394 research outputs found
Research on the Overseas Warehouse Construction of Cross-Border E-Commerce
The rapid development of cross-border e-commerce has injected new vitality and productivity to e-commerce. But it also brought the lag problem of cross-border logistics and distribution system. Under current models of logistics and distribution, the order cycle is too long to be efficient which coexist with high cost, uncontrollable risks and complicated procedure. These factors have hindered the development of cross-border e-commerce. In this case, the e-commerce overseas warehousing gradually come into being. How to overcome the contradiction of low-cost and fast delivery, take advantage of overseas warehouse building and successfully open up overseas markets, is an important issue needs to be discussed in the field of cross-border e-commerce. This paper talks from cross-border e-commerce and logistics distribution mode, discusses the rise of overseas warehouse building and analyze their strengths and weaknesses, then give a few suggestions to promote the construction and development of overseas warehouse
Plasma-enabled growth of ultralong straight, helical, and branched silica photonic nanowires
This article reports on the lowerature inductively coupled plasma-enabled synthesis of ultralong (up to several millimeters in length) SiO2 nanowires, which were otherwise impossible to synthesize without the presence of a plasma. Depending on the process conditions, the nanowires feature straight, helical, or branched morphologies. The nanowires are amorphous, with a near-stoichiometric elemental composition ([O] / [Si] =2.09) and are very uniform throughout their length. The role of the ionized gas environment is discussed and the growth mechanism is proposed. These nanowires are particularly promising for nanophotonic applications where long-distance and channelled light transmission and polarization control are required
Hierarchical Prompting Assists Large Language Model on Web Navigation
Large language models (LLMs) struggle on processing complicated observations
in interactive decision making tasks. To alleviate this issue, we propose a
simple hierarchical prompting approach. Diverging from previous prompting
approaches that always put the full observation (e.g. a web page) to the
prompt, we propose to first construct an action-aware observation which is more
condensed and relevant with a dedicated SUMMARIZER prompt. The ACTOR prompt
then predicts the next action based on the summarized observation. While our
method has broad applicability, we particularly demonstrate its efficacy in the
complex domain of web navigation where a full observation often contains
redundant and irrelevant information. Our approach outperforms the previous
state-of-the-art prompting mechanics by 6.2% on task success rate,
demonstrating its potential on interactive decision making tasks with long
observation traces.Comment: EMNLP 2023 Findings; Natural Language Reasoning and Structured
Explanations Workshop at ACL 202
Causal Reasoning of Entities and Events in Procedural Texts
Entities and events are crucial to natural language reasoning and common in
procedural texts. Existing work has focused either exclusively on entity state
tracking (e.g., whether a pan is hot) or on event reasoning (e.g., whether one
would burn themselves by touching the pan), while these two tasks are often
causally related. We propose CREPE, the first benchmark on causal reasoning of
event plausibility and entity states. We show that most language models,
including GPT-3, perform close to chance at .35 F1, lagging far behind human at
.87 F1. We boost model performance to .59 F1 by creatively representing events
as programming languages while prompting language models pretrained on code. By
injecting the causal relations between entities and events as intermediate
reasoning steps in our representation, we further boost the performance to .67
F1. Our findings indicate not only the challenge that CREPE brings for language
models, but also the efficacy of code-like prompting combined with
chain-of-thought prompting for multihop event reasoning.Comment: In Findings of EACL 202
Comparisons of methods for linkage analysis and haplotype reconstruction using extended pedigree data
We compare and contrast the performance of SIMPLE, a Monte Carlo based software, with that of several other methods for linkage and haplotype analyses, focusing on the simulated data from the New York City population. First, a whole-genome scan study based on the microsatellite markers was performed using GENEHUNTER. Because GENEHUNTER had to drop individuals for many of the pedigrees, we performed a follow-up study focusing on several regions of interest using SIMPLE, which can handle all pedigrees in their entirety. Second, 3 haplotyping programs, including that in SIMPLE, were used to reconstruct haplotypic configurations in pedigrees. SIMPLE emerges clearly as a preferred tool, as it can handle large pedigrees and produces haplotypic configurations without double recombinant haplotypes. For this study, we had knowledge of the simulating models at the time we performed the analysis
Hyperoxia disrupts pulmonary epithelial barrier in newborn rats via the deterioration of occludin and ZO-1
Impact of the Hole Transport Layer on the Charge Extraction of Ruddlesden-Popper Perovskite Solar Cells
Recent works demonstrate that polyelectrolytes as a hole transport layer (HTL) offers superior performance in Ruddlesden-Popper perovskite solar cells (RPPSCs) compared to poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). The factors contributing to such improvement need to be systematically investigated. To achieve this, we have systematically investigated how the two HTLs affect the morphology, crystallinity, and orientation of the Ruddlesden-Popper perovskite (RPP) films as well as the charge extraction of the RPPSCs. PEDOT:PSS as a HTL leads to RPP films of low crystallinity and with a number of large pinholes. These factors lead to poor charge carrier extraction and significant charge recombination in the RPPSCs. Conversely, a PCP-Na HTL gives rise to highly crystalline and pinhole-free RPPSC films. Moreover, a PCP-Na HTL provides a better energy alignment at the perovskite/HTL interface because of its higher work function compared to PEDOT:PSS. Consequently, devices using PCP-Na as HTLs are more efficient in extracting charge carriers
Photopolymerized maleilated chitosan/methacrylated silk fibroin micro/nanocomposite hydrogels as potential scaffolds for cartilage tissue engineering
Hydrogels composed of natural materials exhibit great application potential in artificial scaffolds for cartilage repair as they can resemble the extracellular matrices of cartilage tissues comprised of various glycosaminoglycan and collagen. Herein, the natural polymers with vinyl groups, i.e. maleilated chitosan (MCS) and methacrylated silk fibroin (MSF) micro/nanoparticles, were firstly synthesized. The chemical structures of MCS and MSF micro/nanoparticles were investigated using Fourier transform infrared (FTIR) spectroscopy, proton nuclear magnetic resonance (1H NMR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). Then MCS/MSF micro/nanocomposite hydrogels were prepared by the photocrosslinking of MCS and MSF micro/nanoparticles in aqueous solutions in the presence of the photoinitiator Darocur 2959 under UV light irradiation. A series of properties of the MCS/MSF micro/nanocomposite hydrogels including rheological property, equilibrium swelling, sol content, compressive modulus, and morphology were examined. The results showed that these behaviors could be tunable via the control of MSF content. When the MSF content was 0.1%, the hydrogel had the compressive modulus of 0.32±0.07MPa, which was in the range of that of articular cartilage. The in vitro cytotoxic evaluation and cell culture of the micro/nanocomposite hydrogels in combination with mouse articular chondrocytes were also investigated. The results demonstrated that the micro/nanocomposite hydrogels with TGF-β1 was biocompatible to mouse articular chondrocytes and could support cells attachment well, indicating their potential as tissue engineering scaffolds for cartilage repair.This study was supported by National Natural Science Foundation
of China (Grant No. 51203123, 51403165, 51503161) and
the National Key Research and Development Program of China
(No.2016YFA0101102)
WebArena: A Realistic Web Environment for Building Autonomous Agents
With advances in generative AI, there is now potential for autonomous agents
to manage daily tasks via natural language commands. However, current agents
are primarily created and tested in simplified synthetic environments, leading
to a disconnect with real-world scenarios. In this paper, we build an
environment for language-guided agents that is highly realistic and
reproducible. Specifically, we focus on agents that perform tasks on the web,
and create an environment with fully functional websites from four common
domains: e-commerce, social forum discussions, collaborative software
development, and content management. Our environment is enriched with tools
(e.g., a map) and external knowledge bases (e.g., user manuals) to encourage
human-like task-solving. Building upon our environment, we release a set of
benchmark tasks focusing on evaluating the functional correctness of task
completions. The tasks in our benchmark are diverse, long-horizon, and designed
to emulate tasks that humans routinely perform on the internet. We experiment
with several baseline agents, integrating recent techniques such as reasoning
before acting. The results demonstrate that solving complex tasks is
challenging: our best GPT-4-based agent only achieves an end-to-end task
success rate of 14.41%, significantly lower than the human performance of
78.24%. These results highlight the need for further development of robust
agents, that current state-of-the-art large language models are far from
perfect performance in these real-life tasks, and that WebArena can be used to
measure such progress.Comment: Our code, data, environment reproduction resources, and video
demonstrations are publicly available at https://webarena.dev
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