Wide

摘要： 惠普于2015年进入中国市场的大幅面打印机HP PageWide XL,日前在全国装机达到2000台,打印图纸达到6亿m^(2),2020年市场占有率为70%。惠普称根据数据,市场每3张图纸就有一张是通过HP PageWide XL打印的。

摘要： One of today’s actual problems in the field of antennas is the possibility of developing a small wideband antenna,which can work without grounding.Absence of these antennas can lead to serious problems for example in case of designing small transceivers for cellular systems.In this article we show a proposed version of these antennas.Today there do not exist theoretical investigations of connections between electromagnetic fields and currents in flat metallic plates.Therefore,the basis of this work is optimization of proposed antenna construction by simulations.

摘要： 在2019年摩纳哥游艇展期间的新闻发布会上,意大利Wider正式宣布启动最新的在建游艇项目:55米超级游艇Wider 180,这也是继今年7月船厂所有权变更之后,新核心团队首次公开亮相。

摘要： Full-azimuth common reflection-angle gathers could be stacked at any azimuth. The stacked data at the azimuth perpendicular to fractures exhibit the largest azimuthal anisotropy, while the stacked data at the azimuth parallel to fractures exhibit the smallest azimuthal anisotropy. In petroleum exploration in Block A, a neritic province in the Bohai Bay, we use the stacked data at the azimuth perpendicular to fractures to improve fault interpretation. We also use attribute fusion to identify fractures in different directions.

摘要： Beta-phase gallium oxide(β-Ga_2O_3) Schottky barrier diodes were fabricated on highly doped single-crystal substrates,where their temperature-dependent electrical properties were comprehensively investigated by forward and reverse current density – voltage and capacitance – voltage characterization. Both the Schottky barrier height and the ideality factor showed a temperature-dependence behavior, revealing the inhomogeneous nature of the Schottky barrier interface caused by the interfacial defects. With a voltage-dependent Schottky barrier incorporated into thermionic emission theory, the inhomogeneous barrier model can be further examined. Furthermore, the reverse leakage current was found to be dominated by the bulk leakage currents due to the good material and surface quality. Leakage current per distance was also obtained. These results can serve as important references for designing efficient β-Ga_2O_3 electronic and optoelectronic devices on highly doped substrates or epitaxial layers.

摘要： This article is an attempt to answer student’s (and not only students’) questions about the possibility of inventions nowadays in the field of electricity. The student is confident that nowadays everything is clear. Large firms do everything which is needed. And the time for inventions is over. But in fact, many things are not so clear, and a new Tesla may appear.

摘要： 世界自然基金会（World Wide Fund for Nature,WWF）的一份最新报告显示,地中海的微塑料污染水平创新高,威胁着海洋物种和人类的健康。结合世界海洋日,WWF发表报告《塑料陷阱：拯救塑料污染中的地中海》。

摘要： 在现代企业生产经营活动中，互联网已经成为一种不可或缺的基础设施。各分支机构之间通常使用WAN的方式进行互联。WAN，Wide Area Network，即广域网，通常是指分布在不同地理位置，连接多个LAN的私有通信网络。

摘要： There is a long and wide continuous trough of deep mixed layers connecting the tropical western North Pacific Ocean with the offshore waters of the coast of California. Relatively warm water that is nearly uniform vertically fills the trough, which is concluded here to be a northeastward flow joining the wide warm surface current at mid-latitudes off California documented earlier. Evi-dence for the trough comes from a North Pacific atlas based on very many indi-vidual mixed layer depth data points, taken over a 27-year period, compiled (av-eraged) in monthly mean charts with contours of constant mixed layer depth dis-played. BTs (bathythermographs) were used to record temperature versus depth continuously from which the mixed layer depths were determined. Centerline curves, connecting the deepest mixed layer depths, which approximate the mid-dle of the troughs, are constructed from the atlas and are presented for all twelve months. In going from west to east, these curves bend counterclockwise, gradu-ally most of the way then more markedly near California. The curves for the summer months come closer to California than any of the other ones do, suggest-ing that the warm current itself is nearest to California in summer. Confirmation of the prediction awaits future efforts.

摘要： A multiuser Ultra Wide Band (UWB) channel suffers seriously from realistic impairments. Among this, multipath fading and interferences, such as Multiple Access Interference (MAI) and Inter Symbol Interference (ISI), that significantly degrade the system performance. In this paper, a polar coding technique, originally developed by Arikan, is suggested to enhance the BER performance of indoor UWB based Orthogonal Frequency Division Multiplexing (OFDM) communications. Moreover, Interleave Division Multiple Access (IDMA) scheme has been considered for multiuser detection depending on the turbo type Chip-By-Chip (CBC) iterative detection strategy. Three different models as Symmetric Alpha Stable (SαS), Laplace model and Gaussian Mixture Model (GMM), have been introduced for approximating the interferences which are more realistic for UWB system. The performance of the proposed Polar-coded IDMA OFDM-based UWB system is investigated under UWB channel models proposed by IEEE 802.15.3a working group and compared with Low Density Parity Check (LDPC)-coded IDMA OFDM-based UWB system in terms of BER performance and complexity under the studied noise models. Simulation results show that the complexity of the proposed polar-coded system is much lower than LDPC-coded system with minor performance degradation. Furthermore, the proposed polar-coded system is robust against noise and interferences in UWB indoor environment and gains a significant performance improvement by about 5 dB compared with un-coded IDMA-OFDM-UWB system under the studied noise models.

摘要： 本发明提供一种基于Wide&Deep模型和遗传算法的无人货架选址方法，涉及机器学习和商业选址领域。本发明提出一种基于Wide&Deep模型和遗传算法的无人货架选址规划方法，从现有的货架销售数据中提取特征，结合地理因素，基于Wide&Deep模型预测新地址的盈利效率，结合配送成本和覆盖面等因素，通过遗传算法和线性加权评分计算出在一个备选地址投放货架的综合推荐度，从而得到一组特定数量的精确投放点位，可以有效地提供选址参考，解决货损率高、盈利难等问题。

摘要： 本发明公开了一种高效的Wide&Deep深度学习模型。本发明旨在解决深度学习模型中对人工特征的充分利用以及Wide&Deep模型预测时的计算消耗问题。本发明的实施方案是：首先对文本数据进行标注，其次构建Wide特征，然后对基于Wide&Deep的深度学习模型添加辅助训练任务，最后对文本内容进行预测。本发明提及的人工特征作为深度学习模型训练过程中的附加任务，为模型提供了更多的有效信息，提高了模型学习效率。并且，在文本内容预测时不需要计算Wide特征，从而提升了模型性能。不同宽度的卷积核卷积后，可以通过一次卷积block获得不同距离上的信息，这有助于提升模型性能。同时，减少调整不同卷积核的时间，通过模型学习能自动适应不同的卷积核宽度。

摘要： 本发明公开了一种基于wide and deep网络的FAQ匹配方法、装置、设备及存储介质，方法包括：分别获取目标问题及候选问题的文本表征，并分别将目标问题以及候选问题的文本表征映射成目标问题的第一映射向量以及候选问题的第二映射向量；计算第一映射向量以及第二映射向量的第一相似度以及计算目标问题及候选问题的句子长度差异的第二相似度、相同词比例的第三相似度、相同词逆序数比例的第四相似度；根据第一相似度、第二相似度、第三相似度及第四相似度，获得文本相似度，并根据文本相似度进行FAQ匹配。本发明通过提取目标问题和候选问题的上下文信息、句子长度差异、相同词数量以及相同词顺序等特征，得到一个更加全面的相似度进行FAQ匹配。

摘要： 本发明涉及一种差分UWB(ultra‑wide band)定位方法。该方法将卫星定位中普遍使用的差分思想引入UWB定位算法中，通过定位结果或原始观测值间做差的方式，来消除公共系统误差对定位精度的影响。差分定位可分为位置域差分和观测值域差分。其中，位置域差分不要求两标签观测相同基站，原理更为简单，但精度较低；观测值域差分更加准确，但要求两标签有一定数量的相同观测基站。本发明结合两种差分方法，提出了一种基于位置差分和观测值差分的UWB定位方法。与传统方法相比，通过引入基准标签进行差分，有效减弱了系统误差对定位精度的影响，提高了UWB的定位精度。同时，使UWB基站的使用数量减少，降低了UWB定位系统的建设成本。

摘要： 本发明公开了一种基于wide and deep网络的FAQ匹配方法、装置、设备及存储介质，方法包括：分别获取目标问题及候选问题的文本表征，并分别将目标问题以及候选问题的文本表征映射成目标问题的第一映射向量以及候选问题的第二映射向量；计算第一映射向量以及第二映射向量的第一相似度以及计算目标问题及候选问题的句子长度差异的第二相似度、相同词比例的第三相似度、相同词逆序数比例的第四相似度；根据第一相似度、第二相似度、第三相似度及第四相似度，获得文本相似度，并根据文本相似度进行FAQ匹配。本发明通过提取目标问题和候选问题的上下文信息、句子长度差异、相同词数量以及相同词顺序等特征，得到一个更加全面的相似度进行FAQ匹配。