研华RAID-500型大存储容量冗余磁盘阵列机箱

您为您有限的空间而感到苦恼吗?请不用急,研华最新推出的RAID-500型大存储容量冗余机箱,可使您的烦恼一扫而光,它是一种5U高的架装式结构,RAID-500型具有以下特点:电源的冗余设计和系统报警检测,对于象CT和网络等大容量存储应用场合,它是一种非常理想的选择。

基于ADSP-TS101S的高速通用DSP板的实现

讨论了一种基于ADSP-TS101S的具有大存储容量的高速并行数字信号处理板的实现。该信号处理板采用松耦合结构,具有简洁的输入输出接口,具备大容量存储能力,并可以通过ISA总线与微机通信,板上时序通过CPLD控制。它具有很强的灵活性,能够适用于许多需要高速DSP处理的应用场合,完成高速实时信号处理任务。

电视台全媒体播控中心发展简析

要在传统电视与新媒体电视两个方面齐头并进的媒体企业,必须将传统的播控部门改造为既能够为传统播控服务也能够为新媒体电视服务,能够将两者融合交互的新型全媒体播控中心。本文以湖南广播电视台为例,对全媒体播控中心的发展和建设做了思考和探索。

An Ultra-Low-Power Embedded EEPROM for Passive RFID Tags

An ultra-low-power,256-bit EEPROM is designed and implemented in a Chartered 0.35μm EEPROM process. The read state power consumption is optimized using a new sense amplifier structure and an optimized control circuit. Block programming/erasing is achieved using an improved control circuit. An on silicon program/erase/read access time measurement design is given. For a power supply voltage of 1.8V,an average power consumption of 68 and 0.6μA for the program/erase and read operations,respectively,can be achieved at 640kHz.

A Novel Charge-Transfer Matching Cell for High-Precision Correlation and Low-Power

A novel matching cell circuitry using charge transfer circuit technique for high precision correlation calculation is presented.The cell calculates the absolute value of the difference between two analog input voltages and amplifies the result.Amplification gain can be designed by the capacitance size in the cell and threshold voltage mismatch can be canceled automatically,thus high precision operation of the circuit is achieved.The circuit can be operated with low power dissipation of about 12μW at a frequency of 50MHz.Because of its simple structure and small silicon area,the matching cell is suitable to realize the correlation dealing with many template vectors that have many elements in a chip.

Simulation of strain induced abnormal grain growth in aluminum alloy by coupling crystal plasticity and phase field methods

A mesoscale modeling methodology is proposed to predict the strain induced abnormal grain growth in the annealing process of deformed aluminum alloys. Firstly, crystal plasticity finite element(CPFE) analysis is performed to calculate dislocation density and stored deformation energy distribution during the plastic deformation. A modified phase field(PF) model is then established by extending the continuum field method to consider both stored energy and local interface curvature as driving forces of grain boundary migration. An interpolation mapping approach is adopted to transfer the stored energy distribution from CPFE to PF efficiently. This modified PF model is implemented to a hypothetical bicrystal firstly for verification and then the coupled CPFE-PF framework is further applied to simulating the 2D synthetic polycrystalline microstructure evolution in annealing process of deformed AA3102 aluminum alloy.Results show that the nuclei with low stored energy embedded within deformed matrix tend to grow up, and abnormal large grains occur when the deformation is close to the critical plastic strain, attributing to the limited number of recrystallized nuclei and inhomogeneity of the stored energy.

Design of 32-bit differential paired eFuse OTP memory in a form of two-dimensional array

A differential paired eFuse OTP(one-time programmable)memory cell which can be configured into a 2D(two-dimensional)eFuse cell array was proposed.The sensible resistance of a programmed eFuse link is a half smaller than that of the single-ended counterpart and BL datum can be sensed without a reference voltage.With this 2D array of differential paired eFuse OTP memory cells,we design a 32-bit eFuse OTP memory IP.We use a sense amplifier based D F/F circuit as the BL(bit-line)SA(sense amplifier)and design a sensing margin test circuit with a variable pull-up load.It is confirmed by the function test that the designed 32-bit OTP memory IP functions normally on 30 sample dies.

A Cogeneration System for an Apartment Building Based on Distributed Heat Storage Technology

In order for economically viable distributed generation systems for apartment buildings to spread, it is essential to develop an efficient and low-cost heat supply system. We have developed a new eogeneration system called the Neighboring Cogeneration system （NCG）. The key concept of this system is to install a heat accumulator with a hot water supply and a room heating function at each household and to connect different households by a single loop of hot water pipe. As a result, time leveling of the heat supply and heat transferring among households becomes possible. Thus, the costs of the pipe and the heat source equipment decrease. Furthermore, because all of the heat accumulators store heat, the total heat storage capacity is large enough for cogeneration to generate exhaust heat according to the electricity demand and with a high operating rate. In this paper, we report the results of the NCG system for 7 lived-in households. The controlling system worked efficiently. All of the households were able to use hot water without any difficulties. Further, we report the results of the energy saving effect of the NCG system for 50 lived-in households by means of a simulation based on the experimental results for NEXT21.

Safety Aspects of Sustainable Storage Dams and Earthquake Safety of Existing Dams

The basic element in any sustainable dam project is safety, which includes the following safety elements： O structural safety, dam safety monitoring, operational safety and maintenance, and emergency planning. Long-term safety primarily includes the analysis of all hazards affecting the project; that is, hazards from the natural environment, hazards from the man-made environment, and project-specific and site-specific hazards. The special features of the seismic safety of dams are discussed. Large dams were the first structures to be systematically designed against earthquakes, starting in the 1930s. How- ever, the seismic safety of older dams is unknown, as most were designed using seismic design criteria and methods of dynamic analysis that are considered obsolete today. Therefore, we need to reevaluate the seismic safety of existing dams based on current state-of-the-art practices and rehabilitate deficient dams. For large dams, a site-specific seismic hazard analysis is usually recommended. Today, large dams and the safety-relevant elements used for controlling the reservoir after a strong earthquake must be able to withstand the ground motions of a safety evaluation earthquake. The ground motion parameters can be determined either by a probabilistic or a deterministic seismic hazard analysis. During strong earthquakes, inelastic deformations may occur in a dam; therefore, the seismic analysis has to be car- ried out in the time domain. Furthermore, earthquakes create multiple seismic hazards for dams such as ground shaking, fault movements, mass movements, and others. The ground motions needed by the dam engineer are not real earthquake ground motions but models of the ground motion, which allow the safe design of dams. It must also be kept in mind that darn safety evaluations must be carried out several times during the long life of large storage dams. These features are discussed in this paper.

Seasonal coolth storage system for residential buildings in Australia

Night sky cooling is explored as an alternative to the conventional cooling technologies using fossil fuels. The night sky cooling method is based on the long wave radiation of unglazed collectors to the sky at night. An evaluation of the night sky cooling system is present for a residential building in three cities of Australia, namely Alice Springs, Darwin and Melbourne. The system comprises an unglazed flat plate solar collector integrated with borehole storage. It uses night sky radiation to reduce the temperature of the ground near to the boreholes. The system was simulated with TRNSYS, a transient simulation program. The simulation results for adequately sized systems show that night sky radiation is able to reduce the coolth storage borehole temperature and the proposed system is able to meet the cooling load of the residential building simulated in three locations. Borchole lengths of 270, 318 and 106 m are required for coolth storage with 90, 260 and 14 m2 collector area for heat rejection in Alice Springs, Darwin and Melbourne, respectively. At the 20th simulation year, the proposed system is able to achieve a system cooling coefficient of performance of 2.2 in Alice Springs, and 2.8 in Darwin and Melbourne.

Study on Optimal Fermentation and Storage Time of Soybean Food （Thua-Nao）in Thailand

The soybean cultivar Tadang Muangpai was used to improve the productive quality of Thua-Nao and reduce the concentration of aflatoxin to less than 20 ppb. It was conducted at CMFCRC, Chiangmai, Thailand between Dec. 2006 and Mar. 2007. Soybean was boiled for 5 hours and then fermented at different time to create natural bacterial species, mainly Bacillus spp. Thua-Nao could be stored up to 90 days after in storage. Nutritional value, food value, and microorganisms content were investigated during fermentation and storage. Also, aflatoxin content of Thua-Nao was recorded during storage. The results showed that 3 days of soybean fermentation gave the best performance of Thua-Nao in term of nutritional value （protein = 47.12%）, food value, and content of Bacillus spp. （2.78 × 10^9 CFU/g）. Without being harmed from aflatoxin, Thua-Nao could be stored not more than 23 days in normal room （Tmax. = 33.9 ℃, Tmin. = 15.8 ℃） and not more than 36 days in climate-controlled room （Tmax. = 20 ℃, Tmin. = 15 ℃）.

Runoff and Sediment Load from the Right Bank Valleys of Mosul Dam Reservoir

Mosul Dam is a Multipurpose Project on the River Tigris in Iraq with 11.11 billion m3 storage capacity. It is used to store the water for irrigation, hydropower generation, and flood control. As in other dams in the world, this dam also have sedimentation problem. Sediment accumulation in its reservoir can effect the dam operation （pumping station, hydropower plants, and bottom outlets） and it will definitely shorten the life span of the dam. In this study, the SWAT （soil and water assessment tool） under （]IS （Geographical Information System） was applied to simulate the yearly surface rtmoff and sediment load for the main three valleys on the right bank of Mosul Dam Reservoir. The simulation considered for the twenty one years begin from the dam operation in 1988 to 2008. The resultant values of the average annual sediment load are 35.6~ 103, 4.9 ~ 103, and 2.2~ 103 ton, while the average values of sediment concentration are 1.73, 1.65, and 2.73 kg/m3 for the considered valleys one, two and three respectively. This implies that significant sediment load enters the reservoir from these valleys. To minimize the sediment load entering the reservoir, a check dam is to be constructed in suitable sites especially for valley one. The check dam can store the runoff water and trap the sediment load, and then the flow can be released to the reservoir.

容量加密:大密钥等长加密

加密、解密和破解,随着信息技术发展变得愈加重要。经典加密法常诉诸于算法复杂性。文中提出,应充分利用大容量存储技术的快速发展,在小体积的存储介质中存放巨量密钥,从而达到加密文件的密钥始终长于被加密文件,密文不可能被任何算法和工具破解的理论安全性。文中指出大存储下的大密钥等长加密,是未来加密技术的关键发展方向。

基于彩色液晶屏的出租车计价器设计

本文设计了一种新型的基于彩色液晶显示屏的出租车计价器,文中给出了该计价器的硬件和软件设计方案,其中硬件部分包括里程信号输入电路、彩屏显示电路、存储电路、实时时钟等模块,软件部分主要由BOOTLOADER和应用程序两大部分组成。该计价器集计程、计价、彩显、存储、打印、语音播报等多种功能于一体,设计超前,可扩充性强。与传统计价器相比,该计价器中文菜单、显示内容后期可调、计费准确、可靠实用。

Big data storage technologies： a survey

There is a great thrust in industry toward the development of more feasible and viable tools for storing fast-growing volume, velocity, and diversity of data, termed ＇big data＇. The structural shift of the storage mechanism from traditional data management systems to NoSQL technology is due to the intention of fulfilling big data storage requirements. However, the available big data storage technologies are inefficient to provide consistent, scalable, and available solutions for continuously growing heterogeneous data. Storage is the preliminary process of big data analytics for real-world applications such as scientific experiments, healthcare, social networks, and e-business. So far, Amazon, Google, and Apache are some of the industry standards in providing big data storage solutions, yet the literature does not report an in-depth survey of storage technologies available for big data, investigating the performance and magnitude gains of these technologies. The primary objective of this paper is to conduct a comprehensive investigation of state-of-the-art storage technologies available for big data. A well-defined taxonomy of big data storage technologies is presented to assist data analysts and researchers in understanding and selecting a storage mecha- nism that better fits their needs. To evaluate the performance of different storage architectures, we compare and analyze the ex- isling approaches using Brewer＇s CAP theorem. The significance and applications of storage technologies and support to other categories are discussed. Several future research challenges are highlighted with the intention to expedite the deployment of a reliable and scalable storage system.

Self-assembled α-MnO2 urchin-like microspheres as a high-performance cathode for aqueous Zn-ion batteries

Aqueous Zn-ion batteries(AZIBs)are one of the promising battery technologies for the green energy storage and electric vehicles.As one attractive cathode material for AZIBs,α-MnO2 materials exhibit superior electrochemical properties.However,their long-term reversibility is still in great suspense.Considering the decisive effect of the structure and morphology on theα-MnO2 materials,hierarchicalα-MnO2 materials would be promising to improve the cycle performance of AZIB.Here,we synthesized theα-MnO2 urchin-like microspheres(AUM)via a self-assembled method.The porous microspheres composed of one-dimensionalα-MnO2 nanofibers with high crystallinity,which improved the surface area and active sites for Zn2+intercalation.The AUM-based AZIB realized a high initial capacity of 308.0 mA hg-1,and the highest energy density was 396.7 W hkg-1.The kinetics investigation confirmed the high capacitive contribution and fast ion diffusion of the AUM.Ex-situ XRD measurement further verified the synergistic insertion/extraction of H+and Zn2+ions during the charge/discharge process.The superiority of the AUM guaranteed good electrochemical performance and reversible phase evolution,and this application would promote the follow-up research on the advanced AZIB.

Sediment storage and morphology of the Yalu Tsangpo valley due to uneven uplift of the Himalaya

The fluvial process of the Yalu Tsangpo River occurs concurrently with the uplift of the Qinghai-Tibet Plateau.Therefore,the river exhibits unique features in morphology and sediment deposition.Field investigations were performed from 2009–2011and the depth of the interface between the sediment deposits and bed rock was detected with an electromagnetic imaging system(EH4)at 29 cross sections.Sediment deposits were sampled along the Yalu Tsangpo valley from Xietongmen to the Yalu Tsangpo Canyon.The results show that a huge amount of sediment has been deposited in four wide valley sections because the uplift rate in these sections was lower than that in the downstream gorge sections over the past million years.About 518 billion m3of gravel and sand have been stored in the high mountain river valleys,which has changed the V-shaped mountain river valley into a U-shaped wide river valley in the four sections.In the sections with high uplift rates the river bed is incised and has formed gorges and the Yalu Tsangpo Canyon.

Segmented cylindrical vector beams for massively-encoded optical data storage

The possibility to achieve unprecedented multiplexing of light-matter interaction in nanoscale is of virtue importance from both fundamental science and practical application points of view. Cylindrical vector beams(CVBs) manifested as polarization vortices represent a robust and emerging degree of freedom for information multiplexing with increased capacities. Here, we propose and demonstrate massivelyencoded optical data storage(ODS) by harnessing spatially variant electric fields mediated by segmented CVBs. By tight focusing polychromatic segmented CVBs to plasmonic nanoparticle aggregates, recordhigh multiplexing channels of ODS through different combinations of polarization states and wavelengths have been experimentally demonstrated with a low error rate. Our result not only casts new perceptions for tailoring light-matter interactions utilizing structured light but also enables a new prospective for ultra-high capacity optical memory with minimalist system complexity by combining CVB’s compatibility with fiber optics.

Protection status as determinant of carbon stock drivers in Cerrado sensu stricto

Aims Natural vegetation plays an important role in global carbon cycling and storage.Thus,the Cerrado(Brazilian savannah)is considered a carbon sink because of its intrinsic characteristics.Our aim was to evaluate how the aboveground biomass and biodiversity relationship change between three Cerrado remnants with different protection status:a‘control area’(Legal Reserve area),a protected area(PA)and a non-protected area(Non-PA).Methods All three studied fragments are situated in northern Minas Gerais state,Brazil.We estimated the aboveground carbon stocks based on the forest inventory.We also measured three dimensions of biodiversity metrics for each plot:functional trait dominance,taxonomic diversity and functional diversity.The following functional traits were evaluated for the species:wood density,maximum diameter and seed size.We carried out generalized linear models seeking to evaluate how carbon stocks,community-weighted mean(CWM)trait values,species richness and diversity,and functional diversity indices differ among the remnants.Important Findings The Cerrado areas without protection status had lower carbon stocks,species richness,species diversity,functional richness and functional dispersion,whereas both PA and Non-PA had lower CWM maximum diameter and seed size compared with the Legal Reserve control area.Generalized linear models showed that carbon stocks,species and functional richness metrics were correlated within and across sites,and thus,species richness could serve as a good proxy for functional richness and carbon stocks.The carbon stocks were positively driven by species richness and CWM maximum diameter,while they were negatively driven by functional dispersion.Functional richness,species diversity and CWM seed size appeared in the set of best models,but with no significant direct effect on carbon stocks.Thus,we concluded that absence of protection in the Cerrado areas decreases both species richness and carbon stocks.

New design of sense amplifier for EEPROM memory

We present a new sense amplifier circuit for EEPROM memory. The topology of the sense amplifier uses a voltage sensing method,having low cost and low power consumption as well as high reliability. The sense amplifier was implemented in an EEPROM realized with an SMIC 0.35-μm 2P3M CMOS embedded EEPROM process. Under the condition that the power supply is 3.3 V,simulation results showed that the charge time is 35 ns in the proposed sense amplifier,and that the maximum average current consumption during the read period is 40 μA. The novel topology allows the circuit to function with power supplies as low as 1.4 V. The sense amplifier has been implemented in 2-kb EEPROM memory for RFID tag IC applications,and has a silicon area of only 240 μm2.