排序方式: 共有34条查询结果,搜索用时 15 毫秒
1.
Chung-Yu Wu Cheng-Ta Chiang 《IEEE sensors journal》2004,4(4):510-518
In this work, a new structure of low-photocurrent CMOS retinal focal-plane sensor with pseudo-BJT smoothing network and adaptive current Schmitt trigger is proposed. The proposed structure is very simple and compact. This new circuit can easily be implemented in CMOS technology with a small chip area. Another innovation of this circuit is that the proposed circuit could be operated for low-induced current levels (pA), and the current hysteresis of the proposed current Schmitt trigger could be adjusted adaptively according to the value of induced photocurrents. In this work, the detection of static and moving objects, such as a moving white bar, are proven by projecting a pattern through HSPICE simulation. The proposed retinal focal-plane sensor includes a 32 /spl times/ 32 pixel array with a pixel size of 70 /spl times/ 70 /spl mu/m/sup 2/. The fill factor is 75% and the total chip area is 3000 /spl times/ 3030 /spl mu/m/sup 2/. It is with fully functional 32 /spl times/ 32 implementations consuming less than 8.8 /spl mu/W per pixel at 3.3 V. Measurement results show that the proposed new retinal focal-plane sensor has successfully been used in character recognition of scanner systems, such as pen scanners, etc. 相似文献
2.
3D integration provides a promising solution to achieve system level integration with high function density, small form factor, enhanced transmission speed and low power consumption. Stacked bonding is the key technology to enable the communication between different strata of the 3D integration system. Low temperature bonding approaches are explored in industry to solve the performance degradation issue of the integrated devices. In this paper, various low temperature bonding technologies are reviewed and introduced, as well as the latest developments in world-wide companies and research institutes. The outlook for industrial application is also addressed in the paper. 相似文献
3.
Peer-to-Peer Networking and Applications - Information hiding refers to concealing data into cover media to prevent the private message from being stolen in peer-to-peer networks, mobile... 相似文献
4.
Cheng-Ta Yang 《Numerical Heat Transfer, Part A: Applications》2013,63(2):120-143
Simulation of the microphone membrane determines whether highest sensitivity is attainable when it comes to the field of microelectromechanical system (MEMS) microphone design. The reproducing kernel particle method is introduced to simulate a MEMS microphone membrane in viscothermal fluid. The result from a numerical axisymmetry model of 1 mm radius and 10 μm thickness membrane with a fixed boundary condition upon 1 mm thickness viscothermal air is identical to that from the theoretical model. Finally, a MEMS axisymmetry model of a 180 μm radius and 10 μm thickness membrane upon 10 μm thickness viscothermal air is simulated here. 相似文献
5.
Chih-Shun Ding Cheng-Ta Hsieh Pedram M. 《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》2000,8(5):584-593
In this paper, we propose two efficient statistical sampling techniques for estimating the total power consumption of large hierarchical circuits. We first show that, due to the characteristic of the sampling efficiency in Monte Carlo simulation, granularity of samples is an important issue in achieving high overall efficiency. The proposed techniques perform sampling both temporally (across different clock cycles) and spatially (across different modules) so that a smaller sample granularity can be achieved while maintaining the normality of samples. The first proposed technique, which is referred to as the module-based approach, samples each module independently when forming a power sample. The second technique, which is referred to as the cluster-based approach, lumps the modules of a hierarchical circuit into a number of clusters on which sampling is then performed. Both techniques adapt stratification to further improve the efficiency. Experimental results show that these techniques provide a reduction of 23× in simulation run time compared to existing Monte-Carlo simulation techniques 相似文献
6.
Shih-Hong Li Min-Hsien Wu Hung-Ming Wang Ping-Chih Hsu Yueh-Fu Fang Chih-Liang Wang Hui-Chun Chu Hung-Chih Lin Li-Yu Lee Ching-Yang Wu Cheng-Ta Yang Jen-Shi Chen Jason Chia-Hsun Hsieh 《International journal of molecular sciences》2022,23(18)
Background: We developed a hybrid platform using a negative combined with a positive selection strategy to capture circulating tumor cells (CTCs) and detect epidermal growth factor receptor (EGFR) mutations in patients with metastatic lung adenocarcinoma. Methods: Blood samples were collected from patients with pathology-proven treatment-naïve stage IV lung adenocarcinoma. Genomic DNA was extracted from CTCs collected for EGFR mutational tests. The second set of CTC-EGFR mutational tests were performed after three months of anti-cancer therapy. Results: A total of 80 samples collected from 28 patients enrolled between July 2016 and August 2018. Seventeen patients had EGFR mutations, including Exon 19 deletion (n = 11), L858R (n = 5), and de-novo T790 and L858R (n = 1). Concordance between tissue and CTCs before treatment was 88.2% in EGFR- mutant patients and 90.9% in non-mutant patients. The accuracy, sensitivity, specificity, positive predictive value, and negative predictive value of EGFR mutation tests for CTCs were 89.3%, 88.2%, 90.9%, 93.8%, and 83.3%, respectively. Conclusions: CTCs captured by a hybrid platform using a negative and positive selection strategy may serve as a suitable and reliable source of lung cancer tumor DNA for detecting EGFR mutations, including T790M. 相似文献
7.
Yi-Kuei Lin Cheng-Fu Huang Cheng-Ta Yeh 《International journal of systems science》2016,47(6):1421-1432
In supply chain management, satisfying customer demand is the most concerned for the manager. However, the goods may rot or be spoilt during delivery owing to natural disasters, inclement weather, traffic accidents, collisions, and so on, such that the intact goods may not meet market demand. This paper concentrates on a stochastic-flow distribution network (SFDN), in which a node denotes a supplier, a transfer station, or a market, while a route denotes a carrier providing the delivery service for a pair of nodes. The available capacity of the carrier is stochastic because the capacity may be partially reserved by other customers. The addressed problem is to evaluate the system reliability, the probability that the SFDN can satisfy the market demand with the spoilage rate under the budget constraint from multiple suppliers to the customer. An algorithm is developed in terms of minimal paths to evaluate the system reliability along with a numerical example to illustrate the solution procedure. A practical case of fruit distribution is presented accordingly to emphasise the management implication of the system reliability. 相似文献
8.
Yean-Fu Wen Frank Yeong-Sung Lin Yeong-Cheng Tzeng Cheng-Ta Lee 《Wireless Personal Communications》2010,53(2):211-233
In scalable last-mile broadband networks such as wireless mesh networks (WMNs), quality-of-service (QoS) concerns are vital
to multimedia applications such as video-conferencing and voice over IP (VoIP). Crucial decisions involve the number of backhauls
that are to be deployed as well as the optimal assignment of paths and bandwidths. We focus on cost effectiveness and QoS
requirements to develop a solution based on Lagrangean Relaxation and the subgradient method. Our approach satisfies QoS demands
and minimizes costs more effectively than general algorithms, as demonstrated by our experimental results. 相似文献
9.
Computer network is a major tool to transmit data in our modern society. How to evaluate and enhance network reliability is thus an important issue for organizations, especially to maximize network reliability. A computer network is a multistate network in which each edge has several possible capacities with a probability distribution and may fail. The multistate network reliability is the probability that the maximal flow is no less than a given demand. From the standpoint of quality management, a further problem is to reassign the existing resources for maximizing multistate network reliability without changing the network topology. Hence, this paper focuses on the resource assignment problem to propose an efficient approach based on the simple genetic algorithm. In which, a resource assignment is represented as a chromosome and the corresponding multistate network reliability is the fitness value of the chromosome. The experimental results show that the proposed algorithm can derive the optimal resource assignment in a reasonable time. 相似文献
10.
From the supply chain management perspective, this paper focuses on evaluating network reliability of a stochastic-flow distribution network (SFDN) under the delivery spoilage consideration. An SFDN is composed of nodes and routes, where each node denotes a supplier, a transfer center, or a market, and each route connects a pair of nodes. Along each route, there is a carrier whose available capacity is stochastic. Moreover, goods may rot or be spoilt during delivery due to traffic accidents, collisions, natural disasters, weather, time, etc., and thus the intact goods may not satisfy the market demand. Network reliability is defined as the probability that the SFDN can satisfy the market demand under the delivery spoilage consideration and the delivery budget constraint, and can be regarded as a performance index for distribution activity in supply chain management. An algorithm is developed in terms of minimal paths to evaluate network reliability. A numerical example is given to illustrate the solution procedure. Then a practical case of fruit distribution is presented to emphasize the management implication of network reliability. 相似文献