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499 results on '"Chen, Zhi‐Xin"'

107. Pedestrian detection based on the combination of HOG and background subtraction method

Author

Zhang Liquan, Wang Bing-bing, Chen Zhi-xin, and Wang Jia

Subjects
Background subtraction, Correctness, business.industry, Feature (computer vision), Computer science, Pedestrian detection, Computer vision, Artificial intelligence, business, Object detection
Abstract

Human detection plays an important role in Intelligent Video Surveillance. Real-time and accuracy are the two important capabilities in the human detection algorithm. The pedestrian detection method based on HOG feature draws many researchers' attention for its excellent results. However, due to HOG-based detection method requires large amounts of computing, it is difficult to meet the actual demand in real-time applications. This paper proposes a pedestrian detection method that is a combination of HOG detection method and Background Subtraction detection algorithm and achieves the accuracy and real-time demand. Experimental results show correctness and effectiveness of the method proposed in this paper.

Published
2011

108. Discussion of chaos attractor simulation analysis based on periodic orbits theory

Author

Luo Kai-qing, Chen Zhi-xin, Xiao Hua, and Qiu Shui-sheng

Subjects
Nonlinear Sciences::Chaotic Dynamics, CHAOS (operating system), Control of chaos, Mathematics::Dynamical Systems, Synchronization of chaos, Attractor, Cell model, Chaotic, Structure (category theory), Periodic orbits, Statistical physics, Mathematics
Abstract

An approach to some statistical properties of chaotic attractors based on the cell model of chaotic attractor had been presented, we discusses some simulation issues about the method in the paper. It is helpful to apply the method to deeply study the structure of chaos attractors and understand the chaotic mechanism more properly.

Published
2010

109. Prognostic significance of the combination of preoperative hemoglobin, albumin, lymphocyte and platelet in patients with gastric carcinoma: a retrospective cohort study

Author

Chen, Xiao-Long, primary, Xue, Lian, additional, Wang, Wei, additional, Chen, Hai-Ning, additional, Zhang, Wei-Han, additional, Liu, Kai, additional, Chen, Xin-Zu, additional, Yang, Kun, additional, Zhang, Bo, additional, Chen, Zhi-Xin, additional, Chen, Jia-Ping, additional, Zhou, Zong-Guang, additional, and Hu, Jian-Kun, additional

Published
2015
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112. Research on the networked control system technology applied in Intelligent Building

Author

Chen Zhi-xin, Wei Dong, and Cui Qing-Quan

Subjects
Building management system, Intelligent computer network, Computer science, business.industry, Wireless network, Distributed computing, Control engineering, Networked control system, business, Scheduling (computing), Building automation, Data transmission
Abstract

Intelligent Building is a Networked Control System (NCS) actually, and NCS is the research focus and the future development trend. Therefore, it is significant to research the NCS applied in Intelligent Building. In this paper, according to Intelligent Building, the application research based on NCS technology is proposed from the system prospect. The data transmission in Intelligent Building network is analyzed through the network information scheduling, and scheduling algorithm is also adopted, which can guarantee data transmission in the subsystem of Intelligent Building, improve network utilization and keep the system operate in stable state. Finally, simulation is conducted by Truetime toolbox.

Published
2010

113. Design and implementation of a E-commerce system based on PKI

Author

Chen Zhi-xin and Zhang Lin

Subjects
business.industry, Network security, Computer science, Public key infrastructure, Cryptography, Information security, E-commerce, Computer security, computer.software_genre, Encryption, Public-key cryptography, The Internet, business, computer
Abstract

With the wide applications of Internet, it has gradually impacted and changed the life styles and business models. E-commerce is widely used in our daily life. More and more people pay attention to the security problems of E-commerce: confidentiality, integrity, availability, controllability, non-repudiation and accountability. In cryptology, those problems were solved by public key technology. Public Key Infrastructure(PKI) is the base and core of network security, it can provide good security services for the world of network, by using asymmetric encryption algorithms. This paper takes E-contract as an example and puts forward the solution of E-commerce by using technology PKI.

Published
2010

120. Performance evaluation of a network-based localized mobility management mechanism

Author

Wang Lixin, Chen Zhi-xin, Jian Yingxia, and Zheng Dawei

Subjects
Engineering, Mobility model, Handover, business.industry, Mobile IP, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Mobile computing, Wireless, business, Fault (power engineering), Mobility management, Protocol (object-oriented programming), Computer network
Abstract

In this paper, we analyze basic performance factor of PMIPv6 for mobility management such as handoff latency is not different from that of Mobile IPv6. Thus the fault of large handoff latency will still influence the latency-sensitive service. Meanwhile PMIPv6 might lead to increase location update signaling cost while mobile nodes handoff frequently for it is based upon the global mobility management protocol. Therefore, we introduce our proposed network-based localized mobility management mechanism, in which the fast handoff method is used in the PMIPv6 protocol. Using the analytical model, we study the effect of cells number in a domain on location update cost. Numerical evaluation result shows that the proposed scheme can improve performance of the previous protocols in location update cost.

Published
2009

121. HMIPv6-based handover optimized solution and performance analysis

Author

Jian Yingxia, Chen Zhi-xin, Wang Lixin, and Zheng Dawei

Subjects
Mobile radio, Engineering, business.industry, Network packet, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Real-time computing, Mobile computing, Soft handover, Handover, Mobile IP, Packet loss, Mobile telephony, business, Computer network
Abstract

Mobile IP networks suffer high binding update traffic from high rates of handoffs and long packet delivery delay from the large distance to the home network. In this paper, we introduce a MIPv6-based handover optimized solution for inter-domain handover management to reduce the binding update and packet delivery delay and traffic. In contrast with the normal HMIP protocol, the method can largely reduce the handoff latency and packets loss. Then based on the balance of the wireless link efficiency and the packet loss ratio, how the agent advertisement period affects the handoff performance in our proposal is analyzed. Finally, we obtain the optimal agent advertisement period of our handover optimized solution.

Published
2009

139. Docetaxel, Cisplatin and Fluorouracil (DCF) Regimen Compared with Non-Taxane-Containing Palliative Chemotherapy for Gastric Carcinoma: A Systematic Review and Meta-Analysis

Author

Chen, Xiao-Long, primary, Chen, Xin-Zu, additional, Yang, Chen, additional, Liao, Yan-Biao, additional, Li, He, additional, Wang, Li, additional, Yang, Kun, additional, Li, Ka, additional, Hu, Jian-Kun, additional, Zhang, Bo, additional, Chen, Zhi-Xin, additional, Chen, Jia-Ping, additional, and Zhou, Zong-Guang, additional

Published
2013
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145. Impact of Perioperative Blood Transfusion on Postoperative Complications and Prognosis of Gastric Adenocarcinoma Patients with Different Preoperative Hemoglobin Value.

Author

Xue, Lian, Chen, Xiao-Long, Wei-Han, Zhang, Yang, Kun, Chen, Xin-Zu, Zhang, Bo, Chen, Zhi-Xin, Chen, Jia-Ping, Zhou, Zong-Guang, and Hu, Jian-Kun

Subjects
STOMACH cancer patients, ADENOCARCINOMA, BLOOD transfusion, STOMACH cancer, HEMOGLOBINS, PERIOPERATIVE care, DISEASE complications, PATIENTS, PROGNOSIS
Abstract

Background. The impact of perioperative blood transfusion on the prognosis of gastric adenocarcinoma patients is still controversial. The aim of this study was to elucidate the impact of perioperative blood transfusion on postoperative complications and prognosis of patients who underwent gastrectomy for gastric adenocarcinoma with different levels of preoperative hemoglobin value (POHb). Method. From 2003 to 2011, 1199 patients who underwent curative gastrectomy were retrospectively enrolled and followed up to December 2014. Clinicopathological features and survival outcomes were compared between transfused and nontransfused patients. Results. In this study, transfused patients had more postoperative complications than nontransfused ones (P=0.002). In survival analysis, the difference was not significant between transfused and nontransfused patients with POHb between 70 and 100 g/L (P=0.191). However, in patients with POHb >100 g/L, transfused patients had significantly worse prognosis (P<0.001), especially in TNM III stage patients (P=0.002). And intraoperative blood transfusion predicted poor prognosis (P=0.001). Conclusion. Perioperative blood transfusion might lead to poor survival in gastric adenocarcinoma patients with POHb >100 g/L and transfused patients had more postoperative complications; thus it is better to refrain from unnecessary perioperative blood transfusion especially intraoperative transfusion. [ABSTRACT FROM AUTHOR]

Published
2015
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