检索结果-南通市图书馆

A facile and green preparation of durian shell-derived carbon electrodes for electrochemical double-layer capacitors

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2012年第6期22卷 624-630页

作者： L.K.ong A.Kurniawan A.C.Suwandi C.X.Lin X.S.Zhao S.Ismadji Department of Chemical Engineering Widya Mandala Surabaya Catholic UniversityKalijudan 37Surabaya 60114.Indonesia School of Chemical Engineering The University of Queensland.St.Lucia 4072.QldAustralia Department of Chemical Engineering Widya Mandala Surabaya Catholic University.Kaliludan 37.Surabaya 60114Indonesia

A facile and green preparation of high surface area activated carbons with mixed microporosity and mesoporosity from durian shell waste is reported in this *** pore structure and surface chemistry of the parent carbon were modified by the combination of ultrasonication and microwave irradiation *** effects of temperature and time in the ultrasonication treatment and power output and time in the microwave irradiation were studied. The electrochemical performance of carbon electrodes for supercapacitors was tested by cyclic voltammeter(CV) and galvanostatic *** results show that the capacitive energy storage of electrodes is critically dependent on the microporosity and surface chemistry of activated *** highest electrode capacitance in this work was 103.6 F/g that prepared from activated carbon modified at an ultrasonication temperature of 323.15 K for 10 min and microwave power output of 900 W for 10 min.

关键词： Durian shell Activated carbon Ultrasonication Microwave irradiation EDLC

Impacts of different drying strategies on drying characteristics,the retention of bio-active ingredient and colour changes of dried Roselle

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese journal of Chemical Engineering 2018年第2期26卷 303-316页

作者： Thing Chai Tham Mei Xiang Ng Shu Hui Gan Lee Suan Chua Ramlan Aziz Luqman Chuah Abdullah Sze Pheng ong Nyuk Ling Chin Chung Lim Law Department of Chemical Engineering The University of Nottingham Malaysia CampusJaian Broga43500 SemenyihSelangor D.E.Malaysia Institute of Bioproduct Development Universiti Teknologi MalaysiaUTMJohor Bahru81310 SkudaiMalaysia Department of Chemical and Environmental Engineering Universiti Putra Malaysia UPM43400 SerdangSelangorMalaysia Department of Process and Food Engineering Universiti Putra Malaysia UPM43400 SerdangSelangorMalaysia

The drying kinetics of Roselle （Hibiscus sabdariffa L） of variety Terengganu （UMKL-1） and the quality attribution of Roselle were studied. The experiments were conducted using four different drying methods, including solar greenhouse drying （SD）, solar greenhouse with intermittent heat pump drying （SIHP）, hot air drying （HA） and heat pump drying （HP）. Among the four drying methods, HP achieved the highest drying rate at a range from 0.054 g H20-（g DM）-1. rain-1 to 0.212 g H20-（g DM）-1. rain 1 while SD had the lowest drying rate, measured at 0.042 g H2O. （g DM） ***- 1. The analysis on colour kinetics revealed that there is no significant colour loss （p 〉 0.05） observed from HP＇s dried Roselle. Greater amount of flavonoid compounds i.e. protocatechuic acid was found in SD and SIHP dried finished product whereas HP＇s dried Roselle contains higher percentage of catechin as compared to other drying methods.

关键词： Hibiscus sabdariffa L.Drying Heat pump Total colour change Protocatechuic acid Catechin

A New Measurement of ^11Be(p,d) Transfer Reaction

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2018年第8期35卷 14-18页

作者： Ying jiang jian-Ling Lou Yan-Lin Ye Dan-Yang Pang jie Chen Zhi-Huan Li Yu-Cheng Ge Qi-Te Li jing Li Wei jiang Ye-Lei Sun Hong-Liang Zang Yun Zhang Wei Liu Gen Li N.Aoi E.Ideguchi H.j.ong j.Lee jin Wu Hong-Na Liu Chao Wen Y.Ayyad K.Hatanaka D.T.Tran T.Yamamoto M.Tanaka T.Suzuki T.T.Nguyen School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 School of Physics and Nuclear Energy Engineering Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang University Beijing 100191 Research Centre for Nuclear Physics Osaka university Osaka 567-0047 Japan Institute of Physical and Chemical Research Saitama 351-0198 Japan

A new ^11Be（p,d） transfer reaction experiment is performed in inverse kinematics with a radioactive11 Be beam at26.9 MeV. Three low-lying states, namely the 0＋ground state, the 2^＋ state at Ex = 3.37 MeV, and the multiplet at around 6 MeV in10 Be, are populated by this one-neutron transfer reaction. These three states in10 Be are clearly discriminated from the -value spectrum, which is rebuilt from energies and angles of the recoil deuterons in coincidence with10 Be. A spectroscopic factor for each state is extracted by comparing the experimental differential cross sections to the theoretical calculation results using the finite range adiabatic distorted wave approximation method with different global nucleon-nucleus potentials. It is found that the newly extracted spectroscopic factors for the 0＋and 2＋states are consistent with the previous ones, but the factor for the multiplet is smaller than the value in the reference, and the possible reason is discussed.

关键词： Be A New Measurement of p,d

基于Zig-Zag模型夹层板振动与声传输特性数值模拟研究

在线全文

学校读者我要写书评

暂无评论

船舶力学 2010年第8期14卷 938-944页

作者：洪明王晴大连理工大学工业装备结构分析国家重点实验室运载工程与力学学部船舶工程学院辽宁大连116024

基于Zig-Zag变形假定和板Mindlin一阶剪切理论,建立了复合材料夹层板有限元动力单元模型,分别对上、下面板和芯体建立了三个独立坐标系,考虑各部分转角变量独立,为具有厚夹芯和软夹芯的复合材料夹层板的动力分析提供了一种更为准确的有... 详细信息

基于Zig-Zag变形假定和板Mindlin一阶剪切理论,建立了复合材料夹层板有限元动力单元模型,分别对上、下面板和芯体建立了三个独立坐标系,考虑各部分转角变量独立,为具有厚夹芯和软夹芯的复合材料夹层板的动力分析提供了一种更为准确的有限元模型。采用有限元/边界元方法,建立了嵌在无限大障板上夹层板声传输的计算模型。通过推导的模型编制计算机程序,针对典型结构研究分析了芯板材料参数和厚度的变化对结构的动力特性的影响,并研究分析了在平面声波入射和混响声场入射情况下夹层板芯层材料参数、芯层厚度的变化对传声损失的影响。数值计算结果揭示了夹层板的动力特性和传声特性,对改善夹层板的力学和声学特性提供依据,对夹层板的设计有一定的指导意义。

关键词： Zig-Zag模型 Mindlin理论夹层板有限元分析振动特性声传输特性混响声场

Experimental investigation of erosion rate for gas-solid two-phase flow in 304 stainless/L245 carbon steel

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2022年第3期19卷 1347-1360页

作者： Bingyuan Hong Yanbo Li Xiaoping Li Gen Li ong Huang Shuaipeng ji Weidong Li jing Gong jian Guo National-Local joint Engineering Laboratory of Harbor Oil&Gas Storage and Transportation Technology Zhejiang Provincial Key Laboratory of Petrochemical Pollution ControlZhejiang Ocean UniversityZhoushan316022PR China National Engineering Laboratory for Pipeline Safety MOE Key Laboratory of Petroleum EngineeringBeijing Key Laboratory of Urban Oil and Gas Distribution TechnologyChina University of Petroleum-BeijingFuxue Road No.18Changping DistrictBeijing102249PR China CNOOC Research Institute Co.Ltd Beijing100028PR China PipeChina North Pipeline Company LangFang065000PR China College of Chemical Engineering Fuzhou UniversityFuzhou350108PR China

Erosion is one of the most concerning issues in pipeline flow assurance for the Oil&Gas pipeline industries,which can easily lead to wall thinning,perforation leakage,and other crucial safety risks to the steady operation of *** this research,a novel experimental device is designed to investigate the erosion characteristics of 304 stainless and L245 carbon steel in the gas-solid two-phase *** the impacts on erosion rate,the typical factors such as gas velocity,impact angle,erosion time,particle material and target material are individually observed and comprehensive analyzed with the assistance of apparent morphology characterized via Scanning Electron *** results show that the severest erosion occurs when the angle reaches approximate 30°whether eroded by type I or type II particles,which is observed in both two types of ***,304 stainless steel and L245 carbon steel appear to be cut at low angles,and impacted at high angles to form erosion *** the steady operational state,the erosion rate is insensitive to the short erosion time and free from the influences caused by the“erosion latent period”.Based on the comparison between experimental data and numerical results generated by existing erosion models,a modified model with low tolerance(ong consistency is proposed to make an accurate prediction of the erosion in terms of two types of steel under various industrial conditions.

关键词： Gas-solid flow Erosion 304 stainless L245 carbon steel Erosion model

风水及文化积累的局限——旧金山华人移民的文化认同

在线全文

学校读者我要写书评

暂无评论

思想战线 2007年第1期33卷 73-83页

作者： Aihwa ong 张晓萍姚莹美国加州大学伯克利分校云南大学云南昆明650091

20世纪80年代以来,移居美国的香港华人极力想要在美国积累文化资本和经济资本,开始在旧金山的湾区购买房地产。他们带去“风水”的文化逻辑,即在他们认为会给他们带来好运的地方进行房地产投资。这一行为在当今这样一个跨国时代的背景下... 详细信息

20世纪80年代以来,移居美国的香港华人极力想要在美国积累文化资本和经济资本,开始在旧金山的湾区购买房地产。他们带去“风水”的文化逻辑,即在他们认为会给他们带来好运的地方进行房地产投资。这一行为在当今这样一个跨国时代的背景下,向皮埃尔.布迪厄提出的文化资本积累的观点提出了挑战。新的移民也许可以获得文化资本,但却难于把它转变为社会资本,因为在象征资本和种族认同之间产生了一种不协调,也因此造成了他们在东道社会中社会地位低下的原因。所以,文化资本积累上的局限对移民来说是十分明显的。

关键词：文化资本象征资本社会资本种族认同移民

Rabi oscillation generation in the microring resonator system with double-series ring resonators

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2015年第5期11卷 342-347页

作者： Ahmad Fakhrurrazi Ahmad Noorden Kashif Chaudhary Mahdi Bahadoran Muhammad Safwan Aziz Muhammad Arif jalil ong Chee Tiong jalil Ali Preecha Yupapin Institute of Advance Photonics Science Nanotechnology Research AllianceUniversiti Teknologi Malaysia Department of Mathematics Universiti Teknologi Malaysia Advanced Studies Center Faculty of ScienceKing Mongkut's Institute of Technology Ladkrabang

In this paper, a microring resonator(MRR) system using double-series ring resonators is proposed to generate and investigate the Rabi oscillations. The system is made up of silicon-on-insulator and attached to bus waveguide which is used as propagation and oscillation medium. The scattering matrix method is employed to determine the output signal intensity which acts as the input source between two-level Rabi oscillation states, where the increase of Rabi oscillation frequency with time is obtained at the resonant state. The population probability of the excited state is higher and unstable at the optical resonant state due to the nonlinear spontaneous emission process. The enhanced spontaneous emission can be managed by the atom(photon) excitation, which can be useful for atomic related sensors and single-photon source applications.

关键词： resonator oscillation resonant waveguide unstable excited spontaneous insulator attached Hamiltonian

Images in emergency medicine:giant ascending aortic aneurysm dissection with hemopericardium

在线全文

学校读者我要写书评

暂无评论

World journal of Emergency Medicine 2012年第3期3卷 235-236页

作者： Boon ong Martyn Harvey Grant Cave Emergency Medicine Department Waikato Hospital Emergency Medicine Department Hutt Hospital

Acute chest pain represents a common presentation at emergency department. Aortic dissection in young patients, however, is fortunately rare. We report a case of giant ascending aortic aneurysm with Stanford type A aortic dissection in an otherwise well 22-year-old male patient. Operative aortic valve and root replacement was undertaken with favourable outcome. Histopathologic examination of the resected aorta revealed acute on chronic inflammatory change with Langerhans type giant cells consistent with a diagnosis of giant cell aortitis. While uncommon, emergencies of the aorta may present in young patients. Predisposing conditions are discussed.

关键词： Aorta Aneurysm Tamponade Dissection

Biodiversity Assessment of Avifauna in the Forest Reservation of Aurora State College of Technology (ASCOT), Philippines

在线全文

学校读者我要写书评

暂无评论

Open journal of Ecology 2024年第4期14卷 292-308页

作者： Afed S. Daiwey Heherson B. ong Emerson V. Barcellano Edmundo C. Gumpal Michelle Ann M. Calubaquib Rafael j. Padre School of Forestry and Environmental Sciences Aurora State College of Technology Baler Philippines College of Forestry and Environmental Science Isabela State University Cabagan Philippines College of Agriculture Isabela State University Cabagan Philippines College of Engineering Isabela State University Echague Philippines

The research study was conducted to assess and quantify the current status of avifauna biodiversity assets of Aurora State College of Technology’s Forest Reservation in Baler, Aurora, Philippines. Assessment of avifaunal diversity was undertaken by traversing the four established circular plots having a radius of 125 meters or 250 meters diameters each as permanent monitoring stations. Study revealed a total number of 151 Individual species, classified into 23 genera and 21 families. Eighteen of these species are endemic while the remaining five were fully migrated birds. All birds observed were classified as Least Concern (LC) species according to the International Union for Conservation of Nature’s Red List of Threatened Species and the updated list of the Birds of the World online. Its abundance, richness and diversity index were calculated using Shannon Diversity Index (H') while Pielou’s evenness (j') for distribution of species. Forest reservation of ASCOT has more even (0.756 j') and moderate diversity (2.812 H') observation on avifauna in general. However, this avian population evaluation was threatened into a verge of extinction due to natural and anthropological threats that causes forest deforestation. Such deforestation of habitat causes dwindling of wildlife territory leading to the scarcity of bird’s population. Thus, the assessment was conducted to aid ASCOT administration find significant plans to ensure sustainable conservation and protection of the remaining avifauna species in the reservation area.

关键词： Biodiversity Avifauna Abundance Species Richness Species Diversity