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Volatiles from Sophora japonica flowers attract Harmonia axyridis adults(Coleoptera: Coccinellidae)

Journal of Integrative Agriculture 2019年第4期18卷 873-883页

作者： XIU chun-li XU Bin pan Hong-sheng ZHANG wei YANG Yi-zhong LU Yan-hui State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences College of Horticulture and Plant Protection Yangzhou University Lixiahe Regional Institute of Agricultural Sciences of Jiangsu Institute of Plant Protection Xinjiang Academy of Agricultural Sciences

The multicolored Asian lady beetle, Harmonia axyridis(Coleoptera: Coccinellidae), is a common generalist predator in China and is occasionally found gathering on the Chinese pagoda tree, Sophora japonica, in summer. In a field investigation, we found that H. axyridis adults preferred S. japonica during its flowering period even though their optimal prey(aphid) is absent at this time. In addition, male and female adults were attracted to S. japonica flowers to a similar extent in a Y-tube olfactometer assay. Using coupled gas chromatography-electroantennogram detection(GC-EAD), we identified a flower odor component(nonanal) that elicited a significant electrophysiological response in H. axyridis. Electroantennogram(EAG) dose-dependent responses revealed that the amplitude of the adult beetle's EAG response increased with increasing concentration of nonanal, peaking at 10 mg mL^(–1). In Y-tube olfactometer behavioral tests, H. axyridis adults preferred a 10 mg mL^(–1) nonanal source over a 100 mg mL^(–1) diluent. Under field conditions, the adults were significantly attracted to both concentrations(10 and 100 mg mL^(–1)), and high concentrations generally had greater attraction. All these results suggest that nonanal, a volatile compound of S. japonica flowers, greatly attracts H. axyridis adults. This study provides a basis for the development of synthetic attractants of H. axyridis, with the potential to promote biocontrol services of this generalist predator in the native area(e.g., China) and to suppress its population by mass trapping in its invasive areas.

关键词： flower preference plant volatile electrophysiological response behavioral response attractants

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Thermal-hydraulic performance analysis and multi-objective optimization of a microchannel with staggered semi-elliptical ribs

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Science China(Technological Sciences) 2024年第10期67卷 3152-3167页

作者： CUI pan LIU wei LIU Zhichun School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan 430074China

To enhance the cooling capacity of traditional microchannels for high heat flux electronic devices,a microchannel design with staggered semi-elliptical ribs is proposed in this *** numerical simulations,the flow characteristics of the designed microchannel are compared with those of a smooth one,and the effects of rib width(W_(r)),rib height(H_(r)),and rib length(L_(r)),on the thermal-hydraulic performance are investigated under laminar flow *** results show that the periodically arranged ribs induce periodic vortices within the microchannel,effectively promoting fluid mixing and enhancing heat transfer.W_(r) and H_(r) have similar effects on microchannel performance,with an increase in them leading to an enhanced thermal performance at the expense of deteriorated hydraulic ***,L_(r) has a comparatively weaker influence,with both the heat transfer and flow resistance initially growing with increasing L_(r) and then *** strike a balance between the two performances,a multi-objective optimization on the three geometrical parameters is conducted at a Reynolds number(Re)of *** with simulation data,artificial neural networks are trained as surrogate models,and a multi-objective genetic algorithm is employed to derive the Pareto *** the TOPSIS decision-making method,an optimal compromise solution is determined as W_(r)=0.2415 mm,H_(r)=0.0976 mm,and L_(r)=0.6486 *** testing on the optimized microchannel reveals that it exhibits high heat transfer,middle flow resistance,and excellent overall performance,with the performance evaluation criterion(PEC)falling between 1.572 and 1.723 within the Re range of 220–660.

关键词： heat transfer enhancement microchannel semi-elliptical rib numerical simulation multi-objective optimization

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Dynamics of a prey-predator system under Poisson white noise excitation

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Acta Mechanica Sinica 2014年第5期30卷 739-745页

作者： Shan-Shan pan wei-Qiu Zhu Department of Mechanics State Key Lab of Fluid Power Transmission and ControlZhejiang University

The classical Lotka-Volterra （LV） model is a well-known mathematical model for prey-predator ecosystems. In the present paper, the pulse-type version of stochastic LV model, in which the effect of a random natural environment has been modeled as Poisson white noise, is in- vestigated by using the stochastic averaging method. The averaged generalized It6 stochastic differential equation and Fokkerlanck-Kolmogorov （FPK） equation are derived for prey-predator ecosystem driven by Poisson white noise. Approximate stationary solution for the averaged generalized FPK equation is obtained by using the perturbation method. The effect of prey self-competition parameter e2s on ecosystem behavior is evaluated. The analytical result is confirmed by corresponding Monte Carlo （MC） simulation.

关键词： Prey-predator ecosystem Poisson white noise Stochastic averaging- Approximate stationary solution. Per turbation method

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Sparse Signal Recovery via Exponential Metric Approximation

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Tsinghua Science and Technology 2017年第1期22卷 104-111页

作者： Jian pan Jun Tang wei Zhu Department of Electronic Engineering Tsinghua University Beijing 100084China

Sparse signal recovery problems are common in parameter estimation, image processing, pattern recognition, and so on. The problem of recovering a sparse signal representation from a signal dictionary might be classified as a linear constraint l_0-quasinorm minimization problem, which is thought to be a Non-deterministic Polynomial-time（NP）-hard problem. Although several approximation methods have been developed to solve this problem via convex relaxation, researchers find the nonconvex methods to be more efficient in solving sparse recovery problems than convex methods. In this paper a nonconvex Exponential Metric Approximation（EMA）method is proposed to solve the sparse signal recovery problem. Our proposed EMA method aims to minimize a nonconvex negative exponential metric function to attain the sparse approximation and, with proper transformation,solve the problem via Difference Convex（DC） programming. Numerical simulations show that exponential metric function approximation yields better sparse recovery performance than other methods, and our proposed EMA-DC method is an efficient way to recover the sparse signals that are buried in noise.

关键词： sparse recovery exponential metric approximation sparsity tolerance DC optimization signal-to-noiseratio

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Real-time OHT Dispatching Mechanism for the Interbay Automated Material Handling System with Shortcuts and Bypasses

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Chinese Journal of Mechanical Engineering 2017年第3期30卷 663-675页

作者： Cong pan Jie ZHANG wei QIN school of mechanical engineering shanghai jiao tong universityShanghai 200240China

As a key to improve the performance of the interbay automated material handling system （AMHS） in 300 mm semiconductor wafer fabrication system, the real- time overhead hoist transport （OHT） dispatching problem has received much attention. This problem is first formu- lated as a special form of assignment problem and it is proved that more than one solution will be obtained by Hungarian algorithm simultaneously. Through proposing and strictly proving two propositions related to the char- acteristics of these solutions, a modified Hungarian algo- rithm is designed to distinguish these solutions. Finally, a new real-time OHT dispatching method is carefully designed by implementing the solution obtained by the modified Hungarian algorithm. The experimental results of discrete event simulations show that, compared with con- ventional Hungarian algorithm dispatching method, the proposed dispatching method that chooses the solution with the maximum variance respectively reduces on average 4 s of the average waiting time and average lead time of wafer lots, and its performance is rather stable in multiple dif- ferent scenarios of the interbay AMHS with different quantities of shortcuts. This research provides an efficient real-time OHT dispatching mechanism for the interbay AMHS with shortcuts and bypasses.

关键词： Interbay automated material handling system(AMHS) ~ Shortcuts and bypasses - Dispatching ~Hungarian algorithm ~ Wafer fabrication

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One novel multidimensional organic-inorganic hybrid based on polyoxometalates and copper chlorine coordination polymers with 4,4'-bipyridine ligands

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Chinese Chemical Letters 2012年第7期23卷 859-862页

作者： Li chun Xuan Qing Jiang pan School of Chemistry and Materials Science Heilongjiang UniversityHarbin 150080China

One novel organic-inorganic hybrid materials with 4,4＇-bipy ligands and copper chlorine coordination polymers as linkers,with new topology,{[Cu^I（4,4＇-bipy）]_（10）Cl_2（SiW_（12）O_（40））_2}·6H_2O（1）（4,4＇-bipy = 4,4＇-bipyridine）,has been hydrothermally synthesized. The single crystal X-ray structural analysis reveals that the structure of 1 is constructed from classical Keggin anions and[Cu^I（4,4＇- bipy）]cations into a novel,three-dimensional（3D） polyoxometalates（POMs）based *** the topological view,compound 1 is a novel（3.4^4.5^2.6^3）（3^2.4^4.5^6.6^9） *** electrochemical and photocatalysis properties of 1 have been investigated in details.

关键词： Polyoxometalate Tungstoferrate Framework Novel topology

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Acute liver failure in Chinese children:a multicenter investigation

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Hepatobiliary & pancreatic Diseases International 2014年第3期13卷 276-280页

作者： pan Zhao chun-Ya Wang wei-wei Liu Xi Wang Li-Ming Yu Yan-Rong Sun Liver Failure Therapy and Research Center Beijing 302 Hospital (PLA 302 Hospital) Emergency Department Beijing Anzhen Hospital Capital Medical University Intensive Care Unit Emergency Department General Hospital of PLA Postgraduate Division Academy of Military Medical Science Medical Administration Department Changhai Hospital Second Military Medical University Medical Administration Department General Hospital of Jinan Military Region Medical Administration Department General Hospital of Lanzhou Military Region

BACKGROUND: Currently, no documentation is available regarding Chinese children with acute liver failure(ALF). This study was undertaken to investigate etiologies and outcomes of Chinese children with ***: We retrospectively enrolled 32 pediatric patients with ALF admitted in five hospitals in different areas of China from January 2007 to December 2012. The coagulation indices, serum creatinine, serum lactate dehydrogenase,blood ammonia and prothrombin activity were analyzed; the relationship between these indices and mortality was evaluated by multivariate ***: The most common causes of Chinese children with ALF were indeterminate etiology(15/32), drug toxicity(8/32),and acute cytomegalovirus hepatitis(6/32). Only 1 patient(3.13%)received liver transplantation and the spontaneous mortality of Chinese children with ALF was 58.06%(18/31). Patients who eventually died had higher baseline levels of international normalized ratio(P=0.01), serum creatinine(P=0.04), serum lactate dehydrogenase(P=0.01), blood ammonia(P<0.01) and lower prothrombin activity(P=0.01) than those who *** analysis showed that the entry blood ammonia was the only independent factor significantly associated with mortality(odds ratio=1.069, 95% confidence interval 1.023-1.117,P<0.01) and it had a sensitivity of 94.74%, a specificity of 84.62%and an accuracy of 90.63% for predicting the death. Based on the established model, with an increase of blood ammonia level,the risk of mortality would increase by 6.9%.CONCLUSIONS: The indeterminate causes predominated in the etiologies of ALF in Chinese children. The spontaneous mortality of pediatric patients with ALF was high, whereas the proportion of patients undergoing liver transplantation was significantly low. Entry blood ammonia was a reliable predictor for the death of pediatric patients with ALF.

关键词： acute liver failure children etiology mortality prognosis

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Construction of high-performance magnetic sensor based on anisotropic magnetoresistance Ta/MgO/NiFe/MgO/Ta film

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Rare Metals 2021年第8期40卷 2026-2032页

作者： Yue-Dou pan Ling-Ran Yu Lei Wang Tao Chen Xin-Ya wei Rong-Gui Zhu Jian-wei Li chun Feng Guang-Hua Yu School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing100083China School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China School of Chemical Engineering and Technology Tianjin UniversityTianjin300072China

The anisotropic magnetoresistance film is an important core material for developing the magnetic ***,Ta(5)/Mg O(3)/Ni Fe(10)/Mg O(3)/Ta(3)multilayers(in nanometer)were prepared by magnetron sputtering and further applied to construct a sensor element by combining with the Wheatstone *** 1/f noise of the sensor element was greatly reduced by three orders of magnitude after annealing at 400℃for 7200 s,which was mainly due to the significant microstructural changes during the ***,when the sensor element was applied to detect the magnetic signal of a magnetic code disk with 512 N-S magnetic poles,the output voltage signal of the sensor displayed a large fluctuation of±0.05 *** order to reduce the voltage fluctuation,a magnetic sensor chip by using a parallelly arranged multipath Wheatstone bridges and auto-gain compensation structure was designed,and magnetic sensor elements and the high-performance computing drive module were *** output voltage fluctuation of the magnetic sensor was reduced by about 90%and approached to±0.005 *** findings provide an important basis for the practical application of Ni Fe-based magnetic sensing film materials.

关键词： Magnetic sensor Anisotropic magnetoresistance Permalloy Multi-channel spatially parallel Wheatstone bridge Auto-gain compensation

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A Novel Trustworthiness Measurement Model Based on weight and User Feedback

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Chinese Journal of Electronics 2022年第4期31卷 612-625页

作者： ZHOU wei MA Yanfang pan Haiyu School of Computer Science and Technology Huaibei Normal University School of Computer Science and Information Engineering Changzhou Institute of Technology School of Computer Science and Information Security Guilin University of Electronic Technology

Software trustworthiness is an essential criterion for evaluating software quality. In componentbased software, different components play different roles and different users give different grades of trustworthiness after using the software. The two elements will both affect the trustworthiness of software. When the software quality is evaluated comprehensively, it is necessary to consider the weight of component and user feedback. According to different construction of components, the different trustworthiness measurement models are established based on the weight of components and user feedback. Algorithms of these trustworthiness measurement models are designed in order to obtain the corresponding trustworthiness measurement value automatically. The feasibility of these trustworthiness measurement models is demonstrated by a train ticket purchase system.

关键词： Component-based software Trustworthiness weight User feedback Measurement

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Rapid progressive vaccine-induced immune thrombotic thrombocytopenia with cerebral venous thrombosis after ChAdOx1 nCoV-19(AZD1222)vaccination:A case report

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World Journal of Clinical Cases 2022年第26期10卷 9462-9469页

作者： Shin-Kuang Jiang wei-Liang Chen chun Chien Chi-Syuan pan Sheng-Ta Tsai Department of Neurology China Medical University HospitalTaichung 404332Taiwan Department of Radiology China Medical University HospitalTaichung 404332Taiwan Department of Neurology China Medical University Hsinchu HospitalHsinchu 30272Taiwan Department of Emergency China Medical University HospitalTaichung 404332Taiwan Neuroscience and Brain Disease Center China Medical UniversityTaichung 404332Taiwan

BACKGROUND Vaccine-induced immune thrombotic thrombocytopenia(VITT)is a rare and potentially life-threatening condition after receiving coronavirus disease *** is characterized by symptom onset at 5 to 30 d postvaccination,thrombocytopenia,thrombosis,high D-dimer level,and antiplatelet factor 4(anti-PF4)antibody *** can progress very fast,requiring urgent *** few studies have described its detailed clinical course and imaging *** report a typical VITT case in a patient who underwent regular repeated brain imaging *** SUMMARY A young woman presented with headaches at 7 d after the ChAdOx1 nCoV-19vaccine(AZD1222)*** then showed progressive symptoms of left upper limb *** computed tomography revealed venous infarction at the right parietal lobe with a hyperacute thrombus in the cortical *** hours later,brain magnetic resonance imaging revealed hemorrhage at the same *** resonance venography showed an irregular contour of the right transverse *** examination revealed a high D-dimer level,thrombocytopenia,and a high titer for anti-PF4 *** was treated with anticoagulants,intravenous immunoglobulin,and steroids and analgesic agents were administered for pain *** had a marked improvement on headaches and clumsiness after treatment along with radiological thrombus *** follow-up at the outpatient department,her modified Rankin scale at 90 d was *** Clinicians should be alerted whenever patients present with persistent and progressive headaches or focal motor/sensory deficits postvaccination.

关键词： Vaccine-induced immune thrombotic thrombocytopenia Intracranial Sinus Thrombosis ChAdOx1 nCoV-19 vaccine(AZD1222) Headache Serial brain image Case report

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