TRACK: An algorithm for fault-tolerant,dynamic and scalable 2D mesh network-on-chip routing reconfiguration

Network-on-chip (NoC) is a reliable and scalable on-chip interconnect solution particularly used for MPSoCs and CMPs. Increasing susceptibility of NoC to failures is becoming a new research concern. Failures in components such as on-chip link or router may disrupt the underlying routing function. Reconfiguration of routing function is required to sustain network connectivity while maintaining deadlock-freedom in event of failure(s). Existing approaches either use routing tables or meta-data or involve all network nodes for participation in the reconfiguration process. This paper proposes TRACK, an algorithm for fast and scalable routing reconfiguration. It uses logic-based routing instead of tables and identifies affected nodes (i.e., rows/columns of mesh network) by single and double-link failures. In the proposed algorithm, reconfiguration is needed only for the affected nodes and the remaining network can continue to work. TRACK outperforms the existing one and reduces latency up to 42% and improves throughput up to 22% for single and double-link failures in 8 × 8 2D mesh network-on-chip. By employing logic-based routing, hardware cost is also reduced, i.e., 30% in area and 29.5% in power overhead for a 16 × 16 mesh router.     

丽水通济堰灌区水利管理体系的演进与启示

我国水土资源状况和自然条件决定了灌溉工程在农业经济发展中的重要地位,历史上保留下来许多尚在使用的古代灌溉工程,它们可持续效益的发挥不仅是因为完善的工程体系,更有赖于科学的管理,而地方水利管理组织的构建对管理制度的执行起着至关重要的作用。本文以拥有1 500年灌溉效益的浙江丽水通济堰工程为例,对灌区水利管理进行历史考察,并结合不同时期的工程发展状况与人文环境等因素,阐释历代水利管理体系的特点与演进。研究有助于认知古代灌区工程管理中的科学价值,以为现代灌区管理的完善提供历史借鉴。     

Research of CdZnTe detector based portable energy dispersive spectrometer

A kind of excellent CdZnTe crystal has been grown in Yinnel Tech, Inc. in recent years. Based on these CdZnTe crystals and some new techniques, a portable energy-dispersive spectrometer has been constructed which has yielded good results. CdZnTe detector has a 3% relative resolution in high-energy field and can detect gamma rays at room temperature. An integrated circuit based on preamplifier and shaping amplifier chips is connected to the detector. Voltage pulses are transformed into digital signals in MCA （multichannel analyzer） and are then transmitted to computer via USB bus. Data process algorithms are improved in this spectrometer. Fast Fourier transform （FFT） and numerical differentiation （ND） are used in energy peak＇s searching program. Sampling-based correction technique is used in X-ray energy calibration. Modified Gaussian-Newton algorithm is a classical method to solve nonlinear curve fitting problems, and it is used to compute absolute intensity of each detected characteristic line.     

南水北调中线京石段工程闸站机电设备检修策略

通过分析比较故障检修、定期检修、状态检修及改进性检修4种设备检修策略的优缺点和适用范围,并结合南水北调中线京石段工程闸站机电设备的实际情况,提出了一种适合当前工程机电设备检修管理的检修策略,即定期检修为主、点检定修为辅,结合故障检修的检修策略.     

分层型水库取水水温量纲分析及其影响因素研究

水温分层作为影响库区水生生态系统的重要因素逐渐成为研究热点。影响下泄水温的主要因素包括:坝前水温梯度、取水水头、取水流量、取水口宽度、温跃层厚度、重力加速度等。通过量纲分析法,基于π定理尝试建立了溢流式分层取水下泄水温估算模型。采用SAS 9.3统计软件对实验数据进行了回归分析,提出了下泄水温估算方程,相关系数达到95.6%。研究结果表明,水温梯度项为下泄水温估算的最主要因素,其次为取水水头项,最后为流量项;随着坝前水温温跃层强度增大,下泄水温升高,且强度越大,对下泄水温的影响越显著;下泄水温随取水水头的增加而降低,下泄水温降低幅度明显小于取水水头变幅;当取水流量逐渐增大时,下泄水温逐渐升高,但取水流量大于临界值时,下泄水温转而表现出缓慢下降趋势;在本文研究范围内,估算方程可以用于较好地预测下泄水温,预测结果与实验数据的相关系数为99.4%。     

Cyclic job scheduling in paced assembly lines with cross-trained workers

Paced or synchronous assembly lines allow concurrent manufacturing of a mix of products by repetitive production of a minimal product set (MPS). We refer to the associated production schedules as cyclic. We consider a paced assembly line where every job (or order) visits all m assembly stations in the same sequence and spends the same amount of time (known as the production cycle) at each station, by using the appropriate number of workers. Hence, associated with each job is an m-tuple of workforce requirements. Our objective is to find a cyclic schedule of jobs such that the total required workforce size is minimized. Assuming that each worker is cross-trained to work at a number of stations, we show that the problem is strongly NP-complete. In light of this result, we develop lower bounds, heuristic algorithms and an optimal branch-and-bound procedure. Our computational experiments show that our algorithms are computationally efficient and exhibit near-optimal performance. We also compare the savings in workforce size among systems with various levels of cross training.     

Antitrypanosomal activity of a new triazine derivative, SIPI 1029, In vitro and in model infections

A recently developed diaminotriazine derivative [O,O'-bis(1, 2-dihydro-2,2-tetramethylene-4,6-diamino-S-triazin-1-yl)-1, 6-hexanediol dihydrochloride; T-46; SIPI 1029] was examined for activity against African trypanosomes in in vitro and in vivo model systems. In vitro, SIPI 1029 was 50% inhibitory for growth of bloodstream trypomastigotes of four strains of Trypanosoma brucei brucei and Trypanosoma brucei rhodesiense at 0.15 to 2.15 nM (50% inhibitory concentrations). In in vivo mouse laboratory models of T. b. rhodesiense clinical isolate infections, SIPI 1029 was curative for 12 of 13 isolates at /=60% curative, and in six of these, a dose of /=60% cure rates. A number of these isolates were resistant to the standard trypanocide melarsoprol (Arsobal) and/or the diamidines diminazene aceturate (Berenil) and pentamidine. SIPI 1029 was also curative in combination with DL-alpha-difluoromethylornithine (Ornidyl) in a T. b. brucei central nervous system model infection. Some evidence of toxicity was found in dosage regimens of 10 mg/kg/day for 2 or 3 days in which deaths were observed in 6 of 65 animals given this dosage regimen. The activity of SIPI 1029 in this study indicates that this class of compounds (diaminotriazines) should be explored as leads for new human and veterinary trypanocides.     

A decision support systems approach to adjust maintenance float system availability levels

In this paper, a decision support system (DSS) is designed to predict the system availability levels for equipment maintenance float problems. The DSS is developed by using the analytic hierarchy process (AHP) to prioritize the improvements made in the maintenance management practice through the adoption of total quality management (TQM). The resulting regression metamodel can be used to predict and explain system availability. Sensitivity analysis can be easily generated through the DSS. The application of this DSS helps to effectively control the cost of maintenance floats as a result of TQM implementation, generates quick solutions, and provides the decision maker with the flexibility of carrying out sensitivity analysis and planning for the future by looking at the long-term impacts of TQM on the maintenance float system.     

Clinical diagnosis and management of hormonally responsive oral pregnancy tumor (pyogenic granuloma)

OBJECTIVE: To present a review of our experience and that of the medical literature in the diagnosis and management of oral pregnancy tumor (pyogenic granuloma), the natural History of the disease, its hormonal etiology, histopathologic features and management strategies. STUDY DESIGN: Medical literature review. RESULTS: This common, benign, hyperplastic oral mucosal lesion is much less familiar to gynecologists and obstetricians than to dentists. CONCLUSION: For practitioners engaged in primary care obstetrics and gynecology, routine oral examination and proper identification of pyogenic granuloma are important to avoid misdiagnosis and overtreatment.     

Monitoring energy consumption in single-family houses

A technical and statistical solution to the problem of obtaining timely and reliable estimates of end-use energy consumption in single-family houses is presented. This approach is called `The Energy Barometer' to allude to its possibility to follow the `pressure' on the energy market. Recently developed Internet-based communication techniques are used to monitor building energy end-use at short time-intervals. We describe how this new technology is combined with statistical methods based on Energy Signature models into a system. Measured energy use from a random sample of houses is standardized for each investigated house by (i) statistically regressing energy data against climate data and (ii) using climate data for a `normal' year together with the obtained regression equation to determine average annual energy use. The results are generalized to apply for the studied building stock by using a weighting procedure.