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35篇 您的检索式:作者名="Li Zhitong"
    题名 作者 年代 出处 被引量
1Discovery of the Early Paleozoic post-collisional granites in northern margin ofthe Erguna massif and its geological significance显示文摘The Luoguhe intrusion, located in MoheCounty, Heilongjiang Province, is mainly composed of mon-zogranite, quartz diorite and granodiorite, with minor dio-rite, tonalite, quartz monzodiorite, quartz monzonite, syeno-granite and alkali-feldspar granite. The intrusion can bedivided into two lithological units, i.e. quartz diorite andmonzogranite units, with affinities to high-K calc-alkalineseries. The quartz diorite unit (SiO2: 54.79%―58.30%Na2O/CaO: 0.79―1.53 and Shand index: 0.77―0.82) belongsto metaluminous rocks. And the monzogranite unit (SiO2:65.29%―66.45%, Na2O/CaO: 1.73―3.43 and Shand index<1.05) can be considered as weakly peraluminous rocks. Theintrusion is characterized by high REE abundance (∑REE =180.2―344.3 μg/g), medium-strong negative Eu anomalies(δ Eu = 0.33―0.82), weak REE fractionation [(La/Yb)N =4.12―10.45], enrichments in Rb, Th, U, K, La, Ce, Nd, HfZr and Sm, but strong depletions of Ba, Nb, Ta, Sr, P and TiThese characteristics of major, REE and trace elements in-dicate that the intrusion was formed in a transitional tectonicsetting from compressional to extensional regime, which canbe classified as post-collisional granitoids. SHRIMP U-Pbzircon analyses yield ages of 517±9 and 504±8 Ma for thequartz diorite and monzogranite units, respectively. The dis-covery of Early Paleozoic post-collisional granites in thenorthern margin of the Erguna massif indicates that thenorthern branch of Paleo-Asian Ocean between Siberianplate and Erguna massif was closed in the Early Paleozoicand the Salair orogeny ended ca. 500 Ma ago.WU Guang SUN Fengyue ZHAO Caisheng LI Zhitong ZHAO Ailin PANG Qingbang LI Guangyuan 2005Chinese Science Bulletin2005,50,23:69
2Effect of oxidization on enrichment behavior of TiO_2 in titanium-bearing slag显示文摘Due to the dispersed distribution of the titanium component in various mineral phases and very fine grain size, it is difficult to recover the titanium component from the slag. In order to utilize titanium resources, selective enriching and selective growing of the titanium component from the molten slag is expected. In this paper, the selection of the best tita- nium enrichment phase and the effect of oxidization on the enrichment of titanium by blowing air into the molten slag were studied. The results showed that through oxidizing the slag, the content of the perovskite phase increases while that of the other titanium-bearing mineral phases decreases until they disappear. Most titania resources were enriched into the perovskite phase and increase in size. The process of enrichment and growth is easily carried out.WANG Mingyu LI Liaosha ZHANG Li ZHANG Linnan TU Ganfeng SUI Zhitong 2006Rare Metals2006,25,2:23
3Insult of gastroesophageal reflux on airway: clinical significance of pharyngeal nozzle显示文摘在到最糟的最高的注意在航线上吸烟以及薄雾侮辱的全球付钱的时间,所有人知道两个外长、显著。然而,包括许多医药人员,人们主要不知道 gastroesophageal 倒流(GER ) 怎么糟糕在我们的自己的航线上侮辱。GER 的症状通常被看作心痛和流回,它能主要被容忍。不管多么起来在它出现的地方,去的胃的内容相对地传递食管然后远侧的咽象苛评一样的鸟喙,用作一张嘴,以便生产众多微粒子并且到达oro鼻的洞并且另外引起的航线过敏鼻炎和气喘的攻击,甚至肺的实质损害。它将减少生活质量或甚至使受危险生活。内长的侮辱在呼吸系统出现,但是从消化的道发源的点不是众所周知的并且经常 undiagnosed 并且不正确地对待。导致的航线挑战是的 GER 一个可对待、预防的实体一旦诊断被做,好消除能通过 radiofrequency 或 fundoplication 借助于张开的贲门的生活方式调整,药,或固定被期望。作者王忠高博士承受了它为长并且症状在反倒流外科以后消失了 8 年。这是王忠高博士和他的队工作的一个演讲并且将引起注意到公众以便认出作为吸烟或薄雾从人的本身,然而并非从外面的环境发生的一个可对待的条件做的这个相对未知的实体。Zhonggao Wang Zhiwei Hu Jimin Wu Feng Ji Hongtao Wang Yungang Lai Xiang Gao Yachan Ning Chengchao Zhang Zhitong Li Weitao Liang Jianjun Liu 2015Frontiers of Medicine2015,9,1:21
4Suppression of Surface Burn in Grinding of Titanium Alloy TC4 Using a Self-inhaling Internal Cooling Wheel显示文摘Based on analysis of surface average temperature and burn degree, this article obtains the threshold temperature of surface burn in grinding titanium alloy with cup wheels. Meanwhile, the impact of the burn degree on the metallographic structure of workpiece surface and metallurgical phase transformations is investigated. In order to reduce the grinding temperature and improve the grinding efficiency, a self-inhaling structure cup segmented wheel is developed to generate internal cooling effect. The internal cooling technology is compared with traditional cooling conditions in the grinding experiments on TC4 (Ti-6Al-4V). The results indicate that the self-inhaling internal cooling wheel can reduce the grinding surface temperature by 30% or more, and the grinding efficiency doubles. Utilizing water-based semi-synthetic coolant, the segmented wheel with the self-inhaling structure can further reduce the grinding temperature by about 50%.LI Xun CHEN Zhitong CHEN Wuyi 2011Chinese Journal of Aeronautics2011,24,1:18
5Design and experimental study of a micro-groove grinding wheel with spray cooling effect显示文摘The effectiveness of grinding fluid supply has a crucial impact on grinding quality and efficiency in high speed grinding. In order to improve the cooling and lubrication, through in-depth research of self-inhaling internal cooling method and intermittent grinding mechanism, a new spray cooling method used in high speed grinding is proposed. By referring to the structure of bowlshaped dispersion disk, the grinding wheel matrix with atomization ability is designed; through studying heat transfer of droplet collision and the influence of micro-groove on the boiling heat transfer, grinding segment with micro-groove is designed to enhance the heat flux of coolant and achieve maximum heat transfer between droplets and grinding contact zone. High-speed grinding experiments on GH4169 with the developed grinding wheel are carried out. The results show that with the micro-groove grinding wheel just 5.4% of pump outlet flow rate and 0.5% of spindle energy is needed to reduce the grinding temperature to 200 C, which means the developed grinding wheel makes cooling high efficient and low energy consuming.Shi Chaofeng Li Xun Chen Zhitong 2014Chinese Journal of Aeronautics2014,27,2:14
6Geochemistry and Genesis of the Late Jurassic Granitoids at Northern Great Hinggan Range:Implications for Exploration显示文摘迟了的侏罗记的 Longgouhe 和 Ershiyizhan 侵入,在北大 Hinggan 范围的上面的 Heilongjiang 盆定位了,仔细与斑岩 Cu-Au 矿化作用有关。在岩性学,侵入是石英闪长岩,石英 monzodiorite 和 high-K 的 granodiorite 计算碱的系列,与 shoshonite 的次要的方面系列。他们的 SiO2 和 Al2O3 内容分别地从 61.37% ~ 66.59% 和 15.35% ~ 17.06%。MgO 内容从 2.02% ~ 3.47%,与 4459 的 Mg# 索引。(La/Yb ) N 和 Eu/Eu * 价值从 16.85 ~ 81.73 和 0.68 ~ 0.93 分别地,出现的强壮的区别稀土元素元素(REE ) adakites 的类似于那些的模式。岩石在 Ba, Sr 和轻 REE (LREE ) 被充实,显然在 Nb 和 Ta 弄空,稍微弄空在 Rb 和 Ti,和在 Yb 和 Y 的穷人与 0.311.32 ppm 和 4.3212.07 ppm 的 Yb 和 Y 内容,分别地。是由 67.74220.60 的 Sr/Y 比率显示了,岩石被 low-Y 和 high-Sr 内容描绘,它在世界上描绘 adakites。整体地, geochemical tracers 建议感兴趣的侵入是 adakitic 岩石。给 Paleo 亚洲的海洋和蒙古人鄂霍次克海海洋在晚古生代、二叠中间的侏罗记被关上分别地,感兴趣的侵入应该被 delaminated 外壳的部分融化形成,它在 collisional 造山运动在之间期间被变厚西伯利亚并且 Mongolian-Sinokorean 大陆。WU Guang CHEN Yanjing SUN Fengyue ZHANG Zhe LIU Ankun LI Zhitong 2010Acta Geologica Sinica(English Edition)2010,84,2:10
7Novel MOF shell-derived surface modification of Li-rich layered oxide cathode for enhanced lithium storage显示文摘Li-rich layered oxide materials have attracted increasing attention because of their high specific capacity(>250 mAh g^(-1)). However, these materials typically suffer from poor cycling stability and low rate performance. Herein, we propose a facile and novel metal-organic-framework(MOF) shell-derived surface modification strategy to construct NiCo nanodots decorated(~5 nm in diameter) carbon-confined Li_(1.2)Mn_(0.54) Ni_(0.13)Co_(0.13)O_2 nanoparticles(LLO@C&NiCo). The MOF shell is firstly formed on the surface of as-prepared Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2 nanoparticles via low-pressure vapor superassembly and then is in situ converted to the NiCo nanodots decorated carbon shell after subsequent controlled pyrolysis.The obtained LLO@C&NiCo cathode exhibits enhanced cycling and rate capability with a capacity retention of 95% after 100 cycles at 0.4 C and a high capacity of 159 mAh g^(-1) at 5 C, respectively, compared with those of LLO(75% and 105 mAh g^(-1)). The electrochemical impedance spectroscopy and selected area electron diffraction analyses after cycling demonstrate that the thin C&NiCo shell can endow LLO with high electronic conductivity and structural stability, indicating the undesired formation of the spinel phase initiated from the particle surface is efficiently suppressed. Therefore, this presented strategy may open a new avenue on the design of high-performance electrode materials for energy storage.Zhitong Xiao Jiashen Meng Qi Li Xuanpeng Wang Meng Huang Ziang Liu Chunhua Han Liqiang Mai 2018Science Bulletin2018,63,1:8
8Chronological record of the Early Mesozoic underplating in the northern margin of North China—U-Pb chronometry of zircons in the Late Mesozoic andesite from Western Liaoning显示文摘锆石在的阴极射线发光分光镜的分析最高在西方的辽宁的早 Yixian 形成的 sanukites 在暴烈的岩石中揭示锆石的 zoning 结构。锆石的中央部分是残余锆石, U-Pb 254 妈标明日期的 LA-ICP-MS 测时学表演,与在 plating granulites 下面的早中生代的年龄一致,并且圆周是锆石从主人岩浆结晶, U-Pb 116 妈标明日期,它与 Ar-Ar 主人标明日期高度一致暴烈的岩石。在 sanukites 的 clinopyroxenes xenocrystals 的作文类似于 clinopyroxenes 在的那些在 plating granulites 下面,显示 granulites 在早中生代增大了到更低的外壳被改革了并且破坏由起来岩流圈的 welling 尿布并且在迟了的中生代参加 sanukites 的形成。Shao Ji'an Zhang Hongfu Liu Xiaoming Li Zhitong 2007Progress in Natural Science:Materials International2007,17,8:5
9Crucial control measures to contain China's first Delta variant outbreak显示文摘The SARS-C oV-2 B.1.617.2(Delta) variant flared up in late May in Guangzhou,China.Transmission characteristics of Delta variant were analysed for 153 confirmed cases and two complete transmission chains with seven generations were fully presented.A rapid transmission occurred in five generations within10 days.The basic reproduction number(R_0) was 3.60(95% confidence interval:2.50-5.30).After redefining the concept of close contact,the proportion of confirmed cases discovered from close contacts increased from 43% to 100%.With the usage of a yellow health code,the potential exposed individuals were self-motivated to take a nucleic acid test and regained public access with a negative testing result.Facing the massive requirement of screening,novel facilities like makeshift inflatable laboratories were promptly set up as a vital supplement and 17 cases were found,with 1 pre-symptomatic.The dynamic adjustment of these three interventions resulted in the decline of Rt from 5.00 to 1.00 within 9 days.By breaking the transmission chain and eliminating the transmission source through extending the scope of the close-contact tracing,health-code usage and mass testing,the Guangzhou D elta epidemic was effectively contained.Lei Luo Zifeng Yang Jingyi Liang Yu Ma Hui Wang Chitin Hon Mei Jiang Zhengshi Lin Wenda Guan Zhitong Mai Yongming Li Kailin Mai Zhiqi Zeng Chuanmeizi Tu Jian Song Bin Liu Yong Liu Jianfeng He Huiyuan Li Bosheng Li Hang Dong Yutian Miao Shujun Fan Lirui Fan Xingyi Liang Ke Li Chun Chen Huihong Deng Zhicong Yang Nanshan Zhong 2022National Science Review2022,9,4:2
10Incorporating transportation network modeling tools within transportation economic impact studies of disasters显示文摘Transportation system disruption due to a disaster results in 'ripple effects' throughout the entire transportation system of a metropolitan region.Many researchers have focused on the economic costs of transportation system disruptions in transportation-related industries,specifically within commerce and logistics,in the assessment of the regional economic costs.However,the foundation of an assessment of the regional economic costs of a disaster needs to include the evaluation of consumer surplus in addition to the direct cost for reconstruction of the regional transportation system.The objective of this study is to propose a method to estimate the regional consumer surplus based on indirect economic costs of a disaster on intermodal transportation systems in the context of diverting vehicles and trains.The computational methods used to assess the regional indirect economic costs sustained by the highway and railroad system can utilize readily available state departments of transportation(DOTs)and metropolitan planning organizations(MPOs) traffic models allowing prioritization of regional recovery plans after a disaster and strengthening of infrastructure before a disaster.Hurricane Katrina is one of the most devastating hurricanes in the history of the United States.Due to the significance of Hurricane Katrina,a case study is presented to evaluate consumer surplus in the Gulf Coast Region of Mississippi.Results from the case study indicate the costs of rerouting and congestion delays in the regional highway system and the rent costs of right-of-way in the regional railroad system are major factors of the indirect costs in the consumer surplus.Yi Wen Li Zhang Zhitong Huang Mingzhou Jin 2014Journal of Traffic and Transportation Engineering(English Edition)2014,1,4:2
11High‑Performance Flexible Microneedle Array as a Low‑Impedance Surface Biopotential Dry Electrode for Wearable Electrophysiological Recording and Polysomnography显示文摘Microneedle array(MNA)electrodes are an effective solution to achieve high-quality surface biopotential recording without the coordination of conductive gel and are thus very suitable for long-term wearable applications.Existing schemes are limited by flexibility,biosafety,and manufacturing costs,which create large barriers for wider applications.Here,we present a novel flexible MNA electrode that can simultaneously achieve flexibility of the substrate to fit a curved body surface,robustness of microneedles to penetrate the skin without fracture,and a simplified process to allow mass production.The compatibility with wearable wireless systems and the short preparation time of the electrodes significantly improves the comfort and convenience of electrophysiological recording.The normalized electrode–skin contact impedance reaches 0.98 kΩcm^(2)at 1 kHz and 1.50 kΩcm^(2)at 10 Hz,a record low value compared to previous reports and approximately 1/250 of the standard electrodes.The morphology,biosafety,and electrical/mechanical properties are fully characterized,and wearable recordings with a high signal-to-noise ratio and low motion artifacts are realized.The first reported clinical study of microneedle electrodes for surface electrophysiological monitoring was conducted in tens of healthy and sleep-disordered subjects with 44 nights of recording(over 8 h per night),providing substantial evidence that the electrodes can be leveraged to substitute for clinical standard electrodes.Junshi Li Yundong Ma Dong Huang Zhongyan Wang Zhitong Zhang Yingjie Ren Mengyue Hong Yufeng Chen Tingyu Li Xiaoyi Shi Lu Cao Jiayan Zhang Bingli Jiao Junhua Liu Hongqiang Sun Zhihong Li 2022Nano-Micro Letters2022,14,8:1
12The crack propagating behavior of composite coatings prepared by PEO on aluminized steel during in situ tensile processing显示文摘Zhitong Chen Guang Li Zhenqiang Wu Yuan Xia 2010Materials Science & Engineering A2010,,3:1
13Review on Remediation Technologies of Soil Contaminated by Heavy Metals显示文摘Zhitong Yao Jinhui Li Henghua Xie Conghai Yu 2012Procedia Environmental Sciences2012,,:1
14A qualitative study of perspectives on access to tuberculosis health services in Xigaze, China显示文摘Background:Tuberculosis(TB)is a major global health threat and the leading infectious disease cause of death worldwide.Access to and retention in TB care remains a challenge for patients,particularly those living in rural and remote settings.This qualitative study explored barriers and facilitators to accessing and maintaining contact with TB care services in communities in Xigaze(Shigatse)prefecture,Xizang Autonomous Region(Tibet Autonomous Region),China from the perspective of persons impacted by TB.Methods:We conduced in-depth interviews with 23 participants impacted by TB in four rural districts in Xigaze prefecture,Xizang Autonomous Region,China between April 2019 and November 2020.Interviews were conducted in Tibetan and Mandarin,transcribed in Mandarin and translated into English.Transcripts were checked against recordings by native Tibetan and Mandarin speakers.QSR NVivo12 software was used for framework analysis guided by an access to care conceptual framework by Levesque et al.Results:Overall patients reported low awareness of and an indiferent attitude towards TB,although all reported understanding the need to adhere to treatment.Participants reported complex pathways to care,often requiring visits to multiple healthcare facilities.Some participants reported visiting traditional Tibetan medicine(TTM)providers.Participants reported various barriers to accessing care including challenges physically reaching care,out-of-pocket payments for tests,diagnostics and transport.Barriers to maintaining care included medication side efects and worry about treatment efectiveness.Enablers to accessing care identifed included knowledge or past experience with TB,integrated models of TTM and western care,supportive village doctors who conducted home visits,free TB treatment and other subsidies,as well as having family support with care and social support as barriers and facilitators to maintaining treatment.Conclusions:We identifed barriers and facilitators to accessing services in rural communities in Xigaze from the perspective of persons impacted by TB.Challenges include complex pathways to care,travel distances,wait times and low awareness.Tuberculosis care in the region could be strengthened by ongoing culturally tailored educational campaigns to increase awareness,partnerships with TTM providers,providing comprehensive treatment subsidies and strengthening the role of family members in comprehensive TB care.Victoria Haldane Zhitong Zhang Qi Ma Tingting Yin Bei Zhang Yinlong Li Qiuyu Pan Katie N.Dainty Elizabeth Rea Pande Pasang Xiaolin Wei Jun Hu 2021Infectious Diseases of Poverty2021,10,5:1
15Kinetics of non-isothermal precipitation process of the perovskite phase in CaO-TiO2-SiO2-Al2O3-MgO system显示文摘Yuhai Li Taiping Lou Yuhu Xia Zhitong Sui 2000Journal of Materials Science2000,,22:1
16Design and Experimental Study of a Micro-groove Grinding Wheel with Spray Cooling Effect显示文摘Chaofeng Shi Xun Li Zhitong Chen 2013Chinese Journal of Aeronautics2013,,:1
17Study onGreen Enrichment and Separation of Copper and IronComponents from Copper Converter Slag 显示文摘Hongyang Cao’Jimin Wang Li Zhang Zhitong Sui 2012ProcediaEnvironmental Sciences2012,16,:1
18Review on remediation technologies of soil contaminated by heavy metals显示文摘Yao Zhitong Li Jinhui Xie Henghua 0,,16:1
19Preparation of DyFe_2 by the Reduction-Diffusion Process显示文摘The free energy change for the reduction-diffusion reaction which was used to prepare the DyFe2 Dy2 O3(s) + 3Ca(g) + 4Fe(s) = 3CaO(s) + 2DyFe2(s) intermetallic compound powder was calculated. The reduction-diffusion experiments were carried out at 1073, 1123. 1273 and 1373 K respectively using powders of Dy2O3, iron, and calcium grains as raw materials. XRD and EDX analysis confirmed that DyFe2 was formed by the diffusion of Dy into Fe.Guangsi GUO, Guangqiang LI, Zhenqi HUANG, Zhitong SUI and Liang LIU (School of Materials and Metallurgy, Northeastern University, Shenyang 110006, China) Thlin ZHOU (Baotou Research Institute of Rare Earth, Baotou 014010, China) 2000Journal of Materials Science & Technology2000,16,2:1
20Reviewon remediation technologies of soil contaminated byheavy metals 显示文摘Yao Zhitong Li Jinhui Xie Henghua 2012Proce Environ Sci2012,16,:1
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