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554篇 您的检索式:作者名="Shiyu"
    题名 作者 年代 出处 被引量
1Cooperative Guidance for Multimissile Salvo Attack显示文摘多重导弹的合作指导问题在这篇文章被考虑。在协作算法和本地指导法律一起被联合的地方,一个合作指导计划被建议。这个计划实际上建立层次合作指导体系结构,它可以提供一个一般答案给 multimissile 合作社指导问题。在要求导弹同时击中目标的保留攻击的情况中,集中、分布式的协作算法基于 impact-time-control 指导(ITCG ) 被导出法律。数字模拟被执行表明建议途径的有效性。Zhao Shiyu Zhou Rui 2008Chinese Journal of Aeronautics2008,21,6:76
2Clean Coal Technologies in China: Current Status and Future Perspectives显示文摘Shiyan Chang Jiankun Zhuo Shuo Meng Shiyue Qin Qiang Yao 2016Engineering2016,2,4:43
3Design of Time-constrained Guidance Laws via Virtual Leader Approach显示文摘Guidance problems with flight time constraints are considered in this article.A new virtual leader scheme is used for design of guidance laws with time constraints.The core idea of this scheme is to adopt a virtual leader for real missiles to convert a guidance problem with time constraints to a nonlinear tracking problem,thereby making it possible to settle the problem with a variety of control methods.A novel time-constrained guidance(TCG) law,which can control the flight time of missiles to a prescribed time,is designed by using the virtual leader scheme and stability method.The TCG law is a combination of the well-known proportional navigation guidance(PNG) law and the feedback of flight time error.What's more,this law is free of singularities and hence yields better performances in comparison with optimal guidance laws with time constraints.Nonlinear simulations demonstrate the effectiveness of the proposed law.Zhao Shiyu Zhou Rui Wei Chen Ding Quanxin 2010Chinese Journal of Aeronautics2010,23,1:36
4Scientific design and preliminary results of three-dimensional variational data assimilation system of GRAPES显示文摘The scientific design and preliminary results of the data assimilation component of the Global-Regional Prediction and Assimilation System (GRAPES) recently developed in China Meteorological Administration (CMA) are presented in this paper. This is a three-dimensional variational (3DVar) assimilation system set up on global and regional grid meshes favorable for direct assimilation of the space-based remote sensing data and matching the frame work of the prediction model GRAPES. The state variables are assumed to decompose balanced and unbalanced components. By introducing a simple transformation from the state variables to the control variables with a recursive or spectral filter, the convergence rate of iteration for minimization of the cost function in 3DVar is greatly accelerated. The definition of dynamical balance depends on the characteristic scale of the circulation considered. The ratio of the balanced to the unbalanced parts is controlled by the prescribed statistics of background errors. Idealized trials produce the same results as the analytic solution. The results of real data case studies show the capability of the system to improve analysis compared to the traditional schemes. Finally, further development of the system is discussed.XUE JiShan ZHUANG ShiYu ZHU GuoFu ZHANG Hua LIU ZhiQuan LIU Yan ZHUANG ZhaoRong 2008Chinese Science Bulletin2008,53,22:33
5Nanomaterials and bone regeneration显示文摘The worldwide incidence of bone disorders and conditions has been increasing. Bone is a nanomaterials composed of organic(mainly collagen) and inorganic(mainly nano-hydroxyapatite) components, with a hierarchical structure ranging from nanoscale to macroscale. In consideration of the serious limitation in traditional therapies, nanomaterials provide some new strategy in bone regeneration. Nanostructured scaffolds provide a closer structural support approximation to native bone architecture for the cells and regulate cell proliferation, differentiation, and migration, which results in the formation of functional tissues. In this article,we focused on reviewing the classification and design of nanostructured materials and nanocarrier materials for bone regeneration, their cell interaction properties, and their application in bone tissue engineering and regeneration. Furthermore, some new challenges about the future research on the application of nanomaterials for bone regeneration are described in the conclusion and perspectives part.Tao Gong Jing Xie Jinfeng Liao Tao Zhang Shiyu Lin Yunfeng Lin 2015Bone Research2015,3,3:23
6Tongue coating microbiome as a potential biomarker for gastritis including precancerous cascade显示文摘The development of gastritis is associated with an increased risk of gastric cancer. Current invasive gastritis diagnostic methods are not suitable for monitoring progressIn this work based on 78 gastritis patients and 50 healthy individuals, we observed that the variation of tongue-coating microbiota was associated with the occurrenee and development of gastritis. Twenty-one microbial species were identified for differentiating tongue-coating microbiomes of gastritis and healthy individuals. Pathways such as microbial metabolism in diverse environments, biosynthesis of antibiotics and bacterial chemotaxis were up-regulated in gastritis patients. The abundance of Campylobacter concisus was found associated with the gastric precancerous cascade. Furthermore, Campylobacter concisus could be detected in tongue coating and gastric fluid in a validation cohort containing 38 gastritis patients. These observations provided biological evidence of tongue diagnosis in traditional Chinese medicine, and indicated that tongue-coating microbiome could be a potential non-invasive biomarker, which might be suitable for long-term monitoring of gastritis.Jiaxing Cui Hongfei Cui Mingran Yang Shiyu Du Junfeng Li Yingxue Li Liyang Liu Xuegong Zhang Shao Li 2019Protein & Cell2019,10,7:21
7Toxicity of cadmium and its competition with mineral nutrients for uptake by plants:A review显示文摘Cadmium(Cd)is a toxic heavy metal occurring in the environment naturally and is also generated through various anthropogenic sources and acts as a pollutant.Human health is affected by Cd pollution in farmland soils because food is the main source of Cd intake in the non-smoking population.For crops,Cd toxicity may result from a disturbance in uptake and translocation of mineral nutrients and disturbance in plant metabolism,inhibiting plant growth and development.However,plants have Cd tolerance mechanisms,including restricted Cd uptake,decreased Cd root-to-shoot translocation,enhanced antioxidant enzyme activities,and increased production of phytochelatins.Furthermore,optimal supply of mineral nutrients is one of the strategies to alleviate the damaging effects of Cd on plants and to avoid its entry into the food chain.The emerging molecular knowledge contributes to understanding Cd uptake,translocation,and remobilization in plants.In this review,Cd toxicity and tolerance mechanisms,agricultural practices to minimize Cd accumulation,Cd competition with essential elements(calcium,copper,iron,zinc,and manganese),and genes associated with Cd uptake are discussed in detail,especially regarding how these mineral nutrients and genes play a role in decreasing Cd uptake and accumulation in crop plants.Shiyu QIN Hongen LIU Zhaojun NIE Zed RENGEL Wei GAO Chang LI Peng ZHAO 2020Pedosphere2020,30,2:20
8Celastrus orbiculatus extract induces mitochondrial-mediated apoptosis in human hepatocellular carcinoma cells显示文摘OBJECTIVE:To investigate the apoptotic effects and underlying molecular mechanisms of Celastrus orbiculatus(C.orbiculatus) extract in human hepatocellular carcinoma cells.METHODS:Human hepatocellular carcinoma cells(HCCLM6) were treated with C.orbiculatus extract(COE) at different nontoxic concentrations(10,20,40,80,and 160 μg/mL).The effect of COE on HC-CLM6 viability was examined using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide(MTT) assays.Cellular apoptosis following COE treatment was assessed by flow cytometry and western blot analysis.RESULTS:COE significantly inhibited cell viability and induced apoptosis of HCCLM6 cells in a dose-dependent manner.Apoptosis was accompanied by increased Bax expression and decreased Bcl-2 expression.In addition,COE treatment led to the release of cytochrome c,activation of caspase-3,and cleavage of poly(ADP-ribose) polymerase(PARP).Furthermore,activation of extracellular signal-regulated kinase(ERK),p38 kinase,and c-Jun N-terminal kinase(JNK) phosphorylation,and down-regulation of Akt phosphorylation was observed.CONCLUSION:COE induces mitochondrial-mediated,caspase-dependent apoptosis in HCCLM6 cells,which might be attributed to the activation of mitogen-activated protein kinase(MAPK) and inhibition of Akt signaling pathways.These data suggest that COE may be a potential treatment for human hepatocellular carcinoma.Hua Zhang Yayun Qian Yanqing Liu Guoqing Li Pingfang Cui Yaodong Zhu Hui Ma Xue Ji Shiyu Guo Hisamits Tadashi 2012Journal of Traditional Chinese Medicine2012,32,4:18
9Stem cell-based bone and dental regeneration: a view of microenvironmental modulation显示文摘In modern medicine,bone and dental loss and defects are common and widespread morbidities,for which regenerative therapy has shown great promise.Mesenchymal stem cells,obtained from various sources and playing an essential role in organ development and postnatal repair,have exhibited enormous potential for regenerating bone and dental tissue.Currently,mesenchymal stem cells (MSCs)-based bone and dental regeneration mainly includes two strategies: the rescue or mobilization of endogenous MSCs and the application of exogenous MSCs in cytotherapy or tissue engineering.Nevertheless,the efficacy of MSCbased regeneration is not always fulfilled,especially in diseased microenvironments.Specifically,the diseased microenvironment not only impairs the regenerative potential of resident MSCs but also controls the therapeutic efficacy of exogenous MSCs,both as donors and recipients.Accordingly,approaches targeting a diseased microenvironment have been established,including improving the diseased niche to restore endogenous MSCs,enhancing MSC resistance to a diseased microenvironment and renormalizing the microenvironment to guarantee MSC-mediated therapies.Moreover,the application of extracellular vesicles (EVs) as cell-free therapy has emerged as a promising therapeutic strategy.In this review,we summarize current knowledge regarding the tactics of MSC-based bone and dental regeneration and the decisive role of the microenvironment,emphasizing the therapeutic potential of microenvironment-targeting strategies in bone and dental regenerative medicine.Chenxi Zheng Ji Chen Shiyu Liu Yan Jin 2019International Journal of Oral Science2019,11,3:18
10Circulating apoptotic bodies maintain mesenchymal stem cell homeostasis and ameliorate osteopenia via transferring multiple cellular factors显示文摘Dawei Liu Xiaoxing Kou Chider Chen Shiyu Liu Yao Liu Wenjing Yu Tingting Yu Ruili Yang Runci Wang Yanheng Zhou Songtao Shi 2018Cell Research2018,28,9:17
112D MOF Nanoflake-Assembled Spherical Microstructures for Enhanced Supercapacitor and Electrocatalysis Performances显示文摘Metal–organic frameworks(MOFs) are of great interest as potential electrochemically active materials.However, few studies have been conducted into understanding whether control of the shape and components of MOFs can optimize their electrochemical performances due to the rational realization of their shapes. Component control of MOFs remains a significant challenge. Herein, we demonstrate a solvothermal method to realize nanostructure engineering of 2D nanoflake MOFs. The hollow structures withNi/Co-and Ni-MOF(denoted as Ni/Co-MOF nanoflakes and Ni-MOF nanoflakes) were assembled for their electrochemical performance optimizations in supercapacitors and in the oxygen reduction reaction(ORR). As a result, the Ni/CoMOF nanoflakes exhibited remarkably enhanced performance with a specific capacitance of 530.4 F g^(-1)at 0.5 A g^(-1)in1 M LiO H aqueous solution, much higher than that of NiMOF(306.8 F g^(-1)) and ZIF-67(168.3 F g^(-1)), a good rate capability, and a robust cycling performance with no capacity fading after 2000 cycles. Ni/Co-MOF nanoflakes also showed improved electrocatalytic performance for the ORR compared to Ni-MOF and ZIF-67. The present work highlights the significant role of tuning 2D nanoflake ensembles of Ni/Co-MOF in accelerating electron and charge transportation for optimizing energy storage and conversion devices.Huicong Xia Jianan Zhang Zhao Yang Shiyu Guo Shihui Guo Qun Xu 2017Nano-Micro Letters2017,9,4:14
12Advancing application of mesenchymal stem cell-based bone tissue regeneration显示文摘Reconstruction of bone defects,especially the critical-sized defects,with mechanical integrity to the skeleton is important for a patient's rehabilitation,however,it still remains challenge.Utilizing biomaterials of human origin bone tissue for therapeutic purposes has provided a facilitated approach that closely mimics the critical aspects of natural bone tissue with regard to its properties.However,not only efficacious and safe but also costeffective and convenient are important for regenerative biomaterials to achieve clinical translation and commercial success.Advances in our understanding of regenerative biomaterials and their roles in new bone formation potentially opened a new frontier in the fast-growing field of regenerative medicine.Taking inspiration from the role and multicomponent construction of native extracellular matrix(ECM)for cell accommodation,the ECM-mimicking biomaterials and the naturally decellularized ECM scaffolds were used to create new tissues for bone restoration.On the other hand,with the going deep in understanding of mesenchymal stem cells(MSCs),they have shown great promise to jumpstart and facilitate bone healing even in diseased microenvironments with pharmacology-based endogenous MSCs rescue/mobilization,systemic/local infusion of MSCs for cytotherapy,biomaterials-based approaches,cell-sheets/-aggregates technology and usage of subcellular vesicles of MSCs to achieve scaffolds-free or cell-free delivery system,all of them have been shown can improve MSCsmediated regeneration in preclinical studies and several clinical trials.Here,following an overview discussed autogenous/allogenic and ECM-based bone biomaterials for reconstructive surgery and applications of MSCsmediated bone healing and tissue engineering to further offer principles and effective strategies to optimize MSCs-based bone regeneration.Fengqing Shang Yang Yu Shiyu Liu Leiguo Ming Yongjie Zhang Zhifei Zhou Jiayu Zhao Yan Jin 2021Bioactive Materials2021,6,3:13
13Anti-wear and friction performance of ZrO_2 nanoparticles as lubricant additive显示文摘The surface of ZrO2 nanoparticles was modified with silane coupling agent KH-560 by dispersing the nanoparticles in 20#machine oil.The tribological performance of the 20#machine oil with ZrO2 nanoparticles was evaluated by a four-ball tester and a thrust-ring machine.The loss of the thrust-ring weight was measured by an electronic balance with a precision of 0.0001 g.The worn surface was examined under a metallographic microscope with 400-times magnification.The results showed that the average friction coefficient decreased by 27.34%,and that the weight loss of the thrust-ring indicated no wear or negative wear,the wear loss after six loads tests being-0.0163 g.The anti-wear(AW)and reducing friction(RF)abilities of the oil with ZrO2 nanoparticles addition were considerably improved,maximizing at an additive concentration of 0.5wt%.Shiyu Ma Shaohua Zheng Duxia Cao Hongna Guo 2010Particuology2010,8,5:11
14Direct assimilation of satellite radiance data in GRAPES variational assimilation system显示文摘Variational method is capable of dealing with observations that have a complicated nonlinear relation with model variables representative of the atmospheric state, and so make it possible to directly assimilate such measured variables as satellite radiance, which have a nonlinear relation with the model variables. Assimilation of any type of observations requires a corresponding observation operator, which establishes a specific mapping from the space of the model state to the space of observation. This paper presents in detail how the direct assimilation of real satellite radiance data is implemented in the GRAPES-3DVar analysis system. It focuses on all the components of the observation operator for direct assimilation of real satellite radiance data, including a spatial interpolation operator that transforms variables from model grid points to observation locations, a physical transformation from model variables to observed elements with different choices of model variables, and a data quality control. Assimilation experiments, using satellite radiances such as NOAA17 AMSU-A and AMSU-B (Advanced Microwave Sounding Unit), are carried out with two different schemes. The results from these experiments can be physically understood and clearly reflect a rational effect of direct assimilation of satellite radiance data in GRAPES-3DVar analysis system.ZHU GuoFu XUE JiShan ZHANG Hua LIU ZhiQuan ZHUANG ShiYu HUANG LiPing DONG PeiMing 2008Chinese Science Bulletin2008,53,22:11
15The program structure designing and optimizing tests of GRAPES physics显示文摘According to the modularization and standardization of program structure in Global/Regional Assimilation and Prediction System (GRAPES), the plug-compatible and transplantable regional meso-scale and global middle-range physics software package is established. The package's component integrality is comparative with the other advanced models physics. A three-level structure of connecting GRAPES physics and dynamic frame has been constructed. The friendly interface is designed for users to plug in their own physics packages. Phenomenon of grid-point storm rainfall in numerical prediction is analyzed with the numerical tests. The scheme of air vertical velocity calculation is improved. Optimizing tests of physics schemes are performed with the correlative parameters adjusting. The results show that the false grid-point storm rainfall is removed by precipitation scheme improving. Then the score of precipitation forecast is enhanced.XU GuoQiang CHEN DeHui XUE JiShan SUN Jian SHEN XueShun SHEN YuanFang HUANG LiPing WU XiangJun ZHANG HongLiang WANG ShiYu 2008Chinese Science Bulletin2008,53,22:11
16Targeted mutagenesis of amino acid transporter genes for rice quality improvement using the CRISPR/Cas9 system显示文摘High grain protein content(GPC) reduces rice eating and cooking quality(ECQ). We generated OsAAP6 and OsAAP10 knockout mutants in three high-yielding japonica varieties and one japonica line using the CRISPR/Cas9 system. Mutation efficiency varied with genetic background in the T_0 generation, and GPC in the T_1 generation decreased significantly,owing mainly to a reduction in glutelin content. Amylose content was down-regulated significantly in some Osaap6 and all Osaap10 mutants. The increased taste value of these mutants was supported by Rapid Visco Analysis(RVA) profiles, which showed higher peak viscosity and breakdown viscosity and lower setback viscosity than the wild type. There were no significant deficiencies in agronomic traits of the mutants. Targeted mutagenesis of OsAAP6 and OsAAP10, especially OsAAP10, using the CRISPR/Cas9 system can rapidly reduce GPC and improve ECQ of rice, providing a new strategy for the breeding cultivars with desired ECQ.Shiyu Wang Yihao Yang Min Guo Chongyuan Zhong Changjie Yan Shengyuan Sun 2020The Crop Journal2020,8,3:11
17Experimental comparison between aircraft fuel tank inerting processes using NEA and MIG显示文摘Fuel tank inerting technologies are able to reduce the fire risk by injection of inert gas into the ullage or fuel, the former called ullage washing and the latter fuel scrubbing. The Green On-Board Inert Gas Generation System(GOBIGGS) is a novel technology based on flameless catalytic combustion, and owning to its simple structure and high inerting efficiency, it has received a lot of attentions. The inert gas in the GOBIGGS is mainly comprised of CO_2, N_2, and O_2(hereinafter, Mixed Inert Gas(MIG)), while that in the On-Board Inert Gas Generation System(OBIGGS), which is one of the most widely used fuel tank inerting technologies, is NitrogenEnriched Air(NEA). The solubility of CO_2 is nearly 20 times higher than that of N_2 in jet fuels,so the inerting capability and performance are definitely disparate if the inert gas is selected as NEA or MIG. An inerting test bench was constructed to compare the inerting capabilities between NEA and MIG. Experimental results reveal that, if ullage washing is adopted, the variations of oxygen concentrations on the ullage and in the fuel are nearly identical no matter the inert gas is NEA or MIG. However, the ullage and dissolved oxygen concentrations of MIG scrubbing are always higher than those of NEA scrubbing.Lei SHAO Weihua LIU Chaoyue LI Shiyu FENG Chenchen WANG Jun PAN 2018Chinese Journal of Aeronautics2018,31,7:11
18Condition-based maintenance policy for gamma deteriorating systems显示文摘A condition-based maintenance model for gamma deteriorating system under continuous inspection is studied. This methodology uses a gamma distribution to model the material degradation, and the impact of imperfect maintenance actions on the system reliability is investigated. The state of a degrading system immediately after the imperfect maintenance action is assumed as a random variable and the maintenance time follows a geometric process. Furthermore, the explicit expressions for the long-run average cost and availability per unit time of the system are evaluated, an optimal policy (ξ*) could be determined numerically or analytically according to the optimization model. At last, a numerical example for a degrading system modeled by a gamma process is presented to demonstrate the use of this policy in practical applications.Lin Tan Zhijun Cheng Bo Guo Shiyu Gong 2010Journal of Systems Engineering and Electronics2010,21,1:10
19Essential roles of exosome and circRNA_101093 on ferroptosis desensitization in lung adenocarcinoma显示文摘Background:Resistance to ferroptosis,a regulated cell death caused by irondependent excessive accumulation of lipid peroxides,has recently been linked to lung adenocarcinoma(LUAD).Intracellular antioxidant systems are required for protection against ferroptosis.The purpose of the present studywas to investigate whether and how extracellular system desensitizes LUAD cells to ferroptosis.Methods:Established human lung fibroblasts MRC-5,WI38,and human LUAD H1650,PC9,H1975,H358,A549,and H1299 cell lines,tumor and matched normal adjacent tissues of LUAD,and plasma from healthy individuals and LUAD patients were used in this study.Immunohistochemistry and immunoblotting were used to analyze protein expression,and quantitative reverse transcription-PCR was used to analyze mRNA expression.Cell viability,cell death,and the lipid reactive oxygen species generationwere measured to evaluate the responses to ferroptosis.Exosomes were observed using transmission electron microscope.The localization of arachidonic acid(AA)was detected using click chemistry labeling followed by confocal microscopy.Interactions between RNAs and proteins were detected using RNA pull-down,RNA immunoprecipitation and photoactivatable ribonucleoside-enhanced crosslinking and immunoprecipitation methods.Proteomic analysis was used to investigate RNA-regulated proteins,and metabolomic analysis was performed to analyze metabolites.Cellderived xenograft,patient-derived xenograft,cell-implanted intrapulmonary LUAD mouse models and plasma/tissue specimens from LUAD patients were used to validate the molecular mechanism.Results:Plasma exosome from LUAD patients specifically reduced lipid peroxidation and desensitized LUAD cells to ferroptosis.A potential explanation is that exosomal circRNA_101093(cir93)maintained an elevation in intracellular cir93 in LUAD to modulate AA,a poly-unsaturated fatty acid critical for ferroptosisassociated increased peroxidation in the plasma membrane.Mechanistically,cir93 interacted with and increased fatty acid-binding protein 3(FABP3),which transported AA and facilitated its reaction with taurine.Thus,global AA was reduced,whereas N-arachidonoyl taurine(NAT,the product of AA and taurine)was induced.Notably,the role of NAT in suppressing AA incorporation into the plasma membrane was also revealed.In pre-clinical in vivo models,reducing exosome improved ferroptosis-based treatment.Conclusion:Exosome and cir93 are essential for desensitizing LUAD cells to ferroptosis,and blocking exosome may be helpful for future LUAD treatment.Xiao Zhang Yunhua Xu Lifang Ma Keke Yu Yongjie Niu Xin Xu Yi Shi Susu Guo Xiangfei Xue Yikun Wang Shiyu Qiu Jiangtao Cui Hong Wang Xiaoting Tian Yayou Miao Fanyu Meng Yongxia Qiao Yongchun Yu Jiayi Wang 2022Cancer Communications2022,42,4:10
20Dynamics Model of Carrier-based Aircraft Landing Gears Landed on Dynamic Deck显示文摘In order to study the carrier-based aircraft landing laws landed on the carrier,the dynamics model of carrier-based aircraft landing gears landed on dynamic deck is built.In this model,the interactions of the carrier-based aircraft landing attitude and the damping force acting on landing gears are considered,and the influence of dynamic deck is introduced into the model through the deck normal vectors.The wheel-deck coordinate system is put forward to solve the complex simulation problem of force-on-wheel which comes from the dynamic deck.At last,by simulation,it is demonstrated that the model can be applied to landing attitude when the carrier-based aircraft is landing on the dynamic deck,it is also proved that the model is comprehensive and suitable for any abnormal landing situation.Zhang Wen,Zhang Zhi,Zhu Qidan,Xu Shiyue Department of Automation,Harbin Engineering University,Harbin 150001,China 2009Chinese Journal of Aeronautics2009,22,4:10
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