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| 1 | Earth observation satellite scheduling for emergency tasks显示文摘The earth observation satellites(EOSs)scheduling problem for emergency tasks often presents many challenges.For example,the scheduling calculation should be completed in seconds,the scheduled task rate is supposed to be as high as possible,the disturbance measure of the scheme should be as low as possible,which may lead to the loss of important observation opportunities and data transmission delays.Existing scheduling algorithms are not designed for these requirements.Consequently,we propose a rolling horizon strategy(RHS)based on event triggering as well as a heuristic algorithm based on direct insertion,shifting,backtracking,deletion,and reinsertion(ISBDR).In the RHS,the driven scheduling mode based on the emergency task arrival and control station time window events are designed to transform the long-term,large-scale problem into a short-term,small-scale problem,which can improve the schedulability of the original scheduling scheme and emergency response sensitivity.In the ISBDR algorithm,the shifting rule with breadth search capability and backtracking rule with depth search capability are established to realize the rapid adjustment of the original plan and improve the overall benefit of the plan and early completion of emergency tasks.Simultaneously,two heuristic factors,namely the emergency task urgency degree and task conflict degree,are constructed to improve the emergency task scheduling guidance and algorithm efficiency.Finally,we conduct extensive experiments by means of simulations to compare the algorithms based on ISBDR and direct insertion,shifting,deletion,and reinsertion(ISDR).The results demonstrate that the proposed algorithm can improve the timeliness of emergency tasks and scheduling performance,and decrease the disturbance measure of the scheme,therefore,it is more suitable for emergency task scheduling. | SUN Haiquan XIA Wei HU Xiaoxuan XU Chongyan | 2019 | Journal of Systems Engineering and Electronics2019，30，5： | 8 |
| 2 | Basivertebral foramen could be connected with intravertebral cleft: a potential risk factor of cement leakage in percutaneous kyphoplasty显示文摘 | Chongyan Wang Shunwu Fan Junhui Liu Letu Suyou Zhi Shan Fengdong Zhao | 2013 | The Spine Journal2013，，： | 2 |
| 3 | Surface morphology characterization of unidirectional carbon fibre reinforced plastic machined by peripheral milling显示文摘This paper aims to characterise surface morphology and 3D roughness parameters of unidirectional carbon fibre reinforced plastic(UD-CFRP)milled at 0°,45°,90°,and 135°fibre orientation angles(FOAs).Side milling experiments are conducted on UD-CFRP laminates.Surface damage forms and texture direction of milled surface are analysed.Spatial frequency of defects on CFRP surface is quantitatively determined using radially averaged 2D PSD.The kinematicdynamic surface topography is reconstructed considering feed,runout and vibration,then the ideal roughness parameters,S_(a),S_(q),S_(sk),and S_(ku)are calculated and compared with the measured ones,finally the material factor-induced roughness components are quantified.Results show that CFRP surface has no regular feed marks.The frequency of fibre breakage or surface defects is greater than tooth passing frequency.FOAs sorted by their average S_(a)in descending order is135°>90°>45°>0°,where surface defects contribute 93.9%,77.1%,73.2%,72.2%of the total roughness respectively,which suggests that surface defects show a more important role than tool kinematics and vibration in formation of milled surface.The negative Skewness(Ssk<0)and high Kurtosis(S_(ku)=4.0–11.5)of milled surface signify porosity and the presence of many anomalous deep valleys in milled surface,respectively. | Chongyan CAI Jiaqiang DANG Qinglong AN Weiwei MING Ming CHEN | 2022 | Chinese Journal of Aeronautics2022，35，2： | 2 |
| 4 | Surface properties of nitrogen-ion-implanted TiNi shape memory alloy显示文摘X-ray diffraction (XRD), auger electron spectroscopy (AES), and X-ray photoelectron spectroscopy (XPS) were used tocharacterize the surface properties of the N+-ion-implanted TiNi alloy. There is a high nitrogen content region at the outermost surfaceof the N+-ion-implanted TiNi alloy. The detected nitrogen exists mainly in the form of TiN. Small amounts of Ti3O5 and TiO2 also existon the surface of the N+-ion-implanted TiNi sample. The modified layer of the N+-ion-implanted sample can work as an obstacle layerof the nickel’s dissolution, which obstructs Ni dissolving from the TiNi surface effectively. | Chongyan Leng Teruo Asaoka Rong Zhou | 2006 | Journal of University of Science and Technology Beijing2006，13，2： | 1 |
| 5 | Expression of aspartic protease from Neurospora crassa in industrial ethanol- producing yeast and its application in ethanol production显示文摘 | GUO Zhongpeng QIU Chongyan ZHANG Liang | 2011 | Enzyme and Microbial Technology2011，48，2： | 1 |
| 6 | Highly Thermo-Conductive Three-Dimensional Graphene Aqueous Medium显示文摘Highly thermo-conductive aqueous medium is a crucial premise to demonstrate high-performance thermal-related applications.Graphene has the diamond comparable thermal conductivity,while the intrinsic two-dimensional reality will result in strong anisotropic thermal conductivity and wrinkles or even crumples that significantly sacrifices its inherent properties in practical applications.One strategy to overcome this is to use three-dimensional(3D)architecture of graphene.Herein,3D graphene structure with covalent-bonding nanofins(3D-GS-CBF)is proposed,which is then used as the filler to demonstrate effective aqueous medium.The thermal conductivity and thermal conductivity enhancement efficiency of 3D-GS-CBF(0.26 vol%)aqueous medium can be as high as 2.61 W m-1 K-1 and 1300%,respectively,around six times larger than highest value of the existed aqueous mediums.Meanwhile,3D-GS-CBF can be stable in the solution even after 6 months,addressing the instability issues of conventional graphene networks.A multiscale modeling including non-equilibrium molecular dynamics simulations and heat conduction model is applied to interpret experimental results.3D-GS-CBF aqueous medium can largely improve the solar vapor evaporation rate(by 1.5 times)that are even comparable to the interfacial heating system;meanwhile,its cooling performance is also superior to commercial coolant in thermal management applications. | Zheng Bo Chongyan Ying Huachao Yang Shenghao Wu Jinyuan Yang Jing Kong Shiling Yang Yanguang Zhou Jianhua Yan Kefa Cen | 2020 | Nano-Micro Letters2020，12，10： | 1 |
| 7 | Experimental study on failure characteristics of single-sided unloading rock under different intermediate principal stress conditions显示文摘Investigation of unloading rock failure under differentσ_(2)facilitates the control mechanism of excavation surrounding rock.This study focused on single-sided unloading tests of granite specimens under true triaxial conditions.The strength and failure characteristics were studied with micro-camera and acoustic emission(AE)monitoring.Furthermore,the choice of test path and the effect ofσ_(2)on fracture of unloading rock were discussed.Results show that the increasedσ_(2)can strengthen the stability of single-sided unloading rock.After unloading,the rock’s free surface underwent five phases,namely,inoculation,particle ejection,buckling rupture,stable failure,and unstable rockburst phases.Moreover,atσ_(2)≤30 MPa,the b value shows the following variation tendency:rising,dropping,significant fluctuation,and dropping,with dispersed damages signal.Atσ_(2)≥40 MPa,the tendency shows:a rise,a decrease,a slight fluctuation,and final drop,with concentrated damages signal.After unloading,AE energy is mainly concentrated in the micro-energy range.With the increasedσ_(2),the micro-energy ratio rises.In contrast,low,medium and large energy ratios drop gradually.The increased tensile fractures and decreased shear fractures indicate that the failure mode of the unloading rock gradually changes from tensile-shear mode to tensile-split one.The fractional dimension of the rock fragments first increases and then decreases with an inflection point at 20 MPa.The distribution of SIF on the planes changes asσ_(2)increases,resulting in strengthening and then weakening of the rock bearing capacity. | Chongyan Liu Guangming Zhao Wensong Xu Xiangrui Meng Zhixi Liu Xiang Cheng Gang Lin | 2023 | International Journal of Mining Science and Technology2023，33，3： | 0 |
| 8 | Ultrastructure and elemental composition of the eggshell of Reeve’s Pheasant(Syrmaticus reevesii)显示文摘The eggshell of Reeve’s pheasant(Syrmaticus reevesii)collected from the Dongzhai National Nature Reserve in Henan Province,China was studied.By using scanning electron microscopy and inductively coupled plasma(ICP)spectrometry,the ultrastructure and elemental composition of the eggshell was determined.The study showed that the average thickness of the surface layer of crys-tals,the palisade and cone layer,and the eggshell membrane were 20.8,220.8 and 62.5μm,respectively,accounting for 6.8%,72.6%and 20.6%of the total thickness of the eggshell.There were many vesicular holes in the palisade layer with an average diameter of 0.32±0.08μm(n=30).The function of these holes might be significant to air exchange.The shape of the eggshell pore on the surface layer of crystals is round or elliptical.The fracture surface of the pore is funnel-shaped.Some granules filled the upper part of the eggshell pores.The content of 21 elements in the eggshell of wild and captive Reeve’s pheasants was compared and presented.It indicated that among the elements that made up the eggshell of the wild pheasant,the content of Ca,Mg,P and S was much higher,ω>1 mg/g,withω(Ca)being higher than 40%of the eggshell.The contents of Na,Si,Sr,K and Al wereω=0.1-1 mg/g,while Fe,Zn,Pb,Mn,Cu,V and Ti had lower concentrations(ω=1-100μg/g).Theωof Ni,Cr,Co,Se,Cd were lower than 1μg/g.The elemental composition in the eggshell of the captive Reeve’s pheasant kept in the Dongzhai National Natural Reserve was significantly differ-ent from that of the wild species,with a difference of over 20%on S,Cu,Fe,Al,Mn,Si,Sr,Se and Cr.The lower intake of Fe,Mn,Si and Sr on the one hand and the higher intake of S,Cu,Al and Cr on the other hand might be responsible for the low fertility of captive Reeve’s pheasants in the Dongzhai National Nature Reserve.In order to ensure that the pheasants are receiving the proper amount of nutrition and to improve their breeding success,the amount of certain elements in the food should be adjusted. | CHANG Chongyan ZHANG Zhengwang CHEN Xiaoduan LIU Jinying SUN Quanhui | 2007 | Frontiers in Biology2007，2，3： | 0 |
| 9 | Cost-effective,environmentally-sustainable and scale-up synthesis of vertically oriented graphenes from waste oil and its supercapacitor applications显示文摘Vertically oriented graphenes(VGs)have attracted tremendous attention in a variety of energy storage-related applications.However,the high cost of preparing VGs significantly hinders their practical applications.Herein we introduce the Ar-plasma-enhanced chemical vapor deposition to demonstrate the cost-effective,environmentally-sustainable,and scale-up synthesis of VGs from waste oil.In our system,Ar gas can improve the electron energy and ionization rate of plasma,which breaks down the chemical bonding of waste oil into essential species to etch the amorphous carbon,yielding large-area VGs(12×3.5 cm^(2))with highly-oriented structure and superior growth efficiency beyond VGs from hydrocarbon precursors.In the supercapacitor applications,the VG-based electrode exhibits significantly enhanced capacitance(~4 times that from conventional hydrocarbon gases)and efficient AC(alternating current)filtering capability RC(resistor-capacitor)(time constant of of 163μs at 120 Hz),which is obviously superior to the non-oriented counterpart.Besides,MnO_(2)/VGs composite electrode is prepared to deliver a maximum energy density of~33.2 Wh/kg at 1.0 kW/kg and a power density of 10.2 kW/kg at 22.9 Wh/kg.In the end,the economic analysis suggests that the total cost of VGs can be reduced by~32%.This work provides an environment-friendly and low-cost avenue for preparing VGs for advanced energy storage applications. | Wenhao Kuang Huachao Yang Chongyan Ying Biyao Gong Jing Kong Xiangnan Cheng Zheng Bo | 2021 | Waste Disposal and Sustainable Energy2021，3，1： | 0 |
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