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Simulation for MSS-2 low-perigee elliptical orbit satellites:an example of lithospheric magnetic field modelling

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Earth and Planetary Physics 2023年第1期7卷 151-160页

作者： yi jiang Nils Olsen JiaMing Ou Qing Yan State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyTaipa 999078MacaoChina Division of Geomagnetism DTU SpaceNational Space InstituteTechnical University of DenmarkDiplomvej 3712800 Kgs.LyngbyDenmark

A future constellation of at least four geomagnetic satellites(designated Macao Scientific Satellite-1(MSS-1)and Macao Scientific Satellite-2(MSS-2))was recently proposed,to continue high-quality geomagnetic observations in the post-Swarm period,focusing especially on collecting data that will provide a global,three-dimensional survey of the geomagnetic *** this paper,we present a simulation of two years of orbits(2020.01.01-2022.01.01)of two satellites(tentatively denoted as MSS-2)that are constellated in elliptical(200×5,300 km)low-perigee *** comparing error variances of Gauss coefficients,we investigate the sensitivity of lithospheric magnetic field modelling to data collected from various satellite orbits,including a near circular reference orbit of 300×350km,and elliptical orbit of 180×5,300 km,220×5,300 km,200×3,000 km and 200×1,500 *** find that in two years the two MSS-2 satellites can collect 35,000 observations at altitude below 250 km,data that will be useful in advancing the quality of lithospheric magnetic field modelling;this number of observations reflects the fact that only 4.5%of the flight time of these satellites will be below250 km(just 6.4%of their flight time below 300 km).By combining observations from the MSS-2 satellites’elliptical orbits of 200×5,300km with observations from a circular reference orbit,the variance of the geomagnetic model can be reduced by a factor of 285 at spherical harmonic degree n=200 and by a factor of 1,300 at n=*** planned lower perigee of their orbits allows the new satellites to collect data at unprecedentedly lower altitudes,thus dramatically improving the spatial resolution of satellite-derived lithospheric field models,(up to 80%at n=150).In addition,lowering the apogee increases the time interval during which the satellites fly at near-Earth altitudes,thus improving the model predictions at all spherical harmonic degrees(around 52%-62%at n=150).The upper limit of the expected improvement to t

关键词： elliptical orbit satellite orbit simulation lithosphere field modelling spherical harmonics

Allowable variation of cold-rolled strip transverse profiles in high tension

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International Journal of Minerals,Metallurgy and Materials 2010年第5期17卷 608-616页

作者： Xiao-chen Wang Quan Yang Xiao-zhong Du Zheng-yi jiang National Engineering Research Center of Flat Rolling Equipment University of Science and Technology Beijing Beijing 100083 China School of Mechanical Materials ＆ Mechatronic Engineering University of Wollongong Wollongong NSW 2522 Australia

The formation mechanism of the cold-rolled strip shape with high tension was studied. An advanced method to calculate the allowable variation of strip transverse profiles was established by the strip buckling criterion, which can be more properly used in cold rolling. With this method, the aim allowable variation of the product strip transverse profile and the required transverse profile range of incoming strips can be reached. Besides, this method has been successfully applied in a domestic tandem cold mill, and the transverse profile range of incoming strips suggested with this method is more practicable and complete. Consequently, the good performance is acquired.

关键词： cold rolling strips high tension buckling

Glucose metabolic reprogramming-related parameters for the prediction of 28-day neurological prognosis and all-cause mortality in patients after cardiac arrest:a prospective single-center observational study

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World Journal of Emergency Medicine 2024年第3期15卷 197-205页

作者： Subi Abudurexiti Shihai Xu Zhangping Sun yi jiang Ping Gong Department of Emergency Medicine Ruijin Hospital Affi liated to Shanghai Jiaotong University School of MedicineShanghai 200025China Department of Emergency Medicine Shenzhen People's Hospital(the Second Clinical Medical CollegeJinan Universitythe First Affi liated HospitalSouthern University of Science and Technology)Shenzhen 518020China Department of Emergency Medicine the First Affi liated Hospital of Dalian Medical UniversityDalian 116011China Department of Emergency Medicine General Hospital of Tianjin Medical UniversityTianjin 300052China

BACKGROUND:We aimed to observe the dynamic changes in glucose metabolic reprogrammingrelated parameters and their ability to predict neurological prognosis and all-cause mortality in cardiac arrest patients after the restoration of spontaneous circulation(ROSC).METHODS:Adult cardiac arrest patients after ROSC who were admitted to the emergency or cardiac intensive care unit of the First Aflliated Hospital of Dalian Medical University from August 1,2017,to May 30,2021,were *** to 28-day survival,the patients were divided into a non-survival group(n=82) and a survival group(n=38).Healthy adult volunteers(n=40) of similar ages and sexes were selected as *** serum levels of glucose metabolic reprogrammingrelated parameters(lactate dehydrogenase [LDH],lactate and pyruvate),neuron-specific enolase(NSE) and interleukin 6(IL-6) were measured on days 1,3,and 7 after *** Acute Physiology and Chronic Health Evaluation II(APACHE II) score and Sequential Organ Failure Assessment(SOFA) score were *** Cerebral Performance Category(CPC) score was recorded on day 28 after ***:Following ROSC,the serum LDH(607.0 U/L vs.286.5 U/L),lactate(5.0 mmol/L vs.2.0 mmol/L),pyruvate(178.0 μmol/L vs.70.9 μmol/L),and lactate/pyruvate ratio(34.1 vs.22.1) significantly increased and were higher in the non-survivors than in the survivors on admission(all P<0.05).Moreover,the serum LDH,pyruvate,IL-6,APACHE II score,and SOFA score on days 1,3 and 7 after ROSC were significantly associated with 28-day poor neurological prognosis and 28-day all-cause mortality(all P<0.05).The serum LDH concentration on day 1 after ROSC had an area under the receiver operating characteristic curve(AUC) of 0.904 [95% confidence interval [95% CI]:0.851–0.957]) with 96.8% specificity for predicting 28-day neurological prognosis and an AUC of 0.950(95% CI:0.911–0.989) with 94.7% specificity for predicting 28-day all-cause mortality,which was the highest among the glucose metabo

关键词： Glucose metabolic reprogramming Lactate dehydrogenase Cardiac arrest Prognosis

Influence of electroacupuncture on ghrelin and the phosphoinositide 3-kinase/protein kinase B/endothelial nitric oxide synthase signaling pathway in spontaneously hypertensive rats

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Journal of Integrative Medicine 2022年第5期20卷 432-441页

作者： Yue Zhang Dong-ling Zhong Ya-ling Zheng Yu-xi Li yi-jie Huang yi-jing jiang Rong-jiang Jin Juan Li School of Health Preservation and Rehabilitation Chengdu University of Traditional Chinese MedicineChengdu 610075Sichuan ProvinceChina Department of Rehabilitation Medicine The Second People’s Hospital of ChengduChengdu 610017Sichuan ProvinceChina Department of Rehabilitation Medicine The Seventh Affiliated Hospital of Sun Yat-Sen UniversityShenzhen 518107Guangdong ProvinceChina Department of Rehabilitation Medicine Rehabilitation Hospital Affiliated to Fujian University of Traditional Chinese MedicineFuzhou 350003Fujian ProvinceChina

Objective To investigate the influence of electroacupuncture(EA)on ghrelin and the phosphoinositide 3-kinase/protein kinase B/endothelial nitric oxide synthase(PI3K/Akt/eNOS)signaling pathway in spontaneously hypertensive rats(SHRs).Methods Eight Wistar-Kyoto rats were used as the healthy blood pressure(BP)control(normal group),and 32 SHRs were randomized into model group,EA group,EA plus ghrelin group(EA+G group),and EA plus PF04628935 group(a potent ghrelin receptor blocker;EA+P group)using a random number *** in the normal group and model group did not receive treatment,but were immobilized for 20 min per day,5 times a week,for 4 continuous *** in the EA group,EA+G group and EA+P group were immobilized and given EA treatment in 20 min sessions,5 times per week,for 4 ***,1 h before EA,SHRs in the EA+G group and EA+P group were intraperitoneally injected with ghrelin or PF04628935,respectively,for 4 *** tail-cuff method was used to measure *** the 4-week intervention,the rats were sacrificed by cervical dislocation,and pathological morphology of the abdominal aorta was observed using hematoxylin-eosin(HE)***-linked immunosorbent assay(ELISA)was used to detect the levels of ghrelin,nitric oxide(NO),endothelin-1(ET-1)and thromboxane A2(TXA2)in the *** thoracic aortic ring experiment was performed to evaluate *** blot was used to measure the expression of PI3K,Akt,phosphorylated Akt(p-Akt)and eNOS proteins in the abdominal ***,quantitative real-time polymerase chain reaction(qRT-PCR)was conducted to measure the relative levels of mRNA expression for PI3K,Akt and eNOS in the abdominal *** EA significantly reduced the systolic BP(SBP)and diastolic BP(DBP)(P<0.05).HE staining showed that EA improved the morphology of the vascular endothelium to some *** of ELISA indicated that higher concentrations of ghrelin and NO,and lower concentrations of ET-1 and TXA2 we

关键词： Electroacupuncture Hypertension Vascular endothelial dysfunction Ghrelin PI3K/Akt/eNOS signaling pathway

Technological advances in cancer immunity:from immunogenomics to single-cell analysis and artificial intelligence

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Signal Transduction and Targeted Therapy 2021年第9期6卷 2674-2696页

作者： ying Xu Guan-Hua Su Ding Ma yi Xiao Zhi-Ming Shao yi-Zhou jiang Key Laboratory of Breast Cancer in Shanghai Department of Breast SurgeryFudan University Shanghai Cancer CenterShanghaiChina Department of Oncology Shanghai Medical CollegeFudan UniversityShanghaiChina Institutes of Biomedical Sciences Fudan UniversityShanghaiChina

Immunotherapies play critical roles in cancer ***,given that only a few patients respond to immune checkpoint blockades and other immunotherapeutic strategies,more novel technologies are needed to decipher the complicated interplay between tumor cells and the components of the tumor immune microenvironment(TIME).Tumor immunomics refers to the integrated study of the TIME using immunogenomics,immunoproteomics,immune-bioinformatics,and other multi-omics data reflecting the immune states of tumors,which has relied on the rapid development of next-generation ***-throughput genomic and transcriptomic data may be utilized for calculating the abundance of immune ceils and predicting tumor antigens,referring to ***,as bulk sequencing represents the average characteristics of a heterogeneous cell population,it fails to distinguish distinct cell ***-cell-based technologies enable better dissection of the TIME through precise immune cell subpopulation and spatial architecture *** addition,radiomics and digital pathology-based deep learning models largely contribute to research on cancer *** artificial intelligence technologies have performed well in predicting response to immunotherapy,with profound significance in cancer *** this review,we briefly summarize conventional and state-of-the-art technologies in the field of immunogenomics,single-cell and artificial intelligence,and present prospects for future research.

关键词： immuno immunity artificial

Wetting alternating with partial drying during grain filling increases lysine biosynthesis in inferior rice grain

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The Crop Journal 2024年第1期12卷 262-270页

作者： yi jiang Wenli Tao Weiyang Zhang Zhiqin Wang Jianchang Yang jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009JiangsuChina

Lysine content is a criterion of the nutritional quality of *** the process of lysine biosynthesis in early-flowering superior grain(SG)and late-flowering inferior grain(IG)of rice would advance breeding and cultivation to improve nutritional ***,little information is available on differences in lysine anabolism between SG and IG and the underlying mechanism,and whether and how irrigation regimes affect lysine anabolism in these grains.A japonica rice cultivar was grown in the field and two irrigation regimes,continuous flooding(CF)and wetting alternating with partial drying(WAPD),were imposed from heading to the mature *** content and activities of key enzymes of lysine biosynthesis,and levels of brassinosteroids(BRs)were lower in the IG than in the SG at the early grainfilling stage but higher at middle and late grain-filling *** increased activities of these key enzymes,BR levels,and contents of lysine and total amino acids in IG,but not SG relative to *** of 2,4-epibrassinolide to rice panicles in CF during early grain filling reproduced the effects of WAPD,but neither treatment altered the activities of enzymes responsible for lysine catabolism in either SG or *** and elevated BR levels during grain filling increased lysine biosynthesis in *** in lysine biosynthesis in rice should focus on IG.

关键词： Brassinosteroids Inferior grain Lysine biosynthesis Rice Wetting alternating with partial drying

Materials,fundamentals,and technologies of liquid metals toward carbon neutrality

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Science China(Technological Sciences) 2023年第6期66卷 1576-1594页

作者： DENG YueGuang E ErTai LI Jing jiang yi MEI ShengFu YU Yang School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Ruixin College Beijing Institute of TechnologyBeijing 100081China Jinggong College Beijing Institute of TechnologyBeijing 100081China North Information Control Research Academy Group Co. Ltd.Yangzhou 225001China Beijing DREAMInk Technologies Co. Ltd.Beijing 100080China

Carbon-neutral technologies are critical to ensure a stable future ***,low-melting-point liquid metals are emerging rapidly as important energy materials with significant potential to contribute to carbon *** advantages of gallium-and bismuth-based liquid metals,such as their high fluidity,low melting point,high thermal/electrical conductivity,unique chemical properties,non-flammability,and nontoxic characteristics,render them highly attractive for the development of advanced carbon-neutral *** their significance in both academia and industry has increased gradually,to the best of our knowledge,a systematic monograph of liquid-metal materials,mechanisms,and technologies toward carbon neutrality is not yet ***,we presented a comprehensive review of low-melting-point liquid metals for carbon ***,liquid-metal materials,including fluids,pastes,solids,and their composites were ***,the mechanisms of liquid-metal technologies used to achieve carbon neutrality were ***,typical liquid-metal applications of carbon neutrality in the power,industry,transport,and building sectors were *** the fundamental mechanisms and promising technologies were elaborated upon,and the critical assessment criteria for carbon-neutral technologies were *** scientific and technical challenges and future perspectives in these areas were also highlighted.

关键词： liquid metal carbon neutrality heat transfer battery hydrogen catalyst carbon capture

Mechanism of a Variable Optical Attenuator Based on Guided Wave Resonance

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Chinese Physics Letters 2001年第9期18卷 1288-1290页

作者： jiang yi CAO Zhuang-Qi DOU Xiao-Ming Molecular Photonics Laboratory Department of PhysicsShanghai Jiao Tong UniversityShanghai 200240

The mechanism of an electrically controlled variable optical attenuator is investigated based on the varying energy coupling efficiency of a light beam into a guided wave resonance. Compared to the conventional attenuated totalinternal reflection devices based on the surface plasmon resonance, the driving voltage for this attenuator is greatly reduced because of the newly chosen working interior angle. This letter explains the principle of attenuator operation and presents experimental results obtained on a realization of the device.

关键词： realization driving interior

Relationships between leaf color changes,pigment levels,enzyme activity,photosynthetic fluorescence characteristics and chloroplast ultrastructure of Liquidambar formosana Hance

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Journal of Forestry Research 2022年第5期33卷 1559-1572页

作者： Guoping yin Yong Wang Yufei Xiao Jisheng Yang Renjie Wang ying jiang Ronglin Huang Xiongsheng Liu yi jiang Guangxi Key Laboratory of Superior Trees Resource Cultivation Guangxi Zhuang Autonomous Region Forestry Research InstituteNanning 530002People’s Republic of China Guangxi University Nanning 53000People’s Republic of China

Liquidambar formosana Hance is an attractive landscape tree species because its leaves gradually change from green to red,purple or orange in *** this study,the red variety of *** was used to establish a quantitative model of leaf *** changes in leaf color,pigment levels,enzyme activity,photosynthetic fluorescence characteristics and chloroplast ultrastructure were *** relationship between leaf color and physiological structure indices was quantitatively analyzed to systematically explore the mechanisms behind leaf *** data showed that with a decrease in external temperatures,chloroplast numbers and sizes gradually decreased,thylakoid membranes became distorted,and chlorophyll synthesis was blocked and gradually *** a result,chloroplast membranes could not be biosynthesized normally;net photosynthesis,maximum and actual photochemical efficiency,and rate of electron transfer decreased *** light energy caused leaf *** intensification of photoinhibition,leaves protected themselves using two *** the first,anthocyanin synthesis was promoted by increasing chalcone isomerase and flavonoid glycosyltransferase activities and soluble sugar content so as to increase anthocyanin to filter light and eliminate reactive oxygen species to reduce *** the second,excessive light energy was consumed in the form of heat energy by increasing the non-photochemical quenching *** processes tuned the leaves red.

关键词： Anthocyanins Leaf color parameter Enzymatic activities Chlorophyll fluorescence characteristics Liquidambar formosana