检索结果-南通市图书馆

Mechanism-free control method of solar/thermal radiation pressure for application to attitude control

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Astrodynamics 2020年第3期4卷 205-222页

作者： Toshihiro Chujo Motoki Watanabe Osamu mori Tokyo Institute of Technology Tokyo152-8550Japan Aoyama Gakuin University Sagamihara252-5258Japan Japan Aerospace Exploration Agency Sagamihara252-5210Japan

Solar radiation pressure(SRP)impinging on spacecraft is usually regarded as a disturbance for attitude motion,but it can be harnessed to solve the very problem it *** SRP control is possible with solar radiation powered thin-film devices such as reflectivity control devices or liquid crystal devices with reflective *** radiation pressure(TRP)can likewise be used to solve flight attitude problems caused by SRP,TRP,or other *** on solar cells can be controlled by switching regulators under the control of them,resulting in temperature *** SRP/TRP controls are free from mechanisms,such as reaction wheels,and thus they do not produce internal *** addition,the magnitude of SRP/TRP torques is generally much smaller than internal disturbance torques produced by reaction wheels,which creates a potential for precision far beyond that achieved with mechanical *** paper summarizes how SRP/TRP can be used by means of numerical simulations of typical control *** usefulness of this mechanism-free attitude control is verified for future use on both Earth orbiting satellites and interplanetary spacecraft including solar sails.

关键词： solar radiation pressure(SRP) thermal radiation pressure(TRP) attitude control solar sail

Bandgap-tunable lateral and vertical heterostructures based on monolayer Mo1-xWxS2 alloys

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2015年第10期8卷 3261-3271页

作者： Yu Kobayashi Shohei mori Yutaka Maniwa Yasumitsu Miyata DepartmentofPhysics TokyoMetropolitanUniversityHachiojiTokyo192-0397Japan JST PRESTOKawaguchiSaitama332-0012Japan

The fabrication of heterostructures of two-dimensional semiconductors with specific bandgaps is an important approach to realizing the full potential of these materials in electronic and optoelectronic devices. Several groups have recently reported the direct growth of lateral and vertical heterostructures based on monolayers of typical semiconducting transition metal dichalcogenides （TMDCs） such as WSe2, MoSe2, WS2, and MoS2. Here, we demonstrate the single-step direct growth of lateral and vertical heterostructures based on bandgap-tunable Mo1-xWxS2 alloy monolayers by the sulfurization of patterned thin films of WO3 and MoO3. These patterned films are capable of generating a wide variety of concentration gradients by the diffusion of transition metals during the crystal growth phase. Under high temperatures, this leads to the formation of monolayer crystals of Mo1-xWxS2 alloys with various compositions and bandgaps, depending on the positions of the crystals on the substrates. Heterostructures of these alloys are obtained through stepwise changes in the ratio of W/Mo within a single domain during low-temperature growth. The stabilization of the monolayer Mo1-xWxS2 alloys, which often degrade even under gentle conditions, was accomplished by coating the alloys with other monolayers. The present findings demonstrate an efficient means of both studying and optimizing the optical and electrical properties of TMDC-based heterostructures to allow use of the materials in future device applications.

关键词： transition metaldichalcogenide Mo1-xWxS2 alloy heterostructure thin-film sulfurization photoluminescence stability

Autoimmune thrombocytopenia in response to splenectomy in cirrhotic patients with accompanying hepatitis C

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 2006年第8期12卷 1205-1210页

作者： Tetsuro Sekiguchi Takeaki Nagamine Hitoshi Takagi Masatomo mori Department of Medicine and Molecular Science Gunma University Graduate School of MedicineMaebashiJapan School of Health Sciences Gunma University Graduate School of MedicineMaebashiJapan

AIM： To estimate the contribution of autoimmune thrombocytopenia to hepatitis C virus-related liver cirrhosis （type C cirrhosis）, we evaluated the influence of splenectomy upon platelet-associated immunoglobulin G （PAIgG） levels and platelet numbers. METHODS： PAIgG titers and immune markers were determined in 24 type C cirrhotic patients with an intact spleen, 17 type C cirrhotic patients submitted to splenectomy, and 21 non-C cirrhosis with an intact spleen. RESULTS： Thrombocytopenia （PLT〈15×10^4/μL） in type C cirrhosis was diagnosed in all patients with an intact spleen, 8 patients submitted to splenectomy, and in 19 non-C cirrhosis with intact spleen. Elevated titers of PAIgG at more than 25.0 ng/107cells were detected in all cirrhotic patients except for one splenectomized patient. PAIgG titers （ng/10^7cells） were significantly higher in the type C cirrhosis with an intact spleen （247.9 ± 197.0） compared with the splenectomized patients （125.6±87.8） or non-C cirrhosis （152.4± 127.4）. PAIgG titers were negatively correlated with platelet counts in type C cirrhotic patients with an intact spleen. In comparison with the type C cirrhosis with an intact spleen, the splenectomized patients had a reduced CD4/CD8 ratio and serum neopterin levels. The spleen index （cm^2） was negatively correlated with platelet counts in the non-C cirrhosis, but not in the type C cirrhosis. CONCLUSION： Our data indicate that the autoimmune mechanism plays an important role in thrombocytosis complicated by HCV-positive cirrhosis. In addition, splenectomy may impair T cells function through, at least in part, a reduction of CD4/CD8 ratio, consequently suppressing PAIgG production.

关键词： Platelet-associated immunoglobulin G Autoimmune thromboo/topenia Liver cirrhosis Hepatitis C virus Splenectomy CD4/CD8 ratio

Uniqueness Theorems of Entire Functions with Shared-set in an Angular Domain

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2008年第11期24卷 1925-1934页

作者： Wei Chuan LIN Seiki mori Hong Xun YI Department of Mathematics Fujian Normal University Fuzhou 350007 P. R. China Department of Mathematical Sciences Faculty of Science Yamagata University Yamagata990-8560 Japan Department of Mathematics Shandong University Ji'nan 250100 P. R. China

There have been lots of papers on the uniqueness theory of entire functions concerning shared-sets in the whole complex plane. However, it seems that the uniqueness theory in an angular domain is not widely investigated. In this paper, we study the uniqueness of entire functions concerning shared-sets in an angular domain instead of the whole complex plane, and we supply examples to show that Theorem 1 is sharp.

关键词： shared-set uniqueness entire function angular domain

Rotational Motions Excited by Vertical Harmonic Motions

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Transactions of Nanjing University of Aeronautics and Astronautics 2018年第1期35卷 51-57页

作者： Tadokoro Chiharu Kadowaki Kei mori Hiroki Nagamine Takuo Department of Mechanical Engineering Saitama University Department of Mechanical Engineering Kyushu University

Rotation of a pair of wings was driven by the vertical harmonic motion of a pin inserted into the center hole of the *** elucidate the mechanism by which the rotational motion of the wings was excited,the relationship between the wings and the pin was examined by tracking their motions using both displacement measurements and high-speed *** motion modes occurred in this study were categorized into five types:slipping,rolling,jumping(without eccentricity),jumping(with eccentricity),and *** the case that the hole of the wings was located at a distance from the center of the wings,referred to as″with eccentricity,″the slipping,jumping(with eccentricity),and non-rotation modes *** experimental results showed that the mechanism of the jumping(with eccentricity)was different from that of the other modes(slipping,rolling,jumping(without eccentricity)),which are well known to be driven by the periodical reaction of the wings against the vertical vibration of the *** was found that the jumping(with eccentricity)was driven by the non-periodical force with the collision between the wing hole and the pin.

关键词： motion transformation rotation vibration hula-hoop

Efficacy of balloon-occluded retrograde transvenous obliteration, percutaneous transhepatic obliteration and combined techniques for the management of gastric fundal varices

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第24期12卷 3866-3873页

作者： Hirotaka Arai Takehiko Abe Hitoshi Takagi Masatomo mori Department of Gastroenterology Maebashi Red Cross Hospital 3-20-14 Asahi-choMaebashi 371-0014Japan Department of Medicine and Molecular Science Gunma University Graduate School of Medicine (previously known as the First Department of Internal Medicine Gunma University School of Medicine)MaebashiGunma 371-8511Japan

AIM： To evaluate the effect of three interventional treatments involving transvenous obliteration for the treatment of gastric varices, and to compare the efficacy and adverse effects of these methods, METHODS： From 1995 to 2004, 93 patients with gastric fundal varices underwent interventional radiologic embolotherapy at our hospital. Of the 93 patients, 75 were treated with the balloon-occluded retrograde transvenous obliteration （BRTO） procedure; 8 were with the percutaneous transhepatic obliteration （PTO） procedure; and 10 were with the combined BRTO and PTO therapy. A follow-up evaluation examined the rates of survival, recurrence and rebleeding of the gastric varices, worsening of esophageal varices and complications in each group. RESULTS： The BRTO, PTO, and combined therapy were technically successful in 81% （75/93）, 44% （8/18）, and 100% （10/10） patients, respectively. Recurrence of gastric varices was found in 3 patients in the BRTO group and in 3 patients in the PTO group. Rebleeding was observed in 1 patient in the BRTO group and in 1 patient in the PTO group. The 1- and 3-year survival rates were 98% and 87% in the patients without hepatocellular carcinoma （HCC） in the BRTO group, 100% and 100% in the PTO group, and 90% and 75% in the combined therapy group, respectively. CONCLUSION： Combined BRTO and PTO therapy may rescue cases with uncontrollable gastric fundal varices that remained even after treatment with BRTO and/or PTO, though there were limitations of our study, including retrospective nature and discrepancy in sample size between the BRTO, PTO and combined therapy groups.

关键词： Gastric varices Balloon-occluded retrogradetransvenous obliteration Percutaneous transhepaticobliteration Combined therapy

Reduction of virus burden-induced splenectomy in patients with liver cirrhosis related to hepatitis C virus infection

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 2006年第13期12卷 2089-2094页

作者： Tetsuro Sekiguchi Takeaki Nagamine Hitoshi Takagi Masatomo mori Department of Medicine and Molecular Science Gunma University Graduate School of Medicine MaebashiJapan School of Health Sciences Gunma University Graduate School of Medicine MaebashiJapan

AIM： To examine the hepatitis C virus （HCV） levels and immunological markers in cirrhotic patients after splenectomy. METHODS： HCV RNA titers as well as cellular and humoral immune markers were determined in 20 cirrhotic patients after splenectomy and in 32 cirrhotic controls with an intact spleen. RESULTS： Serum HCV RNA titers were lower in the splenectomized patients than in the controls （186 ± 225 × 10^3 copies/mL vs 541 ± 417×10^3 copies/mL, P〈0.01）. HCV RNA was judged to have been spontaneously eradicated in 4 splenectomized patients, but in none of the controls. Natural killer cell activity was higher in the splenectomized patients than in the controls （41.2 ± 19.3% vs 24.7 ± 15.3%, P〈 0.01）, and natural killer cell activity was negatively correlated to HCV RNA titers in the splenectomized patients except in those with serotype 2-related infection. The CEH/CD8 ratio was significantly lower in the splenectomized patients than in the controls. CONCLUSION： The findings suggest that splenectomy may diminish virus burden in cirrhotic patients with HCV infection at least in part, through augmentation of natural killer cell activity.

关键词： Hepatitis C virus Liver cirrhosis Natural killer cell Splenectomy

Beneficial effects of fucoidan in patients with chronic hepatitis C virus infection

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 2012年第18期18卷 2225-2230页

作者： Naoki mori Kazunori Nakasone Koh Tomimori Chie Ishikawa Department of Microbiology and Oncology Graduate School of MedicineUniversity of the RyukyusNishiharaOkinawa 903-0215Japan Nakasonekazu Medical Clinic NahaOkinawa 902-0062Japan Department of Psychiatry Naha City HospitalNahaOkinawa 902-8511Japan Transdisciplinary Research Organization for Subtropics and Island Studies University of the RyukyusNishiharaOkinawa 903-0213Japan

AIM:To evaluate the effects of fucoidan,a complex sulfated polysaccharide extract from marine seaweed,on hepatitis C virus(HCV) RNA load both in vitro and in ***:HCV-1b replicon-expressing cells were cultured in the presence of fucoidan obtained from Cladosiphon okamuranus Tokida cultivated in Okinawa,Japan,and quantified the level of HCV *** an open-label uncontrolled study,15 patients with chronic hepatitis C,and HCV-related cirrhosis and hepatocellular carcinoma were treated with fucoidan(0.83 g/d) for 12 *** clinical symptoms,biochemical tests,and HCV RNA levels were assessed before,during,and after ***:Fucoidan dose-dependently inhibited the expression of HCV *** 8-10 mo of treatment with fucoidan,HCV RNA levels were significantly lower relative to the *** same treatment also tended to lower serum alanine aminotransferase levels,and the latter correlated with HCV RNA ***,the improved laboratory tests did not translate into significant clinical *** had no serious adverse ***:Our findings suggest that fucoidan is safe and useful in the treatment of patients with HCVrelated chronic liver *** controlled clinical trials are needed to confirm the present findings.

关键词： Fucoidan Hepatitis C virus Replicon

Moxibustion Promotes Formation of Granulation in Wound Healing Process through Induction of Transforming Growth Factor-β in Rats

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 Journal of Integrative Medicine 2020年第1期26卷 26-32页

作者： Hiroshi Kawanami Hirohisa Kawahata Hiroko-Miyuki mori Motokuni Aoki Graduate School of Health Sciences Morinomiya University of Medical Sciences

Objective:To examine the effect of moxibustion on the wound healing process and its mechanism using a rat wound ***:Sixty male Sprague-Dawley rats were randomly divided into a sham-treated group(n=30,wound surgery only)and a moxibustion group(n=30,wound treated with moxibustion).Circular fullthick ness skin wounds were produced in *** was applied to the edge of wound and was continued on alternating days till 14 days after surgery,followed by measurement of wound *** of collagens,prolyl-4-hydroxylase(P4H)and transtorming growth factor-β(TGF-β)were evaluated by histochemical study and real-time polymerase chain ***:The size of the wound lesion was significantly reduced in rats treated with moxibustion as compared to that in sham-treated rats at 4-10 days after wounding(P<0.01).Moxibusti on stimulated mRNA expressi on of collage ns at 4 days(P<0.01),but not at 7 days,accompa nied by enhanced proliferation of P4H-positive *** importanee,expression of TGF-β in tissue from the wound lesio n treated with moxibusti on was sign ifica ntly in creased as compared to that in sham-treated rats at 4 days(P<0.01 or P<0.05),but not at 7 ***:The treatment with moxibustion promoted the wound healing process in the early phase through proliferation of fibroblasts and rapid formation of granulation,possibly mediated by induction of TGF-β which is a key molecule in the physiological process of wound *** can be expected to be effective as complementary treatment for intractable ulcers.

关键词： compleme ntary and alter native medicine moxibusti on wound healing granulation tran storming growth factor-β collagen