关键词：
cloud platform;Wireless Sensor Network;Field environment;Precision control
摘要：
The accurate environment regulation in time is an important guarantee for crop growth and its requirement is also improved with the development of modern agriculture. To solve the problems of field information's low-sharing and poor service ability, this paper develope a field environment monitoring system based on cloud platform and mobile APP. It set up a wireless sensor network in fields to collect environment parameters timely by nRF24L01 and esp8266, process & store information and make intelligent decisions on the platform OneNet, visualize data on mobile APP. The test show that the system is simple in operation, accurate in early warning, high reliability in remote control; the transmission accuracy rate of the field data is 100%. It realizes real time monitoring, remote control and early warning function of the farmland environment .
会议论文集名称：
International Conference on Systems and Informatics
关键词：
Feature point detection;Compressed sensing theory;Target tracking;PID control;Quadcopter
摘要：
Aiming at the problems of poor tracking accuracy, inadequate anti-jamming ability and unavoidable monitoring unreachable angle in the traditional tracking method of four-rotor unmanned aerial vehicle (UAV), based on compressed sensing theory and combined with FAST (Features From Accelerated Segment Test) and SURF (Speeded Up Robust Features) algorithm, this paper proposes a fast matching algorithm for multi-target detection and single-target tracking of UAV. We built a matching onboard hardware system, collected data through the camera, and then used feature point detection and matching algorithms to detect multiple moving objects. Finally, we used compressed sensing theory to quickly locate the tracked objects. Compared with the traditional algorithm, this algorithm needs much less time to achieve tracking in the same scene than the general tracking algorithm, reaching the millisecond level, and the tracking loss rate is only 5% for the object whose area is less than 250*256 pixels in the image, which greatly improves the tracking accuracy and anti-jamming performance.
会议论文集名称：
International Conference on Systems and Informatics
关键词：
information islands;data structure;Python;information resources in-depth processing;visualization
摘要：
The problem of "information islands" has become a bottleneck that restricts information construction and resource sharing in universities. Information islands cause waste of information resources. The data that has been used is only used in digital displays and cannot be used for management and decision-making. Students cannot absorb in-depth and the information obtained is not comprehensive. As a result, the information can only be used within the school. It can neither share with others nor use the resources of others to update and add to their information. A large number of established education networks are unable to function. Even the more networks are built, the greater waste are existed. Through the visualization of the data network under the campus environment, the free flow of data and information is an important way to solve information islands. This paper proposes an algorithmic theory of data structure visualization and provides an information flow project under the Python scene. It attempts to solve the problems of information islands in the campus environment and helps students to better obtain information and digest information.
会议论文集名称：
International Conference on Systems and Informatics
关键词：
virtualized desktop;virtualization technology;art and design;flexPod architecture;vGPU technology
摘要：
Desktop flexibility and security is an important requirement for the operation, management and maintenance of desktop technology in Colleges and universities, which directly reflects the quality and level of information construction in Colleges and universities. By analyzing the effectiveness of traditional desktop technology, this paper clarifies the special performance requirements of desktop technology in art and design colleges and universities, designs a desktop component centralized management mode based on virtualization technology, and constructs a virtual desktop based on FlexPod architecture using vGPU technology. Application platform. The application of this platform greatly reduces the complexity of IT management on the basis of improving desktop performance, and provides a reference model for the application of virtualized desktop technology in national art and design colleges.
摘要：
Scientific classification of land production functions can promote the efficient use of land. In this paper, 16 land production functions were collected, and 10 characteristic features of land production function were put forward according to the different attributes of each function. The characteristics of the land production functions are assigned to obtain the land production function score table, Then use the hierarchical clustering and K-means clustering analysis those data, and the results of three kinds of hierarchical clustering and one K-means clustering were obtained. By comparing with the results of sequence classification, 16 land production functions are classified into three categories.
摘要：
The meteorological factors play an important role in rice yield. In this paper, according to the current agricultural meteorological factors on the impact of agricultural production, an the rice yield prediction model was established by using multiple stepwise regression analysis. The experimental results show that the average forecast accuracy is more than 98%, and the prediction result is consistent with the trend of the measured results, and the prediction results are credible.
摘要：
Accurate and real-time water quality assessment is an important way to ensure healthy aquaculture and protect the water environment. Due to the diversity, nonlinear and uneven distribution of aquaculture water quality parameters, it's very difficulty to assess the water quality. In this paper, the accurate water quality parameters are obtained by an adaptive weighted fusion method, then the water quality is assessment by the BP neural network, thus the software of the monitoring and evaluation system for ecological water quality is developed. The test results show that the accuracy of the water quality assessment system is 93.3%, which has good practicability.
关键词：
Cache;Multi-core;task scheduling;schedule length;average response time
摘要：
In the past few years, multi-core processors incorporating four, six, eight, or more cores on a single die have become ubiquitous. Those cores, having their own private caches, often share a higher level cache memory, which leads to compete among different tasks. This can seriously affect the average performance of multi-core systems as the probability of cache hit could be lowered. In realizing this, we study the problem of scheduling bag-of-tasks (BoT) applications with shared cache constraint on multi-core systems. We first use cache space isolation techniques to divide shared caches into partitions. Then, we give a motivational example and outline the shared cache aware scheduling problem of multi-core systems. Finally, to provide an optimum solution for this problem, we propose a heuristic shared cache contention aware scheduling (SCAS) algorithm on multi-core systems. Our extensive simulation performance evaluation study clearly demonstrate that our proposed SCAS algorithm outperforms the existing traditional scheduling algorithm Min-min and the modified algorithm MSCAS in terms of schedule length and average response time.
关键词：
Three rural loans;Support vector machine;Classification prediction
摘要：
Based on the data mining method, Support Vector Machine technology, Correlated Analytical Variable Selection method and Principal Component Analytical Variable Dimension Reduction method, setting five-category classification and prediction model for “Three rural” loan risk of commercial bank, then make classification prediction for an Agricultural Bank of China in Changsha and verify the outcome through this prediction model, and make comparative analysis with the classification prediction accuracy of neural network and the time consumed for processing, the advantage of this method is obvious. This five-category classification and prediction model for loan risk have great meanings for bank to establish more robust customer relationship management system and attract more high-quality customer resources.
会议名称：
International Conference on Software Engineering and Information Technology (SEIT)
会议时间：
JUN 26-28, 2015
会议地点：
Guilin, PEOPLES R CHINA
会议主办单位：
[Nie, X. Y.;Fang, K.;Rao, D. P.] Hunan Agr Univ, Coll Informat Sci & Technol, Changsha, Hunan, Peoples R China.
关键词：
Plant crown;Trigeminal tree structure;Box counting dimension
摘要：
The plant crown can be considered as fractal, how to describe the dense degree of plant crown by fractional dimension, there is a little research. In this paper, the Crown dimension of plant with trigeminal tree structure is calculated by box dimension method, the box dimension is (lg3/lg) (1/m(2/root 3sin alpha)).
摘要：
This paper combined with the application of WCDMA network, embedded technology and radio terminal development technology, designed and developed the rural broadcasting system based on 3G Network. This system is easy to operate, the server using the network idle time intensive program to push program can effectively avoid the network storm. Meanwhile the terminal support live configuration for convenience of the users. This system combines Mobile communication network with Broadcast network under the big trend of network convergence, which plays an important role in the development of rural broadcasting.
作者机构：
[Zhou, Jin; Xiong, Jianwu] HuNan Ind Polytech, Wuhan, Peoples R China.;[Dai, Xiaopeng] Hunan Agr Univ, Sch Informat Sci & Technol, Changsha, Hunan, Peoples R China.
会议名称：
International Conference on Information Technology and Industrial Automation (ICITIA)
会议时间：
JUL 04-05, 2015
会议地点：
Guangzhou, PEOPLES R CHINA
会议主办单位：
[Zhou, Jin;Xiong, Jianwu] HuNan Ind Polytech, Wuhan, Peoples R China.^[Dai, Xiaopeng] Hunan Agr Univ, Sch Informat Sci & Technol, Changsha, Hunan, Peoples R China.
摘要：
In this paper, in view of the features such as heterogeneity, uncertainty and the diversified representative forms of AIOT information, based on the analysis of the traditional methods of information fusion, an AIOT information fusion method based on the hybrid algorithm of ontology and neural networks and architecture is proposed in order to raise the level of information accurate management.(1)
作者机构：
[Fang, Kui; Zhang, Xiao-ling] Hunan Agr Univ, Coll Informat Sci & Technol, Changsha, Hunan, Peoples R China.;[Ma, Xian-jue] Changsha Sixin Network Technol Co Ltd, Changsha, Hunan, Peoples R China.
会议名称：
International Conference on Electrical and Electronics - Techniques and Applications (EETA)
会议时间：
AUG 23-24, 2015
会议地点：
Phuket, THAILAND
会议主办单位：
[Zhang, Xiao-ling;Fang, Kui] Hunan Agr Univ, Coll Informat Sci & Technol, Changsha, Hunan, Peoples R China.^[Ma, Xian-jue] Changsha Sixin Network Technol Co Ltd, Changsha, Hunan, Peoples R China.
关键词：
3G;STM32F103;3G Rural broadcasting terminal;Rural radio
摘要：
Base on the 3G wireless network technology, the mobile communication network can be used as the transmission channel of the rural broadcast programIn this paper, the terminal of rural broadcasting sys
会议名称：
Joint 14th IEEE Int Conf on Trust, Secur and Privacy in Comp and Commun / 13th IEEE Int Symposium on Parallel and Distributed Proc with Applications / 9th IEEE Int Conf on Big Data Science and Engineering (IEEE TrustCom-ISPA-BigDataSE)
会议时间：
AUG 20-22, 2015
会议地点：
Aalto Univ, Helsinki, FINLAND
会议主办单位：
Aalto Univ
关键词：
key management;rekeying;mult-privileged group communications;security
摘要：
In some group-oriented applications, users can access several data resources according to their respective willingness. So, how to effectively access the data resources is a challenge in multi-privileged group communications. Some key management schemes for hierarchical access control are proposed. In this paper, we discuss the challenges of key management. Then, we present a list of evaluation criteria for secure key management for multi-privileged group communications, and investigate the features of some typical schemes. The schemes can be divided into several classes according to some separate dimensions, such as the topology of key model, the rekeying method, the rekeying policy and the encryption method of data resources. We analyze them comparatively regarding to the secure distribution and renewal of key materials.
摘要：
To reduce the error and faster classification by mechanizing in classifying the potato shape and size through machine vision using the extraction of characters procedure to identify the size, and using the shape detection procedure to identify the shape. Test results in potato size detection revealed 40/191 = 0.210mm/pixel as length scale or calibration factor (40/M) where 40 is the table tennis ball size (40mm) and 191 as image pixels table tennis (M); measurement results revealed that between the algorithm results and the manual measurements, the absolute error was <3mm, while the relative error rate was <4%; and the measurement results based on the ellipse axis length can accurately calculate the actual long axis and short axis of potato. Potato shape detection revealed the analysis of 228 images composed of 114 positive and 114 negatives side, only 2 have been incorrectly classified, mainly because the Extracted ratio (R) of the potato image of those two positive and negative images are near 0.67, respectively 0.671887, 0.661063, 0.667604, and 0.67193. The comparison to establish a calibration system method using both basic rectangle and ellipse R ratio methods to detect the potato size and shape, revealed that the basic rectangle method has better effect in the case of fixed place. Moreover, the ellipse axis method was observed to be more stable with an error rate of 7%. Therefore it is recommended that the ellipse axis method should be used to detect the shape of potato for differentiation into round, long cylindrical, and oval shapes, with the accuracy level of 98.8%.
摘要：
Agricultural expert experience highlights its advantages in the agricultural biological disaster forecast evaluation. Aiming at solving the expert experience fusion, this paper converted expert information into reliability probability density distribution, determined the evidence theory knowledge framework and basic probability distribution function based on the consistency definition and at the same time, the weight of each distribution is confirmed by using D-S synthesis rules. This paper ultimately obtained after-experience reliability level of fusion expert experiences in the agricultural production.
摘要：
Multi-core systems, having their own private caches, often share a higher level cache memory, which leads to compete among different tasks. This can seriously affect the average performance of multi-core systems as the probability of cache hit could be lowered. In realizing this, we first use cache space isolation techniques to divide shared caches into partitions. To provide an optimum solution for this problem, we propose a heuristic shared cache contention aware scheduling (SCAS) algorithm on multi-core systems. Our extensive simulation performance evaluation study clearly demonstrate that our proposed SCAS algorithm outperforms the existing traditional scheduling algorithm Min-min and the modified algorithm MSCAS in terms of schedule length and average response time.
摘要：
In this paper, according to the principle of Hough transform, using the multi - directional image information of an object to calculate the pixel points of the object in the space, and get the real three-dimensional image from the object surface texture mapping which is composed of pixel points. This method is good for the reconstruction of plant root, branches and flowers. There's a certain novelty value in this approach, such as the simple algorithm, simple operation, good robustness, and can be implemented on the PC to achieve the level of full automation and real-time processing, so it has important application prospect.
