Jiajun He

ORCID: 0009-0003-8236-8422
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About
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Research Areas
  • Catalytic C–H Functionalization Methods
  • Radical Photochemical Reactions
  • Remote Sensing and Land Use
  • Micro and Nano Robotics
  • Environmental Impact and Sustainability
  • Oxidative Organic Chemistry Reactions
  • Advanced Materials and Mechanics
  • Climate variability and models
  • Energy, Environment, Economic Growth
  • Advanced Sensor and Energy Harvesting Materials
  • Cryospheric studies and observations
  • Network Security and Intrusion Detection
  • Urban Heat Island Mitigation
  • Environmental Changes in China
  • Software-Defined Networks and 5G
  • Healthcare and Environmental Waste Management
  • Evolutionary Algorithms and Applications
  • Infection Control and Ventilation
  • Thermal Regulation in Medicine
  • Non-Invasive Vital Sign Monitoring
  • Characterization and Applications of Magnetic Nanoparticles
  • Climate Change Policy and Economics
  • Thermal Radiation and Cooling Technologies
  • Magnetic Properties and Applications
  • Regional Development and Environment

Shenzhen University
2023-2025

China University of Geosciences
2023-2025

University of California, San Diego
2023-2024

Wuhan Institute of Technology
2021-2024

Southeast University
2023-2024

Central University of Finance and Economics
2023

Guangdong University of Technology
2023

Sun Yat-sen University
2023

Untethered miniature robots enable targeted delivery and therapy deep inside the gastrointestinal (GI) tract in a minimally invasive manner. By combining actuation systems imaging tools, significant progress has been made toward development of functional microrobots. However, vision-based control microrobots GI tract—with lots biological barriers, intestinal peristalsis, highly viscous mucus—remains challenging. To enhance obstacle-crossing ability long-lifespan tracking, we report...

10.1016/j.device.2023.100181 article EN cc-by-nc-nd Device 2023-12-12

The construction and analysis of daily temperature data series in long enough a time period is important to understand decadal multi-decadal variability changing trends extreme events. This paper reports new indices over the last 140 yr Wuhan, China, with an emphasis on changes high changes. from 9 stations 1881 1950 1 modern station 1951 2020 were used for analysis. Based data, commonly indices, variations long-term events Wuhan since analyzed. results show that there was no clear warming...

10.5194/egusphere-egu25-456 preprint EN 2025-03-14

Herein, we demonstrate 1) that Lewis base heteroatom coordination to diaryliodonium salts is not required for light-driven radical generation and 2) radicals generated by this route can be captured transition-metals coupling reactions. These results are the first step toward developing new aryl reactions without exogenous photocatalysts.

10.26434/chemrxiv-2023-kjgxz-v3 preprint EN cc-by-nc-nd 2024-03-20

We demonstrate 1) that halogen bonding is not critical for enabling light-driven radical generation from diaryliodonium salts and 2) radi-cals generated by this route can be captured transition-metals C–H arylation reactions. These results are the first step toward devel-oping new metal-catalyzed aryl couplings without exogenous photocatalysts.

10.26434/chemrxiv-2023-kjgxz-v4 preprint EN cc-by-nc-nd 2024-05-15

We demonstrate (1) detectable halogen bonding is not critical for enabling light-driven radical generation from diaryliodonium salts and (2) radicals generated by this route can be captured transition-metals C-H arylation reactions. These results are the first step toward developing new metal-catalyzed aryl couplings without exogenous photocatalysts.

10.1039/d4cc01259c article EN Chemical Communications 2024-01-01

The construction and analysis of daily temperature data series in long enough a time period is important to understand decadal multi-decadal variability changing trends extreme events. This paper reports new indices over the last 140 yr Wuhan, China, with an emphasis on changes high changes. from 9 stations 1881 1950 1 modern station 1951 2020 were used for analysis. Based data, commonly indices, variations long-term events Wuhan since analyzed. results show that there was no clear warming...

10.3354/cr01730 article EN cc-by Climate Research 2023-10-24

Diaryliodonium salts are bench stable aryl radical precursors. While photocatalysts generally responsible for generation, recent reports have emerged exhibiting photocatalyst-free generation using select Lewis bases as activators. Herein, we demonstrate 1) the ability of numerous to enable light-driven and 2) these radicals can be captured by transition-metals coupling reactions. These results first step toward developing new organometallic reactions without photocatalysts.

10.26434/chemrxiv-2023-kjgxz preprint EN cc-by-nc-nd 2023-11-21

Under the background of “dual carbon,” power industry, as a pillar industry national economy, is ushering in changes. Based on data listed companies electric production and supply from 2010 to 2020, this paper takes operating income corresponding each unit carbon emission substitute variable performance (CP). After dimensionality reduction 12 financial indicators through factor analysis, establishes comprehensive indicator (FP), panel explore relationship between CP FP enterprises. To...

10.3389/fenvs.2024.1362450 article EN cc-by Frontiers in Environmental Science 2024-04-12

We present Hunyuan-DiT, a text-to-image diffusion transformer with fine-grained understanding of both English and Chinese. To construct we carefully design the structure, text encoder, positional encoding. also build from scratch whole data pipeline to update evaluate for iterative model optimization. For language understanding, train Multimodal Large Language Model refine captions images. Finally, Hunyuan-DiT can perform multi-turn multimodal dialogue users, generating refining images...

10.48550/arxiv.2405.08748 preprint EN arXiv (Cornell University) 2024-05-14

This article has been removed: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).Further to an investigation the 2011 International Conference Energy Systems and Electric Power (ESEP 2011), Procedia, Volume 13 removed by publisher due insufficient assurances programme organisers that professional ethical codes of publishing standards were applied consistently. For author enquiries contact: [email protected].

10.1016/j.egypro.2011.12.702 article EN Energy Procedia 2011-01-01

Face masks with multiple functionalities and exceptional durability have attracted increasing interests during the pandemic of Covid-19. How to integrate antibacterial property, comfortability long-time wearing, breath monitoring capability together on a face mask is still challenging. Here we developed kind that assembles particles-free superhydrophobic fabric, hidden device together, resulting in highly breathable, superhydrophobic, capability. From rational design functional layers, shows...

10.2139/ssrn.4358228 article EN 2023-01-01

This report aims to connect decarbonization solutions with necessary finance required accelerate the net-zero transition in GBA. It firstly applied a top-down approach predict macro pathways for whole GBA, then bottom-up analyse specific and key energy consuming sectors--manufacturing industries, road transport, buildings, highlight actions most needed achieve 30-60 goal, more ambitious goals peak emissions carbon neutrality earlier. Based on above pathways, this estimated how much...

10.46830/wrirpt.22.00049 article EN 2023-04-01

Cyber mimic defense is designed to ensure endogenous security, effectively countering unknown vulnerabilities and backdoors, thereby addressing a significant challenge in cyberspace. However, the immense scale of real-world networks their intricate topology pose challenges for measuring efficacy cyber defense. To capture quantify performance within specific segments these expansive networks, we embrace partitioning approach that subdivides large into smaller regions. Metrics are then...

10.3390/app13169213 article EN cc-by Applied Sciences 2023-08-13

While photocatalysts are generally responsible for radical generation from bench stable diaryliodonium salts, recent reports have emerged exhibiting photocatalyst-free using select Lewis bases as activators. Herein, we demonstrate 1) the ability of numerous to enable light-driven and 2) these radicals can be captured by transition-metals coupling reactions. These results first step toward developing new organometallic aryl reactions without photocatalysts.

10.26434/chemrxiv-2023-kjgxz-v2 preprint EN cc-by-nc-nd 2023-11-22

The current security problems in cyberspace are characterized by strong and complex threats. Defenders face numerous such as lack of prior knowledge, various threats, unknown vulnerabilities, which urgently need new fundamental theories to support. To address these issues, this article proposes a generic theoretical model for defense mimic framework, that is, Spatiotemporally heterogeneous, Input aware, Dynamically updated Mimic Defense (SIDMD). We make the following contributions: (1) first...

10.48550/arxiv.2208.10276 preprint EN other-oa arXiv (Cornell University) 2022-01-01

Abstract Background: Medical wastewater from hospitals specializing in infectious diseases is a major health and environmental risk during pandemics. However, few systematic studies on medical management of have been reported. As designated emergency field hospital for the treatment COVID-19, Huoshenshan Hospital achieved successful outcomes measures wastewater. Results: The lessons wastwater based can be concluded following four aspects: (1) Emergency system “Internet Plus” technology,...

10.21203/rs.3.rs-824051/v1 preprint EN cc-by Research Square (Research Square) 2021-09-17
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