Dongdong Zhao

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OBJECT The purpose of this paper is to elucidate the safety and efficacy of, and indications and outcome prognosis for endoscopic third ventriculostomy (ETV) in 58 patients with obstructive hydrocephalus. METHODS Between September 1999 and April 2003, 58 ETVs were performed in 58 patients with obstructive hydrocephalus (36 male and 22 female patients) at(More)
Sympathetic nerve sprouting is thought to contribute to sudden cardiac death (SCD) in chronic myocardial infarction (MI). However, the mechanisms remain unclear. This study investigated the relationship between sympathetic nerve sprouting and repolarization dispersion at peri-infarct zones after MI. Thirty adult New Zealand White rabbits underwent coronary(More)
This paper proposes a control technology of an ultra high speed centrifugal compressor for the air management of proton exchange membrane fuel cells (PEMFCs) for automotive applications. The mathematical model of the air management system (AMS) is validated experimentally. The implementation of a fast butterfly valve with a PI controller overcomes the(More)
In this paper, the mainly used packet scheduling algorithms in wireless communication system will be introduced. The 3<sup>rd</sup> Generation partnership long term evolution (3GPP LTE) will provide QoS guaranteed multimedia services which demand much higher downlink packet rate and lower HOL packet delay. So, a suitable packet scheduling algorithm is(More)
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This paper presents the modeling and control of an ultra high speed centrifugal compressor for the air management of proton exchange membrane fuel cell (PEMFC) systems. Centrifugal compressors have advantages of compactness, high efficiency, as well as low noise compared with other kinds of displacement compressors. Moreover, the ultra high speed technology(More)
Nowadays, data privacy has been widely concerned. The private set intersection means that several parties calculate the intersection of their private sets while without revealing extra information about their private data. The negative database (NDB) is a new technique for preserving privacy, and it stores information in the complementary set of a(More)
B,N-codoped carbon nanostructures (BNCS) can serve as alternative low-cost metal-free electrocatalysts for oxygen reduction reactions (ORR). However, the compensation effect between the p- (B atoms) and n-type (N atoms) dopants would make the covalent boron-nitride (BN) easily formed during the synthesis of BNCS, leading to a unsatisfactory ORR activity.(More)
A self-healing database system is a grand-challenge vision where the system will detect, diagnose, and repair software/hardware failures automatically. We identify performance-availability problems (PAPs) as an important target for self-healing, and develop techniques that enable database systems to recover automatically from common PAPs. PAPs can be caused(More)