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Solution and stability of continuous-time cross-dimensional linear systems

Qing-le Zhang, Biao Wang, Jun-e Feng,zqlcfc03@163.com,wangbiao9956@163.com,fengjune@sdu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 2,   Pages 141-286 doi: 10.1631/FITEE.1900504

Abstract: We investigate the solution and stability of continuous-time linear systems (CCDLSs) with dimension bounded by and . Using the integral iteration method, the solution to CCDLSs can be obtained. Based on the new algebraic expression of the solution and the Jordan decomposition method of matrix, a necessary and sufficient condition is derived for judging whether a CCDLS is asymptotically stable with a given initial state. This condition demonstrates a method for finding the domain of attraction and its relationships. Then, all the initial states that can be stabilized are studied, and a method for designing the corresponding controller is proposed. Two examples are presented to illustrate the validity of the theoretical results.

Keywords： Cross-dimensional     V-addition     V-product     Asymptotic stability     Stabilization    

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Sinks of steel in China–addition to in-use stock, export and loss

Hua GUO,Tianzhu ZHANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 141-149 doi: 10.1007/s11783-014-0696-3

Abstract: The researchers conclude that addition to in-use stock is the main driver of steel demand and that the10-year average addition to in-use stock accounted for 77% of the steel sinks, in which 55% of the addition

Keywords： steel demand     driver     Material Flow Analysis (MFA)     Substance Flow Analysis (SFA)     addition to in-use stock    

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Effect of short-term atrazine addition on the performance of an anaerobic/anoxic/oxic process

Changyong WU, Xiaoling LI, Zhiqiang CHEN, Yongzhen PENG,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 2,   Pages 150-156 doi: 10.1007/s11783-010-0020-9

Abstract: wastewater treatment process was implemented to treat domestic wastewater with short-term atrazine additionThe results showed that atrazine addition did not affect the removal of COD.The specific NH NO reduction rate decreased slightly due to the short-term atrazine addition.The phosphorus removal rate was not affected by the short-term addition of atrazine under the appliedHowever, more poly-hydroxy-alkanoate (PHA) was generated and utilized during atrazine addition.

Keywords： biological nutrient removal     atrazine     anaerobic/anoxic/oxic (A2O) process     oxygen demand removal     oxygen uptake rate (OUR)    

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Hydration, microstructure and autogenous shrinkage behaviors of cement mortars by addition of superabsorbent

Beibei SUN, Hao WU, Weimin SONG, Zhe LI, Jia YU

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1274-1284 doi: 10.1007/s11709-020-0656-x

Abstract: Superabsorbent Polymer (SAP) has emerged as a topic of considerable interest in recent years. The present study systematically and quantitively investigated the effect of SAP on hydration, autogenous shrinkage, mechanical properties, and microstructure of cement mortars. Influences of SAP on hydration heat and autogenous shrinkage were studied by utilizing TAM AIR technology and a non-contact autogenous shrinkage test method. Scanning Electron Microscope (SEM) was employed to assess the microstructure evolution. Although SAP decreased the peak rate of hydration heat and retarded the hydration, it significantly increased the cumulative heat, indicating SAP helps promote the hydration. Hydration promotion caused by SAP mainly occurred in the deceleration period and attenuation period. SAP can significantly mitigate the autogenous shrinkage when the content ranged from 0 to 0.5%. Microstructure characteristics showed that pores and gaps were introduced when SAP was added. The microstructure difference caused by SAP contributed to the inferior mechanical behaviors of cement mortars treated by SAP.

Keywords： Superabsorbent Polymer     mechanical properties     hydration heat     autogenous shrinkage     microstructure    

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Autoimmunity in acute ischemic stroke and the role of blood—brain barrier: the dark side or the light one?

Nikolay V. Tsygan, Alexandr P. Trashkov, Igor V. Litvinenko, Viktoriya A. Yakovleva, Alexandr V.

Frontiers of Medicine 2019, Volume 13, Issue 4,   Pages 420-426 doi: 10.1007/s11684-019-0688-6

Abstract: This article presents a synopsis of the current data on the mechanisms of blood—brain barrier (BBB) alteration and autoimmune response in acute ischemic stroke. Most researchers confirm the relationship between the severity of immunobiochemical changes and clinical outcome of acute ischemic stroke. Ischemic stroke is accompanied by aseptic inflammation, which alters the brain tissue and exposes the co-stimulatory molecules of the immune system and the neuronal antigens. To date, BBB is not considered the border between the immune system and central nervous system, and the local immune subsystems are found within and behind the BBB. BBB disruption contributes to the leakage of brain autoantigens and induction of secondary autoimmune response to neuronal antigens and long-term inflammation. Glymphatic system function is altered and jeopardized both in hemorrhagic and ischemic stroke types. The receptors of innate immunity (toll-like receptor-2 and toll-like receptor-4) are also involved in acute ischemia—reperfusion injury. Immune response is related to the key processes of blood clotting and fibrinolysis. At the same time, the stroke-induced immune activation may promote reparation phenomena in the brain. Subsequent research on the reduction of the acute ischemic brain injury through the target regulation of the immune response is promising.

Keywords： stroke     blood–brain barrier     autoimmunity     innate immunity     inflammation     cell death    

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Emulsification for castor biomass oil

Dongxiang ZHANG, Yuanping LIN, Anmei LI, V. V. TARASOV

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 1,   Pages 96-101 doi: 10.1007/s11705-010-0553-2

Abstract: The effect of the emulsifier formula on the stability of castor oil-water system was studied through compounding three groups of emulsifiers from the aspects of stability factor of absorbance, centrifuge stability, demulsification time in quiescence, appearance of the droplets, and viscosity. The best emulsifier formula for castor biomass oil was the composite formula of sorbitan monooleate and polyoxyethylene sorbitan monostearate. Correlation exists between the stability of emulsion and the viscosity/particle size of the droplets, with better stability in the case of greater viscosity or narrower distribution of particle size in the emulsion of castor oil-water system. Methanol added to the castor oil-water system may decrease the viscosity of the emulsion. Comparing the castor oil-water emulsion with methanol-castor oil-water emulsion, the optimal hydrophilic and lipophilic balance (HLB) value based on castor oil-water system was acquired between 6.6 and 7.5, while the optimal HLB value based on the methanol-castor oil-water system was between 5.5 and 6.0. The optimal HLB value of methanol-castor oil-water system gradually moved to that of castor oil-water emulsion with adding more water.

Keywords： castor oil     biomass oil     emulsification     stability     viscosity     corrosivity    

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Mass loss and nutrient dynamics during litter decomposition in response to warming and nitrogen addition

Haiyan REN, Jie QIN, Baolong YAN, Alata, Baoyinhexige, Guodong HAN

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 1,   Pages 64-70 doi: 10.15302/J-FASE-2017194

Abstract: However, the temporal patterns of mass loss and nutrient release in response to warming and nitrogen additionA 2-year decomposition experiment aimed to examine the effects of warming and nitrogen addition on decompositionThe effects of warming and nitrogen addition on decomposition of litter of , a dominant species in aWarming and nitrogen addition significantly enhanced litter mass loss by 10% and 16%, respectively, andThis study indicates that warming and nitrogen addition increased litter mass loss through altering litter

Keywords： climate warming     grassland     litter decomposition     nitrogen deposition     nutrient release    

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Synergistic effect of V and Fe in Ni/Fe/V ternary layered double hydroxides for efficient and durable

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 102-115 doi: 10.1007/s11705-022-2179-6

Abstract: Herein, via a one-pot hydrothermal method, Ni/Fe/V ternary layered double hydroxides (NiFeV-LDH) derivedBy changing the feeding ratio of Fe and V salts, the prepared ternary hydroxides were optimized.At an Fe:V ratio of 0.5:0.5, NiFeV-LDH exhibits outstanding OER activity superior to that of the binarybimetallic hydroxide layers: (a) Fe plays a crucial role as the active site; (b) electron-withdrawing Vstabilizes the high valence state of Fe, thus accelerating the OER process; (c) V further offers great

Keywords： oxygen evolution reaction     electrocatalysts     ternary layered double hydroxides     long-term stability    

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Association between ICU quality and in-hospital mortality of V-V ECMO-supported patients—the ECMO quality

Frontiers of Medicine doi: 10.1007/s11684-023-1014-x

Abstract: explore the influence of intensive care unit (ICU) quality on in-hospital mortality of veno-venous (V-VThe study involved all V-V ECMO-supported patients in 318 of 1700 tertiary hospitals from 2017 to 2019Among the 2563 V-V ECMO-supported patients in 318 hospitals, a significant correlation was found betweenand the total ICU mortality rate were independent risk factors for higher in-hospital mortality of V-VMeanwhile, the V-V ECMO center volume was a protective factor (cutoff of ≥ 50 cases within the 3-year

Keywords： veno-venous extracorporeal membrane oxygenation     in-hospital mortality     high-volume centers     quality control     intensive care unit capacity parameters    

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A concise review about fracture assessments of brittle solids with V-notches

Hsien-Yang YEH, Bin YANG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 478-485 doi: 10.1007/s11709-019-0520-z

Abstract: review of recent studies about the fracture assessments of elastic brittle solid materials containing V-notchesIn this preliminary and brief survey, elastic stress distributions in V-notched solids are discussed

Keywords： fracture     assessment     brittle solids     V-notches     review    

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V-shaped substrate for surface and volume enhanced Raman spectroscopic analysis of microplastics

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1578-8

Abstract:

● V-shaped substrate was obtained for SERS analysis of microplastics

Keywords： SERS     V-shaped     AAO     Microplastic     Atmospheric aerosol    

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Study on modeling and simulation analysis for tailless configured V/STOL

Fan Yong,Zhu Jihong,Meng Xianyu,Liu Kai,Yang Xili

Strategic Study of CAE 2011, Volume 13, Issue 3,   Pages 107-112

Abstract:

The mathematical model was studied by mechanical analysis and CFD (computing fluid dynamics) computation. Besides, an intelligent adaptive based control law was proposed and the optimization approach is employed to solve the constrained control allocation problem. The results show good closed loop performance and validate the intelligent optimization approach of constrained control allocation for flight control.

Keywords： tailless configured aerial vehicle     V/STOL     dynamic modeling     flight control    

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Carbon-coated lithium titanate: effect of carbon precursor addition processes on the electrochemical

Shilei Ding, Zelong Jiang, Jing Gu, Hongliang Zhang, Jiajia Cai, Dongdong Wang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 1,   Pages 148-155 doi: 10.1007/s11705-020-2022-x

Abstract: were synthesized using the ball-milling-assisted calcination method with different carbon precursor additionand the reversible capacity after 300 cycles exceeds 121.3 mA·h·g in the voltage range of 1.0–3.0 V.

Keywords： lithium titanate     carbon-coated     carbon precursor     synthetic process    

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A Data and Knowledge Collaboration Strategy for Decision-Making on the Amount of Aluminum Fluoride Addition Article

Weichao Yue、 Weihua Gui、 Xiaofang Chen、 Zhaohui Zeng、 Yongfang Xie

Engineering 2019, Volume 5, Issue 6,   Pages 1060-1076 doi: 10.1016/j.eng.2019.10.005

Abstract: Making the decision on the amount of AlF3 addition (referred to in this work as MDAAA) isIn addition, the accuracy of MDAAA based on the proposed method is better than those based on other methods

Keywords： AlF 3 addition     Fuzzy cognitive maps     Learning algorithms     State transition algorithm     Fuzzy    

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Effects of ionic impurities on crystallization of cobalamin

Baoli SHAO, Hui CHEN, Shuang WANG, Haijun WANG, Shenmin XU,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 1,   Pages 70-74 doi: 10.1007/s11705-009-0293-3

Abstract: In addition, the crystal habit changes can be monitored by particle vision measurement (PVM).

Keywords： cobalamin     impurity     particle     addition     technique    

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Title Author Date Type Operation

Solution and stability of continuous-time cross-dimensional linear systems

Qing-le Zhang, Biao Wang, Jun-e Feng,zqlcfc03@163.com,wangbiao9956@163.com,fengjune@sdu.edu.cn

Journal Article

Sinks of steel in China–addition to in-use stock, export and loss

Hua GUO,Tianzhu ZHANG

Journal Article

Effect of short-term atrazine addition on the performance of an anaerobic/anoxic/oxic process

Changyong WU, Xiaoling LI, Zhiqiang CHEN, Yongzhen PENG,

Journal Article

Hydration, microstructure and autogenous shrinkage behaviors of cement mortars by addition of superabsorbent

Beibei SUN, Hao WU, Weimin SONG, Zhe LI, Jia YU

Journal Article

Autoimmunity in acute ischemic stroke and the role of blood—brain barrier: the dark side or the light one?

Nikolay V. Tsygan, Alexandr P. Trashkov, Igor V. Litvinenko, Viktoriya A. Yakovleva, Alexandr V.

Journal Article

Emulsification for castor biomass oil

Dongxiang ZHANG, Yuanping LIN, Anmei LI, V. V. TARASOV

Journal Article

Mass loss and nutrient dynamics during litter decomposition in response to warming and nitrogen addition

Haiyan REN, Jie QIN, Baolong YAN, Alata, Baoyinhexige, Guodong HAN

Journal Article

Synergistic effect of V and Fe in Ni/Fe/V ternary layered double hydroxides for efficient and durable

Journal Article

Association between ICU quality and in-hospital mortality of V-V ECMO-supported patients—the ECMO quality

Journal Article

A concise review about fracture assessments of brittle solids with V-notches

Hsien-Yang YEH, Bin YANG

Journal Article

V-shaped substrate for surface and volume enhanced Raman spectroscopic analysis of microplastics

Journal Article

Study on modeling and simulation analysis for tailless configured V/STOL

Fan Yong,Zhu Jihong,Meng Xianyu,Liu Kai,Yang Xili

Journal Article

Carbon-coated lithium titanate: effect of carbon precursor addition processes on the electrochemical

Shilei Ding, Zelong Jiang, Jing Gu, Hongliang Zhang, Jiajia Cai, Dongdong Wang

Journal Article

A Data and Knowledge Collaboration Strategy for Decision-Making on the Amount of Aluminum Fluoride Addition

Weichao Yue、 Weihua Gui、 Xiaofang Chen、 Zhaohui Zeng、 Yongfang Xie

Journal Article

Effects of ionic impurities on crystallization of cobalamin

Baoli SHAO, Hui CHEN, Shuang WANG, Haijun WANG, Shenmin XU,

Journal Article