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Feeding behavior explains the different effects of cabbage on MEAM1 and MED cryptic species of Bemisia tabaci

Insect Science 2020年第6期27卷 1276-1284页

作者： Jie Hu Jin-jian Yang Bai-Ming Liu Hong-Ying Cui you-Jun Zhang Xiao-guo Jiao State Key Laboratory of Biocatalysis and Enzyme Engineering Center for Behavioral Ecology&EvolutionSchool of Life SciencesHubei UniversityWuhanChina Institute of Vegetables and Flowers Chinese Academy of Agricultural SciencesBeijingChina Tianjin Institute of Plant Protection TianjinChina Department of Entomology College of Plant ProtectionChina Agricultural UniversityBeijingChina

MEAMI(Middle East-Asia Minor 1."B"biotype)anpl MED(Mediterranean,"Q"biotype)are the two most destructive ery pie species of the Bemisia tabaci complex on the *** previous studies have shown that MEAMI outcompets MED on cabbage;the underlying mechanism is *** the Brassicaceae family,the glucosinolate-myrosinase defense system plays a crucial role im deterring feeding,inhibiting growth,and eausing acute toxicity against a wide range of generalist *** the present *** first compared the surv ival of MEAMI and MED exposed to sinigin(a glucosinolate)and myosinase(an enzyme that degrades glucosinolates);we found that survival of both species was high in response 10 sinigrin alone bul was near zer0 in response to sinigrin+*** then used electropenetrography(lectrical penetration graphs,EPG)to assess the feeding bchaviors of MEAMI and MED whiteflies on *** EPG results revealed that the me an dunution of each potential drop(pd,indicating an intreellular puncture)was subsantialy longer for MED than MEAMI on eabbage,indicating that the exposure to the toxic hydrolysates of glucosinolate and myrosinase is greater for MED than for *** therefore conclude that dffreces in penetrating bchaviors may help explain the dfferent fiects of cabbuge on MEAMI and MED whitefly species.

关键词： Bemisia tabaci glucosinolate-myrosinase system potential drop electrical penetration graph

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Risk factors for delayed hemorrhage after endoscopic sphincterotomy

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Hepatobiliary & Pancreatic Diseases International 2020年第5期19卷 467-472页

作者： Jing Yan Chun-Xia Zhou Chong Wang Yuan-Yuan Li Le-Ying Yang you-Xiang Chen jian-jian Hu guo-Hua Li Department of Gastroenterology The First Affiliated Hospital of Nanchang UniversityNanchang 330006China Department of Urology The First Affiliated Hospital of Nanchang UniversityNanchang 330006China

Background:Hemorrhage is one of the most serious complications of endoscopic sphincterotomy(EST).The risk factors for delayed hemorrhage are not *** study aimed to explore the risk factors for post-EST delayed hemorrhage and suggest some precautionary ***:This study analyzed 8477 patients who successfully underwent endoscopic retrograde cholangiopancreatography(ERCP)and EST between January 2007 and June 2015 in the First Affiliated Hospital of Nanchang *** and multivariate analyses were performed to find the risk factors for delayed hemorrhage after ***:Of the 8477 patients screened,137(1.62%)experienced delayed *** analysis showed that male,the severity of jaundice,duodenal papillary adenoma and carcinoma,diabetes,intraoperative bleeding,moderate and large incisions,and directional deviation of incision were risk factors for post-EST delayed hemorrhage(P<0.05).Multivariate analysis showed that intraoperative bleeding[odds ratio(OR)=3.326;95%CI:1.785–6.196;P<0.001]and directional deviation of incision(OR=2.184;95%CI:1.266–3.767;P=0.005)were independent risk factors for post-EST delayed ***:Delayed hemorrhage is the most common and dangerous complication of *** bleeding and directional deviation of incision are independent risk factors for post-EST delayed hemorrhage.

关键词： Endoscopic sphincterotomy Endoscopic retrograde cholangiopancreatography Hemorrhage Risk factors

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Impact of Si addition on high-temperature oxidation behavior of NiAlHf alloys

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Journal of Materials Science & Technology 2019年第9期35卷 2038-2047页

作者： JingJing jian He Hongbo guo School of Materials Science and Engineering Beihang University (BUM)Beijing 100191China Frontier Research Institute of Innovative Science and Technology Beihang University (BUM)Beijing 100191China Key Laboratory of High-temperature Structural Materials & Coatings Technology (Ministry o f Industry and Information Technology) Beihang University (BUM)Beijing 100191China

Silicon (Si) and reactive elements (REs) like hafnium (Hf) have favorable effects on improving the high-temperature oxidation resistance. To reveal the interaction effect between them, Si with different contents was added into P-NiAlHf alloy in this study. Cyclic oxidation behavior at 1200℃ was investigated. Results show that Si can increase the Hf-rich precipitates and suppress Hf outward diffusion, thus inhibit the RE effect leading to worse oxidation resistance. However, NiAlHf-5Si alloy exhibited a lower oxidation rate and better spallation resistance mainly because of the existence of micro-cracks and Ni2 Al3 phases which provided more rapid diffusion paths for Al^3+.

关键词： Intermetallic NiAl Rare earth element Thermal cycling Oxidation Segregation

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Strategic insights into the cultivation of pancreatic cancer organoids from endoscopic ultrasonography-guided biopsy tissue

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World Journal of Gastroenterology 2024年第42期30卷 4532-4543页

作者： Jia-Li Yang Jun-Feng Zhang jian-you Gu Mei Gao Ming-you Zheng Shi-Xiang guo Tao Zhang Institute of Hepatopancreatobiliary Surgery Chongqing General HospitalChongqing UniversityChongqing 401147China

BACKGROUND The frequent suboptimal efficacy of endoscopic ultrasound-guided fine-needle biopsy(EUS-FNB)to culture pancreatic cancer(PC)organoids(PCOs)poses a major challenge in the advancement of personalized medicine for advanced *** To explore how to obtain appropriate puncture tissues from EUS-FNB and optimize the strategy for efficiently constructing PCOs,providing an efficient tool for the advancement of personalized *** Patients who underwent EUS-FNB for the diagnosis of PC tissue were prospectively *** refined the endoscopic biopsy procedures and organoid cultivation *** tissue specimens verified by on-site pathological assessment were cultured in a semi-suspended medium in a microfluidic *** assessed differences in PCOs cultured beyond and below five generations examining patient demographics,specimen and organoid attributes,and the sensitivity of organoids to a panel of clinical drugs through cell viability *** In this study,16 patients with PC were recruited,one sample was excluded because onsite cytopathology showed no tumor *** organoid generation occurred in 93.3%(14 of 15)of the EUS-FNB specimens,with 60%(9 of 15)sustaining over five *** these patients,those with a history of diabetes,familial cancer,or larger tumors exhibited enhanced PCO *** key factors influencing longterm PCOs expansion included initial needle sample quality(P=0.005),rapid initiation of organoid culture postisolation(P≤0.001),and high organoid activity(P=0.031).Drug sensitivity analysis revealed a partial response in two patients following therapeutic intervention and surgery and stable disease in four patients,indicating a moderate correlation between organoid response and clinical *** Optimal initial needle sampling,rapid and precise biopsy sample processing,process isolated samples as soon as possible,and sufficient cellular material are crucial for successful cultiv

关键词： Endoscopic ultrasound-guided fine-needle biopsy Pancreatic cancer organoid Puncture technique Cultivation optimization strategy Drug screening

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Harnessing data using symbolic regression methods for discovering novel paradigms in physics

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 1-11页

作者： jianyang guo Wan-jian Yin College of Energy Soochow Institute for Energy and Materials Innovations(SIEMIS)Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006China Shanghai Qi Zhi Institute Shanghai 200232China Light Industry Institute of Electrochemical Power Sources Soochow UniversitySuzhou 215006China

In recent years,machine-learning methods have profoundly impacted research in the interdisciplinary fields of ***,most machine-learning models lack interpretability,and physicists doubt the credibility of their conclusions because they cannot be combined with prior physical ***,this review focuses on symbolic regression,which is an interpretable machine-learning ***,the relevant concepts of machine learning are introduced in conjunction with ***,we provide an overview of symbolic regression ***,the recent directions for the application of symbolic regression methods in different subfields of physics are outlined,and an overview of the ways in which the applications of symbolic regression have evolved in the realm of physics is *** major aim of this review is to introduce the basic principles of symbolic regression and explain its applications in the field of physics.

关键词： machine learning genetic programming symbolic regression

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Coupled 3D discrete-continuum numerical modeling of pile penetration in sand

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第1期13卷 44-55页

作者： jian ZHOU Qi-wei jian Jiao ZHANG jian-jun guo Department of Geotechnical Engineering Tongji University Shanghai 200092 China School of Civil Engineering and Transportation Shanghai Technical College of Urban Management Shanghai 200432 China Sichuan Provincial Chuanjian Investigation and Design Institute Chengdu 610017 China

A coupled discrete-continuum simulation incorporating a 3D aspect and non-circular particles was performed to analyze soil-pile interactions during pile penetration in sand.A self-developed non-circular particle numerical simulation program was used which considered sand near the pile as interacted particles using a discrete element method;the sand away from the pile was simulated as a continuous medium exhibiting linear elastic *** domain analyzed was divided into two *** forces at the interface between the two zones were obtained from a discrete zone and applied to the continuum boundaries as nodal forces,while the interface velocities were obtained from the continuum zone and applied to the discrete *** show that the coupled discrete-continuum simulation can give a microscopic description of the pile penetration process without losing the discrete nature of the zone concerned,and may significantly improve computational efficiency.

关键词： Coupled numerical modeling Discrete-continuum Micro and macro 3D simulation Non-circular particles Pilepenetration mechanism

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Non-premixed turbulent combustion modeling based on the filtered turbulent flamelet equation

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Science China(Physics,Mechanics & Astronomy) 2020年第4期63卷 119-124页

作者： jian Zhang LiPo Wang YuQing guo State Key Laboratory of Nonlinear Mechanics(LNM) Chinese Academy of SciencesBeijing 100190China UM-SJTU Joint Institute Shanghai Jiao Tong UniversityShanghai 200240China

In turbulent combustion simulations, the flow structure at the unresolved scale level needs to be reasonably modeled. Following the idea of turbulent flamelet equation for the non-premixed flame case, which was derived based on the filtered governing equations(L. Wang, Combust. Flame 175, 259(2017)), the scalar dissipation term for tabulation can be directly computed from the resolved flowing quantities, instead of solving species transport equations. Therefore, the challenging source term closure for the scalar dissipation or any assumed probability density functions can be avoided;meanwhile the chemical sources are closed by scaling relations. The general principles are discussed in the context of large eddy simulation with case validation. The new model predictions of the bluff-body flame show sufficiently improved results, compared with these from the classic progress-variable approach.

关键词： turbulent combustion modeling turbulent flamelet equation large eddy simulation non-premixed flame

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Sound absorption property of open-pore aluminum foams

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China Foundry 2007年第1期4卷 31-33页

作者： WANG Fang WANG Lu-cai WU jian-guo you Xiao-hong Department of Materials Science and Engineering Taiyuan University of Science and Technology Taiyuan 030024 Shanxi P. R.China

This paper presents a study on sound absorption property of aluminum foam by evaluating its sound absorption coefficients using standing wave tube method. Experimental results showed that the average values of sound absorption coefficients (over the test frequency range) are all above 0.4, which indicate very good sound absorption property of the aluminum foams. The sound absorption coefficient is affected by frequency and pore structure, and reaches its maximum value at around 1 000 Hz. With the increase of porosity and decrease of cell diameter, the sound absorption coefficient values increase.

关键词： aluminum foam sound absorption property sound absorption coefficients plane-wave impedance tube

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Application of pole-zero cancellation circuit in nuclear signal filtering and shaping algorithm

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Nuclear Science and Techniques 2021年第8期32卷 85-94页

作者： Huai-Ping Wang jian-Bin Zhou Xiao-Ping Ouyang Xian-guo Tuo Xu Hong Yi Liu Jie Yu you-Xian Jin College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyNo.1 East 3 RoadErxian BridgeChenghua DistrictChengdu 610059China Northwestern Institute of Nuclear Technology Xi’an 710024China Engineering Research Center of Nuclear Technology Application(East China University of Technology) Ministry of EducationNanchang 330013China

In radiation measurement and digital nuclear spectrum systems,traditional nuclear signal processing circuits in nuclear electronics have been gradually replaced by digital algorithm modules with the application of highperformance programmable hardware logic devices(such as FPGA or DSP).Referring to the digital realization method of inverse RC integral circuit systems,the function of the pole-zero cancellation(PZC)circuit was analyzed,a new modified cascade equivalent model of PZC was established,and the time-domain digital PZC(DPZC)recursive algorithm was derived in detail in this *** parameters kIand k_(D)are included in the new algorithm,where kIshould match the exponential decay time constant of the input signal to realize the pole-zero compensation,while the decay time constant of the output signal can be changed with the adjustable parameter k_(D)(which is larger than the decay time constant of the input signal).Based on the new DPZC algorithm module,two trapezoidal(triangular)shaping filters were designed and *** amplitude–frequency characteristics of the output signal of the proposed trapezoidal shaping algorithm and the convolution trapezoidal shaping algorithm were compared,with fixed peaking *** results show that the trapezoidal shaping algorithm based on DPZC can better suppress high-frequency ***,based on the Na I(Tl)scintillator(u75 mm×75 mm)detector and^(137)Cs source,the effect of the k_(D)value on the energy resolution of the DPZC trapezoidal(triangular)shaping algorithm was *** experimental results show that,with an increase in k_(D),the energy resolution of the system improved and reached the maximum when k_(D)was greater than 10,and the optimal energy resolution of the system was 7.72%.

关键词： Pole-zero cancellation C–R inverse system Trapezoidal/triangular shaping Amplitude–frequency characteristics Energy resolution

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Signal classification method based on data mining formulti-mode radar

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Journal of Systems Engineering and Electronics 2016年第5期27卷 1010-1017页

作者： qiang guo pulong nan jian wan College of Information and Communication Engineering Harbin Engineering University Harbin 150001 China

For the multi-mode radar working in the modern electronicbattlefield, different working states of one single radar areprone to being classified as multiple emitters when adoptingtraditional classification methods to process intercepted signals,which has a negative effect on signal classification. A classificationmethod based on spatial data mining is presented to address theabove challenge. Inspired by the idea of spatial data mining, theclassification method applies nuclear field to depicting the distributioninformation of pulse samples in feature space, and digs out thehidden cluster information by analyzing distribution *** addition, a membership-degree criterion to quantify the correlationamong all classes is established, which ensures classificationaccuracy of signal samples. Numerical experiments show that thepresented method can effectively prevent different working statesof multi-mode emitter from being classified as several emitters,and achieve higher classification accuracy.

关键词： multi-mode radar signal classification data mining,nuclear field cloud model membership.

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