sánh tốc độ thực thi câu lệnh mongodb và mysql
Phương pháp đo đạc các thông số môi trường
... used their best efforts in preparing this book, they make no representations or warranties with respect to the accuracy or completeness of the contents of this book and specifically disclaim any ... 2008) There are three ATMOSPHERIC PRESSURE forces that act on this volume The force due to the pressure of the air contained on this volume is: F↓ = p↓ S, (1.4) where S is the base area of the ... breathing rate, anorexia (an eating disorder due to loss of appetite), and a loss of body weight with increasing height The principal symptoms of mountain sickness are dyspnea (difficult breathing),...
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Theoretical modeling of combustion characteristics and performance parameters of biodiesel in DI diesel engine with variable compression ratio
... results are validated and compared with the results computed in the simulation software Diesel-rk In this analysis the molecular formula for diesel and biodiesel are approximate, as C13.77H23.44 and ... fuel and air is a very complex process, and would require extensive modeling to fully capture In this work Wiebe function is used which some time is spelled Wiebe function to simulate the combustion ... software The details of the computed results are mentioned in [7, 14] Results and discussions In this study combustion parameter like cylinder pressure, peak cylinder pressure, combustion zone...
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Tài liệu PERFORMANCE TESTING OF OPTICAL FIBRE LINKS pptx
... termination is checked ensuring that “A” at the Near-End is “B” at the Far-End, and visa-versa This can be done by; visible light (eg a red light source) and inspecting opposite ends at the same ... must be done at both wavelengths and in both directions for 1/10GBE applications (See Item 16) This will check for any connector or splice defects, any cracked connectors, any accidental splicing ... LSPM Tester must have the correct Coupling Power Ratio for the cable under test Alternatively, this can be achieved by using a Mandrel Wrap on the Launch Cord for mode stripping during Reference...
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Báo cáo Y học: Processing, stability, and kinetic parameters of C5a peptidase from Streptococcus pyogenes pptx
... the surface of streptococci makes this secreted protease an interesting candidate for evaluation of its role in processing of C5a peptidase precursor To test this hypothesis, the S512A C5a peptidase ... sixfold reduction in kcat value and a threefold increase in Km value (Table 1) This could be caused by the lack of P9–P4 within 12-mer peptide and/or poor acceptance of amino acid residue(s) at specific ... with protein sequence analysis and Christopher Colocillo for synthesis of peptides used in this study This work was supported in part by NIAID grant AI2006 (to P C) REFERENCES Schechter, I & Berger,...
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GAIT PARAMETERS OF HEALTHY, ELDERLY PEOPLE pot
... elderly people tend to walk more slowly and that this speed reduction is due to a reduction in step length (Bullinger, 1996, 35; Crosbie and Vachalathiti, 1997, 6; Kurz and Stergiou, 2003, 348; ... mediolateral axis of the proximal segment This definition complements the usual frontal and transverse plane components To describe the position of the thigh, the usual plane angles (as flexion ... et al., 2004, 12; Kocsis et al., 2000, 1; Kocsis, 2002) Thigh rotation takes place at about the longitudinal axis of the distal segment In this research the knee angle is defined as the angle between...
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Comparing the Auditability of Optical Scan, Voter Verified Paper Audit Trail (VVPAT) and Video (VVVAT) Ballot Systems potx
... be included in this condition There were two levels of the rejection rate; high, in which of 120 ballots (6.6%) were invalid, and low, where only ballots (3.3%) were invalid The within-subjects ... believe this participant did not accurately report not-fully-corrected low vision Results for counting time are presented in Figure Obviously, VVPATs suffered from an extremely slow first count; this ... individual counts are neither rapid nor especially accurate This in and of itself is not particularly surprising However, the extent of this phenomenon has not been well documented Furthermore,...
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Báo cáo khoa học: "The Parameters of an Operational Machine Translation System" doc
... put to me several times as to who would read all of this material This question is an absurdity, since no one person would want to read all of this output under any circumstances, any more than ... community and through it the national security With the availability of this material in a form usable by the scientist in this country who has no capability in the Russian language, we shall be ... present time the rate-determining step in this enterprise will be the input step However, with the development of reading machines, it is our belief that this step will not long remain a problem...
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optics handbook of optical materials - webber
... Name Lithium germanate Lithium indium germanate Lithium indium molybdate Lithium indium oxide Lithium indium oxide Lithium indium silicate Lithium indium silicate Lithium indium tungstate Lithium ... Name Lithium vanadate Lithium vanadate Lithium yttrium borate Lithium yttrium borate Lithium yttrium fluoride (YLF) Lithium yttrium germanate Lithium yttrium oxide Lithium yttrium silicate Lithium ... germanate Lithium calcium indium fluoride Lithium calcium silicate Lithium carbonate (zabuyelite) Lithium chloride Lithium fluoride (griceite) Lithium gadolinium borate Lithium gadolinium borate Lithium...
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Báo cáo khoa học: "The Parameters of Conversational Style" ppt
... devices signal)ing meaning are prescribed by the culture, and which are chosen freely The answer to this seems to resemble, one level further removed, the distinction between cohesive vs expressive ... (Gumperz' term) on the need for community Other features co-occurring in the speech of many speakers of this style include fast rate of speech; fast turn-taking; preference for simultaneous speech; tendency ... avoid silence, which has a negative value Put another way, the unmarked meaning of silence, in this system, is evidence of lack of rapport To other speakers for example, Athabaskan Indians,...
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the application of ultrasound radiation to the synthesis of nanocrystalline
... benzyl alcohol (b) 1H NMR spectra of the final reaction solution (benzyl chloride) This NMR result demonstrates that in this reaction system benzyl chloride was present as a reaction product It is ... J.X Dai, S.F.Y Li, Z.Q Gao, K.S Siow, Novel method for synthesis of c-lithium vanadium oxide as cathode materials in lithium ion batteries, Chem Mater 11 (1999) 3086–3090 [25] C.G Granqvist, ... nm (Fig 2c) Side views of particles that are oriented vertically to the SEM grid reveal that the thickness is between and nm These HRSEM images prove that all the three nanomaterials have a high...
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Báo cáo khoa học: "Specifying the Parameters of Centering Theory: a Corpus-Based Evaluation using Text from Application-Oriented Domains" pot
... size of the corpus is of about 6,000 NPs For this study we used about half of each subset, for a total number of about 3,000 NPs, of which 103 are third person pronouns (72 in the museum domain, ... relations, marking up bridging references is quite hard; this was confirmed by, e.g., Poesio and Vieira (1998) As a result we did annotate this type of relations, but to achieve a reasonable agreement, ... according to the notion of ranking specified This information was the used to find violations of Constraint and Rule The behavior of the script that computes this information depends on the following...
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temporal profile of optical transmission probe for pulsed laser heating of amorphous silicon films
... the thin film thickness by *O.Ol pm, cause absolute transmissivity departures of about 40% from the values that correspond to the nominal 0.2 ,um amorphous silicon layer thickness used in this ... accounted for in the picosecond irradiation of thin c-Si films3 by assuming an average film temperature for the fitting of the measured optical properties In this study, the semiconductor film is treated ... terial optical properties at this wavelength is expected to be small It is reasonable to assume that no interference effects modify the local energy absorption in the thin film, as the case has...
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three dimensional mapping of optical near field of a nanoscale bowtie antenna
... generate periodic interference when their separation changes This interaction will slightly increase the background optical noise In this work, we focus on near-field measurements in the range ... of 132 kHz This number drops to 49 kHz in the 200 nm-distance curve (a factor of 2.7) In Fig 9(B), the corresponding theoretical peak intensity at the distance of 50 nm is 0.76 V/m This number ... such as tip-sample surface energies, Hamaker constants as well as environmental factors [20] In this paper, experimental results for the three-dimensional near-field optical and polarization-dependent...
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numerical study of optical nanolithography using nanoscale bow tie shaped nano apertures
... considerably, and the highest intensity is at the centre (r = 0) This is true for any distance greater than 12 nm for this bow-tie aperture In this work, imaging contrasts are calculated at two radius, ... equations In this work, the FDTD method is used to compute the near-field distributions of a bow-tie aperture The simulated geometry is shown in Fig 1, which consists of a 150-nm-thick aluminium ... aperture has the best contrast within 50 nm from the exit plane, and the contrast is less than that of a square aperture when the distance is larger than 50 nm This is because the bow-tie aperture...
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three dimensional mapping of optical near field of a nanoscale bowtie antenna
... generate periodic interference when their separation changes This interaction will slightly increase the background optical noise In this work, we focus on near-field measurements in the range ... of 132 kHz This number drops to 49 kHz in the 200 nm-distance curve (a factor of 2.7) In Fig 9(B), the corresponding theoretical peak intensity at the distance of 50 nm is 0.76 V/m This number ... such as tip-sample surface energies, Hamaker constants as well as environmental factors [20] In this paper, experimental results for the three-dimensional near-field optical and polarization-dependent...
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study of blueshift of optical band gap in zinc oxide (zno) nanoparticles
... blueshift is observed with decrease in particle size with respect to bulk ZnO (λ $ 376 nm; 3.3 eV) and this could be attributed to the confinement effects [16] Fig 1(a) and Fig indicate that ZnO nanoparticles ... porous coatings for dye-sensitized solar cell application: photoelectrochemical characterization Thin Solid Films 2012;520:1814–20 [5] Zhang Q, Xie C, Zhang S, Wang A, Zhu B, Wang L, et al Identification ... PB, Goering E, et al Amorphous grain boundary layers in the ferromagnetic nanaograined ZnO films Thin Solid Films 2011;520:1192–4 [14] Straumal BB, Myatiev AA, Straumal PB, Mazilkin AA, Protasova...
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báo cáo hóa học: " Effect of optical flow versus attentional strategy on gait in Parkinson''''s Disease: a study with a portable optical stimulating device" pptx
... optic flow provided by horizontal stripes on the ground may compensate for this specific visual deficit On the basis of this hypothesis, portable devices able to produce optic flow on the peripheral ... behavior of the PD subjects involved in this study during basal, attentional and optic flow conditions, an integrative model can be hypothesized, as shown in Fig In this model, the activation level ... demonstrated by PET studies [11], where consciousness level is higher The external cue could overcome this motor control deficit by activating the associative cortical areas in order to compensate for...
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Báo cáo hóa học: " Effective harvesting, detection, and conversion of IR radiation due to quantum dots with built-in charge" docx
... normal growth of layers, the substrate was rotated at 30 RPM to insure the uniform thickness of the layers The thickness of GaAs spacer between the QD layers was chosen large enough to minimize ... dimensions [13] This simulation tool self-consistently solves Schrödinger, Poisson, and current equations for electrons and holes The conduction and valence bands of the structures are defined within a ... increase recombination processes For this reason, the corresponding recombination losses are hardly compensated by the conversion of IR radiation To solve this problem, one should further suppress...
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