bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tetraphenylethenyl-Modified 1,8-Naphthalimide Dye with Efficient Aggregation-Enhanced Emisssion, Solvatochromism and Intramolecular Charge Transfer Characteristics
Authors: Zhao Qiuli , Yang Qinghao 
Published: December 2021

Abstract
1,8-naphthalimide (NI) dyes are one class of important organic luminophores with good photo-stability, high fluorescent quantum yields and broad emission color-tunability, which are widely used in biological and chemical fields. However, they exhibit bad ACQ property, which heavily limits their application in real word. Contrary to ACQ, tetraphenylethene (TPE) is an AIE luminogen. To eliminate the ACQ effect of NI, TPE was used as core and NI chromophores was used as peripheries to obtain a new dye TPEDNI. TPEDNI dye demonstrates typical aggregation-enhanced emission (AEE) characteristic with high fluorescence
Φ>F, solid up to 100% in the film state, which is 24 times of that for its THF solution. Besides, TPEDNI exhibits marked solvatochromism, and the emission peak red-shifts from 505 nm in hexane to 610 nm in acetonitrile. TPENI also displays evident intramolecular charge transfer property in THF/water mixtures
Nondestructive Measurement for Front Facet Temperature of Semiconductor Lasers
Authors: Ni Yijia , Feng Shiwei , Lu Xaozhuang , Bai Kun , Zhang Yamin , Pan Shijie , Li Xuan 
Published: December 2021

Abstract
A convenient, simple method is proposed to measure the front facet temperature, which is the highest temperature in the semiconductor laser diode (LD), of a GaAs-based laser by employing thermoreflectance technique. Using an optical system featured in fiber connection, we measured the facet reflectivity of the 808-nm AlGaInAs/AlGaAs LD, which gives information about the temperature of the output facet. The fiber system operates at the wavelength of 1550 nm which avoids the absorption of the probe beam by the tested LD and consists of a fiber-coupled 1550 nm laser illuminant and photodiode. All optical elements in the system are connected by the fibers. The current signal collected from the photodiode is related to the facet reflectivity and represents facet temperature. We compared the facet temperatures determined by thermoreflectance technique with the cavity temperature obtained by forward-voltage method and found that the former is as much as three times as the latter.
Analysis on Spectral Matching of Biochemical Component for Rice
Authors: Tang Tianyu , Tang Yanlin , Wei Xiaonan 
Published: December 2021

Abstract
The protein, starch and amylose are three important indexes to characterize rice quality. The starch, crude protein and amylose of rice were extracted by experiments. The hyperspectral reflectance of starch, crude protein and amylose, their mixed samples and rice samples were determined by a ASD FieldSpec Pro FR™ The spectral characteristics of starch, crude protein, amylose and their correlation with component content were analyzed by using spectral matching technique and multivariate statistical method. The results showed that the spectra of three biochemical components were significantly different, and the spectral peaks and valleys of the mixed samples showed “red shift” or “blue shift”. The contents (%) of crude protein, starch and amylose in rice flour were significantly related to the absorption area S between 2020nm and 2235nm on their spectral curve. The results showed that the hyperspectral method could be used to estimate the contents of crude protein, starch and amylose content in rice, and then to detect rice quality.
Control strategy of optimal distribution of feet forces for quadruped robots based on virtual model
Authors: Chen Xinjie , Tan Yuegang , Li Ruiya , Mei Yecheng 
Published: December 2021

Abstract
In order to improve the dynamic walking performance of quadruped robot, a control method of optimizing feet forces distribution based on virtual model is proposed. In the supporting phase, the virtual model control method is applied to solve the virtual force of the torso. Combined with the gravity of the center of mass (CoM), the distribution problem between the virtual force of the CoM and the feet forces of the supporting legs is transformed into a quadratic programming (QP) problem, which is solved by Gurobi to realize the optimal distribution of the feet forces. Similarly, the virtual force of the swinging leg is solved by using the virtual model, and the joints torques of the robot’s swinging legs are obtained by combining the inverse dynamics feedforward of the swinging legs. Through the simulation of quadruped robot’s trot gait walking by webots and vs2019, it is verified that this method can stabilize the robot’s attitude angles and body speeds near the target values. Compared with the feet forces distribution method that abandons the lateral force control, the application of this method makes the fluctuation range of the attitude angles of the robot and the ground reaction forces (GRFs) of the supporting legs smaller. It is proved that this control method can effectively improve the walking stability and robustness of the quadruped robot.
Gear tooth breakage analysis based on multi-order modulated sideband RMS trending method
Authors: Chen Jian'gang , Luo Zhi , Wu Ronggen , Cai Haiyang 
Published: December 2021

Abstract
The fault characteristic signal energy for early gear tooth breakage is relatively weak and easily drowned by other signals, which is not conducive to the study of the fault development stage. A multi-order modulated sideband RMS (Root Mean Square) trend analysis method is proposed to analyse the development trend of the broken gear fault characteristics. By using this method to analyse gear breakage faults, the multi-order modulated sideband RMS trend analysis method can effectively determine the fault deterioration and fault stabilisation stages.
Design of High Distance Diameter Ratio Wireless Transmission System Based On LCC-S Compensation Network
Authors: Yang Aiwei , Xie Wei , Liu Tao , He Xiaobin 
Published: December 2021

Abstract
A wireless power transmission system based on LCC-S compensation network is designed. The transmission system is composed of power frequency power supply, LCC-S compensation resonant converter and DC/DC converter, and the output power supply for the battery system. Through the design of transmission coil and compensation network parameters, zero current input is realized. A wireless transmission coil with outer diameter of 47cm and spacing of 30cm is designed. A 2kW wireless transmission system prototype is built. Under 311V input, the actual transmission efficiency of high frequency inverter/wireless transmission/high frequency rectifier reaches 88.5%, and the wireless energy transmission with high distance to diameter ratio is realized.
Layout Guide for Design of a Novel Wheelchairs with Circumferential Linkage using Microsoft Word
Authors: Zhao Zhilin 
Published: December 2021

Abstract
In recent decades, the aging of the world’s population has intensified, and the number of people with disabilities caused by various disasters and diseases has gradually increased. Most of the elderly, frail and disabled people will choose wheelchairs as their means of transportation. However, ordinary wheelchairs are unable to climb stairs, especially in cities, which seriously limits the range of activities of wheelchair users and affects their daily life. Hence, it is of great significance and value to design an intelligent building climbing wheelchair with appropriate price, stability and safety. This paper designs a multi-functional planetary height adjustable building climbing wheelchair with simple structure and low price. Firstly, a multi-functional building climbing wheelchair based on planetary gear train is designed by using modular design idea, including ground walking mechanism, in place steering mechanism, center of gravity adjustment mechanism and Seat leveling mechanism. The working principle and design characteristics of each mechanism are analyzed in detail. Then, through the analysis of the mathematical model of the climbing mechanism, the dimensional parameters of the three-star wheel set are determined. According to the power demand of wheelchair, the power system is selected and analyzed. It provided a new possibility for the wheelchair application and also for those in need.
Design and Implementation of an Augmentative and Alternative Communication System Based on MATLAB GUI
Authors: Wang Zihe , Si Boyu , Wang Jingwen 
Published: December 2021

Abstract
In clinical practice, augmentative and alternative communication (AAC) is an effective training tool to improve the communication skills of individuals with language impairment, hearing impairment, and autism. However, there are few studies on the development of augmentative communication systems based on Mandarin Chinese in China. This study presents an augmentative communication system developed using the MATLAB GUI platform. The system consists of two parts: a learning part and a communication part, where the learning part provides the basis of the vocabulary content for the system, covering 5558 words, and its content is mainly a word list designed based on the content of special school language textbooks. The communication part provides the system with a complete discourse training content, mainly by arranging and combining the vocabulary content of the learning part to form a complete discourse. This aided communication system can expand the vocabulary of people with language expression disorders and improve their social communication skills. In addition, the effectiveness of the system was tested in a single-subject experiment, and the results showed that the augmentative communication system is effective in learning pronunciation, expanding vocabulary, and improving the social communication.
Automatic Assembly of Bolts and Nuts Based on Machine Vision Recognition
Authors: He Haocheng 
Published: December 2021

Abstract
In this study, based on the computer vision technology, we developed a recognition system for nuts positioning to complete the automatic bolt assembly part of the automatic production line. The actual image of the nut was captured by an industrial camera, which would be processed by the following edge detection and Hough circle transformation. After that, the coordinates of the nuts were obtained in the pixel scale. Finally, the real position of nuts would be fed back to the robot arm, according to which the automatic assembly of the bolt would be completed. This computer vision based recognition system is an indispensable part for the efficiency and accuracy improvement of automatic production line.
Realization and optimization of a new spike detection algorithm logic circuit
Authors: Gao Yuefeng , Liu Qingxing , Ye Hengji 
Published: December 2021

Abstract
At present, artificial intelligence has increasingly become the most promising and essential major. The interdisciplinary cooperation between the integrated circuit and artificial intelligence brings infinite possibilities. In the convolutional neural network area, in order to achieve the valuable output, the comparison between values is often encountered. The output is obtained by comparison between the result after the convolution calculation with the designed threshold. Therefore, our team not only design a 4-bit binary comparator hardware logic circuit to complete the task but also discuss and verify the feasibility and performance characteristics of the program from the perspective of energy and time delay. As for the overall framework, we design a convenient circuit that converts the complement code into the original code and chooses a CLA adder to accomplish this part. Using this kind of adder can ideally help us reduce the time delay at the expense of a complicated circuit schematic. In the comparator part, we design a high-quality circuit framework. The strategy of our circuit is to compare the relationship between the four-bit binary code and the threshold bit by bit from MSB to LSB, which performs better than the original 4-bit comparator, and we design two outputs that can legibly illustrate the relationship between two values. We use logic effort to discuss the normalized delay in our project. Besides, we find the connection between the energy and the delay by calculation. Finally, we design a trade-off function to make the optimization of energy and delay together with respect to voltage.
Design and Application of Automatic Calibration Device for Multi-Channel Resistance Strain Gauge Indicator
Authors: Hu Xiaoyin , Li Ye , Zhang Haoyu , Yu Yueling , Kang Zhangyi 
Published: December 2021

Abstract
In this paper, an automatic calibration device for multi-channel resistance strain gauge indicator is designed and its applicability and measurement accuracy are verified at laboratory. The calibration done by original resistance bridge calibrator is time-consuming for its manual operation and complex calibration process. With the intent to increase calibration efficiency, an automatic channel switch device was developed, and the resistance bridge calibrator was automated. The designed calibration device is completely computer controlled enabling a sequence of unmanned measurements. The calibration device was verified at laboratory that the maximum of error is 0.072%. It was applied to calibrate a 60-channel resistance strain gage indicator to approve its practical applicability. The result shows that the designed calibration device can realize automatic calibration and the efficiency is increased by 40%.
Rotating equipment fault noise location based on adaptive beamforming algorithm
Authors: Xu Yongshao , Liu Bingzheng , Shang Haotian , Wang Mingduo 
Published: December 2021

Abstract
Rotating machinery often produces continuous impact during operation due to the change of load and speed, which shows the characteristics of unsteady state and time-varying. Its working state can not be comprehensively judged by a single vibration state parameter. Therefore, this paper proposes to use acoustic sensors to collect the fault noise signal of rotating machinery, and use the whole column of sensors to detect the fault noise signal. Based on the microphone array, this paper studies the adaptive beamforming algorithm (MVDR) to locate the fault source of rotating machinery in space. The effect of fault source location is verified by simulation and equipment measurement experiments. The acoustic sensor does not in contact with the equipment, which will not damage the generator set, but also provide more effective information for fault source location and fault diagnosis and analysis.
Research on latent defect detection technology of high voltage cable
Authors: Liu Sanwei , Qiu Chao , Xie Yi , Duan Jianjia , Huang Fuyong , Duan Xiaoli , Zeng Zeyu 
Published: December 2021

Abstract
As a component of the Internet of things, high-voltage cables are the power supply infrastructure for the modern development of cities. The operation experience shows that the high-voltage cable has been broken down many times, due to the defective operation. At present, due to the limitation of detection technology, the research on detection and identification of defects in high-voltage cables is progressing slowly. Therefore, a new DR technology based on X-ray digital imaging is proposed in this paper to realize real-time detection of defects in the semi-conductive buffer layer of high-voltage cables, and intelligent detection of DR images of high-voltage cables by using image depth processing technology to realize intelligent identification of defects in the buffer layer of power cables. The results show that using the new DR technique proposed in this paper, the accurate and intuitive DR image of high-voltage cable can be obtained quickly, and the intelligent identification of defects can be realized.
Research progress of fault detection equipment and methods for track train’s shape part
Authors: Hao Yingqi , Xie Kun , Xu Zhepu 
Published: December 2021

Abstract
Rail transit has many advantages such as large capacity, fast speed, energy saving and environmental protection, and has gradually become an indispensable means of transportation in people’s lives. At the same time, the safety and reliability of rail transit is also facing severe challenges. The running part plays the role of load bearing, running and traction guidance, etc. It is one of the most important systems of the train, and it is also the accident-prone part. Aiming at the failures of rail vehicle wheelsets, bearings, overall frame and suspension parts, this article uses CNKI, Wanfang Data Knowledge Service Platform, IEEEXplore and ScienceDirect as the search database to investigate and analyze the research results published at home and abroad in recent years. The fault diagnosis technology of the traveling department summarizes the sensor types, installation positions and usage methods used in various diagnosis technologies, and finally puts forward the prospect of the follow-up research. The work of this paper will help researchers to systematically grasp the relevant research trends of the fault detection of the walking part, and then make clearer and deeper thinking.
Intelligent support and command system based on WAPI terminal equipment
Authors: Wang Yu , Wei Zongchun , Bao Haibo , Deng Gaofeng , Li Jiangwei , Li Pei , Nie Leigang , Fu Hua 
Published: December 2021

Abstract
In order to solve the problem that the process of WAPI terminal connection is troublesome, this paper proposes an intelligent support and command system of WAPI terminal equipment based on centralized control AC + AP architecture. The system stores WAPI certificate on AC (centralized controller), WAPI terminal equipment is associated with AP (wireless access point), and AP equipment notifies AC of the associated events of the terminal, AC equipment and terminal equipment enter authentication and complete certificate authentication. Complete access authentication through AC and terminal equipment, and store the unicast and multicast keys generated by authentication negotiation on AC. This method is more convenient to maintain the certificate. At the same time, on the premise of ensuring the security of the certificate, it also improves the encryption and decryption efficiency and improves the user’s business experience.
Active and reactive power coordinated optimal dispatch in active distribution network based on model predictive control
Authors: Qu Hanbing , Xu Zheng , Wang Bo , Zhao Pu 
Published: December 2021

Abstract
With the proliferation of the distributed energy resources (DERs), the scheduling and control of the distribution network have become more complicated. To cope with the uncertainty nature of distributed generation, a multi-timescale optimal dispatch method in active distribution network (ADN) based on the model predictive control (MPC) is proposed in this paper. First, based on MPC, a hierarchical scheduling framework for ADN is established, including long-timescale stage, and short-timescale stage. Then, via coordinated control of various resources in the ADN, i.e., distributed generators, energy storage, capacitor banks and OLTC transformer, the impact of intermittent renewable energy and load forecast errors can be reduced. Finally, considering the coupling characteristics of active and reactive power in the ADN, a joint active and reactive power optimization model is proposed to further reduce the network loss. Numerical simulation on a modified IEEE-33 distribution network system verifies the correctness and superiority of the proposed scheduling approach.
The High-Speed Low-Power Dynamic Comparator
Authors: Cao Menghua , Tang Weixun 
Published: December 2021

Abstract
This paper comments on four works for the optimization of comparator design. Today, with the development of integrated circuits, the requirements for comparators about low power, low delay, few offset voltage, and low noise are highly desirable. Specifically, these works made progress in the conventional comparator, which comprises a preamplifier and a latch. They also solved some problems, such as decreasing power and delay. Some works employ a positive feedback cross-coupled pares to provide a larger gain in the preamplifier, use PMOS switch transistors to accelerate the definition phase, or a double-tail architecture to increase the latch regeneration speed. Other work designs a charge pump to improve speed.
Research on Accurate Location Algorithm of Optimized Multi-source Data Fusion Based on Improved GRU Network
Authors: Li Zhongzhi , Li Xiaoxue , Huang Yufeng 
Published: December 2021

Abstract
The uncertainty of positioning trajectory and the existence of abnormal trajectory points are major challenges in the field of navigation and positioning. The method that only relies on global positioning system (GPS) has a large error, and the traditional location algorithms still have shortcomings in location efficiency and accuracy. Due to the successful exploration of deep learning in the field of navigation and positioning, an accurate positioning algorithm based on improved gated recurrent unit (GRU) and multi-source data fusion was proposed in this paper. Firstly, interpolation was used to fuse GPS data and inertial measurement unit (IMU) data to overcome the defect of single data. Then, an improved gated recurrent unit was introduced to process the data fusion. On this basis, the attention mechanism (AM) was added to reduce the loss of historical information and strengthen the influence of important information, so as to achieve accurate positioning. Compared with other advanced algorithms with regard to L2 norm and time of training iteration, the training time of this algorithm is reduced by more than 27%, and the highest optimization rate is 12.08%. Therefore, this algorithm can obtain higher positioning accuracy in a shorter time.
Robot physical modeling based on matlab/simulink
Authors: Wu Zhiyong , Wang Hongping , Zhang Yiwen , Ai Minglu 
Published: December 2021

Abstract
Robots play an irreplaceable role in the manufacturing industry. The use of machines instead of humans‘activing. It is a long-term development trend, but it is difficult to realize the research of real robots, and the data that the robot can collect is less. In response to the above problems, this article mainly proposes a method of physical modeling using matlab/simulink. This method can realize research without robots, and can obtain more robot-related data. This method includes robot physical modeling, importing into simulink and packaging in simulink. This article is mainly aimed at IRB6700 robot to complete the simulation platform construction.
ABB robot data collection based on dynamic link library
Authors: Wu Zhiyong , Wang Hongping , Zhang Yiwen , Ai Minglu 
Published: December 2021

Abstract
At present, with the development of the times and technology, in order to meet the needs of industrial production, robots have begun to be widely used in factories. Although the production efficiency of the robot is very high and relatively cheap compared to the labor cost, when an industrial robot fails, it will have a serious impact on the production capacity of the entire production line. Therefore, it is necessary to monitor various data of the robot. If some abnormal data can be found, it can perform effective predictive maintenance on the robot. This article mainly proposes a method for various data acquisition of ABB robots. The data acquisition interface is developed using C# and the dynamic link library is called. The data of ABB robots can be read in real time. It can realize real-time monitoring of each data of the robot.