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Indecomposable Calabi-Yau Objects in Stable Module Categories of Finite Type

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Chinese Annals of Mathematics,Series B 2011年第5期32卷 793-802页

作者： Xiaolan YU jiwei he Department of Mathematics Zhejiang University Hangzhou 310027 China Department of Mathematics Shaoxing College of Arts and Science Shaoxing 312000 Zhejiang China

The authors give a discription of the finite representation type over an algebraically stable categories of selfinjective algebras of closed field, which admits indecomposable Calabi-Yau obdjects. For selfinjective algebras with such properties, the ones whose stable categories are not Calabi-Yau are determined. For the remaining ones, i.e., those selfinjective algebras whose stable categories are actually Calabi-Yau, the difference between the Calabi-Yau dimensions of the indecomposable Calabi-Yau objects and the Calabi-Yau dimensions of the stable categories is described.

关键词： Selfinjective algebra Stable category Calabi-Yau category Indecomposable Calabi-Yau object

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连通分次Frobenius代数的自同构群

杭州师范大学学报（自然科学版） 2024年第4期23卷 432-438页

作者：傅靓何济位杭州师范大学数学学院浙江杭州311121

文章主要研究了长度为2的连通分次Frobenius代数.得出了3个生成元且长度为2的连通分次Frobenius代数在同构意义下的分类,给出了长度为2的分次代数的自同构群.

关键词： Frobenius代数分次代数自同构群

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Koszul differential graded modules

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Science China Mathematics 2009年第9期52卷 2027-2035页

作者： he jiwei WU QuanShui Department of Mathematics Shaoxing College of Arts and SciencesShaoxing 312000China School of Mathematical Sciences Fudan UniversityShanghai 200433China

The concept of Koszulity for differential graded (DG, for short) modules is introduced. It is shown that any bounded below DG module with bounded Ext-group to the trivial module over a Koszul DG algebra has a Koszul DG submodule (up to a shift and truncation), moreover such a DG module can be approximated by Koszul DG modules (Theorem 3.6). Let A be a Koszul DG algebra, and Dc(A) be the full triangulated subcategory of the derived category of DG A-modules generated by the object AA. If the trivial DG module kA lies in Dc(A), then the heart of the standard t-structure on Dc(A) is anti-equivalent to the category of finitely generated modules over some finite dimensional algebra. As a corollary, Dc(A) is equivalent to the bounded derived category of its heart as triangulated categories.

关键词： Koszul DG module derived category heart of t-structure 16E05 16E40 16W50

市售发酵食品中乳酸菌的耐药性评估及传播风险研究

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食品与生物技术学报 2024年第6期43卷 21-30页

作者：李宇行何继玮钱敏韩剑众曲道峰浙江工商大学食品与生物工程学院浙江杭州310018

为评估发酵食品中乳酸菌的耐药性及其传播风险,作者对市售酸奶和泡菜中的乳酸菌进行分离鉴定。以纸片扩散法鉴定其耐药表型,分析多重耐药情况,PCR鉴定其耐药基因型。从40份样品中共分离得到包括9种不同种属在内的62株乳酸菌,其中酸奶源... 详细信息

为评估发酵食品中乳酸菌的耐药性及其传播风险,作者对市售酸奶和泡菜中的乳酸菌进行分离鉴定。以纸片扩散法鉴定其耐药表型,分析多重耐药情况,PCR鉴定其耐药基因型。从40份样品中共分离得到包括9种不同种属在内的62株乳酸菌,其中酸奶源乳酸菌均为多重耐药菌,对卡那霉素等5种抗生素的耐药率均高于泡菜源菌株,而泡菜源乳酸菌对庆大霉素和链霉素的耐药率均在40%以上。耐药基因型鉴定结果表明,tetM的检出率最高,为16.12%,酸奶样品分离株中有5种基因的检出率高于泡菜样品。2株酸奶源菌株中四环素耐药基因tetM可通过质粒接合作用转移到受体菌EC600中。作者对市售发酵食品乳酸菌进行了耐药性评估与传播风险研究,为保障发酵食品安全提供理论依据。

关键词：乳酸菌耐药性发酵食品传播风险

Koszul Differential Graded Algebras and BGG Correspondence II

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Chinese Annals of Mathematics,Series B 2010年第1期31卷 133-144页

作者： jiwei he Quanshui WU Department of Mathematics Shaoxing College of Arts and Sciences Shaoxing 312000 Zhejiang China School of Mathematical Sciences Fudan University Shanghai 200433 China

The concept of Koszul differential graded (DG for short) algebra is introduced in [8].Let A be a Koszul DG *** the Ext-algebra of A is finite-dimensional,i.e.,the trivial module A k is a compact object in the derived category of DG A-modules,then it is shown in [8] that A has many nice ***,if the Ext-algebra is infinitedimensional,little is known about *** shown in [15] (see also Proposition 2.2),A k is not compact if H(A) is *** this paper,it is proved that the Koszul duality theorem also holds when H(A) is finite-dimensional by using Foxby duality.A DG version of the BGG correspondence is deduced from the Koszul duality theorem.

关键词： Koszul differential graded algebra Koszul duality BGG correspondence

一株新型广谱肠侵袭性大肠杆菌噬菌体ΦEP1生物学特性及基因组分析

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生物工程学报 2024年第9期40卷 3216-3232页

作者：何继玮李宇行宗帅州钱敏张亚茹张章晟禹海杰曲道峰浙江工商大学食品与生物工程学院、浙江省食品安全重点实验室浙江杭州310018 嘉兴职业技术学院浙江嘉兴314036

为了给肠侵袭性大肠杆菌(enteroinvasive Escherichia coli,EIEC)的预防与治疗提供资源和参考,对EIEC噬菌体进行生物学特性和基因组分析。以实验室冻存的EIEC为宿主菌,从浙江湖州某养鸡场的环境污水样品中分离得到一株噬菌体,命名为ΦEP... 详细信息

为了给肠侵袭性大肠杆菌(enteroinvasive Escherichia coli,EIEC)的预防与治疗提供资源和参考,对EIEC噬菌体进行生物学特性和基因组分析。以实验室冻存的EIEC为宿主菌,从浙江湖州某养鸡场的环境污水样品中分离得到一株噬菌体,命名为ΦEP1。采用双层琼脂平板法测定噬菌体的效价以及最佳感染复数、一步生长曲线、温度、pH值、氯仿和胆盐敏感性等生物学特性,对噬菌体进行透射电镜检查以观察其形态,测试其在不同食品基质中的生物防治效果以及对Caco-2细胞的保护作用。结果表明,ΦEP1的最佳感染复数为0.1,效价为1.3×10^(10) PFU/mL。噬菌体对温度、pH、氯仿以及胆盐的耐受性均较强,具有较广的裂解谱,对多株不同血清型的多重耐药致病大肠杆菌和志贺氏菌均表现出裂解活性。噬菌体的潜伏期为10 min,爆发期为80 min,爆发量为48 PFU/cell。透射电镜观察显示噬菌体ΦEP1属于尾病毒目,同时对Caco-2细胞有良好的保护作用。噬菌体ΦEP1的基因组大小为87182bp,GC含量为39.80%,含有128个推定的开放阅读框(open reading frame,ORF),不含耐药基因和毒力因子。ΦEP1能显著抑制人工污染牛奶和牛肉中EIEC的增长,在细胞保护性实验中能有效消杀EIEC,显著提高Caco-2细胞的存活率,减少细胞因子白细胞介素6(interleukin-6,IL-6)和白细胞介素1β(interleukin-1β,IL-1β)的表达,使得炎症水平下调。本研究所得的肠侵袭性大肠杆菌噬菌体效价较高,对环境的耐受性较强,为噬菌体在食品保鲜等领域应用提供依据。

关键词：大肠杆菌噬菌体生物学特性基因组分析 Caco-2细胞细胞因子

基于BIM与UWB的融合定位技术在隧道施工精细化管理中的应用

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绿色建造与智能建筑 2024年第2期 38-42页

作者：赵硕何继伟刘泽王苗苗邓书舫中建电子信息技术有限公司北京100176

随着现代城市轨道交通工程的复杂性和规模不断增大,对隧道施工精细化管理的需求也越来越迫切。本文以重庆轨道交通15号线的铜锣山隧道为工程背景,首先对UWB (Ultra-Wide Band)定位技术和BIM (Building Information Modeling)技术二者融... 详细信息

随着现代城市轨道交通工程的复杂性和规模不断增大,对隧道施工精细化管理的需求也越来越迫切。本文以重庆轨道交通15号线的铜锣山隧道为工程背景,首先对UWB (Ultra-Wide Band)定位技术和BIM (Building Information Modeling)技术二者融合应用的可行性进行了研究,设计并实现了可视化融合定位系统,最后在工程实践中验证了该方法的有效性。研究表明,基于BIM与UWB的融合定位技术可以有效提高隧道施工管理精度、降低施工潜在风险、实现优化利用资源,达到精细化管理要求,具有较为广阔的应用前景。

关键词： BIM UWB定位技术地铁隧道施工管理精细化管理

D-equations and (H, A)-dimodules

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Northeastern Mathematical Journal 2003年第3期19卷 224-230页

作者：何济位 Department of Mathematics Zhejiang University Xixi Campus Hangzhou 310028 Department of Mathematics Shaoxing College of Arts and Sience Zhejiang 312000e present a kind of solutions of D-equations in terms of what we have called a D-pair in this paper. Some properties of dimodules associated with D-pairs are discussed as well.

We present a kind of solutions of D-equations in terms of what we have called a D-pair in this paper. Some properties of dimodules associated with D-pairs are discussed as well.

关键词： bialgebra,D-equation dimodule

Highly responsive broadband Si-based MoS2 phototransistor on high-k dielectric

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Science China(Information Sciences) 2024年第6期67卷 180-189页

作者： Ali IMRAN Xin he jiwei LIU Qinghai ZHU Muhammad SULAMAN Fei XUE Mingsheng XU Deren YANG College of Integrated Circuits State Key Laboratory of Silicon and Advanced Semiconductor MaterialsZhejiang University ZJU-Hangzhou Global Scientific and Technological Innovation Centre School of Materials Science and Engineering State Key Laboratory of Silicon and Advanced Semiconductor MaterialsZhejiang University Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems School of PhysicsBeijing Institute of Technology

The demand for photodetectors and image sensors has grown exponentially in the past decade in biomedical, security surveillance, robotics, automotive, quality control, image recognition, and military applications, due to their superior quality, broadband detection, lower noise, and economic viability. here,we report a MoS2channel-based phototransistor over an HfO2/n-Si substrate isolated by an h BN layer. The high photoresponse is achieved through the integration of the photoconduction, photogating, and mobility enhancement process by utilizing excellent features of MoS2, HfO2/Si, and h BN. The capacitive coupling of the photogenerated carriers by high-k dielectric HfO2leads to modulation of MoS2Fermi level due to electrostatic doping. Furthermore, the MoS2also contributes to the photogeneration of carriers due to its semiconducting nature, leading to additional photocurrent. Ultimately, the combination of photogating,photoconduction, and swift carrier extraction with remarkable mobility of 11.65 cm2· V-1· s-1results in high responsivity, external quantum efficiency, and detectivity of 4.5 × 10～8A · W-1, 0.72 × 10～6, and 6.20× 1016Jones at 266 nm illumination, respectively. The device also demonstrates broadband photoresponse from 266–1000 nm wavelengths. The high responsivity distinguishes the potential of our device for the future of optoelectronics and broadband image sensing applications.

关键词： photogating photoconduction two-dimensional materials high $~k$ dielectric carrier scattering phototransistor