Results 71 to 80 of about 1,217,469 (163)
Trust in the Machine? Practitioner Perspectives on the Role of AI in Online Content Moderation
Policy &Internet, Volume 18, Issue 3, September 2026.ABSTRACT The scale and volume of user‐generated content produced in the Web 2.0 era have led to content moderation becoming an essential aspect of most online platforms' business models. This form of digital labour is often performed by human content moderators (CMs) in the Global South, however, artificial intelligence (AI) technology has increasingly
Elena Martellozzo +4 more
wiley +1 more source
四川大学学报. 自然科学版, 1984 把5/121表成三个单位分数的和,即求方程 5/121=1/x+1/y+1/z的正整数解问题,Blericher得到一组解为(x,y,z)=(25,759,208725)。但是,Bleri-cher不知道三项展开式能否具有一个小于208725的最大分母,这个问题容易解决。看来更有意义的问题是:(1)是否有max(x,y,z)>208725的解。本文得到(1)的全部解共21组,其中max(x,y,z)>208725的解一组。从而解决了以上问题。
刘元章
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Photocatalysis has emerged as a promising approach for solar energy conversion and environmental remediation. However, its practical implementation is still hindered by limited charge‐separation efficiency, slow surface reaction kinetics, and insufficient catalyst stability.
Mengting Zhang +5 more
wiley +1 more source
, 2006 对能够求解一系列线性常微分方程组边值问题的数值计算方法--离散正交法(DOM)进行了离散点的正交分析,给出了计算机实现数值计算的程序设计原理与计算流程图,指出了该方法能够克服传统计算方法由于所求函数的快速增长所引起的边界效应和局部效应的缺点,给出了得到稳定计算过程的可能性.为了推广应用,文中介绍了离散正交法的基本原理、实现方法和求解过程,讨论了采用离散正交法来求解非线性问题的处理方法.并且以承受均布载荷的环形板为例 ...
白象忠, 田振国
core +2 more sources
具有时滞的周期Lotka-Volterra系统的持久性与渐进稳定性(英文)
四川大学学报. 自然科学版, 2004 研究了具有反馈的Lotka Volterra方程,给出了其正解具有持久性的充分条件.并利用Horn不动点定理,得到其正周期解的存在性.
曾永福, 徐道义
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Aiming at the problems of insufficient forming quality and poor surface performance in the preparation of Ti‐6Al‐4V alloy by laser powder bed fusion (LPBF), this study proposed a laser in situ forging additive manufacturing (LIF‐AM) technology, which integrates LPBF with femtosecond laser in situ shock forging and realizes defect control and ...
Peng He +10 more
wiley +1 more source
, 2013 环己烷液相氧化制备环己醇与环己酮（K/A 油）是重要的石油化工过程。其中，环己基过氧化氢（CHHP）是环己烷氧化的重要中间体，CHHP分解是环己烷氧化的关键步骤之一。目前工业分解CHHP的方法为碱分解法，该方法K/A油的总选择性较低，而且反应过程中消耗大量NaOH，产生的废碱渣对环境污染严重。如何实现无碱高效分解CHHP，对节约资源，降低生产成本，实现清洁生产和环境保护，具有重要的科学意义和应用价值。 论文首次对氮正离子-过渡金属均相催化CHHP分解的性能进行研究 ...
郑玺
core
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Achieving rapid and selective separation of anode and cathode materials remains a critical challenge in the recycling of spent lithium‐ion batteries. This study develops a microwave‐enhanced flotation strategy for the efficient recovery of cathode and anode materials.
Peiyuan Ye +5 more
wiley +1 more source
关于丢番都方程（a2-b2）x+（2ab）v=（a2+b2）2
四川大学学报. 自然科学版, 1959 除x=y=z=2外,有无其他正整数解。Jesmanowicz的猜测是没有其他正整数解。并且证明了对于b,a=2,3;3,4;4,5;5,6,他的猜测是成立的。作者曾对a=n+1,b=n,其中n为自然数时得出了一些结果 ...
柯召
doaj
Uncovering Cu Involved Nanophase Structures and Transformation in a Novel 7075B Aluminum Alloy
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT In this study, aberration‐corrected transmission electron microscopy combined with first‐principles calculations was employed to systematically investigate the Cu‐involved crystal structures and evolution mechanisms of nanoprecipitates in a novel 7075B Al alloy. Firstly, an atomic model of the early‐stage GP‐ηp structure together with specific
Deyu Zhang +13 more
wiley +1 more source