Ngày tải lên: 02/08/2014, 09:21
History of the periodic table
... h thng tun hoàn Trang1 TÓM TT LCH S PHÁT TRIN CA BNG H THNG TUN HOÀN (The Young Vietnamese Chemistry Specialists) c dù Dmitri Mendeleev thng c coi là cha ca bng HTTH, nhng ... n 1858 mt s nhà khoa hc (Jean Baptiste Dumas, Leopold Gmelin, Ernst Lenssen, Max von Pettenkofer, and J.P. Cooke ) tìm ra rng nhng mi quan h hóa hc vt ra ngoài qui tc tam t. Trong...
Ngày tải lên: 22/08/2012, 09:18
... Mathematics, Nanjing University of Aeronautics and Astronautics Nanjing, 210016, PR China Full list of author information is available at the end of the article Abstract This paper deals with the periodic boundary ... Access Existence of positive solutions to periodic boundary value problems with sign-changing Green’s function Shengren Zhong 1 and Yukun An 2* * Correspondence: anykna@nuaa. edu.cn 2 Department of Mathematics, Nanjing ... function may changes sign. The existence result of positive solutions is established by using the fixed point index theory of cone mapping. Keywords: periodic boundary value problem, positive solution,...
Ngày tải lên: 21/06/2014, 01:20
báo cáo hóa học:" Research Article Quasigauge Spaces with Generalized Quasipseudodistances and Periodic Points of Dissipative Set-Valued Dynamic Systems" docx
... families of generalized quasipseudodistances, and we define three kinds of dissipative set-valued dynamic systems with these families of generalized quasi-pseudodistances and with some families of not ... families of generalized quasipseudodistances and define three new kinds of dissipative set-valued dynamic systems with these families of generalized quasipseudodistances and with some families of not ... Spaces with Generalized Quasipseudodistances and Periodic Points of Dissipative Set-Valued Dynamic Systems Kazimierz Włodarczyk and Robert Plebaniak Department of Nonlinear Analysis, Faculty of Mathematics...
Ngày tải lên: 21/06/2014, 11:20
báo cáo hóa học:" Research Article Existence of Periodic Solutions of Linear Hamiltonian Systems with Sublinear Perturbation" ppt
... developments of the second- order systems 1.1,see9. In this paper, we use this kind of condition to consider the existence of periodic solutions of first-order linear Hamiltonian system with a nonlinear ... pages doi:10.1155/2010/945421 Research Article Existence of Periodic Solutions of Linear Hamiltonian Systems with Sublinear Perturbation Zhiqing Han School of Mathematical Sciences, Dalian University of Technology, Dalian 116023, ... C u n 2α , 2.3 for every >0. In the proof of 2.2, we use the imbedding result 1.10, the finite dimensionality of E 0 , and Young inequality. In the proof of 2π 0 | u n | α | u n | dt ≤...
Ngày tải lên: 21/06/2014, 18:20
Báo cáo hóa học: " Research Article On the Spectrum of Almost Periodic Solution of Second-Order Neutral Delay Differential Equations with Piecewise Constant of Argument" ppt
... Spectrum of Almost Periodic Solution of Second-Order Neutral Delay Differential Equations with Piecewise Constant of Argument Li Wang and Chuanyi Zhang Department of Mathematics, Harbin Institute of ... solution of 1.1, then xtpxt − 1 are continuous at t ∈ R, which guarantees the uniqueness of solution of 1.1 and cannot be omitted. To study the spectrum of almost periodic solution of ... Dosly The spectrum containment of almost periodic solution of second-order neutral delay differential equations with piecewise constant of argument EPCA, for short of the form xtpxt − 1 qx2t...
Ngày tải lên: 21/06/2014, 20:20
Báo cáo hoa học: " Research Article Almost Periodic Solutions of Prey-Predator Discrete Models with Delay" pot
... solution zn of G such that z 0 s ∈ K for s ≤ 0, by the same argument for Σ-calculations with condition of K i as in the proof of Lemma 2.2. Then, the same argument as in the proof of Lemma 2.2 ... -translation number of fn, x. In order to formulate a property of almost periodic functions, which is equivalent to the above difinition, we discuss the concept of the normality of almost periodic functions. Namely, ... 2009 Recommended by Elena Braverman The purpose of this article is to investigate the existence of almost periodic solutions of a system of almost periodic Lotka-Volterra difference equations which...
Ngày tải lên: 21/06/2014, 20:20
Báo cáo hóa học: " Simple Systematic Synthesis of Periodic Mesoporous Organosilica Nanoparticles with Adjustable Aspect Ratios" pot
... further confirm the absence of the template and the presence of the organic groups. The sample has a type- IV isotherm with a BET surface area of 815 m 2 g -1 and pore volume of 0.827 cm 3 g -1 . The ... 4b) along with the HRTEM image confirms the periodicity of the mesopores in the NR sample. The NRs have a type-IV N 2 adsorption–desorption isotherm (Fig. 5b) with a BET surface area of 936 m 2 g -1 and ... organosilanes of the type (EtO) 3 Si–R–Si(OEt) 3 . The presence of the bridging organic groups allows for the use of these organosilanes as single-source precursor without the aid of inorganic...
Ngày tải lên: 22/06/2014, 00:20
Báo cáo hóa học: "Research Article Almost Periodic Solutions of Nonlinear Discrete Volterra Equations with Unbounded Delay" ppt
Ngày tải lên: 22/06/2014, 11:20
Báo cáo hóa học: " PERIODIC SOLUTIONS OF SECOND-ORDER LIÉNARD EQUATIONS WITH p-LAPLACIAN-LIKE OPERATORS" pot
Ngày tải lên: 22/06/2014, 22:20
Báo cáo hóa học: "Research Article Periodic and Almost Periodic Solutions of Functional Difference Equations with Finite Delay" pdf
Ngày tải lên: 22/06/2014, 22:20
Week 5 - Syntactic and semantic role of clause elements (with key) ppt
Ngày tải lên: 12/07/2014, 10:20
Báo cáo toán học: "Asymptotics of Permutations with Nearly Periodic Patterns of Rises and Falls" ppsx
Ngày tải lên: 07/08/2014, 08:20
Massera criterion for periodic solutions of differential equations with piecewise constant argument
Ngày tải lên: 11/03/2015, 07:57
Interaction between the elements with different degrees of smallness in nonlinear oscillating systems
Ngày tải lên: 08/04/2015, 15:28
SECTION 10: FOUNDATIONS TABLE OF CONTENTS [TO BE FURNISHED WHEN SECTION IS FINALIZED]
... karstic C10.4.2 The performance of a subsurface exploration program is part of the process of obtaining information relevant for the design and construction of substructure elements. The elements of the process that ... only in combination with information from direct methods of exploration, such as SPT, CPT, etc. to establish stratification of the subsurface materials, the profile of the top of bedrock and bedrock ... encountered. Depth of exploration should be: Great enough to fully penetrate unsuitable foundation soils, e.g., peat, organic silt, or soft fine grained soils, into competent material of suitable bearing...
Ngày tải lên: 06/09/2012, 15:57
Báo cáo y học: "Special considerations in the treatment of patients with bipolar disorder and medical co-morbidities"
... veterans received to that of all veterans. Among all veterans with diabetes and hypertension, those with a comorbid diagnosis of bipolar disorder (as well as those with diagnoses of anxiety disorder, ... lamotrigine. The triad of hypersensi- tivity includes fever, rash and internal organ involvement with onset of symptoms within 1 to 8 weeks of exposure. The frequency of the syndrome is estimated ... of these medications is not without risk, particularly when a patient with bipolar disorder also has comorbid medical illness. As the physician who likely has the most contact with patients with...
Ngày tải lên: 25/10/2012, 10:51
Báo cáo y học: "Replacement of cisplatin with nedaplatin in a definitive 5-fluorouracil/ cisplatin-based chemoradiotherapy in Japanese patients with esophageal squamous cell carcinoma"
... association of disease stage with the rates of CR and severe acute toxicities were analyzed with Fisher’s exact test. Circadian variations of plasma concentrations of 5-FU were analyzed with the ... characteris- tics of 56 ESCC patients are summarized in Table 1. The ratio of T1/T2/T3/T4 was 17/6/21/12, that of N0/N1 was 23/33, and that of M0/M1a was 45/11, resulting in a stage I/II/III/IVa ratio of ... average of 2 meas- urements. There was no significant difference between the 2 groups at each of the 4 cycles. Table 4. Plasma Concentrations of 5-Fluorouracil (5-FU) in the Patients with and without...
Ngày tải lên: 26/10/2012, 09:53
The 11th form non-english majors’ level of satisfaction with their reading comprehension lessons at phan boi chau specialized upper secondary school, nghe an
... profound effect on the strategies learners choose, with negative attitudes and beliefs often causing poor strategy use or lack of orchestration of strategies. Type of task: The nature of ... distributed, this narrow range of students prevent us, to some extent, from getting a full idea of the effect of CS in learning vocabulary at varying levels of proficiency. Therefore, we do not ... language ability from new beginners to those with the highest levels of proficiency. Such a study would help us to get a full idea of the impact of CS in learning vocabulary. - 42 - CHAPTER...
Ngày tải lên: 07/11/2012, 14:54