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Search Results: 1 - 10 of 38014 matches for " LIN Junda "
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Analysis of the Effect of Financial Subsidy on China’s New Energy Vehicle Industry R & D Activities  [PDF]
Junda Lin
Modern Economy (ME) , 2019, DOI: 10.4236/me.2019.101007

As a strategic emerging industry in China, new energy vehicles (NEV) industry has developed rapidly in recent years under the strong support of national industrial policies. In order to observe the effect of financial subsidies on R & D activities of NEV companies in China, this paper cuts through the perspective of R & D intensity of enterprises. According to the micro panel data of 75 listed companies in China’s NEV industry chain from 2008 to 2016, empirical analysis shows that the financial subsidy has a positive effect on the R & D intensity of the NEV industry chain enterprises, and the financial subsidies are more obvious for the new energy vehicle core component manufacturing industry when considering the sub-sectors. In addition, some other factors that may affect China’s NEV industry have also been discussed. This puts forward some empirical evidence and policy recommendations for the direction of the country’s further subsidy policy for the promotion of NEV industry innovation.

Invasion and Morphological Variation of the Non- Indigenous Barnacle Chthamalus challengeri(Hoek, 1883) in Yangshan Port and its Surrounding Areas Invasion and Morphological Variation of the Non- Indigenous Barnacle Chthamalus challengeri(Hoek, 1883) in Yangshan Port and its Surrounding Areas
LIU Yan,XUE Junzeng,LIN Junda,WU Huixian
- , 2015,
Abstract: Invasive species generally possess unique characteristics that allow them to survive the invasion process in order to establish and spread in new habitats. Successful invaders must resist both physical and physiological stresses associated with the changing environment. A common littoral barnacle, Chthamalus challengeri Hoek, 1883(Crustacea, Cirripedia), which is native to Japan, South Korea and northern China, has become established in the high-littoral zone adjacent to Yangshan Port, Shanghai, China. A comparison of the morphology of Chthamlus species from Zhoushan archipelago with previous description indicates the occurrence of C. challengeri. The new immigrant becomes a dominant species in certain high-intertidal habitats of the adjacent area to of Yangshan Port. C. challengeri was found in part of sampling sites in Zhoushan in 2010; however, it dispersed to all the eleven sampling sites in 2012. Densities of C.challengeri had increased over 10 times in the last 2 years, with the highest mean value reaching 39533 ± 6243 ind. m-2 in the new habitat. The specific ratios of both operculum area(Sa) to base area(SA) and average height of parietal plates(H) to length of base(L) revealed that C. challengeri displays morphological changes to resist stronger currents in the new habitats for invasion
Simultaneously Hermaphroditic Shrimp Use Lipophilic Cuticular Hydrocarbons as Contact Sex Pheromones
Dong Zhang,John A. Terschak,Maggy A. Harley,Junda Lin,J?rg D. Hardege
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0017720
Abstract: Successful mating is essentially a consequence of making the right choices at the correct time. Animals use specific strategies to gain information about a potential mate, which is then applied to decision-making processes. Amongst the many informative signals, odor cues such as sex pheromones play important ecological roles in coordinating mating behavior, enabling mate and kin recognition, qualifying mate choice, and preventing gene exchange among individuals from different populations and species. Despite overwhelming behavioral evidence, the chemical identity of most cues used in aquatic organisms remains unknown and their impact and omnipresence have not been fully recognized. In many crustaceans, including lobsters and shrimps, reproduction happens through a cascade of events ranging from initial attraction to formation of a mating pair eventually leading to mating. We examined the hypothesis that contact pheromones on the female body surface of the hermaphroditic shrimp Lysmata boggessi are of lipophilic nature, and resemble insect cuticular hydrocarbon contact cues. Via chemical analyses and behavioural assays, we show that newly molted euhermaphrodite-phase shrimp contain a bouquet of odor compounds. Of these, (Z)-9-octadecenamide is the key odor with hexadecanamide and methyl linoleate enhancing the bioactivity of the pheromone blend. Our results show that in aquatic systems lipophilic, cuticular hydrocarbon contact sex pheromones exist; this raises questions on how hydrocarbon contact signals evolved and how widespread these are in the marine environment.
Orbit configuration spaces of small covers and quasi-toric manifolds
Junda Chen,Zhi Lü,Jie Wu
Mathematics , 2011,
Abstract: In this article, we investigate the orbit configuration spaces of some equivariant closed manifolds over simple convex polytopes in toric topology, such as small covers, quasi-toric manifolds and (real) moment-angle manifolds; especially for the cases of small covers and quasi-toric manifolds. These kinds of orbit configuration spaces are all non-free and noncompact, but still built via simple convex polytopes. We obtain an explicit formula of Euler characteristic for orbit configuration spaces of small covers and quasi-toric manifolds in terms of the $h$-vector of a simple convex polytope. As a by-product of our method, we also obtain a formula of Euler characteristic for the classical configuration space, which generalizes the F\'elix-Thomas formula. In addition, we also study the homotopy type of such orbit configuration spaces. In particular, we determine an equivariant strong deformation retract of the orbit configuration space of 2 distinct orbit-points in a small cover or a quasi-toric manifold, which turns out that we are able to further study the algebraic topology of such an orbit configuration space by using the Mayer-Vietoris spectral sequence.
Study on vertical mixing law of continuous point source in nature river and its application

DU Yanliang,CHU Junda,

环境科学学报 , 2000,
Abstract: The mixing law of the continuous point source,in the nature flow,is studied.By the theoretical analysis,two equations are presented:one is the distance of the vertical homogeneous mixing,other is the part depth of homogeneous mixing.The equations are verified by the measured data,and the results are satisfied.Using above theory,the improved 2D numerical model is developed.The shortcoming of the original model in the near field,the calculated value lower than real value,is overcome.The prominent advantages are that the results are reliable, and the working time is decreased.
Gearbox Tooth Cut Fault Diagnostics Using Acoustic Emission and Vibration Sensors — A Comparative Study
Yongzhi Qu,David He,Jae Yoon,Brandon Van Hecke,Eric Bechhoefer,Junda Zhu
Sensors , 2014, DOI: 10.3390/s140101372
Abstract: In recent years, acoustic emission (AE) sensors and AE-based techniques have been developed and tested for gearbox fault diagnosis. In general, AE-based techniques require much higher sampling rates than vibration analysis-based techniques for gearbox fault diagnosis. Therefore, it is questionable whether an AE-based technique would give a better or at least the same performance as the vibration analysis-based techniques using the same sampling rate. To answer the question, this paper presents a comparative study for gearbox tooth damage level diagnostics using AE and vibration measurements, the first known attempt to compare the gearbox fault diagnostic performance of AE- and vibration analysis-based approaches using the same sampling rate. Partial tooth cut faults are seeded in a gearbox test rig and experimentally tested in a laboratory. Results have shown that the AE-based approach has the potential to differentiate gear tooth damage levels in comparison with the vibration-based approach. While vibration signals are easily affected by mechanical resonance, the AE signals show more stable performance.
Slick Packets
Giang T. K. Nguyen,Rachit Agarwal,Junda Liu,Matthew Caesar,P. Brighten Godfrey,Scott Shenker
Computer Science , 2012,
Abstract: Source-controlled routing has been proposed as a way to improve flexibility of future network architectures, as well as simplifying the data plane. However, if a packet specifies its path, this precludes fast local re-routing within the network. We propose SlickPackets, a novel solution that allows packets to slip around failures by specifying alternate paths in their headers, in the form of compactly-encoded directed acyclic graphs. We show that this can be accomplished with reasonably small packet headers for real network topologies, and results in responsiveness to failures that is competitive with past approaches that require much more state within the network. Our approach thus enables fast failure response while preserving the benefits of source-controlled routing.
Drug Target Prediction Based on the Herbs Components: The Study on the Multitargets Pharmacological Mechanism of Qishenkeli Acting on the Coronary Heart Disease
Yong Wang,Zhongyang Liu,Chun Li,Dong Li,Yulin Ouyang,Junda Yu,Shuzhen Guo,Fuchu He,Wei Wang
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/698531
Abstract: In this paper, we present a case study of Qishenkeli (QSKL) to research TCM’s underlying molecular mechanism, based on drug target prediction and analyses of TCM chemical components and following experimental validation. First, after determining the compositive compounds of QSKL, we use drugCIPHER-CS to predict their potential drug targets. These potential targets are significantly enriched with known cardiovascular disease-related drug targets. Then we find these potential drug targets are significantly enriched in the biological processes of neuroactive ligand-receptor interaction, aminoacyl-tRNA biosynthesis, calcium signaling pathway, glycine, serine and threonine metabolism, and renin-angiotensin system (RAAS), and so on. Then, animal model of coronary heart disease (CHD) induced by left anterior descending coronary artery ligation is applied to validate predicted pathway. RAAS pathway is selected as an example, and the results show that QSKL has effect on both rennin and angiotensin II receptor (AT1R), which eventually down regulates the angiotensin II (AngII). Bioinformatics combing with experiment verification can provide a credible and objective method to understand the complicated multitargets mechanism for Chinese herbal formula.
Cardioprotective Effects of Qishenyiqi Mediated by Angiotensin II Type 1 Receptor Blockade and Enhancing Angiotensin-Converting Enzyme 2
Yong Wang,Chun Li,Yulin Ouyang,Junda Yu,Shuzhen Guo,Zhongyang Liu,Dong Li,Jing Han,Wei Wang
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/978127
Abstract: The aim of this paper was to investigate whether the effects of QSYQ on CHD are associated with the renin-angiotensin-aldosterone system (RAAS). The formula groups were lavaged with QSYQ, using fosinopril sodium as a control. The level of RAAS components in the myocardial tissue was measured, respectively. The results showed that both QSYQ and fosinopril sodium can improve the ejection fraction in CHD and that QSYQ decreases the left ventricular end-systolic diameter and left ventricular end-diastolic diameter, while fosinopril sodium has no effects on these parameters. Fosinopril sodium, as an ACE inhibitor, downregulated ACE expression and eventually reduced the tissue AngII concentration but had no effect on ACE2. Moreover, it had no effect on renin or AT2, while QSYQ significantly decreased the level of renin and expression of AngII in myocardial tissue. The results also revealed that QSYQ can act on both AT1 and AT2, thus, blocking the effect of AngII and increasing the level of ACE2. It also downregulated the levels of TGF- and MMP-9, but it had no effect on ACE. This study showed that the ameliorative effects of QSYQ on CHD in rats had multiple targets associated with the inhibition of RAAS, thus, producing cardioprotective therapy effects.
Determining the Wall-broken Rate of Safflower Micropowder

Cai Guangxian,Li Y,Yang Yonghu,Yang Ying,Wen Junda,

世界科学技术-中医药现代化 , 2008,
Abstract: The study attempts to develop a method for determining the wall-broken rate of Safflower micropowder.In the study,a Cytometry is used to investigate the impact of ultra-pulverization on Safflower,and to determine the wall-bro- ken rate of Safflower micropowder.The regression analysis result shows that both the weight of Safflower powder and the number of complete cell are significantly correlated.The wall-broken Rate of Safflower Micropowder is 96.40%.It is concluded that the cell counting method is conveni...
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