Superscattering of water wavesOA

Inspired by the concept of superscattering in optics,we for the first time theoretically predict and experimentally demonstrate the superscattering phenomenon in water waves.The subwavelength superscatterer is constructed by multi-layered concentric cylinders with an inhomogeneous depth profile.The superscatterer breaks the long-held single-channel scattering limit by several times and thus significantly enhances the total scattering strength.The underlying mechanism originates from the near deg...     

Strong coupling without touching

<正>If an excited atom is put in between highrelectance mirrors,the light emited by the atom can be bounced back and be re-absorbed and be re-emited,again and again until the light leaks out of the mirrors or is re-emited into a wrong direction.his coherent oscillation between atom and light,called vacuum Rabi oscillation,results from interference between     

A universal route to efficient non-linear response via Thomson scattering in linear solidsOA

Non-linear materials are cornerstones of modern optics and electronics.Strong dependence on the intrinsic properties of particular materials,however,inhibits the at-will extension of demanding non-linear effects,especially those second-order ones,to widely adopted centrosymmetric materials(for example,silicon) and te chnologically important burgeoning spectral domains(for example,terahertz frequencies).Here we introduce a universal route to efficient non-linear responses enabled by exciting non-...     

Investment in the Future:Training of Young Researchers in Times of Globalization

In light of research policy development and the global efforts we are seeing to strengthen universities, and in light of the Increasing need for junior scientists, nonuniversity research facilities, too, are facing new challenges.     

Investment in the Future:Training of Young Researchers in Times of Globalization

In light of research policy development and the global efforts we are seeing to strengthen universities, and in light of the increasing need for junior scientists, non-university research facilities, too, are facing new challenges.     

网络隐私保护策略分析

In the light of the present status of network privacy violations, this paper analyzes the network privacy protection strategies in USA and Europe, and puts forward some strategies that may be adopted in China.     

New Applications for a Well-known Phenomenon

The Talbot effect, the self-imaging of a grating when it is illuminated by a monochromatic plane wave, was first discovered by the English scientist Henry Fox Talbot more than a century ago.It is generally described in university textbooks as an example of Fresnel diffraction and is considered one of the fundamental phenomena in optics.     

Evolution of artificial ion channelsOA

<正>Protein ion channels on a cell membrane generate action potentials for cellular signal transduction, and regulate biological activities during life. Since the discovery of the asymmetric ion transport phenomenon in quartz nanopipettes by Bard and colleagues [1], synthetic nanofluidic materials and devices have attracted a lot of research interests from the scientific community,     

《最高人民法院關於知識産權民事訴訟證據的若干規定》

(Adopted at the 1815"Session of the Judicial Committee of the Supreme People's Court on 9 November 2020,and coming into force on 18 November 2020)For the purposes of guaranteeing and facilitating a party's exercise of litigation rights according to law,and ensuring the fair and timely trial of IP-related civil cases in the people’s courts,the Provisions are formulated in accordance with the Civil Procedure Law of the People's Republic of China and other relevant legal provisions and in light of the IP-related civil trial practices.     

Robotic mobile and mirror milling of large-scale complex structuresOA

<正>Large-scale complex structures,such as spacecraft cabins,aircraft composite skins and launch vehicle fuel tanks,are the core components of the equipment in aerospace,energy,shipbuilding and other fields.Their milling quality and efficiency are factors directly affecting the performance and productivity of spacecraft,aircraft and other key equipment.This kind of structure generally features large dimension,high accuracy,     

Late Ordovician Mass Extinction: Earth,fire and iceOA

The Late Ordovician Mass Extinction was the earliest of the ‘big’ five extinction events and the earliest to affect the trajectory of metazoan life. Two phases have been identified near the start of the Hirnantian period and in the middle. It was a massive taxonomic extinction, a weak phylogenetic extinction and a relatively benign ecological extinction. A rapid cooling, triggering a major ice age that reduced the temperature of surface waters, prompted a drop in sea level of some 100 m and intr...     

Climbing robots for manufacturingOA

Robotized intelligent manufacturing is a growing trend in the manufacturing of large and complex components in aviation,aerospace,marine engineering and other industries.With their expansive workspaces and flexible deployment,climbing manufacturing robots can create a revolutionary manufacturing paradigm for large and complex components.This paper defines the climbing manufacturing robot based on the application status of climbing robots and then analyzes four key technical re quirements:adhesio...     

High Order Multiphoton Upconversion Processes and Intense Ultraviolet Upconversion Luminescence under NIR Excitation

Since the advent of lasers, high order multiphoton upconversion processes （HOMUPs） have been widely investigated throughout the scientific communityowing to their great fundamental significance and numerous applications in short wavelength light generation, optical imaging, and spectroscopy. Especially, upconversion pumping by means of intrinsic energy level matching of certain rare-earth （RE） ions plays a significant role in achieving short-wavelength light, due to ample availability of high power semiconductor diode lasers in the near-infrared （NIR） range. In the past decades, many efforts have been devotedto getting breakthroughs in HOMUPs,     

In pursuit of reconstructing missing human handsOA

<正>Human beings are the most intelligent living beings on Earth.Creating reconstructions of missing human limbs that can be naturally integrated into the human body is a lofty ambition and faces challenges in neuroscience,information science,mechanical and electronic engineering,and many other disciplines.Based on the development history of robotic prosthetic hands over the past 70 years,     

Exploratory Round Table Conferences： in Search of Emerging New Sciences

<正>Science,the never-ending frontier,is a major driving force for innovation in society.Unexpected discoveries in a particular area point to novel streams of innovation in other fields;new insights gained by theory shine light onto many so far untouched challenges.New methods and technologies in research trigger innovations in fields that were believed to be disparate for long.At the same time society expects science to solve important problems in the further development by health care and medicine,pave the road to sustainable technologies and industries that will increase the public wealth and thereby contribute to the well-being of the whole so-     

Glacial expansion of cold-tolerant species in low latitudes: megafossil evidence and species distribution modellingOA

<正>The Pleistocene was a time of repeated glaciations that severely affected the land biota over large areas of Eurasia and North America. Drastic climatic fluctuations during the Pleistocene drove largescale extinctions, migrations and diversification in plant and animal populations.These dramatic processes had a strong impact on the distribution of modern flora and fauna.     

Paleolithic Tools Discovered in the Eastern Coast of China

A group of CAS scientistsfound in 2002 Paleolithicartifacts made 800,000-500,000 years ago in Jinjiang City,Fujian Province. Scientists believethe findings outdate the knownprehistorical records in the provinceby hundreds of thousands of years.In May 2002, Yuan Baoyin, ageologist from the CAS Institute ofGeology & Geophysics, and his col-leagues brought to light some stonelumps with discernible flaking tracesfrom seaside facies of sands, blown-reddish clay and reticulated red soilon a hi…     

Challenges and opportunities for modeling coupled human and natural systemsOA

<正>The Earth is a very large and complex system that consists of human and natural components interacting bidirectionally with each other,thus forming coupled human and natural systems (CHANS)[1].The increasing dominance of human impacts,especially after the 1950s [2],marked a new era for the Earth,the Anthropocene,which means humans have become the main drivers of the evolution of changes in the Earth system.Therefore,modeling CHANS is essential for understanding the emergent system prope...