Researchers found that live poultry markets were the primary source of the novel H7N9 influenza virus. The viruses originated from avian H9N2 viruses but acquired human receptor-binding specificity, contributing to their virulence and lethality in humans. Strong measures are recommended to prevent a possible pandemic.
Researchers developed novel converters for Bulk-Micromegas detectors, increasing neutron detection efficiency by threefold. The new design enables 2D neutron beam monitoring with low detection efficiency detectors.
Researchers have found that basin sediments recorded the formation process of the Dabie orogen, providing crucial information on subduction and rapid exhumation. The study suggests a gradual transition from shortening to extension during the Mesozoic era, with the depth of exhumation increasing eastwards.
Household carbon emissions in Northwestern China are mainly affected by geographic environment, family size, and income, with a relatively low per capita emission of 2.05 tons CO2. Household carbon emission varies between urban and rural households, as well as between provinces.
A low-carbon hybrid energy system is proposed to integrate coal with nuclear, wind, solar, biomass, and hydro power to reduce CO2 emission and recycle carbon. The system utilizes carbon recycling to produce useful materials while increasing energy efficiency.
Researchers report a gigantic jet event over a thunderstorm in mainland China, with a tree-like shape and unique storm characteristics. The study uses multiple data sets to analyze the event and its associated storm.
Topological insulators have surface states that are conducting and possess unique properties, including the Aharanov-Bohm effect. Hybrid structures with superconductors show promise for new physics and technological applications, such as Majorana fermions and fractional Josephson effects.
A new method uses static code analysis to guide test case generation, detecting common types of concurrency errors. It outperforms existing methods by integrating dynamic analysis and minimizing false positives.
The COMPASS satellite navigation system achieves millimeter-level accuracy for GPS static points and meter-level accuracy for real-time users. However, systematic offsets exist between COMPASS and GPS precise positioning, indicating errors in measurement and dynamic models.
Researchers propose novel protocol structure model to analyze and verify service-oriented systems, incorporating dependencies for synchronous, asynchronous, and broadcast communications. The model combines features of partial orders and Petri nets to tackle complex software development challenges.
The special issue covers 17 review articles on various spintronics topics, including magneto-electronics and semiconductor spintronics. It aims to introduce the framework of spintronics and stimulate new ideas by showcasing domestic research results.
A recent study used bird watching records to build the first bird watching database in China, finding new national-level records and a trend of species moving to higher latitude and elevation regions. The database provides valuable data for scientific research on ecosystem health and biodiversity.
A new anti-windup design paradigm was developed to improve control system performance in the presence of actuator saturation. The triple loop anti-windup design outperforms other methods, demonstrating stronger ability to recover nominal closed-loop performance.
Researchers discover engraved stone artifact in northwest China, providing evidence of human symbolic and cognitive capabilities during the Late Paleolithic era. The find, dated to approximately 30 ka BP, suggests that humans in East Asia may have possessed complex communicative systems, including language.
Researchers developed a large dynamic, reconfigurable, distributed I-ROF system to meet the growing demand for broadband and ubiquitous information access. The system offers flexible wireless access and fiber-optic broadband transmission, providing effective solutions for modern information society.
Recent studies have elucidated the mechanisms of lanthanide biological actions, indicating that these metals can alter neural functions. High doses and chronic exposure are associated with neural system damage, particularly in pregnant and lactating animals.
A novel imaging method based on SISAR is proposed to extract the target profile accurately in forward scatter radar (FSR). The method can effectively deduce the target type, such as a cruise missile or unmanned aerial vehicle. Simulations are conducted to evaluate the validity of the algorithm, showing promising results for stealth tar...
Researchers propose a continuum-based model that illustrates contact line pinning at phase interfaces between materials, differing from traditional Wenzel and Cassie models. The study shows the macroscopic contact angle depends solely on the triple contact line's properties.
The study provides a comprehensive review of the Yuzhou Flora, recognizing 111 genera and 307 species from 40 fossil plant layers. The authors propose hypotheses on evolutionary trends in leaf structure and venation patterns, as well as a new morphotype classification scheme for Gigantopteridales.
The North China Craton's thin lithosphere and signs of thermo-tectonic reactivation challenge the traditional view of a stable cratonic lithosphere. The concept of 'craton destruction' has been widely accepted, influencing understanding of intraplate magmatism and continental evolution.
Soil respiration in China varies significantly across regions, with the highest rates found in southeastern China and lowest in northwestern China. Precipitation and temperature also play a crucial role in controlling soil respiration, with increasing variability expected under warming scenarios.
Researchers from Chinese Academy of Sciences and Tsinghua University presented additional, previously unknown geometries corresponding to all possible kinematical algebras. These geometries are classified into three relativistic geometries, absolute-time geometries, and absolute-space geometries, each with unique properties.
Researchers enhance local electric fields around nanorods using metal grooves to improve surface-enhanced Raman scattering (SERS) intensity. The nanorod-groove system produces larger electric fields than individual nanorods or traditional systems, increasing SERS sensitivity and accuracy.
Researchers at IMUT have developed a method to analyze nanoscale deformation fields of a crack-tip, mapping pure shear strain at the atomic scale. The study provides new insights into fracture mechanics, paving the way for further research on dynamic crack-tips and various materials.
The proposed algorithm generates feature sensitive non-uniformly distributed discrete sample points for underlying point sets. It uses a Gaussian sphere-based sampling scheme to simplify the point set surfaces, and then applies an adaptive re-sampling framework to generate the desired samples.
Scientists discovered Lepidopteris baodensis, a 251-million-year-old seed fern with subepidermal swellings that may have allowed it to survive in hot, arid environments. The finding expands knowledge of the genus' biology and taxonomy, as well as its relationship to other plant species.
Researchers found that genes are only moderately sensitive for cadmium and zinc, but can be a more sensitive indicator for copper. The study suggests that genes may not be the best early warning indicator of ecological risks, contrary to previous assumptions. Further investigation is needed with more data.
A pre-cracked parallel-plate capacitor model is developed to analyze the role of electrostatic tractions in fracture and electric sticking behaviors. The study reveals a new fracture criterion based on energy release rate and crack opening, showing bifurcation behavior between mechanical and electric displacements.
Sparse microwave imaging combines sparse signal processing theory with microwave imaging to improve resolution and reduce system complexity. The new concept enables faster calculation of large-scale scenes, making it suitable for wide mapping swath applications.
Researchers propose a structure-aware image stylization method to generate artistic effects using single digital images as input. The approach preserves fine structure details and executes efficiently in real-time for large resolution images on a GPU, enhancing users' immersive feelings and recognition speed.
Researchers present SCautz, a hybrid intra-container network for modular datacenters, achieving high throughput and improved fault tolerance. The design combines base Kautz topology with redundant commercial switches, reducing costs while maintaining performance.
Researchers explore dark energy's impact on the Universe's fate, citing a 'big rip' scenario as a possibility with predicted timelines for object destruction. The study uses the Ma-Zhang parameterization to forecast the evolution of the Universe.
The evolutionary block cipher outperforms known cryptosystems in resisting both linear and differential attacks by introducing evolving encryption algorithms. This design feature enhances the system's security and efficiency, making it a promising solution for modern cryptography.
The variable camber airfoil has obvious advantages in controlling separation and flight maneuverability. Research shows that the stall type determines the distinction between different camber deformation paths, with trailing-edge stalls being softer and having higher lift.
Researchers studied the water boatman's hind wings, which exhibit superhydrophobicity, playing a crucial role in its swimming, breathing, and balance. The study reveals that the insect's wing surface contains low surface energy materials, creating a hierarchical structure that enables it to swim freely and escape easily from water.
Researchers have discovered that thermal noise can cause unidirectional motion in nanoscale systems with asymmetric structures. By considering the finite autocorrelation time of thermal noise, they show that this effect is feasible even at room temperature.
Researchers have successfully developed a genetically modified microorganism that produces high levels of arachidonic acid, a key fatty acid essential for infant nutrition. The microorganism, produced through ion beam mutation breeding, has shown promise for industrial application and potential use as a sustainable bio-diesel source.
Researchers have developed a closed-loop fabrication method to tailor graphene into desired edge structures and shapes. The technique uses interaction forces as real-time feedback, allowing for precise cutting control. This innovation has the potential to fabricate large-scale graphene-based nanodevices at low cost with high efficiency.
The study used proteomic techniques to analyze the effects of grafted methoxypoly(ethylene glycol) on plasma protein adsorption. Results showed that the polymer-mediated surface camouflage prevented immune recognition signals, enhancing biocompatibility and reducing alloimmunization.
Chinese researchers develop a method to solve the specific heat-phonon spectrum inversion problem, enabling the calculation of thermodynamic functions from heat capacity data. They successfully apply this approach to the negative thermal expansion material ZrW2O8, obtaining consistent results with laws of thermodynamics.
A study reveals that urban rail traffic induces significant environmental vibrations in the short wavelength range, caused by uneven wheel-rail contact. The researchers found that the source function for these vibrations is better described by a power spectral density function of wheel-rail contact rather than track contact.
A new coupled normal mode method is presented to solve range-dependent propagation problems in underwater acoustics. The proposed method is accurately validated through comparison with analytical solutions and demonstrates high computational efficiency.
The study found that woodpeckers' cranial bones have a higher ultimate strength than larks, thanks to more plate-like spongy bone. This structure helps resist deformation during pecking, reducing stress on the brain. The beaks of both birds exhibit similar ultimate strengths.
Researchers have successfully developed a new type of environment-friendly piezoelectric material with giant piezoresponse, using small-ion-doped ZnO. The new material shows promising potential for replacing lead-based piezoelectric materials, which are highly toxic and can contaminate environments.
Researchers have developed a simple and effective approach to reduce the threshold voltage of pentacene thin film transistors, while maintaining high mobility. By inserting a thin metal phthalocyanine interlayer, they achieved significant performance enhancement, including reduced threshold voltage and increased carrier mobility.
Researchers have developed novel dual solidification mechanisms for a ternary Fe47.5Cu47.5Sn5 peritectic-type alloy, enabling the effective synthesis of advanced materials. The mechanisms involve peritectic solidification at moderate undercoolings and macroscopic phase separation at greater undercoolings.
Organic aerosol is a significant fraction of fine particles in Beijing, with key role in air pollution. Recent study characterizes winter organic aerosols using high-resolution measurements, revealing prominent accumulation mode and photochemical characteristics.
Scientists have discovered primary exhalative hydrothermal dolostone in the Santanghu area of Xinjiang, China. The dolostone is believed to have formed via mantle-originated hydrothermal activities, providing valuable evidence for primary dolomite formation in geological history.
Researchers develop three methods to improve gravitational field models of Phobos, using high-resolution shape data and comparisons show good consistency. The updated model provides a more detailed understanding of Phobos' physical properties, including its volume and surface gravity.
A new study reveals that a sand layer plays a crucial role in protecting the underlying permafrost in the Qinghai-Tibet Plateau. The research found that thick sand layers near the permafrost table reduced ground temperatures, while thin sand layers allowed for some thawing.