系统发生

The tunable photon broad band radio frequency phaser based on a silicon ring resonance cavity comprises a pumping signal light-generating system, a carrier wave light-restraining double-sideband generating system, a silicon ring resonance system and a measuring system; wherein, the silicon ring resonance system comprises a light coupling device and the silicon ring resonance cavity; the output of the light coupling device is connected with the input port of the silicon ring resonance cavity; wherein, the silicon ring resonance cavity is composed of a silicon annulet and a root of a straight waveguide; the air gap distance between the silicon annulet and the root of the straight waveguide is several ten nanometers or several hundred nanometers; the taking characteristic of the silicon ring resonance cavity is the characteristic of a seasonal reject trap; the transmission rate in the position of a resonance wavelength is equal to zero or is very close to zero.

本发明包括：泵浦信号光发生系统、载波抑制光双边带产生系统，硅基环形谐振腔系统，以及测量系统。所述硅基环形谐振腔系统包括一个光耦合器和一个硅基环形谐振腔，光耦合器的输出连接到硅基环形谐振腔的输入端口，其中：硅基环形谐振腔由一个硅基微环和一根直波导构成，硅基微环和一根直波导之间的空气隙间隔为几十至几百纳米，硅基环形谐振腔频谱特征是周期性的带阻滤波特性，在谐振波长处的透射率等于0或非常接近0。

So we designed a adaptive synchronizing controller based on hereinbefore hardware environment: first a small magnitude reference signal r is outputted to system through the signal card (to ensure that the vibrating system works in a linear state), and this signal is sent to the moving coil of vibrator through the power amplifier, so vibration is produced through electromagnetic induction. Secondly the vibration signal can feedback to the data acquiring card in the servo system through the acceleration sensor on the Vibroseis reactor M〓 and the base-plate M〓, then the computer can get the current vibrating state y〓 of the coil of vibrator according to the feedback information from the data acquiring card, and give a real time comparing between the current state y〓 and the reference output y〓 of the set-in reference model with current reference input being r , then regulates the correlative controlling parameters according to the error e〓=y〓-y〓 till y〓→y〓, finally normal signal sweeping begins with a certain phase fixed. Meanwhile a synchronization signal for seismic signal record is sent to seismograph from synchronization signal outputting component in the Vibroseis system to perform the controlling process of synchronization of sweeping phases.

为此，我们基于以上的硬件环境设计了一个自适应同步控制器：首先通过信号发生卡对系统输出小幅度的参考信号r(从而保证振动系统工作处于线性状态)，信号通过前置放大器、功率放大器等送到激震器动圈，并通过电磁感应产生振动，振动信号通过可控震源激震器反应块M〓和基板M〓上的加速度传感器反馈给伺服系统中的数据采集卡，工控计算机根据采集卡的反馈信息，获取当前激震器动圈的振动状态y〓，并实时地将该状态与内置的参考模型在当前参考输入r下的参考输出y〓进行辨识，再将两者输出误差e〓＝y〓-y〓对系统的有关控制参数进行调整，直至y〓→y〓，最后在经过某一固定的相位后，开始信号的正常扫描过程，与此同时，由可控震源系统的同步信号输出部件向地震仪送出一地震信号记录同步信号，进而完成扫描相位同步控制过程。

First the passivity of motor rotor flux subsystem is proved. Workless forces have no influence on the energy balance equation and have no effect on the asymptotic stability. Then it is discussed that the system can stably track the reference rotor flux without rotor flux observer. At last an adaptive PBC strategy is proposed with regard to the rotor resistance change. A clear and simple design for the speed control subsystem with inner current loops is presented.

证明了感应电机转子磁链子系统的无源性，找到系统能量耗散特性方程中的无功力，它不会影响系统的稳定性，得出无需转子磁链观测反馈即能稳定跟踪转子磁链的参考值，同时考虑电机转子电阻在运行中发生未知变化，设计自适应调节器使系统对转子电阻呈现鲁棒性，构建了带电流内环速度控制系统。

Besides, after this system has been brought into operation for 1 year, there was abundant ecology in the surroundings, and any ecological imbalance such as ecological singularization or species advantages has not happened due to the set-up of this system.

统合分析，本系统未来并没有铺设不透水布之必要性，且本系统运作ㄧ年之后，周遭生态丰富，并不会因为设置本系统，而造成生态单一化、某些物种优势化生态失衡的情况发生，植种结构有34科87种；两栖类有3科4种；爬虫类有6科10种；鱼类有4科8种，且有多种鸟类接近或进入本系统中，并且本系统排放水因溶氧较进流时增加，可改善河川水体因河川溶氧降低、水量减少而造成河中鱼类暴毙的窘境。

Taking the development platform of HVDC power transmission for example, the calculation result of impedance-frequency characteristic of traditional line commutated converter and that of FCC are compared. Simulation results show that the impact of impedance-frequency characteristic of converter on the resonance frequency of AC system is not negligible, and FCC can enhance the strength of AC system in a certain extent, improve system stability and effectively reduce AC equivalent impedance under resonance frequency, thus the harmonic instability of HVDC power transmission system can be avoided.

以直流输电开发平台为例，对传统电网换相换流器(line commutated converter，LCC)与FCC的阻抗频率特性计算结果进行对比，仿真结果表明换流器的阻抗频率特性对交流系统的谐振频率有着不可忽略的作用，FCC在一定程度上提高了交流系统强度，改善了系统稳定性，有效降低了系统谐振频率下的交流等值阻抗，从而更好避免直流输电系统谐波不稳定现象的发生。

With the rapid developments of science and technology, the modern avion simulation system faces two requirements. One is function requirement and the other is technology renovation requirement. As to the first requirement, functions of modern avion are becoming more and more abundant, which causes the flight simulation training change greatly. As to the second requirement, with the development and adoption of new technology, high verisimilitude requirements are raised to avion simulation system.

中文题名现代军机飞行仿真系统的研究副题名外文题名 A study on modern avion flight simulation system 论文作者黄安祥导师李明陈宗基学科专业导航、制导与控制研究领域\研究方向学位级别博士学位授予单位北京航空航天大学学位授予日期2003 论文页码总数150页关键词军用飞机飞行仿真系统仿真馆藏号BSLW /2003 /V271 /3 随着科学技木的飞速发展，现代军机仿真训练系统面临两大需求：一是功能需求，现代军机功能的增强，使飞行仿真训练内容发生了较大变化；二是技术更新需求，新技术的发展及其在仿真系统中的应用，对军机仿真系统的逼真度提出了更高的要求。

In this paper, the author takes the construction on pre-tensioned rain pipe in Huawei factory premises for-example and according to the characteristics of closenessrain drain system, gives the explanation of the cause and propose a reasonable solution.

以华为电气厂房雨水悬吊管破裂工程为例，根据屋面雨水排水系统中的密闭式内排水系统的特点，阐述了悬吊管破裂事故发生的原因，提出了相应的处理措施，以避免类似事故的发生。

An electromagnetic power steering kinematics model is built combined with the sensor and power equipment"s kinematics characteristic, then according to bond graph theory the bond graph model and diamond model of the electromagnetic power steering system are built based on the kinematics model. They could lead to the system"s transfer function, which is combined with automobile"s two freedom degree model, finally leads to the system"s model in condition with step input of steering wheel.

结合转矩传感器和电磁力发生装置的动力学特性建立了电磁式助力转向系统的动力学模型，然后在系统的动力学模型的基础上根据键合图理论建立了电磁式助力转向系统的键合图模型及其方块图模型，从而导出系统的传递函数，再结合二自由度汽车模型，最终建立了系统在方向盘转角阶跃输入下的模型。

To assure extinguishing efficiency of the fire suppression system on fire, the system is requested to perform enclosure integrity test in accordance with NFPA 2001 standard. For reducing the high cost of test, this thesis proposes a method of using backpropagation neural network to simulate the field test and estimate the retention time when the suppressant is discharged, the result can be a reference of self-survey and the improvement prior to fire inspection.

为确认气体自动灭火系统安装后，是否能於火警发生时立即发挥灭火功效，我国内政部消防署要求业主须依照美国国家消防协会NFPA 2001规定，进行防护区空间气密测试，然实际於现场进行气密测试耗费人力并且所费不赀，本论文提出以倒传递类神经网路模拟现场气密测试，估测灭火气体释放后防护区气密时间，以作为消防检查前自主检查及改善之参考，确保火灾发生时系统能达到真正灭火的功能而防患未然。

The MSHA cited the Massey mine for hundreds of violations in recent years, including 10 so far this year related to legal requirements for ventilation systems to control methane and highly explosive coal dust.

MSHA称，Massey Energy Co。旗下的这座煤矿近年来发生过数百起违反矿山安全规程的事件，今年迄今为止就有10起违反煤矿通风系统要求的事情发生，这一系统旨在控制矿井内甲烷和高爆炸性煤尘的浓度。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。