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Search Results: 1 - 10 of 11861 matches for " Zhengyang Xie "
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Data Analysis Instance for NBA Star Shooting  [PDF]
Zhengyang Xie, Junhui Gao
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.49001
In this paper, we analyze the field data of NBA star players. We choose 25 of them and download the data from the NBA official website. The data is statistically analyzed from all aspects: the position of the player, the location on the court, the time order of two points and three points and the combination of these elements. We get some results according to the analysis. For example, players of all five positions prefer to make shots right ahead the basketry; attempts of three points reach the climax during the third quarter; over the last five minutes of the game, the rate of the number of two-point attempts is the lowest and that of three-point attempts is the highest at the 46th minute.
Design of a Control Device for Synthetic Making Test Based on Pre-Arcing Current Detection and Phase Control  [PDF]
Zhengyang ZHOU, Minfu LIAO, Xingming FAN
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2009, DOI: 10.4236/jemaa.2009.14043
Abstract: The synthetic making test has been widely used in evaluating the break ability of high-voltage circuit breaker. However, the test research and application are still inadequate, especially in the condition of rated voltage. According to the realistic conditions of test stations in China, a control device based on pre-arcing current detection and phase control is proposed in this paper. A sample of the control device made up of DSP TMS320LF2407A is fabricated, in which the CPLD MAX7064 is used to transmit signals for EMC design. It can be applied in full voltage synthetic making test at a level of 126kV/63kA. The test results show that, it is accurate to control the making phase of the applied voltage, whether the closing is demanded at voltage peak or zero.
Alternative remote sensing materials and inventory strategies in tropical forest inventory - Case Lao PDR / Materiais alternativos de sensoriamento remoto e estratégias de inventário no inventário de florestas tropicais – Caso Lao PDR
Timo Tokola,Zhengyang Hou
Ambiência , 2012,
Abstract: In this study, the potential of remote sensing in tropical forests is examined in relation to the diversification of sensors. We report here on the comparison of alternative methods that use multisource data from Airborne Laser Scanning (ALS), Airborne Color Infrared Photograph (CIR), Quickbird and ALOS AVNIR-2 to estimate stem volume and basal area, in Laos. The predictors of ALS metrics were calculated by means of the canopy height distribution approach, while predictors from both spectral and textual features. The correlation of remote sensing materials and field data were used to demonstrate needs for field inventory in different forest landscapes and varying tropical forest conditions. Variogram based analysis was used to derive optimal forest inventory procedure for different parts of case country.ResumoNeste estudo, o potencial do sensoriamento remoto em florestas tropicais é examinado em rela o a diversidade de sensores. Registramos aqui a compara o de métodos alternativos que utilizam dados de fontes múltiplas do Airborne Laser Scanning (ALS), Airborne CIR, Quickbird e ALOS AVNIR-2 para estimar o volume do caule e a área basal em Laos. Os preditores dos dados ALS foram calculados pelo método da distribui o de altura do dossel enquanto preditores para características espectrais e textuais foram geradas, respectivamente, para os dados Airbone CIR e ALOS AVNIR-2. A correla o dos materiais de sensoriamento remoto e dados de campo foram usados para demonstrar a necessidade do inventário de campo em diferentes paisagens florestais e condi es variáveis em floresta tropical. A análise baseada no variograma foi utilizada para gerar um procedimento otimizado para o inventário florestal de diferentes partes do país em estudo.
A Multi-Agent Particle Swarm Optimization for Power System Economic Load Dispatch  [PDF]
Chenbin Wu, Haiming Li, Lei Wu, Zhengyang Wu
Journal of Computer and Communications (JCC) , 2015, DOI: 10.4236/jcc.2015.39009
Abstract: A new versatile optimization, the particle swarm optimization based on multi-agent system (MAPSO) is presented. The economic load dispatch (ELD) problem of power system can be solved by the algorithm. By competing and cooperating with the randomly selected neighbors, and adjusting its global searching ability and local exploring ability, this algorithm achieves the goal of high convergence precision and speed. To verify the effectiveness of the proposed algorithm, this algorithm is tested by three different ELD cases, including 3, 13 and 40 units IEEE cases, and the experiment results are compared with those tested by other intelligent algorithms in the same cases. The compared results show that feasible solutions can be reached effectively, local optima can be avoided and faster solution can be applied with the proposed algorithm, the algorithm for ELD problem is versatile and efficient.
Economic Load Dispatch Based on Efficient Population Utilization Strategy for Particle Swarm Optimization  [PDF]
Lei Wu, Haiming Li, Zhengyang Wu, Chenbin Wu
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2015, DOI: 10.4236/ijcns.2015.89035
Abstract: In this paper, the efficient population utilization strategy for particle swarm optimization (EPUSPSO) is proposed to solve the economic load dispatch (ELD) problem of power system. This algorithm improves the accuracy and the speed of its convergence by changing the number of particles effectively, and improving the velocity equation and position equation. In order to verify the effectiveness of the algorithm, this algorithm is tested in three different ELD cases of power system include IEEE 3-unit case, 13-unit case, and 40-unit case, and the obtained results are compared with those obtained from other algorithms using the same system parameters. The compared results show that the algorithm can find the optimal solution effectively and accurately, and avoid falling into the local optimal problem; meanwhile, faster speed can be ensured in the case.
Ultraslow Optical Solitons and Their Storage and Retrieval in an Ultracold Ladder-Type Atomic System
Yang Chen,Zhengyang Bai,Guoxiang Huang
Physics , 2014, DOI: 10.1103/PhysRevA.89.023835
Abstract: We propose a scheme to obtain stable nonlinear optical pulses and realize their storage and retrieval in an ultracold ladder-type three-level atomic gas via electromagnetically induced transparency. Based on Maxwell-Bloch equations we derive a nonlinear equation governing the evolution of probe field envelope, and show that optical solitons with ultraslow propagating velocity and extremely low generation power can be created in the system. Furthermore, we demonstrate that such ultraslow optical solitons can be stored and retrieved by switching off and on a control field. Due to the balance between dispersion and nonlinearity, the ultraslow optical solitons are robust during propagation, and hence their storage and retrieval are more desirable than that of linear optical pulses. This raises the possibility of realizing the storage and retrieval of light and quantum information by using solitonic pulses.
Articulated Motion Learning via Visual and Lingual Signals
Zhengyang Wu,Mohit Bansal,Matthew R. Walter
Computer Science , 2015,
Abstract: In order for robots to operate effectively in homes and workplaces, they must be able to manipulate the articulated objects common to environments built for and by humans. Previous work learns kinematic models that prescribe this manipulation from visual demonstrations. Lingual signals, such as natural language descriptions and instructions, offer a complementary means of conveying knowledge of such manipulation models and are suitable to a wide range of interactions (e.g., remote manipulation). In this paper, we present a multimodal learning framework that incorporates both visual and lingual information to estimate the structure and parameters that define kinematic models of articulated objects. The visual signal takes the form of an RGB-D image stream that opportunistically captures object motion in an unprepared scene. Accompanying natural language descriptions of the motion constitute the lingual signal. We present a probabilistic language model that uses word embeddings to associate lingual verbs with their corresponding kinematic structures. By exploiting the complementary nature of the visual and lingual input, our method infers correct kinematic structures for various multiple-part objects on which the previous state-of-the-art, visual-only system fails. We evaluate our multimodal learning framework on a dataset comprised of a variety of household objects, and demonstrate a 36% improvement in model accuracy over the vision-only baseline.
Concept and Application of Ecological Industry Chain System

Yin Qi,Xiao Zhengyang,

环境科学 , 2002,
Abstract: This paper is the first to present the concept of the ecological industry chain system and universality method. By this concept the developing and implementing of the ecological industry chain system of hemp products in Chaoyang, Taian and other areas of China's northern region and testify its effectiveness were analyzed.
Interstitial magnetic resonance lymphography is an effective diagnostic tool for the detection of lymph node metastases in patients with cervical cancer
Hong Ying,Xiang Luojun,Hu Yali,Zhou Zhengyang
BMC Cancer , 2012, DOI: 10.1186/1471-2407-12-360
Abstract: Background The aim of the present study was to determine the feasibility of detecting sentinel lymph node (SLN) metastases using interstitial magnetic resonance (MR) lymphography in patients with cervical cancer. MR data were compared to pathological results from the lymph nodes excised during surgery. Methods Twenty-eight patients with cervical cancer were enrolled and studied from January 2006 to December 2010. All patients underwent interstitial MR lymphography to determine the presence of sentinel lymph nodes and visualize lymphatic vessel drainage in the pelvis. Radical hysterectomy and excision of pelvic lymph nodes was performed according to their lesion grade. Gadodiamide was injected either intradermally into the bipedal toe web, into the labia majora or into the cervical tissue. MR results were compared with pathological reports. Results In 28 patients, lymphatic vessel drainage and lymph node groups were clearly visualized. Of these, 5 were MR lymphography positive and 23 were MR lymphography negative. Six had pathologically proven metastasis, five had true positives and 1 had a false negative in the obturator lymph node. Conclusions Interstitial MR lymphography can be used to determine the extent and shape of pelvic lymphatic vessel drainage and lymph node metastases in patients with cervical cancer.
Experimental Study on Series Operation of Sliding Vane Pump and Centrifugal Pump
Tao Li,Weiming Zhang,Ming Jiang,Zhengyang Li
International Journal of Rotating Machinery , 2013, DOI: 10.1155/2013/921283
Abstract: A platform for sliding vane pump and centrifugal pump tests is installed to study the series operation of them under different characteristics of pipeline. Firstly, the sliding vane pump and the centrifugal pump work independently, and the performance is recorded. Then, the two types of pumps are combined together, with the sliding vane pump acting as the feeding pump. Comparison is made between the performance of the independently working pump and the performance of series operation pump. Results show that the system flow rate is determined by the sliding vane pump. In order to ensure the stability of the series operation pumping system, the energy consumption required by the pipeline under the system flow should be greater than the pressure energy centrifugal pump can generate. Otherwise, the centrifugal pump can not operate stably, with reflux, swirl, gas-liquid two-phase flow in the runner and strong vibration and noise. The sliding vane pump can be in serial operation with the centrifugal pump under limited conditions. 1. Introduction In china, some oil devices are equipped with sliding vane pumps (such as the fixed refueling vehicles), and some are equipped with centrifugal pumps (such as the delivery pumps in oil pipeline). In order to complete the mission of transporting oil for emergency, there is a strong demand for combining these equipments together under current equipment system, thus leading to the series operation of the two types of pumps. However, the working principles of sliding vane pump and centrifugal pump are completely different. The former belongs to positive displacement pumps, while the latter belongs to dynamic pumps [1, 2]. The series, parallel, and series-parallel operations of centrifugal pumps are widely used [3–5]. Relatively, there are rare reports and research literatures on the series operation of sliding vane pumps and the two types of pumps. According to the working performance of sliding vane pump, Daniel and Wordley [5] put forth the concept that it is not necessary to run pumps in series because a positive displacement pump will be self-compensating for system pressure and will only move a specific number at a given rpm, besides there is no advantage to place positive displacement pumps in series when they are in close proximity to each other. Karassik and Messina [1] presented an idea on the issue of series operation of positive displacement pump and centrifugal pump that it would be most unusual to encounter a positive displacement pump feeding into the suction of a centrifugal pump because of the high pressure
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