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SD-splittings for Some Bordered 3-Manifolds

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Acta Mathematica Sinica,English Series 2006年第5期22卷 1481-1484页

作者： feng chun lei Yang LI Department of Mathematics Harbin Institute of Technology Harbin 150001 P. R. China

In the present paper, we characterize the bordered 3-manifolds with genus 1 D-splittings and SD-splittings. We also describe a minimal genus SD-splitting for a handlebody and surface × I.

关键词： handlebody SD-splitting genus of SD-splitting

Some Sufficient Conditions for Tunnel Numbers of Connected Sum of Two Knots Not to Go Down

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Acta Mathematica Sinica,English Series 2011年第11期27卷 2229-2244页

作者： Guo Qiu YANG feng chun lei School of Astronautics Harbin Institute of Technology Harbin 150001 P. R. China Department of Mathematics Harbin Institute of Technology Harbin 150001 P. R. China School of Mathematical Sciences Dalian University of Technology Dalian 116024 P. R. China

In this paper, we show the following result： Let Ki be a knot in a closed orientable 3- manifold Mi such that （Mi,Ki） is not homeomorphic to （S^2 × S^1,x0 × S^1）, i = 1,2. Suppose that the Euler Characteristic of any meridional essential surface in each knot complement E（Ki） is less than the difference of one and twice of the tunnel number of Ki. Then the tunnel number of their connected sum will not go down. If in addition that the distance of any minimal Heegaard splitting of each knot complement is strictly more than 2, then the tunnel number of their connected sum is super additive. We further show that if the distance of a Heegaard splitting of each knot complement is strictly bigger than twice the tunnel number of the knot （twice the sum of the tunnel number of the knot and one, respectively）, then the tunnel number of connected sum of two such knots is additive （super additive, respectively）.

关键词： Tunnel number Heegaard splitting Heegaard distance meridional surface

A Khovanov Type Link Homology with Geometric Interpretation

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Acta Mathematica Sinica,English Series 2016年第4期32卷 393-405页

作者： Mei Li ZHANG feng chun lei School of Mathematical Sciences Dalian University of Technology Department of Basis Dalian Naval Academy

We study a Khovanov type homology close to the original Khovanov homology theory from Frobenius *** homology is an invariant for oriented links up to isotopy by applying a tautological functor on the geometric *** homology has also geometric descriptions by introducing the genus generating *** prove that Jones Polynomial is equal to a suitable Euler characteristic of the homology *** an application,we compute the homology groups of（2,k）-torus knots for every k ∈ N.

关键词： Frobenius system TQFT Khovanov homology

A Lower Bound for the Heegaard Genera of Annulus Sum

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Journal of Mathematical Research and Exposition 2011年第4期31卷 578-586页

作者： feng Ling LI feng chun lei School of Mathematical Sciences Dalian University of Technology Liaoning 116024 P. R. China

Let Mi, i = 1,2, be a compact orientable 3-manifold, and Ai an incompressible annulus on a component Fi of OMi. Suppose A1 is separating on F1 and A2 is non-separating on F2. Let M be the annulus sum of M1 and M2 along A1 and A2. In the present paper, we give a lower bound for the genus of the annulus sum M in the condition of the Heegaard distances of the submanifolds M1 and M2

关键词： genus distance annulus.

Distance of Edges in the Curve Complex of a Surface

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Journal of Mathematical Research and Exposition 2011年第6期31卷 1092-1096页

作者： Xiu Ying SHI feng chun lei The College of Continuing Education Chifeng UniversityInner Mongolia 024000P.R.China School of Mathematical Sciences Dalian University of TechnologyLiaoning 116024P.R.China

Let S be a closed orientable surface of genus g ≥ 2,and C（S）the curve complex of *** the paper,we introduce the concepts of 2-path between edges in C（S）,which can be regarded as an analogue to the edge path betwe... 详细信息

关键词： curve complex distance of vertices 2-path between edges 2-diameter of C(S).

Spatially Resolved N2（A3Σ＋u, ν=0） Decay Studies in the Pulsed Direct-Current Nitrogen Discharge using the Laser-Induced-Fluorescence Technique

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Chinese Physics Letters 2014年第3期31卷 107-110页

作者： feng chun-lei YANG Hong-Liang GAO Liang DING Hong-bin School of Physics and Optoelectronic Engineering Key Laboratory of Materials Modification by Laser Ion and Electron Beams Dalian University of Technology Dalian 116024

We focus on the investigation of the spatial distribution and temporal evolution of N2（A3Σ＋u, ν=0） in a very early afterglow of a pulsed dc nitrogen discharge. The results indicate that a fast quenching process of N2（A3Σ＋u, ν=0） exists in the very early afterglow. We study the dependence of this fast quenching process on the discharge pressure 20–40 torr. It seems that this fast quenching behavior of N2（A3Σ＋u, ν=0） found in our experiment can be ascribed to the combined action of pooling reaction and collisions with N atoms through N2（A3Σ＋u）＋N2（A3Σ＋u）→ N2＊＋N2（N2＊=N2（B3Πg, C3Πu, C＇3Πu, C＂5Πu）） and N2（A3Σ＋u）＋N（4S）→N（2P）＋N2, respectively. Meanwhile, the decay studies of N2（A3Σ＋u, ν=0） near the anode and cathode infer that the production of N（4S） atoms does not distribute uniformly along the axis of the discharge gap at relatively low pressure, and this effect becomes gradually inconspicuous with the increasing discharge pressure.

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An Improved Maximum C/I Scheduling Algorithm Combined with HARQ

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The Journal of China Universities of Posts and Telecommunications 2003年第2期10卷 16-21页

作者： CUI chun feng, DU lei, JI Yang, ZHANG Ping (Wireless Technology Innovation Labs, Beijing University of Posts & Telecommunications, Beijing 100876, P.R. China) Wireless Technology Innovation Labs Beijing University of Posts & Telecommunications 北京 100876

It is well known that traffic in downlink will be much greater than that in uplink in 3 G and that beyond. High Speed Downlink Packet Access( HSDPA ) is the solution to transmission for high speed downlink packet service in UMTS , of which Maximum C/I scheduling is one of the important algorithms related to performance enhancement. An improved scheme, Thorough Maximum C/I scheduling algorithm, is presented in this article, in which every transmitted frame has the maximum C/I . The simulation results show that the new Maximum C/I scheme outperforms the conventional scheme in throughput performance and delay performance, and that the FER decreases faster as the maximum number of the retransmission increases.

关键词： Maximum C/I scheduling HSDPA HARQ restransmission

Ubiquitin-specific protease 1 facilitates tumor immune escape from natural killer cells and predicts the prognosis in small cell lung cancer

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Oncology Research 2025年第1期33卷 213-224页

作者： SHIQIN JIANG YIchun TANG feng MA YUchun NIU lei SUN Department of Clinical Pharmacy Shenzhen Hospital of Integrated Traditional Chinese and Western MedicineShenzhen518104China Department of Pathology Zhujiang HospitalSouthern Medical UniversityGuangzhou510280China Department of Radiation Oncology The First People’s Hospital of FoshanFoshan528000China Department of Oncology The First Affiliated Hospital of Jinan UniversityJinan UniversityGuangzhou510630China Department of Oncology The First Dongguan Affiliated HospitalGuangdong Medical UniversityDongguan523721China

Objective:Small cell lung cancer(SCLC)is commonly recognized as the most fatal lung cancer *** substantial advances in immune checkpoint blockade therapies for treating solid cancers,their benefits are limited to a minority of patients with *** the present study,novel indicators for predicting the outcomes and molecular targets for SCLC treatment were ***:We conducted bioinformatics analysis to identify the key genes associated with tumor-infiltrating lymphocytes in *** functional role of the key gene identified in SCLC was determined both in vitro and in ***:A significant correlation was observed between patient survival and CD56dim natural killer(NK)cell ***,we noted that the hub gene ubiquitin-specific protease 1(USP1)is closely correlated with both CD56dim NK cells and overall survival in *** analysis revealed that USP1 is upregulated in *** addition,gene set enrichment analysis revealed that USP1 overexpression hinders NK cell-mediated immune *** co-cultivating NK-92 cells with SCLC cells,we demonstrated that NK cell cytotoxicity against SCLC could be improved either via USP1 knock-down or pharmacological ***,using a nude-mice xenograft tumor model,we noted that USP1 inhibition effectively suppressed tumor proliferation and increased the expression of NK cell-associated ***:Our study findings highlight the importance of NK cells in regulating ***1 overexpression can inhibit NK cell-mediated immunity;therefore,USP1 may serve not only as a prognostic biomarker but also as a potential molecular target of SCLC therapy.

关键词： Ubiquitin-specific protease 1(USP1) Natural killer(NK)cell Small cell lung cancer(SCLC) Prognosis Immune escape

软土地区隔断墙控制基坑变形的作用机理及其效果研究

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岩土工程学报 2018年第11期40卷 2087-2095页

作者：冯春蕾张顶立房倩侯艳娟北京交通大学城市地下工程教育部重点实验室

以天津软土地区20个地铁车站基坑实测资料为背景,建立地铁车站基坑标准化模型,采用有限元与正交试验相结合的方法,重点研究隔断墙距同侧围护结构的水平距离L、隔断墙的刚度E及其入土深度H 3个主要设计参数对其控制围护结构内力、侧移以... 详细信息

以天津软土地区20个地铁车站基坑实测资料为背景,建立地铁车站基坑标准化模型,采用有限元与正交试验相结合的方法,重点研究隔断墙距同侧围护结构的水平距离L、隔断墙的刚度E及其入土深度H 3个主要设计参数对其控制围护结构内力、侧移以及坑外地表沉降的作用。结果表明：3个参数的变化对基坑的变形控制均有不同程度的影响,其中L主要影响围护结构内力及地表最大沉降,最大沉降可减小60%以上;H主要影响围护结构最大侧移,最大可以减小为未设置隔断墙时的50%左右;而E在常规变化范围内对基坑变形的影响相对较弱。其次,通过引入＂相似结构＂双排桩的计算理论,建立了L与隔断墙分担围护结构内力及土压力间的定量关系。最后利用Kung等基于可靠度理论提出的预测基坑变形的方法分析软土地区隔断墙的控制效果,同时与实测值和有限元计算结果进行对比,验证了上述结论的适用性。

关键词：基坑工程隔断墙正交试验变形控制机理土压力分配