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An Effective Green Porous Structural Adhesive for Thermal Insulating,Flame-Retardant,and Smoke-Suppressant Expandable Polystyrene Foam

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Engineering 2022年第10期17卷 151-160页

作者： Meng-En Li Hai-bo zhao Jin-bo Cheng Ting wang Teng Fu Ai-Ning Zhang yu-zhong wang The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE)&State Key Laboratory of Polymer Materials Engineering&National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan) College of ChemistrySichuan UniversityChengdu 610064China

To develop an efficient way to overcome the contradiction among flame retardancy,smoke suppression,and thermal insulation in expanded polystyrene(EPS)foams,which are widely used insulation materials in buildings,a novel"green"porous bio-based flame-retard ant starch(FRS)coating was designed from starch modified with phytic acid(PA)that simultaneously acts as both a flame retardant and an *** porous FRS coating has open pores,which,in combination with the closed cells formed by EPS beads,create a hierarchically porous structure in FRS-EPS that results in superior thermal insulation with a lower thermal conductivity of 27.0 mW·(m·K)^(-1).The resultant FRS-EPS foam showed extremely low heat-release rates and smoke-production release,indicating excellent fire retardancy and smoke *** specific optical density was as low as 121,which was 80.6%lower than that of neat EPS,at *** FRS-EPS also exhibited self-extinguishing behavior in vertical burning tests and had a high limiting oxygen index(LOI)value of 35.5%.More interestingly,after being burnt with an alcohol lamp for 30 min,the top side temperature of the FRS-EPS remained at only 140℃with ignition,thereby exhibiting excellent fire *** analysis confirmed the intumescent action of FRS,which forms a compact phosphorus-rich hybrid barrier,and the phosphorus-containing compounds that formed in the gas phase contributed to the excellent flame retardancy and smoke suppression of *** novel porous biomass-based FRS system provides a promising strategy for fabricating polymer foams with excellent flame retardancy,smoke suppression,and thermal insulation.

关键词： Biomass porous coating Expanded polystyrene foam Low thermal conductivity Flame retardancy Smoke suppression

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Moduli Space of IIB Superstring and SUYM in AdS5 × S^5

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Communications in Theoretical Physics 2006年第2期45卷 301-314页

作者： HOU bo-yu HOU bo-yuan wang Xiao-hui XIONG Chuan-hua yuE Rui-Hong Institute of Modern Physics Northwest University Xi＇an 710069 China Graduate School the Chinese Academy of Sciences Beijing 100039 China

This paper consists of two parts. In part I, we interpret the hidden symmetry of the moduli space of lib superstring on AdS5× S^5 in terms of the chiral embedding in AdS5, which turns out to be the CP^3 conformal affine Toda model. We review how the position μ of poles in the Riemann-Hilbert formulation of dressing transformation and the value of loop parameter μ in the vertex operator of affine algebra determine the moduli space of the soliton solutions, which describes the moduli space of the Green-Schwarz superstring. We show also how this affine SU（4） symmetry affinizes the conformal symmetry in the twistor space, and how a soliton string corresponds to a Robinson congruence with twist and dilation spin coefficients μ of twistor. In part Ⅱ by extending the dressing symmetric *** of lib string in AdS5×S^5 to the D3 brane, we find a gauged WZW aztion of Higgs yang-Mills field including the 2-cocycle of axially anomaly. The left and right twistor structures of left and right a-planes glue into an ambitwistor. The symmetry group of Nahm equations is centrally extended to an affine group, thus we explain why the spectral curve is given by affine Toda.

关键词： AdS/CFT correspondence Green-Schwarz superstring affine Toda

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Growth of tandem long-mat rice seedlings using controlled release fertilizers:Mechanical transplantation can be more economical and high yielding

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Journal of Integrative Agriculture 2023年第12期22卷 3652-3666页

作者： HE Wen-jun HE Bin WU bo-yang wang yu-hui YAN Fei-yu DING Yan-feng LI Gang-hua Sanya Institute of Nanjing Agricultural University/Jiangsu Collaborative Innovation Center for Modern Crop Production/Key Laboratory of Crop Physiology Ecology and Production Management Nanjing Agricultural UniversityNanjing 210095P.R.China National Engineering and Technology Center for Information Agriculture Nanjing 210095P.R.China China-Kenya Belt and Road Joint Laboratory on Crop Molecular Biology Nanjing 210095P.R.China School of Life Sciences and Food Engineering Huaiyin Institute of TechnologyHuai’an 223003P.R.China

The traditional soil-based rice seedling production methods for mechanical transplanting are resource-intensive,time consuming and *** improvement and optimization of nutrient management in soil-less nursery raising methods like tandem long-mat seedlings(TLMS)are necessary for the resource-efficient cultivation of *** the present study,a controlled-release fertilizer(CRF)-polymer-coated compound fertilizer with 3 months release period(PCCF-3M)was applied as seedling fertilizer(SF),and five different dosages of SF(SF-0,SF-10,SF-20,SF-30,and SF-40)were compared with an organic substrate as the control(CK).Among all SF treatments,the best results were obtained with the application of 20 g/tray of SF(SF-20),as the seedling quality and machine transplanting quality were comparable to those of *** contrast,the lower dosages(SF-0 and SF-10)resulted in low nitrogen content and reduced shoot growth,while the higher dosages(SF-30 and SF-40)resulted in toxicity(increased malondialdehyde accumulation)and inhibited the root ***,SF-20 increased panicle number(5.6-7.0%)and yield(4.3-5.3%)compared with CK,which might be related to the remaining SF entangled in the roots supporting the tiller growth of rice seedlings in the ***,SF-20 reduced the seedling block weight(53.1%)and cost of seedling production(23.5%)but increased the gross margin,indicating that it was easy to handle and *** together,our results indicate that SF-20 is a cost-effective way to promote the growth and transplanting efficiency of rice *** our knowledge,this study is the first to determine the optimum dosage of CRF for the soil-less production of rice seedlings.

关键词： machine-transplanted rice tandem long-mat seedlings controlled release fertilizer seedling quality yield

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PC-based frame synchronization method for byte-misaligned stream

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The Journal of China Universities of Posts and Telecommunications 2014年第3期21卷 23-28,34页

作者： CAI yu-chen wang Zhen-hua ZHANG Guo-feng CHEN zhao-hui Software Department Beijing Institute of Control Engineering

As the traditional character-oriented frame synchronization methods are no longer applicable to the byte-misaligned stream, and the efficiency of the bit-oriented method is hardly acceptable, a character-oriented bit-shift stream frame synchronization （COBS-FS） method is presented. In order to measure the performance of the given method, a bit-oriented frame synchronization method, based on Knuth-Morris-Pratt （KMP-FS） algorithm, is used for comparison. It is proven in theory that the COBS-FS has a much lower cost in frame header searching. Experiment shows that the COBS-FS method is with better performance than the KMP-FS algorithm in both computational effort and execution time.

关键词： byte-misaligned stream frame synchronization sliding window method KMP

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Super-high bed sintering for iron ores:problems ascertainment

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Journal of Iron and Steel Research International 2024年第5期31卷 1063-1070页

作者： Liang-ping Xu hui-bo Liu yu-chao zhao Qiang zhong zhong-lin Dong Guang-hui Li Tao Jiang School of Minerals Processing and Bioengineering Central South UniversityChangsha410083HunanChina

Super-high bed sintering process is an important development direction of iron ore sintering for its lower emission and higher ***,there is a lack of deep understanding of the uneven quality of super-high bed sintering products,and the deterioration of reduction disintegration performance,the thickening of hearth layer and the reduction in energy-saving effect are perplexing enterprises and *** ascertain the problems of super-high bed sintering,ten sintering machines with the areas of 265,280,360,550 and 660 m^(2)and bed depth above 900 mm were sampled and *** results showed that problems were mainly shown in the unevenness of chemical composition,macrostructure,mechanical strength and metallurgical *** chemical composition exhibits severe segregation in both horizontal and vertical directions,with basicity segregation reaching as high as *** uneven macrostructure of sinter is reflected in a 10%difference in porosity and mechanical strength increase in 16%–19%along the vertical *** reducibility and reduction disintegration performance gradually deteriorate along the bed depth,with a difference of 10.5%in reducibility and 7.3%in RDI−0.5 mm(reduction disintegration index of sinter with size smaller than 0.5 mm).

关键词： Super-high bed sintering Uneven sinter performance Segregation Agglomeration Iron ore

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Recent Progress in Two-dimensional Nanomaterials Following Graphene for Improving Fire Safety of Polymer(Nano)composites

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Chinese Journal of Polymer Science 2021年第8期39卷 935-956,I0004页

作者： Wei Cai Bi-bo wang Xin wang yu-Lu Zhu zhao-Xin Li Zhou-Mei Xu Lei Song Wei-zhao hua yuan hua State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230000China Suzhou Advanced Research Institute University of Science and Technology of ChinaSuzhou 215000China

The high fire safety of polymer nanocomposites is being pursued by research institutions around the *** addition to intrinsic flame retardancy strategy,the additive-type flame retardants have attracted increasing attention due to low commercial cost and easy fabrication ***,traditional additive-type flame retardants usually need high addition amount to achieve a desirable effect which causes many side-effects on the overall performance of polymer materials,such as deteriorated mechanical property and *** present two-dimensional(2D)nanomaterials have also been applied to reduce the fire hazards of polymer(nano)composites with the coupling of barrier function and catalysis as well as carbonization *** though most research work mainly focus on graphene-based flame retardants,more emerging two-dimensional nanomaterials are taking away research attention,due to their complementary and unique properties,mainly including hexagonal boron nitride(h-BN),molybdenum disulfide(MoS2),metal organic frameworks(MOF),carbon nitride(CN),titanium carbide(MXene)and black phosphorene(BP).In this review,except for graphene,the flame retardant mechanism involving different layered nanomaterials are also ***,the functionalization method and flame retardancy effect of different layered nanomaterials are emphatically discussed for offering an effective reference to solve the fire hazards of polymer ***,this work objectively evaluates the practical significance of polymer/layered nanomaterials composites for industrial application.

关键词： Polymer(nano)composites Layered nanomaterials Fire safety Flame retardant mechanism

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Effect of seed particles content on texture formation of Si_3N_4 ceramics by gel-casting in a strong magnetic field

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Advances in Manufacturing 2015年第3期3卷 193-201页

作者： Zhi-Gang yang Jian-bo yu Chuan-Jun Li Kang Deng zhong-Ming Ren Qiu-Liang wang Yin-Ming Dai hui wang Shanghai Key Laboratory of Modern Metallurgy and Materials Processing Shanghai University Institute of Electrical Engineering Chinese Academy of Sciences

In this paper, the textured Si3N4 ceramics were prepared by adding seed particles during gel-casting in the magnetic field of 6 T, followed by pressureless sintering. The effect of pH on the stability and dispersibility of Si3N4 slurry and the effect of seed particles content on texture formation of SiaN4 ceramics were both studied. Those results showed that the slurry with good stability and dispersibility was obtained when pH was about 11.6. The a or b-axis of Si3N4 particles or crystals was aligned parallel to the direction of the magnetic field in the magnetic field of 6 T. The degree of texture of Si3N4 ceramics further increased during sintering. With the increasing of additional β-Si3N4 particles in the magnetic field of 6 T, the degree of texture increased from 0.19 without seed particles to 0.76 with 9% （mass fraction） seed particles. The increase of seed particles content promoted the texture formation of Si3N4 ceramics.

关键词： Silicon nitride Gel-casting High magnetic field Texture Pressureless sintering

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Femtosecond laser-induced periodic surface structures on hard and brittle materials

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Science China(Technological Sciences) 2024年第1期67卷 19-36页

作者： zhao GuoXu wang Gong LI yunFei wang Lei LIAN yuDong yu yu zhao hui wang yuLei LU ZhiWei Center for Advanced Laser Technology Hebei University of TechnologyTianjin 300401China Hebei Key Laboratory of Advanced Laser Technology and Equipment Tianjin 300401China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China School of Information and Electrical Engineering Hebei University of EngineeringHandan 056038China

Hard and brittle materials have high hardness,excellent optical stability,chemical stability,and high thermal ***,they have huge application potential in various fields,such as optical components,substrate materials,and quantum information,especially under harsh conditions,such as high temperatures and high *** laser direct writing technology has greatly promoted the development of femtosecond laser-induced periodic surface structure(Fs-LIPSS or LIPSS by a femtosecond laser)applications of hard and brittle materials due to its high precision,controllability,and three-dimensional processing *** far,LIPSSs have been widely used in material surface treatment,optoelectronic devices,and ***,a consensus has not been reached regarding the formation mechanism of LIPSSs on hard and brittle *** this paper,three widely accepted LIPSS formation mechanisms are introduced,and the characteristics and applications of LIPSSs on diamonds,silicon,silicon carbide,and fused silica surfaces in recent years are *** addition,the application prospects and challenges of LIPSSs on hard and brittle materials by a femtosecond laser are discussed.

关键词： laser-induced periodic surface structures hard and brittle materials femtosecond laser

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Esophageal myoepithelial carcinoma:Four case reports

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World Journal of Clinical Cases 2022年第9期10卷 2938-2947页

作者： Hao Lu hui-Ping zhao Yi-yang Liu Juan yu Rui wang Jian-bo Gao Department of Radiology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina

BACKGROUND Myoepithelial carcinoma(MC)is a rare malignant neoplasm that mainly occurs in the salivary *** can be confused with many other tumors when arising outside the salivary glands because it presents with a wide spectrum of cytomorphological and immunohistochemical *** the best of our knowledge,esophageal MC has not been previously *** purpose of this study was to describe the imaging and clinicopathological features of esophageal MC to improve the understanding of the *** SUMMARY Three men and one woman diagnosed with esophageal MC were enrolled in this *** primary clinical symptom was *** mass was mainly located in the middle *** tests revealed that two patients who underwent tumor abnormal protein were *** resection was performed for all patients with no adjuvant ***-eosin staining showed infiltrative growth of epithelial cells with hyperchromatic and pleomorphic nuclei toward the *** showed that all patients were positive for P63,and most patients were positive for SOX-10,AE1/AE3,P40,and *** Ki-67 values were all higher than 60%.Patient one died one month after discharge from an unknown *** two lost to *** patient three’s four-month review,enhanced computed tomography(CT)showed anastomosis recurrence and bilateral lung *** abandoned treatment and lost to *** four attended review appointments regularly and remained in a good general *** Here,we present the first report of esophageal MC and review the relevant *** MC is more likely to occur in the middle esophagus in older patients with male dominance.A fungating type observed on CT scanning may help narrow down the differential *** change or necrosis may occur in larger *** final diagnosis should be made according to the pathological *** treatment for MC is surgical resec

关键词： Myoepithelial carcinoma Esophagus Computed tomography Diagnosis Immunohistochemistry Prognostic Case report

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Robust Approximation-Based Event-Triggered MPC for Constrained Sampled-Data Systems

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Journal of Systems Science & Complexity 2021年第6期34卷 2109-2124页

作者： wang Tao KANG yu LI Pengfei zhao yun-bo yu Peilong Department of Automation University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230027China Institute of Advanced Technology University of Science and Technology of ChinaHefei 230027China College of Information Engineering Zhejiang University of TechnologyHangzhou 310023China

In this paper,an approximation-based event-triggered model predictive control(AETMPC)strategy is proposed to implement event-triggered model predictive control for continuous-time constrained nonlinear systems under the digital *** the AETMPC strategy,both of the optimal control problem(OCP)and the triggering conditions are defined in a discrete-time manner based on approximate discrete-time models,while the plant under control is continuous *** doing so,sensing load is alleviated because the triggering condition does not need to be checked continuously,and the computation of the OCP is simpler since which is calculated in the discrete-time ***,robust constraints are satisfied in a continuous-time sense by taking inter-sampling behavior into consideration,and a novel constraint tightening approach is presented ***,the feasibility of the AETMPC strategy is analyzed and the associated stability of the overall system is ***,this strategy is validated by a numerical example.

关键词： Approximations event-triggered control model predictive control sampled-data systems

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