检索结果-南通市图书馆

Highly Stretchable,Compressible,Adhesive,Conductive Self-healing Composite Hydrogels with Sensor Capacity

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2020年第11期38卷 1221-1229,I0007页

作者： ji-Jun Wang Qiang Zhang xing-Xiang ji Li-Bin Liu State Key Laboratory of Biobased Material and Green Papermaking School of Chemistry and Pharmaceutical EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

The design and fabrication of conductive hydrogels with high stretchability,compressibility,self-healing properties and good adhesion remains a significant *** have fabricated composite hydrogels by random polymerization of acrylic acid(AA)and dopamine(DA)in the presence of multi-walled carbon nanotubes(MWCNTs).The π-π interaction between DA and MWCNTs makes MWCNTs stably and homogenously dispersed in *** fabricated PAA-PDA/CNT composite hydrogels possess relatively high mechanical strength(maximum Youngzs modulus:800 kPa)and can be stretched to 1280%strain and compressed to 80%*** multiple hydrogen bonding formed between functional groups of PAA-PDA and MWCNTs can effectively dissipate energy and quickly achieve *** composite hydrogels also show good adhesion and can easily adhere to various inorganic or organic *** addition,the hydrogel reveals stable strain sensitivity and can be used as skin sensors.

关键词： Hydrogels Self-healing Conductivity Sensor

A BOUNDARY ELEMENT METHOD FOR SMALL-AMPLITUDE VISCOUS FLUID SLOSHING IN COUPLE WITH STRUCTURAL VIBRATION

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Solida Sinica 1999年第1期12卷 9-21页

作者： Zang Yuelong ji xing Fuzhou Univ Dept Engn Mech Fuzhou 350002 Peoples R China Tongji Univ Dept Engn Mech Shanghai 200092 Peoples R China

A boundary element method is presented for the coupled motionanalysis of structural vibration with small-amplitude fluid sloshingin two-dimensional space. The linearized Navier-Stokes equations areconsidered in frequency domain and transformed into boundary integralequations. An appropriate fundamental solution for the Helmholtzequation with pure imaginary constant is found. The condition ofzero-stress is imposed on the free surface, and non-slip condition offluid particles is Imposed on the walls of the container. For rigidmotion models, the expressions for added mass and Added damping tothe structural motion equations are obtained. Some typical numericalexamples are Presented.

关键词： boundary element method fluid sloshing structural vibrations

HPR1000： Advanced Pressurized Water Reactor with Active and Passive Safety

在线全文

学校读者我要写书评

暂无评论

Engineering 2016年第1期2卷 79-87页

作者： ji xing Daiyong Song Yuxiang Wu China Nuclear Power Engineering Co. Ltd. Beijing 100840 China

HPR1000 is an advanced nuclear power plant(NPP)with the significant feature of an active and passive safety design philosophy,developed by the China National Nuclear *** one hand,it is an evolutionary design based on proven technology of the existing pressurized water reactor NPP;on the other hand,it incorporates advanced design features including a 177-fuel-assembly core loaded with CF3 fuel assemblies,active and passive safety systems,comprehensive severe accident prevention and mitigation measures,enhanced protection against external events,and improved emergency response *** verification experiments and tests have been performed for critical innovative improvements on passive systems,the reactor core,and the main *** design of HPR1000fulfills the international utility requirements for advanced light water reactors and the latest nuclear safety requirements,and addresses the safety issues relevant to the Fukushima *** with its outstanding safety and economy,HPR1000 provides an excellent and practicable solution for both domestic and international nuclear power markets.

关键词： HPRI000 Active and passive safety Advanced nuclear power reactor

Automorphisms on the Poset of Products of Two Projections

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

Acta Mathematica Sinica,English Series 2019年第8期35卷 1393-1401页

作者： Xin Hui WANG Guo xing ji School of Mathematics and Information Science Shaanxi Normal University

Let H be a complex Hilbert space with dim H ≥ 3 and B(H) the algebra of all bounded linear opera tors on H. Let ≤° be the diamond order on B(H), that is, for A, B ∈B(H), we say that A ≤° B if R(A)■ R(B), R(A^*)■ R(B^*) and AA^*A= AB^*A. Put Λ={PQ : P、Q ∈B(H) are projections}. In this paper, the relationship between Λ and ≤° is revealed and then the form of automorphisms of the poset (Λ,≤°) is given.

关键词： Partial order diamond order product of two projections automorphism

The Local Spectral Properties of Extended Hamilton Operators

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2018年第7期34卷 1110-1120页

作者： Jun Li SHEN Guo xing ji Alatancang College of Mathematics and Information Sciences Shaanxi Normal University Xi'an 710062 P. t~. China College of Computer and Information Technology He 'nan Normal University Xinxiang 453007 P. R. China College of Mathematics and Information Sciences Shaanxi Normal University Xi'an 710062 P. R. China Department of Mathematics Hohhot Minzu College Hohhot 010051 P. R. China

In this paper, we introduce the class of extended Hamilton operators and study various properties of this class. We examine the decomposability of extended Hamilton operators. In addition, we prove that an extended Ha... 详细信息

关键词： Extended Hamilton operator property (β) decomposability subscalar operator Weyl's theorem

Ring-opening Metathesis Polymerization of Cis-5-norbornene-endo-2,3-dicarboxylic Anhydride Derivatives Using the Grubbs Third Generation Catalyst

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2017年第1期35卷 36-45页

作者： ji-xing yang 任丽霞 yue-sheng li School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials Tianjin University Tianjin 300072 China

A series of cis-5-norbornene-endo-2,3-dicarboxylic anhydride （NDCA, M1） derivatives （M2-M4） with different types of nonpolar substituted groups were synthesized and characterized by 1H/13C-NMR and mass spectrometry （MS）. Ring- opening metathesis polymerization （ROMP） of these monomers using the Grubbs third generation catalyst （G3） generated high molecular weight polymers with much improved solubility compared with the NDCA＇s homopolymer. It was found that the solubility of these polymers increased with increased substituent＇s steric hindrance. The living polymerization of NDCA derivative containing the bulkiest substituent （M4） catalyzed by G3 in tetrahydrofuran was confirmed by the kinetic studies with low polydispersity indices （PDI）（〈 1.30）. By using sequential ROMP, well-defined diblock copolymers containing anhydride groups were synthesized.

关键词： Living polymerization Ring-opening metathesis polymerization Amphiphilic block copolymer Anhydridegroup

Clinical features of ankylosing spondylitis associated with acute anterior uveitis in Chinese patients

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2012年第2期5卷 164-166页

作者： Shu-xing ji, Huan Zou Daping Eye Hospital Institute of Surgery Research Daping Hospital Third Military Medical University Chongqing 400042 China Department of Ophthalmology 305 Hospital of Chinese PLA Beijing 100017 China

AIM: To characterize the clinical features, diagnosis, treatment and prognosis of uveitis associated with ankylosing spondylitis (AS) in Chinese patients. METHODS: Two hundred and three patients with uveitis associated with AS followed-up in the Third Military Medical University Daping Hospital between 2005 and 2010 were retrospectively evaluated in this study. Complete ophthalmological examinations were evaluated at baseline and during the follow-up period. The gender, age, follow-up time, mean frequency of uveitis onset, and accompanying eye examination findings, history, demographical parameters were reviewed. All the patients presented complete clinical and radiologic (sacroiliac, lumbar, dorsal and cervical spine, knee, ankle, shoulder, hip, elbow) evaluation. HLA-B27 typing was also searched. RESULTS: There were 203 patients diagnosed with AS associated welt's. All showed sacroiliac X-ray changes indicative of AS. There were 184 male and 19 female patients. The average age of patients was 35 +/- 12 (range 18-50). Mean follow-up period was 2.4 years (1-5 years). Acute anterior wets was the most common type of uveitis in both genders. 121 eyes presented unilateral involvement (55.2%), and 92 eyes presented bilateral involvement (45.3%) with onset alternately. 22 eyes occurred hypopyon, 16 eyes were found anterior vitreous cells, 7 eyes were noted reactive macular edema or exudation, 29 eyes presented posterior synechiae of iris, and 14 eyes presented cataract, 9 eyes presented secondary glaucoma, 2 eyes presented bend corneal degeneration and 1 eyes presented atrophy of eyeball. At the final visit, uveitis was well controlled in most patients. CONCLUSION: AS associated with uveitis in Chinese patients mainly manifests as acute anterior uveitis. A combination of corticosteroids with other mydriasis agents is effective for most AS associated with uveitis patients. In general, the prognosis is good in these cases.

关键词： HLA-B27 anterior uveitis acute anterior uveitis ankylosing spondylitis associated uveitis HLA-B27 associated uveitis

Effect of CD4^+CD25^+ regulatory T cells in the development of anterior chamber-associated immune deviation

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

International Journal of Ophthalmology(English edition) 2011年第1期4卷 19-25页

作者： Shu-xing ji, Pei-Zeng Yang Department of Ophthalmology Daping Hospital Third Military Medical University Chongqing 400042 China Uveitis Study Center Zhongshan Ophthalmic Center Sun Yat-sen University Guangzhou 510060 Guangdong Province China National Ophthalmic Research Laboratory Guangzhou 510060 Guangdong Province China

AIM: To investigate whether CD4(+)CD25(+) regulatory T (Treg) cells play a role in the development of anterior chamber-associated immune deviation (ACAID). METHODS: The dynamic changes in the frequency of CD4(+)D25(+) T cells, CD4(+)D25(+) FoxP3(+) T cells and CD4(+)CD25(+) PD-1(+) T cells from spleens of mice with ACAID were analyzed by flow cytometry. Foxp3 mRNA expression in purified CD4(+)CD25(+) T cells was analyzed using real-time PCR. The suppressive effect of purified CD4(+)CD25(+) T cells on the proliferation of CD4(+)CD25(-) T cells was evaluated by [H-3] thymidine incorporation. A blocking experiment was performed to further address the role of CD4(+)CD25(+) T cells in ACAID. The expression of IL-10 in purified CD4(+)CD25(+) T cells was evaluated by ELISA. RESULTS: Increased frequencies of CD4(+)CD25(+) T cells, CD4(+)CD25(+) Foxp3(+) T cells and CD4(+)CD25(+) PD-1(+) T cells were observed in ACAID. The CD4(+)CD25(+) T cells from mice with ACAID showed enhanced suppressive effect on the proliferation of CD4(+)CD25(-) T cells. Treatment of BALB/c mice with anti-CD25 antibody after injection of OVA into the anterior chamber significantly inhibited the induction of ACAID. Furthermore, purified CD4(+)CD25(+) T cells from ACAID mice secreted IL-10. CONCLUSION: Our results demonstrate that Treg cells are induced in the mice undergoing ACAID. These Treg cells may play a role in the development of ACAID.

关键词： CD4+CD25+ regulatory T cells Foxp3 ACAID IL-10 PD-1

AXISYMMETRIC BOUNDARY-VALUE PROBLEMS IN A PIEZOELECTRIC MEDIUM

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

Acta Mechanica Solida Sinica 1998年第2期11卷 104-112页

作者： Zheng Bailin Wang Zikun ji xing Tongji Univ Dept Engn Mech & Technol Shanghai 200092 Peoples R China Xian jiao Tong Univ Dept Mech Engn Xian Peoples R China

Based on the general solution of three-dimensional problems inpiezoelectric medium, with the method of Green's functins~[2],axisymmetric boundary-value problems are discussed. The purpose ofthis research is for analyzing the effective on mechanics andelectricity of the piezoelectric ceramics caused by voids andinclusions. The displacement, traction and electric Green's functionscorresponding to circular ring loads acting in the interior of apiezoelectric ceramic are obtained. A cylindrical coordinate systemis employed and Hankel transform are applied with respect to radialcoor- dinates. Explicit solutions for Green's functions are presentedin terms of infinite integrals of Lipshitz- Hankel type. By solving atraction boundary-value problem, the solution scheme is illustrate.

关键词： piezoelectric ceramics voids and inclusions Hankel transforms