Autor: He, Wei - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Switching controller synthesis for discrete-time switched linear systems with average dwell time
Autorzy:: He, Wei
Xie, Wei
Zhang, Langwen
Tematy:: discrete-time switched linear systems
L2 performance
average dwell time
controller state reset
linear matrix inequalities; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/229372.pdf Link otwiera się w nowym oknie
Opis:: This paper addresses weighted L₂ gain performance switching controller design of discrete-time switched linear systems with average dwell time (ADT) scheme. Two kinds of methods, so called linearizing change-of-variables based method and controller variable elimination method, are considered for the output-feedback control with a supervisor enforcing a reset rule at each switching instant are considered respectively. Furthermore, some comparison between these two methods are also given.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Infraciliature and Cell Division of the Little Known Freshwater Ciliate Uroleptus cf. magnificus (Kahl, 1932) Olmo, 2000 (Hypotricha, Uroleptidae), and List of Published Names in Uroleptus Ehrenberg, 1831 and Paruroleptus Wenzel, 1953
Autorzy:: He, Wei
Shao, Chen
Shi, Xinbai
Berger, Helmut
Tematy:: China, Ciliophora, Dorsomarginalia, morphogenesis, ontogenesis, Rigidothrix, Stichotrichia; Pokaż więcej
Wydawca:: Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Powiązania:: https://bibliotekanauki.pl/articles/763702.pdf Link otwiera się w nowym oknie
Opis:: In 1988, we found a large (250–400 × 80–150 μm in protargol preparations) Uroleptus-like hypotrich in a freshwater pond in Harbin, China. We studied the morphology of non-dividers and the cell division using protargol impregnation. Since we disregarded live observations and due to the lack of a modern revision of the uroleptids, a final identification was not possible. A detailed comparison with the most similar limnetic Uroleptus-like hypotrichs and with Rigidothrix goiseri revealed that the Chinese population is very likely identical with Uroleptus magnificus [basionym Holosticha (Paruroleptus) magnificus Kahl, 1932], a very rare species possibly confined to limnetic, stagnant water bodies of the holarctic region. Besides the large size, main features of U. cf. magnificus are: (i) about 80 adoral membranelles; (ii) three or four inconspicuous transverse cirri; (iii) 5–8 dorsomarginal kineties; (iv) the oral primordium originates de novo left of the postoral midventral cirri; (v) the frontal-ventral-transverse cirri anlagen of the proter and the opisthe originate via primary primordia; (vi) the left frontal cirrus of the proter originates from the middle portion of the disorganizing parental paroral; (vii) the parental endoral becomes the undulating membrane anlage for the proter; and (viii) the frontoterminal cirri originate in the plesiomorphic manner, that is, from the rearmost anlage. A compilation reveals that 59 species, subspecies, etc. have been described in or assigned to Uroleptus and Paruroleptus, but only about 50% of them seem to be true uroleptids. Many species of this predominantly limnetic group are little known.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Study on Reclamation of CO2-hardened Sodium Silicate Used Sands by CaO Powder
Autorzy:: Lu, Jijun
Yang, Lei
Qian, Jiangbing
He, Wei
Wang, Huafang
Tematy:: sodium silicate sands
reclamation
orthogonal experiment
wet reclamation
dry reclamation
hardening of the sands
masa krzemianowo-sodowe
regeneracja
utwardzanie
eksperyment; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2174624.pdf Link otwiera się w nowym oknie
Opis:: Aiming at the problems of wet reclamation consuming a lot of water, dry (mechanical) reclamation having wear and power consumption, this paper to find suitable reclamation reagents to reduce the influence of harmful substances in used sodium silicate sands. By comparing the reclamation effect of CaO, Ca(OH)2 and Ba(OH)2 reclamation powder reagents, it was concluded that CaO had the best reclamation effect. Through the single factor experiment, the influence of CaO on the reclamation effect was explored: 1. addition amount of CaO; 2. the additional amount of water; 3. reclamation time. The orthogonal results showed that the CaO reclamation effect was the best when the amount of CaO was 1.5%, the amount of sodium silicate was 4.0%, the amount of water added was 6.0%, and the reclamation time was 12.0h. In this experiment, 82.2% carbonate and 75.0 % silicate in used sands can be removed. The microscopic analysis of the reclamation sands was carried out by scanning electron microscope (SEM); The surface was relatively smooth, without large area cracks and powder accumulation. Compared with the used sands, the instant, 24h ultimate, and residual strengths of the reclaimed sands were increased by 536.5%, 458.1%, and 89.8%, respectively, which was beneficial to the reclamation of the CO2 sodium silicate used sands.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: Effect of Methyl Silicone Oil to Moisture Resistance of Sodium Silicate Sands by Microwave Hardening
Autorzy:: Wang, Huafang
Gao, Xiang
Yang, Lei
He, Wei
Lu, Jijun
Tematy:: sodium silicate sands
microwave hardening
methyl silicon oils
moisture absorption
piaski sodowo-krzemianowe
hartowanie mikrofalowe
olej metylosilikonowy
wchłanianie wilgoci; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2126894.pdf Link otwiera się w nowym oknie
Opis:: The sodium silicate sands hardened by microwave have the advantages of high strength, fast hardening speed and low residual strength with the lower addition of sodium silicate. However, the sodium ion in the sands will absorb moisture from the atmosphere, which would lead to lower storing strength, so the protection of a bonding bridge of sodium silicate between the sands is crucial. Methyl silicone oil is a cheap hydrophobic industrial raw material. The influence of the addition amount of methyl silicone oil modifier on compressive strength and moisture absorption of sodium silicate sands was studied in this work. The microscopic analysis of modified before and after sodium silicate sands has been carried on employing scanning electron microscopy(SEM) and energy spectrum analysis(EDS). The results showed that the strength of modified sodium silicate sands was significantly higher than that of unmodified sodium silicate sands, and the best addition of methyl silicone oil in the quantity of sodium silicate was 15%. It was also found that the bonding bridge of modified sodium silicate sands was the density and the adhesive film was smooth, and the methyl silicone oil was completely covered on the surface of the sodium silicate bonding bridge to protect it.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: In vitro co-stimulation of anti-tumor activity by soluble B7 molecules
Autorzy:: He, Wei
Hu, Zhong-Bo
Liu, Fang
Feng, Xian-Qi
Zou, Ping
Tematy:: immunotherapy
tumor escape
gene fusion
recombinant fusion proteins; Pokaż więcej
Wydawca:: Polskie Towarzystwo Biochemiczne
Powiązania:: https://bibliotekanauki.pl/articles/1041178.pdf Link otwiera się w nowym oknie
Opis:: In order to investigate the anti-tumor activity of a soluble B7-1/immunoglobulin G fusion protein and explore an effective method to eliminate immune escape of tumor cells, a recombinant vector encoding this fusion protein was constructed and constitutively expressed in Chinese hamster ovary cells. After purification with protein G affinity chromatography, the soluble fusion protein was tested for bioactivity. Results showed that the fusion protein could significantly increase the density of B7-1 molecules on WEHI-3 cells, a mouse leukemia cell line. Through allogeneic mixed lymphocyte tumor cultures, it was demonstrated that, with the presence of the first signal, it could also significantly enhance T cell activation and killing activity against WEHI-3 cells and interleukin-2 secretion by activated mouse T lymphocytes. The conclusion can be drawn that the soluble B7-IgG fusion protein has a potent capacity to generate or enhance anti-tumor immune response in vitro, and its clinical value deserves further investigation.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Ab Initio Studies on Structural, Elastic, Thermodynamic and Electronic Properties of FeCrAs under Pressures
Autorzy:: He, De-Chun
Peng, Yong
He, Yong-Wei
Tematy:: 62.20.de
65.40.Ba
65.40.De
72.15.-v; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1400506.pdf Link otwiera się w nowym oknie
Opis:: The structural, elastic, thermodynamic and electronic properties of nonmetallic metal FeCrAs are studied within density function perturbation theory. The thermodynamic properties of FeCrAs were deduced based on phonon frequencies within the framework of the quasiharmonic approximation. The calculated elastic modulus under various pressures indicates that FeCrAs is mechanically stable under pressure. The pressure-dependence of bulk and shear modulus, transverse and longitudinal sound velocities V (i.e. $V_{S}$ and $V_{L}$), elastic Debye temperature $\Theta_{E}$ of FeCrAs have also been investigated. The calculated values of B/G indicate that FeCrAs presents high ductility under pressure. However, it is interesting that the value of B/G reaches a maximum under 40 GPa and almost remains unchanged when the pressure is above 70 GPa. The calculations show that the heat capacity $C_{V}$ of this material is close to the Dulong-Petit limit 3R (about 224.61 J $mol^{-1} K^{-1}$) at high temperature regime. The analysis of electronic properties find that as the pressure increases, the absolute value of charge for As and Fe atom increases while Cr remains nearly a constant, indicating that the mechanic properties of FeCrAs under pressure should be mostly attributed to the interaction between Fe and As atoms.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Bridge builders of one belt one road ‘Why, what and How’ of the AIIB and SRF
Autorzy:: Wei, He
Tematy:: B&R initiative
development finance
AIIB
SRF; Pokaż więcej
Wydawca:: Fundacja Instytut Nauki o Polityce
Powiązania:: https://bibliotekanauki.pl/articles/531259.pdf Link otwiera się w nowym oknie
Opis:: The history of AIIB and SRF is shorter than most of institutes, however so far the two institutes have earned their reputation through business development, and enhanced the confidence of world to B&R initiative. The key hypothesis of this paper is that the two institutes are not some kinds of economic weapons invented to destroy existing world order but new organizations to improve cooperation of countries. The AIIB and SRF are welcomed widely especially by the members in core region of B&R initiative for several reasons. First, they play indispensable role as the public financing institutes, separately being classed as MDB (multilateral development bank) and SWF (sovereign wealth funds) ,both are important for Sustainable development investments .Second , they may help to transfer experiences of China and other fast growing countries to undeveloped countries. The third and may be the most important point is, the two institutes may help more cooperation to be realized following B & R initiative. The missions and functions of the two institutes are fostering sustainable development, promoting regional cooperation, and decreasing the barrier of infrastructure financing. By provide debt financing and capital financing respectively, the two institutes may satisfy different customers with demands of the infrastructure financing in the region. With the transparency process/governance, the two institutes will act not only new pools of development financing in belt and road region, but also a promoter and organizer of development financing industry, which may bring more opportunities to the countries in the region, and improve both intergovernmental and non-GOV cooperation to boost infrastructure financing. The scale of the business of the two institutes has been increased apparently since founded, mainly attributed to regenerative feedback effect caused by multi-win strategy, and the unique position pegged with one belt one road initiative. One interesting thing for IR scholars is , the two new institutes, as long as China the initiator of B & R initiative, have been doubted by some countries while embraced by some others, for being labeled as challengers of the existing world order. This may remind scholars the metaphor of the trap of Thucydides: the trap did exist for those who thought the threat was there and tried to prevent it happened.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Flotation separation of quartz from phosphorite using an imidazole ionic liquid collector and its adsorption mechanism
Autorzy:: Zhao, Yuanyuan
Xu, Wei
Mei, Guangjun
Yu, Mingming
Yang, Siyuan
He, Zhan
Tematy:: reverse flotation
imidazole ionic liquid
desilication
phosphorite
quartz; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/2146857.pdf Link otwiera się w nowym oknie
Opis:: In this study, an imidazole ionic liquid (dodecyl-tri-methylimidazolium chloride) was employed as a collector to separate quartz from phosphorite. The micro-flotation experiments of a single mineral found that it had selective collecting ability for quartz than phosphorite. Mixed mineral flotation experiments confirmed that efficient separation results could be obtained using the imidazole ionic liquid as the collector. A concentrate with a 31.44% grade of phosphorite could be obtained with a 0.285 kg/Mg collector dosage at neutral pH, which was much better than the traditional collector dodecylamine. The adsorption mechanism of the imidazole ionic liquid on the surface of phosphorite and quartz was investigated by contact angle and zeta potential measurements, Fourier transform infrared and X-ray photoelectron spectroscopy analyses. These results showed that the adsorption of imidazole ionic liquid at the quartz surface was stronger than that of phosphorite, and the collector adsorbability difference between quartz and phosphorite resulted in the efficient flotation separation. Consequently, the dodecyl-tri-methylimidazolium chloride salt is an effective collector for reverse flotation of quartz from phosphorite.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Cardiovascular outcomes and variability in plasma lipid levels across body mass index categories : the ARIC study
Autorzy:: Chen, Chang
Wu, Dexi
He, Jiangui
Zhou, Yuanyuan
Wu, Yuzhong
Wei, Fang-Fei
Staessen, Jan
Yu, Zhongping
He, Xin
Liu, Chen
Xu, Tianyu
An, De-Wei
Dong, Yugang
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: Removal of chromium and strontium from aqueous solutions by adsorption on laterite
Autorzy:: He, Yong
Chen, Yong-Gui
Zhang, Ke-Neng
Ye, Wei-Min
Wu, Dong-Yu
Tematy:: adsorption
isotherms
chromium
strontium
laterite; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/204768.pdf Link otwiera się w nowym oknie
Opis:: To investigate the adsorptive properties of a local laterite deposited in Chenzhou, Hunan province, China, the adsorptive properties of the natural laterite were investigated by batch technique in this study. The effects of contact time, pH, ionic strength, temperature, and the concentration on adsorption properties were also analyzed. The obtained experimental results show that the main mineral composition of laterite is kaolinite and montmorillonite. The adsorption process achieved equilibrium within 60 minutes and 90 minutes for Sr(II) and Cr(VI), respectively. The adsorption capacities for Cr(VI) and Sr(II) by the laterite were about 7.25 mg·g^-1 and 8.35 mg·g^-1 under the given experimental conditions, respectively. The equilibrium adsorption data were fitted to the second-order kinetic equation. The adsorption capacity for Sr(II) onto the laterite increased with increasing pH from 3–11 but decreased with increasing ionic strength from 0.001 to 1.0 M NaCl. The Sr(II) adsorption reaction on laterite was endothermic and the process of adsorption was favored at high temperature. Similarly, the adsorption capacity for Cr(VI) onto the laterite increased with increasing pH from 3–11, however, the ionic strength and temperature had an insignificant effect on Cr(VI) adsorption. The adsorption of Cr(VI) and Sr(II) was dominated by ion exchange and surface complexation in this work. Furthermore, the Langmuir and Freundlich adsorption isotherm model was used for the description of the adsorption process. The results suggest that the studied laterite samples can be effectively used for the treatment of contaminated wastewaters.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Informacja

Wyszukujesz frazę "He, Wei" wg kryterium: Autor