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VLSI Design for High-Precision Three-Dimensional Depth Perception Chip

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Chinese Journal of Electronics 2021年第3期30卷 556-560页

作者： GE Chenyang yao huimin ZHOU Yanhui DENG Pengchao Institute of Artificial Intelligence and Robotics Xi'an Jiaotong University Institute of electromagnetic and information technology Xi'an Jiaotong University

This paper presents a Very large scale integration(VLSI) design method for Three-dimensional(3 D) depth perception chip based on infrared coding structure light. The primary sub-modules on the chip contain the speckle pattern preprocessing module, blockmatching disparity estimation, depth mapping and postprocessing. The chip employs pipelining technology,and after Application specific integrated circuit(ASIC)verification, it proves that our chip has more advantages in performance of depth precision(12 bits, 1 mm @ 1 m),image resolution(1280×960), time delay(less than 17 ms),range limit(0.4～6 m). It also can generate more stable and smooth depth map in real-time, which can be used in 3 D recognition, motion capture or scene perception.

关键词： Semiconductor integrated circuits Image recognition Computer vision and image processing techniques 3D depth perception structure light coding VLSI ASIC

中国西沙海域永兴岛—七连屿海域鱼体内有机污染物含量特征与来源解析及风险评价

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岩矿测试 2024年第1期43卷 152-165页

作者：姚慧敏陆天启钟奕昕寻看雨颜巧丽黄磊中国地质调查局广州海洋地质调查局三亚南海地质研究所海南三亚572025 中国地质调查局长沙自然资源综合调查中心湖南长沙410600

环境中的有机污染物对生态系统和人类健康产生严重威胁。有机污染物在全球海域鱼体内普遍检出,且长期食用会对人类造成一定的健康风险。为研究中国西沙海域鱼体内有机污染物污染情况、来源及生态风险,本文利用气相色谱-质谱法(GC-MS)分... 详细信息

环境中的有机污染物对生态系统和人类健康产生严重威胁。有机污染物在全球海域鱼体内普遍检出,且长期食用会对人类造成一定的健康风险。为研究中国西沙海域鱼体内有机污染物污染情况、来源及生态风险,本文利用气相色谱-质谱法(GC-MS)分析测定了永兴岛和七连屿鱼体内有机氯农药(OCPs)、多环芳烃(PAHs)和多氯联苯(PCBs)的含量,采集了包括蜂巢石斑鱼、红裸颊鲷、黑身蓝子鱼在内的17种鱼类共50条。结果表明:鱼体内OCPs、PAHs和PCBs的总含量均值范围分别为2.23~91.57ng/g ww、2.11~31.70ng/g ww和1.55~54.04ng/g ww,平均值分别为32.50ng/g ww、17.29ng/g ww和18.79ng/g ww,中位数分别为16.92ng/g ww、13.34ng/g ww和7.61ng/g ww。双对氯苯基三氯乙烷(DDTs)类农药在美欧沿海鱼体内的含量分别为0.65~107.6ng/g ww和763~5357ng/g lw,中国浙江沿海水域鱼体内PAHs含量为10.4~140ng/g ww,地中海、意大利沿海和美国查尔斯顿港口采集的鱼体内PCBs含量分别为1234~12327ng/g lw、56.8~4791ng/g lw和5.02~232.20ng/g ww,研究区DDTs和PAHs含量水平处于全球海域的低端,推测由于研究区远离污染源。利用DDTs/[双对氯苯基二氯乙烯(DDE)+双对氯苯基二氯乙烷(DDD)]比值来判断DDTs的来源,研究区50%鱼体内DDTs/(DDE+DDD)>1,表明中国西沙海域有部分新近输入的DDTs,研究区沉积物来源为陆源,推测中国西沙海域DDTs为陆源DDTs和永兴岛农业活动的综合作用。利用蒽(ANT)/[ANT+菲(PHE)]比值>0.1或该比值0.1,表明PAHs来源于化石燃料燃烧。风险评价结果显示,鱼体内OCPs和PCBs生态风险低。

关键词：中国西沙海域海鱼有机污染物气相色谱-质谱法含量特征来源解析生态评价

A new implementation of image-processing engine for 3D visualization and stereo video stream display

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Chinese Science Bulletin 2014年第5期59卷 459-467页

作者： Chenyang Ge Zuoxun Hou huimin yao Nanning Zheng Wenzhe Zhao Institute of Artificial Intelligence and Robotics Xi’an Jiaotong University

This paper presents a new implementation of a high-definition image-processing engine,which mainly targets the 3-dimensional(3D)visualization and stereo video stream display of binocular display *** engine is compatible with the mainstream analog and digital stereo videos in component format and is able to receive stereo composite video broadcast signals using an integrated analog stereo video *** four modules include a spatiotemporal scaling transform engine,a 2D–3D converter,an image animating engine,and a 2D scalar operating in pipeline architecture to implement the video format conversion and the stereo effect ***,the data access,hardware structure,and system-level configurations are ***,the proposed architecture is realized by 0.18 lm CMOS *** application-specific integrated circuit verification results show that the engine can generate a strong feeling of 3D immersion and highdefinition image quality with minimal *** chip has wide compatibility and an uppermost 1080P-processing capacity,which has approximately 3.5 million gates with about 43 mm2 die size.

关键词：图像处理引擎数字立体声三维可视化显示设备视频流模拟立体声视频格式转换 CMOS技术

Water quality and light absorption attributes of glacial lakes in Mount Qomolangma region

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Journal of Geographical Sciences 2013年第5期23卷 860-870页

作者： YAN huimin yao Zhijun HUANG Heqing JIANG Dong DONG Xiaohui DUAN Rui ZHANG Yili Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China

As they are products of glacier movement, the water body composition and water quality attributes of glacial lakes have distinct characteristics compared with inland lakes. Although satellite remote sensing provides an effective approach to monitor water quality, lack of in-situ measurement data on the status and environment surrounding glacial lakes presents a major constraint in relating satellite data to water quality indicators. This study presents findings of a preliminary investigation into water quality attributes of 3 glacial lakes in the Mount Qomolangma region. Suspended particulate matter （SPM）, light absorption attributes of phytoplankton, nonalgal particles （NAP）, and colored dissolved organic matter （CDOM） were measured. The suspended substance concentration varies markedly from 0-320 mg/L. This is considered to reflect differing stages of lake development. l-he chlorophyll concentra- tion is much lower than that found for inland lakes, as landscapes that surround these high altitude lakes have almost no vegetation growth. The phytoplankton and CDOM concentration depend on long-term stability of lake slopes. Given the lack of exogenous and endogenous inputs in the Qomolangma region, CDOM in glacial lakes is significantly lower than in inland lakes. These preliminary findings could support efforts to appraise estimates of water quality parameters using remotely sensed images.

关键词： Mount Qomolangma glacial lake water quality light absorption remote sensing

电感耦合等离子体发射光谱(ICP-OES)法在地质样品测定中的研究进展

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中国无机分析化学 2024年第4期14卷 401-409页

作者：颜巧丽杨远聂小力杨天信刘贤红姚慧敏陈美华中国地质调查局长沙自然资源综合调查中心长沙410600 湖南农业大学资源环境学院长沙410128

电感耦合等离子体发射光谱仪在地质样品中无机元素分析测试时是常用仪器,具有灵敏度高,干扰小,测定线性范围广、稳定性好等优点。对电感耦合等离子体发射光谱法测定地质土壤,岩石样品时采用的酸溶法、碱熔法、烧结法三种消解体系各自特... 详细信息

电感耦合等离子体发射光谱仪在地质样品中无机元素分析测试时是常用仪器,具有灵敏度高,干扰小,测定线性范围广、稳定性好等优点。对电感耦合等离子体发射光谱法测定地质土壤,岩石样品时采用的酸溶法、碱熔法、烧结法三种消解体系各自特点及消解剂的特性进行综述;详细分析了样品测定时外标法、内标法、标准加入法的选择及应用;探讨了样品测试时仪器条件的优化措施,同时分析了电感耦合等离子体发射光谱仪的干扰校正方法。最后,对电感耦合等离子体发射光谱测定技术在地质样品中非金属元素分析物测定的应用及未来发展进行了展望。

关键词：电感耦合等离子体发射光谱消解体系条件优化干扰校正

Tribological Behaviors of Electroless Nickel-Boron Coating on Titanium Alloy Surface

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Chinese Journal of Mechanical Engineering 2024年第1期37卷 309-320页

作者： yao Jia Jianping Lai Jiaxin Yu huimin Qi Yafeng Zhang Hongtu He Key Laboratory of Testing Technology for Manufacturing Process in Ministry of Education State Key Laboratory of Environment-Friendly Energy MaterialsSouthwest University of Science and TechnologyMianyang 621010China

Titanium alloys are excellent structural materials in engineering fields,but their poor tribological properties limit their further *** plating is an effective method to enhance the tribological performance of alloys,but it is difficult to efficiently apply to titanium alloys,due to titanium alloy’s strong chemical *** this work,the electroless Nickel-Boron(Ni-B)coating was successfully deposited on the surface of titanium alloy(Ti-6AL-4V)via a new pre-treatment ***,linearly reciprocating sliding wear tests were performed to evaluate the tribological behaviors of titanium alloy and its electroless Ni-B *** was found that the Ni-B coatings can decrease the wear rate of the titanium alloy from 19.89×10^(−3)mm^(3)to 0.41×10^(−3)mm^(3),which attributes to the much higher hardness of Ni-B *** heat treatment,the hardness of Ni-B coating further increases corresponding to coating crystallization and hard phase ***,heat treatment does not improve the tribological performance of Ni-B coating,due to the fact that higher brittleness and more severe oxidative wear exacerbate the damage of heat-treated ***,the Ni-B coatings heat-treated both in air and nitrogen almost present the same tribological *** finding of this work on electroless coating would further extend the practical applications of titanium alloys in the engineering fields.

关键词： Electroless coating Titanium alloy Tribology Wear Heat treatment Nanoindentation

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家用电冰箱冰水功能的用户体验研究

家电科技 2024年第2期2卷 104-107页

作者：薛皓高韬姚惠民刘赞喜刘铁伟张向平海信冰箱有限公司山东平度266700

自动制冰和饮水功能已成为高端家用电冰箱的重要功能之一。在以欧美为主的海外市场,配置了制冰机和饮水系统的产品占据着其冰箱产品中相当大的比例。近年来,配置了冰水功能的冰箱在海内外市场越来越受欢迎,各厂家在冰水功能开发上的投... 详细信息

自动制冰和饮水功能已成为高端家用电冰箱的重要功能之一。在以欧美为主的海外市场,配置了制冰机和饮水系统的产品占据着其冰箱产品中相当大的比例。近年来,配置了冰水功能的冰箱在海内外市场越来越受欢迎,各厂家在冰水功能开发上的投入也随之增加,但与其相关的行业标准却不够完善,尤其是用户体验性的标准亟待完善。为解决这一难题,通过研究,归纳总结了对于带门上取冰、取水功能的冰箱,影响其冰水功能用户体验性的各项影响因素,如出冰、出水速度,取冰飞溅量、取水温度、滴水量等,并对其逐一提出了较为详尽的试验方法和判定基准。该方案弥补了目前行业中冰水功能用户体验性方面试验、评价标准的空缺,对于家用电冰箱自动制冰、饮水系统的研究具有一定的参考意义。

关键词：电冰箱自动制冰机冰箱门上饮水机用户体验试验研究

基于非靶向代谢组学技术的不同季节信阳白茶品质分析

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食品科技 2024年第5期49卷 50-56页

作者：孔亚帅卫艺炜万亚欣王晶晶姚慧敏尹鹏王子浩郭桂义信阳农林学院茶学院河南省豫南茶树资源综合开发重点实验室河南信阳464000

为探寻春季和秋季生产的信阳白茶品质和代谢轮廓差异,采用非靶向代谢组学技术和多元统计分析结合感官审评方法对春秋季节信阳白茶样品进行检测分析。结果表明:春季生产的信阳白茶感官品质优于秋季,特别是汤色。在正离子模式下春秋季节... 详细信息

为探寻春季和秋季生产的信阳白茶品质和代谢轮廓差异,采用非靶向代谢组学技术和多元统计分析结合感官审评方法对春秋季节信阳白茶样品进行检测分析。结果表明:春季生产的信阳白茶感官品质优于秋季,特别是汤色。在正离子模式下春秋季节信阳白茶中共检测到6842个质谱特征离子。多元统计分析中Alpha多样性分析结果显示春季生产的信阳白茶样品的代谢物丰富度显著高于秋季;Beta多样性分析显示春季和秋季生产的信阳白茶样品间具有显著性差异并筛选出26个差异化合物,主要包括氨基酸及其衍生物类、磷脂酰类、有机酸类、嘌呤碱类等。代谢途径富集分析结果表明,春季和秋季生产的信阳白茶间的差异代谢物主要富集在以次级代谢物的生物合成途径,丙氨酸、天冬氨酸和谷氨酸代谢途径,异喹啉生物碱合成途径,黄酮和黄酮醇生物合成途径以及赖氨酸降解途径为主导的代谢途径中。这些途径中代谢物种类和含量的变化,对春季和秋季信阳白茶风味的形成具有重要影响,为后续信阳白茶精准生产提供理论基础。

关键词：非靶向代谢组学信阳白茶生产季节品质分析

Research on the Aerodynamic Characteristics of Leading Edge and Bulge of Ram-Air Parafoil Based on CFD

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World Journal of Engineering and Technology 2023年第4期11卷 989-999页

作者： Lei Ding Lingrui Chen Yalei Bai huimin yao Chuanyu Gao College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing China

This study focuses on the aerodynamic characteristics and flow mechanism of three different configurations of ram-air parafoil with open/closed air inlet and bulges. Firstly, we designed a special parafoil configuration for this study. Then we used numerical simulation to obtain the aerodynamic data of three parafoils at different angles of attack, and studied the influence of the bulge and the leading edge open/closed inlet on the aerodynamic performance of the ram-air parafoil. Finally, we study the flow mechanism of the ram-air parafoil through the pressure distribution and flow field. The results of the study show that compared with the aerodynamic parameters of the parafoil without bulges, the optimal angle of attack of the two parafoils with bulges is increased by 4?, the maximum lift to drag ratio of the parafoil with closed leading edge is reduced by about 4.3% and the optimal angle of attack is reduced by about 2?. The maximum lift to drag ratio of the parafoil with open leading edge is reduced by about 23.6% and the stalling angle of attack is reduced by about 4?. The pressure on the surface of a ram-air parafoil with open leading edge inlet is the highest. .

关键词： Ram-Air Parafoil Numerical Simulation Aerodynamic Characteristics Flow Mechanism