检索结果-南通市图书馆

脑CT诊断后颅窝小卒中:脑CT迭代重建算法对检测性能的影响

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2017年第6期 733-734页

作者： T.Inoue T.Nakaura M.Yoshida k.Yokoyama k.hirata M.kidoh 张毓婧 Department of Radiology Amakusa Medical Center

摘要目的本研究旨在确定脑CT全模型迭代重建(IMR-neuro)能否提高脑CT对后颅窝脑卒中的诊断准确性。方法纳入37例后颅窝缺血性脑卒中病人和37例无脑卒中

关键词：后颅窝梗死区域缺血性脑卒中 CT

由ODP Leg191布设的海底井下宽频带地震仪系统

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

世界地震译丛 2004年第6期35卷 80-82页

作者： M．Shinohara E．Araki T．kanazawa M．Mochizuki k.hirata k．Suyehiro H．Mikada T．Yamada Y．kaiho 周公威郝春月吕春来不详中国地震局地球物理研究所

名为WP-2的新井下地震观测站由ODP Leg191成功地布设在西北太平洋海盆的ODP1179E钻孔。为了研究地球构造,WP-2台站被安置在一个独特的点位。两套宽频带地震仪用水泥固定在玄武岩层内,通过ROV号潜艇来驱动系统并检查系统的工作状态。ROV... 详细信息

名为WP-2的新井下地震观测站由ODP Leg191成功地布设在西北太平洋海盆的ODP1179E钻孔。为了研究地球构造,WP-2台站被安置在一个独特的点位。两套宽频带地震仪用水泥固定在玄武岩层内,通过ROV号潜艇来驱动系统并检查系统的工作状态。ROV也用于回收初始数据。WP-2台站的地震噪声水平对地震观测而言是足够低的。

关键词：井下地震观测站北太平洋宽频带地震仪噪声处理安装操作

维普期刊数据库

Physicochemical properties of Li_(3)Ba_(2)La_(3)(MoO_(4))_(8):Eu,Tb red-emitting phosphor for solid state white lamps

在线全文

学校读者我要写书评

暂无评论

稀土学报:英文版 2023年第9期41卷 1279-1287,I0001页

作者： kora Lu Rojas Baldivia Gustavo A.hirata Center for Scientific Research and Higher Education of Ensenada Ensenada Baja California 22860Mexico Center for Nanoscience and Nanotechnology National Autonomous University of Mexico EnsenadaBaja Califomia 22860Mex

In this work,combustion synthesis was used for the first time to fabricate a phosphor material with red emission for applications in solid-state white-light *** synthesized a material with emission wavelength at λ_(em)=617 nm,excited under long UV-blue wavelength based on Eu^(3+),Tb^(3+)-activated molybdates Li_(3)Ba_(2)(La_(1-x-y)Eu_(x)Tb_(y))_(3)(MoO_(4))_(8) with 0 ≤ x ≤1 and 0 ≤ y ≤ 1.A series of powder samples were produced by the combustion method and post-annealed at 800℃ in *** crystalline phase formation was investigated by X-ray diffraction,which reveals the monoclinic C2/c(15) space *** is observed that crystalline structure and morphology are preserved when the host lattice is doped with Eu^(3+) or Tb^(3+) single ions and co-doped with both ions at different doping concentrations.A detailed characterization by scanning electron microscopy(SEM) and transmission electron microscopy(TEM)shows a similar morphology in all samples:rather large(1-7 μm) agglomerate particles with irregular shapes and surrounded by smaller nanoparticles of 50 nm in ***-visible absorption spectra confirm the presence of Eu^(3+) and Tb^(3+) *** luminescent properties of the obtained phosphors were studied in *** measurements indicate that the best emission intensity is for Eu^(3+):Tb^(3+)doping ratios of 80:0,90:0 and 20:*** the other hand,samples with 80:0,60:40,and 20:80 doping ratios show the highest intensity in a detailed photoluminescence analysis and they exhibit the highest quantum yield values.A complete and efficient energy transfer from the sensitizer Tb^(3+) to the activator Eu^(3+) is observed in all co-doped phosphors post-annealed at 800℃ for 4 ***,the Li_(3)Ba_(2)La_(3)(MaO_(4))_(8):Eu^(3+),Tb^(3+) materials fabricated by combustion synthesis are excellent phosphors for being applied as red-emitting component in solid-state white-light lamps due to an improved color rendering index(CRI) that can be obtained under lo

关键词： Molybdate Europium Terbium Luminescence Phosphor-converted LED Rare earths

维普期刊数据库

Regulation of the growth of sprouting roots of black locust seedlings using root barrier panels

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2023年第3期34卷 655-664页

作者： Satoshi kitaoka Shiro Matsunami Yannan Wang Saki Fujita kobayashi Makoto Toshiyuki hirata Takayoshi koike Graduate School of Agriculture Hokkaido UniversitySapporo 060-8589Japan The Robust Greenhouse Project of Hokkaido University Sapporo 060-8589Japan Present Address:Oyo Cooperation Ltd Sumitomo BuildingTokyo 101-8486Japan Jiangxi Academy of Forestry Nanchang 330029People’s Republic of China Forestry and Forest Products Research Institute Tsukuba 305-8687Japan Field Science Center for Northern Biosphere Hokkaido UniversitySapporo 060-0809Japan Research Faculty of Agriculture Hokkaido UniversitySapporo 060-8589Japan

How can we regulate an invasive alien species of high commercial value?Black locust(Robinia pseudoacacia L.)has a unique capacity for seed dispersal and high *** surveys indicate that black locust increases its growing area with sprouting roots and the elongation of horizontal roots at a soil depth of 10 ***,a method to regulate the development of horizontal roots could be eff ective in slowing the invasiveness of black *** this study,root barrier panels were tested to inhibit the growth of horizontal *** it is labor intensive to observe the growth of roots in the fi eld,it was investigated in a nursery *** decrease in secondary fl ush,an increase in yellowed leafl ets,and the height in the seedlings were *** root barrier panels to a depth of 30 cm eff ectively inhibit the growth of horizontal roots of young black locust.

关键词： Black locust Horizontal roots Nutrients Root barrier panel Sprouting roots

维普期刊数据库

Sunitinib-induced hyperammonemic encephalopathy in metastatic gastrointestinal stromal tumors:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第31期11卷 7629-7634页

作者： Takaoki Hayakawa Shinsuke Funakoshi Yasuo Hamamoto kenro hirata Takanori kanai Department of Internal Medicine Division of Gastroenterology and HepatologyKeio University School of MedicineShinjuku-ku 160-8582TokyoJapan Division of Medical Oncology Department of Internal MedicineTokyo Saiseikai Central HospitalMinato-ku 108-0073TokyoJapan keio Cancer Center Keio University School of MedicineShinjuku-ku 160-8582TokyoJapan Department of Internal Medicine Keio University School of MedicineShinjuku-ku 160-8582TokyoJapan

BACkGROUND Sunitinib,a multi-targeted tyrosine kinase inhibitor(TkI),has been approved for the salvage treatment of gastrointestinal stromal tumors(GIST).Hyperammonemic encephalopathy is a rare but severe complication of sunitinib ***,we present the case of a 66-year-old male with metastatic GIST without underlying liver cirrhosis who developed sunitinib-induced hyperammonemic *** SUMMARY A 66-year-old male with metastatic GIST was admitted because of reduced *** was administered as the first-line systemic *** experienced repeated episodes of peritonitis due to tumor perforation,and surgery was *** disease was confirmed based on increased liver metastasis,and sunitinib was initiated as a salvage ***,23 d after the third course of sunitinib,he presented to the emergency room with an episode of altered consciousness and behavioral *** on the patient clinical history and examination findings,sunitinib-induced encephalopathy was *** was discontinued,and the patient was treated for *** patient had a normal level of consciousness four days later,and the serum ammonia level gradually *** further neurological symptoms were reported in subsequent *** TkI-induced hyperammonemic encephalopathy is potentially *** receiving TkIs experiencing adverse reactions should undergo systemic evaluation and prompt treatment.

关键词： Tyrosine protein kinase inhibitors Sunitinib malate Hyperammonemic encephalopathy Gastrointestinal stromal tumors Case report

Magnetic Pair-Breaking in Y1-xHoxNi2B2C （x = 0, 0.25, 0.5, 0.75） Single Crystals

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2006年第4期23卷 975-977页

作者：赵松睿沈静琴许祝安 Takeya H hirata k Department of Physics Zhejiang University Hangzhou 310027 National Institute for Materials Science 1-2-1 Sengen Tsukuba Ibaraki 305-0047 Japan

Temperature-dependent resistivity and magnetic susceptibility were studied for quaternary borocarbide intermetallic compounds Y1-xHoxNi2B2C （x = 0, 0.25, 0.5, 0. 75）, which show coexistence of superconductivity with magnetism. In a normal state, the compounds exhibit conventional metallic behaviour. The Debye temperature θD is derived by fitting the temperature dependence of resistivity to the Bloch-Gruneisen expression, i.e. θD scales with M^-0.5 （M is the averaged atomic mass on the Y^3＋ site）, which means that the acoustic mode of the lattice vibrating spectrum is influenced by the Y^3＋ site atoms. Fitting the temperature-dependent magnetic susceptibility above TN to the Curie-Weiss law, effective magnetic moment μeff is deduced, and then de Gennes factor dG is calculated. It is found that as Ho content increases, μeff as well as dG increases and Tc decreases. Moreover, the decrease of Tc scales with dG, i.e., △Te ∝ -nI^2 N （EF ）dG, which is consistent with the prediction of the Abrikosov-Gor＇kov theory. We suggest that pair-breaking effect of magnetic Ho^3＋ ions. The significant impact on To. the depression of Tc could be mainly ascribed to the magnetic change of Debye temperature with Ho content may not have significant impact on Tc.

关键词： ANTIFERROMAGNETIC SUPERCONDUCTOR HONI2B2C ORDER TRANSPORT METALS

Increased prevalence of intestinal inflammation in patients with liver cirrhosis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 1999年第5期5卷 391-396页

作者： Saitoh O Sugi k Lojima k Matsumoto H Nakagawa k kayazawa M Tanaka S Teranishi T hirata I katsu ki k Second Department of Internal Medicine Osaka Medical College Takatsuki Japan Department of Gastroenterology Ijinkai Takeda General Hospital Kyoto Japan

AIM To investigate the pathophysiology of the digestive tract in patients with liver *** In 42 cirrhotic patients and 20control subjects, the following fecal proteinswere measured by enzyme-linkedimmunosorb6nt assay: albumin (Alb ),transferrin (Tf), and al-antitrypsin (a,-AT) as amarker for intestinal protein l0ss, hemoglobin(Hb) for bleeding, PMN-eIastase for intestinalinflammation, and secretory lgA for *** The fecaI concentrations of Hb, Alb,Tf, al-AT, and PMN’eIastase were increased in13 (3l%), 8(19%), l0(24%), 6(14%), and 1l(26%) cases among 42 patients, resPectiveIy.F6cal concentration of secretory IgA wasdecreased in 7 (l7%) of 42 patients. However,these fecal concentrations were not related tothe severity or etiology of liver cirrhosis. Theserum Alb level was significantIy decreased inpatients with intestinal protein Ioss c0mpared tothat in patients without intestinal protein *** These findings suggest that: rob6sides the weIl’known pathological conditions,Such as bleeding and protein loss, intestinaIinflammati0n and decreased intestinaI immunityare found in cirrhotic patients, @ intestinalprotein loss contributes to hypoalbuminemia incirrhotic patients, and @ intestinaI inflammationshouId not b6 0verlooked in cirrhotic patients,since it may contribute to or cause intestinalprotein Ioss and oth6r various pathologicalconditions.

关键词： liver cirrhosis intestinal inflammation secretory IgA fecal proteins

Characteristics and predictors of gastric cancer after Helicobacter pylori eradication

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2018年第20期24卷 2163-2172页

作者： Satoki Shichijo Yoshihiro hirata Department of Gastrointestinal Oncology Osaka International Cancer Institute Division of Advanced Genome Medicine The Institute of Medical Science The University of Tokyo

Helicobacter pylori(H. pylori) eradication can reduce gastric cancer. However, gastric cancer still develops after eradication, and cases who received eradication therapy are increasing. In this study, we have reviewed the characteristics and predictors of primary gastric cancer developing after H. pylori eradication. In terms of the characteristics, endoscopic, histologic, and molecular characteristics are reported. Endoscopically, gastric cancer after eradication is often depressedtype and shows a gastritis-like appearance, which sometimes makes the diagnosis difficult. Histologically, most gastric cancer after eradication is intestinal type, and non-neoplastic epithelium, also called epithelium with low-grade atypia, is frequently seen over the tumor, which is presumably the cause of the endoscopic gastritis-like appearance. As for molecular characteristics, some markers, such as ki67, MUC2, and Wnt5a expression, are lower in cancer from patients in whom H. pylori has been eradicated. In terms of predictors, several Japanese studies have reported that severe endoscopic atrophy at eradication is a risk factor for gastric cancer development. Histologic intestinal metaplasia, especially in the corpus, and long-term use of proton pump inhibitors, are also reported as risk factors for gastric cancer after H. pylori eradication. These studies on the characteristics and predictors of gastric cancer development will become the cornerstone for establishing a novel surveillance program based on the gastric cancer risk stratification specific to H. pylori-eradicated patients.

关键词： gastric cancer eradication characteristic Helicobacter pylori predictor

Two-degree-of-freedom H-infinity control of combustion in diesel engine using a discrete dynamics model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Control Theory and Technology 2017年第2期15卷 109-116页

作者： Mitsuo hirata Sota ISHIZUkI Masasyasu SUZUkI Department of Electrical and Electronic Systems Engineering Utsunomiya University 7-1-2 Yoto Utsunomiya Tochigi 321-8585 Japan

This paper proposes an H-infinity combustion control method for diesel engines. The plant model is the discrete dynamics model developed by Yasuda et al., which is implementable on a real engine control unit. We introduce a two-degree-of-freedom control scheme with a feedback controller and a feedforward controller. This scheme achieves both good feedback properties, such as disturbance suppression and robust stability, and a good transient response. The feedforward controller is designed by taking the inverse of the static plant model, and the feedback controller is designed by the H-infinity control method, which reduces the effect of the trubocharger lag. The effectiveness of the proposed method is evaluated in simulations using the nonlinear discrete dynamics model.

关键词： Combustion control diesel engines H-infinity control two-degree-of-freedom control