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关键词

多输入多输出 3

钢产量 2

5G 1

Al@AP/PVDF纳米复合材料 1

Doherty功率放大器；输出功率回退；输出阻抗；网络相位 1

GDP 1

Lipschitz非线性系统；动态输出反馈控制；事件触发控制；全局渐近稳定 1

MIMO雷达；波形设计；谱分解；分式二次约束二次规划 1

WiFi多频天线 1

“一带一路” 1

二维波达角估计；信道冲击响应估计；信号检测；均匀矩形阵列；大规模天线 1

互耦；多输入多输出；天线阵列；超表面；去耦 1

亚稳态分子间复合材料 1

仅有输出响应；系统模态参数识别；空间曲线拟合；频谱混叠 1

介质谐振器天线 1

倾斜镜；动态系统；输出输出耦合；物理建模；子空间辨识 1

内模动态 1

农业生态工程 1

分层空时码 1

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Enhancement of distillate output of double basin solar still with vacuum tubes

Hitesh N PANCHAL, P K SHAH

《能源前沿（英文）》 2014年第8卷第1期页码 101-109 doi: 10.1007/s11708-014-0299-5

摘要： The latent heat of condensation is lost to the atmosphere; hence it is not utilized to increase distillate output of single basin solar stills. This difficulty was overcome by attaching an additional basin to the main basin. The performance of the double basin solar still was also increased by attaching vacuum tubes to the lower basin; hence the lower basin possessed a higher temperature throughout the day. The latent heat of condensation of the bottom basin was also utilized to increase distillate. But the distillate output of the top basin was even lower compared with that of the bottom basin. This paper proposed a novel approach to increase the distillate output of the double basin solar still attached with vacuum tubes by introducing different sensible energy storage materials like pebbles, black granite gravel and calcium stones to increase the basin area. Experiments were conducted in climate conditions of Mehsana (23.6000° N, 72.4000° E) Gujarat from April to September 2013 with a constant water depth of 2 cm in the top basin with and without the use of basin materials. The results showed that the distillate output of basin material with calcium stones is greater (74%) compared with that of black granite gravel and pebbles. The integration of vacuum tubes with solar still greatly increases the distillate output of the solar still by providing hot water at the lower basin.

关键词： double basin solar still calcium stones pebbles granite gravel distillate output

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Performance analysis of solar still with cow dung cakes and blue metal stones

Hitesh N. PANCHAL

《能源前沿（英文）》 2015年第9卷第2期页码 180-186 doi: 10.1007/s11708-015-0361-y

摘要： The aims of this paper is to investigate the effects of various materials inside the solar still on the increase of the productivity of potable water. Here, blue metal stones and cow dung cakes were used as materials. To investigate their effect, three identical solar stills with an effective area of 1 m square made from locally available materials were tested in climate conditions of Mehsana (23°50′ N 72° 23′). The first and second solar stills were filled with blue metal, stones and cow dung cakes, while the third one was taken as a reference which consisted of only blue paint at the basin. The experiments show that blue metal stones have the highest distillate output at daytime, followed by cow dung cakes solar still and reference solar still. On the other hand, the overall distillate output of blue metal stones and cow dung cakes at daytime as well as at night were 35% and 20% compared with that of reference solar still.

关键词： blue metal stones cow dung cakes distillate output solar still solar intensity

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Modeling and analysis of controllable output property of cantilever-beam inertial sensors based on magnetic

Guixiong LIU, Peiqiang ZHANG, Chen XU

《机械工程前沿（英文）》 2009年第4卷第2期页码 129-133 doi: 10.1007/s11465-009-0035-8

摘要： Magnetic fluid is first introduced into the traditional cantilever-beam senor. Based on the property of the cantilever-beam and the novel controllable mag-viscosity of magnetic fluid, the output of cantilever-beam sensors is under control so that the controllable output of the sensors can be realized. The mathematical model of the sensors is established and analyzed. The dynamic control function and the following educational results, which include the two curves of the displacement ratio and phase function with the different damping ratio and frequency ratio, are obtained based on the model. The result shows that it is valid to realize the controllable output of the sensors by controlling the viscosity of the magnetic fluid, and finally the expanded measurement range can be realized.

关键词： sensors magnetic fluid property of mag-viscosity controllable output

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Cutting CO emissions through demand side regulation: Implications from multi-regional input–output linear

《工程管理前沿（英文）》页码 452-461 doi: 10.1007/s42524-022-0209-1

摘要： This study combines multi-regional input–output (MRIO) model with linear programming (LP) model to explore economic structure adjustment strategies for the reduction of carbon dioxide (CO₂) emissions. A particular feature of this study is the identification of the optimal regulation sequence of final products in various regions to reduce CO₂ emissions with the minimum loss in gross domestic product (GDP). By using China’s MRIO tables 2017 with 28 regions and 42 economic sectors, results show that reduction in final demand leads to simultaneous reductions in GDP and CO₂ emissions. Nevertheless, certain demand side regulation strategy can be adopted to lower CO₂ emissions at the smallest loss of economic growth. Several key final products, such as metallurgy, nonmetal, metal, and chemical products, should first be regulated to reduce CO₂ emissions at the minimum loss in GDP. Most of these key products concentrate in the coastal developed regions in China. The proposed MRIO–LP model considers the inter-relationship among various sectors and regions, and can aid policy makers in designing effective policy for industrial structure adjustment at the regional level to achieve the national environmental and economic targets.

关键词： CO₂ emissions demand side regulation multi-regional input–output model linear programming model

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Estimation of regional physical imports and exports of EW-MFA in China using monetary input-output tables

Nan LI, Tianzhu ZHANG

《环境科学与工程前沿（英文）》 2013年第7卷第2期页码 242-254 doi: 10.1007/s11783-012-0443-6

摘要： Given the statistical gaps in material flow among provinces in China, a method was introduced to estimate regional physical imports and exports (RPIE), which includes international and interregional imports/exports. This method uses provincial monetary input-output tables (MIOT) and international trade statistics. A coefficient matrix representing correlations between monetary value and physical mass for years 2000–2009 was obtained based on a detailed commodity classification and 22 material production sectors in MIOT. With the coefficient matrix as reference, RPIE was measured. Pilot calculation of both regional physical trade balance and domestic material consumption, as well as a brief analysis of these methods, were conducted using 2002 data.

关键词： economy-wide material flow accounts (EW-MFA) monetary input-output table (MIOT) regional physical imports and exports estimation

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Investigation on the integral output power model of a large-scale wind farm

BAO Nengsheng, MA Xiuqian, NI Weidou

《能源前沿（英文）》 2007年第1卷第1期页码 67-78 doi: 10.1007/s11708-007-0006-x

摘要： The integral output power model of a large-scale wind farm is needed when estimating the wind farm s output over a period of time in the future. The actual wind speed power model and calculation method of a wind farm made up of many wind turbine units are discussed. After analyzing the incoming wind flow characteristics and their energy distributions, and after considering the multi-effects among the wind turbine units and certain assumptions, the incoming wind flow model of multi-units is built. The calculation algorithms and steps of the integral output power model of a large-scale wind farm are provided. Finally, an actual power output of the wind farm is calculated and analyzed by using the practical measurement wind speed data. The characteristics of a large-scale wind farm are also discussed.

关键词： power model actual energy large-scale practical measurement

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Tracking control of robot manipulators via output feedback linearization

FEI Yue-nong, Wu Qing-hua

《机械工程前沿（英文）》 2006年第1卷第3期页码 329-335 doi: 10.1007/s11465-006-0034-y

摘要： This paper presents a robot manipulator tracking controller based on output feedback linearization. A sliding mode perturbation observer (SPO) is designed to estimate unmeasurable states and system perturbations that involve system nonlinearities, disturbances and unmodelled dynamics. The use of SPO allows to input/output linearize and decouple the strongly coupled nonlinear robot manipulator system merely by the feedback of joint angles. The controller design does not need an accurate model of the robot manipulator. Simulation studies are undertaken based on a two-link robot manipulator to evaluate the proposed approach. The simulation results show that the proposed controller has more superior tracking control performance, with payload changing in a wide range, in comparison with a sliding mode controller (SMC) designed based on state feedback linearization with full states available.

关键词： available comparison unmeasurable nonlinear perturbation observer

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钢产量增长机制的解析及2000—2007年我国钢产量增长过快原因的探索

陆钟武,岳强

《中国工程科学》 2010年第12卷第6期页码 4-11

摘要：

分两步解析钢产量的增长机制，首先在若干假设条件下提出了钢产量增长的基准模式，其主要特点是钢产量与GDP同步增长，分析了基准模式下的钢产量、在役钢量、GDP以及它们的年增长率；然后讨论偏离基准模式的各种可能性，及其对钢产量增速的影响。在此基础上得到了钢产量年增长率的基本计算式。分析了偏离基准模式对单位GDP钢产量的影响。在对钢产量增长机制进行解析的基础上，广泛联系全社会发生的各种现象，提出使我国钢产量增速远远超过GDP增速的16种现象，提出在宏观调控工作中，要区别对待这些现象。从中、日、美三国单位GDP钢产量数据对比可见，我国降低单位GDP钢产量的空间很大。文章为我国钢铁行业的宏观调控提供了新思路。

关键词：钢产量在役钢量 GDP 年增长率机制基准模式

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论单位生产总值钢产量及钢产量、钢铁行业的能耗、物耗和排放

陆钟武,岳强,高成康

《中国工程科学》 2013年第15卷第4期页码 23-29

摘要：

单位生产总值钢产量指标对于调控钢产量，开展钢铁行业的节能、降耗和减排工作具有重要意义。首先给出了单位生产总值钢产量定义式，引入了“在役钢量”概念及其计算式；然后对单位GDP钢产量的定义式进行了两次变换，导出具有分析功能的新定义式；并以新定义式和钢产量计算式、钢铁行业能耗、物耗和排放计算式为依据，对钢产量及钢铁行业的能耗、物耗和排放进行了分析；最后，进行了与钢铁行业相关各参数的分类，并提出全面推进钢铁行业节能、降耗、减排工作的总体看法。

关键词：单位生产总值钢产量钢产量在役钢单位在役钢GDP 能耗

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具有极点区域约束的广义模糊系统的输出反馈控制

高丹,曹媛媛

《中国工程科学》 2006年第8卷第4期页码 63-67

摘要：

针对模糊广义系统，将动态输出反馈控制器设计问题转化为一组矩阵不等式的可行解问题，使得闭环系统不仅具有鲁棒性能，而且能把闭环系统极点配置在一个给定的圆形区域内，从而保证系统具有期望的动态性能。

关键词：模糊广义系统动态输出反馈线性矩阵不等式

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一种扩展非对称Doherty功率放大器输出功率回退范围的新方法 Research Article

李明玉1,程小兵1,代志江1,钟康1,蔡天赋1,黄超意2

《信息与电子工程前沿（英文）》 2023年第24卷第3期页码 470-479 doi: 10.1631/FITEE.2200250

摘要：提出一种扩展Doherty功率放大器（DPA）输出功率回退（OPBO）范围的新方法。研究表明，可以通过峰值路功放的输出阻抗来调整和改变载波功率放大器输出匹配网络的相位，来扩大DPA的输出功率回退量。基于此理论，设计了一个工作频带为1.55—2.2 GHz（35%相对带宽）、具有大输出功率回退范围的高效率非对称DPA，通过这一例子来验证所提方法的有效性。实验结果表明，DPA工作频率为1.6—2.1 GHz。OPBO状态下测量效率范围为42.2%—52.1%，饱和状态下为47%—62.7%。OPBO范围为11.1—13.2 dB。

关键词： Doherty功率放大器；输出功率回退；输出阻抗；网络相位

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农业生态工程中人工辅助能产投比的计算分析研究

卞有生,柳英昆,卞晶

《中国工程科学》 2006年第8卷第8期页码 28-32

摘要：

人工辅助能产投比的高低从总体上反映了农业生态系统的功能和生产效率，是系统结构功能的体现，是评价农业生态工程的重要指标。文章以河南新县10户农民为案例，具体介绍了人工辅助能产投比的计算研究方法，并报告了连续3年的研究结果。

关键词：农业生态工程能量产投比

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一类Lipschitz非线性系统的事件触发动态输出反馈控制 Research Article

刘智倩,楼旭阳,贾佳佳

《信息与电子工程前沿（英文）》 2022年第23卷第11期页码 1684-1699 doi: 10.1631/FITEE.2100552

摘要：

本文研究一类Lipschitz非线性系统的动态输出反馈控制问题。首先，针对该系统设计了一个连续时间控制器，并且给出了系统稳定的充分条件。其次，针对该Lipschitz非线性系统提出一种新的事件触发机制，在该触发机制中引入了新的事件触发条件，并构建了事件触发控制下的闭环混杂系统。在混杂系统框架下建立了闭环系统稳定的充分条件。此外，给出了最小事件间隔的上界，以避免Zeno现象。最后，通过在神经网络系统和基因调控网络系统中的数值仿真验证了理论结果及所提方法的优越性。

关键词： Lipschitz非线性系统；动态输出反馈控制；事件触发控制；全局渐近稳定

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多重受限时滞逻辑控制网络的输出跟踪 Research Articles

Ya-ting ZHENG, Jun-e FENG

《信息与电子工程前沿（英文）》 2020年第21卷第2期页码 316-323 doi: 10.1631/FITEE.1900376

摘要：本文深入研究具有状态和控制受限的时滞逻辑控制网络的输出跟踪问题。与其他类型时滞相比，状态依赖型时滞数值的更新依赖当前的状态值和一个伪逻辑函数。多重受限意味着状态的取值局限在一个给定的非空集合以及控制器的设计有条件限定。采用矩阵半张量积方法将动态方程转化为代数形式，进而构造一个等价扩维系统。基于该扩维系统，输出跟踪问题被转化为集合镇定问题。利用变换的状态转移矩阵，可得到该系统实现输出跟踪的充分必要条件，通过数学软件容易验证此条件。此外，设计了状态反馈控制器使时滞逻辑控制网络的输出能跟踪参考信号。最后，通过一个例子验证本文的理论结果。

关键词：逻辑控制网络；多重受限；输出跟踪；镇定；状态依赖型时滞；半张量积

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基于网络结构的布尔网络输出反馈镇定器设计 Research Articles

Jie ZHONG, Bo-wen LI, Yang LIU, Wei-hua GUI

《信息与电子工程前沿（英文）》 2020年第21卷第2期页码 247-259 doi: 10.1631/FITEE.1900229

摘要：在基因调控网络中，稳态结构可以用来表示细胞死亡或基因不受调控生长的进化行为。本文利用矩阵半张量积工具，分析与研究布尔网络输出反馈镇定器的设计。基于描述节点间耦合关系的网络结构信息，设计了输出反馈镇定器以实现全局稳定。与传统牵制控制器设计相比，输出反馈镇定器设计不再基于布尔网络的状态转移矩阵，可以有效确定牵制节点，降低计算复杂度。本文所提方法有效避免了计算2n×2n维的状态转移矩阵，这里n是布尔网络的节点数。最后，分别在一个信号转导网络和一个黑腹果蝇极性基因网络进行仿真模拟，证明该方法有效。结果表明，与传统布尔网络牵制控制相比，该方法更为简单、简洁。

关键词：布尔网络；输出反馈镇定器；网络结构；矩阵半张量积

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标题作者时间类型操作

Enhancement of distillate output of double basin solar still with vacuum tubes

Hitesh N PANCHAL, P K SHAH

期刊论文

Performance analysis of solar still with cow dung cakes and blue metal stones

Hitesh N. PANCHAL

期刊论文

Modeling and analysis of controllable output property of cantilever-beam inertial sensors based on magnetic

Guixiong LIU, Peiqiang ZHANG, Chen XU

期刊论文