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Take Every Step Firmly with Sharp Eyes

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Chinese Journal of Chemistry 2024年第10期42卷 1065-1066页

作者： Shengming ma Chinese Journal of Chemistry

Chinese Journal of Chemistry(CJC)is committed to becoming a prominent international journal for chemistry and the related *** are working very hard towards this *** offers a diverse range of manuscript types,including... 详细信息

关键词： journal becoming diverse

川西南部地区中侏罗统沙溪庙组优质储层形成条件与控制因素

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天然气工业 2022年第7期42卷 45-54页

作者：谢格云田云英刘柏樊世海马宇含张祎蕾中国石油西南油气田公司川西北气矿

四川盆地西南部地区(以下简称川西南部地区)中侏罗统沙溪庙组具有优越的烃源和油气疏导条件,但多年来天然气勘探一直未获得重大突破。为了明确该区沙溪庙组优质储层及勘探有利区,指导下一步天然气的勘探部署,在对川西南部地区沙溪庙组... 详细信息

四川盆地西南部地区(以下简称川西南部地区)中侏罗统沙溪庙组具有优越的烃源和油气疏导条件,但多年来天然气勘探一直未获得重大突破。为了明确该区沙溪庙组优质储层及勘探有利区,指导下一步天然气的勘探部署,在对川西南部地区沙溪庙组物源特征、沉积相带展布、储层岩石类型与储集性能、成岩作用对储层影响等方面开展系统分析的基础上,指出了该区沙溪庙组致密砂岩气优质储层的形成条件和控制因素,进而落实沙溪庙组储层的有利分布区。研究结果表明:①该区沙溪庙组储层岩石类型以长石砂岩和岩屑长石砂岩为主,次为岩屑砂岩、长石岩屑砂岩,沉积受双物源控制,岩屑类砂岩物源来自西部龙门山,长石类砂岩来源于东北部米仓山—大巴山;②长石类砂岩储集性能明显优于岩屑类砂岩,纵向上长石类砂岩主要分布在沙二1亚段和沙二2亚段,横向上以东部地区最发育;③区内优质储层受沉积作用控制明显,河口坝、水下分流河道沉积的细—中粒长石砂岩物性最佳;④压实作用和胶结作用是沙溪庙组储层致密化、孔隙减小的主要因素,绿泥石胶结对原生孔隙具一定的保护作用,溶蚀作用是孔隙度增大的主要因素。结论认为,川西南部地区沙溪庙组三角洲平原分流河道、三角洲前缘水下分流河道及河口坝等相带的长石砂岩发育区是优质储层有利分布区,其中熊坡断裂以东地区,是下一步致密砂岩气勘探的重点方向。

关键词：四川盆地西南部地区中侏罗统沙溪庙组致密砂岩气储层特征控制因素沉积相成岩作用勘探方向

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基于医疗信息科普的图解设计研究——以乳腺癌防控教育为例

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设计 2023年第13期36卷 28-31页

作者：马钰焓王瑾北京林业大学艺术与设计学院

研究利用设计手段提升图解设计在医疗信息科普过程中高效、便捷、准确地传达知识信息的具体方法,实现医疗信息的更高效清晰准确传达。运用案例分析法、归纳总结法,分析得出图解设计在医疗信息科普中的影响意义、应用价值及设计原则。为... 详细信息

研究利用设计手段提升图解设计在医疗信息科普过程中高效、便捷、准确地传达知识信息的具体方法,实现医疗信息的更高效清晰准确传达。运用案例分析法、归纳总结法,分析得出图解设计在医疗信息科普中的影响意义、应用价值及设计原则。为医疗信息科普中图解设计的相关研究和实践提供参考。

关键词：图解设计医疗信息读图时代信息可视化信息科普

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孤岛联网后独立型微电网改造方案与实现

浙江电力 2021年第4期40卷 10-16页

作者：龚迪阳汪科马瑜涵张雪松国网浙江省电力有限公司电力科学研究院杭州310014

孤网供电的海岛与大陆联网后,微电网的运行方式将发生变化,通过改造微电网能量管理系统和协调控制系统,针对不同的运行方式给出相应控制策略,将独立型微电网改造成并网型微电网。从系统层面、设备层面和策略配置层面描述了微电网系统架... 详细信息

孤网供电的海岛与大陆联网后,微电网的运行方式将发生变化,通过改造微电网能量管理系统和协调控制系统,针对不同的运行方式给出相应控制策略,将独立型微电网改造成并网型微电网。从系统层面、设备层面和策略配置层面描述了微电网系统架构、能量管理策略和协调控制策略的改造,实现并离网平滑切换、黑启动等功能。应用经济调度运行控制、削峰填谷控制和联络线功率控制等策略,以增强电网间互动、资源互动为目标,与高性能、高拓展能力的协调控制平台及大数据服务相配合,促进就地可再生能源消纳,通过对电源及负荷的合理调度,延缓跨海电缆的扩容升级。

关键词：微电网改造策略运行模式

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Development of a novel signal restoration algorithm to eliminate the distorted components in space charge measurement excited by femtosecond laser irradiation

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High Voltage 2024年第3期9卷 659-673页

作者： Tianrun Qi Hanwen Ren Haoyu Gao Qingmin Li Yidan ma Yiqun ma Tao Xiao State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijingChina

For the space charge measurement method with optical excitation for electrical insulation,the distortion of the excitation laser on the measurement signal and the accumulation of space charge have not been discussed *** experiment and simulation results show that three types of distorted components introduced by optical excitation can lead to distortion of the upper interface ***,the factors causing distortion of the measured signal and the formation mechanism are analysed.A virtual electrode potential compensation method and a distorted component extraction method are ***,an attenuation restoration and charge conversion correction factor is intro-duced,leading to a novel signal processing algorithm adapted to space charge optical measurement *** with the traditional algorithm,the novel algorithm has an error of less than 1%in the calculation of charge and electric field strength,with an increase in accuracy of 47.7%and 9.81%,*** applying the novel restoration algorithm,the comparison shows that the space charge accumulation does not change significantly under laser irradiation,verifying the reliability of the optical *** given algorithm can provide a theoretical and technical foundation for the realisation of the optical measurement method for space charge.

关键词： charge algorithm excitation

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基于Pro/E照相机前盖的模具设计

电加工与模具 2008年第3期 53-56页

作者：马玉函卢军陕西科技大学机电学院陕西西安710021

通过对照相机前盖的使用要求进行工艺性分析,介绍了基于Pro/E注射模设计的基本流程,并详细介绍了该注射模的结构组成和设计过程,重点阐述了斜销及点浇口设计要点。

关键词：照相机 Pro/E 斜销点浇口

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A rigorous real-time acoustic positioning method for ocean bottom seismic exploration

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Satellite Navigation 2024年第1期5卷 168-190页

作者： Jinye ma Shouchuan Fang Jianhu Zhao School of Geodesy and Geomatics Wuhan University129 Luoyu RoadWuhan430079China Institute of marine Science and Technology Wuhan UniversityWuhan430079China Surveying Service Center BGP Inc.CNPCZhuozhou072751HebeiChina

The conventional technique for positioning seafloor geophones in ocean bottom seismic exploration encounters several challenges,including the significant impact of outliers on positioning results,underutilization of high-precision observations,and low efficiency in real-time data *** issues inevitably affect the quality of seismic exploration *** address these challenges and enhance the accuracy of geophone positioning,this paper proposes a rigorous real-time acoustic positioning method for geophones based on sequential adjustment and Baarda's outlier detection *** proposed method comprises three key steps:grouping the original acoustic observations,constructing the intra-group acoustic positioning model,and synthesizing the positioning results across the different *** validity and practicality of this approach are confirmed through a simulation experiment as well as the field experiment conducted in the Bohai Sea,*** results demonstrate that the proposed method effectively eliminates outliers in the original observations and maximizes the utilization of high-quality *** to traditional acoustic positioning methods,it significantly reduces positioning errors from meters to decimeters,and in some cases can achieve centimeter-level *** the sound velocity profile in the operating sea area is measured,the method can attain the posterior standard deviation at the millimeter level and positioning errors within 10 *** the sound velocity profile is unknown,the method can achieve the posterior standard deviation at centimeter-level and positioning errors of approximately 20 cm.

关键词： Ocean bottom seismic exploration Geophone positioning Acoustic positioning method Sequential adjustment Outlier detection

L^(*)—An index for evaluating long range performance of autonomous underwater vehicles(AUVs)

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Friction 2024年第10期12卷 2205-2221页

作者： manfu ZHU Liran ma Jianbin LUO State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China

Autonomous underwater vehicles(AUVs)have various applications in both military and civilian fields.A wider operation area and more complex tasks require better overall range performance of ***,until recently,there have been few unified criteria for evaluating the range performance of *** the present work,a unified range index,i.e.,L^(*),considering the cruising speed,the sailing distance,and the volume of an AUV,is proposed for the first time,which can overcome the shortcomings of previous criteria using merely one single parameter,and provide a uniform criterion for the overall range performance of various *** constructing the expression of the L^(*)index,the relevant data of 49 AUVs from 12 countries worldwide have been collected,and the characteristics of the L^(*)range index in different countries and different categories were compared and ***,by analyzing the complex factors affecting the range index,methods to enhance the L^(*)range index value,such as efficiency enhancement and drag reduction,have been introduced and *** this condition,the work proposes a unified and scientific criterion for evaluating the range performance of AUVs for the first time,provides valuable theoretical insight for the development of AUVs with higher performance,and then arouses more attention to the application of the cutting-edge superlubricity technology to the field of underwater vehicles,which might greatly help to accelerate the coming of the era of the superlubricitive engineering.

关键词： autonomous underwater vehicles(AUVs) range performance range index superlubricity drag reduction

A Parameter Adaptive Method for Image Smoothing

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Tsinghua Science and Technology 2024年第4期29卷 1138-1151页

作者： Suwei Wang Xiang ma Xuemei Li School of Computer Science and Technology Shandong UniversityJinan 250101China School of Software Shandong UniversityJinan 250101China

Edge is the key information in the process of image smoothing. Some edges, especially the weak edges, are difficult to maintain, which result in the local area being over-smoothed. For the protection of weak edges, we propose an image smoothing algorithm based on global sparse structure and parameter adaptation. The algorithm decomposes the image into high frequency and low frequency part based on global sparse structure. The low frequency part contains less texture information which is relatively easy to smoothen. The high frequency part is more sensitive to edge information so it is more suitable for the selection of smoothing parameters. To reduce the computational complexity and improve the effect, we propose a bicubic polynomial fitting method to fit all the sample values into a surface. Finally, we use Alternating Direction Method of Multipliers (ADMM) to unify the whole algorithm and obtain the smoothed results by iterative optimization. Compared with traditional methods and deep learning methods, as well as the application tasks of edge extraction, image abstraction, pseudo-boundary removal, and image enhancement, it shows that our algorithm can preserve the local weak edge of the image more effectively, and the visual effect of smoothed results is better.

关键词： image smoothing parameter adaptation bicubic interpolation polynomial fitting