噪声控制

Compared with the prior art, the invention has the advantages that:(1) the active neural microelectrode integrates signal collection/processing and stimulation function in the same preposed signal processing chip, which can reduce the disturbance of environmental noise, inhibit the attenuation caused by parasitic capacitance, filter polarized voltage and greatly improve the speech-noise ratio and stability of the whole microelectrode; and (2) the active neural microelectrode integrates digital logic control and stimulation circuit in the chip, so as to reduce the amount of output leads and simplify the complexity of subsequent circuits.

本发明相对于现有技术具有如下突出特点：(1)将信号的采集，处理以及刺激功能集成在一个前置信号处理芯片上，不仅减少了因为环境噪声的干扰，而且很好的抑制了寄生电容引起的衰减，滤除了极化电压，大大增强了整个微电极的信噪比和稳定性；(2)同时，将数字逻辑控制和刺激电路也集成在此芯片上，减少了输出引线的数目，简化了后续电路的复杂性。

In this paper a power-saving scheme for mobile Ad hoc networks based on IEEE 802.11 DCF is proposed.Under the proposed scheme,the source node will regulate the transmit power of the data packets dynamically by the use of a method of pre-estimation of average noise power and the feedback of RTS/CTS handoffs during the reception.

基于IEEE 802.11 DCF MAC协议提出了一种适用于移动无线自组网的功率控制节能方案，在该方案中节点通过一种接收过程中的噪声功率预估计方法和RTS/CTS握手机制的反馈，动态调节待发送数据分组的发射功率。

The damping composite structures with three-layered damping materials were prepared. The damping properties were studied with the finite element method.

随着现代科学技术的发展，人们对工作和生活环境的要求也越来越高，振动和噪声的控制日益成为一个复杂而迫切的问题。

With microprocessor control of source and analyzer, the 8903B can perform stimulus-response measurements (such as signal-to-noise ratio and swept distortion) automatically with no additional equipment.

随着微机控制的源和分析仪，在8903B能激励响应测量（如信号噪声比和席卷失真）自动不需要额外的设备。

The boundary of analytical model and statistical model is clearly divided in this performance model, and evaluation accuracy is improved. Secondly, based on embedded SRAM performance hybrid model, this article adopts bionics algorithm-ant algorithm to optimize hierarchical embedded SRAM structure. This method which adjusts memory system structure improves memory system performance. Finally, considering the factors such as memory cell area, power, delay and reliability, this article establishes static 6-T memory cell area, power, delay and static noise margin equations, analyzes 6-T memory cell device dimension constraints under "read upset" and "write upset", then proposes a method to enhance embedded SRAM performance by optimizing 6-T memory cell size. In order to realize embedded SRAM design and verify proposed optimization methods, this article takes the Garfield202 system chip as the platform, which embeds A720T processor and 20KB Scratch-Pad memory.

首先针对嵌入式SRAM结构，采用多元线性回归方法分析SRAM宏单元性能指标，采用解析方法分析控制电路延时，结合以上这两种方法建立嵌入式SRAM性能混合模型，该模型清晰划分两种建模方法的各自适用范围，提高了模型精度；其次以该混合模型为基础建立存储体性能目标函数，采用仿生优化算法—蚂蚁算法优化嵌入式SRAM结构，使之达到最优设计；最后综合考虑面积、功耗、速度以及可靠性等因素，建立静态6-T存储单元面积、功耗、延时以及静态噪声容限方程，分析了&读破坏&和&写破坏&的晶体管尺寸约束，优化了6-T存储单元尺寸，提高了嵌入式SRAM性能。

This working stability of instrument , performance are good, smaller than 1dB through correcting the error of measuring, it is 40 to measure the range --96dB, can meet general civil need , can apply industrial and mining enterprises , organ school ,etc.

该仪器工作稳定、性能良好，经校正测量误差小于1dB，测量范围为40——96dB，能满足一般民用需要，可广泛应用于工矿企业、机关学校等需要对环境噪声进行测量和控制的场合。

Under the precondition of assuming the stock price did not following the famous geometric Brown law, and agents have no exact knowledge of the probability distribution for the uncertain economic shock and return rate perturbation, chapter five presents the uncertain dynamic models of portfolio choice and option hedging respectively. In this chapter, we define the H〓 norm of transfer function from disturbance input to control output as financial risk measurement, and investigate the risk-attenuating robust H〓 portfolio investment and option hedging strategies.

第五章在金融证券价格并非服从几何布朗运动，收益率波动和外部噪声扰动的统计特性未知的情况下，分别建立了金融经济领域证券组合投资及期权套期保值问题的动态模型，引入从扰动输入到评价输出传递函数的H〓范数作为金融风险的度量指标，运用鲁棒H〓控制技术，研究了抑制金融风险的动态证券投资和期权套期保值决策问题。

The first industrial production teflon thin film majority uses have re-equipped the plank veneer peeling lathe turns on lathe cuts the processing, this traditional veneer peeling lathe uses the mechanical drive control generally, produces not only the thin film the quality is not high, the reliability is bad; Moreover in the production process the noise is big, consumes energy much, the production efficiency is not high, is unable to adapt the now industrial production demand.

The 第一工业生产聚四氟乙烯打开车床裁减处理，这台传统表面饰板削皮车床一般使用机械驱动控制，生产不仅质量不是高的薄膜，可靠性是坏；而且在生产过程中噪声大，消耗能量，生产效率不是高的，无法适应现在工业生产demand。

Also said driving, tried to play the version only to provide NESSION 350Z, but some four kind of different color different re-equipping edition chose (partner for you to think this vehicle buttocks oversized, kept off line of sight very much), had under the QUICKPLAY pattern around the city and drifts two kind of patterns: The around the city pattern is four Che Bishui arrives the end point most quickly, this racecourse is not very long, but has several S curves to need to be careful, the vehicles were inferior the previous generation easy to control, feel and NFS5 are similar, belong to the design quite real that kind, when immediately is turning around in particular front of a train if you hold down the acceleration key not to put the automobile to be able in-situ to spin, discharges the big group the smog, the air vent also can torch.

游戏的音频似乎没有特别值得关注的地方，大部分是赛车发出的声音，诸如发动机的轰鸣声和刹车时轮胎摩擦地面发出的声音等，音乐和环境噪声相当的低，有3首歌供选择，还是那种动感十足的 Hiphop 曲风。再说说驾驶，试玩版只提供了一辆 NESSION 350Z ，不过有四种不同颜色不同改装的版本供你选择(偶认为此车屁股过大，很挡视线)，在 QUICKPLAY 模式下有环城和漂移两种模式：环城模式还是四辆车比谁最快到达终点，该赛道不是很长，但有几个 S 弯道需要小心，车辆不如上一代易控制，手感和 NFS5差不多，属于设计比较真实的那种，尤其是在马上掉转车头的时如果你按住加速键不放汽车会原地打转，排出大团的烟雾，排气孔还会喷火。

Description: This project shall adopt the double-mixing-shaft reciprocal rotary distribution design, with the vibration excitation/isolation system to be floating-connected by double-seated spring and hydraulic system adopting highly-dynamic performance proportion, making unnecessary a separate motor for driving and ensuring high compactness of blocks. The machine should make less noise than similar products, operate quickly, reduce the impact upon change of direction and save energy. Each joint should be linked with knuckle bearing and provided with lubricating device to prevent wear and tear. The automatic control system should use PLC and HMI display of operation, providing accurate and explicit detection of faults.

内容说明：本项目采用双搅拌轴往复旋转布料设计，激振隔振系统采用双座双弹簧浮动连接，液压系统采用高动态性能比例，可使砌块成型机不需要单独电机驱动，能保证砌块密实度大；机台噪声比同类机台小，运行快速，降低变向时的冲击配备，节约能源；各关节部位均用关节轴承联结，具备润滑装置不易磨损；自控制系统选用PLC编制控制器，操作人机界面显示，故障准确明确。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。