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MGMT activated by Wnt pathway promotes cisplatin tolerance through inducing slow-cycling cells and nonhomologous end joining in colorectal cancer
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作者 Haowei Zhang Qixin Li +9 位作者 Xiaolong guo Hong Wu Chenhao Hu Gaixia Liu Tianyu Yu Xiake Hu Quanpeng Qiu gang guo Junjun She Yinnan Chen 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2024年第6期863-877,共15页
Chemotherapy resistance plays a pivotal role in the prognosis and therapeutic failure of patients with colorectal cancer(CRC).Cisplatin(DDP)-resistant cells exhibit an inherent ability to evade the toxic chemotherapeu... Chemotherapy resistance plays a pivotal role in the prognosis and therapeutic failure of patients with colorectal cancer(CRC).Cisplatin(DDP)-resistant cells exhibit an inherent ability to evade the toxic chemotherapeutic drug effects which are characterized by the activation of slow-cycle programs and DNA repair.Among the elements that lead to DDP resistance,O^(6)-methylguanine(O^(6)-MG)-DNA-methyltransferase(MGMT),a DNA-repair enzyme,performs a quintessential role.In this study,we clarify the significant involvement of MGMT in conferring DDP resistance in CRC,elucidating the underlying mechanism of the regulatory actions of MGMT.A notable upregulation of MGMT in DDP-resistant cancer cells was found in our study,and MGMT repression amplifies the sensitivity of these cells to DDP treatment in vitro and in vivo.Conversely,in cancer cells,MGMT overexpression abolishes their sensitivity to DDP treatment.Mechanistically,the interaction between MGMT and cyclin dependent kinase 1(CDK1)inducing slow-cycling cells is attainted via the promotion of ubiquitination degradation of CDK1.Meanwhile,to achieve nonhomologous end joining,MGMT interacts with XRCC6 to resist chemotherapy drugs.Our transcriptome data from samples of 88 patients with CRC suggest that MGMT expression is co-related with the Wnt signaling pathway activation,and several Wnt inhibitors can repress drug-resistant cells.In summary,our results point out that MGMT is a potential therapeutic target and predictive marker of chemoresistance in CRC. 展开更多
关键词 Colorectal cancer MGMT Chemotherapy resistance Slow-cycling cells Nonhomologous end joining Wnt pathway
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Enhancing metformin-induced tumor metabolism destruction by glucose oxidase for triple-combination therapy
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作者 Rangrang Fan Linrui Cai +4 位作者 Hao Liu Hongxu Chen Caili Chen gang guo Jianguo Xu 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2024年第3期321-334,共14页
Despite decades of laboratory and clinical trials,breast cancer remains the main cause of cancer-related disease burden in women.Considering the metabolism destruction effect of metformin(Met)and cancer cell starvatio... Despite decades of laboratory and clinical trials,breast cancer remains the main cause of cancer-related disease burden in women.Considering the metabolism destruction effect of metformin(Met)and cancer cell starvation induced by glucose oxidase(GOx),after their efficient delivery to tumor sites,GOx and Met may consume a large amount of glucose and produce sufficient hydrogen peroxide in situ.Herein,a pH-responsive epigallocatechin gallate(EGCG)-conjugated low-molecular-weight chitosan(LC-EGCG,LE)nanoparticle(Met–GOx/Fe@LE NPs)was constructed.The coordination between iron ions(Fe3+)and EGCG in this nanoplatform can enhance the efficacy of chemodynamic therapy via the Fenton reaction.Met–GOx/Fe@LE NPs allow GOx to retain its enzymatic activity while simultaneously improving its stability.Moreover,this pH-responsive nanoplatform presents controllable drug release behavior.An in vivo biodistribution study showed that the intracranial accumulation of GOx delivered by this nanoplatform was 3.6-fold higher than that of the free drug.The in vivo anticancer results indicated that this metabolism destruction/starvation/chemodynamic triple-combination therapy could induce increased apoptosis/death of tumor cells and reduce their proliferation.This triple-combination therapy approach is promising for efficient and targeted cancer treatment. 展开更多
关键词 METFORMIN Glucose oxidase Metabolism disruption Tumor starvation Combination cancer therapy
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Boosting ferroptosis and microtubule inhibition for antitumor therapy via a carrier-free supermolecule nanoreactor 被引量:2
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作者 Min Mu Xiaoyan Liang +8 位作者 Na Zhao Di Chuan Bo Chen Shasha Zhao guoqing Wang Rangrang Fan Bingwen Zou Bo Han gang guo 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2023年第1期99-109,共11页
Traditional microtubule inhibitors fail to significantly enhance+e effect of colorectal cancer;hence,new and efficient strategies are necessary.In+is study,a supramolecular nanoreactor(DOC@TA-Fe^(3+))based on tannic a... Traditional microtubule inhibitors fail to significantly enhance+e effect of colorectal cancer;hence,new and efficient strategies are necessary.In+is study,a supramolecular nanoreactor(DOC@TA-Fe^(3+))based on tannic acid(TA),iron ion(Fe^(3+)),and docetaxel(DOC)wi+microtubule inhibition,reactive oxygen species(ROS)generation,and gluta+ione peroxidase 4(GPX4)inhibition,is prepared for ferroptosis/apoptosis treatment.After internalization by CT26 cells,+e DOC@TA-Fe^(3+)nanoreactor escapes from+e lysosomes to release payloads.+e subsequent Fe^(3+)/Fe^(2+)conversion mediated by TA reducibility can trigger+e Fenton reaction to enhance+e ROS concentration.Additionally,Fe^(3+)can consume gluta+ione to repress+e activity of GPX4 to induce ferroptosis.Meanwhile,+e released DOC controls microtubule dynamics to activate+e apoptosis pa+way.+e superior in vivo antitumor efficacy of DOC@TA-Fe^(3+)nanoreactor in terms of tumor grow+inhibition and improved survival is verified in CT26 tumor-bearing mouse model.+erefore,+e nanoreactor can act as an effective apoptosis and ferroptosis inducer for application in colorectal cancer+erapy. 展开更多
关键词 Carrier-free nanoreactor Ferroptosis MICROTUBULE Colorectal cancer
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Formation and distribution of coal measure source rocks in the Eocene Pinghu Formation in the Pinghu Slope of the Xihu Depression,East China Sea Shelf Basin
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作者 Yongcai Yang Xiaojun Xie +3 位作者 Youchuan Li gang guo Xiaoying Xi Wenjing Ding 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2023年第3期254-269,共16页
The Xihu Depression in the East China Sea Shelf Basin is a large petroliferous sedimentary depression,in which oil and gas reservoirs were mainly discovered in the Pinghu Slope and the central inversion zone.The oil-g... The Xihu Depression in the East China Sea Shelf Basin is a large petroliferous sedimentary depression,in which oil and gas reservoirs were mainly discovered in the Pinghu Slope and the central inversion zone.The oil-gas source correlation in the Xihu Depression was analyzed by hydrocarbon generating thermal simulation data via gold-tube pyrolysis experiments.The results indicated that the oil and gas in the Xihu Depression were mainly derived from coal measure source rocks of the Eocene Pinghu Formation.Therefore,the identification of coal seams is extremely crucial for evaluating coal measure source rocks in the Pinghu Formation in the Xihu Depression.Geochemical and petrological characterization pointed to input of terrigenous organic matter and redox conditions of the depositional environment as factors that govern the ability of the coal measure source rocks in hydrocarbon generation in the Xihu Depression.In this regard,the sedimentary organic facies in the Pinghu Formation were classified into four predominantly terrigenous and one mixed-source subfacies,which all varied in carbon and hydrogen content.The coal measure source rocks in the carbon-and hydrogen-rich tidal flat-lagoon exhibited the highest hydrocarbon generation potential,whereas the mudstone in the neritic facies was the poorest in its hydrocarbon yield.These results suggested that the coal measure source rocks in the Pinghu Formation likely developed in the Hangzhou Slope and the Tiantai Slope,both representing promising sources for oil and gas exploration. 展开更多
关键词 coal measure source rocks natural gas LAGOON sedimentary organic facies terrigenous organic matter
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Polydopamine-coated i-motif DNA/Gold nanoplatforms for synergistic photothermal-chemotherapy
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作者 Bo Chen Lan Mei +6 位作者 Rangrang Fan Di Chuan Yangmei Ren Min Mu Haifeng Chen Bingwen Zou gang guo 《Asian Journal of Pharmaceutical Sciences》 SCIE CAS 2023年第2期49-60,共12页
The combination of photothermal therapywith chemotherapy has gradually developed into promising cancer therapy.Here,a synergistic photothermal-chemotherapy nanoplatform based on polydopamine(PDA)-coated gold nanoparti... The combination of photothermal therapywith chemotherapy has gradually developed into promising cancer therapy.Here,a synergistic photothermal-chemotherapy nanoplatform based on polydopamine(PDA)-coated gold nanoparticles(AuNPs)were facilely achieved via the in situ polymerization of dopamine(DA)on the surface of AuNPs.This nanoplatform exhibited augmented photothermal conversion efficiency and enhanced colloidal stability in comparison with uncoated PDA shell AuNPs.The i-motif DNA nanostructure was assembled on PDA-coated AuNPs,which could be transformed into a C-quadruplex structure under an acidic environment,showing a characteristic pH response.The PDA shell served as a linker between the AuNPs and the i-motif DNA nanostructure.To enhance the specific cellular uptake,the AS1411 aptamer was introduced to the DNA nanostructure employed as a targeting ligand.In addition,Dox-loaded NPs(DAu@PDA-AS141)showed the pH/photothermal-responsive release of Dox.The photothermal effect of DAu@PDA-AS141 elicited excellent photothermal performance and efficient cancer cell inhibition under 808 nm near-infrared(NIR)irradiation.Overall,these results demonstrate that the DAu@PDA-AS141 nanoplatform shows great potential in synergistic photothermal-chemotherapy. 展开更多
关键词 Gold nanoparticles POLYDOPAMINE I-MOTIF AS1411 aptamer Photothermal-chemotherapy
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Simulation study on the influence of longitudinal dynamic force on extreme-long heavy-haul trains
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作者 Chongyi Chang gang guo +1 位作者 Wen He Zhendong Liu 《Railway Sciences》 2023年第4期495-513,共19页
Purpose–The objective of this study is to investigate the impact of longitudinal forces on extreme-long heavy-haul trains,providing new insights and methods for their design and operation,thereby enhancing safety,ope... Purpose–The objective of this study is to investigate the impact of longitudinal forces on extreme-long heavy-haul trains,providing new insights and methods for their design and operation,thereby enhancing safety,operational efficiency and track system design.Design/methodology/approach–A longitudinal dynamics simulation model of the super long heavy haul train was established and verified by the braking test data of 30,000 t heavy-haul combination train on the long and steep down grade of Daqing Line.The simulation model was used to analyze the influence of factors on the longitudinal force of super long heavy haul train.Findings–Under normal conditions,the formation length of extreme-long heavy-haul combined train has a small effect on the maximum longitudinal coupler force under full service braking and emergency braking on the straight line.The slope difference of the long and steep down grade has a great impact on the maximum longitudinal coupler force of the extreme-long heavy-haul trains.Under the condition that the longitudinal force does not exceed the safety limit of 2,250 kN under full service braking at the speed of 60 km/h the maximum allowable slope difference of long and steep down grade for 40,000 t super long heavy-haul combined trains is 13‰,and that of 100,000 t is only 5‰.Originality/value–The results will provide important theoretical basis and practical guidance for further improving the transportation efficiency and safety of extreme-long heavy-haul trains. 展开更多
关键词 Heavy-haul combined train Longitudinal dynamics Train length Locomotive synchronization control Slope difference
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Diffusion kurtosis imaging of microstructural changes in brain tissue affected by acute ischemic stroke in different locations 被引量:27
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作者 Liu-Hong Zhu Zhong-Ping Zhang +2 位作者 Fu-Nan Wang Qi-Hua Cheng gang guo 《Neural Regeneration Research》 SCIE CAS CSCD 2019年第2期272-279,共8页
The location of an acute ischemic stroke is associated with its prognosis. The widely used Gaussian model-based parameter, apparent diffusion coefficient(ADC), cannot reveal microstructural changes in different locati... The location of an acute ischemic stroke is associated with its prognosis. The widely used Gaussian model-based parameter, apparent diffusion coefficient(ADC), cannot reveal microstructural changes in different locations or the degree of infarction. This prospective observational study was reviewed and approved by the Institutional Review Board of Xiamen Second Hospital, China(approval No. 2014002).Diffusion kurtosis imaging(DKI) was used to detect 199 lesions in 156 patients with acute ischemic stroke(61 males and 95 females), mean age 63.15 ± 12.34 years. A total of 199 lesions were located in the periventricular white matter(n = 52), corpus callosum(n = 14), cerebellum(n = 29), basal ganglia and thalamus(n = 21), brainstem(n = 21) and gray-white matter junctions(n = 62). Percentage changes of apparent diffusion coefficient(ΔADC) and DKI-derived indices(fractional anisotropy [ΔFA], mean diffusivity [ΔMD], axial diffusivity [ΔD_a], radial diffusivity ΔDr, mean kurtosis [ΔMK], axial kurtosis [ΔK_a], and radial kurtosis [ΔK_r]) of each lesion were computed relative to the normal contralateral region. The results showed that(1) there was no significant difference in ΔADC, ΔMD, ΔD_a or ΔD_r among almost all locations.(2) There was significant difference in ΔMK among almost all locations(except basal ganglia and thalamus vs. brain stem; basal ganglia and thalamus vs. gray-white matter junctions; and brainstem vs. gray-white matter junctions.(3) The degree of change in diffusional kurtosis in descending order was as follows: corpus callosum > periventricular white matter > brainstem > gray-white matter junctions > basal ganglia and thalamus > cerebellum. In conclusion, DKI could reveal the differences in microstructure changes among various locations affected by acute ischemic stroke, and performed better than diffusivity among all groups. 展开更多
关键词 nerve REGENERATION APPARENT DIFFUSION coefficient DIFFUSION weighted IMAGING DIFFUSION KURTOSIS IMAGING acute ischemic stroke mean KURTOSIS microstructure changes white matter 1.5 TESLA magnetic resonance system neural REGENERATION
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Variance components and correlations of female fertility traits in Chinese Holstein population 被引量:7
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作者 Aoxing Liu Mogens Sandø Lund +4 位作者 Yachun Wang gang guo ganghui Dong Per Madsen guosheng Su 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2017年第4期833-841,共9页
Background: The objective of the present study was to estimate(co)variance components of female fertility traits in Chinese Holsteins, considering fertility traits in different parities as different traits. Data on 88... Background: The objective of the present study was to estimate(co)variance components of female fertility traits in Chinese Holsteins, considering fertility traits in different parities as different traits. Data on 88,647 females with 215,632 records(parities) were collected during 2000 to 2014 from 32 herds in the Sanyuan Lvhe Dairy Cattle Center, Beijing, China. The analyzed female fertility traits included interval from calving to first insemination, interval from first to last insemination, days open, conception rate at first insemination, number of inseminations per conception and non-return rates within 56 days after first insemination.Results: The descriptive statistics showed that the average fertility of heifers was superior to that of cows. Moreover,the genetic correlations between the performances of a trait in heifers and in cows were all moderate to high but far from one, which suggested that the performances of a trait in heifers and cows should be considered as different but genetically correlated traits in genetic evaluations. On the other hand, genetic correlations between performances of a trait in different parities of cows were greater than 0.87, with only a few exceptions, but variances were not homogeneous across parities for some traits. The estimated heritabilities of female fertility traits were low; all were below 0.049(except for interval from calving to first insemination). Additionally, the heritabilities of the heifer interval traits were lower than those of the corresponding cow interval traits. Moreover, the heritabilities of the interval traits were higher than those of the threshold traits when measuring similar fertility functions. In general, estimated genetic correlations between traits were highly consistent with the biological categories of the female fertility traits.Conclusions: Interval from calving to first insemination, interval from first to last insemination and non-return rates within 56 days after first insemination are recommended to be included in the selection index of the Chinese Holstein population. The parameters estimated in the present study will facilitate the development of a genetic evaluation system for female fertility traits to improve the reproduction efficiency of Chinese Holsteins. 展开更多
关键词 Chinese HOLSTEINS FEMALE FERTILITY Genetic correlation HERITABILITY
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Dust removal efficiency of high pressure atomization in underground coal mine 被引量:9
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作者 Pengfei Wang Xuanhao Tan +2 位作者 Weimin Cheng gang guo Ronghua Liu 《International Journal of Mining Science and Technology》 EI CSCD 2018年第4期677-682,共6页
To master theoretical calculation for dust removal efficiency of high pressure atomization in an underground coal mine, the corresponding atomization characteristics and dust removal efficiency were both comprehensive... To master theoretical calculation for dust removal efficiency of high pressure atomization in an underground coal mine, the corresponding atomization characteristics and dust removal efficiency were both comprehensively studied in theory by virtue of related theories of hydromechanics and aerosol.According to actual measurements of flow coefficients and atomization angles of X-type swirl nozzle,computational formula was derived for atomized particle sizes of such a nozzle in conjunction with relevant empirical equation. Moreover, a mathematical model for applying high pressure atomization to dust removal in underground coal mine was also established to deduce theoretical computation formula of fractional efficiency. Then, Matlab was adopted to portray the relation curve between fractional efficiency and influence factors. In addition, a theoretical formula was also set up for removal efficiency of respirable dust and total coal dust based on dust size and frequency distribution equations. In the end,impacts of dust characteristic parameters on various dust removal efficiencies were analyzed. 展开更多
关键词 Underground coal mine High pressure atomization Atomization characteristics Dust removal efficiency
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Single-event-effect propagation investigation on nanoscale system on chip by applying heavy-ion microbeam and event tree analysis 被引量:5
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作者 Wei-Tao Yang Xue-Cheng Du +7 位作者 Yong-Hong Li Chao-Hui He gang guo Shu-Ting Shi Li Cai Sarah Azimi Corrado De Sio Luca Sterpone 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2021年第10期156-165,共10页
The propagation of single-event effects(SEEs)on a Xilinx Zynq-7000 system on chip(SoC)was inves-tigated using heavy-ion microbeam radiation.The irradia-tion results reveal several functional blocks’sensitivity locati... The propagation of single-event effects(SEEs)on a Xilinx Zynq-7000 system on chip(SoC)was inves-tigated using heavy-ion microbeam radiation.The irradia-tion results reveal several functional blocks’sensitivity locations and cross sections,for instance,the arithmetic logic unit,register,D-cache,and peripheral,while irradi-ating the on-chip memory(OCM)region.Moreover,event tree analysis was executed based on the obtained microbeam irradiation results.This study quantitatively assesses the probabilities of SEE propagation from the OCM to other blocks in the SoC. 展开更多
关键词 System on chip Single-event effect Heavy-ion microbeam Event tree analysis
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A Macaca mulatta model of fulminant hepatic failure 被引量:4
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作者 Ping Zhou Jie Xia +6 位作者 gang guo Zi-Xing Huang Qiang Lu Li Li Hong-Xia Li Yu-Jun Shi Hong Bu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第5期435-444,共10页
AIM:To establish an appropriate primate model of fulminant hepatic failure (FHF).METHODS:We have,for the first time,established a large animal model of FHF in Macaca mulatta by intraperitoneal infusion of amatoxin and... AIM:To establish an appropriate primate model of fulminant hepatic failure (FHF).METHODS:We have,for the first time,established a large animal model of FHF in Macaca mulatta by intraperitoneal infusion of amatoxin and endotoxin.Clinical features,biochemical indexes,histopathology and iconography were examined to dynamically investigate the progress and outcome of the animal model.RESULTS:Our results showed that the enzymes and serum bilirubin were markedly increased and the enzyme-bilirubin segregation emerged 36 h after toxin administration.Coagulation activity was significantly decreased.Gradually deteriorated parenchymal abnormality was detected by magnetic resonance imaging (MRI) and ultrasonography at 48 h.The liver biopsy showed marked hepatocyte steatosis and massive parenchymal necrosis at 36 h and 49 h,respectively.The autopsy showed typical yellow atrophy of the liver.Hepatic encephalopathy of the models was also confirmed by hepatic coma,MRI and pathological changes of cerebral edema.The lethal effects of the extrahepatic organ dysfunction were ruled out by their biochemical indices,imaging and histopathology.CONCLUSION:We have established an appropriate large primate model of FHF,which is closely similar to clinic cases,and can be used for investigation of the mechanism of FHF and for evaluation of potential medical therapies. 展开更多
关键词 Fulminant hepatic failure Macaca mulatta BIOCHEMISTRY IMAGING PATHOLOGY
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Single-event effects induced by medium-energy protons in 28 nm system-on-chip 被引量:4
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作者 Wei-Tao Yang Qian Yin +6 位作者 Yang Li gang guo Yong-Hong Li Chao-Hui He Yan-Wen Zhang Fu-Qiang Zhang Jin-Hua Han 《Nuclear Science and Techniques》 SCIE CAS CSCD 2019年第10期55-62,共8页
Single-event effects(SEEs)induced by mediumenergy protons in a 28 nm system-on-chip(SoC)were investigated at the China Institute of Atomic Energy.An on-chip memory block was irradiated with 90 MeV and 70 MeV protons,r... Single-event effects(SEEs)induced by mediumenergy protons in a 28 nm system-on-chip(SoC)were investigated at the China Institute of Atomic Energy.An on-chip memory block was irradiated with 90 MeV and 70 MeV protons,respectively.Single-bit upset and multicell upset events were observed,and an uppermost number of nine upset cells were discovered in the 90 MeV proton irradiation test.The results indicate that the SEE sensitivities of the 28 nm SoC to the 90 MeV and 70 MeV protons were similar.Cosmic Ray Effects on Micro-Electronics Monte Carlo simulations were analyzed,and it demonstrates that protons can induce effects in a 28 nm SoC if their energies are greater than 1.4 MeV and that the lowest corresponding linear energy transfer was 0.142 MeV cm^2 mg^-1.The similarities and discrepancies of the SEEs induced by the 90 MeV and 70 MeV protons were analyzed. 展开更多
关键词 Single-event effect PROTON SYSTEM-ON-CHIP
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Experimental study of temperature dependence of single-event upset in SRAMs 被引量:2
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作者 Li Cai gang guo +7 位作者 Jian-Cheng Liu Hui Fan Shu-Ting Shi Hui Wang Gui-Liang Wang Dong-Jun Shen Ning Hui An-Lin He 《Nuclear Science and Techniques》 SCIE CAS CSCD 2016年第1期93-97,共5页
We report on the temperature dependence of single-event upsets in the 215–353 K range in a 4M commercial SRAM manufactured in a 0.15-lm CMOS process,utilizing thin film transistors. The experimental results show that... We report on the temperature dependence of single-event upsets in the 215–353 K range in a 4M commercial SRAM manufactured in a 0.15-lm CMOS process,utilizing thin film transistors. The experimental results show that temperature influences the SEU cross section on the rising portion of the cross-sectional curve(such as the chlorine ion incident). SEU cross section increases 257 %when the temperature increases from 215 to 353 K. One of the possible reasons for this is that it is due to the variation in upset voltage induced by changing temperature. 展开更多
关键词 温度依赖性 单粒子翻转 SRAM 实验 截面曲线 薄膜晶体管 工艺制造 CMOS
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Investigation of single event effect in 28-nm system-on-chip with multi patterns 被引量:2
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作者 Wei-Tao Yang Yong-Hong Li +8 位作者 Ya-Xin guo Hao-Yu Zhao Yang Li Pei Li Chao-Hui He gang guo Jie Liu Sheng-Sheng Yang Heng An 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第10期573-577,共5页
Single event effects (SEEs) in a 28-nm system-on-chip (SoC) were assessed using heavy ion irradiations, and susceptibilities in different processor configurations with data accessing patterns were investigated. The pa... Single event effects (SEEs) in a 28-nm system-on-chip (SoC) were assessed using heavy ion irradiations, and susceptibilities in different processor configurations with data accessing patterns were investigated. The patterns included the sole processor (SP) and asymmetric multiprocessing (AMP) patterns with static and dynamic data accessing. Single event upset (SEU) cross sections in static accessing can be more than twice as high as those of the dynamic accessing, and processor configuration pattern is not a critical factor for the SEU cross sections. Cross section interval of upset events was evaluated and the soft error rates in aerospace environment were predicted for the SoC. The tests also indicated that ultra-high linear energy transfer (LET) particle can cause exception currents in the 28-nm SoC, and some even are lower than the normal case. 展开更多
关键词 SYSTEM-ON-CHIP heavy ion single event effect
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Angular dependence of proton-induced single event transient in silicon-germanium heterojunction bipolar transistors 被引量:1
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作者 Jianan Wei Yang Li +5 位作者 Wenlong Liao Fang Liu Yonghong Li Jiancheng Liu Chaohui He gang guo 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第8期536-541,共6页
We investigate the angular dependence of proton-induced single event transient(SET) in silicon-germanium heterojunction bipolar transistors. Experimental results show that the overall SET cross section is almost indep... We investigate the angular dependence of proton-induced single event transient(SET) in silicon-germanium heterojunction bipolar transistors. Experimental results show that the overall SET cross section is almost independent of proton incident angle. However, the proportion of SET events with long duration and high integral charge collection grows significantly with the increasing angle. Monte Carlo simulations demonstrate that the integral cross section of proton incident events with high ionizing energy deposition in the sensitive volume tends to be higher at larger incident angles, which is associated with the angular distribution of proton-induced secondary particles and the geometry of sensitive volume. 展开更多
关键词 heterojunction bipolar transistor proton irradiation single event transient angular effect
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Heavy Ion and Laser Microbeam Induced Current Transients in SiGe Heterojunction Bipolar Transistor 被引量:1
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作者 Pei Li Chao-Hui He +4 位作者 gang guo Hong-Xia guo Feng-Qi Zhang Jin-Xin Zhang Shu-Ting Shi 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第10期100-103,共4页
Silicon-germanium (SiGe) hereto-junction bipolar transistor current transients induced by pulse laser and heavy iron are measured using a real-time digital oscilloscope. These transients induced by pulse laser and h... Silicon-germanium (SiGe) hereto-junction bipolar transistor current transients induced by pulse laser and heavy iron are measured using a real-time digital oscilloscope. These transients induced by pulse laser and heavy iron exhibit the same waveform and charge collection time except for the amplitude of peak current. Different laser energies and voltage biases under heavy ion irradiation also have impact on current transient, whereas the waveform remains unchanged. The position-correlated current transients suggest that the nature of the current transient is controlled by the behavior of the C/S junction. 展开更多
关键词 HBT Heavy Ion and Laser Microbeam Induced Current Transients in SiGe Heterojunction Bipolar Transistor
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大数据环境下加强新时代治安要素管控的实践与探索--以建湖县公安局为例 被引量:1
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作者 郭刚 嵇晓昉 《大数据时代》 2020年第5期20-25,共6页
随着智慧警务的深入发展,"互联网+"、人脸识别、云计算、物联网等新技术的广泛应用给新时代治安要素管控带来了一次颠覆性革命。本文以建湖县公安局为例,研究现代公安局如何主动拥抱大数据,抓住智慧警务建设的契机,依托现代... 随着智慧警务的深入发展,"互联网+"、人脸识别、云计算、物联网等新技术的广泛应用给新时代治安要素管控带来了一次颠覆性革命。本文以建湖县公安局为例,研究现代公安局如何主动拥抱大数据,抓住智慧警务建设的契机,依托现代科技手段,对与公共安全紧密相关的各个要素进行管理,最终实现了全地域与多种类、全时空与多角度管控,推动治安要素管控提档升级。 展开更多
关键词 大数据 治安要素 管控 对策
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Weighted single-step GWAS and RNA sequencing reveals key candidate genes associated with physiological indicators of heat stress in Holstein cattle
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作者 Hanpeng Luo Lirong Hu +9 位作者 Luiz F.Brito Jinhuan Dou Abdul Sammad Yao Chang Longgang Ma gang guo Lin Liu Liwei Zhai Qing Xu Yachun Wang 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2022年第6期1714-1726,共13页
Background: The study of molecular processes regulating heat stress response in dairy cattle is paramount for developing mitigation strategies to improve heat tolerance and animal welfare. Therefore, we aimed to ident... Background: The study of molecular processes regulating heat stress response in dairy cattle is paramount for developing mitigation strategies to improve heat tolerance and animal welfare. Therefore, we aimed to identify quantitative trait loci(QTL) regions associated with three physiological indicators of heat stress response in Holstein cattle, including rectal temperature(RT), respiration rate score(RS), and drooling score(DS). We estimated genetic parameters for all three traits. Subsequently, a weighted single-step genome-wide association study(WssGWAS) was performed based on 3200 genotypes, 151,486 phenotypic records, and 38,101 animals in the pedigree file. The candidate genes located within the identified QTL regions were further investigated through RNA sequencing(RNA-seq) analyses of blood samples for four cows collected in April(non-heat stress group) and four cows collected in July(heat stress group).Results: The heritability estimates for RT, RS, and DS were 0.06, 0.04, and 0.03, respectively. Fourteen, 19, and 20 genomic regions explained 2.94%, 3.74%, and 4.01% of the total additive genetic variance of RT, RS, and DS, respectively. Most of these genomic regions are located in the Bos taurus autosome(BTA) BTA3, BTA6, BTA8, BTA12, BTA14, BTA21, and BTA24. No genomic regions overlapped between the three indicators of heat stress, indicating the polygenic nature of heat tolerance and the complementary mechanisms involved in heat stress response. For the RNA-seq analyses, 2627 genes were significantly upregulated and 369 downregulated in the heat stress group in comparison to the control group. When integrating the WssGWAS, RNA-seq results, and existing literature, the key candidate genes associated with physiological indicators of heat stress in Holstein cattle are: PMAIP1, SBK1, TMEM33, GATB, CHORDC1, RTN4IP1, and BTBD7.Conclusions: Physiological indicators of heat stress are heritable and can be improved through direct selection. Fifty-three QTL regions associated with heat stress indicators confirm the polygenic nature and complex genetic determinism of heat tolerance in dairy cattle. The identified candidate genes will contribute for optimizing genomic evaluation models by assigning higher weights to genetic markers located in these regions as well as to the design of SNP panels containing polymorphisms located within these candidate genes. 展开更多
关键词 Climatic resilience Dairy cattle QTL mapping RNA sequencing WssGWAS
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Efficacy of early lifestyle intervention on metabolic syndrome
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作者 Gui-Lan Zhang gang guo Ye-Ping Cheng 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2010年第1期14-20,共7页
Objective Intensive lifestyle intervention significantly reduces the progression to diabetes in high-risk individuals. This study aimed to investigate the efficacy of early lifestyle intervention on high-risk groups o... Objective Intensive lifestyle intervention significantly reduces the progression to diabetes in high-risk individuals. This study aimed to investigate the efficacy of early lifestyle intervention on high-risk groups of metabolic syndrome. Methods In a two-arm randomized controlled 1-year trial, we compared the effectiveness of a general recommendation-based program of lifestyle intervention carded out by wained professionals versus standard unstructured information given by physicians at reducing the prevalence of multiple metabolic and inflammatory abnormalities in 306 adults aged 45-64 years in Xiaogan city, China. Results At baseline, clinical/ anthropometric/laboratory and lifestyle characteristics of the intervention (n= 153 ) and control (n= 153) groups were not significantly different. The former significantly reduced total/saturated fat intake and increased polyunsaturated fat/fiber intake and exercise level compared to the controls. Weight, waist circumference, high-sensitivity C-reactive protein, and most of the metabolic syndrome components decreased in the intervention group and increased in the controls after 12 months. Lifestyle intervention significantly reduced metabolic syndrome (OR=0.28; 95% CI 0.18-0.44), with a 31% (95% C121-41) absolute risk reduction, corresponding to 3.2 (95% CI, 2-5) patients needing to be treated to prevent 1 case after 12 months. The intervention significantly reduced the prevalence of central obesity (OR=0.33; 95% CI, 0.20-0.56), and hypertriglyceridemia (OR=0.48; 95% CI, 0.31-0.75) and the incidence of diabetes (OR=0.23; 95% CI, 0.06-0.85). Conclusions A lifestyle intervention based on general recommendations was effective in reducing multiple metabolic/inflammatory abnormalities. The usual care by clinical physicians was ineffective at modifying progressive metabolic deterioration in high-risk individuals (J Geriatr Cardio12010; 7:10-16). 展开更多
关键词 lifestyle intervention metabolic syndrome DIABETES DYSLIPIDEMIA
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Review and Perspectives on Human Emotion for Connected Automated Vehicles 被引量:1
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作者 Wenbo Li guofa Li +6 位作者 Ruichen Tan Cong Wang Zemin Sun Ying Li gang guo Dongpu Cao Keqiang Li 《Automotive Innovation》 EI CSCD 2024年第1期4-44,共41页
The progression toward automated driving and the latest advancement in vehicular networking have led to novel and natural human-vehicle-road systems,in which affective human-vehicle interaction is a crucial factor aff... The progression toward automated driving and the latest advancement in vehicular networking have led to novel and natural human-vehicle-road systems,in which affective human-vehicle interaction is a crucial factor affecting the acceptance,safety,comfort,and traffic efficiency of connected and automated vehicles(CAVs).This development has inspired increasing inter-est in how to develop affective interaction framework for intelligent cockpit in CAVs.To enable affective human-vehicle interactions in CAVs,knowledge from multiple research areas is needed,including automotive engineering,transportation engineering,human-machine interaction,computer science,communication,as well as industrial engineering.However,there is currently no systematic survey considering the close relationship between human-vehicle-road and human emotion in the human-vehicle-road coupling process in the CAV context.To facilitate progress in this area,this paper provides a comprehensive literature survey on emotion-related studies from multi-aspects for better design of affective interaction in intelligent cockpit for CAVs.This paper discusses the multimodal expression of human emotions,investigates the human emotion experiment in driving,and particularly emphasizes previous knowledge on human emotion detection,regulation,as well as their applications in CAVs.The promising research perspectives are outlined for researchers and engineers from different research areas to develop CAVs with better acceptance,safety,comfort,and enjoyment for users. 展开更多
关键词 Intelligent vehicles Intelligent cockpit Human-machine interaction Emotion recognition Emotion regulation
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