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Encryption technology is an important measure to ensure the security of digital image, this paper's main purpose is to research how to encrypt images by chaos. Based on analyzing traditional Logistic chaotic image encryption method, this paper proposed an improved encryption algorithm. The new algorithm produced nine chaotic sequences only by one(More)
OBJECTIVE To establish an animal model of chronic optic nerve injury which is suitable for experimental research. METHODS Dil, a tracer, was injected through the bone windows into the brain of 48 cats so as to mark the retinal ganglion cells (RGCs). Two weeks later the 48 cats were randomly divided into 6 equal groups. The normal group did not receive any(More)
Cryptococcal meningitis (CM) is a global disease with significant morbidity and mortality. Although low peripheral blood cluster of differentiation 4 (CD4) cell counts are found to be related to a high burden of cryptococcus in HIV-infected patients, little is known about possible immune defects in previously healthy patients (PHPs). We performed a(More)
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