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Synthetical Evaluation of Performance of Open-ended Stock Funds in China
Jiandong He 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.5
In this paper, eleven indexes affecting performance of open-ended stock funds are chosen. Then an improved information entropy model with genetic algorithm in which subjective and objective analysis are combined is proposed for synthetically evaluating of performance of funds in China. After that, we calculate the score of 35 funds and their ranking, which reveals that the model is practical.
The Use of GA and PSO in Evaluating the Shear Strength of Steel Fiber Reinforced Concrete Beams
Jiandong Huang,Mengmeng Zhou,Jia Zhang,Jiaolong Ren,Nikolai Ivanovich Vatin,Mohanad Muayad Sabri Sabri 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.9
Shear failure in concrete specimens and beams is one of the most sensitive cases in construction projects. Since the shear strength of specimens is affected by various parameters, it is important to study them to arrive at a predictive relationship or model. This research has used the computational methods of machine learning to achieve a new evaluation of the shear strength of reinforced concrete (RC) beams. In the first step, 85 laboratory samples were examined. These samples had different geometric and non-geometric properties. The effect of each parameter was examined for smart models, then the optimal state of the parameters was determined. By optimizing the number of parameters, basic models were developed. The different structures of these models were investigated for the accurate evaluation of the shear strength of the samples. Finally, in the second step, the particle swarm optimization (PSO) and genetic algorithm (GA) were used to perpetuate and optimize the weights of the base models. The hybrid models were developed and applied with different structures for evaluation of shear strength and the best models were selected from them. The results showed that both models offer better performance than the base model. However, the GA-based model achieved higher accuracy and less error than the PSO-based model. Finally, the performance of these models was used for new data to evaluate their performance. As the main achievement of this research, these methods can be recommended and implemented for other conditions as well.
Jiandong Sun,HyungGi Kim 중앙대학교 영상콘텐츠융합연구소 2022 TechArt :Journal of Arts and Imaging Science Vol.9 No.1
Many non-renewable historical relics have been created in the course of history. Usually, these historical relics represent the profound cultural deposit of a nation or a country and are directly related to the heritage and development of historical cultures. As time passes, these historical relics have been damaged to different extents. In the new media era, traditional communication concepts may have gradually become an impediment to the exhibition and protection of historical relics. Along with the advances in science and technology and the development of information technology, replacing the exhibition of traditional relics with digital exhibition has become an important means of protecting historical relics and delivering information to the public. Currently, digital media exhibition technology has been widely used. The application of digital media exhibition technology in exhibition and protection of historical relics are an important breakthrough that can greatly improve their protection. Digital media art has made traditional static exhibition and unitary information transfer a dynamic exhibition and interactive experience, which makes the content and effect of exhibition design richer. This is conducive to the repair and restoration of relics for which technological support is provided. This paper focuses on the virtual storage of historical relics and the exhibition and communication of cultures based on digital media art creation and through digital means. In terms of the content, the paper mainly examines the projection mode of historical relics, analyzed visual communication characteristics based on digital media art creation, and explored the cross-media integration design mode. The advantages of the art project exhibition of historical relics in the protection of relics are summarized by analyzing the most classical application cases. These advantages can provide a solid theoretical basis for the digital exhibition, communication, and protection of historical relics.
Influence of porosity and cement grade on concrete mechanical properties
Huang, Jiandong,Alyousef, Rayed,Suhatril, Meldi,Baharom, Shahrizan,Alabduljabbar, Hisham,Alaskar, Abdulaziz,Assilzadeh, Hamid Techno-Press 2020 Advances in concrete construction Vol.10 No.5
The given research focuses on examining the effect of relatively humidity (RH) and curing temperature on the hydrates as well as the porosity of calcium sulfoaluminate (CSA) cement pastes. Numerous tests, which consist of mercury intrusion porosimetry (MIP), thermosgravi metric (TG) and X-ray diffraction (XRD) were conducted. Various characterization techniques which include, scanning electron microscopy, Fourier transform microscopy along with X-ray diffraction evaluations were conducted on the samples to examine phase formation and crystallinity, morphology and microstructure along with bond formations and functional groups, respectively. During long-term study, the performance of concrete which consisted of limestone and flash-calcined was close to those from standard Portland cement concrete. Traditional classifications and methods of corrosion were widely used for the assessment of steel in concrete which may get employed to concrete which contains LC3 to recalibrate the range of polarization resistance for passitivity condition. For example, there is up to 79.5% and 146% respective flexural and compressive strengths. Moreover, they developed more advance electrical and thermo-mechanical performance with a substantial reduction in absorption of water of close to 400%. These advantages allow this research crucial to evaluate how these methods can be applied. Additionally, the research evaluates developed and more advanced cement preservation and repair techniques. The conclusion suggests concerted efforts by various stakeholders such as policy makers to enable low-carbon rates.
Zhao Jiandong,Han Mingmin,Xin Xin,Li Changcheng 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.1
The traditional dual differential luminance algorithm was influenced by the surrounding environment, and was not applicable to accurate detection at night. In view of the interference factors of reality, this paper improved the dual differential luminance algorithm by using the method of amending coefficient. Meanwhile, combined with the traffic emergency control measures under different visibility, ten detection modes were subdivided. The next, an experimental system was built in the Meteorological Observatory of Beijing, and the detection software was developed. At last, the experimental data was compared with the correlation values of scatterometer. The results show that the detection accuracies are raised, and the optimized algorithm and system can be used for highway network visibility detection.
Dynamic Visual Performance of LED with Different Color Temperature
Zhao Jiandong,Ma Shuo 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.6
In order to research the dynamic visual performance of LED in mesopic vision conditions, based on the visual performance method, the software systems were developed to set different test parameters. And the hardware systems were used to collect the reaction time of testers. Color temperature of LED, ambient luminance, luminance contrast and target speed were selected as the experimental variables, and each variable had three variances. 60 sets of experiments were carried out by 20 testers. The experiment results show that reaction time of high color temperature LED is shorter than the other two. And reaction time decreases with the increasing of the ambient luminance and luminance contrast. And target speed has significant influence on visual performance in the speed range of 60km/h to 80km/h.
Huang Jiandong,Li Hongmei,Yang Liguo,Zhao Haonan,Zhang Peng 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.4
In this paper, a novel discrete terminal integral sliding-mode backstepping control (DTISM-BSC) is proposed for the surface-mounted permanent magnet synchronous motor (SMPMSM) drive system, which improves the speed tracking performance and robustness of the system. In this control scheme, the discrete ultra-local model (ULM) of the SMPMSM drives, which employs the algebraic parameter identification technology to handle the unknown disturbance and parametric uncertainties, is first set up. Then, the terminal integral sliding-mode surface is proposed for its advantages of finite-time convergence to achieve speed rapid tracking, in which the control performance of backstepping control is improved. Thirdly, the equivalent control law is combined with the designed switching law to construct the speed controller based on the ULM. In this case, the bounded function is adopted to improve chattering problem. Meanwhile, the asymptotic stability and rapid convergence is verified. Finally, the experimental comparisons between the proposed method and the non-singular terminal sliding mode backstepping control (NTSM-BSC) are developed to validate the effectiveness of the proposed DTISM-BSC.