检索结果-南通市图书馆

Interface engineering of transition metal dichalcogenide/GaN heterostructures:Modified broadband for photoelectronic performance

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2022年第11期31卷 515-521页

作者： Yinlu Gao kai cheng Xue Jiang Jijun Zhao Key Laboratory of Materials Modification by Laser Ion and Electron Beams(Dalian University of Technology)Ministry of EducationDalian 116024China School of Electronic Engineering Xi’an University of Posts and TelecommunicationsXi'an 710121China

The GaN-based heterostructures are widely used in optoelectronic devices,but the complex surface reconstructions and lattice mismatch greatly limit the *** stacking of two-dimensional transition metal dichalcogenide(TMD=MoS_(2),MoSSe and MoSe_(2))monolayers on reconstructed GaN surface not only effectively overcomes the larger mismatch,but also brings about novel electronic and optical *** adopting the reconstructed GaN(0001)surface with adatoms(N-ter GaN and Ga-ter GaN),the influences of complicated surface conditions on the electronic properties of heterostructures have been *** passivated N-ter and Ga-ter GaN surfaces push the mid-gap states to the valence bands,giving rise to small bandgaps in *** charge transfer between Ga-ter GaN surface and TMD monolayers occurs much easier than that across the TMD/N-ter GaN interfaces,which induces stronger interfacial interaction and larger valence band offset(VBO).The band alignment can be switched between type-I and type-II by assembling different TMD monolayers,that is,MoS_(2)/N-ter GaN and MoS_(2)/Ga-ter GaN are type-II,and the others are *** absorption of visible light is enhanced in all considered TMD/reconstructed GaN ***,MoSe_(2)/Ga-ter GaN and MoSSe/N-ter GaN have larger conductor band offset(CBO)of 1.32 eV and 1.29 eV,respectively,extending the range from deep ultraviolet to infrared *** results revel that the TMD/reconstructed GaN heterostructures may be used for high-performance broadband photoelectronic devices.

关键词： GaN-based device surface reconstructions transition metal dichalcogenide(TMD) absorption spectra

HBsAg阳性孕产妇HBV宫内感染危险因素及其与IL-28B基因多态性的关联

在线全文

学校读者我要写书评

暂无评论

中华医院感染学杂志 2024年第9期34卷 1397-1400页

作者：张效民王静郑开呈刁雪晨孟庆华济南市第二妇幼保健院产一科山东济南271100 济南市第二妇幼保健院妇女保健科山东济南271100 济南市第二妇幼保健院检验科山东济南271100 济南市人民医院新生儿科山东济南271100

目的探讨乙型肝炎病毒(HBV)携带孕产妇HBV宫内感染危险因素及其与白细胞介素-28B(IL-28B)基因多态性的关联。方法选择济南市第二妇幼保健院2019年1月-2022年2月收治的620例HBsAg阳性孕产妇为研究对象,其中50例发生HBV宫内感染患者为感染... 详细信息

目的探讨乙型肝炎病毒(HBV)携带孕产妇HBV宫内感染危险因素及其与白细胞介素-28B(IL-28B)基因多态性的关联。方法选择济南市第二妇幼保健院2019年1月-2022年2月收治的620例HBsAg阳性孕产妇为研究对象,其中50例发生HBV宫内感染患者为感染组,570例未发生HBV宫内感染患者为未感染组,统计两组IL-28B基因rs8099917位点多态性,分析HBV宫内感染危险因素。结果感染组GG基因型及G等位基因频率均高于未感染组(P10^(6)copies/ml、肝脏B超改变及前S1蛋白阳性(P<0.05)。结论HBsAg阳性孕产妇HBV宫内感染与IL-28B基因多态性、HBV DNA水平、肝脏B超改变、前S1蛋白阳性有关。

关键词：孕产妇乙肝表面抗原乙型肝炎病毒白细胞介素28B 宫内感染危险因素

Laparoscopic vs open liver re-resection for cirrhotic patients with post-hepatectomy hepatocellular carcinoma recurrence:A comparative study

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Surgery 2022年第5期14卷 409-418页

作者： kai-Chi cheng Kit-Man Ho Department of Surgery Kwong Wah HospitalHong Kong 999077China

BACKGROUND Repeated liver resection is an effective treatment for recurrent hepatocellular carcinoma(HCC).However,few studies have compared the outcome of laparoscopic repeat hepatectomy(LRH)and open repeat hepatectomy(ORH)for recurrent HCC,and few of those have included cirrhotic *** To compare short-term and long-term outcomes of cirrhotic patients with LRH and ORH for recurrent *** We retrospectively analysed the clinical records retrieved from a prospectively collected database of all patients who underwent hepatectomy for posthepatectomy recurrent HCC at our institute between May 2006 and June *** of recurrent HCCs larger than 7 cm were *** demographics,operative details,perioperative outcomes,pathologic details,disease-free survival(DFS),and overall survival(OS)data of LRH and ORH were *** Data from 29 patients with LRH and 22 with ORH were *** LRH group showed significantly better outcomes for blood loss(median 300 mL vs 750 mL,P=0.013)and length of hospital stay(median 5 d vs 7 d,P=0.003).The 1-,3-and 5-year OS rates in the LRH group were 100.0%,60.0%and 30.0%,respectively;the corresponding rates in the ORH group were 81.8%,36.4%and 18.2%(P=0.336).The 1-,3-and 5-year DFS rates in the LRH group were 68.2%,27.3%and 4.5%,respectively;the corresponding rates in the ORH group were 31.3%,6.3%and 6.3%(P=0.055).There were no significant differences in overall and DFS between the two *** Laparoscopic re-resection should be considered for patients presenting with recurrent HCC less than or equal to 7 cm after previous hepatectomy.

关键词： Hepatocellular carcinoma Recurrence Repeat hepatectomy Laparoscopic hepatectomy Outcome Overall survival Disease-free survival

不同病情分级的脓毒症患者早期血清中细胞因子的变化研究

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

黑龙江医学 2024年第3期48卷 261-263,267页

作者：程凯刘钰刘胜国潘英任珊新疆石河子大学新疆石河子832000 新疆石河子大学医学院第一附属医院重症医学一科新疆石河子832000

目的:探究不同病情分级的脓毒症患者早期血清中肿瘤坏死因子-α(TNF-α)、干扰素-γ(IFN-γ)、白介素-4(IL-4)及白介素-10(IL-10)含量变化规律及意义。方法:选取2021年10月—2022年10月新疆石河子大学医学院第一附属医院ICU收治的47例... 详细信息

目的:探究不同病情分级的脓毒症患者早期血清中肿瘤坏死因子-α(TNF-α)、干扰素-γ(IFN-γ)、白介素-4(IL-4)及白介素-10(IL-10)含量变化规律及意义。方法:选取2021年10月—2022年10月新疆石河子大学医学院第一附属医院ICU收治的47例脓毒症患者作为研究对象,按急性生理和慢性健康评分(APACHEⅡ)将患者分为APACHEⅡ≤15分组14例、15分25分组18例。分别在确诊时、确诊后6 h、12 h、24 h、48 h、72 h采血,并选取医院同期收治的15例非脓毒症患者作为对照组,细胞因子检测采用酶联免疫吸附法。结果:APACHEⅡ≤15分组TNF-α、IFN-γ与对照组比较,差异有统计学意义(P25分组TNF-α、IFN-γ、IL-10、IL-4水平高于15分

关键词：脓毒症肿瘤坏死因子-α 干扰素-γ 白介素-10 白介素-4 免疫状态

Photoacoustic detection of follicular thyroid carcinoma using targeted Nano-Au-Tripods

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2022年第4期35卷 1-7页

作者： Yang Gui kai cheng Ruojiao Wang Sirui Liu Chenyang Zhao Rui Zhang Ming Wang Zhen cheng Meng Yang Department of Ultrasound State Key Laboratory of Complex Severe and Rare DiseasesPecking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Molecular Imaging Program at Stanford(MIPS) Department of Radiology and Bio-X ProgramSchool of MedicineStanford UniversityStanford CA 94305-5484USA

Follicular thyroid carcinoma(FTC)is the second most common form of thyroid malignancy,and it is associated with more aggressive growth and worse long-term survival outcomes relative to papillary thyroid carcinoma(PTC).Reliable approaches to preoperative FTC detection,however,remain to be ***,a targeted Affibody-Au-Tripod nanoprobe was developed and successfully utilized to facilitate the targeted photoacoustic imaging(PAI)of epidermal growth factor receptor(EGFR)-positive cells and *** Affibody-Au-Tripods were found to be highly sensitive and specific for cells expressing EGFR when used as a PA contrast agent in vitro,and studies conducted in an FTC-133 subcutaneous tumor model system in mice further revealed that these Affibody-Au-Tripods were able to specifically target these EGFR-expressing tumors while providing a strong photoacoustic signal in ***,these nanoprobes exhibited negligible cytotoxicity and robust chemical and physical stability,making Affibody-Au-Tripods promising candidates for targeted PAI-based FTC *** addition,these nanoprobes have the potential to facilitate the individualized treatment of patients harboring EGFRpositive tumors.

关键词： Affibody Follicular thyroid carcinoma Nano-Au-Tripods Nanoprobe Photoacoustic imaging

High performance white LED driver with single-wire serial-pulse digital dimming

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2009年第1期16卷 95-99,110页

作者： YU kai ZOU Xue-cheng LONG Shuang WANG Wei-xu Department of Electronic Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

A high performance white light emitter diode （LED） driver based on boost converter with novel single-wire serial-pulse digital dimming （SWSP） is proposed. The driver uses external serial programmed pulses and internal clock to simplify brightness control By embedding a 5-bit digital analog converter （DAC） into the driver, wide dimming range is achieved. Moreover, a new dynamic slope compensation circuit is presented and other key circuits of the driver are optimized to get higher efficiency and fast transition response. A practical circuit is implemented with 0.6 um bipolar complementary-metal-oxide-semiconductor double-diffused-metal-oxide-semiconductor （BCD） technology. The simulation results show that the driver can provide both wide output current from 1.3 mA to 42 mA with 32-level digital dimming and higher efficiency up to 83% while it works at 1 MHz switching frequency with the input voltage variation from 2.7 V to 5.5 V.

关键词： White LED driver boost converter single-wire serial-pulse digital dimming dynamic slope compensation

在线全文

学校读者我要写书评

暂无评论

贝伐珠单抗相关性高血压的研究现状

中国临床药理学杂志 2024年第5期40卷 763-767页

作者：王欢马松涛肖洪涛陈燕阴骏徐珂程凯成都医学院药学院四川成都610500 四川省肿瘤临床医学研究中心四川省肿瘤医院研究所四川省癌症防治中心电子科技大学附属肿瘤医院药学部四川成都610041 四川省肿瘤临床医学研究中心四川省肿瘤医院研究所四川省癌症防治中心电子科技大学附属肿瘤医院放疗中心四川成都610041

目的贝伐珠单抗已广泛用于结直肠癌、卵巢癌、宫颈癌、非小细胞肺癌等肿瘤疾病。贝伐珠单抗治疗期间常见药物不良反应包括蛋白尿、血栓、出血、胃肠穿孔和高血压等,其中高血压的发生率高达19%~47%。高血压的发生会影响患者的生活质量,... 详细信息

目的贝伐珠单抗已广泛用于结直肠癌、卵巢癌、宫颈癌、非小细胞肺癌等肿瘤疾病。贝伐珠单抗治疗期间常见药物不良反应包括蛋白尿、血栓、出血、胃肠穿孔和高血压等,其中高血压的发生率高达19%~47%。高血压的发生会影响患者的生活质量,阻碍肿瘤治疗的正常开展,甚至诱发严重心血管疾病,增加死亡风险,需要临床高度重视。本文从贝伐珠单抗相关性高血压的机制、影响因素、预后及相关治疗的研究现状做一综述,为临床合理用药提供参考依据。

关键词：贝伐珠单抗血管生长因子抗肿瘤血管生成药物不良反应高血压预防和治疗

Smart Cutting Tools and Smart Machining: Development Approaches, and Their Implementation and Application Perspectives

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2017年第5期30卷 1162-1176页

作者： kai cheng Zhi-Chao Niu Robin C.Wang Richard Rakowski Richard Bateman College of Engineering Design and Physical SciencesBrunel University London

Smart machining has tremendous potential and is becoming one of new generation high value precision manufacturing technologies in line with the advance of Industry 4.0 concepts. This paper presents some innovative design concepts and, in particular, the development of four types of smart cutting tools, including a force-based smart cutting tool, a temperature-based internally-cooled cutting tool, a fast tool servo （FTS） and smart collets for ultra- precision and micro manufacturing purposes. Implemen- tation and application perspectives of these smart cutting tools are explored and discussed particularly for smart machining against a number of industrial application requirements. They are contamination-free machining, machining of tool-wear-prone Si-based infra-red devices and medical applications, high speed micro milling and micro drilling, etc. Furthermore, implementation tech- niques are presented focusing on：（a） plug-and-produce design principle and the associated smart control algo- rithms, （b） piezoelectric film and surface acoustic wave transducers to measure cutting forces in process, （c） critical cutting temperature control in real-time machining, （d） in- process calibration through machining trials, （e） FE-based design and analysis of smart cutting tools, and （f） applica- tion exemplars on adaptive smart machining.

关键词： Smart cutting tool Smart machining Fast toolservo (FFS) Precision machining Micro manufacturing Smart tooling

Non-frozen process of heavy-ion fusion reactions at deep sub-barrier energies

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2022年第10期33卷 117-125页

作者： kai-Xuan cheng Jie Pu Yu-Ting Wang Ya-Fei Guo Chun-Wang Ma School of Physics Henan Normal UniversityXinxiang 453007China

The hindrance in heavy-ion fusion reactions a deep sub-barrier energies is investigated using the double folding model with a hybrid method between the frozen and adiabatic density *** this method,the density distributions of the projectile and the target depend closely on the distance between *** the distance decreased,the half-density radii of the colliding nucle gradually increased to the half-density radius of the compound *** total potential based on this non-frozen approximation generates a slightly shallower pocket and becomes more attractive inside the pocket compared to that obtained from the frozen approximation.A damping factor was used to simulate the decline of the coupled channel effects owing to the density rearrangement of the two colliding *** calculated fusion cross-sections and astrophysical S factors at the deep sub-barrier energies are both in good agreement with the experimental data for the medium-heavyNi+Ni and medium-lightMg+Si mass *** addition,it was concluded that the apparent maximum of the S factors most likely appears in fusion systems with strong coupling effects.

关键词： Adiabatic approximation Double folding model Fusion hindrance