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| 1 | Preparation of multi-atom specially entangled W-class state and splitting quantum information显示文摘We give a protocol to prepare specially entangled W-class state of multi-atom which can be used to exactly teleport an arbitrarily unknown two-level two-atom state. During the process, the quantum in-formation is split into n parts and the original quantum information can be sent to anyone of the n re-cipients with the other n-1 recipients' collaboration. In addition, we will give a suggestion to realize this scheme via QED cavity. | WANG YaHong SONG HeShan | 2009 | Chinese Science Bulletin2009，54，15： | 20 |
| 2 | Biosorption of Cu(Ⅱ) on extracellular polymers from Bacillus sp.F19显示文摘Biosorption can be an effective process for the removal of heavy metals from aqueous solutions.The adsorption of Cu(Ⅱ) from aqueous solution on the extracellular polymers (EPS) from Bacillus sp.(named MBFF19) with respect to pH,incubation time,concentration of initial Cu(Ⅱ),and biosorbent dose was studied.Biosorption of Cu(Ⅱ) is highly pH dependent.The maximum uptake of Cu(Ⅱ) (89.62 mg/g) was obtained at pH 4.8.Biosorption equilibrium was established in approximately 10 min.The correlation coeffcient of more than 0.90 turned out that the adsorption process of Cu(Ⅱ) on MBFF19 was in accordance with both Langmuir and Freundlich isotherms.The pseudo-first and second order models were applied to examine the kinetics of the adsorption,whereas the latter was found to be in harmony with the kinetic data better.Because of the outstanding uptake capacity of Cu(Ⅱ),MBFF19 produced by Bacillus sp.was proved to be an excellent biosorbent for removing Cu(Ⅱ) from aqueous solutions. | ZHENG Yan,FANG Xuliang,YE Zhilong,LI Yahong,CAI weimin School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China. | 2008 | Journal of Environmental Sciences2008，20，11： | 15 |
| 3 | Finite element simulation and experimental test of the wear behavior for self-lubricating spherical plain bearings显示文摘In this study, based on the classical Archard adhesion wear theory, a three-dimensional finite element model was established, with the aim of simulating the failure process of self-lubricating spherical plain bearings in the swinging wear condition. The results show that the self-lubricating spherical plain bearings go through two different stages during the wear process, namely, initial wear stage and stable wear stage. Because the large contact points wear out during the initial wear stage, the maximum contact pressure decreases as the test period increases. The relatively larger wear depth region shows elliptical distribution, and the maximum distribution appears in the central contact area. The wear depth reaches 0.974 mm after swinging 25,000 times. PTFE fibers, which possess a good friction performance but poor abrasion resistance, abundantly exist on the friction surfaces of the fabric liner. Consequently, the friction torque during the initial wear stage is slightly smaller than the friction torque during the stable wear stage; however, the wear rate during the initial wear stage is high. The reliability and effectiveness of the finite element model are verified by experiment. The developed finite element model can be used for the analysis of the wear mechanisms of bearings and the prediction of the service life of bearings. | Yahong XUE Jigang CHEN Sumin GUO Qingliang MENG Junting LUO | 2018 | Friction2018，6，3： | 11 |
| 4 | Responses of Soil Microbial Community Structure and Activity to Incorporation of Straws and Straw Biochars and Their Effects on Soil Respiration and Soil Organic Carbon Turnover显示文摘Like straw, biochar incorporation can influence soil microorganisms and enzyme activities and soil carbon(C) responses;however,few studies have compared the various effects of straw and biochar and the underlying mechanisms. An experiment was performed to study the changes in soil respiration(SR) and soil organic C(SOC) fluxes in response to the incorporation of three kinds of straw(reed, smooth cordgrass, and rice) and their pyrolyzed products(biochars) at Chongming Island, China. In addition, the microbial activity and community structure of some amended soils were also analyzed to clarify the mechanisms of these responses. The results showed that all biochar incorporation(BC) induced lower SR than the corresponding unpyrolyzed straw incorporation(ST), and the average SR in the soils following BC and ST during the experimental periods was 21.69 and 65.32 μmol CO2 m^-2s^-1, respectively.Furthermore, the average SOC content was 16.97 g kg-1 following BC, which was higher than that(13.71 g kg-1) following ST,indicating that compared to ST, BC was a low-C strategy, even after accounting for the C loss during biochar production. Among the BC treatments, reed-BC induced the lowest SR(17.04 μmol CO2 m^-2s^-1), whereas smooth cordgrass-BC induced the highest SR(27.02 μmol CO2 m^-2s^-1). Furthermore, in contrast with ST, BC significantly increased the abundance of some bacteria with poorer mineralization or better humification ability, which led to lower SR. The lower easily oxidizable C(EOC) and higher total C contents of biochars induced lower SR and higher SOC in the soil following BC compared to that following ST. Among the BC treatments,the higher total nitrogen content of rice biochar led to significantly higher soil microbial biomass, and the lower EOC content of reed biochar led to lower soil microbial activity and SR. | TIAN Xiaoping WANG Lei HOU Yahong WANG Han TSANG Yiu Fai WU Jihua | 2019 | Pedosphere2019，29，4： | 7 |
| 5 | Expert Recommendations for Tracheal Intubation in Critically Ill Patients with Noval Coronavirus Disease 2019显示文摘Coronavirus Disease 2019(COVID-19),caused by a novel coronavirus(SARS-Co V-2),is a highly contagious disease.It firstly appeared in Wuhan,Hubei province of China in December 2019.During the next two months,it moved rapidly throughout China.Most of the infected patients have mild symptoms including fever,fatigue and cough,but in severe cases,patients can progress rapidly and develop into acute respiratory distress syndrome,septic shock,metabolic acidosis and coagulopathy.The new coronavirus was reported to spread via droplets,contact and natural aerosols from human to human.Therefore,aerosol-producing procedures such as endotracheal intubation may put the anesthesiologists at high risk of nosocomial infections.In fact,SARSCo V-2 infection of anesthesiologists after endotracheal intubation for confirmed COVID-19 patients have been reported in hospitals in Wuhan.The expert panel of airway management in Chinese Society of Anaesthesiology has deliberated and drafted this recommendation,by which we hope to guide the performance of endotracheal intubation by frontline anesthesiologists and critical care physicians.During the airway management,enhanced droplet/airborne personal protective equitment(PPE)should be applied to the health care providers.A good airway assessment before airway intervention is of vital importance.For patients with normal airway,awake intubation should be avoided,and modified rapid sequence induction is strongly recommended.Sufficient muscle relaxant should be assured before intubation.For patients with difficult airway,good preparation of airway devices and detailed intubation plans should be made. | Mingzhang Zuo Yuguang Huang Wuhua Ma Zhanggang Xue Jiaqiang Zhang Yahong Gong Lu Che 无 | 2020 | Chinese Medical Sciences Journal2020，35，2： | 7 |
| 6 | Biocompatibility studies of silk fibroin-based artificial nerve grafts in vitro and in vivo显示文摘Silk fibroin(SF)has been used extensively in the biomedical field including tissue engineering for the generation of artificial bones,skins or ligaments.We have previously reported on good in vitro biocompatibility of SF fibers with peripheral nerve tissues and cells.In the present study,we developed a novel design of the SF-based artificial nerve graft(SF graft)which was composed of a SF-nerve guidance conduit(NGC)inserted with SF fibers.MTT assay was performed to determine the cytotoxicity of the SF-NGC extract fluid on the cultured L929 cells derived from an immortalized mouse fibroblast cell line.In addition,this SF graft was implanted into adult rats for bridging a 10-mm long sciatic nerve defect.The following-up experiments at initial stage(1-4 week)of nerve regeneration including routine blood tests and histochemical investigation were conducted to evaluate the in vivo biocompatibility of the SF graft with peripheral nerves.The results demonstrated that the SF-NGC graft was biocompatible with the surrounding tissues and cells due to its low inflammatory potential with a grade 0 under the U.S.Pharmacopeia guidelines and it was generally suitable to a certain degree for bridging peripheral nerve defects in virtue of supporting Schwann cell adherence,expansion and migration.Therefore the SF graft is a promising alternative to classical autografts for peripheral nerve repair. | Chen Xuemei Yang Yumin Wu Jian Zhao Yahong Ding Fei Gu Xiaosong | 2007 | Progress in Natural Science:Materials International2007，17，9： | 5 |
| 7 | Activation of TLR7 increases CCND3 expression via the downregulation of miR-15b in B cells of systemic lupus erythematosus显示文摘全身的豺狼座 erythematosus (SLE ) 是 B 房间 hyperreactivity 描绘的自体免疫的疾病。像使用费的受体 7 (TLR7 ) 表明小径反常地在 SLE B 房间被激活。CyclinD3 (CCND3 ) 在 B 房间增长,开发,和区别起一个重要作用。尽管以前的研究为自发的幼芽的中心的发展集中了于 TLR7 的 B 房间内在的角色,在 SLE B 房间的 CCND3 上的 TLR7 的影响仍然不是清楚的。这里,我们使用了介绍薄片的 B 房间并且发现 CCND3 与 SLE 有关并且显著地在 SLE B 房间提高了。而且,我们决定 CCND3 的表示水平更高,当 miR-15b 与正常题目相比在从 SLE 病人和 B6.MRL-Faslpr/J 豺狼座老鼠的 B 房间是显著地更低的时。而且,我们证明 TLR7 的激活戏剧性地增加了 CCND3 表示,但是显著地减少了在在 vitro 的 B 房间的 miR-15b 并且我们鉴别 CCND3 是 miR-15b 的一个直接目标。为了推进,证实我们的结果,我们由谈论地对待 C57BL/6 (B6 ) 建立了另一个豺狼座模型有为 8 个星期的 TLR-7 收缩筋 imiquimod (IMQ ) 的老鼠根据以前描述的协议。Expectedly,有 IMQ 的热门治疗显著地也增加了 CCND3 并且减少在 B6 老鼠的 B 房间的 miR-15b。一起拿,我们的结果鉴别 TLR7 的激活在 B cells; 经由 miR-15b 的 downregulation 增加了 CCND3 表示;因此,这些调查结果建议那外来的导致因素的 CCND3 表情可以在 SLE 贡献 B 房间的反常。 | Deshan Ren Fei Liu Guanjun Dong Ming You Jianjian Ji Yahong Huang Yayi Hou Hongye Fan | 2016 | Cellular & Molecular Immunology2016，13，6： | 5 |
| 8 | Modulation of nitrate-induced phosphate response by the MYB transcription factor RLI1/HINGE1 in the nucleus显示文摘The coordinated utilization of nitrogen(N)and phosphorus(P)is vital for plants to maintain nutrient balance and achieve optimal growth.Previously,we revealed a mechanism by which nitrate induces genes for phosphate utilization;this mechanism depends on NRT1.1B-facilitated degradation of cytoplasmic SPX4,which in turn promotes cytoplasmic-nuclear shuttling of PHR2,the central transcription factor of phosphate signaling,and triggers the nitrate-induced phosphate response(NIPR)and N-P coordinated utilization in rice.In this study,we unveiled a fine-tuning mechanism of NIPR in the nucleus regulated by Highly Induced by Nitrate Gene 1(HINGE1,also known as RLI1),a MYB-transcription factor closely related to PHR2.RLI1/HINGE1,which is transcriptionally activated by PHR2 under nitrate induction,can directly activate the expression of phosphate starvation-induced genes.More importantly,RLI1/HINGE1 competes with PHR2 for binding to its repressor proteins in the nucleus(SPX proteins),and consequently releases PHR2 to further enhance phosphate response.Therefore,RLI1/HINGE1 amplifies the phosphate response in the nucleus downstream of the cytoplasmic SPX4-PHR2 cascade,thereby enabling fine-tuning of N-P balance when nitrate supply is sufficient. | Zhihua Zhang Zhao Li Wei Wang Zhimin Jiang Liping Guo Xiaohan Wang Yangwen Qian Xiahe Huang Yongqiang Liu Xiujie Liu Yahong Liu Aifu Li Yu Yan Junpeng Xie Shouyun Cao Stanislav Kopriva Legong Li Fanjiang Kong Baohui Liu Yingchun Wang Bin Hu Chengcai Chu | 2021 | Molecular Plant2021，14，3： | 4 |
| 9 | The Construction of Active Source Repeated Monitoring in the Qilian Mountain, Gansu Province显示文摘The exciting source of the active source repeated monitoring is located in the Xiliushui Reservoir in Zhangye,Gansu Province. The system began operating normally on July 9,2015,and we had completed a period of 40 days of continuous excitation experiment before November 10,2015. Our results reveal that the airgun source has good consistency and repeatability,and the detective system of active source can record signal clearly. The construction of active source repeated exploration projects has achieved some results,which can provide valuable experience for the research of active source repeated exploration. The observation data we obtained makes it possible to follow the temporal and spatial variations of the deep structure of the Qilian Mountain areas. | Zhang Yuansheng Guo Xiao Qin Manzhong Liu Xuzhou Wei Congxin Shen Xuzhang Yan Wenhua Zou Rui Yin Liang Wang Yahong Sun Dianfeng Feng Hongwu Zhang Lifeng Guo Yingxia | 2016 | Earthquake Research in China2016，30，3： | 4 |
| 10 | Stable multi-label boosting for image annotation with structural feature selection显示文摘Automatic annotating images with appropriate multiple tags are very important to image retrieval and image understanding. We can obtain high-dimensional heterogenous visual features from real-world images to describe their various aspects of visual characteristics, such as color, texture, and shape. Different kinds of heterogenous features have different intrinsic discriminative power for image understanding. The selection of groups of discriminative features for certain semantics is hence crucial to make the image understanding more interpretable. This paper proposes an approach, called stable multi-label boosting with structural feature selection (S-MtBFS), for image annotation. S-MtBFS comprises two steps, namely structural feature selection for each label and stable multi-label boosting by curds and whey. In the first step, a (structural) sparse selection model is learned to identify subgroups of homogenous features for the purpose of predicting a certain label. Moreover, a stable method of multi-label boosting with a re-sampling policy is employed in the second step to utilize the correlations among multiple tags. Extensive experiments on public image datasets show that the proposed approach has better and stable performance of multi-label image annotation and leads to a quite interpretable model for image understanding. | ZHUANG YueTin HAN YaHong WU Fei YANG JiaCheng | 2011 | Science China(Information Sciences)2011，54，12： | 4 |
| 11 | Semiparametric estimation of a Box-Cox transformation model with varying coefficients model显示文摘This paper considers the estimation of a Box-Cox transformation model with varying coefficient. A two-step approach is proposed in which the first step estimates the varying coefficients nonparametrically for any given parameter α in the transformation function. Then a one-dimensional search of α has been employed based on some least absolute deviation criterion function. The validity of our estimator does not require independence assumption thus is robust to the conditional heteroscedasticity. A simulation study shows a reasonably well finite sample performance. Additionally, a comprehensive empirical study has been carefully examined. | JI YuanYuan WANG LiMing ZHANG HangHui ZHOU YaHong | 2017 | Science China Mathematics2017，60，5： | 4 |
| 12 | A dynamic panel data approach and HCW's method:Assessing the effect of China(Shanghai)Free Trade Zone on local GDP显示文摘We propose a simple-to-implement dynamic panel data method to evaluate the impacts of place-based policies.The idea is to exploit both the cross sectional dependence and the serial correlation within a panel and implement a semi difference-in-difference decomposition.Different from the method by Hsiao et al.(2012),the proposed model is easy to implement statistical inferences and can incorporate multiple treated groups at different time thresholds.We use the proposed method to explore the effect of the Free Trade Zone(FTZ)policy implemented in Shanghai at the end of 2013 on local GDP growth rate and compare it with that from Hsiao et al.(2012).The empirical results show that the FTZ does have a positive effect on the local GDP growth rate and it adds 1:21:8 percent point to the growth rate of the GDP per capita for Shanghai in 2014 which is about one fourth to one third of the total GDP growth rate per capita.This effect largely comes from the growth of the tertiary sector.The results lend support to the duplication of FTZ policy to other cities and provinces in China. | Jun Cai Kai Xin Yahong Zhou | 2021 | Journal of Management Science and Engineering2021，6，3： | 4 |
| 13 | Design of the reflection magnet and its shielding effect analysis for the neutral beam injector of EAST显示文摘In this paper,a reflection magnet to be installed in the EAST neutral beam injection system is simulated and designed.The field intensity of reflection magnet of 42-cm maximum bending radius is about 1.539×10-1 T for 100 keV deuterium beam.The shielding cage is formed by rods.Using the ANSOFT software,the magnetic shielding effect was estimated at about 3% at the magnet pole region. | LIANG Lizhen HU Chundong XIE Yuanlai WEI Jianglong XIE Yahong LI Jun | 2011 | Nuclear Science and Techniques2011，22，2： | 4 |
| 14 | FRACTAL DIMENSION OF TIME SERIES APPLIED TO IDENTIFICATION OF CRITICAL SPEED OF JEFFCOTT ROTOR SYSTEM显示文摘The dynamical behaviors of logistic map(May’s model) and duffing equation are studiedthrough fractal dimension of time series at different parameters. It is shown that the parameters ofdynamical behaviors can be identified effectively by the curve of fractal dimension with parameterincrements. For further verification, the relation between the fractional dimension of time series androtational speed can be used to identify critical speed effectively by using this method to a plate Jef-foctt rotor system. The numerical and experimental result indicates that the identification of criticalparameters is effective. | Zhao Yucheng Sun Kun Zhang Yahong Xu Qingyu | 2005 | Chinese Journal of Mechanical Engineering2005，18，3： | 3 |
| 15 | Super-resolution imaging and tracking of TGF-β receptor II on living cells显示文摘Single-particle tracking photoactivated localization microscopy(spt PALM) has recently emerged as a powerful tool for high-density imaging and tracking of individual molecules in living cells. In this work, we have monitored and compared the diffusion dynamics of TGF-b type II receptor(Tb RII) at high expression level using both traditional single-particle tracking(SPT) and spt PALM.The ligand-induced aggregation of Tb RII oligomers was further indicated by spt PALM. Due to the capacity of distinguishing and tracking single molecules within diffraction limit, spt PALM outperforms traditional SPT by providing more accurate biophysical information. | Zi Ye Nan Li Libo Zhao Yahong Sun Hefei Ruan Mingliang Zhang Jinghe Yuan Xiaohong Fang | 2016 | Science Bulletin2016，61，8： | 3 |
| 16 | Nanoparticle mediated controlled delivery of dual growth factors显示文摘Peripheral nerve functional recovery after nerve injury generally requires multiple growth factors by synergistic effect.However,the optical combination of multiple synergistic growth factors for axonal regeneration has been scarcely considered up to now.Meanwhile,the use of growth factors in promoting nerve regeneration was limited by its short biological half-life in vivo,its vulnerability to structure disruption or hydrolyzation,leading to loss of bioactivity.Herein,a novel polymeric nanoparticle delivery system composed of heparin andε-poly-L-lysine(PL)was prepared for control release of nerve growth factor(NGF)and basic fibroblast growth factor(bFGF).The nanoparticles were synthesized by polyelectrolyte complexation in aqueous solution at room temperature,followed by cross-linking with biological genipin.The obtained nanoparticles had a spherical shape,with a mean diameter of about 246 nm,and high growth factors encapsulation efficiency as well as good stability.NGF and bFGF were encapsulated in the nanoparticles and showed a continuous and slow release behavior in vitro.The bioactivities of the released growth factors were evaluated,and exhibited the synergistic effect.The controlled release of the dual synergistic growth factors would improve the treatment of peripheral nerve injury to mimic the natural cellular microenvironments. | ZHANG LuZhong ZHOU YouLang LI GuiCai ZHAO YaHong GU XiaoSong YANG YuMin | 2014 | Science China(Life Sciences)2014，57，2： | 3 |
| 17 | A multifunctional cross-validation high-throughput screening protocol enabling the discovery of new SHP2 inhibitors显示文摘The protein tyrosine phosphatase Src homology phosphotyrosyl phosphatase 2(SHP2) is implicated in various cancers, and targeting SHP2 has become a promising therapeutic approach. We herein described a robust cross-validation high-throughput screening protocol that combined the fluorescence-based enzyme assay and the conformation-dependent thermal shift assay for the discovery of SHP2 inhibitors. The established method can effectively exclude the false positive SHP2 inhibitors with fluorescence interference and was also successfully employed to identify new protein tyrosine phosphatase domain of SHP2(SHP2-PTP) and allosteric inhibitors. Of note, this protocol showed potential for identifying SHP2 inhibitors against cancer-associated SHP2 mutation SHP2-E76 A. After initial screening of our in-house compound library(w2300 compounds), we identified 4 new SHP2-PTP inhibitors(0.17%hit rate) and 28 novel allosteric SHP2 inhibitors(1.22% hit rate), of which SYK-85 and WS-635 effectively inhibited SHP2-PTP(SYK-85: IC_(50) Z 0.32 mmol/L;WS-635: IC_(50) Z 4.13 mmol/L) and thus represent novel scaffolds for designing new SHP2-PTP inhibitors. TK-147, an allosteric inhibitor, inhibited SHP2 potently(IC_(50) Z 0.25 mmol/L). In structure, TK-147 could be regarded as a bioisostere of the well characterized SHP2 inhibitor SHP-099, highlighting the essential structural elements for allosteric inhibition of SHP2. The principle underlying the cross-validation protocol is potentially feasible to identify allosteric inhibitors or those inactivating mutants of other proteins. | Yihui Song Min Zhao Yahong Wu Bin Yu Hong-Min Liu | 2021 | Acta Pharmaceutica Sinica B2021，11，3： | 2 |
| 18 | Experimental Design in the Analysis of Interferential Effects for the Determination of Rubidium in Chloride-type Brine by Atomic Absorption Spectrometry Technique显示文摘试验性的设计(雌动物) 被采用精确在 Qionglai 的氯化物类型盐水决定金如的内容(在四川省的一个城市,中国的西南) 使用的原子吸收 spectrometry (AAS ) 技术。从六个因素的统计分析,它被发现那 K+ , Cl 是为金如的决心的重要介入元素。一个模型被建立消除 K+ 和 Cl 的干扰效果。试验性的结果显示在最佳的条件下面,为金如决心的发达方法拥有低察觉限制的优点(0.019 六 ?? ㄠ ???? | Gao, Dandan Dong, Yaping Li, Wu Xu, Bin Li, Yahong | 2011 | Chinese Journal of Chemistry2011，29，9： | 2 |
| 19 | Genomic and transcriptomic analysis unveils population evolution and development of pesticide resistance in fall armyworm Spodoptera frugiperda显示文摘The fall armyworm(FAW),Spodoptera frugiperda,is a destructive pest native to America and has recently become an invasive insect pest in China.Because of its rapid spread and great risks in China,understanding of FAW genetic background and pesticide resistance is urgent and essential to develop effective management strategies.Here,we assembled a chromosome-level genome of a male FAW(SFynMstLFR)and compared re-sequencing results of the populations from America,Africa,and China.Strain identification of 163 individuals collected from America,Africa and China showed that both C and R strains were found in the American pop-ulations,while only C strain was found in the Chinese and African populations.Moreover,population geno-mics analysis showed that populations from Africa and China have close relationship with significantly genetic differentiation from American populations.Taken toge-ther,FAWs invaded into China were most likely origi-nated from Africa.Comparative genomics analysis displayed that the cytochrome p450 gene family is extremely expanded to 425 members in FAW,of which 283 genes are specific to FAW.Treatments of Chinese populations with twenty-three pesticides showed the variant patterns of transcriptome profiles,and several detoxification genes such as AOX,UGT and GST spe-cially responded to the pesticides.These findings will be useful in developing effective strategies for manage-ment of FAW in China and other invaded areas. | Furong Gui Tianming Lan Yue Zhao Wei Guo Yang Dong Dongming Fang Huan Liu Haimeng Li Hongli Wang Ruoshi Hao Xiaofang Cheng Yahong Li Pengcheng Yang Sunil Kumar Sahu Yaping Chen Le Cheng Shuqi He Ping Liu Guangyi Fan Haorong Lu Guohai Hu Wei Dong Bin Chen Yuan Jiang Yongwei Zhang Hanhong Xu Fei Lin Bernard Slippers Alisa Postma Matthew Jackson Birhan Addisie Abate Kassahun Tesfaye Aschalew Lemma Demie Meseret Destaw Bayeleygne Dawit Tesfaye Degefu Feng Chen Paul K.Kuria Zachary M.Kinyua Tong-Xian Liu Huanming Yang Fangneng Huang Xin Liu Jun Sheng Le Kang | 2022 | Protein & Cell2022，13，7： | 2 |
| 20 | Flow characteristics and reaction properties of carbon dioxide in microtubules and porous media显示文摘Carbon dioxide reacts with porous media while flowing through them enhancing their permeability.Its flow behavior as well as the permeability enhancement effects were studied in synthetic cores,natural cores and microtubes with an inner diameter of 5 μm.The results show that the permeability of H2O-saturated cores(containing carbonate ingredients) was enhanced by increasing the injection volume of a CO2-H2O solution.This enhancement is attributable to carbon dioxide's corrosion,which is justified by SEM scanning.The same phenomenon occurs with a CO2-H2O solution in microtubes,but for a different reason.The gas flow velocity of carbon dioxide in microtubes was approximately 100% faster than that of nitrogen because of the scale and the squeezing effects.Carbon dioxide molecules dissolved in water accelerate the diffusion rate of water molecules within the boundary layer,which in turn diminishes the thickness of the water film and enlarges the effective pore size.This flow behavior facilitates the injection of carbon dioxide into low-permeability reservoirs for oil-displacement and formation energy buildup purposes.This behavior also increases the potential for carbon dioxide channeling or release from the formation. | ZHAO RenBao YUE XiangAn WU YaHong XU ShaoLiang WANG Fei HOU YongLi | 2008 | Chinese Science Bulletin2008，53，21： | 2 |
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