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The first report of the genus Willenstenhelia (Copepoda:Harpacticoida:Miraciidae) from the China seas,with description of a new species

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Acta Oceanologica Sinica 2018年第10期37卷 195-201页

作者： ma lin LI Xinzheng Department of marine Organism Taxonomy and Phylogeny Institute of Oceanology Chinese Academy of Sciences Center for Ocean Mega-Science Chinese Academy of Sciences Graduate University University of Chinese Academy of Sciences Laboratory for marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology (Qingdao)

A new species Willenstenhelia mirabilipes sp. nov. （Copepoda： Harpacticoida： Miraciiidae） is described based on specimens collected from the South China Sea. This is also the first report of the genus Willenstenhelia from the China seas. The new species differs from congeners by the combined characters： all somites without spinules on surface except anal somite; third segment of female P4 exopod with two inner setae; female P5 baseoendopodal lobe with four elements and P5 exopod with sharp apical spine; caudal ramus about six times as long as broad.

关键词： Crustacea new species taxonomy

Radio map updated method based on subscriber locations in indoor WLAN localization

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Journal of Systems Engineering and Electronics 2015年第6期26卷 1202-1209页

作者： Ying Xia Zhongzhao Zhang lin ma School of Electronics and Information Engineering Harbin Institute of Technology School of Communication and Electronic Engineering Qiqihar University

With the rapid development of wireless local area network （WLAN） technology, an important target of indoor positioning systems is to improve the positioning accuracy while reducing the online calibration effort to overcome signal time-varying. A novel fingerprint positioning algorithm, known as the adaptive radio map with updated method based on hidden markov model （HMM）, is proposed. It is shown that by using a collection of user traces that can be cheaply obtained, the proposed algorithm can take advantage of these data to update the labeled calibration data to further improve the position estimation accuracy. This algorithm is a combination of machine learning, information gain theory and fingerprinting. By collecting data and testing the algorithm in a realistic indoor WLAN environment, the experiment results indicate that, compared with the widely used K nearest neighbor algorithm, the proposed algorithm can improve the positioning accuracy while greatly reduce the calibration effort.

关键词： subscriber location wireless local area network(WLAN) positioning accuracy calibration effort hidden markovmodel (HMM).

А Novel AP Placement Algorithm Based on User Distribution for Indoor WLAN System

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China Communications 2016年第10期13卷 108-118页

作者： ShuTang lin ma Yubin Xu Harbin Institute of Technology Communication Research Center Harbin China 150001 Key Laboratory of Police Wireless Digital Communication Ministry of Public Security Harbin China 150001

AP deployment is significant for indoor WLAN system to achieve seamless coverage. The available algorithms do not take user distribution into consideration so that poor user coverage and imbalanced network load occur. Therefore, this paper proposed a novel AP placement algorithm to bridge the AP deployment with user distribution. The proposed algorithm employs statistics theory to model the user distribution as its location and probability. Then we obtain the AP location based on the fuzzy C-clustering algorithm. The proposed algorithm is practical for implementation, which means the actual signal transmission isn't required in our proposed method. The simulation results show that the proposed algorithm could automatically achieve a good AP deployment with different user distribution, and provide a good performance in the maximum users and AP load balance in WLAN.

关键词： AP placement user distribution fuzzy C-clustering artificial fish maximum users AP load balance

Assessment of silver(Ⅰ) complexes of salicylaldehyde derivatives—histidine Schiff base as novel a-glucosidase inhibitors

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Chinese Chemical Letters 2016年第2期27卷 283-286页

作者： Jing-Wei Zheng lin ma School of Chemistry and Chemical Engineering Sun Yat-sen University

In this study,a novel class of histidine Schiff base silver（Ⅰ） complexes derived from salicylaldehyde,1a-9a,was found to be an effective inhibitor of α-*** results of this study showed that the newly synthesized complexes inhibited α-glucosidase through noncompetitive mechanisms;the IC50values were ranging from 0.00431 μmol L ~1 to 0.492 μmol L ~*** structure-activity relationship was established as *** results demonstrated that compound 7a,5-nitro salicylaldehyde Schiff base silver complex,is the most promising α-glucosidase inhibitor with the lowest IC50 value,which could be exploited as a drug candidate to alleviate postprandial hyperglycemia in the treatment of type II diabetes *** research provided a catalyst-free,simple,and environmentally benign reaction to synthesize compounds using mechanochemistry.

关键词： α-Glucosidase Histidine schiff base silver(Ⅰ) complexes Type Ⅱ diabetes mellitus

Toward a Multi-Layered Chiasme-Focused Topology: A Reading of Merleau-Ponty's Later Writings

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Frontiers of Philosophy in China 2020年第2期15卷 242-269页

作者： ma lin School of Philosophy Renmin University of ChinaBeijing 100872China

This paper traces the genealogy of reversibility,chiasma,and chiasme in Merleau-Ponty's writings and offers a new characterisation of his later ontology in terms of a multi-layered chiasme-focused topology informed by subtle differences and interconnections among these *** need to grasp the significance of reversibility not only in terms of constant recoil and impossible overlap but also of its situatedness in the crisscrossing between Dasein and things,and between the inside/invisible and the outside/visible."Chiasma" was initially introduced as a reference to the intersection of ***-Ponty deploys it to articulate macroscopic insights concerning the nature of philosophy and the interweaving connections between self,other,and the *** comparison,"reversibility" is primarily used to describe the microscopic bond between touching-touched and perceiving-perceived.I argue that,as Merleau-Ponty's ultimate choice of wording,"chiasme" incorporated the significance of both "reversibility" and "chiasma." A chiasme-focused topology that retains the significance of all three of the terms would serve to better convey the import of Merleau-Ponty's later ontology,which aims to dissolve and to re-configure our conceptions about being,body,self,and the other from within and from below.

关键词： Merleau-Ponty chiasma chiasme reversibility intertwining(entrelacs) ontology

Two-phase SPH simulation of vertical water entry of a two-dimensional structure

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Journal of Hydrodynamics 2018年第5期30卷 841-850页

作者： lin ma Xi Zhao Hua Liu Key Laboratory of Hydrodynamics（Ministry of Education） School of Naval ArchitectureOcean and civil EngineeringShanghai Jiao Tong UniversityShanghai200240 China State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai 200135China

In view of the fact that the SPH model is easy to handle the flows with the free surface of large deformation, a 2-D flow induced by vertical water entry of a 2-D structure is simulated using the two-phase SPH model. The local pressure of the boundary particles is obtained by pressure of the fluid particles nearby through a modified kernel approximation. To evaluate the accuracy of the method, water entry of a 2-D symmetric wedge with fixed separation point of the free surface on the wedge surface is simulated. The pressure distribution of the wedge at the initial stage agrees well with the analytical results available. Evolution of the free surface and the air flow in the cavity induced by the water entry are obtained. A higher speed air jet is found at the neck of the cavity when the neck of the cavity becomes smaller. For the case of a horizontal cylinder entering the water with an unknown separation point of flow on the model surface, the early stage of the water entry is simulated for the rigid body with different density. Evolution of the free surface deformation of the half-buoyant cylinder and neutrally buoyant cylinder water entry is compared with the experimental data. The effects of the density ratio and Froude number on the pinch-off of the cavity are discussed. It is found that the pinch-off time remains almost constant for different density ratio and Froude number. Meanwhile, for a given Froude number, the dimensionless pinch-off depth and the location of the cylinder at the time of pinch-off increase with the density ratio. Further, for a given density ratio, these two parameters increase with the Froude number and, however, the relative cavity shape appears to be a self-similar shape when Fr ≥8.35.

关键词： Smoothed particle hydrodynamics (SPH) two-phase water entry density ratio

Metal complexes of anthranilic acid derivatives: A new class of noncompetitive α-glucosidase inhibitors

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Chinese Chemical Letters 2016年第5期27卷 627-630页

作者： Jing-wei Zheng lin ma School of Chemistry and Chemical Engineering Sun Yat-Sen University Guangzhou 510275 China

Metal complexes of anthranilic acid derivatives that constitute a novel class of non-sugar-type α- glucosidase inhibitors were synthesized and assessed in vitro for inhibitory activity. All of the AgO） complexes （9-16） inhibited α-glucosidase at the nanomolar scale, while 3,5-dichloroanthranilic acid silver（1）（9） was the most potent （ICso = 3.21 nmol/L）. Analysis of the kinetics of enzyme inhibition indicated that the mechanism of the newly prepared silver complexes was noncompetitive. The structure-activity relationships were also analyzed, and thev are discussed in this report.

关键词： α-Glucosidase Anthranilic acid derivatives Metal complexes Noncompetitive inhibitors

Two-dimensional Wave Equations with Fractal Boundaries

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Acta mathematica Sinica,English Series 2013年第12期29卷 2321-2342页

作者： lin Tao ma Wei Yi SU Department of mathematics Nanjing University College of mathematical Sciences Guangxi Normal University

This paper focuses on two cases of two-dimensional wave equations with fractal boundaries. The first case is the equation with classical derivative. The formal solution is obtained. And a definition of the solution is given. Then we prove that under certain conditions, the solution is a kind of fractal function, which is continuous, differentiable nowhere in its domain. Next, for specific given initial position and 3 different initial velocities, the graphs of solutions are sketched. By computing the box dimensions of boundaries of cross-sections for solution surfaces, we evaluate the range of box dimension of the vibrating membrane. The second case is the equation with p-type derivative. The corresponding solution is shown and numerical example is given.

关键词： Von Koch type curve p-type derivative two-dimensional wave equation fractal boundary fractal dimension

A new species of the genus Haloschizopera Lang, 1944(Copepoda, Harpacticoida, Miraciidae, Diosaccinae) from the East China Sea

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Journal of Oceanology and Limnology 2019年第5期37卷 1698-1707页

作者： LIU Qinghe ma lin LI Xinzheng Institute of Oceanology Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Laboratory for marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology (Qingdao)Qingdao 266237China

A new species belonging to the genus Haloschizopera Lang, 1944 (Copepoda, Harpacticoida, Miraciidae, Diosaccinae) was identifi ed based on the samples collected from the East China Sea, near the off shore of Zhejiang Province, East China. The new species is closely related to H . pygmaea Norman & Sccot T., 1905 and shares a combination of the following features: A1 eight-segmented;A2 exp-2 with one distal seta, exp-3 with three setae;P1 endopodal segments subequal, enp-1 not exceeding exp-2;exp-3 of P3 with one inner seta, of P4 with two inner setae. The new species is characterized by the presence of one inner seta on P2 exp-3 of both sexes. It can also be distinguished from its congeners by the characters of female: P5 exopod subcircular, endopodal lobe extending beyond half-length of exopod;genital doublesomite ornamented with three dorsolateral rows of spinules on anterior part.

关键词： meiobenthos new species taxonomy species group