The primary focus of this paper is to design a progressive restoration plan for an enterprise data center environment following a partial or full disruption. Repairing and restoring disrupted components in an enterpri...The primary focus of this paper is to design a progressive restoration plan for an enterprise data center environment following a partial or full disruption. Repairing and restoring disrupted components in an enterprise data center requires a significant amount of time and human effort. Following a major disruption, the recovery process involves multiple stages, and during each stage, the partially recovered infrastructures can provide limited services to users at some degraded service level. However, how fast and efficiently an enterprise infrastructure can be recovered de- pends on how the recovery mechanism restores the disrupted components, considering the inter-dependencies between services, along with the limitations of expert human operators. The entire problem turns out to be NP- hard and rather complex, and we devise an efficient meta-heuristic to solve the problem. By considering some real-world examples, we show that the proposed meta-heuristic provides very accurate results, and still runs 600-2800 times faster than the optimal solution obtained from a general purpose mathematical solver [1].展开更多
Serious hearing and balance impairments can occur as a result of loss of hair cells related to aging, environmental stresses(such as noises exposure) or exposure to chemotherapeutic drugs(such as cisplatin and aminogl...Serious hearing and balance impairments can occur as a result of loss of hair cells related to aging, environmental stresses(such as noises exposure) or exposure to chemotherapeutic drugs(such as cisplatin and aminoglycoside antibiotics). Because a large portion of hearing impairment involves loss of hair cells, regeneration or replacement of these cells is a possible alternative to prosthetic devices1. Researchers have paid hot attention to the study of inner ear hair cell regeneration for hearing restoration for many years. Besides the important function of hair cells, there are many other contributors essential for normal hearing. Hair cell regeneration is one of the essential steps for total hearing recovery, but not the only one. In this article, we will review the progresses in research on hearing loss, stem cell application and hearing restoration.展开更多
Visual secret sharing has received more and more attention over the past years due to the fact that neither complex computation nor cryptographic knowledge is required to decrypt the secret image directly according to...Visual secret sharing has received more and more attention over the past years due to the fact that neither complex computation nor cryptographic knowledge is required to decrypt the secret image directly according to the characteristics of the human vision system. Considering the issue of sharing the secret image at multiple image resolutions with the meaningful shadows, in this paper, we present a friendly progressive visual secret sharing scheme without expanding the image size in the shadows and the reconstructed secret image based on applying a 2x2-sized block-wise operation to generate the shadows block by block. The proposed method can achieve these benefits： 1） the generated shadows are meaningful, and their sizes are not expanded, and 2） the secret image can be recovered at different resolutions by stacking different quantities of shadows together. The experimental results also show that the proposed method is superior to other compared schemes.展开更多
文摘The primary focus of this paper is to design a progressive restoration plan for an enterprise data center environment following a partial or full disruption. Repairing and restoring disrupted components in an enterprise data center requires a significant amount of time and human effort. Following a major disruption, the recovery process involves multiple stages, and during each stage, the partially recovered infrastructures can provide limited services to users at some degraded service level. However, how fast and efficiently an enterprise infrastructure can be recovered de- pends on how the recovery mechanism restores the disrupted components, considering the inter-dependencies between services, along with the limitations of expert human operators. The entire problem turns out to be NP- hard and rather complex, and we devise an efficient meta-heuristic to solve the problem. By considering some real-world examples, we show that the proposed meta-heuristic provides very accurate results, and still runs 600-2800 times faster than the optimal solution obtained from a general purpose mathematical solver [1].
基金the Beijing Scienceand Technology NOVA program Grant (No.2006B53)the Peking Union Medical CollegeHospital Junior Researcher Grant.
文摘Serious hearing and balance impairments can occur as a result of loss of hair cells related to aging, environmental stresses(such as noises exposure) or exposure to chemotherapeutic drugs(such as cisplatin and aminoglycoside antibiotics). Because a large portion of hearing impairment involves loss of hair cells, regeneration or replacement of these cells is a possible alternative to prosthetic devices1. Researchers have paid hot attention to the study of inner ear hair cell regeneration for hearing restoration for many years. Besides the important function of hair cells, there are many other contributors essential for normal hearing. Hair cell regeneration is one of the essential steps for total hearing recovery, but not the only one. In this article, we will review the progresses in research on hearing loss, stem cell application and hearing restoration.
文摘Visual secret sharing has received more and more attention over the past years due to the fact that neither complex computation nor cryptographic knowledge is required to decrypt the secret image directly according to the characteristics of the human vision system. Considering the issue of sharing the secret image at multiple image resolutions with the meaningful shadows, in this paper, we present a friendly progressive visual secret sharing scheme without expanding the image size in the shadows and the reconstructed secret image based on applying a 2x2-sized block-wise operation to generate the shadows block by block. The proposed method can achieve these benefits： 1） the generated shadows are meaningful, and their sizes are not expanded, and 2） the secret image can be recovered at different resolutions by stacking different quantities of shadows together. The experimental results also show that the proposed method is superior to other compared schemes.
