摘要：A microwave-H202 process for sludge pretreatment exhibited high efticiencies of releasing organics, nitrogen, and phosphorus, but large quantifies of H202 residues were detected. A uniform design method was thus employed in this study to further optimize H202 dosage by investigating effects of pH and H202 dosage on the amount of 1-I202 residue and releases of organics, nitrogen, and phosphorus. A regression model was established with pH and H202 dosage as the independent variables, and H202 residue and releases of organics, nitrogen, and phosphorus as the dependent variables. In the optimized microwave-H202 process, the pH value of the sludge was firstly adjusted to 11.0, then the sludge was heated to 80~C and H202 was dosed at a H202 ：mixed liquor suspended solids （MLSS） ratio of 0.2, and the sludge was finally heated to 100~C by microwave irradiation. Compared to the microwave-H202 process without optimization, the H202 dosage and the utilization rate of H202 in the optimized microwave-H202 process were reduced by 80% and greatly improved by 3.87 times, respectively, when the H202：MLSS dosage ratio was decreased from 1.0 to 0.2, resulting in nearly the same release rate of soluble chemical oxygen demand in the microwave-H202 process without optimization at H202：MLSS ratio of 0.5.

摘要：Two types of coaxial self-balancing robots(CSBR)were proposed,one can be used as a mobile robot platform for parts transporting in unmanned factory or as an inspector in dangerous areas,and the other can be used as a personal transporter ridden in *** designing and control structures as well as control strategies were described and compared in order to get a general way to develop such robots.A state feedback controller and a fuzzy controller were designed for the robot using DC servo motors and the robot using torque motors,*** experiments indicate that the robots can realize various desired operations smoothly and agilely at the velocity of 0.6 m/s with an operator of 65 ***,the robustness of the controllers is revealed since these controllers can stabilize the robot even with unknown external disturbances.

摘要：对140GHz带状注弯折波导的色散特性和耦合阻抗进行了仿真。CST微波工作室的仿真表明该波导在140GHz时,波导内电磁波的轴向相速度为0.227c,且140GHz频率附近色散特性平坦。波导的耦合阻抗在140GHz时为5Ω左右。CST粒子工作室注波互作用的仿真结果表明该弯折波导在140GHz处的功率增益为24.6dB。该弯折波导带状电子注的设计保证了该波导的加工工艺与MEMS微加工工艺兼容。通过SU-8UV-LIGA工艺实现了对该波导的微型加工。测试结果表明该波导的反射损耗S11与插入损耗S21分别为-28dB和-1.2dB。实测的输出功率增益达到23dB。测试结果和仿真结果的一致性表明该弯折波导设计的合理性,同时也验证了多步SU-8UV-LIGA工艺可以实现对该波导的高精度加工。

摘要：为解决汽车轮胎压力无线监测系统(TPMS)电能自给问题,应用压电换能原理,提出将PZT5压电振子复合在轮胎内底面,把运行中的机械能转换为电能为无线发射模块供电的思想,设计了一种压电陶瓷轮胎发电机。建立了双层膜压电振子的有限元(FEA)模型,运用ANSYS 11.0对不同尺寸的振子进行静力和瞬态分析,得出设计振子尺寸的依据。针对单个振子发电量低的状况,提出采用阵列方式增大发电量的方案,设计了一种多振子电量耦合输出调节控制电路。选择振子尺寸为40mm×15mm,实验得到单片压电振子在15 Hz固定形变的激励下,有效输出电流为5μA,峰值电压为5 V以上。当振子数量为40个以上时,轮胎发电输出的功率能满足TPMS休眠模式耗电30μW,发射耗电35mW,间歇时间30 s的需要。实验表明,压电阵列式轮胎发电机平均输出功率为150～350μW,瞬时输出功率可达到50mW。

摘要：Conventional f-x prediction filtering methods are based on an autoregressive model. The error section is first computed as a source noise but is removed as additive noise to obtain the signal, which results in an assumption inconsistency before and after filtering. In this paper, an autoregressive, moving-average model is employed to avoid the model inconsistency. Based on the ARMA model, a noncasual prediction filter is computed and a self-deconvolved projection filter is used for estimating additive noise in order to suppress random noise. The 1-D ARMA model is also extended to the 2-D spatial domain, which is the basis for noncasual spatial prediction filtering for random noise attenuation on 3-D seismic data. Synthetic and field data processing indicate this method can suppress random noise more effectively and preserve the signal simultaneously and does much better than other conventional prediction filtering methods.

摘要：为了改善微机电系统(MEMS)电容式加速度计的噪声特性,提出了一种基于开关电容的低噪声闭环接口电路。该电路采用电荷积分器作为前级预放大装置,对寄生电容不敏感,而且具有非常低的噪声。采用相关双采样(CDS)技术消除了1/f噪声和运算放大器失调电压的影响。同时,为了改善系统的动态响应特性,反馈部分采用积分电路,提高了系统阻尼比和响应速度。利用电荷泻放通道实现了自检测功能。采用0.5μm CMOS工艺完成了版图设计,仿真结果表明,系统灵敏度为0.115V/g,非线性度<0.12 %,可检测的最小加速度为20μg,自检测输出与自检测电压成正比。

摘要：基于磁通门传感器的二次谐波选择法原理,采用0.6μm,N-well标准模拟CMOS工艺,设计并实现了磁通门传感器专用集成电路接口(ASIC)。这种集成磁通门接口电路能够减小传统分立元件接口电路的体积,降低系统能耗,满足航天、军事等领域的微型化、低功耗需求。在分析磁通门传感器结构和特点的基础上,完成了激励电路及检测电路的设计,芯片面积为2.0mm×2.0mm,并采用HSPICE对电路各部分功能及其指标进行验证。对与微型磁通门探头集成的电路系统进行了测试,结果表明,当测量范围为±90μT时,灵敏度可达16.5mV/μT;在5V电源电压下,其功耗为35mW。

摘要：A new fabrication technology for three-dimensionally buried silica on silicon optical waveguide based on deep etching and thermal oxidation is presented. Using this method, a silicon layer is left at the side of waveguide. The stress distribution and effective refractive index are calculated by using finite element method and finite different beam propagation method, respectively. The results indicate that the stress of silica on silicon optical waveguide fabricated by this method can be matched in parallel and vertical directions and stress birefringence can be effectively reduced due to the side-silicon layer.

摘要：微机电系统工艺模拟可在实际加工前预测MEMS器件的实际结构,有利于理解工艺机理,缩短设计周期,减少生产费用。针对目前用于MSMS器件分析的模拟软件尚不能很好地与有限元软件对接的问题,设计了工艺模拟软件与有限元分析软件的接口。通过这个接口,将MEMS工艺模拟所得到的数据经过数据格式的转换导入有限元分析软件(ANSYS)中并建模,使之可以进行诸如机械、热、电等物理参量的分析。在分析了目前关于(曲线)边界轮廓提取的各种方法后,引进了最大圈算法,解决了工艺模拟结果在有限元软件中的模型重构问题,实现了从工艺模拟到有限元分析的无缝对接。提出的接口设计对实现MEMSCAD体系化具有重要的促进作用。

摘要：The C programming language is expressive and flexible, but not safe; as its expressive power and flexibility are obtained through unsafe language features, and improper use of these features can lead to program bugs whose causes are hard to identify. Since C is widely used, and it is impractical to rewrite all existing C programs in safe languages, so ways must be found to make C programs safe. This paper deals with the unsafe features of C and presents a survey on existing solutions to make C pro- grams safe. We have studied binary-level instrumentation tools, source checkers, source-level instrumentation tools and safe dialects of C, and present a comparison of different solutions, summarized the strengths and weaknesses of different classes of solutions, and show measures that could possibly improve the accuracy or alleviate the overhead of existing solutions.