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Evolution and development:engine-driven endodontic rotary nickel-titanium instruments

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International Journal of Oral Science 2022年第1期14卷 12-19页

作者： Yuhong liang lin Yue Department of Cariology and Endodontology Peking University School and Hospital of Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Research of Oral Biomaterials and Digital Medical Devices&Beijing Key Laboratory of Digital StomatologyBeijingChina

Various engine-driven NiTi endodontic files have been indispensable and efficient tools in cleaning and shaping of root canals for practitioners. In this review, we introduce the relative terms and conceptions of NiTi file, including crystal phase composition, the design of the cutting part, types of separation. This review also analysis the main improvement and evolution of different generations of engine-driven nickel-titanium instruments in the past 20 years in the geometric design, manufacturing surface treatment such as electropolishing, thermal treatment, metallurgy. And the variety of motion modes of NiTi files to improve resistance to torsional failure were also discussed. Continuous advancements by the designers, provide better balance between shaping efficiency and resistance to of NiTi systems. In clinical practice an appropriate system should be selected based on the anatomy of the root canal, instrument characteristics, and operators’ experience.

关键词： nickel titanium torsional

Estimating global land surface broadband thermal-infrared emissivityusing advanced very high resolution radiometer optical data

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International Journal of Digital Earth 2013年第S1期6卷 34-49页

作者： Jie cheng Shunlin liang State Key Laboratory of Remote Sensing Science College of Global Change and Earth System ScienceBeijing Normal UniversityBeijingChina Department of Geographical Science University of MarylandCollege ParkMDUSA

An algorithm for retrieving global eight-day 5 km broadband emissivity (BBE)from advanced very high resolution radiometer (AVHRR) visible and nearinfrared data from 1981 through 1999 was presented. Land surface was dividedinto three types according to its normalized difference vegetation index (NDVI)values: bare soil, vegetated area, and transition zone. For each type, BBE at813.5 mm was formulated as a nonlinear function of AVHRR reflectance forChannels 1 and 2. Given difficulties in validating coarse emissivity products withground measurements, the algorithm was cross-validated by comparing retrievedBBE with BBE derived through different methods. Retrieved BBE was initiallycompared with BBE derived from moderate-resolution imaging spectroradiometer (MODIS) albedos. Respective absolute bias and root-mean-square errorwere less than 0.003 and 0.014 for bare soil, less than 0.002 and 0.011 fortransition zones, and 0.002 and 0.005 for vegetated areas. Retrieved BBE wasalso compared with BBE obtained through the NDVI threshold method. Theproposed algorithm was better than the NDVI threshold method, particularly forbare soil. Finally, retrieved BBE and BBE derived from MODIS data wereconsistent, as were the two BBE values.

关键词： earth observation broadband emissivity global land surface satellite soil taxonomy advanced very high resolution radiometer moderate-resolution imaging spectroradiometer

A Bond Pricing Model with Credit Migration Risk:Different Upgrade and Downgrade Thresholds

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Acta Mathematicae Applicatae Sinica 2023年第3期39卷 765-777页

作者： Jin liang Yang lin School of Mathematical Sciences Tongji UniversityShanghai 200092China

In this paper, a new corporate bond pricing model with credit migration risk is proposed. This model sets different thresholds for the rising or falling of credit ratings, which forms a buffer zone that could reduce the frequency of credit rating changes. Mathematically, this model is a system of partial differential equations with overlapping area. The existence, uniqueness, regularity and asymptotic behavior of the solution are obtained. Furthermore, a numerical scheme and its stability, convergence and accuracy are discussed in detail. Calibration and analysis of the parameters are also suggested.

关键词： credit migration risk corporate bond pricing structural model buffer zone monotonic iteration calibration

Changes in Cold and Hot Syndromes and Gastrointestinal Bacterial Community Structure in Mice by Intervention with Food of Different Nature

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Chinese Journal of Integrative Medicine 2020年第6期26卷 448-454页

作者： liang Zhang-cheng LI Wei-xin HE Zhi-gang lin Xiao-zi REN Xiang-yun lin Xiao-jie Institute of Agricultural Engineering Technology Fujian Academy of A gricultural SciencesFuzhou(350003)China Fujian Key Laboratory of Agricultural Products(Food)Processing Fuzhou(350003)China

Objective:To reveal the effect of foods with different natures on cold or hot syndrome and gastrointestinal bacterial community structure in ***:Forty-five 6-week-old male ICR Kunming mice of clean grade were divided into 5 groups,9 per group,including the control(CK),hot nature herb medicine(HM),Hong Qu glutinous rice wine(RW),tea rice wine(TW),and cold nature herb medicine(CM)*** water or corresponding herbs were administered to mice(0.01 mL/g body weight)in the 5 groups by gastric infusion respectively,once daily for 28 ***,behavior,and serum biochemical indicators,including 5-hydroxytryptamine(5-HT),thyroid stimulating hormone(TSH),noradrenaline(NE),cyclic adenosine monophosphate(cAMP)and cyclic guanosine monophosphate(cGMP),the hot nature index,as well as the gastrointestinal bacterial community structure were analyzed in all groups after ***:After supplementation for 28 d,CM and TW mice showed different degrees of cold syndrome,and HM and RW mice showed different degrees of hot *** with the HM and RW mice,the TSH,NE,cAMP levels and hot nature indices in the CM and TW mice were significantly decreased and 5-HT and cGMP levels were significantly increased(P<0.05).There was no obvious change in appearance or behavior in CK *** of clustering analysis showed that the gastrointestinal bacterial community structures were highly similar in TW and CM mice as well as in RW and HM mice,and that they were from the same branch,respectively,when the distance was *** key microbes associated with cold syndrome were Lachnospiraceae uncultured,Lactococcus,etc.,and the key microbes associated with hot syndrome were S24-7 norank,Ruminococcaceae uncultured,***:The interventions with different nature foods could change cold or hot syndrome in mice,leading to changes in gastrointestinal bacterial community structure.

关键词： gastrointestinal bacterial community structure different natural foods cold or hot syndrome Hong Qu glutinous rice wine key microbe

贻贝肽对厚壳贻贝稚贝生长发育及微生物群落结构的影响

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渔业科学进展 2025年第1期46卷 115-126页

作者：林倩李政杨金龙马蕃梁箫上海海洋大学水产与生命学院科技部海洋生物科学国际联合研究中心上海201306 上海市水产动物良种创制与绿色养殖协同创新中心上海201306 中国-葡萄牙星海“一带一路”联合实验室上海200120

为探究海洋生物活性肽对厚壳贻贝(Mytilus coruscus)生长发育的影响,本研究以厚壳贻贝稚贝为实验对象,通过投喂不同浓度的贻贝肽(0、7、9、10、70和90 mg/L),测定壳长、壳高、湿重等指标,以确定最适贻贝肽浓度,并对投喂前后的稚贝微生... 详细信息

为探究海洋生物活性肽对厚壳贻贝(Mytilus coruscus)生长发育的影响,本研究以厚壳贻贝稚贝为实验对象,通过投喂不同浓度的贻贝肽(0、7、9、10、70和90 mg/L),测定壳长、壳高、湿重等指标,以确定最适贻贝肽浓度,并对投喂前后的稚贝微生物群落进行分析,实验周期为56 d。结果显示,相较于未投喂贻贝肽的对照组,投喂9 mg/L的贻贝肽显著促进稚贝生长,且壳长、壳高和湿重分别提升了27.37%、32.35%和115.49%;同时发现,高浓度贻贝肽(70 mg/L和90 mg/L)对厚壳贻贝稚贝产生了致死效应。通过16S rRNA基因扩增和测序对比分析了28 d和56 d贻贝肽投喂组与未投喂组的厚壳贻贝稚贝微生物组群落结构变化。研究结果显示,投喂9 mg/L贻贝肽改变了稚贝微生物群落结构组成,提高了拟杆菌门(Bacteroidota)和变形菌门(Proteobacteria)的丰度,降低了放线菌门(Actinobacteriota)的丰度;同时,属水平分析发现,贻贝肽投喂组有效增加了鲁杰氏菌属(Ruegeria)、黏着杆菌属(Tenacibaculum)、居海杆菌属(Maribacter)、栖砂杆菌属(Arenibacter)、十八碳杆菌属(Octadecabacter)和希瓦氏菌属(Shewanella)等有益菌的物种丰度,显著减少了红球菌属(Rhodococcus)、气单胞菌属(Aeromonas)等潜在致病菌的丰度。综上,贻贝肽能有效促进厚壳贻贝的稚贝生长发育,并且可以优化厚壳贻贝微生物群落结构,研究成果将为后续开展贻贝肽等海洋生物活性肽对贝类稚贝中间培育以及海水贝类养殖可持续发展提供基础和数据支撑。

关键词：厚壳贻贝生长微生物群落结构贻贝肽

Quasi-periodically Forced Logistic Map with Weak Liouvillean Frequency

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Acta Mathematica Sinica,English Series 2024年第10期40卷 2411-2435页

作者： Jin Hao liang lin lin FU Department of Applied Mathematics Nanjing Forestry UniversityNanjing 210037P.R.China School of Mathematics and Statistics Shaoguan UniversityShaoguan 512005P.R.China

Consider a class of quasi-periodically forced logistic maps T×[0,1]■:(θ,x)→(θ+ω,c(θ)x(1-x))(T=R/Z),whereωis an irrational frequency and c(θ)is a specific bimodal *** prove that under weak Liouvillean condition on frequency,the strange non-chaotic attractor occurs with negative Lyapunov *** extends the result in[Bjerklov,CMP,2009].

关键词： Quasi-periodically forced logistic map strange non-chaotic attractor weak Liouvillean frequency Lyapunov exponent

Joint Continuity of Lyapunov Exponent for Finitely Smooth Quasi-periodic Schrodinger Cocycles

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Acta Mathematica Sinica,English Series 2021年第7期37卷 1131-1142页

作者： Jin Hao liang lin lin FU Department of Applied Mathematics Nanjing Forestry UniversityNanjing 210037P.R.China Department of Mathematics Sun Yat-sen UniversityGuangzhou 510275P.R.China

We prove the joint continuity of Lyapunov exponent in the energy and the Diophantine frequency for quasi-periodic Schrodinger cocycles with the C^(2)cos-type *** particular,the Lyapunov exponent is log-Holder continuo... 详细信息

关键词： Schrodinger cocycle Lyapunov exponent C^(2)cos-type potential

Temperature,pressure,and humidity SAW sensor based on coplanar integrated LGS

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Microsystems & Nanoengineering 2023年第5期9卷 87-99页

作者： Xiaorui liang Lei Zhang Qiulin Tan Wenhua cheng Dan Hu Shuang Li lin Jing Jijun Xiong State Key Laboratory of Dynamic Measurement Technology North University of ChinaTaiyuan 030051China Key Laboratory of Micro/nano Devices and Systems Ministry of EducationNorth University of ChinaTai Yuan 030051China School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore

This paper presents a surface acoustic wave(SAW)sensor based on coplanar integrated Langasite(LGS)that is fabricated using wet etching,high-temperature bonding,and ion beam etching(IBE)*** miniaturized multiparameter temperature‒pressure-humidity(TPH)sensor used the MXene@MoS2@Go(MMG)composite to widen the humidity detection range and improve the humidity sensitivity,including a fast response time(3.18 s)and recovery time(0.94 s).The TPH sensor was shown to operate steadily between 25–700°C,0–700 kPa,and 10–98%*** issues among multiple parameters in complex environments were addressed by decoupling theΔf-temperature coupling factor to improve the ***,this work can be applied to simultaneous measurements of several environmental parameters in challenging conditions.

关键词： LGS humidity sensor

Metachronous isolated penile metastasis from sigmoid colon adenocarcinoma:A case report

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World Journal of Clinical Cases 2022年第31期10卷 11658-11664页

作者： Guo-lin Yin Jiang-Bo Zhu cheng-lin Fu Ru-liang Ding Jun-Miao Zhang Qian lin Department of Urology Taizhou First People's HospitalTaizhou 318020Zhejiang ProvinceChina Department of Pathology Taizhou First People's HospitalTaizhou 318020Zhejiang ProvinceChina Department of Anorectology Taizhou First People's HospitalTaizhou 318020Zhejiang ProvinceChina

BACKGROUND Sigmoid colon adenocarcinoma has a high incidence among gastrointestinal tumors,and it very rarely metastasizes to the *** literature reports that the prognosis after penile metastasis is generally poor,with a median survival of about 9 *** isolated metastasis to the penis originating from sigmoid colon adenocarcinoma has not been reported so ***,we report a case of sigmoid colon adenocarcinoma with isolated penile metastasis occurring 2 years after *** mass was pathologically confirmed as metastatic adenocarcinoma,and oral chemotherapy with capecitabine was given after *** tumor did not recur during the 2-year follow-up *** SUMMARY A 79-year-old man presented to the urology department with"a mass located at the root of the penis since 1 mo".Enhanced computed tomography(CT)examination suggested a 12 mm×10 mm×9 mm nodule at the root of the right penile corpus ***,pulmonary,and abdominal CT;and bone scan did not show any tumorigenic *** carcinoembryonic antigen(CEA)level was slightly elevated(6.01 ng/mL,reference value 0-5 ng/mL).The patient had undergone laparoscopic radical sigmoidectomy for sigmoid colon cancer 2 years *** postoperative pathology showed moderately differentiated adenocarcinoma of the sigmoid colon,and the stage was *** penile mass was removed under general *** postoperative pathology showed adenocarcinoma,and immunohistochemistry showed CDX2(+),CK20(+),and Villin(+).Based on the medical history,he was diagnosed with penile metastasis from sigmoid colon *** CEA level returned to normal(3.34 ng/mL)4 d after *** chemotherapy with capecitabine was given subsequently,and tumor recurrence was not found during the 2-year follow-up *** To our knowledge,this is a rare case of metachronous isolated penile metastasis from sigmoid colon *** penis is a potential site of metastasis of colon adenocarcinoma,an

关键词： Colon adenocarcinoma Penis Metastases Metachronous Adenocarcinoma Case report