摘要：The typical Haber technical process for industrial NH_(3)production involves plenty of energy-consumption and large quantities of greenhouse gas *** contrast,electrochemical N_(2)reduction proffers environment-friendly and energy-efficient avenues to synthesize NH_(3)at mild conditions but demands efficient electrocatalysts for the N_(2)reduction reaction(NRR).Herein we report for the first time that commercial indium-tin oxide glass(ITO/G)can be used as a catalyst electrode toward artificial N_(2)fixation,as it demonstrates excellent selectivity at mild *** ITO/G delivers excellent NRR performance with a NH_(3)yield of 1.06×10^(-10) mol s^(-1) cm^(-2) and a faradaic efficiency of 6.17%at-0.40 V versus the reversible hydrogen electrode(RHE)in 0.5 M ***,the ITO/G also possesses good electrochemical stability and ***,the possible reaction mechanism for the NRR on the ITO catalysts was explored using first-principles calculations.

摘要：In this paper, an ultra-low power adder cell is proposed. With cascading two XNOR cells, the sum of two inputs is achieved. Regarding to advantages of m-GDI XNOR cell, we constructed the adder cell based on this architecture. The simulation results show that the power consumption of the adder cell designed with GDI technology is 12.993 μw, whereas for this cell designed with m-GDI technology is 4.1628 μw, which both are designed at 0.18 um technology. Moreover, simulation results in 90 nm CMOS technology for m-GDI adder cell show average power consumption of 0.90262 μw and 6.3222 μw in 200 MHz and 2GHz, respectively.

摘要：Every year mushroom wastes are produced in big volumes from edible mushroom production industries. Vermicomposting technology using earthworms as versatile natural bioreactors for effective recycling of organic wastes to the soil is an environmentally acceptable means of converting waste into nutritious composts for crop production. This study was undertaken to use earthworms （eisenia foetida） in vermicomposting on edible mushrooms wastes. The Randomized block design with three treatments in Kimia, Sabalan and Artashahr mushroom production industries were selected and four replications were applied for treatments. The total biomass of earthworms was estimated by counting the number of adults, juveniles and cocoons from each replication. The number of adult and mature worms, egg capsules and wet weight of earthworms were recorded in one month intervals （totally in five months）. Vermicomposting was carried out by these worms in four months in spite of delay in their establishment in mushroom wastes. The worms wet weight, their number and the number of capsules were increased up to fourth month and then decreased. The produced vermicompost had suitable properties for amending soil.

摘要：以英国北爱尔兰Hayes的一块牧草地为研究区,将所有样点分为独立的训练和检验数据集,并在训练样点集的基础上设计了其他4种样点布局方案,以研究神经网络集成技术应用于田间土壤性质空间变异性的可能性。与广泛应用的克里格法的试验结果相比,集成BP神经网络的插值结果精度与之基本相当,尤其是在样点分布较稀疏和样点数较少的情况下,集成BP网络表现出明显的优势;由于神经网络集成方法对样本数据的分布没有任何要求,因此具有较广泛的应用前景和潜力,并在不符合克里格法对样本数据分布要求的情况下是一种可行的替代方法。

摘要：TLS(transport layer security)协议的基本设计目标是为两个通信实体之间提供数据的保密性和完整性.由于在传输层安全握手协议中最耗费计算资源的步骤是服务器RSA解密运算,优化的批处理的RSA方法提出可以用于加速 TLS 会话的初始化.首先指出了以前的批处理方法由于要求多证书实现而实用性不强.然后提出了单一证书策略的方法,从而克服了这一问题.还提出结合用户对于因特网服务质量的要求优化了批处理参数.为了选择优化的批处理的参数,不仅考虑了服务器的性能,而且还考虑了客户可容忍的等待时间.通过分析并在阐述平均排队时间、批处理服务时间和系统稳定性的基础上提出了一种新颖的优化批处理调度算法,已部署在服务器上.最后通过分析和模拟两种方法验证了所提出方案的实用性和有效性.

摘要：This paper presents the design of a low power LNA with second stage that uses a notch filter for DS-UWB application. The LNA employs a current reuse structure to reduce the power consumption and an active second order notch filter to produce band rejection in the 5 - 6 GHz frequency band. The input reflection coefficient S11 and output reflection S22 are both less than –10 dB. The maximum power gain S21 is 15 dB while the maximum rejection ratio is over –10 dB at 4.8 GHz. The minimum noise figure is 5 dB. The input referred third-order intercept point (IIP3) is –7 dBm at 6 GHz. The power consumption is 6.4 mW from a 1-V power supply.

摘要：理解铁电材料畴结构在低温条件下的翻转行为,对于铁电物理以及其在宽温域的应用都非常重要;然而,目前在低温条件下直接观测介观尺度下的畴翻转仍然面临着巨大的挑战.本论文利用铁酸铋(BiFeO_(3))作为模型来研究3.6–260 K温度范围内的铁电畴翻转行为.菱形相的BiFeO_(3)在温度为130 K时观测到了明显的铁电保持失效现象;这是因为BiFeO_(3)在130 K附近有较大的热释电系数,从而使其升温到该温度附近时释放了大量的热释电电荷,进而产生较强的退极化场,导致铁电极化翻转.另外,本论文还发现通过纳米尺度设计相界可以有效地抑制铁电保持失效.本研究为变温条件下,尤其是低温温域,研究铁电翻转提供了实验范式.

摘要：很多应用领域产生大量的序列数据.如何从这些序列数据中挖掘具有重要价值的模式,已成为序列模式挖掘研究的主要任务.研究这样一个问题:给定序列S、支持度阈值和间隔约束,从序列S中挖掘所有出现次数不小于给定支持度阈值的频繁序列模式,并且要求模式中任意两个相邻元素在序列中的出现位置满足用户定义的间隔约束.设计了一种有效的带有通配符的模式挖掘算法One-Off Mining,模式在序列中的出现满足One-Off条件,即模式的任意两次出现都不共享序列中同一位置的字符.在生物DNA序列上的实验结果表明,One-Off Mining比相关的序列模式挖掘算法具有更好的时间性能和完备性.

摘要：A grand challenge facing society is climate change caused mainly by rising CO_(2) concentration in Earth’s *** plants are linchpins in global carbon cycling,with a unique capability of capturing CO_(2) via photosynthesis and translocating captured carbon to stems,roots,and soils for long-term ***,many researchers postulate that existing land plants cannot meet the ambitious requirement for CO_(2) removal to mitigate climate change in the future due to low photosynthetic efficiency,limited carbon allocation for long-term storage,and low suitability for the *** address these limitations,there is an urgent need for genetic improvement of existing plants or construction of novel plant systems through biosystems design(or biodesign).Here,we summarize validated biological parts(e.g.,protein-encoding genes and noncoding RNAs)for biological engineering of carbon dioxide removal(CDR)traits in terrestrial plants to accelerate land-based decarbonization in bioenergy plantations and agricultural settings and promote a vibrant ***,we first summarize the framework of plant-based CDR(e.g.,CO_(2) capture,translocation,storage,and conversion to value-added products).Then,we highlight some representative biological parts,with experimental evidence,in this ***,we discuss challenges and strategies for the identification and curation of biological parts for CDR engineering in plants.

摘要：Long-segment defects remain a major problem in clinical treatment of tubular tissue *** design of tubular scaffold with desired structure and functional properties suitable for tubular tissue regeneration remains a great challenge in regenerative ***,we present a reliable method to rapidly fabricate tissueengineered tubular scaffold with hierarchical structure via 4-axis printing *** fabrication process can be adapted to various biomaterials including hydrogels,thermoplastic materials and thermosetting *** polycaprolactone(PCL)as an example,we successfully fabricated the scaffolds with tunable tubular architecture,controllable mesh structure,radial elasticity,good flexibility,and luminal *** a preliminary demonstration of the applications of this technology,we prepared a hybrid tubular scaffold via the combination of the 4-axis printed elastic poly(glycerol sebacate)(PGS)bio-spring and electrospun gelatin *** scaffolds seeded with chondrocytes formed tubular mature cartilage-like tissue both via in vitro culture and subcutaneous implantation in the nude mouse,which showed great potential for tracheal cartilage reconstruction.