系统
- 与 系统 相关的网络例句 [注:此内容来源于网络,仅供参考]
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First, the angular velocity function and maneuver load for certain maneuver flight (including hover, dive-hike and these two combined) are set up. The simulation results of the vibration of double-disk rotor system with cantilever supported on rigid bearings show that rotor would be apparently deformed under maneuver load. Second, the performance of oil force of SFD in maneuver flight is analyzed. The results show that in maneuver flight, the SFD with centering spring will become eccentric and its oil force will be time-related and offset-related. Then, SFDs are introduced into typical Jeffcott rotor system. The whole system will be statically displaced in maneuver flight and the nonsynchronous components of oil force appear in the response of rotor system.
首先,建立了水平盘旋、俯冲拉起及盘旋+俯冲拉起复合机动三种机动飞行条件下的机动角速度函数,并确定了对应机动飞行条件下的机动附加载荷(附加离心力和附加陀螺力矩),分析了带刚支的双盘悬臂转子系统在机动飞行条件下的振动特性,发现发动机转子在机动飞行时会发生明显变形;随后,分析了非定心挤压油膜阻尼器的油膜力特性,机动飞行时,油膜轴颈在机动附加载荷的作用下偏离外环中心,使得带定心弹支的挤压油膜阻尼器也变成了非定心挤压油膜阻尼器,其非定心挤压油膜力是瞬态时变的,并且与SFD油膜轴颈偏移量和进动形态有关;然后,在经典的Jeffcott转子系统中引入带定心弹支的挤压油膜阻尼器,分析了机动飞行时非线性转子系统的振动特性,发现挤压油膜阻尼器油膜力的非协调特性也反映到转子系统的振动响应中;之后,对机动飞行条件下带挤压油膜阻尼器的双盘悬臂转子系统的振动特性进行了分析,并重点分析、总结了俯冲拉起机动飞行时,系统结构参数和工作状态参数(转速比、机动飞行半径、机动角速度等)对该系统振动特性的影响。
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The author of this paper participated the beginning phase of the whole Yun-Wan freeway geological exploration work. After lucubrating GIS exploitation technique and reading plenty of correlative references the author realized that geological data management is of practical value to engineering project department. Thus, thanks to those profound data accumulated during previous explorations, the author developed a professional and practical GIS system for Yun-Wan freeway—EGIS based on exploitation flat roof - Arc View.
作者参与了云万高速公路的整个地质初勘阶段的工作,在深入学习了GIS开发技术和在查阅大量相关参考文献的基础上,并了解了工程设计部门对地质资料管理的实际需求,将工作中所收集到的大量地质勘察资料作为基础源数据,在ArcView GIS的开发平台上,针对云万高速公路开发出了专业型的实用GIS系统——工程地质资料管理信息系统,系统由Access关系数据库管理系统建立属性数据库,由ArcView GIS软件来实现对空间数据库的管理功能;以软件本身所提供的Avenue语言和程序设计语言Visual Basic 6.0作为系统的开发语言,并对ArcView GIS软件本身的不足方面,进行了二次开发,使系统的功能得到了增强,让系统使用起来更加方便和完善。
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The following exciting results are revealed: 1 When considering the influence of some nonlinear elements such as hard-limit of exciters, the effects of some devices such as Power System Stabilizer and Static Var Compensator which can introduce positive damping in power system, the reasonability of system parameter values in simulation, the SNB surface and HB surface on the boundary of SSSR will turn close to each other and even coalesce together; 2 Under some conditions, coupling between slow exciters and shunt capacitors will bring negative damping in power system dynamics, which increases the possibility of oscillatory instability. So the power system with mass shunt compensators is easily subjected to the oscillatory instability. In recent years, chaotic phenomena of power system have been reported many times. Some simulation studies even found chaos existing inside the power system SSSR. In this dissertation, chaotic phenomena in power systems are thoroughly studied in order to make clear the relation of chaos and SSSR. The following results are derived: 1 Based on Li-Yorke Theorem and their definition on the chaos, the existence of chaos in power system is verified; 2 Three possible routes of causing chaos in power system are found and deeply investigated. They are route of cascading period doubling, route of directly initial energizing and route of torus bifurcation (or quasi-periodicity). The latter two routes are investigated for the first time in power system stability studies; 3 When the stability conditions of chaos are broken, it is found they can lead to voltage collapse, angle divergence, or voltage collapse with angle divergence simultaneously.
针对在电力系统小扰动稳定区域内可能存在混沌吸引域的有关报道,本文深入研究了电力系统混沌现象的出现途径和与系统失稳模式之间的关系:1利用Li-Yorke定理和Li-Yorke的混沌定义,从理论上证明了电力系统混沌现象的存在性;2发现了电力系统中导致混沌出现的三种可能途径:倍周期分岔导致混沌、初始能量直接激发混沌和经由环面分岔导致混沌,并对后两种新发现的途径进行了较为细致的研究;3发现了混沌极限环破裂导致电压崩溃、角度失稳以及电压崩溃和角度失稳同时出现的现象,其中混沌极限环破裂导致系统角度失稳和电压崩溃及角度失稳同时出现的现象均属首次报道;4证明由微分-代数方程描述的系统模型,其小扰动稳定域的边界只包含HB、SNB和SIB三种分岔界面,在SSSR的内部和边界上,均不可能存在会导致混沌的点,从而将混沌现象排除在小扰动稳定域的研究之外,简化了后者的研究工作。
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Antiaircraft artillery is the important composing in our country air defense and the fire control system of antiaircraft artillery is the hard core in the antiaircraft artillery because its task is hunting, tracking and computing firing data of antiaircraft artillery, but the firepower control system of medium or minor-caliber antiaircraft artillery that is equipped in our army widespread exists some problems that are follow-up system function badly, the system response slowly and low accuracy and hit probability of whole systems.
高炮火控系统是高炮部队作战的核心,担负着搜索、跟踪、计算高炮射击诸元的目的。但目前我军列装的高炮火控系统普遍存在着随动系统性能差、系统反应时间长、精度以及整个系统的命中概率低的问题,这就需要对火控系统的关键技术进行系统、深入的研究,研制出包含有新的射击体制和射击理念的火控技术,以适应未来作战的需要。
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Special line: PET bottles to send the wind line, PET bottles transmission line, eight-treasure Li transportation, storage assembly line speed chain, refrigerator-line detection of, stainless steel transmission lines around with CPT, conveyor Store line, groove belt, transportation of finished Line, the size and quality control systems, improve water vat, with tailgate climbing belt, with the assembly line stands, the knife-edge transition belt turn, to roll lines, cell delivery systems, computer assembly lines, power assembly lines, power lines Raceway , To send the wind-line, high-speed sorting lines, transmission lines Raceway, drum line, after the assembly lines overhang, the chemical industry transmission lines, aging transmission lines, Tetra transmission lines, transmission lines plate chain, chain lost keel box line, spiral Chain plate line, spiral belt, a motorcycle transmission lines, motorcycle assembly line, climbing belt, a belt transmission line group, bottles of beer delivery systems, aerodynamic balance suspended, the lines between the pneumatic hoist, automotive transmission lines, light-top Transfer or devices, thermal plastic packet transmission line, stretching line wheel, food delivery lines, transmission lines, transmission lines climbing boxes, fruit cleansing transmission lines, the level of circulating conveyor chain, no power lines Raceway, no power telescopic Raceway lines, lines between the hoist, the letter-box sorting systems, conveyor suspension, tobacco conveyor, the parcel sorting conveyor systems, packet transmission lines, packet transmission line combinations, straight plate section, gravity-shelf access device , Heavy-duty power lines Raceway, heavy-duty conveyor chain, chain of beads to lose face envelope, turning plate, vehicle loading and unloading conveyor, the assembly line, assembly line, automatic transmission storage systems, feeding
特殊流水线:PET瓶风送线,PET瓶输送线,八宝粥输送骊,倍速链储装配线,冰箱检测线,不锈钢输送线,彩管绕带机,仓储输送线,槽型皮带机,成品输送线,尺寸与质量检测系统,大桶水提升设备,带挡板爬坡皮带机,带灯架装配线,刀口过渡转弯皮带机,地滚线,电池输送系统,电脑装配线,动力装配线,动力滚道线,风送线,高速分拣线,滚道线输送系统,滚筒线,后悬装配线,化工行业输送线,老化输送线,利乐包输送线,链板输送线,龙骨链输箱线,螺旋链板线,螺旋皮带机,摩托车输送线,摩托车装配线,爬坡皮带机,皮带输送线组,啤酒瓶输送系统,气动平衡吊,气动线间提升机,汽车输送线,轻型顶升移载装置,热塑膜包输送线,伸缩滚轮线,食品输送线,输送线,输箱爬坡线,水果输送清洗线,水平循环链式输送机,无动力滚道线,无动力伸缩滚道线,线间提升机,信盒分拣系统,悬挂输送机,烟草输送机,邮包输送分拣系统,邮包输送线,邮包组合输送线,直段板式机,重力式货架存取装置,重型动力滚道线,重型链式输送机,珠面链输包线,转弯板式机,装卸车输送机,装配流水线,装配线,自动仓库输送系统,上料机
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Based on the detailed analyzing of impact system working process, the differential eguation of the system was got, and the mathematical model of the hydraulic impact system was builted, on basis of the mathematical model, By using of dynamic simulation function of Matlab ,the author has built the simulation model of the impact system based on software Simulink and run it after inputting the parameter ,the dynamic graph curve of impact velocity and presser of oil and position of knife rest were got, and the dynamic characteristic of impact system was analyzed,the simulated results are accorded with the fact,and some rational parameters can be found.
在对冲击式采煤机液压冲击系统工作过程进行详细分析的基础上,运用微分方程建模方法,建立了液压冲击系统的数学模型即系统的动态方程,并在该数学模型的基础上,采用Matlab中的Simulink动态仿真功能,建立了基于Simulink的冲击系统仿真模型,通过给定冲击式采煤机冲击系统的相关参数,对该系统进行仿真,得到了冲击式采煤机工作过程中冲击速度和油液压力以及刀架位移的变化曲线,进而对冲击系统的动态特性进行了分析,结果与实际情况较为吻合,并由此得出某些合理的参数。
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Because the error mainly comes from theresonant region, the error correction method can only be used in resonant region, andcan effectively improve the efficiency of the statistical analyzing solutions. Two types of the mistuned bladed disks, whose friction damping are blade dryfriction damping and blade-to-blade dry friction damping, are modeled respectively. Amulti-harmonic method which can employ the fast Fourier transformationtechnique is proposed to investigate the vibratory response of the bladed disks withthese two types of nonlinear friction damping. Formulations of the solution for thesetwo types of motion functions are deduced. The characteristics of the forced responseof the bladed disks with these two dry friction damping are analyzed and summarizedunder various system parameters. The vibratory response of the bladed disk with dryfriction scatter mistuning is investigated.
针对叶盘系统中两类主要的非线性干摩擦阻尼形式,分别建立了具有叶片干摩擦阻尼和叶间干摩擦阻尼的失谐叶盘系统的非线性力学模型;提出了一种可利用快速傅立叶变换技术的多谐波分析方法;分别推导了具有这两类干摩擦阻尼形式的叶盘系统运动方程的求解公式;在各种系统参数条件下,研究了干摩擦阻尼失谐叶盘系统的受迫振动响应特性;对具有干摩擦散乱失谐的叶盘系统振动响应进行了研究,分析总结了干摩擦散乱失谐对叶盘系统振动响应特性的特殊影响规律。
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TIS uses the basic mode for reference of CIS in management of corporation, and develops the theory to form the TIS that is made up of TMIS (Television Mind Identity System),TBIS (Television Behavior Identity System),TVIS (Television visual Identity System) and TAIS(Television Audio Identity System).
这一系统借鉴了企业形象识别系统的基本模式,并在此基础上进行了发展,建立了由电视理念识别系统、电视行为识别系统、电视视觉识别系统和电视听觉识别系统四个要素构成的形象战略系统,试图为电视媒体的形象建设实践提供有益的帮助。
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This design is the Guangzhou lan west 100 markets summer the central air-conditioning system design, the primary mission completes one, two, three, four buildings load computation; Air-conditioning system plan efficient analysis and water unit's shaping; The air-conditioning system freezing stands design; Four buildings shopping area air conditioning unit's shaping, wind system and aqueous system design; Four buildings work area air blower plate tube system design; And has drawn up four winds tubes floor-plan, the wind side chart, the engine room floor-plan, the aqueous system axis side chart.
本次设计课题是广州市蘭西一百商场夏季中央空调系统设计,主要任务是完成一、二、三、四楼的冷负荷计算;空调系统方案的经济性分析和制冷机组的选型;空调系统冷冻站的设计;四楼购物区空调机组的选型,风系统和水系统的设计;四楼办公区风机盘管系统的设计;并绘制了四层风管平面布置图、风管轴侧图、机房平面布置图,水系统轴侧图。
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Vacuum frying kettle, heat the oil circulation systems, vacuum systems, water vapor and trap systems, hydraulic systems, pneumatic systems, automatic oil from the system, electrical control system.
真空油炸釜、油循环加热系统、真空系统、水汽捕集系统、液压系统、气动系统、自动脱油系统、电气控制系统。
- 推荐网络例句
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However, as the name(read-only memory)implies, CD disks cannot be written onorchanged in any way.
然而,正如其名字所指出的那样,CD盘不能写,也不能用任何方式改变其内容。
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Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.
镀锌钢托盘多用于出口,替代木托盘,免薰蒸,符合欧盟、北美各国对出口货物包装材料的法令要求;喷涂钢托盘适用于重载上货架之用,托盘表面根据需要制作成平板状、波纹状及间隔形式,满足不同的使用要求。
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A single payment file can be uploaded from an ERP system to effect all pan-China RMB payments and overseas payments in all currencies.
付款指令文件可从您的 ERP 系统上传到我们的电子银行系统来只是国内及对海外各种币种付款。