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Theoretical and experimental study on the vertical-variabledoping superjunction MOSFET with optimized process window 认领 引用
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作者 Min Ren Meng Pi +6 位作者 Rongyao Ma Xin Zhang Ziyi Zhou Qingying Lei Lvqiang Li Zehong Li Bo Zhang 《Journal of Semiconductors》 EI CAS CSCD 2025年第6期97-104,共8页
As a type of charge-balanced power device,the performance of super-junction MOSFETs(SJ-MOS)is significantly influ-enced by fluctuations in the fabrication process.To overcome the relatively narrow process window of co... As a type of charge-balanced power device,the performance of super-junction MOSFETs(SJ-MOS)is significantly influ-enced by fluctuations in the fabrication process.To overcome the relatively narrow process window of conventional SJ-MOS,an optimized structure"vertical variable doping super-junction MOSFET(VVD-SJ)"is proposed.Based on the analysis using the charge superposition principle,it is observed that the VVD-SJ,in which the impurity concentration of the P-pillar gradually decreases while that of the N-pillar increases from top to bottom,improves the electric field distribution and mitigates charge imbalance(CIB).Experimental results demonstrate that the optimized 600 V VVD-SJ achieves a 35.90%expansion of the pro-cess window. 展开更多
关键词 super-junction charge imbalance process window breakdown voltage(BV) unclamped inductive switching(UIS)
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Process window diagram of conical cups in hydrodynamic deep drawing assisted by radial pressure 认领 引用 被引量：8
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作者 Abbas HASHEMI Mohammad HOSEINPOUR GOLLO S.M.Hossein SEYEDKASHI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第9期3064-3071,共8页
Major defects in forming of conical cups are wrinkles and rupture.Hydrodynamic deep drawing assisted by radial pressure（HDDRP） is a sheet hydroforming process for production of shell cups in one step.In this work,pr... Major defects in forming of conical cups are wrinkles and rupture.Hydrodynamic deep drawing assisted by radial pressure（HDDRP） is a sheet hydroforming process for production of shell cups in one step.In this work,process window diagrams（PWDs） for Al1050-O,pure copper and DIN 1623 St14 steel are obtained for HDDRP process.The PWD is determined to provide a quick assessment of part producibility for sheet hydroforming process.Finite element method is used for this purpose considering the process parameters including pressure path,and the blank material and its thickness.Numerical results are validated by experiments.It is shown that the sheets with less initial thickness and higher strength show better formability and uniformity of thickness distribution on final product.The results demonstrate that the obtained PWD can predict appropriate forming area and probability of rupture or wrinkling occurrence under different pressure loading paths. 展开更多
关键词 conical cups hydrodynamic deep drawing finite element simulation process window diagram
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Principle and Process Window of Cerium Dioxide Thin Film Fabrication with Dual Plasma Deposition 认领 引用 被引量：1
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作者 L.P. Wang B. Y Tang +2 位作者 X.B. Tian YX.Leng Q. YZhang and P.K.Chu Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China 《Journal of Materials Science & Technology》 SCIE EI CAS 2001年第1期29-30,共2页
Cerium dioxide, CeO2, is a potentially superior material in a myriad of areas, and many methods have been proposed to deposit single crystal CeO2 thin films. A novel fabrication technique utilizing dual plasma generat... Cerium dioxide, CeO2, is a potentially superior material in a myriad of areas, and many methods have been proposed to deposit single crystal CeO2 thin films. A novel fabrication technique utilizing dual plasma generated by metal vacuum arc (MEVVA) and radio frequency (RF) is discussed in this paper. We have recently conducted a systematic investigation to determine the optimal process window to deposit CeO2 thin films'on Si(100) substrates. The X-ray diffraction results show the existence of CeO2(100) in the as-deposited sample. 展开更多
关键词 Thin Window Principle and Process Window of Cerium Dioxide Thin Film Fabrication with Dual Plasma Deposition
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Optimization of Aluminum Alloy Formation Process for Selective Laser Melting Using a Differential Evolution-Framed JAYA Algorithm 认领 引用
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作者 Siwen Xu Hanning Chen +3 位作者 Rui Ni Maowei He Zhaodi Ge Xiaodan Liang 《Computers, Materials & Continua》 SCIE EI 2026年第2期420-444,共25页
Selective Laser Melting(SLM),an advanced metal additive manufacturing technology,offers high precision and personalized customization advantages.However,selecting reasonable SLM parameters is challenging due to comple... Selective Laser Melting(SLM),an advanced metal additive manufacturing technology,offers high precision and personalized customization advantages.However,selecting reasonable SLM parameters is challenging due to complex relationships.This study proposes a method for identifying the optimal process window by combining the simulation model with an optimization algorithm.JAYA is guided by the principle of preferential behavior towards best solutions and avoidance of worst ones,but it is prone to premature convergence thus leading to insufficient global search.To overcome limitations,this research proposes a Differential Evolution-framed JAYA algorithm(DEJAYA).DEJAYA incorporates four key enhancements to improve the flexibility of the original algorithm,which include DE framework design,horizontal crossover operator,longitudinal crossover operator,and global greedy strategy.The effectiveness of DEJAYA is rigorously evaluated by a suite of 23 distinct benchmark functions.Furthermore,the numerical simulation establishes AlSi10Mg single-track formation models,and DEJAYA successfully identified the optimal process window for this problem.Experimental results validate that DEJAYA effectively guides SLM parameter selection for AlSi10Mg. 展开更多
关键词 Selective laser melting differential evolution-framed JAYA meta-heuristic algorithm AlSi10Mg singletrack formation optimal process window
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Identification of processing window for extrusion of large thick-walled Inconel 625 alloy pipes using response surface methodology 认领 引用 被引量：10
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作者 郭良刚 党利 +2 位作者 杨合 张君 郑文达 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第7期1902-1911,共10页
Identifying suitable processing window is necessary but difficult for achieving favorable microstructure and performance in extrusion of large thick-walled pipe with difficult-to-deform Inconel 625 alloy. In this work... Identifying suitable processing window is necessary but difficult for achieving favorable microstructure and performance in extrusion of large thick-walled pipe with difficult-to-deform Inconel 625 alloy. In this work, a method was established for identifying the extrusion process window considering temperature control using response surface methodology. Firstly, the response surface models, which correlate temperature rise and peak temperature to key extrusion parameters, have been developed by orthogonal regression based on finite element calculated data. Secondly, the coupled effects of the key extrusion parameters on the temperature rise and peak temperature have been disclosed based on the regression models. Lastly, suitable extrusion processing windows, which are described by contour map of peak temperature in the space of extrusion speed and initial billet temperature, have been established for different extrusion ratios. Using the identified process window, a suitable combination of the key extrusion parameters can be determined conveniently and quickly. 展开更多
关键词 profile extrusion processing window response surface methodology difficult-to-deform materials finite element simulation
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Heterostructured crystallization mechanism and its effect on enlarging the processing window of Fe-based nanocrystalline alloys 认领 引用 被引量：2
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作者 Tao Liu Aina He +6 位作者 Fengyu Kong Anding Wang Yaqiang Dong Hua Zhang Xinmin Wang Hongwei Ni Yong Yang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2021年第9期53-60,共8页
The harsh melt-spinning and annealing processes of high saturation magnetization nanocrystalline softmagnetic alloys are the biggest obstacles for their industrialization. Here, we proposed a novel strategy to enlarge... The harsh melt-spinning and annealing processes of high saturation magnetization nanocrystalline softmagnetic alloys are the biggest obstacles for their industrialization. Here, we proposed a novel strategy to enlarge the processing window by annealing the partially crystallized precursor ribbons via a heterostructured crystallization process. The heterostructured evolution of Fe84.75Si2B9P3C0.5Cu0.75(at.%)alloy ribbons with different spinning rate were studied in detail, to demonstrate the gradient nucleation and grain refinement mechanisms. The nanocrystalline alloys made with industrially acceptable spinning rate of 25-30 m/s and normal annealing process exhibit excellent magnetic properties and fine nanostructure. The small quenched-in crystals/clusters in the free surface of the low spinning rate ribbons will not grow to coarse grains, because of the competitive grain growth and shielding effect of metalloid elements rich interlayer with a high stability. Avoiding the precipitation of quenched-in coarse grains in precursor ribbons is thus a new criterion for the composition and process design, which is more convenient than the former one with respect to the homogenous crystallization mechanism, and enable us to produce high performance nanocrystalline soft-magnetic alloys. This strategy is also suitable for improving the compositional adjustability, impurity tolerance, and enlarging the window of melt temperature,which is an important reference for the future development of composition and process. 展开更多
关键词 Nanocrystalline alloy Processing window Surface crystallization Soft-magnetic property Heterostructured crystallization
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Development of processing windows for friction stir spot welding of aluminium Al5052/copper C27200 dissimilar materials 认领 引用 被引量：1
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作者 S. SIDDHARTH T.SENTHILKUMAR M.CHANDRASEKAR 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第6期1273-1284,共12页
Friction stir spot welding technique was used to join dissimilar combinations of aluminium alloy(Al5052)with copperalloy(C27200)and friction stir spot welding windows such as tool rotational speed–dwell time and tool... Friction stir spot welding technique was used to join dissimilar combinations of aluminium alloy(Al5052)with copperalloy(C27200)and friction stir spot welding windows such as tool rotational speed–dwell time and tool rotational speed?plungedepth diagrams for effective joining of these materials were developed.Using a central composite design model,empirical relationswere developed to predict the changes in tensile shear failure load values and interface hardness of the joints with three processparameters such as tool rotational speed,plunge depth and dwell time.The adequacy of the developed model was verified usingANOVA analysis at95%confidence level.Response surface methodology was used to optimize the developed model to maximizetensile strength and minimize interface hardness.A high tensile shear failure load value of3850N and low interface hardness valueof HV81was observed for joints made under optimum conditions,and validation experiments confirmed the high predictability ofthe developed model with error less than2%.The operating windows developed shall act as reference maps for future designengineers in choosing appropriate friction stir spot welding process parameter values to obtain good joints. 展开更多
关键词 friction stir spot welding dissimilar materials aluminium copper processing windows response surface methodology
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棉针织物黑曲霉黑色素染色及紫外线防护性能研究 认领 引用
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作者 徐进 黎骐榕 +1 位作者 郭佳旭 袁久刚 《针织工业》 北大核心 2026年第7期84-89,共6页
针对针织染整的绿色替代需求,文中以生物发酵获得的黑曲霉黑色素为着色源,构建纤维表面化学调控-上色-固着的流程,并系统评估染液稳定性、上染动力学、色牢度与紫外线防护性能。结果表明,黑色素在碱性介质中具有良好的稀释与热稳定性,pH... 针对针织染整的绿色替代需求,文中以生物发酵获得的黑曲霉黑色素为着色源,构建纤维表面化学调控-上色-固着的流程,并系统评估染液稳定性、上染动力学、色牢度与紫外线防护性能。结果表明,黑色素在碱性介质中具有良好的稀释与热稳定性,pH值<10.0时,易发生酸化析出;经表面化学调控后,在80℃等温条件下,上染曲线约15 min后趋缓,30 min时上染率为77.12%;正交试验确定最佳工艺为调控组分25.0 g/L、pH值调节剂3.5 g/L、80℃、20 min附近;该条件下织物色深较高且顶破强力基本保持不变;采用无金属固色剂并配合酸回调,耐皂洗色牢度与干摩达4~5级,湿摩约3级;耐光色牢度仍偏低(1~2级),成品UPF值显著提升并达到50+。 展开更多
关键词 微生物黑色素 棉针织物 上染动力学 色牢度 紫外线防护 工艺窗口
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Additive engineering to broaden the processing window of two-stepprocessed perovskite solar cells 认领 引用
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作者 Jiangying Lu Keqian Dong +11 位作者 Kuankuan Ren Shan Wu Xu Zheng Yulin Wu Wei Jiang Yipeng Xu Shudi Lu Kong Liu Zhijie Wang Shizhong Yue Liya Zhou Shengchun Qu 《Nano Research Energy》 EI CSCD 2026年第1期191-199,共9页
A processing window exists during the transition between film formation and the annealing step in the two-step method employed for the fabrication of FAPbI3 perovskite solar cells,independent of whether the aim is to ... A processing window exists during the transition between film formation and the annealing step in the two-step method employed for the fabrication of FAPbI3 perovskite solar cells,independent of whether the aim is to produce a batch of small-area or large-area devices.A significant variance in the power conversion efficiencies of perovskite devices,resulting from different processing windows,leads to a marked decrease in device reproducibility.To investigate the changes occurring within the perovskite wet film during the processing window,this study utilized nitrogen protection packaging technology to monitor the crystallization process of the perovskite wet film outside the glove box.The observation indicated non-uniform intermediate-phase reaction rates.The incorporation of 3-cyanopyridine into the two-step method decelerated the crystallization kinetics of the perovskite wet film,suppressing the formation ofδ-FAPbI3.Such modification expanded the processing window time,enabling the preparation of perovskite films with superior crystallinity and minimal defects.The n-i-p type perovskite solar cells exhibited a power conversion efficiency(PCE)of 25.12%.The findings demonstrate that this modification method effectively extends the processing window time of the two-step method,leading to the fabrication of perovskite devices with optimal performance and high repeatability.This represents a novel strategy for the batch production of perovskite devices and the manufacturing of large-area perovskite films. 展开更多
关键词 two-step-processed perovskite solar cell processing window reproducible performance
Processing map of as-cast 7075 aluminum alloy for hot working 认领 引用 被引量：14
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作者 Guo Lianggang Yang Shuang +1 位作者 Yang He Zhang Jun 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2015年第6期1774-1783,共10页
The true stress-strain curves of as-cast 7075 aluminum alloy have been obtained by isothermal compression tests at temperatures of 300 500 ~C and strain rates of 0.01 10 s i. The plastic flow instability map is establ... The true stress-strain curves of as-cast 7075 aluminum alloy have been obtained by isothermal compression tests at temperatures of 300 500 ~C and strain rates of 0.01 10 s i. The plastic flow instability map is established based on Gegel B and Murthy instability criteria because the deformed compression samples suggest that the combination of the above two instability criteria has more comprehensive crack prediction ability. And the processing map based on Dynamic Mate- rial Model （DMM） of as-cast 7075 aluminum alloy has been developed through a superposition of the established instability map and power dissipation map. In terms of microstructure of the deformed samples and whether plastic flow is stable or not, the processing map can be divided into five areas： stable area with as-cast grain, stable area with homogeneous grain resulting from dynamic recovery, instability area with as-cast grain, instability area with the second phase and instability area with mixed grains. In consideration of microstructure characteristics in the above five areas of the processing map, the stable area with homogeneous grain resulting from dynamic recovery, namely the temperatures at 425465 ℃ and the strain rates at 0.01^-1 s^-1, is suggested to be suitable processing window for the as-cast 7075 aluminum alloy. 展开更多
关键词 As-cast 7075 aluminum alloy Hot compression test Hot working Processing map Processing window
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工艺参数对LDED成形热作模具钢熔池形貌及成形质量的影响 认领 引用
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作者 郑若璇 侯英培 +5 位作者 万杰 王媛媛 王一男 杨海欧 林鑫 陈豫增 《铸造》 CAS 2026年第6期568-580,共13页
激光定向能量沉积技术可实现热作模具钢复杂构件的近净成形与高效修复,在模锻、压铸等高温服役模具的制造与再制造中具有明显应用优势,但成形过程中工艺参数波动易影响熔池形貌特征,同时工艺参数的不合理匹配也易引发孔隙、裂纹等成形缺... 激光定向能量沉积技术可实现热作模具钢复杂构件的近净成形与高效修复,在模锻、压铸等高温服役模具的制造与再制造中具有明显应用优势,但成形过程中工艺参数波动易影响熔池形貌特征,同时工艺参数的不合理匹配也易引发孔隙、裂纹等成形缺陷,从而制约成形质量稳定性。为明确工艺参数在激光定向能量沉积成形热作模具钢过程中的影响机制,本研究围绕工艺参数-熔池形貌-成形质量之间的关联关系,依次开展单层单道、单层多道及多层多道沉积试验,系统研究了主要工艺参数对熔池形貌演化行为及沉积件成形质量的调控规律。结果表明,激光功率和扫描速度主导熔池熔化深度与宽度,送粉量与前两者协同决定熔池填充状态;搭接率处于30%~50%区间时可以有效避免道间沟槽、单侧堆积及界面缝隙等缺陷;在激光比能量与绝对送粉率适配形成的最优成形工艺窗口内,可保障粉末完全熔融、层间冶金结合良好且气体充分逸出,使成形件致密度达99%以上且无明显缺陷,参数偏离则会导致因能量与粉末输入失衡引发的未熔合、裂纹或匙孔等缺陷,进而劣化成形质量。该研究结果明确了工艺参数对熔池形貌的调控机制,为激光定向能量沉积成形热作模具钢的工艺参数优化及成形质量控制提供了试验依据。 展开更多
关键词 激光定向能量沉积 热作模具钢 工艺参数 熔池形貌 成形质量 冶金结合 工艺窗口 缺陷控制
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薄壁铜管高速旋转模压缩径轴向力分析及失稳判定 认领 引用
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作者 周广生 张赛军 +1 位作者 罗桐 谢豪 《锻压技术》 CAS CSCD 北大核心 2026年第3期89-93,共5页
以薄壁铜管端部高速旋转模压缩径工艺为研究对象,针对旋转-轴向推进复合滑动条件下轴向力构成机理变化及薄壁区易起皱和局部屈曲失稳的问题,建立考虑旋转摩擦分解与温度软化效应的轴向力预测模型,并进一步基于能量法与塑性铰等效模型推... 以薄壁铜管端部高速旋转模压缩径工艺为研究对象,针对旋转-轴向推进复合滑动条件下轴向力构成机理变化及薄壁区易起皱和局部屈曲失稳的问题,建立考虑旋转摩擦分解与温度软化效应的轴向力预测模型,并进一步基于能量法与塑性铰等效模型推导失稳临界轴向力,构建成形稳定性判据以获得工艺窗口。结果表明:模具转速与径厚比对稳定成形区间具有显著影响,当径厚比为50时,转速由1500 r·min-1提升至9000 r·min-1,预测最大允许进给速度由4 mm·s-1提升至38 mm·s-1,试验临界值由1 mm·s-1提升至35 mm·s-1,除低转速工况外,理论预测结果与试验临界值之间的相对误差均小于8%;在转速为9000 r·min-1的条件下,径厚比由50降低至16.66,稳定成形区间显著扩展。试验结果与理论预测整体一致,验证了模型的有效性。 展开更多
关键词 薄壁铜管 高速旋转模压缩径 轴向力 温度软化 起皱失稳 工艺窗口
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高深径比硅通孔电镀铜用抑制剂的优选及工艺窗口 认领 引用
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作者 刘萃 刘乐言 +4 位作者 陈珊宜 洪捷凯 赵相 江玉鑫 罗继业 《电镀与涂饰》 CAS 北大核心 2026年第4期9-16,共8页
[目的]针对高深径比硅通孔(TSV)电镀填充中的空洞缺陷问题,筛选适用于铜互连工艺的高效抑制剂。[方法]通过循环伏安法对比了聚乙二醇20000(PEG 20000)、环氧乙烷与环氧丙烷嵌段共聚物(PE6400和17R4)及聚环氧乙烷−聚环氧丙烷单丁基醚(50H... [目的]针对高深径比硅通孔(TSV)电镀填充中的空洞缺陷问题,筛选适用于铜互连工艺的高效抑制剂。[方法]通过循环伏安法对比了聚乙二醇20000(PEG 20000)、环氧乙烷与环氧丙烷嵌段共聚物(PE6400和17R4)及聚环氧乙烷−聚环氧丙烷单丁基醚(50HB-260)四种抑制剂对铜电沉积的抑制能力,并通过TSV电镀填孔实验进行验证;研究了电流密度和对流强度对TSV填充效果的影响,以确定适宜的工艺窗口。[结果]PEG 20000在100~200 mg/L的质量浓度范围内均能实现无空洞、无缝隙的TSV填充,其对对流强度具有良好的适应性,在搅拌速率不低于1 L/min的条件下均可实现无缺陷填充。采用“0.1 A/dm2→0.2 A/dm2→0.3 A/dm2→0.4 A/dm2”的多段阶梯电流密度进行电镀,可有效控制抑制剂在TSV中的吸附分布,实现自底向上的超填充。[结论]PEG 20000是一种高效、稳定的TSV电镀抑制剂,具有较宽的工艺窗口。 展开更多
关键词 硅通孔 铜互连 高深径比 电镀铜 抑制剂 工艺窗口
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冷喷涂增材制造镁/铝双金属热变形行为及热加工性能 认领 引用
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作者 张启绪 刘思桐 +3 位作者 龙锦川 蔺永诚 邓磊 韩旭 《精密成形工程》 北大核心 2026年第4期69-78,共10页
目的探究冷喷涂增材制造镁/铝双金属热变形过程中的流变行为及工艺窗口。方法先采用冷喷涂工艺制备镁/铝双金属复合材料,随后在温度523~673 K、应变速率0.001~1 s-1、最大变形量50%的条件下,开展热压缩变形试验。通过对试验结果进行... 目的探究冷喷涂增材制造镁/铝双金属热变形过程中的流变行为及工艺窗口。方法先采用冷喷涂工艺制备镁/铝双金属复合材料,随后在温度523~673 K、应变速率0.001~1 s-1、最大变形量50%的条件下,开展热压缩变形试验。通过对试验结果进行观察,分析镁/铝双金属的流变曲线特性,建立了基于Z参数的Arrhenius高温本构模型,并计算了不同变形条件下材料的热变形激活能,构建了三维激活能图。此外,利用修正的动态材料模型和Murty流变失稳判据,构建了三维热加工图;通过将二者结合以建立激活能-加工图,获得了材料在不同变形条件下的流变失稳区和安全变形区。结果镁/铝双金属的流变曲线随应变的增加呈现明显的再结晶软化特征,并对变形温度和应变速率因素十分敏感,流变应力随着变形温度的升高和应变速率的降低而减小。结论所建立的高温本构模型能够对不同变形条件下双金属的流变应力进行精确预测;基于激活能-加工图获得的最优热变形工艺窗口为:变形温度530~570 K,应变速率0.001~0.006 s-1。 展开更多
关键词 镁/铝双金属 冷喷涂增材制造 热变形行为 热加工性能 工艺窗口
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具有工业化前景的乙醇酸基共聚物的研究进展 认领 引用
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作者 韩奕 刘爱炜 +2 位作者 茹越 戚桂村 高达利 《石油化工》 CAS CSCD 北大核心 2026年第5期790-801,共12页
聚乙醇酸(PGA)作为一种新型的煤基生物可降解工程塑料,因优异的性能受到了广泛关注,被认为是最具工业化前景的可降解塑料之一。但它固有的高脆性和极窄的加工温度窗口严重限制了工业化应用。通过共聚对PGA的分子链结构及规整性、链段运... 聚乙醇酸(PGA)作为一种新型的煤基生物可降解工程塑料,因优异的性能受到了广泛关注,被认为是最具工业化前景的可降解塑料之一。但它固有的高脆性和极窄的加工温度窗口严重限制了工业化应用。通过共聚对PGA的分子链结构及规整性、链段运动能力等进行调控可使其获得更低熔融温度和更高韧性。系统综述了近年来具有工业化前景的乙醇酸基共聚物合成方法、主要性能和应用方向,为PGA的共聚改性及工业化应用提供参考。 展开更多
关键词 聚乙醇酸 乙醇酸基共聚物 共聚改性 脆性 加工温度窗口
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X Window核心系统的民文支持 认领 引用 被引量：6
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作者 谢谦 吴健 孙玉芳 《中文信息学报》 北大核心 2005年第4期97-104,共8页
Linux系统对少数民族文字的支持需要建立在国际化机制基础上,本文在总结现有Linux国际化框架层次结构基础上,分析了X核心系统国际化的一些关键问题,并以增加藏文支持的实践为例,系统说明了增加民族文字支持所需对X核心系统进行的改动,... Linux系统对少数民族文字的支持需要建立在国际化机制基础上,本文在总结现有Linux国际化框架层次结构基础上,分析了X核心系统国际化的一些关键问题,并以增加藏文支持的实践为例,系统说明了增加民族文字支持所需对X核心系统进行的改动,对在相关项目中的实施情况和效果进行了评估,最后结合其他民族文字系统的研究,对这些工作的局限性进行了深入分析,并提出了今后的工作方向。 展开更多
关键词 计算机应用 中文信息处理 X窗口系统 国际化 藏文
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单光子激光雷达动态熵窗噪声抑制研究 认领 引用
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作者 代领 赵旭 +2 位作者 李连鹏 杜江 林景晨 《激光与红外》 CAS CSCD 北大核心 2026年第4期513-520,共8页
针对单光子激光雷达在复杂场景中的噪声干扰及稀疏信号提取难等问题,本文提出了一种融合动态熵窗机制的光子事件谱域特征提取方法。首先通过蒙特卡罗随机逻辑方法构建全链路光子传输模型,模拟生成了含噪声本底的三维点云数据集;进而融... 针对单光子激光雷达在复杂场景中的噪声干扰及稀疏信号提取难等问题,本文提出了一种融合动态熵窗机制的光子事件谱域特征提取方法。首先通过蒙特卡罗随机逻辑方法构建全链路光子传输模型,模拟生成了含噪声本底的三维点云数据集;进而融合光子事件熵值理论,设计了自适应汉明窗函数,通过局部熵值序列的时域演化特征实现噪声光子鉴别并去除。实验结果显示:基于蒙特卡罗方法的模拟方法能够有效复现单光子激光雷达的工作流程,并生成具有各种环境特征的点云数据集;使用滑动窗口计算光子事件熵,选取光子较小熵值点作为信号光子判据的去噪算法,噪声去除率达到了97%,展现出了显著的噪声抑制性能。该研究为提升单光子激光雷达抗干扰能力提供了理论框架。 展开更多
关键词 单光子激光雷达 蒙特卡罗建模 仿真模型 熵窗处理 特征提取
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基于工作过程的“Windows网络操作系统”课程教学设计 认领 引用 被引量：1
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作者 赵尔丹 张照枫 《煤炭技术》 CAS 北大核心 2011年第12期237-238,共2页
Windows操作系统是目前世界上使用最广泛的操作系统,使我们对计算机的应用更直接,更易用。基于工作过程的Windows教学体系建设成为高等职业教育的需要。文章介绍以工作过程为导向的"Windows网络操作系统"课程教学的设计和探... Windows操作系统是目前世界上使用最广泛的操作系统,使我们对计算机的应用更直接,更易用。基于工作过程的Windows教学体系建设成为高等职业教育的需要。文章介绍以工作过程为导向的"Windows网络操作系统"课程教学的设计和探索过程,课程充分利用局域网+虚拟机技术,仿真网络管理员的真实工作环境;利用企业真实项目仿真网络管理员的真实工作内容,有机地将工作与学习结合起来。 展开更多
关键词 工作过程 Windows网络操作系统 设计
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Windows 8下基于镜像文件的内存取证研究 认领 引用 被引量：3
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作者 向涛 苟木理 《计算机工程与应用》 CSCD 2013年第19期63-67,共5页
内存取证是计算机取证的一个重要分支,而获取内存镜像文件中进程和线程信息是内存取证技术的重点和难点。基于微软最新操作系统平台Windows 8,研究其进程和线程的获取方法。运用逆向工程分析技术对Windows 8下进程和线程相关内核数据结... 内存取证是计算机取证的一个重要分支,而获取内存镜像文件中进程和线程信息是内存取证技术的重点和难点。基于微软最新操作系统平台Windows 8,研究其进程和线程的获取方法。运用逆向工程分析技术对Windows 8下进程和线程相关内核数据结构进行分析,提取出相应特征;基于这些特征,提出了一种能够从物理内存镜像文件中得到系统当前进程和线程信息的算法。实验结果和分析表明,该算法能够成功提取隐藏进程和非隐藏进程,及其各进程相关的线程信息,为内存取证分析提供了可靠的数据基础。 展开更多
关键词 内存取证 Windows8 进程 线程 物理内存分析
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基于Windows的有限元建模程序GEFEM 认领 引用 被引量：2
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作者 关振群 顾元宪 李长余 《计算结构力学及其应用》 1996年第3期373-377,共5页
MSWindows是新一代图形软件开发的标准平台，GEFEM是基于该平台开发的交互式有限元建模程序，它同网格剖分程序配合，完整地实现了人机交互的有限元前置处理。本文介绍了Windows编程的一些主要特点和在GEFEM中采用的内存管理、图形函数... MSWindows是新一代图形软件开发的标准平台，GEFEM是基于该平台开发的交互式有限元建模程序，它同网格剖分程序配合，完整地实现了人机交互的有限元前置处理。本文介绍了Windows编程的一些主要特点和在GEFEM中采用的内存管理、图形函数接口。 展开更多
关键词 有限元 前处理 窗口系统 交互图形编程
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