制作认真、性能优越的小钢炮 DALI FAZON SAT、FAZON SUB1

说到丹麦人的音箱,或许是因为这个国家的人的思想比较超前的关系吧,丹麦人所设计出来的音箱给我的印象是精致、时尚、简洁、大方且皮实,既美观又耐用,而且声音风格也极具个性,不论从视觉还是听觉上都能满足消费者的需要。最近,我在逛商场的时候看到了DALI新推出的一套针对小房间而设计的FAZON/MOTIF系列卫星音箱,整个系列包含了FAZON SAT音箱、FAZON SUB1超低音音音箱和MOTIF LCR主音箱。虽然它们的体积并不大,但从工艺、造型等方面完全与我上文所说的一样,工艺精细、色调和谐且兼顾扎实,是一件非常生活化的产品,特别适合搭配平板电视在卧室、偏厅、书房等小空间中组建影院或音乐播放系统。万万都没有想到的是,当我看到不久后,一套全新的FAZON SAT和FAZON SUB15.1声道系统就送到编辑部中作为测评之用了。     

从P＆E 2010看影像产品的技术和市场发展

或许有些读者看完本文会感到十分疑惑。身为影音媒体的我们居然跑去报道摄影器材资讯了？其实,虽然我们并不是以摄影作为主题的媒体,但从我们调查中发现,绝大部分影音发烧友都十分热衷于摄影。同时,身为媒体的我们在工作的时候都需冀进行产品拍摄。又或者拍摄备类型的会议和活动实况。     

Property law as a barrier to energy upgrades in multi<Emphasis>-</Emphasis>owned properties<Emphasis>:</Emphasis> insights from a study of England and Scotland

Is the law of ownership a barrier to energy upgrades in apartment blocks? Co-owners in multi-owned properties face challenges in reaching agreement to implement energy efficiency measures that owners of single family residences do not encounter. At the European level, this difficulty is recognised in Article 19 of the 2012 Energy Efficiency Directive, by which governments are obliged to address barriers to improvements which arise in the specific context of multi-owner properties. Despite this, the position of apartment owners remains mostly invisible in the policy discourse. The small quantity of literature examining the difficulties of group decision making around energy efficiency in apartments has so far focused on mapping the issues. This paper begins the process of ‘colouring in’ the existing outlines by providing an in-depth delineation of the governance barriers to energy upgrades presented by the law of ownership and management in two European jurisdictions: England and Scotland. A doctrinal analysis is employed to ascertain the relevant legal issues and identify how property law constitutes a barrier to energy upgrades within the framework of existing behavioural models. A theoretical inquiry is then used to suggest that reconceptualising property law in the context of multi-owner properties to focus on collective responsibilities rather than individual rights may help to minimise this effect of the law. The paper concludes with recommendations for further research to identify the range of issues property law presents across EU member states. This data is needed to fully test the reconceptualisation hypothesis presented here.     

Lagrange programming neural networks for time-of-arrival-based source localization

Finding the location of a mobile source from a number of separated sensors is an important problem in global positioning systems and wireless sensor networks. This problem can be achieved by making use of the time-of-arrival (TOA) measurements. However, solving this problem is not a trivial task because the TOA measurements have nonlinear relationships with the source location. This paper adopts an analog neural network technique, namely Lagrange programming neural network, to locate a mobile source. We also investigate the stability of the proposed neural model. Simulation results demonstrate that the mean-square error performance of our devised location estimator approaches the Cramér–Rao lower bound in the presence of uncorrelated Gaussian measurement noise.     

将随机HDMI信号线拿去填海吧!-AudioQuest(线圣)HDMI-3信号线体验

美国AudioQuest(线圣)这个品牌笔者相信有很多的发烧友都认识,其品牌的产品以高性价比的特色在音响线材领域占据了很大的市场,广为发烧友推崇。在该公司20多年的发展中,对导线的设计以及生产等方面不断地精益求精,以减少失真和零损耗的设计理念制作出一系列高素质的发烧线材。最近更在视频发展浪潮的推动下,利用自己多年制造线材的经验与技术顺势推出了多款HDMI视频线,包括HDMI-X、HDMI-1、HDMI-2以及HDMI-3。其中CinemaQuest HDMI-3视频线面世已有一定时日,在市场     

Mandibular glands of maleCentris adani, (Hymenoptera: Anthophoridae)

Males of the solitary Central American beeCentris adani Cockerell possess enlarged mandibular glands filled with a fragrant fluid that was shown by gas chromatographic and mass spectral analysis to consist of nerol, geraniol, neral, ethyl laurate, and geranyl acetate. Male bees set up territories by marking a semicircular array of grass stems with these compounds. Grass stems marked by the bees showed the presence of the same chemicals.Approved as TA 16466 by the Director, Texas Agricultural Experiment Station. All programs and information of the Texas Agricultural Experiment Station are available without regard to race, ethnic origin, religion, sex or age. Supported in part by NSF grant DEB 7063936 and the National Geographic Society.     

Microbial Resistance Mechanisms to the Antibiotic and Phytotoxin Fusaric Acid

Fusaric acid (FA) produced by Fusarium oxysporum plays an important role in disease development in plants, including cotton. This non-specific toxin also has antibiotic effects on microorganisms. Thus, one expects a potential pool of diverse detoxification mechanisms of FA in nature. Bacteria and fungi from soils infested with Fusarium and from laboratory sources were evaluated for their ability to grow in the presence of FA and to alter the structure of FA into less toxic compounds. None of the bacterial strains were able to chemically modify FA. Highly FA-resistant strains were found only in Gram-negative bacteria, mainly in the genus of Pseudomonas. The FA resistance of the Gram-negative bacteria was positively correlated with the number of predicted genes for FA efflux pumps present in the genome. Phylogenetic analysis of predicted FA resistance proteins (FUSC, an inner membrane transporter component of the efflux pump) revealed that FUSC proteins having high sequence identities with the functionally characterized FA resistance protein FusC or Fdt might be the major contributors of FA resistance. In contrast, most fungi converted FA to less toxic compounds regardless of the level of FA resistance they exhibited. Five derivatives were detected, and the detoxification of FA involved either oxidative reactions on the butyl side chain or reductive reactions on the carboxylic acid group. The production of these metabolites from widely different phyla indicates that resistance to FA by altering its structure is highly conserved. A few FA resistant saprophytic or biocontrol strains of fungi were incapable of altering FA, indicating a possible involvement of efflux transporters. Deployment of both efflux and derivatization mechanisms may be a common feature of fungal FA resistance.     

Efficient frequency estimation of a single real tone based on principal singular value decomposition

The problem of single-tone frequency estimation for a discrete-time real sinusoid in white Gaussian noise is addressed. We first show that the frequency information is embedded in the principal singular vectors of a matrix which stores the observed data with no repeated entry. The technique of weighted least squares is then utilized for finding the frequency from the singular vectors. It is proved that the variance of the frequency estimate approaches Cramér–Rao lower bound when the data observation length tends to infinity. The computational efficiency and estimation accuracy are demonstrated via computer simulations.     

无彩数码提花织物的创新设计原理和方法

根据数码设计原理,数码提花织物的创新设计研究按设计方法可分为无彩和有彩两种类型。对无彩数码提花织物的创新设计原理和方法进行深入分析,提出无彩灰度的计算机色彩设计原理以及对应的数码全息组织库的建立方法。以单层结构提花织物为基础,在设计方法上将织物结构设计与织物色彩设计有效分离,在CAD系统中根据不同亮度值将数码图像灰度与组织库中的组织进行配对替换,实现织物结构的自动设计,该设计原理和方法满足无彩提花织物人工智能设计的技术要求,同时也是彩色提花织物组织自动生成原理和方法的基础。     

仿真数码提花织物的设计原理和方法

针对提花织物对数码图像的色彩与图案的仿真设计技术展开分析,提出一种创新的仿真数码提花织物的设计原理和设计方法。采用全显色组合结构设计方法设计织物结构,通过2次CMYK分色补偿提花织物灰度表现的不足,并提出可调节的纱线色彩选择方法,使设计的提花织物能对数码图像的色彩与图案进行仿真。该方法可满足数码图案设计仿真织物的需要,所设计的织物具有良好的交织平衡技术特征,能满足大批量生产的技术要求。