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A Revisit of Shape Editing Techniques:From the Geometric to the Neural Viewpoint

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Journal of Computer Science & Technology 2021年第3期36卷 520-554页

作者： yu-Jie yuan yu-kun Lai Tong Wu Lin Gao Ligang liu Beijing Key Laboratory of Mobile Computing and Pervasive Device Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Computer Science and Informatics Cardiff UniversityCardiff CF243AAU.K. School of Mathematical Sciences University of Science and Technology of ChinaHefei 230026China

3D shape editing is widely used in a range of applications such as movie production,computer games and computer aided *** is also a popular research topic in computer graphics and computer *** past decades,researchers have developed a series of editing methods to make the editing process faster,more robust,and more ***,the deformed shape is determined by the optimal transformation and weights for an energy *** increasing availability of 3D shapes on the Internet,data-driven methods were proposed to improve the editing *** recently as the deep neural networks became popular,many deep learning based editing methods have been developed in this field,which are naturally *** mainly survey recent research studies from the geometric viewpoint to those emerging neural deformation techniques and categorize them into organic shape editing methods and man-made model editing *** traditional methods and recent neural network based methods are reviewed.

关键词： mesh deformation man-made model editing deformation representation optimization deep learning

Dynamic Response of the U-Typed Sandwich Panel Under Explosion Load Based on the SDOF Method

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China Ocean Engineering 2022年第5期36卷 814-826页

作者： liu kun GAO yu ZHAO Chen-shui WANG Ze-ping School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China College of Shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China Qingdao Innovation and Development Center of Harbin Engineering University Qingdao 266000China

Sandwich panel is commonly used in ship and marine engineering equipment,such as side structure and superstructure deck of a ship,which is of good anti-explosion *** paper addresses a study on the dynamic response of the U-typed sandwich panel under explosion load through the numerical simulation and theoretical *** on the orthotropic plate theory,the U-typed sandwich panel is simplified and transformed into a single degree of freedom(SDOF)spring system,the equivalent motion equation of the SDOF system and the expression of triangular explosion load function are established based on the SDOF theory,and the maximum response spectrum of the SDOF system is ***,the response of the equivalent SDOF system of the U-typed sandwich panel under explosion load is analyzed,and the theoretical results match well with the numerical simulation results,which verifies the accuracy of the theoretical method proposed in this *** theoretical method proposed in this paper could have good engineering applications for the structural anti-explosion design,and provide a reference for the evaluation of the anti-explosion performance of ship and offshore platform structures.

关键词： U-typed sandwich panel the orthotropic plate theory oil and gas explosion SDOF method dynamic response

基于自适应续流比的混合式步进电机转矩脉动抑制方法

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陕西科技大学学报 2025年第1期43卷 142-151,202页

作者：王焜刘宝泉刘艺张浩铭刘俊陕西科技大学电气与控制工程学院陕西西安710021 西安西电高压开关有限责任公司陕西西安710018

混合式步进电机细分驱动存在较大的电流纹波,导致转矩脉动明显.通过分析H桥驱动电路的续流过程,提出一种基于自适应续流比的混合式步进电机转矩脉动抑制方法.该方法利用环型分配器产生的细分指令电流i ref与实际电流i相比较,以区分当前... 详细信息

混合式步进电机细分驱动存在较大的电流纹波,导致转矩脉动明显.通过分析H桥驱动电路的续流过程,提出一种基于自适应续流比的混合式步进电机转矩脉动抑制方法.该方法利用环型分配器产生的细分指令电流i ref与实际电流i相比较,以区分当前时刻所需的续流模式.在快速续流模式下,实时监测电流指令与实际电流的差值Δi ref,通过自适应系数k动态调节续流时间,直至电机相电流快速下降至给定电流i ref后切换至缓慢续流模式.对续流时长与快速续流占总续流时间的比例自适应调节以适应不同工况下步进电机的平稳运行,有效降低了转矩脉动.最后,搭建MATLAB/Simulink仿真平台并进行实验验证,结果表明,与传统混合续流控制相比,所提方法能够有效减小步进电机的转矩脉动.

关键词：混合式步进电机自适应续流比电流纹波转矩脉动

Role of processing parameters on relative density,microstructure and mechanical properties of selective laser melted titanium alloy

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China Foundry 2024年第6期21卷 676-684页

作者： Tian-yu liu Bo-liang liu Jiao-jiao Cheng Shi-bing liu kun Shi Hong-yu liu Jun Zhao National Key Laboratory of Advanced Casting Technologies Shenyang Research Institute of Foundry Co.Ltd.CAMShenyang 110022China

The relationships between the selective laser melting(SLM)processing parameters including laser power,scanning speed and hatch space,the relative density,the microstructure,and resulting mechanical properties of Ti-6Al-2Zr-1Mo-1V alloy were investigated in this *** result shows that laser power acts a dominant role in determining the relative density in comparison with scanning speed and hatch *** optimal SLM process window for fabricating relative density>99%samples is located in the energy density range of 34.72 J·mm^(-3)to 52.08 J·mm^(-3),where the laser power range is between 125 W and 175 *** upward trend is found in the micro-hardness as the energy density is *** optimum SLM processing parameters of Ti-6Al-2Zr-1Mo-1V alloy are:laser power of 150 W,scanning speed of 1,600 mm·s^(-1),hatch space of 0.08 mm,and layer thickness of 0.03 *** highest ultimate tensile strength,yield strength,and ductility under the optimum processing parameter are achieved,which are 1,205 MPa,1,099 MPa,and 8%,*** results of this study can be used to guide SLM production Ti-6Al-2Zr-1Mo-1V alloy parts.

关键词： selective laser melting processing parameter Ti-6Al-2Zr-1Mo-1V titanium alloy relative density microstructure mechanical properties

Removal and transformation of organic matters in domestic wastewater during lab-scale chemically enhanced primary treatment and a trickling filter treatment

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Journal of Environmental Sciences 2013年第1期25卷 59-68页

作者： Qingliang Zhao Huiyuan Zhong kun Wang Liangliang Wei Jinli liu yu liu State Key Laboratory of Urban Water Resources and Environments School of Municipal and Environmental EngineeringHarbin Institute of Technology School of Civil and Environmental Engineering Nanyang Technological University

To find a simple and economical way for treating the domestic wastewater irt small counties and towns, a process combining chemically enhanced primary treatment and a trickling filter （CEPT-TF, representing the physical and biological effects） was constructed and operated in laboratory conditions. The characteristic behaviors of dissolved organic matter in raw wastewater and effluents were examined during steady-state operation. Experimental results showed that the process of CEPT and TF in series was beneficial for the removal of hydrophobic and hydrophilic organics. Specially, the hydrophobic and aromatic materials could be preferentially removed in the CEPT unit, and the hydrophilic fraction in the TF. Structural changes of the organic fractions during the operation of the different units were also characterized via spectrum analysis.

关键词： dissolved organic matter fractionation fly ash coal cinder coagulation biodegradation

高空强爆炸X射线辐照铝靶板动响应的数值模拟

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爆炸与冲击 2025年第1期45卷 013102-1-013102-10页

作者：余润洲张昆汤文辉国防科技大学理学院湖南长沙410073

高空强爆炸所产生的X射线辐照至导弹壳体结构时产生的汽化反冲冲量（blow-off impulse，BOI）及热激波，能够引起目标的动响应破坏。现有的Whitener、BBAY和MBBAY理论模型仅能给出一维近似BOI值，无法处理复杂三维情况并给出对应的热激... 详细信息

高空强爆炸所产生的X射线辐照至导弹壳体结构时产生的汽化反冲冲量（blow-off impulse，BOI）及热激波，能够引起目标的动响应破坏。现有的Whitener、BBAY和MBBAY理论模型仅能给出一维近似BOI值，无法处理复杂三维情况并给出对应的热激波峰值压力p，因此，对该问题的研究非常依赖数值计算。利用X射线热激波数值计算程序TSHOCK3D对矩形铝靶板在0.1~3.0 keV范围的普朗克黑体温度和220~400 J/cm2辐射能通量下的汽化反冲冲量及峰值压力进行计算，并与理论模型作了对比分析。结果表明，TSHOCK3D程序可以得到可靠的结果，正辐照靶板中心处近似一维工况下的BOI与Whitener、BBAY和MBBAY三个理论模型下的BOI基本相符。通过单变量分析可得，靶板中BOI和峰值压力p均与入射能通量呈近似线性关系;而对于不同的黑体温度，BOI和峰值压力则在1.5~2.0 keV处存在极大值。

关键词： X射线汽化反冲冲量热激波 TSHOCK3D

High-dose dexamethasone regulates microglial polarization via the GR/JAK1/STAT3 signaling pathway after traumatic brain injury

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Neural Regeneration Research 2025年第9期20卷 2611-2623页

作者： Mengshi Yang Miao Bai yuan Zhuang Shenghua Lu Qianqian Ge Hao Li yu Deng Hongbin Wu Xiaojian Xu Fei Niu Xinlong Dong Bin Zhang Baiyun liu Beijing Tiantan Hospital Capital Medical UniversityBeijingChina Department of Neurology The First Hospital of Tsinghua UniversityBeijingChina Department of Neurotrauma and Beijing Key Laboratory of Central Nervous System Injury Beijing Neurosurgical InstituteCapital Medical UniversityBeijingChina Department of Critical Care Medicine Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Center for Nerve Injury and Repair Beijing Institute of Brain DisordersChina National Clinical Research Center for Neurological DiseasesBeijingChina

Although microglial polarization and neuroinflammation are crucial cellular responses after traumatic brain injury,the fundamental regulatory and functional mechanisms remain insufficiently *** potent anti-inflammato ry agents,the use of glucoco rticoids in traumatic brain injury is still controversial,and their regulatory effects on microglial polarization are not yet *** the present study,we sought to determine whether exacerbation of traumatic brain injury caused by high-dose dexamethasone is related to its regulatory effects on microglial polarization and its mechanisms of *** vitro cultured BV2 cells and primary microglia and a controlled cortical impact mouse model were used to investigate the effects of dexamethasone on microglial ***,dexamethasone,RU486(a glucocorticoid receptor antagonist),and ruxolitinib(a Janus kinase 1 antagonist)were ***-sequencing data obtained from a C57BL/6 mouse model of traumatic brain injury were used to identify potential targets of *** Morris water maze,quantitative reverse transcription-polymerase chain reaction,western blotting,immunofluorescence and confocal microscopy analysis,and TUNEL,Nissl,and Golgi staining were performed to investigate our ***-throughput sequencing results showed that arginase 1,a marker of M2 microglia,was significantly downregulated in the dexamethasone group compared with the traumatic brain injury group at3 days post-traumatic brain *** dexamethasone inhibited M1 and M2 microglia,with a more pronounced inhibitory effect on M2microglia in vitro and in *** receptor plays an indispensable role in microglial polarization after dexamethasone treatment following traumatic brain ***,glucocorticoid receptor activation increased the number of apoptotic cells and neuronal death,and also decreased the density of dendritic spines.A possible downstream receptor signaling mechanism is th

关键词： apoptosis BV2 microglia dexamethasone glucocorticoid receptor glucocorticoids innate immune system microglial polarization neuroinflammation primary microglia traumatic brain injury

Solar trough receiver with V-grooved light traps for efficiency improvement

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Science China Technological Sciences 2025年第1期 146-156页

作者： Bin liu Qing LI yu QIU School of Energy Science and Engineering Central South University

Parabolic trough collector is a promising technology for both domestic and industrial heat supplies. To enhance the collector efficiency, a modified trough receiver with dozens of V-grooved light traps incorporated into its lower-half absorber was introduced. For assessing the performance of this receiver, a solar-thermal-stress coupled model was established. Using this model, firstly, the effects of the V-grooved light traps were investigated. The results reveal that, compared to the conventional trough receiver, the modified trough receivers equipped with different traps can reduce their optical losses by 81.9–138.0 Wm-1（i.e., 15.0%–25.2%）, improving their optical efficiencies by 1.60%–2.69%. However, these traps also result in increased thermal loss from the receiver. Therefore, there is no single optimal modified trough receiver that consistently outperforms all other receivers across all possible conditions. Nonetheless, the MTR30-3 and MTR60-3 receivers emerge as the optimized choices due to their better solar-thermal performance. Subsequently, performance evaluation reveals that the two optimized receivers can enhance the receiver efficiencies within the typical solar irradiance range by 0.02%–2.65% and 0.05%–1.70% when the inlet fluid temperatures are below 488 and 523 K, respectively. Consequently, the collector efficiencies can be improved by 0.02%–2.49% and 0.05%–1.60%, respectively. Additionally, thermal stress analysis verifies that the two optimized receivers remain within safe limits under all typical conditions. Given that the heating temperature of a typical solar collector for domestic or industrial heat supply is typically below 523 K, the integration of the two optimized receivers has the capability to effectively enhance the overall collector efficiency.

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Two-dimensional metallic tantalum ditelluride with an intrinsic basal-plane activity for oxygen reduction:A microkinetic modeling study

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Green Energy & Environment 2022年第3期7卷 525-532页

作者： yu Wang kun Zhou Environmental Process Modelling Centre Nanyang Environment and Water Research InstituteNanyang Technological University1 CleanTech Loop637141Singapore School of Mechanical and Aerospace Engineering Nanyang Technological University50 Nanyang Avenue639798Singapore

Two-dimensional(2D) materials have exhibited great potential for replacing costly Pt for oxygen reduction reaction(ORR) because of their distinctive structural features and high pre-site ***,their performance is generally hindered by the limited density of active sites(e.g.,at the layer edges).Although they feature a high exposure of surface sites,these sites are typically inert for ***,through density functional theory calculations,we propose a promising ORR catalyst candidate,a 2D TaTe_(2) nanosheet,which has an intrinsic high basal-plane *** of the thermodynamic and kinetic processes are explored,which demonstrates that the basal-plane Te sites of the TaTe_(2) nanosheet have great potential for facilitating ***,we construct a microkinetic model of ORR proceeding on TaTe_(2),which unveils its dynamic intermediate coverage under different electrode potentials and identifies the dominating associative *** theoretical half-wave potential of TaTe_(2) is predicted to be 0.87 V,which exceeds those of the well-established Pt(111) and Fe–N–C single-atom catalysts computed at the same *** study not only presents the first 2D,non-Pt ORR catalyst candidate with an intrinsic basal-plane activity but also offers a rational methodology for unveiling the mechanism/activity of ORR and other electrochemical reactions.

关键词： plane intrinsic kinetic