Study Of Acquisition Streetlights Background Signal By Multi-Sensor Array

WU Yue,SHI changhong,YANG Wei 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10

The multi-sensor array, such as the sound, light, infrared, vibration etc, is used to get the street lights environmental information. Combined with a variety of clock control strategy for control lamps, it can achieve the background information of perception, detection, identification, and collect the typical characteristics of an effective signal, to rationally determine the threshold value range in the circuit design and lay a solid foundation for the realization of intelligent control of lights. The joint acquisition streetlights background signal through a variety of sensors carried out in a typical experimental design and preparation, principles, introduction, experimental methods and experimental analysis of the results, not only can test the design of control circuit, but also optimize the choice of the sensor models to provide true comparative data. In order to facilitate in a real environment to detect and further identify goals, to achieve the typical information data fusion of specific objectives, the ultimate street intelligent control can be achieved. Experimental results show that the magnetic sensors and infrared sensors detect close proximity, so the model of sensor needs to be replaced or further improved design (such as the optimization of pre-level filtering and amplification circuit design). Acoustic sensors and vibration sensors to detect distance, can meet night lighting control at residents of the community as well as tourist attractions. But there are a lot of distances to meet the use demands of roads and high-speed traffic, the more optimal designs and experiments is need. In addition, a range problem of information synchronize data collection, background noise and a variety of information data crosstalk need to be solved in the joint acquisition experiments, which in the paper were discussed.

More precise determination of V_cb & V_ub and direct CP violation in charmless B decays

Yue-liang Wu,Yu-Feng Zhou,YWhen-Yu Wang 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.2

More precise extractions on the two important CKM matrix elements jVcbj and jVubj are presented up to 1=m2 Q corrections, based on the complete heavy-quark eective eld theory (HQEFT) of QCD. The HQEFT as a large component QCD provides us with a complete theoretical framework for correctly and systematically evaluating the subleading and higher-order contributions in 1=mQ expansion of heavy quarks. A global analysis on charmless B decays is made, based on the isospin and SU(3) avor symmetry. An isospin relation is found to be very useful for studying SU(3) symmetry-breaking eects of strong phases and exploring new types of electroweak penguin eects. The direct CP violation in charmless B decays is predicted, and its precise measurement is helpful either for testing SU(3) symmetry breaking eects of strong phases or for probing new physics beyond standard model.

An improved resonantly driven piezoelectric gas pump

Yue Wu,Yong Liu,Jian-Fang Liu,Long Wang,Xiaoyang Jiao,Zhigang Yang 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.3

Piezoelectric pumps have the potential to be used in a variety of applications, such as in air circulation and compression. However, piezoelectric membrane pumps do not have enough driving capacity, and the heat induced during the direct contact between the driving part and the gas medium cannot be dissipated smoothly. When the gas is blocked, the piezoelectric vibrator generates heat quickly, which may eventually lead to damage. Resonantly driven piezoelectric stack pumps have high performance but no price advantage. In this situation, a novel, resonantly driven piezoelectric gas pump with annular bimorph as the driver is presented. In the study, the working principle of the novel pump was analyzed, the vibration mechanics model was deter-mined, and the displacement amplified theory was studied. The outcome indicates that the displacement amplification factor is related with the original displacement provided by the piezoelectric bimorph. In addition, the displacement amplification effect is related to the stiffness of the spring lamination, adjustment spring, and piezoelectric vibrator, as well as to the systematic damping factor and the driving frequency. The experimental prototypes of the proposed pump were designed, and the displacement amplification effect and gas output performance were measured. At 70 V of sinusoidal AC driving voltage, the improved pump amplified the piezoelectric vibrator displacement by 4.2 times, the maximum gas output flow rate reached 1685 ml/min, and the temperature of the bimorph remained normal after 2000 hours of operation when the gas medium was blocked.

Altruistic or Self-interested: Modeling Chinese Aid to the Pacific Island Countries

Wu Yue 연세대학교(미래캠퍼스) 빈곤문제국제개발연구원 2021 地域發展硏究 Vol.30 No.2

China has become a major donor to the Pacific Island Countries (PICs). However, Chinese aid arouses debate over China’s deep intentions. Realists argue that Chinese aid is self-interested and aims to serve its economic and political purposes. Conversely, followers of the South–South Cooperation believe that Chinese aid is rooted in altruism. Using panel data covering 13 independent PICs from 2006 to 2019, this paper examines whether Chinese aid is self-interested or altruistic. In addition, it aims to identify the determinants of Chinese aid as well as the effect of the inauguration of President Xi and the income levels of the recipients on China’s aid allocation. The paper finds that Chinese aid to the PICs became increasingly altruistic after President Xi assumed office. The altruistic characteristic also displays continuity since the era of former President Hu. Moreover, China tends to favor lower-income island countries but has to consider its capacity. The findings suggest that altruism, which is embedded in China’s aid to the PICs, is consistent with China’s increasing willingness to assume international responsibility. Meanwhile, the limited importance of the PICs also explains the less interest-oriented consideration of China’s aid allocation

Effect of microstructures on the shrinkage of injection molding product

Yue Wu,Yao Gong,차경제,박장민 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.3

Shrinkage of injection molding product is a well-known phenomenon which is determined by many factors such as material property, processing condition, mold design, and product design. This study aims to investigate the effect of microscopic structures on the shrinkage of macroscopic product. Flat specimens with and without microstructures were injection molded and the distribution of in-plane shrinkage was measured using an optical method. In the case without microstructures, anisotropic shrinkage is observed and the shrinkage magnitude increases with the distance from the gate. By applying the microstructures, the shrinkage could be reduced significantly, and the effect is especially noticeable when lower packing pressure was applied in the injection molding process. The numerical simulation result is also presented which suggests the importance of material data and lateral motion modeling for accurate prediction of the shrinkage.

China International Development Cooperation Agency: Establishment, Improvement, and Limitations

( Wu Yue ),( Zhang Muhui ) 부경대학교 글로벌지역학연구소 2021 Journal of Global and Area Studies(JGA) Vol.5 No.1

Foreign aid is a salient component of China’s diplomacy. In recent years, China has gradually become a prolific donor and has attracted extensive international attention. In 2018, the Chinese government established the China International Development Cooperation Agency (CIDCA) as a specialized agency to manage its outgoing foreign aid, which represents China’s determination to reform its foreign aid system further. This paper analyzes the factors leading to the establishment of CIDCA and presents a comprehensive evaluation of its impacts on China’s foreign aid. It argues that CIDCA is a product of the internal and external pressures faced by the Chinese government. The agency exerts a multifaceted influence on, institutionalizes the characteristics of, and alleviates the problems existing in China’s foreign aid. However, CIDCA is not a panacea for Chinese aid because it has not completely solved existing problems. Thus, CIDCA is an initial step in the right direction. As such, its future influence and effectiveness require further observation.

A sum of an alternating series involving central binomial numbers and its three proofs

Yue-Wu Li,Feng Qi 한국수학교육학회 2022 純粹 및 應用數學 Vol.29 No.1

In the note, by virtue of Abel's theorem and Abel's limit theorem in the theory of power series, the author provides three proofs for a sum of an alternating series involving central binomial numbers.

Optimizing opportunistic preventive maintenance strategy for multi-unit system of CNC lathe

Yue Wu,Zhaojun Yang,Jili Wang,Xiaojuan Chen,Wei Hu 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.1

Due to the many components in the multi-unit system (i.e., CNC machine tools), the existing preventive maintenance (PM) strategies conducting independent PM for every component are time-consuming and waste unnecessary maintenance and downtime costs. Hence, this paper introduces the idea of opportunistic maintenance into the PM and proposes an opportunistic imperfect PM approach, which is a more realistic PM policy for a multi-unit system. In this approach, the effect of PM is assumed to be imperfect to correct the failure rate of each unit. According to the corrected failure rate function, the imperfect PM strategy of a single unit is optimized by minimizing the proposed unit maintenance cost rate under the limitation of minimum reliability. Then, these independent imperfect PM strategies for units are rescheduled by the proposed opportunistic PM strategy under the condition of judging the reliability OM threshold of units. We further optimize the opportunistic PM strategy by minimizing the total maintenance cost. Finally, the advantage of our approach is verified by the case study of 18 CNC lathes.

Stem Cell-Derived Exosomes: A New Method for Reversing Skin Aging

Wu Jinyan,Wu Sai-Nan,Zhang Li-Ping,Zhao Xiansheng,Li Yue,Yang Quyang,Yuan Ruoyue,Liu Jian-Lan,Mao Hong-Ju,Zhu Ningwen 한국조직공학과 재생의학회 2022 조직공학과 재생의학 Vol.19 No.5

Senescence is an inevitable natural life process that involves structural and functional degeneration of tissues and organs. Recently, the process of skin aging has attracted much attention. Determining a means to delay or even reverse skin aging has become a research hotspot in medical cosmetology and anti-aging. Dysfunction in the epidermis and fibroblasts and changes in the composition and content of the extracellular matrix are common pathophysiological manifestations of skin aging. Reactive oxygen species and matrix metalloproteinases play essential roles in this process. Stem cells are pluripotent cells that possess self-replication abilities and can differentiate into multiple functional cells under certain conditions. These cells also possess a strong ability to facilitate tissue repair and regeneration. Stem cell transplantation has the potential for application in anti-aging therapy. Increasing studies have demonstrated that stem cells perform functions through paracrine processes, particularly those involving exosomes. Exosomes are nano-vesicular substances secreted by stem cells that participate in cell-to-cell communication by transporting their contents into target cells. In this chapter, the biological characteristics of exosomes were reviewed, including their effects on extracellular matrix formation, epidermal cell function, fibroblast function and antioxidation. Exosomes derived from stem cells may provide a new means to reverse skin aging.

A Research on User Interest Model Using Ontology and VSM Extension

Yue-zhong Wu,Shu-hong Chen 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.7

The user interest model is the key technology for us to efficiently obtain personalized high quality resources in huge amounts of data. On the basis of traditional user interest model, combining with the concept of ontology, this paper comes up with a construction method based on ontology semantic tree and space vector method, and its eigenvalue is changing by using forgetting curve. The model describes a theme by using semantic concept tree, and it not only simply to describe the semantic relations between concepts, but also can reflect the user interest drift character. It is more accurate in characterization of user interest, and better reflects the change of user interest, and efficiently improves the quality of network document resource personalized services. Finally the experiment describes the update process of the proposed model by using an example, and illustrates that the proposed model is simple and practical.