检索结果-南通市图书馆

Emerging Devices Based on Two-Dimensional Monolayer Materials for Energy Harvesting

在线全文

学校读者我要写书评

暂无评论

Research 2019年第1期2019卷 283-298页

作者： Feng ru fan Wenzhuo Wu School of Industrial Engineering Purdue UniversityWest LafayetteIndiana 47907USA Flex Laboratory Purdue UniversityWest LafayetteIndiana 47907USA Birck Nanotechnology Center Purdue UniversityWest LafayetteIndiana 47907USA

Two-dimensional(2-D)materials of atomic thickness have attracted considerable interest due to their excellent electrical,optoelectronic,mechanical,and thermal properties,which make them attractive for electronic devices,sensors,and energy *** the otherwise wasted energy from the ambient environment into electrical power holds promise to address the emerging energy needs,in particular for the portable and wearable *** versatile properties of 2-D materials together with their atomically thin body create diverse possibilities for the conversion of ambient *** present review focuses on the recent key advances in emerging energy-harvesting devices based on monolayer 2-D materials through various mechanisms such as photovoltaic,thermoelectric,piezoelectric,triboelectric,and hydrovoltaic devices,as well as progress for harvesting the osmotic pressure and Wi-Fi wireless *** representative achievements regarding the monolayer heterostructures and hybrid devices are also ***,we provide a discussion of the challenges and opportunities for 2-D monolayer material-based energy-harvesting devices in the development of self-powered electronics and wearable technologies.

关键词： harvesting ambient versatile

Immunoglobulin G4-related autoimmune pancreatitis and sialadenitis: A case report

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2015年第31期21卷 9448-9452页

作者： ru-Ying fan Jian-Qiu Sheng Department of Gastroenterology Beijing Military General Hospital

Immunoglobulin G4(Ig G4)-related disease is a rare systemic diseases. A 67-year-old male presented at our institution with mild upper abdominal pain and jaundice for 20 d. Laboratory results revealed high levels of Ig G4(15.4 g/L,range: 0.08-1.4 g/L). Computed tomography(CT) showed significant enlargement of the entire pancreas and a capsule-like low-density rim surrounding the whole pancreas. Positron emission tomography/CT revealed increased uneven metabolism of the entire pancreas. Both magnetic resonance cholangiopancreatography and endoscopic retrograde cholangiopancreatography showed stenosis of the distal common bile duct and proximal main pancreatic duct,and dilation of the proximal common bile duct and extra- and intra-hepatic bile ducts. He was diagnosed with Ig G4-related autoimmune pancreatitis. The patient was treated with prednisone for 14 mo. The patient responded well to prednisone but upon cessation of the corticosteroid developed enlargement of the submandibular gland. The patient's serum Ig G4 was elevated at 23.9 g/L. It is important to maintain treatment,so the patient was again treated with prednisone and had a good response. Follow-up of Ig G4-related disease is thus necessary.

关键词： Immunoglobulin G4 Immunoglobulin G4-related diseas

Tribocatalysis: challenges and perspectives

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2021年第10期64卷 1609-1613页

作者： Feng-ru fan Shunji Xie Guan-Wu Wang Zhong-Qun Tian State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Soft Matter ChemistryCollaborative Innovation Center of Chemistry far Energy Materials(iChEM)Department of ChemistryUniversity of Science and Technology'of ChinaHefei 230026China

With an increasing global energy demands and environmental pollution, the development of alternative clean energy technologies has aroused widespread research *** and converting natural energy from the environment, such as solar energy, mechanical energy, thermal energy, chemical and biological energy, is one of the main sources of clean energy.

关键词： catalysis pollution energy

同方期刊数据库

Cryptanalysis and improvement of several quantum private comparison protocols

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2020年第8期72卷 57-62页

作者： Zhao-Xu Ji Pei-ru fan Huan-Guo Zhang Hou-Zhen Wang Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of EducationSchool of Cyber Science and EngineeringWuhan UniversityWuhan 430072China

Recently, Wu et al(2019 Int. J. Theor. Phys. 58 1854) found a serious information leakage problem in Ye and Ji’s quantum private comparison protocol(2017 Int. J. Theor. Phys. 561517), that is, a malicious participant can steal another’s secret data without being detected through an active attack means. In this paper, we show that Wu et al’s active attack is also effective for several other existing protocols, including the ones proposed by Ji et al and Zha et al(2016 Commun. Theor. Phys. 65 711;2018 Int. J. Theor. Phys. 57 3874). In addition,we propose what a passive attack means, which is different from Wu et al’s active attack in that the malicious participant can easily steal another’s secret data only by using his own secret data after finishing the protocol, instead of stealing the data by forging identities when executing the protocol. Furthermore, we find that several other existing quantum private comparison protocols also have such an information leakage problem. In response to the problem, we propose a simple solution, which is more efficient than the ones proposed by Wu et al, because it does not consume additional classical and quantum resources.

关键词： quantum information security quantum cryptography quantum private comparison information leakage problem passive attack

Significant carbon isotope excursions in the Cambrian and their implications for global correlations

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2011年第12期54卷 1686-1695页

作者： fan ru DENG ShengHui ZHANG XueLei Research Institute of Petroleum Exploration ＆ Development PetroChina Beijing 100083 China State Key Laboratory of Enhanced Oil Recovery Beijing 100083 China Key Laboratory of OU and Gas Reservoir CNPC Beijing 100083 China

The existing δ 13C data in the Cambrian from different regions of the world are analyzed here. There are four well-documented carbon isotope excursions with global significance. In ascending order, they are：（1） a large negative excursion, comparable to ＂BACE＂（BAsal Cambrian Carbon isotope Excursion） event, which occurs near the Precambrian-Cambrian boundary with a magnitude of 4‰-10‰ （PDB）; （2） the ＂ZHUCE＂（ZHUjiaqing Carbon isotope Excursion） event, a distinct positive excursion （over 5%0） that can be recognized at the Fortunian Stage to Stage 2 transition; （3） another strong negative one, so-called ＂ROECE＂（Redlichiid-Olenellid Extinction Carbon isotope Excursion） event, shifting at the interval between Series 2 and Series 3, peaking at -3‰--5‰ （PDB）; （4） the famous Steptoean positive carbon isotope excursion （SPICE）, which has been widely identified at the base of Furongian Series, Paibian Stage, with an amplitude about 4‰ （PDB）. The four sharp σ13C shifts correlate well with coeval paleoceanographic changes and bioevents. Besides, there are some σ13C excursions from a few sections in previous studies, and more data are required to identify whether they are global or regional ones.

关键词： carbon isotope excursions global correlations Cambrian

同方期刊数据库

Subdivision and age of the Yanchang Formation and the Middle/Upper Triassic boundary in Ordos Basin, North China

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2018年第10期61卷 1419-1439页

作者： Shenghui DENG Yuanzheng LU Zhong LUO ru fan Xin LI Yi ZHAO Xueying MA rukai ZHU Jingwei CUI Research Institute of Petroleum Exploration and Development PetroChina Beijing 100083 China State Key Laboratory of Enhanced Oil Recovery of China Beijing 100083 China Key Laboratory of Oil and Gas Reservoir China National Petroleum CorporationBeijing 100083 China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083 China

The Yanchang Formation is extensively developed in the Ordos Basin and its surrounding regions. As one of the best terrestrial Triassic sequences in China and the major oil-gas bearing formations in the Ordos Basin, its age determination and stratigraphic assignment are important in geological survey and oil-gas exploration. It had been attributed to the Late Triassic and regarded as the typical representative of the Upper Triassic in northern China for a long time, although some scholars had already proposed that the lower part of this formation should be of the Middle Triassic age in the mid-late 20 th century. In this paper, we suggest that the lower and middle parts of the Yanchang Formation should be of the Ladinian and the bottom possibly belongs to the late Anisian of the Middle Triassic, mainly based on new fossils found in it and high resolution radiometric dating results. The main source rocks, namely the oil shales and mudstones of the Chang-7, are of the Ladinian Age. The upper part of the Yanchang Formation, namely the Chang-6 and the above parts, belongs to the Late Triassic. The uppermost of the Triassic is missed in most parts of the Ordos Basin. The Middle-Upper Triassic Series boundary lies in the Yanchang Formation, equivalent to the boundary between Chang-7 and Chang-6. The Ladinian is an important palaeoenvironmental turning point in the Ordos Basin. Palaeoenvironmental changes in the basin are coincidence with that of the Sichuan Basin and the main tectonic movement of the Qinling Mountains. It indicates that tectonic activities of the Qinling Mountains are related to the big palaeoenvironmental changes in both the Ordos and Sichuan Basins, which are caused by the same structural dynamic system during the Ladinian.

关键词： Yanchang Formation Zircon age dating geological age Middle/Upper Triassic boundary Tectonic-palaeoenvironment changing Ordos Basin

Effect of periodontal treatment on glycosylated hemoglobin levels n elderly patients with periodontal disease and type 2 diabetes

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2011年第19期124卷 3070-3073页

作者： OU Long LI ru-fan Department of Periodontology General Hospital of People＇s Liberation Army Postgraduate Medical School Beijing 100853 China

Background Periodontal disease is closely related to type 2 diabetes and is an important complication of *** study aimed to investigate the effect of periodontal treatment on levels of blood glucose （Glu） and glycosylated hemoglobin （HbA1c） among elderly patients with type 2 diabetes and periodontal *** A total of 107 elderly patients with type 2 diabetes and periodontal disease were selected and divided into two groups according to their HbA1c levels. Group A was a well-controlled diabetic group and group B was *** probing depth （PD）, attachment loss （AL）, the value of Glu and HbA1c were analyzed before periodontal treatment and 4 months *** There was a significant difference in periodontal condition between groups A and B （P 〈0.01）. The periodontal condition for both groups was significantly （P〈0.01） improved after periodontal therapy. The effect of treatment in group A was more pronounced than group B, and the difference was significant （P 〈0.01）. After the periodontal treatment, Glu and HbA1c were reduced significantly in both groups （P 〈0.05）.Conclusions Periodontal condition is related to the control of Glu level among elderly patients with type 2 diabetes and periodontal disease. Periodontal treatment can effectively reduce the level of Glu and HbA1c as well as improve the periodontal condition in elderly type-2 diabetes patients with periodontal disease.

关键词： periodontal disease type 2 diabetes glycosylated hemoglobin

Refining Middle-Upper Ordovician Conodont Biostratigraphy in the Hatuke Creek Section， Western North China Craton: Evidence from Bedding Plane Assemblages and Implications for Shale Gas Exploration

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2024年

作者： Xiuchun Jing Yang Shen ru fan Shengju Yin Jingjing fan Jitao Chen State Key Laboratory of Biogeology and Environmental Geology， China University of Geosciences State Key Laboratory of Palaeobiology and Stratigraphy， Nanjing Institute of Geology and Palaeontology， Chinese Academy of Sciences Museum， China University of Geosciences Beijing PetroChina Research Institute of Petroleum Exploration and Development

The 128.6-m-thick， shale-dominated Klimoli， Wulalike and Lashizhong formations exposed at the Hatuke Creek section in the Zhuozishan area of Inner Monglia， North China， have been investigated for conodonts. Detailed stratigraphical collections of conodonts preserved on bedding planes from graptolitic shales， supplemented by additional discrete conodonts acid-leached from limestones， enable a refinement of the conodont biostratigraphic scheme at this section. Four successive conodont biozones， ranging in age from mid Darriwilian to late Sandbian (Stage slices Dw2–Sa2)， are identified: the Dzikodus tablepointensis Biozone， the Eoplacognathus suecicus Biozone， the Pygodus serra Biozone， and the Pygodus anserinus Biozone， in ascending order. New sub-biozones， based on morphotypes of the biozonal index species， are proposed for the Pygodus serra and Pygodus anserinus biozones， providing alternatives when the traditional sub-biozones are unrecognizable. The biozonation is clearly correlated with the coeval Baltoscandian， South American and South China reference standard successions. The diverse preservation states of conodont bedding plane assemblages suggest that the alteration of conodonts in graptolitic shales represents a diagenetic process， challenging the prevailing hypothesis of pre-diagenetic dissolution. This study highlights the crucial role of previously overlooked conodont bedding plane assemblages in correlating Ordovician slope/basin facies shales， which holds great potential for marine shale gas exploration.

关键词：

Influence of external electric field on piezotronic effect in ZnO nanowires

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2015年第7期8卷 2390-2399页

作者： Fei Xue Limin Zhang Xiaolong Feng Guofeng Hu Feng ru fan Xiaonan Wen Li Zheng Zhong Lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 China School of Material Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA

In this work, the piezotronic effect is investigated for the first time in external electric fields ranging from 0 V·cm-I to 2,000 V·cm-1 by using n-type ZnO nanowires supported by a flexible substrate. In the presence of an external electric field, the Schottky barrier height （SBH） is lowered by the image force, allowing more free carriers to pass through the metal-semiconductor junction and enhancing the screening effect on positive piezoelectric polarization charges. As the strength of the external electric field increases, the piezotronic effect is significantly suppressed and the metal-semiconductor contact finally exhibits Ohmic behavior. The experimental results show that devices can be classified into three groups, corresponding to low, moderate, and high carrier densities of the nanowires used. This work not only helps us to explicate the basic physical mechanism of the piezotronic effect in a harsh environment in an electric field but also provides guidelines for future design and fabrication of piezotronic devices.

关键词： piezotronic effect,external electric field,ZnO nanowires