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Science China Chemistry 2024年第7期67卷 2282-2291页

作者： Meichen Jiao Chunmin Jia hao xu Peng Wu Xian-Ming Zhang School of Chemistry&Material Science Shanxi Normal UniversityTaiyuan 030006China Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China School of Chemistry Taiyuan University of TechnologyTaiyuan 030024China

Ge-containing Lewis acidic zeolites are typically synthesized using a conventional hydrothermal strategy from amorphous silica sources,through a long time-and energy-consuming approach limiting their wide *** study reports a rapid synthesis strategy for a series of IWV aluminogermanosilicate zeolites(T-x-Al)with a wide range of Si/Ge molar ratios(5–15)by interzeolite transformation of dealuminated FAU(DA-FAU).Notably,Ge-rich IWV could be obtained with crystallization time as short as one day by the equimolecular Si/Ge ratio *** effect of synthetic parameters was investigated and the obtained T-x-Al samples were characterized by XRD,SEM,EDS,ICP,^(29)Si and^(27)Al MAS NMR,FTIR,and N_(2)physisorption *** with a previously reported IWV germanosilicate(H-3),T-x-Al displayed a better catalytic activity in Baeyer-Villiger(BV)oxidation,attributed to the presence of the active framework Ge sites with the assistance of the extraframework Al *** cyclic catalysis tests revealed that the presence of framework Al species contributed to the stability of the ***,T-x-Al,with 14-membered ring(MR)supercages,outperformed the typical 12-MR Sn-beta catalyst in the BV oxidation of large ketone-like 2-admantanone,indicating a promising potential application in the macromolecular catalytic process.

关键词： Ge-rich IWV interzeolite transformation Al assistance Baeyer-Villiger oxidation

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Multi-bond Network Hydrogels with Robust Mechanical and Self-healable Properties

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Chinese Journal of Polymer Science 2017年第10期35卷 1253-1267页

作者： xiao-ying liu ming zhong fu-kuan shi hao xu 谢续明 Laboratory of Advanced Materials (Ministry of Education) Department of Chemical Engineering Tsinghua University Beijing 100084 China

Multi-bond network（MBN） which contains a single network with hierarchical cross-links is a suggested way to fabricate robust hydrogels. In order to reveal the roles of different cross-links with hierarchical bond energy in the MBN, here we fabricate poly（acrylic acid） physical hydrogels with dual bond network composed of ionic cross-links between carboxylFe3＋ interactions and hydrogen bonds, and compare these dually cross-linked hydrogels with singly and ternarily cross-linked hydrogels. Simple models are employed to predict the tensile property, and the results confirm that the multi-bond network with hierarchical distribution in the bond energy of cross-links endows hydrogel with effective energy-dissipating mechanism. Moreover, the dually cross-linked MBN gels exhibit excellent mechanical properties（tensile strength up to 500 k Pa, elongation at break ~ 2400%） and complete self-healing after being kept at 50 °C for 48 h. The factors on promoting self-healing are deeply explored and the dynamic multi-bonds are regarded to trigger the self-healing along with the mutual diffusion of long polymer chains and ferric ions.

关键词： responsive Janus PNIPAM irradiation polymerization hence hydrogel heating linking colorful

Optimize Evacuation Route Considering the Operational Cost as a Constraint

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International Journal of Transportation Science and Technology 2013年第1期2卷 65-78页

作者： hao xu Hongchao Liu Department of Civil&Environmental Engineering Texas Tech UniversityLubbockTX 79409

Evacuation planning involves modeling,operation,and management of evacuation routes before and during emergency *** paper presents the development and examination of a route optimization model which considers the operational cost as a *** study is focused on the situation when the backbone evacuation route,usually the interstate highway system,is over congested and some traffic need to be directed to local street *** intersections are the key control components of a street network,traffic operations at intersections cannot be neglected in route *** order to consider the operational cost in the modeling process,a street network is first presented by an extended graph network which has cost information associated with each ***,a system optimal traffic assignment approach is used to select and optimize the evacuation *** property of the approach is examined by a numerical test which includes a network composed of a backbone interstate highway and a grid network with over 30 intersections.

关键词： network intersection backbone

Research on extraction and reproduction of deformation camouflage spot based on generative adversarial network model

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Defence Technology（防务技术） 2020年第3期16卷 555-563页

作者： Xin Yang Wei-dong xu Qi Jia Ling Li Wan-nian Zhu Ji-yao Tian hao xu National Key Laboratory of Lightning Protection and Electromagnetic Camouflage Amy Engineering UniversityNanjingJiangsu210007China Teaching and Research Office of Camouflage in Training Center Army Engineering UniversityXuzhouJiangsu221004China

The method of describing deformation camouflage spots based on feature space has some shortcomings,such as inaccurate description and difficult *** on the strong fitting ability of the generative adversarial network model,the distribution of deformation camouflage spot pattern can be directly fitted,thus simplifying the process of spot extraction and *** requirements of background spot extraction are analyzed *** calculation formula of limiting the range of image spot pixels is given and two kinds of spot data sets,forestland and snowfield,are *** feature is decomposed into shape,size and color features,and a GAN(Generative Adversarial Network)framework is *** effects of different loss functions on network training results are analyzed in the *** the meantime,when the input dimension of generator network is 128,the balance between sample diversity and quality can be *** effects of sample generation are investigated in two ***,the probability of the generated spots being distinguished in the background is counted,and the results are all less than 20% and mostly close to ***,the features of the spot shape are calculated and the independent sample T-test is applied to verify that the features are from the same distribution,and all the P-Values are much higher than *** subjective and objective methods prove that the spots generated by this method are similar to the background *** proposed method can directly generate the desired camouflage pattern spots,which provides a new technical method for the deformation camouflage pattern design and camouflage effect evaluation.

关键词： Deformation camouflage Generative adversarial network Spot feature Shape description

A crosstalk-free dual-mode sweat sensing system for naked-eye sweat loss quantification via changes in structural reflectance

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Bio-Design and Manufacturing 2024年第4期7卷 428-438页

作者： Bowen Zhong hao xu Xiaokun Qin Lingchen Liu Hailong Wang Lili Wang State Key Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronic Engineering University of Chinese Academy of SciencesBeijing 100049China

Sweat loss monitoring is important for understanding the body’s thermoregulation and hydration status,as well as for comprehensive sweat *** recent advances,developing a low-cost,scalable,and universal method for the fabrication of colorimetric microfluidics designed for sweat loss monitoring remains *** this study,we propose a novel laserengraved surface roughening strategy for various flexible *** process permits the construction of microchannels that show distinct structural reflectance changes before and after sweat *** leveraging these unique optical properties,we have developed a fully laser-engraved microfluidic device for the quantification of naked-eye sweat *** sweat loss sensor is capable of a volume resolution of 0.5µL and a total volume capacity of 11µL,and can be customized to meet different performance ***,we report the development of a crosstalk-free dual-mode sweat microfluidic system that integrates an Ag/AgCl chloride sensor and a matching wireless measurement flexible printed circuit *** integrated system enables the real-time monitoring of colorimetric sweat loss signals and potential ion concentration signals without ***,we demonstrate the potential practical use of this microfluidic sweat loss sensor and its integrated system for sports medicine via on-body studies.

关键词： Sweat loss sensor Microfluidic design Structural reflectance Dual-mode integration Crosstalk-free

Relationship between β→α dynamic transformation and dynamic recrystallization under thermomechanical coupling in Ti-5Al-5Mo-5V-1Cr-1Fe alloy

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Journal of Materials Science & Technology 2024年第12期179卷 98-113页

作者： Yue Dong Xingang Liu hao xu Yini He Yujiao Ke Wenwen Zhang College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China

The thermal simulation compression tests of near-β titanium alloy Ti-5Al-5Mo-5V-1Cr-1Fe were per-formed within the range of deformation temperatures of 710-860 ℃ and strain rates of 0.001-1 s^(-1).Based on electron backscatter diffraction(EBSD)characterization and analysis technology,the inter-action between dynamic phase transformation(DPT)of β-to-α and dynamic recrystallization(DRX)under thermal-mechanical coupling is deeply and systematically *** clarify the effects of temperatures and strain rates on the orientation relationship during dynamic precipitation of α-phase within β grain interiors possessing special *** results show that the intragranular α-phase precipitated on the subgrain boundaries near {001}β with a high degree of dynamic recovery(DRV)deviates more from Burgers Orientation Relationship(BOR)than the α-phase that precipitates near{111}βas temperature *** proportion of α-phase precipitated by strain-induced on β recrys-tallized equiaxed grains for the deviating angle from BOR(θBoR)in the range of 20°-30° increases to 40%with the increase of strain rates below 800 ℃.In addition,the α-phase is dynamically precipitated on the grain boundaries with {110}β orientation,which undergoes continuous dynamic recrystallization(CDRX),exhibiting epitaxial recrystallization,namely {110}β//{0001 }α.Furthermore,the morphology of grain boundaries α phase(αGBs)precipitated by strain-induced phase transformation(SIPT)on specific types of β grain boundaries(βGBs),as well as the crystallographic orientation relationship and variant selection effect between adjacent α-variant within β grains are *** orientation relationships between α variants in {111}β grain are related with each other by 50°-60°/and 60°-70°/***"necklace"αGBs of recrystallization exhibit mainly the rotation of 50°-70° around thezone axis,while the adjacent α-variant in the grain interiors is mainly 60° or 90°/.In summary,the

关键词： Ti-55511 alloy Dynamic transformation Dynamic recrystallization Strain-induced phase transformation Burgers orientation relationship

Mash1 efficiently reprograms rat astrocytes into neurons

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Neural Regeneration Research 2014年第1期9卷 25-32页

作者： Daofang Ding Leqin xu hao xu Xiaofeng Li Qianqian Liang Yongjian Zhao Yongjun Wang Institute of Spine Shanghai University of Traditional Chinese Medicine Longhua Hospital Shanghai University of Traditional Chinese Medicine

To date, it remains poorly understood whether astrocytes can be easily reprogrammed into neurons. Mashl and Brn2 have been previously shown to cooperate to reprogram fibroblasts into neurons. In this study, we examined astrocytes from 2-month-old Sprague-Dawley rats, and found that Brn2 was expressed, but Mashl was not detectable. Thus, we hypothesized that Mashl alone could be used to reprogram astrocytes into neurons. We transfected a recombinant MSCV-MASH1 plasmid into astrocytes for 72 hours, and saw that all cells expressed Mashl. One week later, we observed the changes in morphology of astrocytes, which showed typical neuro- nal characteristics. Moreover, β-tubulin expression levels were significantly higher in astrocytes expressing Mashl than in control cells. These results indicate that Mashl alone can reprogram astrocytes into neurons.

关键词： nerve regeneration Mash-l Brn2 β-tubulin reprogram plasmid retrovirus astrocytes neurons the National Basic Research Program of China (973 Program) neural regeneration

IOPS:computational graph optimization based on inter-operators parallel scheduling

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High Technology Letters 2023年第1期29卷 50-59页

作者：谢晓燕 xu hao ZHU Yun HE Wanqi School of Computer Xi’an University of Posts and TelecommunicationsXi’an 710121P.R.China School of Electronic Engineering Xi’an University of Posts and TelecommunicationsXi’an 710121P.R.China

To improve the inference efficiency of convolutional neural networks(CNN),the existing neural networks mainly adopt heuristic and dynamic programming algorithms to realize parallel scheduling among *** scheduling algorithms can generate local optima easily,while the dynamic programming algorithm has a long convergence time for complex structural *** paper mainly studies the parallel scheduling between operators and proposes an inter-operator parallelism schedule(IOPS)scheduling algorithm that guarantees the minimum similar execution ***,a graph partitioning algorithm based on the largest block is designed to split the neural network model into multiple ***,the operators that meet the conditions is replaced according to the defined operator replacement ***,the optimal scheduling method based on backtracking is used to schedule the computational *** models such as Inception-v3,ResNet-50,and RandWire are selected for *** experimental results show that the algorithm designed in this paper can achieve a 1.6×speedup compared with the existing sequential execution methods.

关键词： compile optimization convolutional neural network(CNN) inter-operator parallelism schedule(IOPS) operator replacement

Monitoring of Real-Time Complex Deformed Shapes of Thin-Walled Channel Beam Structures Subject to the Coupling Between Bi-Axial Bending and Warping Torsion

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Structural Durability & Health Monitoring 2019年第3期13卷 267-287页

作者： Rui Lu Zhanjun Wu Qi Zhou hao xu School of Aeronautics and Astronautics Faculty of Vehicle Engineering and MechanicsState Key Laboratory of Structural Analysis for Industrial EquipmentDalian University of TechnologyDalian116024China

Structural health monitoring(SHM)is a research focus involving a large category of techniques performing in-situ identification of structural damage,stress,external loads,vibration signatures,*** various SHM techniques,those able to monitoring structural deformed shapes are considered as an important category.A novel method of deformed shape reconstruction for thinwalled beam structures was recently proposed by xu et al.[1],which is capable of decoupling complex beam deformations subject to the combination of different loading cases,including tension/compression,bending and warping torsion,and also able to reconstruct the full-field displacement ***,this method was demonstrated only under a relatively simple loading coupling cases,involving uni-axial bending and warping *** effectiveness of the method under more complex loading cases needs to be thoroughly *** this study,more complex deformations under the coupling between bi-axial bending and warping torsion was decoupled using the *** set of equations for deformation decoupling was established,and the reconstruction algorithm for bending and torsion deformation were *** effectiveness and accuracy of the method was examined using a thin-walled channel beam,relying on analysis results of finite element analysis(FEA).In the analysis,the influence of the positions of the measurement of surface strain distributions on the reconstruction accuracy was ***,different levels of measurement noise were added to the axial strain values based on numerical method,and the noise resistance ability of the deformation reconstruction method was investigated *** to the FEA results,the effectiveness and precision of the method in complex deformation decoupling and reconstruction were ***,the immunity of the method to measurement noise was proven to be considerably strong.

关键词： Structural health monitoring deformation reconstruction finite element analysis strain measurement channel section beam

Influence of tectonic uplift-erosion on formation pressure

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Petroleum Science 2010年第4期7卷 477-484页

作者： xu hao Zhang Junfeng Jia Chengzao Tang Dazhen Yin Wei School of Energy Resources Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism China University of Geosciences Beijing 100083 China PetroChina Exploration and Production Company Beijing 100007 China PetroChina Co. Ltd. Beijing 100007 China Research Institute of Petroleum Exploration and Development Beijing 100083 China

The formation of abnormally low-pressure hydrocarbon reservoirs in petroliferous basins has a close relationship with tectonic uplift and the consequent erosion. In order to understand abnormally low-pressure reservoirs and to provide a scientific basis for exploration and development, we established, through numerical simulation and theoretical analysis, a set of equations for the formation pressure in a closed system influenced by uplift-erosion, discussed the relationship between the genesis of abnormal pressure and uplift-erosion, and put forward the concept of balance pressure （P b ）. The results showed that abnormally high pressure coefficient may form when the current formation pressure was higher than P b , and abnormally low pressure may form when the current formation pressure was lower than P b . In the Santanghu Basin, the current formation pressure of abnormally low pressure reservoirs is lower than P b , so tectonic uplift-erosion leads to the decrease of the pressure coefficient. There is a positive correlation between the pressure drop caused by the decrease of fluid temperature and the rebound of rock porosity and strata erosion. Calculation results indicated that the reservoir pressure of Jurassic strata in the Santanghu Basin was decreased by 11.6-17.1 MPa due to tectonic uplift-erosion during the Late Yanshanian period.

关键词： Uplift-erosion formation pressure temperature decrease porosity rebound abnormally low pressure Santanghu Basin