mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
High-performance pulse-width modulation AC/DC controller using novel under voltage lockout circuit according to Energy Star VI standard

This paper proposes a high-performance pulse-width modulation (PWM) AC/DC controller, which can drive a high-voltage (HV) 650-V power metal-oxide-semiconductor field-effect Transistor (MOSFET) in typical applications of adapters in portable electronic devices. In order to reduce the standby power consumption and improve the response speed in the start-up state, an improved under voltage lockout (UVLO) circuit without a voltage reference source or comparator is adopted. The AC/DC controller is fabricated using a 40-V 0.8-μm onepoly two-metal (1P2M) CMOS process, and it only occupies 1410 ×730 μm~2. A 12 V/2 A flyback topology for quick-charge application is illustrated as the test circuit, which is currently one of the most advanced power adapters in use. Test values show that the turn-on and the turn-off threshold voltages are 19.318 and 8.01 V, respectively. A high hysteresis voltage of 11.308 V causes the value of the power-charging capacitor to decrease to as low as 1 μF to reduce production cost. In addition, the start-up current of 2.3 μA is extremely small, and is attributed to a reduction in the system's standby power consumption. The final test results of the overall system are proven to meet the Energy Star VI standard. The controller has already been mass produced for industrial applications.
Efficient thermal analysis method for large scale compound semiconductor integrated circuits based on heterojunction bipolar transistor

In this paper, an efficient thermal analysis method is presented for large scale compound semiconductor integrated circuits based on a heterojunction bipolar transistor with considering the change of thermal conductivity with temperature. The influence caused by the thermal conductivity can be equivalent to the increment of the local temperature surrounding the individual device. The junction temperature for each device can be efficiently calculated by the combination of the semianalytic temperature distribution function and the iteration of local temperature with high accuracy, providing a temperature distribution for a full chip. Applying this method to the InP frequency divider chip and the GaAs analog to digital converter chip, the computational results well agree with the results from the simulator COMSOL and the infrared thermal imager respectively. The proposed method can also be applied to thermal analysis in various kinds of semiconductor integrated circuits.
Synergistic effect of total ionizing dose on single event effect induced by pulsed laser microbeam on SiGe heterojunction bipolar transistor

The synergistic effect of total ionizing dose (TID) on single event effect (SEE) in SiGe heterojunction bipolar transistor (HBT) is investigated in a series of experiments. The SiGe HBTs after being exposed to ~(60)Co γ irradiation are struck by pulsed laser to simulate SEE. The SEE transient currents and collected charges of the un-irradiated device are compared with those of the devices which are irradiated at high and low dose rate with various biases. The results show that the SEE damage to un-irradiated device is more serious than that to irradiated SiGe HBT at a low applied voltage of laser test. In addition, the g irradiations at forward and all-grounded bias have an obvious influence on SEE in the SiGe HBT, but the synergistic effect after cutting off the g irradiation is not significant. The influence of positive oxide-trap charges induced by TID on the distortion of electric field in SEE is the major factor of the synergistic effect. Moreover, the recombination of interface traps also plays a role in charge collection.
Superconductivity with peculiar upper critical fields in quasi-one-dimensional Cr-based pnictides

The discovery of superconductivity in quasi-one-dimensional Cr-based pnictides A_2Cr_3As_3 (A = alkali metals) has generated considerable research interest, primarily owing to their reduced dimensionality, significant electron correlations, and possible unconventional superconductivity. The upper critical field (Hc_2) provides important information on the superconducting pairing. In this paper, we first briefly overview the latest research progress on the Cr-based superconductors. Then, we introduce typical Hc_2(T) behaviors of type-II superconductors in relation with the pair-breaking mechanisms. After a description of the measurement method for Hc_2, we focus on the analysis of Hc_2 data, especially for the temperature and angle dependence, in K_2Cr_3As_3 crystals. The result indicates (i) an absence of Pauli-paramagnetic pair breaking for field perpendicular to the Cr_3As_3 chains, and (ii) a unique threefold modulation for the in-plane Hc2(f) profile. Finally we conclude with remarks on the possible unconventional superconducting pairing symmetry.
Radiation from finite cylindrical shell with irregular-shaped acoustic enclosure

In practical situations, large machinery is usually placed in an underwater vessel and changes the acoustic enclosure shape into an irregular one. The existence of machinery causes the difficulties in expressing sound transmission and radiation analytically. In this study, the sound radiation of a cylindrical shell excited by an internal acoustic source is modeled and analyzed. The cylindrical shell contains a machine modeled as a rectangular object, which is attached to a shell with a spring-mass system. The acoustic field of the cavity is computed by the integro-modal approach. The effect of object size on the coupling between acoustic mode and structural mode is investigated. The relationship between object volume and sound radiation is also studied. Numerical results show that the existence of objects inside vessels leads to a more effective coupling between the structure and acoustic enclosure than the existence of no objects in a regular-shaped cavity (i.e. empty vessel).
Design of multi-band metasurface antenna array with low RCS performance

In this paper, a multi-band metasurface (MS) antenna array with low radar cross section (RCS) performance is proposed and measured. Firstly, a 4×4 antenna array is composed of four 2×2 Jerusalem cross structure antenna arrays working at different frequency bands, which is aimed at enhancing the bandwidth effectively. Then, each antenna can be seen as a unit of MS in spite of adding the feeding structure. Based on phase cancellation principle, the MS is arranged into a chessboard configuration in order to realize wideband RCS reduction. Thus, excellent radiation and scattering characteristics are obtained simultaneously. Simulated and measured results indicate that this work provides a novel method to achieve bandwidth expansion as well as wideband RCS reduction of the antenna array.
Visualizing light-to-electricity conversion process in InGaN/GaN multi-quantum wells with a p-n junction

Absorption and carrier transport behavior plays an important role in the light-to-electricity conversion process, which is difficult to characterize. Here we develop a method to visualize such a conversion process in the InGaN/GaN multiquantum wells embedded in a p-n junction. Under non-resonant absorption conditions, a photocurrent was generated and the photoluminescence intensity decayed by more than 70% when the p-n junction out-circuit was switched from open to short. However, when the excitation photon energy decreased to the resonant absorption edge, the photocurrent dropped drastically and the photoluminescence under open and short circuit conditions showed similar intensity. These results indicate that the escaping of the photo-generated carriers from the quantum wells is closely related to the excitation photon energy.
Entropy of field interacting with two two-qubit atoms

We use quantum field entropy to measure the degree of entanglement for a coherent state light field interacting with two atoms that are initially in an arbitrary two-qubit state. The influence of different mean photon number of the coherent field on the entropy of the field is discussed in detail when the two atoms are initially in one superposition state of the Bell states. The results show that the mean photon number of the light field can regulate the quantum entanglement between the atoms and light field.
以发作性黑朦为主要表现的可逆性胼胝体压部综合征一例报道

可逆性胼胝体压部综合征(reversible splenium lesion syndrome,RESLES)是由学者Garcia-Monco等于2011年提出的一种非特异性脑炎或脑病,典型特征为胼胝体压部(splenium of corpus callusum,SCC)卵圆形、非强化病灶可随时间延长而完全消失。临床上RESLES较少见,好发于中青年,突然停用抗癫痫药、病毒感染、代谢紊乱等患者容易出现RESLES,其致病机制不明。RESLES的首发症状多样且不典型,目前尚没有被普遍认知。笔者现报道解放军总医院神经内科收治的1例RESLES患者的临床特点,并结合相关资料探讨其可能的发病机制。
Effects of mask-alignment error on point spread function for multi-level Fresnel diffractive lenses

The full aperture complex amplitude transmittance function of a multi-level diffraction lens with maskalignment errors was derived based on scalar diffraction theory. The point spread function(PSF) was calculated by the Kirchhoff diffraction integral. It is found that the radius of the Airy disk increases with the increase of the error in the direction of misalignment, and the image center shifts along the direction of misalignment. A fourlevel diffractive lens with a diameter of 80mm was fabricated, and its PSF and diffraction efficiency of +1st order were calculated and measured. The distribution of PSF is consistent with the calculated results, and the tested diffraction efficiency is slightly smaller than the calculated value; the relative error is 5.71%.
羊痘病毒中免疫抑制分子的发现以及在疫苗中的应用

山羊痘病毒(GTPV)是痘病毒科羊痘病毒属中的重要成员。羊痘病毒属有三个成员,GTPV、绵羊痘病毒(SPPV)和牛皮肤疙瘩病毒(LSDV)。三种病毒基因组高度同源,同源性高达95%以上。山羊痘和绵羊痘主要在亚洲以及非洲地区流行;牛皮肤疙瘩病(LSD)在我国尚无流行报道。但目前,已经在我国周边国家流行,给国内养牛业带来巨大威胁。目前,关于GTPV致病力以及免疫逃避机制的研究鲜有报道。已经有大量的文献证明,在痘苗病毒(VV)中有许多毒力基因可以抑制宿主天然免疫反应。包括可以影响细胞因子的释放、NF-κB信号通络、细胞凋亡等。这些基因的存在会影响病毒自身的免疫效果。VV作为载体已经得到广泛应用。为了便于筛选,tk基因常作为插入位点,但是tk基因的缺失会引起病毒在羊体内复制明显受限,进而影响疫苗免疫效果。
可溶性程序性死亡蛋白1(sPD- 1)与肿瘤关系的研究进展

程序性死亡蛋白1(PD-1)是免疫细胞表面一种细胞膜受体,在抑制T细胞免疫反应、维持机体免疫稳定性等方面发挥着重要作用。PD-1 mRNA可通过剪接形成可溶性PD-1(sPD-1),sPD-1对T细胞具有激活作用,并具有促进树突状细胞(DC)成熟的功能。肿瘤患者体内sPD-1增加,使其具有肿瘤生物标志物的潜能。另外,sPD-1与PD-1抗体一样可以与肿瘤表面PD-L1结合,进而阻止它与T细胞表面的PD-1相结合,发挥抗肿瘤功能,因而具有潜在的临床应用前景。
Membrane enhanced COD degradation of pulp wastewater using Cu_2O/H_2O_2 heterogeneous Fenton process

Both activity and stability of the catalyst can be improved in heterogeneous Fenton reaction,in particular,with no limitation for the working pH and no production of the sludge.In this work,a combination of catalyst Cu_2O and pore-channel-dispersed H_2O_2 is proposed to treat the pulp wastewater.Degradation degree of CODs in the wastewater was up to 77% in the ceramic membrane reactor using Cu_2O powder (2.0 g·L~(–1)) and membranefeeding H_2O_2 (0.8 ml·L~(–1)) within 60 min.Evolution of ·OH radical formation in the advanced oxidation process was analyzed with a fluorescent method.Utilization efficiency of H_2O_2was successfully enhanced by 10%with themembrane distributor.Further on,the catalyst recyclabilitywas evaluated in a five-cycle test.The concentration of copper ions being dissolved in the treated water was monitored with ICP.After Cu_2O/H_2O_2 (membrane) treatment the effluent is qualified to dischargewith COD concentration lower than 15 mg·L~(–1)with regard to the national standard GB25467-2010.
Ultralow-weight loading Ni catalyst supported on two-dimensional vermiculite for carbon monoxide methanation

Nickel-based catalysts represent the most commonly used systems for CO methanation.We have successfully prepared a Ni catalyst system supported on two-dimensional plasma-treated vermiculite (2D-PVMT) with a very low Ni loading (0.5 wt%).The catalyst precursor was subjected to heat treatment via either conventional heat treatment (CHT) or the plasma irradiation method (PIM).The as-obtained CHT-Ni/PVMT and PIM-Ni/PVMT catalysts were characterized with scanning electron microscopy (SEM),energy dispersive X-ray (EDX),X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS),inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM).Additionally,CHT-NiO/PVMT and PIM-NiO/PVMT catalysts were characterized with hydrogen temperature programmed reduction (H_2-TPR).Compared with CHT-Ni/PVMT,PIM-Ni/PVMT exhibited superior catalytic performance.The plasma treated catalyst PIM-Ni/PVMT achieved a CO conversion of 93.5% and a turnover frequency (TOF) of 0.8537 s~(–1),at a temperature of 450 °C,a gas hourly space velocity of 6000 ml·g~(–1)·h~(–1),a synthesis gas flow rate of 65 ml·min~(–1),and a pressure of 1.5 MPa.Plasma irradiation may provide a successful strategy for the preparation of catalysts with very low metal loadings which exhibit excellent properties.
子宫内膜淋巴上皮样癌1例

综上所述,子宫内膜淋巴上皮样癌是一种有别于子宫内膜癌其他组织类型的伴有大量淋巴细胞浸润肿瘤组织的未分化癌。本报道旨在让临床医师及病理医师认识并识别这种罕见的子宫内膜恶性肿瘤类型,提高术中冰冻病理检查结果的准确性,指导临床医师决定手术范围及后续治疗措施,避免误诊漏诊。子宫内膜淋巴上皮样癌发病率低,尚需收集并长期随访此类病例,提高对该病的诊断率,不断积累经验,探讨有效的治疗方案。
Real-time label-free analysis of the thermostability of DNA structures using GelRed

In biological systems, conformational transformations of nucleic acids play critical roles in genetic regulation. However, it remains a tricky task to design and optimize specific labeling strategies to track these changes. In this study, we exploited an intercalating fluorescent dye, GelRed, to characterize different DNA structures. We studied the correlation between fluorescence intensity and DNA structural properties. We showed that single-stranded DNAs with predicted self-folded secondary structures show much stronger fluorescence than those without such structures. For double-stranded DNAs, we observed that fluorescence intensity is positively correlated to their GC content. We also demonstrated that GelRed can be used to monitor DNA conformational changes upon temperature variations in real time. Based on these findings, we concluded that the fluorescence intensity of a GelRed-stained DNA structure has a good correlation with its thermostability in the form of a change in Gibbs free energy.
Structure and Raman scattering of Mg-doped ZnO nanoparticles prepared by sol–gel method

Mg-doped ZnO (Mg_xZn_(1-x)O, x = 0–0.10) nanoparticles were prepared by sol–gel method. Structural characterization by X-ray diffraction (XRD) indicates that the lattice parameter a increases and c decreases linearly with the increase in Mg content (x) due to the substitution of Mg~(2+) for Zn~(2+) in ZnO lattice. The blueshift of Raman modes is observed, impling the increase in force constant of atom vibration in the Mg_xZn_(1-x)O (MgZnO) nanoparticles. Resonant Raman spectra show longitudinal optical phonon overtones up to fifth order, revealing that the short part of the electron–phonon interaction is enhanced and long-range part is weakened by Mg doping.
Microstructure and interfacial strength of SiC fiber-reinforced Ti17 alloy composites with different consolidation temperatures

The interfacial reaction and titanium matrix microstructure in continuous SiC fiber-reinforced titanium matrix composite were investigated. By comparison of two samples actuated by 800 ℃ (in α + β dual-phase field) and 920 ℃ (in b single-phase field) consolidation, it can be concluded that tri-layer interfacial reaction regions consisting of fine TiCx/transition TiC_x/coarse TiC_x are formed in both two samples. In addition, the total thickness of reaction layer for composites prepared at 920 ℃ is thicker than that consolidated at 800 ℃, while fine TiC_x layer of 920 ℃ sample is thinner than that of 800 ℃ sample, which may be ascribed to the quick growth of PVD-Ti17 grain manufactured at 920 ℃. In addition, lower interfacial shear strength is obtained in 920 ℃ sample, which can be ascribed to the formation of too thick brittle TiC layer. The research in the work is expected to motivate further exploration for interface adjustment of titanium matrix composites.
Editorial for rare metals, special issue on solid state batteries

Energy storage devices based on organic liquid electrolyte are still suffered from safety issues. Therefore, developing the solid state batteries based on solid electrolytes is an inevitable choice because of the high safety. However, the practical applications of solid state batteries have been still suffered from some drawbacks, including the low ionic conductivity at room temperature, narrow electrochemical window, and weak chemical/electrochemical stability of solid-state electrolytes, the dendrite on metal anodes, and poor interfacial compatibility between electrodes and electrolytes.
Optimization of sintering parameters for fabrication of Ag-sheathed FeSe superconducting wires

Ag-sheathed Fe_(1.05)Se superconducting wires were fabricated with ex-situ powder in tube (PIT) process. Fe and Se powders with molar ratio of 1.05 were firstly mixed and sintered under 600 ℃ for 12 h to form precursor powders. Owing to the complex Fe–Se binary phase diagram, both superconducting tetragonal FeSe and nonsuperconducting hexagonal FeSe could be formed simultaneously during sintering. Aiming at the reduction of hexagonal FeSe phase content and higher superconducting phase volume, the influences of key parameters, including sintering time, cooling rate and heating rate, on the phase composition of sintered wires were systematically studied. Optimal sintering parameters are obtained, and the maximum tetragonal FeSe phase content of ~ 97% is achieved. Meanwhile, the effects of packing density of precursor powders on the phase composition of final wires were also discussed. Owing to the shorter length of diffusion path, more tetragonal FeSe was formed with higher packing density. The superconducting transition signal with critical temperature of ~ 7.5 K was obtained, which proved the effectiveness of our optimal sintering process.
Organosilicon-group-derived silica-ionogel electrolyte for lithium ion batteries

In order to avoid leakage problem caused by liquid electrolyte, a new ionogel electrolyte was developed by in situ immobilizing organosilicon-functionalized ionic liquid within a nanoporous silica matrix. The ionic liquid evenly coats on the surface of porous silica and fills in the silica framework pores with no strong chemical interaction. The ionogel electrolyte has the dual advantages of a silica solid support and a wide electrochemical stability window of ionic liquid (4.87 V vs. Li~+/Li). The half-cells assembled with this electrolyte and LiFePO_4 electrode have excellent performance at room temperature and 60 ℃. The Li/SiO_2-IGE/LiFePO_4 cell displays a discharge capacity of 129.1 mAh·g~(-1) after 200 charge/discharge cycles at room temperature.
Cycle stability of lithium/garnet/lithium cells with different intermediate layers

The garnet-type electrolytes such as Ta-doped Li_7La_3Zr_2O_(12) (LLZTO) have been viewed as the promising electrolytes for solid-state lithium batteries, but it exhibits problem of high interfacial resistance (1960 Ω·cm~2) and short circuit when being cycled in Li/LLZTO/Li cells at the current density above 0.5 mA·cm~(-2). Introduction of intermediate layers in between lithium and LLZTO is helpful for decreasing the interfacial resistance and suppressing the growth of lithium dendrites. In this work, three kinds of intermediate layers of Au, Nb and Si with the thickness of 100 nm were prepared. Although the interfacial resistance with the Au layer decreases from 1960 to 32 Ω·cm~2, the cells can only cycle for 0.67 h at 0.5 mA·cm~(-2), related to the Au peeled off from the LLZTO. The Nb layers lead to the initial interfacial resistance of 14 Ω·cm~2, while showing extension of cycle time to 50 h with the increase in interfacial resistance due to the formation of the resistive Li–Nb–O phase. The Si layers induce the interfacial resistance as low as 5 Ω·cm~2 and the cycles as long as 120 h, which is attributed to the improvement in electrical contact between Li and electrolyte as well as the maintenance of conductive interface during cycles.
Polymer electrolyte with composite cathode for solid-state Li–CO_2 battery

The rechargeable Li–CO_2 battery has attracted much attention for energy storage because of the high energy density and efficient utilization of greenhouse gas. However, it's still suffered by low safety issue of liquid electrolyte. Herein, a composite cathode consisting of CNTs and polymer electrolytes was fabricated by the insitu polymerization process for the polymer electrolytebased solid-state Li–CO_2 batteries. With the good dispersion of CNTs and polymer electrolyte, the composite cathode is covered by film-like discharge products Li_2CO_3. Furthermore, the Li–CO_2 battery shows high reversible capacity (~11,000 mAh·g~(-1)), excellent cycle stability (1000 mAh·g~(-1) for 100 cycles) under low charge potential (<4.5 V), and outstanding rate performances at room temperature, which are much better than those of liquid electrolyte-based battery. Therefore, the polymer electrolyte-based Li–CO_2 battery prepared by this strategy can be a promising candidate to meet the demands of high safety and high-performance energy storage devices.
NASICON-structured Na_(3.1)Zr_(1.95)Mg_(0.05)Si_2PO_(12) solid electrolyte for solid-state sodium batteries

Using stable inorganic solid electrolyte to replace organic liquid electrolyte could significantly reduce potential safety risks of rechargeable batteries. Na-superionic conductor (NASICON)-structured solid electrolyte is one of the most promising sodium solid electrolytes and can be employed in solid-state sodium batteries. In this work, a NASICONstructured solid electrolyte Na_(3.1)Zr_(1.95)Mg_(0.05)Si_2PO_(12) was synthesized through a facile solid-state reaction, yielding high sodium-ionic conductivity of 1.33 × 10~(-3) S·cm~(-1) at room temperature. The results indicate that Mg~(2+) is a suitable and economical substitution ion to replace Zr~(4+), and this synthesis route can be scaled up for powder preparation with lowcost. In addition to electrolyte material preparation, solid-state batteries with Na_(3.1)Zr_(1.95)Mg_(0.05)Si_2PO_(12) as electrolyte were assembled. A specific capacity of 57.9 mAh·g~(-1) is maintained after 100 cycles under a current density of 0.5C rate at room temperature. The favorable cycling performance of the solid-state battery suggests that Na_(3.1)Zr_(1.95)Mg_(0.05)Si_2PO_(12) is an ideal electrolyte candidate for solid-state sodium batteries.
Poly(ethylene carbonate)-based electrolytes with high concentration Li salt for all-solid-state lithium batteries

High-performance solid polymer electrolyte (SPE) has long been desired for the next-generation high energy density and safe rechargeable lithium batteries. A SPE composed of 80 wt% lithium bis(trifluoromethanesulfonyl) imide (LiTFSI), 20% poly(ethylene carbonate) (PEC) and a polyamide (PA) fiber membrane backbone was prepared by solution-casting method. This solid electrolyte exhibits quite high ionic conductivity and lithium ion transference number (t_+), and excellent mechanical strength. The as-prepared solid electrolyte shows good wettability to porous electrodes during cycles, which is beneficial to form ionically conductive phase throughout porous electrodes. All-solid-state LiFePO_4|Li cells assembled with the as-prepared solid electrolyte deliver a high initial discharge specific capacity of 125.7 mAh·g~(-1) and good cycling stability at 55 ℃ (93.4% retention at 1C after 200 cycles), and superior cycle performance. Outstanding electrochemical performance can be mainly ascribed to the improved ionic conductivity in the entire porous electrodes due to the good wettability of SPE.