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Three-dimensional UnderWater Acoustic Sensor Networks (UWASN) are supposed to be deployed for many applications. However, a protocol for sensors' self-localization and time-synchronization in UWASN remains a challenge problem. In this paper, we developed a multilateration algorithm which could reliably localize and synchronize underwater sensor networks by(More)
Now, an ad hoc network works well rely on other nodes in the network for discovering route and forwarding data packets. Most routing protocols are based on the assumption of cooperation and no cheat. If there are malicious nodes to attack network, these protocols would be broken down. In this paper, we propose the cooperative on-demand secure route (COSR)(More)
Multiparty conference is an important telephone service. However, today, the session initiation protocol (SIP) is primary used in point-to-point calls. SIP can support multi-party conferencing in many different ways. This article introduces some SIP conferencing architectures, their advantages, disadvantages and performance. According to centralized(More)
MicroRNAs (miRNAs) have been proven to play crucial roles in cancer, including tumor chemotherapy resistance and metastasis of non-small-cell lung cancer (NSCLC). TGFβ signal pathway abnormality is widely found in cancer and correlates with tumor proliferation, apoptosis and metastasis. Here, miR-17, 20a, 20b were detected down-regulated in A549/DDP cells(More)
Chemotherapy is an important therapeutic approach for non-small cell lung cancer (NSCLC). However, a successful long-term treatment can be prevented by the occurring of chemotherapy resistance frequently, and the molecular mechanisms of chemotherapy resistance in NSCLC remain unclear. In this study, abnormal expressions of miR-17 and miR-92 families are(More)
Cognitive radio networks allow opportunistic spectrum access and can significantly improve spectral efficiency. To achieve higher sensing accuracy, cognitive radio systems often require cooperation among secondary users. One of the most important aspects in collaborative spectrum sensing is the data fusion algorithm which combines the sensing results from(More)
With the broad implementation of Internet, VoIP poses an important role on the Internet and provides a new way to people to contact each other. As VoIP's cheapness and simpleness, many institutes forecast that VoIP emerges as next spam entryway like e-mail service. In this paper, we propose a novel schema, called P2P-AVS (anti-voice-spam), against spam call(More)
Recommendation systems mainly focus on three specific domain like that CB filtering, CF-based filtering and Context-aware filtering.In content filtering, using users publishing and Interaction with in social network to calculate the similarity between users.Then recommend items to a user. The multimedia services and contents in the Internet, People usually(More)