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139篇 您的检索式:作者名="Mi Shen"
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1Controlled attenuation parameter for non-invasive assessment of hepatic steatosis in Chinese patients显示文摘AIM:To evaluate the performance of a novel non-invasive controlled attenuation parameter(CAP)to assess liver steatosis.METHODS:This was a multi-center prospective cohort study.Consecutive patients(aged≥18 years)who had undergone percutaneous liver biopsy and CAP measurement were recruited from three Chinese liver centers.Steatosis was categorized as S0:<5%;S1:5%-33%;S2:34%-66%;or S3:≥67%,according to the nonalcoholic fatty liver disease(NAFLD)activity score.The FibroScan?502 equipped with the M probe(Echosens,Paris,France)was used to capture both CAP and liver stiffness measurement values simultaneously.Receiver operating characteristic curves were plotted,and the areas under the curves were calculated to determine the diagnostic efficacy.The accuracy of the CAP values at the optimal thresholds was defined by maximizing the sum of sensitivity and specificity(maximum Youden index).RESULTS:A total of 152 patients were recruited,including 52(34.2%)patients with NAFLD and 100(65.8%)with chronic hepatitis B(CHB)virus infection.After adjustment,the steatosis grade(OR=37.12;95%CI:21.63-52.60,P<0.001)and body mass index(BMI,OR=6.20;95%CI:2.92-9.48,P<0.001)were found independently associated with CAP by multivariate linear regression analysis.CAP was not influenced by inflammation,fibrosis or aetiology.The median CAP values and interquartile ranges among patients with S0,S1,S2 and S3 steatosis were 211(181-240)dB/m,270(253-305)dB/m,330(302-360)dB/m,and 346(313-363)dB/m,respectively.The cut-offs for the CAP values in all patients with steatosis≥5%,≥34%and≥67%were 253 dB/m,285 dB/m and 310 dB/m,respectively.The areas under the curves were 0.92,0.92and 0.88 for steatosis≥5%,≥34%and≥67%,respectively.No significant differences were found in the CAP values between the NAFLD group and the CHB group in each steatosis grade.CONCLUSION:CAP appears to be a promising tool for the non-invasive detection and quantification of hepatic steatosis,but is limited by BMI.Feng Shen Rui-Dan Zheng Yu-Qiang Mi Xiao-Ying Wang Qin Pan Guang-Yu Chen Hai-Xia Cao Ming-Li Chen Liang Xu Jian-Neng Chen Yi Cao Rui-Nan Zhang Lei-Ming Xu Jian-Gao Fan 2014World Journal of Gastroenterology2014,20,16:55
2Arabidopsis NIP3;1 Plays an Important Role in Arsenic Uptake and Root-to-Shoot Translocation under Arsenite Stress Conditions显示文摘在 Arabidopsis, nodulin 26-like 内在的蛋白质(捏) aquaporin 蛋白质的亚科由九个成员,组成哪个中的五个(NIP1; 1, NIP1; 2, NIP5; 1, NIP6; 1,并且 NIP7; 1 ) 以前被识别对亚砷酸盐可渗透。然而,角色在植物在亚砷酸盐的 root-to-shoot translocation 捏仍然保持糟糕理解。在这研究,用反向的基因策略, Arabidopsis NIP3; 1 被识别在亚砷酸盐压力条件下面在砷举起和 root-to-shoot 分发起一个重要作用。nip3; 1 loss-of-function 异种在亚砷酸盐忍耐显示了明显的改进为未葬生长和积累的更少砷在野类型的植物比那些射击,而 nip3; 1 nip1; 1 两倍异种显示出强壮的亚砷酸盐忍耐并且在亚砷酸盐压力条件下面改进了根和射击的生长。一个倡导者 -- glucuronidase 分析揭示了那 NIP3; 1 几乎专门在根被表示(与根尖端的异常) ,并且在酵母 Saccharomyces cerevisiae 的 heterologous 表示表明了那 NIP3; 1 能调停亚砷酸盐运输。一起拿,我们的结果建议那 NIP3; 1 在 Arabidopsis 涉及亚砷酸盐举起和 root-to-shoot translocation,可能作为被动、双向的亚砷酸盐 transporter。WenzhongXu Wentao Dai Huili Yan Sheng Li Hongling Shen Yanshan Chen Hua Xu Yangyang Sun Zhenyan He Mi Ma 2015Molecular Plant2015,8,5:13
3Linked PNPLA3 polymorphisms confer susceptibility to nonalcoholic steatohepatitis and decreased viral load in chronic hepatitis B显示文摘AIM:To investigate the association of PNPLA3 polymorphisms with concurrent chronic hepatitis B(CHB) and nonalcoholic fatty liver disease(NAFLD).METHODS:A cohort of Han patients with biopsyproven CHB,with or without NAFLD(CHB group,n = 51;CHB + NAFLD group,n = 57),and normal controls(normal group,n = 47) were recruited from Northern(Tianjin),Central(Shanghai),and Southern(Zhangzhou) China.Their PNPLA3 polymorphisms were genotyped by gene sequencing.The association between PNPLA3 polymorphisms and susceptibility to NAFLD,and clinical characteristics of NAFLD were evaluated on the basis of physical indices,liver function tests,glycolipid metabolism,and histopathologic scoring.The association of PNPLA3 polymorphisms and hepatitis B virus(HBV) load was determined by the serum level of HBV DNA.RESULTS:After adjusting for age,sex,and body mass index,we found that four linked single nucleotide polymorphisms(SNPs) of PNPLA3,including the rs738409 G allele(CHB + NAFLD group vs CHB group:odds ratio[OR]= 2.77,95%confidence interval[CI]:1.18-6.54;P = 0.02),rs3747206 T allele(CHB+ NAFLD group vs CHB group:OR = 2.77,95%CI:1.18-6.54;P = 0.02),rs4823173 A allele(CHB +NAFLD group vs CHB group:OR = 2.73,95%CI:1.16-6.44;P= 0.02),and rs2072906 G allele(CHB+ NAFLD group vs CHB group:OR = 3.05,95%CI:1.28-7.26;P = 0.01),conferred high risk to NAFLD in CHB patients.In patients with both CHB and NAFLD,these genotypes of PNPLA3 polymorphisms were associated with increased susceptibility to nonalcoholic steatohepatitis(NASH)(NAFLD activity score ≥3;P =0.01-0.03) and liver fibrosis(>1 Metavir grading;P =0.01-0.04).As compared to those with C/C and C/G at rs738409,C/C and C/T at rs3747206,G/G and G/A at rs4823173,and A/A and A/G at rs2072906,patients in the CHB + NAFLD group with G/G at rs738409,T/T at rs3747206,A/A at rs4823173,and G/G at rs2072906 showed significantly lower serum levels of HBV DNA(P< 0.01-0.05).CONCLUSION:Four linked SNPs of PNPLA3(rs738409,rs3747206,rs4823173,and rs2072906) are correlated with susceptibility to NAFLD,NASH,liver fibrosis,and HBV dynamics in CHB patients.Qin Pan Rui-Nan Zhang Yu-Qin Wang Rui-Dan Zheng Yu-Qiang Mi Wen-Bin Liu Feng Shen Guang-Yu Chen Jia-Fa Lu Chan-Yan Zhu Shu-Yi Zhang Yi-Ming Chen Wan-Lu Sun Jian-Gao Fan 2015World Journal of Gastroenterology2015,21,28:12
4Determination of paleo-pressure for a natural gas pool formation based on PVT characteristics of fluid inclusions in reservoir rocks——A case study of Upper-Paleozoic deep basin gas trap of the Ordos Basin显示文摘It has been proved to be a difficult problem to determine directly trapping pressure of fluid inclusions. Recently, PVT simulation softwares have been applied to simulating the trapping pressure of petroleum inclusions in reservoir rocks, but the reported methods have many limita- tions in practice. In this paper, a method is suggested to calculating the trapping pressure and temperature of fluid inclusions by combining the isochore equations of a gas-bearing aqueous inclusion with its coeval petroleum inclusions. A case study was conducted by this method for fluid inclusions occurring in the Upper-Paleozoic Shanxi Formation reservoir sandstones from the Ordos Basin. The results show that the trapping pressure of these inclusions ranges from 21 to 32 MPa, which is 6─7 MPa higher than their minimum trapping pressure although the trapping temperature is only 2─3℃ higher than the homogenization temperature. The trapping pressure and temperature of the fluid inclusions decrease from southern area to northern area of the basin. The trapping pressure is obviously lower than the state water pressures when the inclusions formed. These data are consistent with the regional geological and geochemical conditions of the basin when the deep basin gas trap formed.MI Jingkui1,2,XIAO Xianming1,LIU Dehan1,& SHEN Jiagui1 1.State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China 2.Institute of Sedimentary Mineral and Resources,Department of Civil Engineering,Xiangtan Polytechnic University,Xiangtan 411201,China 2004Science China Earth Sciences2004,47,6:10
5The Development of A Fluorescence Polarization Immunoassay for Aflatoxin Detection显示文摘A fluorescence polarization immunoassay(FPIA)was developed for the analysis ofaflatoxins(AFs)using an anti-aflatoxin B1(AFB1)monoclonal antibody and a novel fluorescein-labeled AFB1tracer.The FPIA showed an IC50 value of 23.33ng/mL with a limit of detection of 13.12 ng/mL for AFB1.The cross-reactivities of AFB1,AFB2,AFG1,AFG2,AFM1,and AFM2 with the antibody were100%,65.7%,143%,23.5%,111.4%,and 2%,respectively.The group-specificity of anti-AFB1mAb indicated that the FPIA could potentially be used in a screening method for the detection of total AFs,albeit not AFG2 and AFM2.The total time required for analyzing 96 samples in one microplate was less than 5 min.This study demonstrates the potential usefulness of the FPIA as a rapid and simple technique for monitoring AFs.SHENG Ya Jie EREMIN Sergei MI Tie Jun ZHANG Su Xia SHEN Jian Zhong WANG Zhan Hui 2014Biomedical and Environmental Sciences2014,27,2:10
6Blood perfusion of the contralateral testis evaluated with contrast-enhanced ultrasound in rabbits with unilateral testicular torsion显示文摘The changes of blood perfusion of contralateral testis after unilateral testicular torsion remain controversial.In this study,28 New Zealand white male rabbits were randomly divided into five groups.Group A(n=8),the control group,underwent a sham operation on the unilateral testis without inducing testicular torsion.In groups B,C,and D(n=5 each),unilateral testicular torsion was induced,and,after 3,6 or 24 h,respectively,detorsion was performed.In group E(n=5),permanent unilateral testicular torsion was applied.Contrast-enhanced ultrasound was used to observe the blood perfusion of the contralateral testis at the following stages:pre-torsion(preopration),immediately post-torsion(postopration),pre-detorsion,immediately post-detorsion,and late-stage post-detorsion(6-12 h post-detorsion in groups B-D)or at a similar time point(15-21 h post-torsion in group E).Time-intensity curves were generated,and the following parameters were derived and analyzed:arrival time,time to peak intensity,peak intensity,and half-time of the descending peak intensity.The analysis revealed that blood perfusion of the contralateral testis increased immediately after testicular torsion on the opposite side(P<0.05),which increased with prolonged testicular torsion of the other testis.This research demonstrated that contrast-enhanced ultrasound was valuable in evaluating blood perfusion of the contralateral testis after unilateral testicular torsion.Lin Chen Wei-Wei Zhan Zhou-Jun Shen Wen-Bin Rui Chen Lv Man Chen Jian-Qiao Zhou Ping Zhou Mi Zhou Ying Zhu 2009Asian Journal of Andrology2009,11,2:10
7Neurovascular unit in diabetic retinopathy:pathophysiological roles and potential therapeutical targets显示文摘Diabetic retinopathy(DR),one of the common complications of diabetes,is the leading cause of visual loss in working-age individuals in many industrialized countries.It has been traditionally regarded as a purely microvascular disease in the retina.However,an increasing number of studies have shown that DR is a complex neurovascular disorder that affects not only vascular structure but also neural tissue of the retina.Deterioration of neural retina could precede microvascular abnormalities in the DR,leading to microvascular changes.Furthermore,disruption of interactions among neurons,vascular cells,glia and local immune cells,which collectively form the neurovascular unit,is considered to be associated with the progression of DR early on in the disease.Therefore,it makes sense to develop new therapeutic strategies to prevent or reverse retinal neurodegeneration,neuroinflammation and impaired cell-cell interactions of the neurovascular unit in early stage DR.Here,we present current perspectives on the pathophysiology of DR as a neurovascular disease,especially at the early stage.Potential novel treatments for preventing or reversing neurovascular injuries in DR are discussed as well.Shen Nian Amy C.Y.Lo Yajing Mi Kai Ren Di Yang 2021Eye and Vision2021,8,1:9
8The role of chloroplast NAD(P)H dehydrogenase in protection of tobacco plant against heat stress显示文摘After incubation at 42℃ for more than 48 h, brown damages occurred on the stems of tobacco (Nicotiana tabacum L.) ndhC-ndhK-ndhJ deletion mutant (?ndhCKJ), followed by wilt of the leaves, while less the phenotype was found in its wild type (WT). Analysis of the kinetics of post-illumination rise in chlorophyll fluorescence indicated that the PSI cyclic electron flow and the chlororespiration mediated by NAD(P)H dehydrogenase (NDH) was significantly enhanced in WT under the high temperature. After leaf disks were treated with methyl viologen (MV), photosynthetic apparatus of ?ndhCKJ exhibited more severe photo-oxidative damage, even bleaching of chlorophyll. Analysis of P700 oxidation and reduction showed that the NDH mediated cyclic electron flow probably functioned as an electron competitor with Mehler reaction, to reduce the accumulation of reactive oxygen species (ROS). When leaf disks were heat stressed at 42℃ for 6 h, the photochemical activity declined more markedly in ?ndhCKJ than in WT, accompanied with more evident decrease in the amount of soluble Rubisco activase. In addition, the slow phase of millisecond-delayed light emission (ms-DLE) of chlorophyll fluorescence indicated that NDH was involved in the building-up of transthy-lakoid proton gradient (?pH), while the consumption of ?pH was highly inhibited in ?ndhCKJ after heat stress. Based on the results, we supposed that the cyclic electron flow mediated by NDH could be stimulated under the heat stressed conditions, to divert excess electrons via chlororespiration pathway, and sustain CO2 assimilation by providing extra ?pH, thus reducing the photooxidative damage.WANG Peng YE Jiyu SHEN Yungang MI Hualing 2006Science China(Life Sciences)2006,49,4:8
9Endophytes and their role in phytoremediation显示文摘Many endophytes have been found to be resistant to heavy metals and/or capable of degrading organic contaminants,and endophyte-assisted phytoremediation has been documented as a promising technology for in situ remediation of contaminated soils.During the phytoremediation of heavy metals,the heavy-metal-resistant endophytes can enhance plant growth,decrease metal phytotoxicity,and affect metal translocation and accumulation in plants.For the phytoremediation of organic contaminants,endophytes can produce various enzymes to degrade organic contaminants and reduce both the phytotoxicity and evapotranspiration of volatile contaminants.This paper reviews the diversity of contaminant-resistant/degrading endophytes and their role in phytoremediation and discusses some issues that have been raised surrounding this area of research.Hai-Yan Li Da-Qiao Wei Mi Shen Zuo-Ping Zhou 2012Fungal Diversity2012,,3:8
10Dating formation of natural gas pools using fluid inclusion data from reservoirs显示文摘A method has been suggested which is based on the homogenization temperatures and other data of fluid inclusions from a reservoir rock, with the combination of burial and geothermal history of the hosted rock, to date the gas reservoir formation. On the basis of this, a case study of the Carboniferous-Permian gas pools in the Ordos Basin has been conducted. The results have shown that the reservoir sandstones of the gas pool were filled by gases during 125-150 Ma, earlier in the southern area and later in the northern area, which is consistent with the basin’s geological and geochemical background under which the gas pools formed.Xianming Xiao Zufa Liu Jiaku Mi Dehan Liu Jiagui Shen Zhiguang Song 2002Chinese Science Bulletin2002,47,18:6
11Earth Observation Brain(EOB):an intelligent earth observation system显示文摘Since the twenty-first century,with the rapid development of high-resolution earth observation satellites,the earth observation satellite system has developed from the initial single satellite observation model to the current satellite constellation formed by light and small satellites observation model.All-weather and all-directional fine earth observation can now be realized.In the future,the satellite constellation,communication satellites,navigation satellites,and aircrafts are linked through dynamic linking network to form an air-space information network to realize real-time services of intelligent air-space information.To further enhance the perception,cognition,and quick response ability of the network,we propose the concept and model of the Earth Observation Brain(EOB)−the intelligent earth system based on events perception in this paper.Then,some key technologies needed to be solved in the EOB are also described.An application example is illustrated to show the process of perception and cognition in the primary stage of the EOB.In the future,EOB can observe what change of what object,the when and where to push these right information to mobile terminal of right people at the right time and right place.Global users can obtain any data,information,and knowledge in real-time through the EOB.Deren Li Mi Wang Zhipeng Dong Xin Shen Lite Shi 2017Geo-Spatial Information Science2017,20,2:6
12Changes in microtubule-associated protein tau during peripheral nerve injury and regeneration显示文摘Tau,a primary component of microtubule-associated protein,promotes microtubule assembly and/or disassembly and maintains the stability of the microtubule structure.Although the importance of tau in neurodegenerative diseases has been well demonstrated,whether tau is involved in peripheral nerve regeneration remains unknown.In the current study,we obtained sciatic nerve tissue from adult rats 0,1,4,7,and 14 days after sciatic nerve crush and examined tau m RNA and protein expression levels and the location of tau in the sciatic nerve following peripheral nerve injury.The results from our quantitative reverse transcription polymerase chain reaction analysis showed that compared with the uninjured control sciatic nerve,m RNA expression levels for both tau and tau tubulin kinase 1,a serine/threonine kinase that regulates tau phosphorylation,were decreased following peripheral nerve injury.Our western blot assay results suggested that the protein expression levels of tau and phosphorylated tau initially decreased 1 day post nerve injury but then gradually increased.The results of our immunohistochemical labeling showed that the location of tau protein was not altered by nerve injury.Thus,these results showed that the expression of tau was changed following sciatic nerve crush,suggesting that tau may be involved in peripheral nerve repair and regeneration.Guang-bin Zha Mi Shen Xiao-song Gu Sheng Yi 2016Neural Regeneration Research2016,11,9:5
13Low concentrations of NaHSO_3 enhance NAD(P)H dehydrogenasedependent cyclic photophosphorylation and alleviate the oxidative damage to improve photosynthesis in tobacco显示文摘Bisulfite at low concentrations(L-NaHSO3) increases cyclic electron transport around photosystem I(PSI) and photosynthesis.However,little is known regarding the detailed contribution of cyclic electron transport to the promoted photosynthesis by L-NaHSO3.In the present work,we used tobacco mutant defective in ndhC-ndhK-ndhJ(ndhCKJ) to investigate the role of NAD(P)H dehydrogenase(NDH)-dependent cyclic electron transport around PSI in an increase in photosynthesis by L-NaHSO3.After the treatment of tobacco leaves with L-NaHSO3(10 μmol L-1),the NDH-dependent cyclic electron transport,monitored by a transient post-illumination increase in Chl fluorescence and the amount of NDH,was notably up-regulated in wild type(WT).The NDH-dependent cyclic electron transport was severely impaired in ndhCKJ and was not significantly affected by treatment with L-NaHSO3.Accordingly,the NDH-dependent transthylakoid membrane proton gradient(pH),as reflected by the slow phase of millisecond-delayed light emission(ms-DLE),was increased by L-NaHSO3 in WT,but not in ndhCKJ;the enhancement of cyclic photophosphorylation(PSP) activity by L-NaHSO3 was more obvious in WT than ndhCKJ.The accumulation of both superoxide and hydrogen peroxide was reduced in WT when subjected to L-NaHSO3 treatment,but not in ndhCKJ.Furthermore,the increase of photosynthetic O 2 evolution rate by L-NaHSO3 was more significant in WT than in ndhCKJ.We therefore conclude that L-NaHSO3 alleviates the photo-oxidative damage by the enhancement of NDH-dependent cyclic PSP,thereby improving photosynthesis.WU YanXia HE Wei MA WeiMin SHEN YunKang MI HuaLing 2012Chinese Science Bulletin2012,57,30:5
14Measurement of γ detector backgrounds in the energy range of 3-8 MeV at Jinping underground laboratory for nuclear astrophysics显示文摘The astrophysical reaction rate of the charged-particleinduced reaction is dominated by the cross section within the Gamow window.The total cross section σ(E)of a chargedparticle-induced reaction is known to drops steeply with decreasing energy owing to the Coulomb barrier in the entrance channel:YangPing Shen Jun Su WeiPing Liu Gang Lian Lin Gan LvHua Qiao ShengQuan Yan Yong Zhou Qian Yue Zhi Zeng QingDong Hu YuHao Mi Wei Zhao 2017Science China(Physics,Mechanics & Astronomy)2017,60,10:5
15Effects of estradiol and progesterone on the proinflammatory cytokine production by mononuclear cells from patients with chronic hepatitis C显示文摘AIM:To investigate the effects of estradiol (E2) and progesterone on the unstimulated and oxidative stressstimulated production of tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-8, and macrophage chemotactic protein (MCP)-1 by peripheral blood mononuclear cells (PBMCs) from patients with chronic hepatitis C and healthy controls. METHODS:The PBMCs were separated from agematched 72 males and 71 females with and without chronic hepatitis C, who were divided into two groups based on a mean menopausal age of 50 years. Oxidative stress was induced by hydrogen peroxide in the cells incubated in serum-free media. Cytokines in the culture supernatant were measured by an enzyme-linked immunosorbent assay. RESULTS:The highest levels of the spontaneous production of TNF-α, IL-1β, IL-8, and MCP-1 by the unstimulated PBMCs were in the older male patients with chronic hepatitis C and the lowest levels were in the premenopausal female healthy controls. E2 inhibited the cytokine production by the unstimulated PBMCs from the older male and post-menopausal female patients, which was further stimulated by progesterone. The exposure to hydrogen peroxide in the PBMCs from the younger male and pre-menopausal female healthy subjects induced the production of cytokines. The change rates of the hydrogen peroxide-stimulated cytokine production were suppressed by E2 and enhanced by progesterone. CONCLUSION:These findings suggest that E2 may play a favorable role in the course of persistent liver injury by preventing the accumulation of monocytes-macrophages and by inhibiting proinflammatory cytokine production, whereas progesterone may counteract the favorable E2 effects.Ying Yuan Ichiro Shimizu Mi Shen Eriko Aoyagi Hidetaka Takenaka Tatuzo Itagaki Mari Urata Katsutaka Sannomiya Nao Kohno Katsuyoshi Tamaki Masayuki Shono Tetsuji Takayama 2008World Journal of Gastroenterology2008,14,14:5
16Concentration and distribution of entanglement based on valley qubits system in graphene显示文摘Exploiting the optical excitation selection rules in graphene quantum dots, we investigate theoretically the entanglement generation process and entanglement concentration process of valley qubits. Our protocol shows that the graphene-based quantum dots can be distributed in a maximally entangled state through the interaction with single photons. In our proposed scheme, the setups are simplified as only single-photon detection is required. This provides a fast, all-optical manipulation of on-chip qubits,which gives an effective way for quantum information processing in graphene-based solid qubits.Chuan Wang Wei-Wei Shen Si-Chen Mi Yong Zhang Tie-Jun Wang 2015Science Bulletin2015,60,23:4
17Differences in atheroma between Caucasian and Asian subjects with anterior stroke:A vessel wall MRI study显示文摘Background and purpose While extracranial carotid artery stenosis is more common among Caucasians and intracranial artery stenosis is more common among Asians,the differences in atherosclerotic plaque characteristics have not yet been extensively examined.We sought to investigate plaque location and characteristics within extracranial carotid and intracranial arteries in symptomatic Caucasians and Chinese using vessel wall MRI.Methods Subjects with recent anterior circulation ischaemic stroke were recruited and imaged at two sites in the USA and China using similar protocols.Both extracranial carotid and intracranial arteries were reviewed to determine plaque location and characteristics.Results The prevalence of extracranial carotid plaque in Caucasians and Chinese was 73.1%and 49.1%,respectively(p=0.055).Prevalence of intracranial plaque was 38.5%and 69.1%in Caucasians and Chinese,respectively(p=0.02).Furthermore,42% of Caucasians and 16%of Chinese had high-risk plaque(HRP)features(intraplaque haemorrhage,luminal surface disruption)in the extracranial carotid artery(p=0.03).The prevalence of HRP features in intracranial arteries was not significantly different between the two cohorts(4%vs 11%;p=0.42).Conclusions Differences in the location and characteristics of cerebrovascular atherosclerosis were identified by vessel wall MRI in US Caucasian and Chinese subjects with recent anterior circulation ischaemic stroke.Extracranial carotid plaques with HRP features were more common in Caucasians.Intracranial plaques were more common in Chinese subjects,but no significant difference between the two cohorts in intracranial HRP prevalence was found.Larger studies using vessel wall imaging to investigate racial differences in cerebrovascular disease may inform underlying mechanisms of HRP development and may ultimately help guide appropriate therapy.Hiroko Watase Mi Shen Binbin Sui Peiyi Gao Dong Zhang Jie Sun Niranjan Balu Daniel S Hippe Gail P Jarvik Xihai Zhao Rui Li Shuo Chen Chun Yuan Thomas S Hatsukami 2021Stroke & Vascular Neurology2021,6,1:4
18Imposing Active Sources during High-Frequency Passive Surface-Wave Measurement显示文摘Feng Cheng Jianghai Xia Chao Shen Yue Hu Zongbo Xu Binbin Mi 2018Engineering2018,4,5:3
19A Multifunctional Anti-Proton Electrolyte for High-Rate and Super-Stable Aqueous Zn-Vanadium Oxide Battery显示文摘Large volumetric expansion of cathode hosts and sluggish transport kinetics in the cathode–electrolyte interface,as well as dendrite growth and hydrogen evolution at Zn anode side are considered as the system problems that cause the electrochemical failure of aqueous Zn-vanadium oxide battery.In this work,a multifunctional anti-proton electrolyte was proposed to synchronously solve all those issues.Theoretical and experimental studies confirm that PEG 400 additive can regulate the Zn^(2+) solvation structure and inhibit the ionization of free water molecules of the electrolyte.Then,smaller lattice expansion of vanadium oxide hosts and less associated by-product formation can be realized by using such electrolyte.Besides,such electrolyte is also beneficial to guide the uniform Zn deposition and suppress the side reaction of hydrogen evolution.Owing to the integrated synergetic modifica-tion,a high-rate and ultrastable aqueous Zn-V_(2)O_(3)/C battery can be constructed,which can remain a specific capacity of 222.8 m Ah g^(-1)after 6000 cycles at 5 A g^(-1),and 121.8 m Ah g^(-1) even after 18,000 cycles at 20 A g^(-1),respectively.Such“all-in-one”solution based on the electrolyte design provides a new strategy for developing high-performance aqueous Zn-ion battery.Yangwu Chen Dingtao Ma Kefeng Ouyang Ming Yang Sicheng Shen Yanyi Wang Hongwei Mi Lingna Sun Chuanxin He Peixin Zhang 2022Nano-Micro Letters2022,14,9:3
20Tool Orientation Optimization and Path Planning for 5-Axis Machining显示文摘Tool path generation is a fundamental problem in 5-axis CNC machining, which consists of tool orientation planning and cutter-contact(CC) point planning. The planning strategy highly depends on the type of tool cutters. For ball-end cutters, the tool orientation and CC point location can be planned separately;while for flat end cutters, the two are highly dependent on each other. This paper generates a smooth tool path of workpiece surfaces for flat end mills from two stages: Computing smooth tool orientations on the surface without gouging and collisions and then designing the CC point path. By solving the tool posture optimization problem the authors achieve both the path smoothness and the machining efficiency. Experimental results are provided to show the effectiveness of the method.YUAN Chunming MI Zhenpeng JIA Xiaohong LIN Fengming SHEN Liyong 2021Journal of Systems Science & Complexity2021,34,1:3
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