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The Green Wall of Aksu

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China Today 2024年第3期73卷 56-57页

作者： ZHANG XI 不详

An afforestation project transforms a desert prefecture in Xinjiang into an oasis.YUSUPJAN Alim would win any reality show like Survivor hands down.The 36-year-old forest ranger started his career planting trees in the bleak and blazing Gobi Desert in 2004 in circumstances entirely different from today’s.At that time,there were no mobile phones,no GPS or transportation.The team would drive deep into the desert in a truck,carrying naans,the flatbread of Xinjiang that keeps for days.It was their staple,if not only,food.“We lived on Xinjiang naans and water for 15-20 days while working in the desert,”Yusupjan said.“We would dip the naan into water to make it soft.”When they worked,they tied their food in a bundle around their body so that if they got separated or even lost in the hostile desert,they would still have food.Every time they went in,Yusupjan would note the way carefully so that even if he got separated from his co-workers,he could still walk out of the desert alive.

关键词： separated bundle Desert

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NEWSBRIEF

China Weekly 2024年第6期 10-11页

China's Chang'e-6 lunar probe successfully entered lunar orbit following a near-moon braking procedure on May 8,according to the China National Space Administration(CNSA).The probe was launched from a Chinese Long March-5 carrier rocket on May 3 from the Wenchang Space Launch Site in southern Hainan Province.After about 37 minutes,it separated from the rocket and entered the planned Earth-moon transfer orbit,which the CNSA said has a perigee altitude of 200 kilometers and an apogee of 380,000 kilometers.

关键词： braking altitude separated

Phase-separated nucleocapsid protein of SARS-CoV-2 suppresses cGAS-DNA recognition by disrupting cGAS-G3BP1 complex

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Signal Transduction and Targeted Therapy 2023年第5期8卷 2392-2407页

作者： Sihui Cai Chenqiu Zhang Zhen Zhuang Shengnan Zhang Ling Ma Shuai Yang Tao Zhou Zheyu Wang Weihong Xie Shouheng Jin Jincun Zhao Xiangdong Guan Jianfeng Wu Jun Cui Yaoxing Wu Guangdong Province Key Laboratory of Pharmaceutical Functional Genes The First Affiliated Hospital of Sun Yat-sen UniversitySchool of Life SciencesSun Yat-sen UniversityGuangzhouGuangdongChina MOE Key Laboratory of Gene Function and Regulation State Key Laboratory of BiocontrolSchool of Life SciencesSun Yat-sen UniversityGuangzhouGuangdongChina State Key Laboratory of Respiratory Disease Guangzhou Institute of Respiratory DiseaseThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdongChina Department of Critical Care Medicine The First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdongChina

Currently,the incidence and fatality rate of SARS-CoV-2 remain continually high worldwide.COVID-19 patients infected with SARS-CoV-2 exhibited decreased type I interferon(IFN-I)signal,along with limited activation of antiviral immune responses as well as enhanced viral infectivity.Dramatic progresses have been made in revealing the multiple strategies employed by SARS-CoV-2 in impairing canonical RNA sensing pathways.However,it remains to be determined about the SARS-CoV-2 antagonism of cGAS-mediated activation of IFN responses during infection.In the current study,we figure out that SARS-CoV-2 infection leads to the accumulation of released mitochondria DNA(mtDNA),which in turn triggers cGAS to activate IFN-I signaling.As countermeasures,SARS-CoV-2 nucleocapsid(N)protein restricts the DNA recognition capacity of cGAS to impair cGAS-induced IFN-I signaling.Mechanically,N protein disrupts the assembly of cGAS with its co-factor G3BP1 by undergoing DNA-induced liquid-liquid phase separation(LLPS),subsequently impairs the double-strand DNA(dsDNA)detection ability of cGAS.Taken together,our findings unravel a novel antagonistic strategy by which SARS-CoV-2 reduces DNA-triggered IFN-I pathway through interfering with cGAS-DNA phase separation.

关键词： interferon separated cGAS

Deep learning enabled single-shot absolute phase recovery in high-speed composite fringe pattern profilometry of separated objects

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Opto-Electronic Advances 2023年第12期6卷 1-4页

作者： Maciej Trusiak Malgorzata Kujawinska Institute of Micromechanics and Photonics Warsaw University of Technology8 Sw.A.Boboli StreetWarsaw 02-525Poland.

A recent article in the Opto-Electronic Advances(OEA)journal from Prof.Qian Chen and Prof.Chao Zuo’s group introduced a new and efficient 3D imaging system that captures high-speed images using deep learning-enabled fringe projection profilometry(FPP).In this News&Views article,we explore potential avenues for future advancements,including expanding the measurement range through an extended number-theoretical approach,enhancing quality through the incorporation of horizontal fringes,and integrating data from other modalities to broaden the system's applications.

关键词： system absolute separated

Spatially charge-separated 2D homojunction for photocatalytic hydrogen production

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Rare Metals 2023年第12期42卷 3952-3959页

作者： Xi-Juan Wang Sai-Sai Yuan Lei Yang Ying Dong Yi-Ming Chen Wu-Xiang Zhang Chuan-Xiang Chen Qi-Tao Zhang Teruhisa Ohno School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Department of Applied Chemistry Faculty of EngineeringKyushu Institute of TechnologyKitakyushu 804-8550Japan

Suppression of photogenerated charge recombination is crucial for efficient photocatalytic hydrogen production.Homojunctions have garnered more attention than heterojunctions due to their superior crystal binding and band structure matching.However,most homojunctions suffer from redox interference caused by continuous oxidizing and reducing phases that impede the ability to improve photocatalytic activity.Consequently,the preparation of homojunction photocatalysts with completely spatial separation of both in charge and redox phases remains challenging.Here,the preparation of a two-dimensional(2D)homojunction CeO_(2) with a back-to-back geometry and fully separated oxidizing and reducing phases is reported.The prepared CeO_(2) is composed of nanosheets with twocontrasting smooth and rough surfaces.Experimental and theoretical results indicate that the rough surface contains more highly reducing CeO_(2){220}and strongly visiblelight-absorbing CeO_(2){200}facets than the smooth surface.The 2D homojunction CeO_(2) produces three-times more hydrogen than normal CeO_(2) nanosheets,and even more than that of CeO_(2) nanosheets loaded with gold nanoparticles.This work presents a new homojunction photocatalyst model with completely spatial separation of both in charge and redox phases that is expected to inspire further research into homojunction photocatalysts.

关键词： hydrogen charge separated

Range-separated hybrid functionals for accurate prediction of band gaps of extended systems

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npj Computational Materials 2023年第1期9卷 1237-1245页

作者： Jing Yang Stefano Falletta Alfredo Pasquarello Chaire de Simulationàl’Echelle Atomique(CSEA) Ecole Polytechnique Fédérale de Lausanne(EPFL)Lausanne CH-1015Switzerland

In this work,we systematically evaluate the accuracy in band gap prediction of range-separated hybrid functionals on a large set of semiconducting and insulating materials and carry out comparisons with the performance of their global counterparts.We observe that all the range-separated hybrid functionals that correctly describe the long-range dielectric screening significantly improve upon standard hybrid functionals such as PBE0 and HSE06.The choice of the short-range Fock exchange fraction and the screening length can further reduce the predicted error.We then propose a universal expression for the selection of the inverse screening parameter as a function of the short-range and long-range Fock exchange fractions,which results in a mean absolute error as small as 0.15 eV for band gap prediction.

关键词： separated functionals exchange

OSCILLATION　FREQUENCY　THEORY　OF　A　PIEZOELECTRIC　SENSOR　INLIQUID　PHASE　WITH　TWO　separated－ELECTRODES

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Chinese Chemical Letters 1996年第2期7卷 169-172页

作者： Da Zhong SHEN Ze Chang LIU Qing KANG Jind Tian HU(Chemistry College, Shandong University, Jinan, 250100)(Chemical Engineering Department, Jinan Branch of Shandong Institute of Mining and Technology, Jinan, 280031) Chemistry College Shandong University Jinan 250100 Chemical Engineering Department Jinan Branch Shandong Institute of Mining and Technology Jinan 250031

In this paper, an oscillation frequency equation for a pizoelectric sensor with two separated-electrodes is theoretically derived and experimentally verified. The correlatione of the oscillation frequency and the liqu... 详细信息

关键词： SENSOR FREQUENCY INLIQUID OF OSCILLATION PHASE PIEZOELECTRIC ELECTRODES separated THEORY

A preliminary study on spatial unmasking of virtual separated sources

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Science China(Physics,Mechanics & Astronomy) 2008年第10期51卷 1565-1572页

作者： XIE ZhiWen JIN Jing School of Physics South China University of TechnologyGuangzhou 510640China

An experimental method with headphone virtual reproduction is proposed and a series of experiments to study forward masking effect when the masker and the masked signal are spatially separated in azimuth are conducted. Then, the masking thresholds are compared with those when the masker and the masked signal source are at the same place. The results show that, although both the thresholds of 0° and ±30° sound images increase with the sound pressure level (SPL) of the masker, spatial unmasking may be really observed. The maximum unmasking is as large as 15 dB. This spatial unmasking effect is mainly attributed to better-ear contribution.

关键词： spatial unmasking virtual separated sources forward masking

Secondary instability of separated shear layers

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Chinese Journal of Aeronautics 2019年第1期32卷 37-44页

作者： Zhiyin YANG Department of Mechanical Engineering and the Built Environment College of Engineering and TechnologyUniversity of Derby

The process through which a laminar flow undergoes transition to turbulence is of great fundamental and practical interest. Such a process is hugely complex as there are many diverse routes for a laminar flow to become turbulent flow. The transition process is usually initiated by flow instabilities—a primary instability stage followed by a secondary instability stage. This forms a rational framework for the early stage of a transition process and it is crucially important to understand the physics of instabilities leading to turbulence. This article reviews the results of studies on secondary instability of separated shear layers in separation bubbles and summaries the current status of our understanding in this area.

关键词： Primary instability Secondary instability separated shear layers Separation bubbles Transition