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807 results on '"Tan, Qiang"'

1. Review of sublobar resection for lung adenocarcinoma with ground-glass presence

Author

ZHU Mingyang, XU Yuanyuan, REN Jianghao, HUANG Jiazheng, LI Ruonan, and TAN Qiang

Subjects
non-small cell lung cancer, lung adenocarcinoma, pulmonary ground-glass nodule, sublobar resection, Medicine
Abstract

Surgery is the mainstay of lung cancer treatment options. Traditionally, lobectomy has held its place as the gold standard for treating localized lung cancer, while sublobar resection, including wedge resection and segmentectomy, was primarily considered as an alternative, often reserved for patient ineligible to sustain a radical intervention. However, with the widespread application of computed tomography (CT) to clinical practice, the increasing detection rate of pulmonary ground glass nodules (GGNs) has reshaped this landscape. Ground glass opacity (GGO) in persistent lung nodules is an indicative factor of a favorable prognosis, typically corresponding to pathological changes such as atypical adenomatous hyperplasia (AAH), adenocarcinoma in situ (AIS), or adenocarcinomas predominantly featuring a lepidic growth pattern. A large number of retrospective studies have shown that sublobar resection can achieve satisfactory therapeutic outcomes for such lesions. A series of prospective studies from Japan have confirmed that for early-stage lung cancers dominated by GGOs, sublobar resection is also a viable curative surgical option. The follow-up data showed that there was no statistical difference in the survival status of these patients compared with that of pulmonary lobectomy. This article aims to delve into the role of limited lung resection in the context of lung adenocarcinoma presenting with GGO features.

Published
2024
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2. $L^{2}$-Hodge theory on complete almost K\'{a}hler manifold and its application

Author

Huang, Teng and Tan, Qiang

Subjects
Mathematics - Differential Geometry
Abstract

Let $(X,J,\omega)$ be a complete $2n$-dimensional almost K\"{a}hler manifold. First part of this article, we construct some identities of various Laplacians, generalized Hodge and Serre dualities, a generalized hard Lefschetz duality, and a Lefschetz decomposition, all on the space of $\ker{\Delta_{\partial}}\cap\ker{\Delta_{\bar{\partial}}}$ on pure bidegree. In the second part, as some applications of those identities, we establish some vanishing theorems on the spaces of $L^{2}$-harmonic $(p,q)$-forms on $X$ under some growth assumptions on the K\"{a}her form $\omega$. We also give some $L^{2}$-estimates to sharpen the vanishing theorems in two specific cases. At last of the article, as an application, we study the topology of the compact almost K\"{a}hler manifold with negative sectional curvature., Comment: 30 pages, Submitted. The main theorems remain unchanged. We remove the section about Theorem 1.7

Published
2023

18. Remarks on some compact symplectic solvmanifolds

Author

Tan, Qiang and Tomassini, Adriano

Subjects
Mathematics - Differential Geometry
Abstract

We study the hard Lefschetz property on compact symplectic solvmanifolds, i.e., compact quotients $M=\Gamma\backslash G$ of a simply-connected solvable Lie group $G$ by a lattice $\Gamma$, admitting a symplectic structure.

Published
2020

19. $L^{2}$-hard Lefschetz complete symplectic manifolds

Author

Huang, Teng and Tan, Qiang

Subjects
Mathematics - Differential Geometry
Abstract

For a complete symplectic manifold $M^{2n}$, we define the $L^{2}$-hard Lefschetz property on $M^{2n}$. We also prove that the complete symplectic manifold $M^{2n}$ satisfies $L^{2}$-hard Lefschetz property if and only if every class of $L^{2}$-harmonic forms contains a $L^{2}$ symplectic harmonic form. As an application, we get if $M^{2n}$ is a closed symplectic parabolic manifold which satisfies the hard Lefschetz property, then its Euler characteristic satisfies the inequality $(-1)^{n}\chi(M^{2n})\geq0$., Comment: Published in Ann. Mat. Pura Appl

Published
2020
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22. Vanishing theorems on complete Riemannian manifold with a parallel $1$-form

Author

Huang, Teng and Tan, Qiang

Subjects
Mathematics - Differential Geometry
Abstract

In this article, we first consider the $L^{2}$ \textit{Morse-Novikov cohomology} on a complete Riemannian manifold $M$ equipped with a parallel $1$-form which includes Vaisman manifold. Based on a vanishing theorem of $L^{2}$ \textit{Morse-Novikov cohomology}, we prove that the $L^{2}$-harmonic forms on $M$ are identically zero., Comment: 13 pages; to appear in Mathematische Nachrichten

Published
2019

34. On tamed almost complex four manifolds

Author

Tan, Qiang, Wang, Hongyu, Zhou, Jiuru, and Zhu, Peng

Subjects
Mathematics - Differential Geometry
Abstract

This paper proves that on any tamed closed almost complex four-manifold $(M,J)$ whose dimension of $J$-anti-invariant cohomology is equal to the self-dual second Betti number minus one, there exists a new symplectic form compatible with the given almost complex structure $J$. In particular, if the self-dual second Betti number is one, we give an affirmative answer to a question of Donaldson for tamed closed almost complex four-manifolds. Our approach is along the lines used by Buchdahl to give a unified proof of the Kodaira conjecture.

Published
2017

38. Homologous recombination deficiency (HRD) can predict the therapeutic outcomes of immuno-neoadjuvant therapy in NSCLC patients

Author

Zhou, Zhen, Ding, Zhengping, Yuan, Jie, Shen, Shengping, Jian, Hong, Tan, Qiang, Yang, Yunhai, Chen, Zhiwei, Luo, Qingquan, Cheng, Xinghua, Yu, Yongfeng, Niu, Xiaomin, Qian, Liqiang, Chen, Xiaoke, Gu, Linping, Liu, Ruijun, Ma, Shenglin, Huang, Jia, Chen, Tianxiang, Li, Ziming, Ji, Wenxiang, Song, Liwei, Shen, Lan, Jiang, Long, Yu, Zicheng, Zhang, Chao, Tai, Zaixian, Wang, Changxi, Chen, Rongrong, Carbone, David P., Xia, Xuefeng, and Lu, Shun

Published
2022
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42. Three‐Dimensional Conductive Interface and Tip Structure of MnO2 Electrode Facilitate Superior Zinc Ion Batteries.

Author

Zhou, Xingchen, Chen, Shengjie, Zhang, Yanhua, Yu, Baozhu, Chen, Yuanzhen, Liu, Yongning, Li, Sai, Liu, Liting, Jin, Hui, Deng, Junkai, and Tan, Qiang

Subjects
CARBON fibers, FINITE element method, ZINC ions, MANGANESE dioxide, STRUCTURAL frames
Abstract

Manganese dioxide has been significantly utilized in zinc ion batteries (ZIBs). However, in the rechargeable battery system, the manganese dioxide cathode suffers from poor conductivity, volume expansion, and substance dissolution, resulting in low capacity and poor stability. Herein, a 3D frame structure MnO2@CNTs cathode is proposed. In this system, the electrodeposited spherical MnO2 is anchored and interlinked via the in‐situ growth carbon nanotubes (CNTs) onto the carbon cloth. Benefiting the unique 3D frame structure, the MnO2 structure crush problem and the pathway of the electrons and ions are dramatically improved. The optimized MnO2@CNTs cathode demonstrate a high capacity of 256.35 mAh g−1 at 0.1 A g−1 and exceptional cycling stability. Furthermore, in‐situ Raman spectroscopy elucidates the energy storage mechanism of aqueous ZIBs (AZIBs). Moreover, COMSOL finite elements analysis demonstrates that the petal edge‐rich nanostructures of MnO2@CNTs generate a localized high electric field under constant current, accelerating ion/electron transfer. This work explains the rationale for CNTs to improve the properties of MnO2 cathodes, providing a new perspective for the design of high‐performance batteries. [ABSTRACT FROM AUTHOR]

Published
2024
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43. Borehole Condition and Limit Pressure Differential Analysis in Carbonate Reservoirs.

Author

Wang, Long, Su, Peng, Tan, Qiang, Li, Ke, and Hu, Naikun

Subjects
CARBONATE reservoirs, STRESS concentration, INDUSTRIAL capacity, STABILITY criterion, CARBONATE minerals, CARBONATES
Abstract

In deep carbonate reservoirs, testing and production with open-hole completion can help release the maximum production capacity. However, because the reservoir is subjected to high in situ stress, if the test pressure differential is too large, the wellbore collapse and instability will occur easily, causing downhole accidents. Therefore, it is necessary to determine the state of the borehole during the open-hole test in the carbonate reservoir and analyze the ultimate test pressure differential accordingly to ensure test safety. Considering the characteristics of open-hole completion, based on the mechanical properties of the carbonate reservoir and the stress distribution around the borehole during testing, a calculation method of the elastic zone, plastic zone, and residual failure zone around the open-hole wellbore was proposed. Regarding actual engineering data, a criterion for the overall stability of the open-hole section had been established from three aspects: the volume ratio of the plastic zone; the failure zone around the wellbore; and the failure angle on the borehole wall. According to this criterion, it is possible to determine the ultimate pressure differential during the open-hole test process and provide theoretical support for designing the open-hole completion test and production parameters for deep carbonate reservoirs. [ABSTRACT FROM AUTHOR]

Published
2024
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