瞬态

US EPA heavy duty diesel engine transient test cycle

美国重型柴油机瞬态法？

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.

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。

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。

The; of down-lead of 200 A binary electric current that the design made intensity of central field magnetic induction be 3 T is opposite through the experiment of the thermal resistance of interior of the leakage heat of voltaic down-lead, heat exchanger and line of high temperature superconduction and cupreous matrix solder resistor undertook metrical, studied refrigeration engine trouble or the transient state temperature of down-lead of the electric current below power cut condition changes.

设计制作了中心场磁感应强度为3 T的200 A二元电流引线；通过实验对电流引线的漏热、换热器内部的热阻以及高温超导线和铜基体的焊接电阻进行了测量，并探究了制冷机故障或者停电状态下电流引线的瞬态温度变化。

This paper presents a computer-controlled high speed data acquisition system for measuring the stress change of the cutters on a drilling bit.

研制了一套由微机控制的高速数据采集系统，用于洲试钻头破岩过程中切削齿上所受切削力的瞬态变化规律。

The experimental studies and theoretical analysas of dust ignition process induced by a shock sweeping a dust layer are presented in this paper.

采用瞬态阴影技术及红外光电传感器技术实验研究了沉积玉米粉的激波点火过程，并对此进行了理论分析。

Stress time curves of five representative fields of engine connecting rod and the high stress field are given.

该连杆满足使用寿命要求，通过对连杆的瞬态响应计算，为设计出满足强度、刚度及轻量化要求的连杆提供了参考依据。

Selfresonant cavitating jet is a kind of modulated jet with significant impact pressure fluctuations and cavitation effects.

自振空化射流是利用瞬态流和水声学原理调制而成的一种新型射流，本文研究了自振空化射流在常压及围压下的压力脉动特性及其参数影响规律。

Requirements: Familiar with elementary test and measurement procedures of EMC; master EMC standards relating to the particular category of the company's products, and master the basic clue of a product's improvement; familiar with various certification flow of system products along with their embedded IC components; possess rich experience in the products' hardware design and deep understanding toward circuit's (master controller and interface) principles; also can make suggestions about components' (including capacitor, magnetic core, filter, inductor, instant depressors, etc) choices which would benefit to improvement of EMC characteristics of a system product. A candidate should be able to use and master structural shield mechanism with in-depth knowledge and experience. The candidate needs to be able to provide experience and vision in EMC's considerations upon various design stages of a system product.

要求：熟悉EMC的基本测试项目以及测试过程，掌握产品对应EMC的标准，把握产品的EMC整改定位思路，熟悉产品的各种认证流程，有丰富的产品硬件知识，对电路等有深度地了解；能建议使用和选择EMC设计整改元器件（电容、磁珠、滤波器、电感、瞬态抑制器件等）使用，掌握，有产品结构屏蔽设计的技能和经验，对EMC设计如何介入产品各个研发阶段流程有经验和见地。

Requirements: Familiar with elementary test and measurement procedures of EMC; master EMC standards relating to the particular category of the companys products, and master the basic clue of a products improvement; familiar with various certification flow of system products along with their embedded IC components; possess rich experience in the products hardware design and deep understanding toward circuits (master controller and interface) principles; also can make suggestions about components (including capacitor, magnetic core, filter, inductor, instant depressors, etc) choices which would benefit to improvement of EMC characteristics of a system product. A candidate should be able to use and master structural shield mechanism with in-depth knowledge and experience. The candidate needs to be able to provide experience and vision in EMCs considerations upon various design stages of a system product.

要求：熟悉EMC的基本测试项目以及测试过程，掌握产品对应EMC的标准，把握产品的EMC整改定位思路，熟悉产品的各种认证流程，有丰富的产品硬件知识，对电路等有深度地了解；能建议使用和选择EMC设计整改元器件（电容、磁珠、滤波器、电感、瞬态抑制器件等）使用，掌握，有产品结构屏蔽设计的技能和经验，对EMC设计如何介入产品各个研发阶段流程有经验和见地。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。