Wave-current forces on bipiles in parallel array

-The inline and lift forces on bipiles in parallel array induced by both irregular waves and currents were investigated experimentally in this paper. The characteristics in both time and frequency domains of inline, lift and resultant forces as well were analyzed. The grouping effect coefficients of inline and resultant forces on two piles related to KC number and relative spacing parameters are given. A comparison of the magnitude and direction of resultant forces on two piles in parallel array with the corresponding values for single cylinder is also made.

Mechanical force and cytoplasmic Ca^(2+) activate mechanosensitive BK channel in parallel

BK channels are widely expressed in both excitable and non-excitable cells and known to be involved in many physiological processes,such as vascular smooth tone regulation,neuronal firing and endocrine cell secretion[1].Recently, the BK channels have

Heun Functions Describing Fermions Evolving in Parallel Electric and Magnetic Fields

The present work deals with the behavior of fermions moving in a static magnetic induction and a time-harmonic electric field, both oriented along Oz. For the ultra-relativistic particles described by a Heun double confluent equation, we derive the corresponding wave functions and the conserved current density components.

Research on Mixed Logic Dynamic Modeling and Finite Control Set Model Predictive Control of Multi-Inverter Parallel System

Parallel connection of multiple inverters is an important means to solve the expansion,reserve and protection of distributed power generation,such as photovoltaics.In view of the shortcomings of traditional droop control methods such as weak anti-interference ability,low tracking accuracy of inverter output voltage and serious circulation phenomenon,a finite control set model predictive control(FCS-MPC)strategy of microgrid multiinverter parallel system based on Mixed Logical Dynamical(MLD)modeling is proposed.Firstly,the MLD modeling method is introduced logical variables,combining discrete events and continuous events to form an overall differential equation,which makes the modeling more accurate.Then a predictive controller is designed based on the model,and constraints are added to the objective function,which can not only solve the real-time changes of the control system by online optimization,but also effectively obtain a higher tracking accuracy of the inverter output voltage and lower total harmonic distortion rate(Total Harmonics Distortion,THD);and suppress the circulating current between the inverters,to obtain a good dynamic response.Finally,the simulation is carried out onMATLAB/Simulink to verify the correctness of the model and the rationality of the proposed strategy.This paper aims to provide guidance for the design and optimal control of multi-inverter parallel systems.

Aliasing Errors in Parallel Signature Analyzers

A Linear Feedback Shift Register (LFSR)can be used to compress test response data as a Signature Analyzer(SA). Parallel Signature Analyzers (PSAs) implemented as multiple input LFSRs are faster and re- quire less hardware overhead than Serial Signature Analyzers (SSAs)for compacting test response data for Built-In Serf-Test (BIST)in IC or hoard-testing environments. However, the SAs are prone to aliasing errors because of some specific types of error patterns. An alias is a faulty output signature that is identical to the fault-free signature. A penetrating analysis of detecting capability of SAs depends strongly on mathematical manipulations, instead of being aware of some special cases or examples. In addition , the analysis should not be restricted to a particular structure of LFSR, but be appropriate for various structures of LFSRs. This pa- per presents necessary and sufficient conditions for aliasing errors based on a complete mathematical descrip- tion of various types of SAs. An LFSR reconfiguration scheme is suggested which will prevent any aliasing double errors. Such a prevention cannot be obtained by any extension of an LFSR.

基于系统工程方法的炼化企业联合运行部工作浅析

联合运行部是炼化企业的下属二级单位,负责2套以上工艺装置(或罐区)的运行,具有工艺流程功能、经济效益功能、HSE功能、政治功能等功能。文章针对当前联合运行部普遍存在的问题,提出了优化顶层设计的建议,并介绍了DoDAF方法;针对数据信息缺乏共享,业务流程不够整合的问题,提出进行数智化转型,打破信息孤岛,加强数据价值挖掘的建议;针对炼化行业由于高风险和重资产而容错率低等问题,建议构建模拟仿真与平行系统。并提出加强培养符合时代要求的复合型人才的建议以及对联合运行部在新时代的工作任务进行了展望。

惯导输出模拟器设计

针对惯导组件产品测试中多种信号的输出,设计一种基于FPGA惯导组件输出模拟系统;以FPGA芯片为核心,在Quartus II软件开发平台上使用Verilog语言进行编程然后生成原理图,设计DDS(direct digital synthesizer)信号发生器来输出48路脉冲信号,实现对4个惯导组件输出的48路脉冲信号模拟;在FPGA中采用Verilog硬件描述语言编写8串口发送代码生成原理图,实现对8个惯导组件输出8路串口数据的模拟;通过人机交互界面的按键和液晶对脉冲输出和串口发送的参数进行调节,实现脉冲输出和串口发送的设定;利用DDS技术设计48路脉冲较其他方法精度更高,利用FPGA的并行运算特点实现8路串口数据的并行发送;设计降低了各种测试信号连接时的复杂度,提高了测试信号的稳定度和惯导组件标定的效率。

Parallel readout of two-element CdZnTe detectors with real-time digital signal processing

Readout electronics, especially digital electronics, for two-element CdZnTe （CZT） detectors in parallel are developed. The preliminary results show the detection efficiency of the two-element CZT detectors in parallel with analog electronics is as many as 1.8 and 2.1 times the single ones, and the energy resolution （FWHM） is limited by that of the single one by the means of analog electronics. However, the digital method for signal processing will be sufficiently better by contrast with an analog method especially in energy resolution. The energy resolution by the means of digital electronics can be improved by about 26.67%, compared to that only with analog electronics, while their detection efficiency is almost the same. The cause for this difference is also discussed.

抗痨补肺汤联合化疗治疗耐多药肺结核随机平行对照研究

[目的]观察抗痨补肺汤联合化疗治疗耐多药肺结核疗效。[方法]使用随机平行对照方法,将140例住院患者按区组方法简单随机分为两组。对照组60例吡嗪酰胺(Z),阿米卡星(Am)或卡那霉素(Km)、卷曲霉素(Cm),左氧氟沙星(Lfx)或莫西沙星(Mfx),对氨基水杨酸(PAS)或环丝氨酸(Cs)、乙胺丁醇(E),丙硫异烟胺(Pto),强化阶段治疗6个月;MTB阴转后Z、Lfx(Mix)、PAS(Cs,E)、Pto巩固治疗18个月。治疗组80例抗痨补肺汤(猫爪草、黄连、百部、白芨、沙参、麦冬、百合、生地、黄芪、甘草各20g,水煎1000m L,2次/d;咳嗽剧烈加川贝母、桔梗;咯血加地榆、藕节炭、仙鹤草、白茅根等;低热加功劳叶、银柴胡、百贝、阿胶等;胸痛加广郁金、元胡等);西药治疗同对照组。连续治疗2年为1疗程。观测临床症状、痰培养菌落、血常规、肝肾功能、不良反应。治疗1疗程,判定疗效。[结果]治疗组痊愈69例,显效77例,有效77例,无效3例,总有效率96.25%。对照组痊愈44例,显效50例,有效50例,无效10例,总有效率95.00%。治疗组疗效优于对照组(P<0.05)。肝功能异常发生率、临床症状两组均有改善(P<0.05),治疗组优于对照组(P<0.05)。[结论]抗痨补肺汤联合化疗治疗耐多药肺结核,疗效满意,无严重不良反应,值得推广。