPEs to work stably to 5.17 V while maintaining high ionic conductivity as well as excellent corrosion resistance and dielectric properties. The interfacial compatibility of optimized GPEs promotes the stable operation of a Li||PAL-3-C12 GPEs||Li symmetric battery for 1000 h at 0.15 mA cm^(−2)/0.15 mA h cm^(−2), and the LiFePO4 full cell retains capacity retention of 97.63% after 140 cycles at 1C.

关键词： 3D nanofiber membrane Polymer membrane skeleton Gel polymer electrolyte Electrospinning method Lithium metal battery

Construction of zinc metal-Tin sulﬁde polarized interface for stable Zn metal batteries

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Advanced Powder Materials

Advanced Powder Materials 2023年第2期2卷 46-55页

作者： Yingzhu Hu Chunyan Fu Simin Chai Qiong He yijiang wang Mingyang Feng Yifang Zhang Anqiang Pan Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province School of Materials Science and EngineeringCentral South UniversityChangsha 410083China State Key Laboratory of Separation Membranes and Membrane Processes School of Material Science and EngineeringTiangong UniversityTianjin 300387China

Aqueous Zn metal batteries have become competitive electrochemical energy storage systems owing to their material abundance,low cost,high capacity,and ***,the notorious Zn dendrites and poor anode reversibility caused by the insulating by-products and“dead Zn”are still formidable challenges for their practical ***,an SnS-based layer coated on the Zn anode is reported to tackle these *** semiconducting SnS with a higher work function can drive the electrons from the Zn anode,which constructs a polarized interface between the SnS layer and *** semiconducting importance of the coating layer is veriﬁed through theoretical simulations,which can migrate the polarization layer from the electrode surface to a wellprotected spot beneath the coating *** polarization interface is effective in homogenizing the Zn^(2+)ﬂux and repelling the anions from electrochemical *** with the bare Zn,the SnS-coated Zn anode exhibits a notable 14.7-fold enhancement in plating/stripping lifetime(over 3000 h),high reversibility(with CE of 99.74%),and superior stability in full cells when paired with vanadium-and manganese-based cathodes.

关键词： Aqueous battery Zinc metal anode Functional interface layer Zinc dendrite Interfacial corrosion

Diagnosis and surgical treatment of intraveneous leiomyomatosis extending into the heart:two cases report and review of the literature

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Journal of Nanjing Medical University 2009年第5期23卷 305-310页

作者： Xiaowei wang Lin Zhang yijiang Chen Shijiang Zhang Jianwei Qin Yanhu Wu Jinhua Luo Department of Thoracic & Cardiovascular Surgery the First Affiliated Hospital of Nanjing Medical University Nanjing 210029 China

Objective： To investigate the clinical characteristics, diagnosis and surgical treatment of intravenous leiomyomatosis （IVL）, and outline the differences between Chinese and overseas cases. Methods： Clinical data of two IVL cases, treated in our hospital, were analyzed retrospectively and the related literature was also reviewed. The data of preoperative diagnostic rate, surgical procedures, and postoperative recurrence between patients in China and other countries were compared. Results： The first stage operation was performed successfully in 2 patients. However, they refused subsequent therapies, including a second stage operation to excise the remnants Of the tumor, uterus, bilateral oviducts and ovaries, and anti-estrogen therapy. Both suffered from IVL recurrence, one at 6-month and the other at 9-month, and died at 16-month and 12-month respectively after the first stage surgery. Worldwide reports of 110 IVL cases were reviewed, which included 28 cases in China and 82 cases in other countries. In the majority of the Chinese patients, tumors only extended into the fight atrium rather than the right ventricle （RA 22 cases vs RV 4 cases）. However, among the overseas patients, the rate of extension into the right atrium was similar to that of extension into the right ventricle （RA 41 cases vs RV 38 cases）. The rate of hysterectomies was not significantly different between Chinese and overseas patients （ 67.86% vs 55.9%, P=0.278）. The rate of correct preoperative diagnosis in the Chinese patients was significantly lower than that in the overseas patients （32.14% vs 80%, P=0.000002.）, as well asthe rate of complete excision of the tumor （22.7@0 vs 75.5%, P=0.000001）. The proportion of patients who undergoing a single-stage or a two-stage operation was similar in Chinese and overseas patients. The recurrence rate was significantly higher in the Chinese patients than in the overseas patients （36.8% vs 9.1%, P=0.0055）, and the patients with tumor recurrence were partia

关键词： Intravenous leiomyomatosis (IVL) Heart Diagnosis Surgical treatment

幽门螺杆菌阳性十二指肠溃疡患儿幽门螺杆菌根除前后肠道菌群变化特征及临床意义

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中华实用儿科临床杂志 2022年第12期37卷 939-943页

作者：王义江李祥济南市第二妇幼保健院儿二科济南271100

目的:探讨幽门螺杆菌(Hp)阳性十二指肠溃疡患儿Hp根除治疗前后肠道菌群变化特征及临床意义。方法:回顾性分析2018年1月至2020年12月济南市第二妇幼保健院收治的98例十二指肠溃疡患儿的临床资料,根据是否感染Hp分为Hp感染组与Hp未感染组... 详细信息

目的:探讨幽门螺杆菌(Hp)阳性十二指肠溃疡患儿Hp根除治疗前后肠道菌群变化特征及临床意义。方法:回顾性分析2018年1月至2020年12月济南市第二妇幼保健院收治的98例十二指肠溃疡患儿的临床资料,根据是否感染Hp分为Hp感染组与Hp未感染组,留取Hp感染组治疗前及治疗7 d、治疗14 d、治疗结束后30 d的粪便行16S rDNA测序,应用独立样本 t检验比较Hp感染组与Hp未感染组肠道菌群检出情况,配对 t检验比较Hp感染组治疗前后的肠道菌群检出情况,以非参数检验比较Hp感染组与Hp未感染组的菌群多样性[多样性(Shannon、Simpson)指数和丰富度(Chao 1)指数]和Hp感染组治疗前后的菌群多样性。结果:治疗前Hp感染组与Hp未感染组的双歧杆菌[(5.92±1.85) lg copies/g粪便比(6.58±2.01)lg copies/g粪便]、乳杆菌[(4.89±1.35) lg copies/g粪便比(4.47±1.59)lg copies/g粪便]、类杆菌[(8.42±2.12) lg copies/g粪便比(8.01±2.20) lg copies/g粪便]、产气荚膜梭菌[(5.90±1.90) lg copies/g粪便比(5.88±2.01) lg copies/g粪便]、肠球菌[(5.41±1.27) lg copies/g粪便比(5.02±1.48) lg copies/g粪便]、肠杆菌[(5.01±1.80) lg copies/g粪便比(5.37±1.47) lg copies/g粪便]、酵母菌[(5.90±1.85) lg copies/g粪便比(5.88±2.01) lg copies/g粪便]检出数量比较,差异均无统计学意义(均 P>0.05)。Hp感染组与Hp未感染组的肠道菌落多样性Shannon指数(3.84±0.52比3.90±0.45)、Simpson指数(0.16±0.04比0.15±0.05)、Chao 1指数(178.52±40.22比185.32±42.47)比较,差异均无统计学意义(均 P>0.05)。与治疗前比较,Hp感染组治疗后不同时间双歧杆菌、乳杆菌、类杆菌检出数量均下降(均 P0.05)。与治疗前比较,Hp感染组治疗后不同时间的Shannon指数与Chao 1指数均降低,Simpson指数均增加(均 P<0.05);与治疗7 d及治疗14 d比较,治疗结束后30 d的Shannon指数(2.85±0.45比2.57±0.48比3.20±0.50)与Chao 1指数(148.45±32.33比140.32±30.47比160.42±38.42)均增加,Simpson指数(0.25±0.06比0.27±0.08比0.19±0.05)降低(均 P<0.05)。结论:Hp感染对十二指肠溃疡患儿肠道菌群无明显影响,抗Hp治疗可导致肠道菌群失衡及肠道菌群多样性下降,在抗Hp治疗时应考虑大量抗生素对肠道菌群的影响。

关键词：幽门螺杆菌十二指肠溃疡肠道菌群

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亚洲金融危机引发对企业经营的思考

煤炭经济研究 1998年第12期18卷 54-55页

作者：王一江深圳信迪电力服务公司

一、亚洲金融危机的特点及内在因素随着世界经济的发展，当代经济危机同以往的经济危机有着不同的特点。它一般不单纯的是一定周期生产过剩的危机，而是复杂得多的结构性危机。这种结构性的危机是在某一领域、某一地区或某一国家，因失... 详细信息

一、亚洲金融危机的特点及内在因素随着世界经济的发展，当代经济危机同以往的经济危机有着不同的特点。它一般不单纯的是一定周期生产过剩的危机，而是复杂得多的结构性危机。这种结构性的危机是在某一领域、某一地区或某一国家，因失去某种平衡而发生的剧烈震荡并随即扩...

关键词：亚洲金融危机中国企业经营企业发展策略

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基于响应面法的矿用翅片管空冷器参数优化

化工学报 2024年第1期75卷 279-291页

作者：王义江孙莉刘梦涵杨金宏王国元中国矿业大学深地工程智能建造与健康运维全国重点实验室江苏徐州221116 中国矿业大学力学与土木工程学院江苏徐州221116 中煤建设集团有限公司北京102218

矿用空冷器是矿井降温系统常用的末端设备,优化矿用空冷器换热性能对提升矿井降温系统能效具有重要意义。采用Fluent建立了平直翅片管矿用空冷器模型,研究了翅片间距、翅片厚度、横向管间距和纵向管间距对传热因子、阻力因子和综合性能... 详细信息

矿用空冷器是矿井降温系统常用的末端设备,优化矿用空冷器换热性能对提升矿井降温系统能效具有重要意义。采用Fluent建立了平直翅片管矿用空冷器模型,研究了翅片间距、翅片厚度、横向管间距和纵向管间距对传热因子、阻力因子和综合性能评价指标的影响规律;采用Box-Behnken响应面法,分析了双参数协同作用下传热因子、阻力因子和综合性能评价指标变化规律。结果表明:随着翅片间距、横向管间距的减小,以及翅片厚度增加,传热因子、阻力因子和综合性能评价指标逐渐增加;综合性能评价指标则随纵向管间距的增加而先增加后降低;横向管间距、翅片厚度是影响空冷器传热及流动性能最显著的两个参数,而翅片间距、纵向管间距的影响最小;得到了平直翅片管矿用空冷器的最优参数,传热因子提升16.3%、阻力因子增加26.3%、综合性能评价指标提升8.3%。研究结果可为矿用翅片空冷器设计参数优化提供指导。

关键词：平直翅片管空冷器传热流动数值模拟 Box-Behnken响应面

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不同时间尺度节水灌溉水稻腾发量特征与影响因素分析

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农业机械学报 2016年第8期47卷 91-100,170页

作者：刘笑吟王冠依杨士红徐俊增王乙江河海大学水文水资源与水利工程科学国家重点实验室南京210098 河海大学水利水电学院南京210098 昆山市水利工程质量安全监督和水利技术推广站昆山215300

利用自制小型蒸渗仪系统在江苏省昆山市试验研究基地测定了2015年水稻生育期稻田蒸散量和土壤蒸发量,分析了节水灌溉稻田蒸散量、水稻蒸腾量和土壤蒸发量在水稻生育各期的日变化规律和稻季逐日变化趋势及分配特征,分别讨论了不同时间尺... 详细信息

利用自制小型蒸渗仪系统在江苏省昆山市试验研究基地测定了2015年水稻生育期稻田蒸散量和土壤蒸发量,分析了节水灌溉稻田蒸散量、水稻蒸腾量和土壤蒸发量在水稻生育各期的日变化规律和稻季逐日变化趋势及分配特征,分别讨论了不同时间尺度上蒸腾量和蒸发量与净辐射(Rn)、叶面积指数(LAI)、饱和水汽压差(D)、空气温度(Ta)、风速(V)和表层土壤含水率(W)的相关关系。结果表明,节水灌溉稻田蒸散量(ET)与水稻蒸腾量(T)均呈明显的倒'U'型单峰变化趋势,变化规律也基本保持一致。土壤蒸发量(E)在水稻生育前期也呈倒'U'型单峰变化,之后没有明显的日变化特征。夜间蒸腾量正负波动,水汽凝结对蒸渗仪的测量产生了不可忽视的影响。水稻生育期的T与ET逐日变化趋势及波动状况也都基本一致,总体上为先增加后减小,高峰期出现在分蘖后期。以分蘖后期为界,之前稻田蒸散以蒸发为主,之后以蒸腾为主。从水稻移栽到乳熟,E/ET从接近1逐渐减小至0.19,黄熟期略有增加。在小时和日时间尺度上,影响节水灌溉稻田蒸腾量与蒸发量的主要因素不完全相同,影响程度也不相同。Rn和LAI分别是小时和日尺度上水稻蒸腾量最主要的影响因素,而LAI和D则分别是两尺度上土壤蒸发量最主要的影响因素。在所有因素中,LAI对两时间尺度蒸腾量和蒸发量均有显著影响(α<0.001)。尺度差异的分析对田间水分管理及水转化研究都有重要的现实意义。

关键词：节水灌溉稻田蒸腾量蒸发量小型蒸渗仪时间尺度