As rising star materials, single-atom and dualatom catalysts have been widely reported in the electrocatalysis area. To answer the key question: single-atom and dual-atom catalysts, which is better for electrocatalytic urea synthesis? we design two types of catalysts via a vacancy-anchorage strategy: single-atom Pd 1 À TiO 2 and dual-atom Pd 1 Cu 1 À TiO 2 nanosheets. An ultrahigh urea activity of 166.67 mol urea mol Pd À 1 h 1 with the corresponding 22.54 % Faradaic efficiency at À 0.5 V vs. reversible hydrogen electrode (RHE) is achieved over Pd 1 Cu 1 À TiO 2 , which is much higher than that of Pd 1 À TiO 2 . Various characterization including an in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and theoretical calculations demonstrate that dual-atom Pd 1 Cu 1 site in Pd 1 Cu 1 À TiO 2 is more favorable for producing urea, which experiences a CÀ N coupling pathway with a lower energy barrier compared with Pd

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The paper aims to assess bus accessibility considering the matching between supply and demand for effectively optimizing the level and fairness of urban public transport service, which realizes the quantification of regional balance and accurate positioning the area with the worst balance. We firstly employ hotspot detection procedure based on taxi trajectory data and kernel density analysis to identify the travel sensitive areas, the heat values of which are deployed to represent travel demand spatial-temporally and evaluate weight factors for bus accessibility modeling. Matter-element theory is selected to establish multi-parameter evaluation model of bus accessibility, which has potential for solving incompatibility problems by systematically considering all factors. The correlations between accessibility indexes and heat value are deployed to evaluate weight factors rather than analytic hierarchy process or expert assessment method to improve subjectivity and dynamic updating. An index called the Level Ratio of Accessibility to Demand (LRAD) is addressed finally to quantify the balance between accessibility supply and travel demand of travel sensitive areas, which identifies the regional imbalance to assist the public transport system assignment. Xi'an, a large city, is selected as a case study for methodology verification. Bus accessibility degree of the whole city as well as its travel sensitive areas is evaluated by the matter-element model. It is found the bus transport accessibility of Xi'an is moderate level(M 3). The LRAD results identify the priority-processing area with the poor balance between accessibility supply and travel demand, which is cross referenced with local urban plans for verification.

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The underwater glider has difficulty accessing the complex and narrow hadal trench for observation, which is affected by its limited regulation capability of pitch angle (−45°~45°). In this study, a compact attitude regulating mechanism is proposed to extend the regulation range of pitch angle from −90°to 90° and to install it on the hadal-class underwater glider Petrel-XPLUS. Subsequently, the dynamics model of Petrel-XPLUS is established using dual quaternions to solve the “gimbal lock” problem caused by the increased pitch angle range. Within the extended pitch range, the motion modes of the glider are enriched into long-range, virtual mooring, and Lagrangian float modes for long-range, small-area, and current-following observation missions, respectively, and are analyzed using the established dynamics model. Moreover, a ballast method was used to modify the pitch angle range and initial equilibrium state of a constructed underwater glider. Finally, Petrel-XPLUS achieved a pitch angle regulation range of −90°~90° in a water pool experiment and completed three consecutive profiles in a sea trial in the Challenger Deep, Mariana Trench, with all depths over 10,000 m, of which the maximum depth was 10,619 m. The proposed mechanism and methods can also be applied to other submersibles to facilitate ocean observations.

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As rising star materials, single-atom and dualatom catalysts have been widely reported in the electrocatalysis area. To answer the key question: single-atom and dual-atom catalysts, which is better for electrocatalytic urea synthesis? we design two types of catalysts via a vacancy-anchorage strategy: single-atom Pd 1 À TiO 2 and dual-atom Pd 1 Cu 1 À TiO 2 nanosheets. An ultrahigh urea activity of 166.67 mol urea mol Pd À 1 h 1 with the corresponding 22.54 % Faradaic efficiency at À 0.5 V vs. reversible hydrogen electrode (RHE) is achieved over Pd 1 Cu 1 À TiO 2 , which is much higher than that of Pd 1 À TiO 2 . Various characterization including an in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and theoretical calculations demonstrate that dual-atom Pd 1 Cu 1 site in Pd 1 Cu 1 À TiO 2 is more favorable for producing urea, which experiences a CÀ N coupling pathway with a lower energy barrier compared with Pd

Absfrnct-The paper introduces the (unction of the PXIbus multi-function N U module and the module's characteristics firstly, and then it specifics the key hardware design. On the basis of the introduction, the paper gives the presentatioo on how to realize the Eorhvare layout.