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Non-isothermal thermogravimetric investigation on mutual effect between bituminite and anthracite in blends for blast furnace injection

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Journal of Iron and Steel Research(International) 2019年第8期26卷 818-828页

作者： Yun-fei Wu Qing-hai Pang Zhi-jun He Teng-fei Song Wen-long Zhan Jun-hong Zhang School of Materials and Metallurgy University of Science and Technology Liaoning Anshan 114051 Liaoning China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

In order to clarify the mutual effect between bituminite and anthracite in blends during industrial combustion, the influence of particle size and heating rate as well as oxygen concentration in atmosphere was analyzed. The results of non-isothermal thermogravimetric analysis indicated that the combustion behavior of blends was of great difference though blends were prepared with the same volatile content of 20%. The catalysis of bituminite to anthracite changed with the thermal and kinetic condition of combustion reaction, and consequently, blends with different collocations were suitable for various combustion environments. Superior combustion properties of some blends were achieved at high heating rates, while others might react faster under high oxygen-enriched atmosphere. Simultaneously, the volume model and unreacted core model as well as random pore model were introduced to fit the experimental data. The kinetic calculation results showed that the combustion of blends at different heating rates all agreed better with that of random pore model in comparison with the other two models, while the apparent activation energy of samples all decreased with the increase in heating rate. The similarity of functional group structure between bituminite and anthracite is closely related to the accordance in com-bustion stage of bituminite and anthracite in blends.

关键词： Pulverized coal injection Coal blend mutual effect Kinetics Activation energy Bituminite Anthracite

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Fault monitoring based on mutual information feature engineering modeling in chemical process

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Chinese Journal of Chemical Engineering 2019年第10期27卷 2491-2497页

作者： Wende Tian Yujia Ren Yuxi Dong Shaoguang Wang Lingzhen Bu College of Chemical Engineering Qingdao University of Science&TechnologyQingdao 266042China

A large amount of information is frequently encountered when characterizing the sample model in chemical process.A fault diagnosis method based on dynamic modeling of feature engineering is proposed to effectively remove the nonlinear correlation redundancy of chemical process in this paper.From the whole process point of view,the method makes use of the characteristic of mutual information to select the optimal variable subset.It extracts the correlation among variables in the whitening process without limiting to only linear correlations.Further,PCA(Principal Component Analysis)dimension reduction is used to extract feature subset before fault diagnosis.The application results of the TE(Tennessee Eastman)simulation process show that the dynamic modeling process of MIFE(mutual Information Feature Engineering)can accurately extract the nonlinear correlation relationship among process variables and can effectively reduce the dimension of feature detection in process monitoring.

关键词： Big data Fault diagnosis mutual information TE process Process modeling

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The mutual interaction between the host spinal cord and grafted undifferentiated stem cells fosters the production of a lesion-induced secretome

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Neural Regeneration Research 2020年第10期15卷 1844-1845页

作者： Krisztián Pajer Tamás Bellák Antal Nógrádi Department of Anatomy Histology and Embryology Faculty of Medicine University of Szeged

Pathophysiology of spinal cord injury:Injury to the spinal cord results in loss of gray and white matter i.e.,it produces a segmental spinal cord lesion and,as a consequence leads to a fatal loss of motor,sensory and autonomic functions.Spinal cord injuries in humans and other mammals are not followed by the replacement of lost neurons and oligodendrocytes and regrowth of injured axons,instead they lead to permanent,fatal and incurable functional deficits.The primary physical injury is followed by a cascade of tissue-decaying events,called secondary injury,which leads to ischemia,vascular disruption,neuroinflammation,excitotoxicity,demyelination and death of neurons and glial cells(Silva et al.,2014;Figure 1A).The direct mechanical disruption of the vasculature results in the increased permeability of the blood-spinal cord barrier.Due to the leakiness of blood-spinal cord barrier and production of cytokines by activated microglia,a number of various immune cells(T lymphocytes,neutrophils and monocytes)invade the injury site.The macrophages generate a set of inflammatory cytokines such as tumor necrosis factor-α,interleukin(IL)-1α,IL-1β,and IL-6,which may further augment the secondary events(Ahuja et al.,2017).In addition,a number of other disruptive processes contribute to the heterogeneous and time-sensitive pathophysiology of spinal cord injury.

关键词： mutual Figure injuries

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Optical generation of tunable and narrow linewidth radio frequency signal based on mutual locking between integrated semiconductor lasers

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Photonics Research 2014年第4期2卷 11-17页

作者： Ning Zhang Xinlun Cai Siyuan Yu Department of Electrical and Electronic Engineering University of BristolBristol BS81UBUK State Key Laboratory of Optoelectronic Materials and Technology School of Physical Science and Engineering TechnologiesSun Yat-sen UniversityGuangzhou 510275China

An integrated on-chip optical device consisting of two distributed feedback(DFB)lasers and one multimode semiconductor ring laser(SRL)has been numerically investigated.In this optical circuit,the two DFB lasers are injected into the SRL,and with the presence of the four-wave mixing effect and optical feedback,the three semiconductor lasers achieve mutual-locking state.The beating between the output optical spectral lines can generate readily tunable radio frequency signals with high spectral purity.

关键词： tunable mutual locking

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Joint calibration algorithm for gain-phase and mutual coupling errors in uniform linear array

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Chinese Journal of Aeronautics 2016年第4期29卷 1065-1073页

作者： Li Weixing Lin Jianzhi Zhang Yue Chen Zengping Science and Technology on Automatic Target Recognition Laboratory National University of Defense Technology

The effect of gain-phase perturbations and mutual coupling significantly degrades the performance of digital array radar(DAR). This paper investigates array calibration problems in the scenario where the true locations of auxiliary sources deviate from nominal values but the angle intervals are known. A practical algorithm is proposed to jointly calibrate gain-phase errors and mutual coupling errors. Firstly, a simplified model of the distortion matrix is developed based on its special structure in uniform linear array(ULA). Then the model is employed to derive the precise locations of the auxiliary sources by one-dimension search. Finally, the least-squares estimation of the distortion matrix is obtained. The algorithm has the potential of achieving considerable improvement in calibration accuracy due to the reduction of unknown parameters. In addition,the algorithm is feasible for practical applications, since it requires only one auxiliary source with the help of rotation platforms. Simulation results demonstrate the validity, robustness and high performance of the proposed algorithm. Experiments were carried out using an S-band DAR test-bed.The results of measured data show that the proposed algorithm is practical and effective in application.

关键词： Calibration accuracy Digital array Gain and phase errors Least-squares mutual coupling Uniform linear array

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Two-frequency mutual coherence function and its applications to pulse scattering by random rough surface

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Science China(Physics,Mechanics & Astronomy) 2008年第2期51卷 157-164页

作者： REN YuChao GUO LiXin School of Science Xidian UniversityXi’an 710071China

An analytic expression of the two-frequency mutual coherence function (MCF) was derived for a two-dimensional random rough surface. The scattered field was cal-culated by the Kirchhoff approximation, which is valid in the case that the radius of curvature of the surface is much larger than the incident wave length. The scatter-ing problem of narrowband pulse was investigated to simplify the analytic expres-sion of the two-frequency MCF. Numerical simulations show that the two-frequency MCF is greatly dependent on the root-mean-square (RMS) height, while less de-pendent on the correlation length. The analytic solutions were compared with the results of Monte Carlo simulation to assess the accuracy and computational efficiency.

关键词： mutual coherence function pulse scattering random rough surface

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Adaptive Power Control for mutual Interference Avoidance in Industrial Internet-of-Things

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China Communications 2016年第S1期13卷 124-131页

作者： ZHENG Tao QIN Yajuan ZHANG Hongke KUO Syyen School of Electronics and Information Engineering Beijing Jiaotong University Department of Electrical Engineering National Taiwan University

With the vigorous development of the Internet of Things and 5G technology, such as machine-to-machine and device-todevice, all kinds of data transmission including environmental monitoring and equipment control strengthens the key role of wireless sensor networks in the large-scale wireless communication system. However, especially in the complex industrial wireless applications, the low utilization efficiency of the limited wireless radio resource enhances the coexistence problem between heterogeneous networks. In this paper, from the severe mutual interference point of view, a mathematical model regarding cumulative interferences in the industrial wireless sensor networks is described. Then, from the perspective of mutual interference avoidance, an adaptive power control scheme is proposed in order to handle the normal communication needs on both the primary link and the secondary link. At last, nonlinear programming is taken to solve the corresponding optimization problem. Some typical analyses are given to verify the effectiveness of the proposed scheme on optimizing the tradeoff between the system throughput and energy consumption. Especially, the energy-efficiency of the novel scheme for Industrial Internet of Things is also analysed. Results show that the proposed power control is efficient. The throughput could be enhanced and the energy consumption could be reduced with the guarantee of mutual interference avoidance.

关键词： industrial wireless sensor networks optimization power control mutual interference

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Strengthen cooperation and exchanges for mutual benefit and win-win achievement——Commemorating the 30th anniversary of friendship-city relations between Zhangzhou and Isahaya,Japan

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Voice of Friendship 2022年第1期 54-56页

作者： Lu Meilian 不详

The global pandemic will never hinder exchanges between international friendship cities,let alone their aspirations for communication.Under the strong guidance of the CPAFFC and the Fujian Foreign Affairs Office,the Z... 详细信息

关键词： anniversary mutual hinder

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A Novel Beam Design Method for mm Wave Multi-Antenna Arrays with mutual Coupling Reduction

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China Communications 2019年第10期16卷 37-44页

作者： Weizhi Zhong Lei Xu Qiuming Zhu Xiaomin Chen Jianjiang Zhou College of Astronautics Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

To overcome the mutual coupling (MC) of multiple antennas in millimeter wave (mmWave) communication systems, a novel beam design method with low complexity is proposed in this paper. Firstly, an equivalent channel model incorporating the effect of MC is analyzed and established, and then an optimal precoding / combiner vector for beamforming is derived. On this basis, by using greedy geometric (GG) algorithm, a novel hybrid beam design method is proposed. Finally, the performance of proposed method is analyzed and compared with other traditional ones. The simulation results show that the proposed method has better suppression of the MC effect as well as lower complexity.

关键词： millimeter wave (mmWave) antenna array beam design mutual coupling (MC) greedy geometric (GG) algorithm

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Belt and Road Cooperation: Boosting Exchange and mutual Learning among Civilizations

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中印对话（英文版） 2023年第3期 4-6页

作者： Yu Hongjun 不详

The five-pronged approach of the Belt and Road Initiative is key to mutual learning among civilizations today.It opens five major channels for countries with different cultures to achieve common progress.

关键词： Road mutual Belt

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