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基于双CPU结构的数据监控系统设计

贾贵玺,齐乐

《中国工程科学》 2006年第8卷第4期页码 68-71

摘要：

针对通信系统中，对所有客户线路的电压、电流、温度等数据进行实时多路采集监控，提出了一种基于双CPU结构的数据监控系统的设计方法以及硬件组成。讨论了系统主要芯片之间的连线方法以及软件流程。实践证明，双CPU设计方案不仅满足了系统高运算量、高实时性、抗干扰性要求，而且优化了软硬件设计。

关键词：数据监控双CPU 双口RAM

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锥形凹模缩口力的理论计算与试验验证

胡成武,罗文波,彭炎荣

《中国工程科学》 2005年第7卷第6期页码 54-56

摘要：

缩口力是导致薄壁筒形件缩口失稳的重要因素。为了提高缩口力的计算精度，M·B·斯德洛日夫和E·π·翁克索夫综合考虑板厚变化、加工硬化及磨擦等因素的影响，分别提出了圆筒形件缩口力的计算方法

关键词：缩口力理论计算试验验证

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Reactive power deployment and cost benefit analysis in DNO operated distribution electricity markets with D-STATCOM

Atma Ram GUPTA,Ashwani KUMAR

《能源前沿（英文）》 2019年第13卷第1期页码 86-98 doi: 10.1007/s11708-017-0456-8

摘要： The aim of this paper is to analyze unbalanced radial distribution systems (UBRDS) with the distribution static compensator (D-STATCOM). The main objectives of this paper are D-STATCOM allocation in UBRDS with an objective of providing reactive power support to enhance voltage profile and reduce line losses of the distribution network, determination of optimal D-STATCOM rating subjected to minimization of total cost, and impact of D-STATCOM placement on improving power factor and savings in cost of energy loss. The analysis is conducted on a large industrial load model with light, medium and high loading scenarios. Further, the impact of load growth is also considered for better planning of the power distribution system. The results are obtained on standard 25-bus UBRDS to check the feasibility of the proposed methodology.

关键词： unbalanced distribution system D-STATCOM voltage sensitivity index load models load growth distribution network operator (DNO)

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一种快速精确触觉碰撞检测中接触细节层次控制方法 Article

A Ram CHOI, Sung Min KIM, Mee Young SUNG

《信息与电子工程前沿（英文）》 2017年第18卷第8期页码 1117-1130 doi: 10.1631/FITEE.1500498

摘要：为实现精确稳定的触觉再现，包围体积（球体、轴对称包围盒、定向包围盒或多面体）必须尽可能紧密地填充或覆盖目标对象，来完成交互式触觉应用中的碰撞检测。本文提供了一种方法，用于创建与接触细节层次（contact levels of details, CLOD）相关的包围球体。该球体与目标对象相配合的同时，还能平衡碰撞检测的速度与精确性。所提出的方法主要包括包围球体成形以及两级碰撞检测两部分。进一步说，包围球体成形可分为2步：创建球体和聚类球体；两级碰撞检测也包括2个阶段：球体的快速检测以及精确检测。首先，通过包围球体的创建实现球体碰撞检测中的初始快速探测。一旦探测到碰撞，可通过检查碰撞边界内网格与触觉点的间距来实现更精确的检测效果。为实现这种精细层级的检测，需要定义一种特殊的包围体积数据结构来囊括球体内的全部网格信息。我们通过一系列实现检验了所提出方法的有效性和性能表现，结果表明所提出算法的速度和精确度可以满足触觉仿真的需要。通过球体聚类来保证检测速度，通过基于体素的直接碰撞检测来保证检测精确度。通过基于距离的聚类，所提出的方法在CLOD方面仍保持了其独创性。

关键词：碰撞检测；触觉再现；包围球体；聚类；接触细节层次

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N95口罩重复使用

Dana Mackenzie

《工程（英文）》 2020年第6卷第6期页码 593-596 doi: 10.1016/j.eng.2020.04.003

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Design of nanocarriers for efficient cellular uptake and endosomal release of small molecule and nucleic acid drugs: learning from virus

Vaibhav Mundra, Ram I. Mahato

《化学科学与工程前沿（英文）》 2014年第8卷第4期页码 387-404 doi: 10.1007/s11705-014-1457-3

摘要： There are many challenges in developing efficient and target specific delivery systems of small molecule and nucleic acid drugs. Cell membrane presents one of the major barriers for the penetration of hydrophilic macromolecules across the plasma membrane. Nanocarriers have been designed to enhance their cellular uptake via endocytosis but following their cellular uptake, endosomal escape is the rate limiting step which restricts the value associated with the enhanced uptake by nanocarriers. Viruses are an excellent model for efficient cytosolic delivery by nanocarriers. Viruses exploit intracellular cues to release the genome to cytosol. In this review, we first discuss different endocytic uptake pathways and endosomal escape mechanisms. We then summarize the existing tools for studying the intracellular trafficking of nanocarriers. Finally, we highlight the important design elements of recent virus-based nanocarriers for efficient cellular uptake and endosomal escape.

关键词： nanocarrier cellular uptake endosomal release nucleic acid drug

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使用猫群算法优化线性天线阵列的最佳阵因子辐射方向图：电磁仿真验证 Article

Gopi RAM, Durbadal MANDAL, Sakti Prasad GHOSHAL, Rajib KAR

《信息与电子工程前沿（英文）》 2017年第18卷第4期页码 570-577 doi: 10.1631/FITEE.1500371

摘要：本研究进行了微带贴片天线线性阵列的优化设计。通过猫群算法（Cat swarm optimization, CSO）优化天线阵列辐射方向图的各控制参数。通过优化每个单元的激励电流权重和阵元间隙获得各向同性天线单元阵列的最佳辐射方向图。以12、16和20单元的天线阵列为例，运用MATLAB进行阵列优化设计，采用CST-MWS对设计结果进行仿真验证。由仿真结果可见，CSO能给出微带贴片天线线性阵列的最优设计。

关键词：贴片天线；线性天线阵列；猫群优化（CSO）；旁瓣水平（SLL）

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Planet position errors in planetary transmission: Effect on load sharing and transmission error

Miguel IGLESIAS, Alfonso FERNáNDEZ, Ana DE-JUAN, Ramón SANCIBRIáN, Pablo GARCíA

《机械工程前沿（英文）》 2013年第8卷第1期页码 80-87 doi: 10.1007/s11465-013-0362-7

摘要：

In this paper an advanced model of spur gear transmissions developed by the authors is used to study the influence of carrier planet pin hole position errors on the behaviour of the transmission. The model, initially conceived for external gear modeling, has been extended with internal meshing features, and thus increasing its capabilities to include planetary transmission modeling. The new features are presented, along with the summary of the model general approach. The parameters and characteristics of the planetary transmission used in the paper are introduced. The influence of carrier planet pin hole position errors on the planet load sharing is studied, and several static cases are given as examples in order to show the ability of the model. Tangential and radial planet pin hole position errors are considered independently, and the effect of the load level is also taken into account. It is also given attention to the effect on the transmission error of the transmission. Two different configurations for the planetary transmission are used, attending to the fixed or floating condition of the sun, and the differences in terms of load sharing ratio are shown.

关键词： gear planetary epicyclic transmission load sharing transmission error

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Evaluation of SWAT sub-daily runoff estimation at small agricultural watershed in Korea

Ganga Ram Maharjan, Youn Shik Park, Nam Won Kim, Dong Seok Shin, Jae Wan Choi, Geun Woo Hyun, Ji-Hong

《环境科学与工程前沿（英文）》 2013年第7卷第1期页码 109-119 doi: 10.1007/s11783-012-0418-7

摘要： A study was undertaken for the prediction of runoff flow from 0.8 ha field-sized agricultural watershed in South Korea using Soil and Water Assessment Tool (SWAT) sub-daily. The SWAT model with sub-daily configuration predicted flow from the watershed within the range of acceptable accuracy. The SWAT sub-daily simulations were carried out for a total of 18 rainfall events, 9 each for calibration and validation. Overall trend and extent of matching simulated flow for the rainfall events in 2007-2008 with measured data during the calibration process were coefficient of determination ( ) value of 0.88 and Nash and Sutcliffe Efficiency ( ) value of 0.88. For validation, and values were 0.9 and 0.84, respectively. Whereas and values for simulation results using daily rainfall data were 0.79 and -0.01, respectively, that were observed to be out of acceptable limits for the model simulation. The importance of higher time resolution (hourly) precipitation records for flow simulation were evaluated by comparing and with 15 min, 2 h, 6 h and 12 h precipitation data, which resulted in lower statistics with increases in time resolution of precipitation data. The SWAT sub-daily sensitivity analysis was performed with the consideration of hydraulic parameter and was found as in the rank order of CN2 (curve number), ESCO (soil evaporation compensation factor), GW_DELAY (ground water delay time), ALPHA_BF ( base flow alpha factor), GWQMN ( a threshold minimum depth of water in the shallow aquifer required for return flow to occur) , REVAPMN (minimum depth of water in shallow aquifer for re-evaporation to occur) , LAT_TIME (lateral flow travel time) respectively. These sensitive parameters were evaluated at 10% higher and lower values of the parameters, corresponding to 70.5% higher and 23.2% lower in simulated flow out from the SWAT model. From the results obtained in this study, hourly precipitation record for SWAT sub-daily with Green-Ampt infiltration method was proven to be efficient for runoff estimation at field sized watershed with higher accuracies that could be efficiently used to develop site-specific Best Management Practices (BMPs) considering rainfall intensity, rather than simply using daily rainfall data.

关键词： Soil and Water Assessment Tool (SWAT) sub-daily simulation runoff rainfall

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一种低剖面双极化可编程双波束扫描天线阵列 Perspective

朱世超,宁远帆,褚宏波,肖培,李高升

《信息与电子工程前沿（英文）》 2023年第24卷第10期页码 1504-1512 doi: 10.1631/FITEE.2300253

摘要：提出一种基于全息控制理论的低剖面双极化双波束扫描天线阵列。巧妙设计辐射单元，以通过控制集成在每个单元上的PIN二极管的状态实现可重构极化和辐射相位调制。

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三塔双跨悬索桥动力特性分析

阮静,马如进

《中国工程科学》 2010年第12卷第8期页码 83-87

摘要：

桥梁结构的动力特性对进行桥梁的动力性能设计、健康检测和维护具有十分重要的意义，而三塔双跨悬索桥具有和传统的大跨径悬桥不完全相同的静、动力性能针对泰州大桥工程实例，通过ANSYS有限元分析软件研究了三塔双跨悬索桥在成桥阶段和施工阶段的动力特性，并与传统的悬索桥作比较，得出了一些有意义的结论，供工程设计人员参考。

关键词：三塔双跨悬索桥动力特性自振频率振型

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循环双谱及在周期平稳类故障中的应用

苏中元,贾民平,许飞云,胡建中

《中国工程科学》 2006年第8卷第9期页码 57-60

摘要：

论述了未知循环频率的周期平稳信号循环双谱的估计方法；研究了在循环双谱的循环累积量计算中涉及变量的简化存储方法，提出了该变量矩阵是对称阵，通过算法可以三角阵的元素来表述，克服了循环双谱传统估计方法计算量较大的缺陷，提高了运算效率；提出了循环双谱对调相故障信号的分析能力，以及对加性噪声的处理能力，仿真并验证了该方法的有效性，并将其应用于旋转机械状态分析。

关键词：周期平稳循环双谱滞后积

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使用串行外设接口协议的混沌数字加密系统及其dsPIC实现 None

Rodrigo MÉNDEZ-RAMÍREZ, Adrian ARELLANO-DELGADO, César CRUZ-HERNÁNDEZ, Fausto ABUNDIZ-PÉREZ, Rigoberto

《信息与电子工程前沿（英文）》 2018年第19卷第2期页码 165-179 doi: 10.1631/FITEE.1601346

摘要：当前数字通信的大规模使用需要嵌入式系统（embedded system，ES）和协议级数据加密来实现安全连接。串行外设接口（serial peripheral interface，SPI）协议被ES和集成电路制造商广泛应用于有线和无线通信等领域。提出一种应用于SPI通信协议的混沌加密和解密算法的设计及其实验实现。混沌加密算法及对应解密算法的设计基于混沌Hénon映射和两种模糊和排列方法（结合DNA序列）。考虑到对称密钥，SPI协议采用16位配置作为同步发射机和接收机。使用两个低成本dsPIC微控制器作为ES，设计结果得到实验验证。基于其数字信号处理属性，SPI数模转换器被用于处理、获取和重构机密消息。最后，统计检验证明了加密的安全性。该算法数字处理能力得到dsPIC微控制器验证。

关键词：混沌系统；统计测试；嵌入式系统；dsPIC微控制器；串行外设接口（SPI）协议

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双光梳测距 Review

朱泽斌, 吴冠豪

《工程（英文）》 2018年第4卷第6期页码 772-778 doi: 10.1016/j.eng.2018.10.002

摘要：新兴的双光梳测距系统可以利用其相位分辨能力和频率准确性实现高精度及快速距离测量。利用两台相干的光频梳，双光梳测距系统能够实现时间信息和相位信息的快速响应，突破了传统测距系统中的响应带宽、非模糊距离、动态测量等方面的限制。本文介绍了双光梳测距系统，总结归纳了实现该测距系统的关键技术。随着光频梳技术的发展和成熟，双光梳测距系统将有希望展开各种专业应用。

关键词：测距双光梳干涉仪相位噪声时间抖动紧密锁定后校正算法