检索结果-南通市图书馆

探究计算机技术在图形图像处理中的应用与关键技术

在线全文

学校读者我要写书评

暂无评论

办公自动化 2024年第14期29卷 4-6页

作者：陈清玲马银涛神木市职业技术教育中心榆林719300

我国正处于快速发展时期,各方面都在快速改革和进步。因此,对于图形图像处理技术也提出更高的要求。计算机技术在图形图像处理中的应用越来越广泛,不仅提高人们对于图形图像处理的质量和效率,而且对社会发展也产生重要影响。文章首先对... 详细信息

我国正处于快速发展时期,各方面都在快速改革和进步。因此,对于图形图像处理技术也提出更高的要求。计算机技术在图形图像处理中的应用越来越广泛,不仅提高人们对于图形图像处理的质量和效率,而且对社会发展也产生重要影响。文章首先对计算机技术在图形图像处理中的应用内容展开分析,随后从图像增强技术、图像边缘检测技术和图像识别技术等方面深入探讨计算机技术中图形图像处理中的关键所在。希望文章能为相关从业者提供参考,提高我国图形图像处理水平。

关键词：计算机技术图形图像处理应用关键技术

在线全文

学校读者我要写书评

暂无评论

计算机技术在电子商务中的应用探讨

办公自动化 2024年第15期29卷 73-75页

作者：马银涛陈清玲神木市职业技术教育中心榆林719300

文章探讨计算机技术在电子商务领域中的广泛应用及其对行业发展的深远影响。通过分析数据处理、大数据分析、云计算、人工智能及区块链技术在电子商务中的具体应用,揭示这些技术如何提升电子商务的运营效率、安全性和用户体验。文章旨... 详细信息

文章探讨计算机技术在电子商务领域中的广泛应用及其对行业发展的深远影响。通过分析数据处理、大数据分析、云计算、人工智能及区块链技术在电子商务中的具体应用,揭示这些技术如何提升电子商务的运营效率、安全性和用户体验。文章旨在提供一份对计算机技术在电子商务应用现状的全面概述,并指出未来的发展趋势和潜在挑战。

关键词：计算机技术电子商务大数据分析云计算人工智能

在线全文

学校读者我要写书评

暂无评论

注射溶脂针导致的免疫原分枝杆菌感染1例

中华整形外科杂志 2022年第5期38卷 546-548页

作者：黄倩周永生马寅涛李双萍郭超郴州市第四人民医院肛肠烧伤科郴州423000

注射溶脂针是近年来兴起的非手术整形方式, 其作为一种有创治疗本身存在一定的风险。目前对于注射溶脂针引起的非结核分枝杆菌感染报道较为少见。2020年10月, 郴州市第四人民医院肛肠烧伤科收治1例在美容院行溶脂针注射术后注射部位出... 详细信息

注射溶脂针是近年来兴起的非手术整形方式, 其作为一种有创治疗本身存在一定的风险。目前对于注射溶脂针引起的非结核分枝杆菌感染报道较为少见。2020年10月, 郴州市第四人民医院肛肠烧伤科收治1例在美容院行溶脂针注射术后注射部位出现感染的患者。患者右上臂、腹部、腰部及背部有多处包块, 大小约3 cm×4 cm, 皮肤色红, 皮温高, 有明显波动感, 有触痛。经检查诊断为皮肤脓肿, 行脓肿清创术, 彻底清除脓腔内坏死组织并予以持续负压引流。病理活检为慢性肉芽肿病变。行分泌物培养为快速生长型非结核分枝杆菌。微生物基因检测为免疫原分枝杆菌。内科治疗选用阿米卡星静脉滴注1个月, 口服克拉霉素6个月, 服用药物期间无特殊不适, 停药半年后复查, 患者病灶已完全愈合, 无复发。

关键词：感染非结核分枝杆菌注射剂美容业并发症

Uniform decomposition of velocity gradient tensor

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2024年第1期36卷 24-34页

作者： Chenxi ma Chaoqun Liu Department of mathematics University of Texas at ArlingtonArlingtonTXUSA

In this paper,the principal decomposition of the velocity gradient tensor[∇v]is discussed in 3 cases based on the discriminant∆:∆0 with 3 distinct real eigen values,and∆=0 with 1 or 2 distinct real eigen *** velocity gradient tensor can also be classified as rotation point,which can be decomposed into three parts,i.e.,rotation[R],shear[S]and stretching/compression[SC],and non-rotation point,we defined a new resistance term[L],and the tensor can be decomposed into three parts,i.e.,resistance[L],shear[S]and stretching/compression[SC].Example matric are also displayed to demonstrate the new *** of principal decomposition between 3 different cases,and between Resistance and Liutex will also be discussed.

关键词： Velocity gradient Liutex resistance fluid kinematics

VOC emitted by biopharmaceutical industries:Source profiles,health risks,and secondary pollution

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第1期135卷 570-584页

作者： Jiawei ma Lin Li State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China National Engineering Laboratory for VOCs Pollution Control material&Technology University of Chinese Academy of SciencesBeijing 101408China

The biopharmaceutical industry contributes substantially to volatile organic compounds(VOCs)emissions,causing growing concerns and social developmental *** study conducted an on-site investigation of the process-based emission of VOCs from three biopharmaceutical *** the workshops of the three enterprises,26 VOCs were detected,which could be sorted into 4 classes:hydrocarbons,aromatic hydrocarbons,oxygen-containing compounds,and nitrogen-containing *** were the main components of waste gases,accounting for 44.13%-77.85%of the overall ***-based source profiles were compiled for each process unit,with the fermentation and extraction units of tiamulin fumarate being the main source of VOC *** heptanone,vinyl acetate,diethylamine,propylene glycol methyl ether(PGME),and benzene were screened as priority pollutants through a fuzzy comprehensive evaluation *** level concentration simulation results of the Gauss plume diffusion model demonstrated that the diffusivity of VOCs in the atmosphere was relatively high,indicating potential non-carcinogenic and carcinogenic risks 1.5-2 km ***,the process-based formation potentials of ozone and secondary organic aerosols(SOAs)were determined and indicated that N-methyl-2-pyrrolidone,dimethyl heptanone,and PGME should be preferentially controlled to reduce the ozone formation potential,whereas the control of benzene and chlorobenzene should be prioritized to reduce the generation of *** results provide a basis for understanding the characteristics of VOC emission by biopharmaceutical industries and their diffusion,potentially allowing the development of measures to reduce health risks and secondary pollution.

关键词： Biopharmaceutical Volatile organic compound Priority pollutant Exposure risk Secondary pollution

A review of recent advances in the effects of surface and interface properties on marine propellers

在线全文

学校读者我要写书评

暂无评论

Friction 2024年第2期12卷 185-214页

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

marine propellers are important propulsion devices for both surface ships and underwater *** severe environmental problems have required further performance enhancement for ***,traditional methods to improve propeller performances through geometrical and structural optimizations have been extensively investigated,while the underlying mechanisms of the effects of surface and interface properties on marine propellers are still far from being fully *** paper presented a comprehensive review of recent advances in the effects of surface and interface properties,such as surface roughness and surface wettability,on marine propellers with an emphasis on the significant improvements in both hydrodynamic and cavitation performances,hoping to arouse more in-depth investigations in the field of surface/interface science and technologies on marine propellers,and also promote the state-of-the-art technologies,such as superlubricity technology,into practical applications.

关键词： marine propellers hydrodynamics cavitation surface roughness surface wettability

Copper slag assisted coke reduction of phosphogypsum for sulphur dioxide preparation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第1期65卷 43-53页

作者： Dong ma Qinhui Wang State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou 310027China

The reduction of phosphogypsum(PG)to lime slag and SO_(2)using coke can effectively alleviate the environmental problems caused by ***,the PG decomposition temperature remains high and the product yield remains *** adding additives,the decomposition temperature can be further reduced and PG decomposition rate and product yield can be ***,the use of current additives such as Fe_(2)O_(3)and SiO_(2)brings the problem of increasing economic ***,it is proposed to use solid waste copper slag(CS)as a new additive to reduce PG to prepare SO2,which can reduce the cost and meet the environmental benefits at the same *** effects of proportion,temperature and thermostatic time on PG decomposition are investigated by experimental and kinetic analysis combined with FactSage thermodynamic calculations to optimize the roasting ***,the reaction mechanism is *** is found that adding CS to the coke and PG system can increase the rate of PG decomposition and SO_(2)yield while lowering the PG decomposition *** example,when the CS/PG mass ratio increases from 0 to 1,PG decomposition rate increases from 83.38%to 99.35%,SO_(2)yield increases from 78.62%to 96.81%,and PG decomposition temperature decreases from 992.4℃to 949.6℃.The optimal reaction parameters are CS/PG mass ratio of 1,Coke/PG mass ratio of 0.06 at 1100℃for 20 min with 99.35%PG decomposition rate and 96.81%SO_(2) *** process proceeds according to the following reactions:2CaSO_(4)+ 0.7C + 0.8Fe_(2)SiO_(4)→0.8Ca_(2)SiO_(4)+ 0.2Ca_(2)Fe_(2)O_(5)+ 0.4Fe_(3)O_(4)+2SO_(2)+ 0.7CO_(2)Finally,a process for decomposing PG with coke and CS is proposed.

关键词： Phosphogypsum Sulfur dioxide Copper slag Fluidized-bed Reduction Waste treatment

Input-to-State Stability for Impulsive Switched Singular Systems with Mismatched Disturbances

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2024年第3期37卷 924-946页

作者： YANG Anqing ma Shuping School of Information Engineering Shandong Management UniversityJinan 250357China School of mathematics Shandong UniversityJinan 250100China

This work investigates the input-to-state stability(ISS)problem for impulsive switched singular systems(ISSSs)with mismatched *** this paper,‘disturbance’is a general concept that includes model uncertainty,unknown system dynamic,external disturbance,*** modified uncertainty and disturbance estimator(UDE)-based control method is presented for singular systems and ISSSs,a virtual control is introduced to offset the effects of mismatched *** the basis of a discontinuous multiple Lyapunov functional and admissible edge-dependent average dwell time(AED-ADT)method,several sufficient conditions in terms of linear matrix inequalities(LMIs)are obtained to ensure that the closed-loop systems are regular,impulse-free and ***,two examples are given to demonstrate the effectiveness of the proposed results.

关键词： Impulsive switched singular systems input-to-state stability UDE-based control

Damping Characteristic Analysis and Optimization of Wind-thermal-bundled Power Transmission by LCC-HVDC Systems

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 299-312页

作者： Liwen Zheng Shiying ma the Power System Department China Electric Power Research InstituteBeijing 100192China

With the rapid development of renewable energy,wind-thermal-bundled power transmission by line-commutated converter based high-voltage direct current(LCC-HVDC)systems has been widely *** dynamic interaction mechanisms among permanent magnet synchronous generators(PMSGs),synchronous generators(SGs),and LCC-HVDC system become *** deal with this issue,a path analysis method(PAM)is proposed to study the dynamic interaction mechanism,and the damping reconstruction is used to analyze the damping characteristic of the ***,based on the modular modeling,linearized models for the PMSG subsystem,the LCC-HVDC subsystem,and the SG subsystem are ***,based on the closed-loop transfer function diagram of the system,the disturbance transfer path and coupling relationship among subsystems are analyzed by the PAM,and the damping characteristic analysis of the SG-dominated oscillation mode is studied based on the damping *** with the PAM,the small-signal model of the system is obtained and eigenvalue analysis results are ***,the effect of the control parameters on the damping characteristic is analyzed and the conclusions are verified by time-domain ***,the penalty functions of the oscillation modes and decay modes are taken as the objective function,and an optimization strategy based on the Monte Carlo method is proposed to solve the parameter optimization *** simulation results are presented to validate the effectiveness of the proposed strategy.

关键词： Wind-thermal-bundled power transmission line-commutated converter based high-voltage direct current(LCC-HVDC) path analysis method(PAM) damping characteristic analysis Monte Carlo method