Understanding and estimating satisfaction with search engines is an important aspect of evaluating retrieval performance. Research to date has modeled predicted on a binary scale, i.e., the searchers are either satisfied or dissatisfied their outcome. However, users' experience complex construct there different degrees satisfaction. As such, classification may be limiting. To best our knowledge, we first study problem understanding predicting graded (multi-level) We ex-amine sessions mined...

This paper presents a novel technique for single slope analog to digital converter (SSADC) suppress the rowwise noise in CMOS image sensor. A sample switch is used current-steering DAC reduce introduced by bias circuits, which will deteriorate characteristic of uniformity row direction. The can fix voltage biases current source when generating ramp avoid fluctuation time domain. correlated double sampling non-uniformity column-level ADCs. sensor prototype fabricated 110nm 1P3M process....

The Haihe River Basin is an important grain-producing area in China. It of great significance to explore and grasp the temporal spatial evolution drought for prevention disaster mitigation, water security, food security. In this study, based on standardized precipitation evapotranspiration index (SPEI), gravity center model, standard deviation ellipse, other methods, we analyzed from 1960 2020. results showed that during ∼ 2020, frequency had upward trend, light moderate occurred frequently....

Fe–N co-doped carbon catalyst has received increasing attention in the field of organic wastewater treatment because its unique structure and outstanding activity. However, reusability, catalytic activity, pH working range are still a great challenge for future application. Herein, novel αFe-HM@C-T was prepared by pyrolyzing mixture starch heme analyzed TEM, H2-TPR, XRD, BET, XPS, FTIR, Raman spectrum. Meanwhile, catalysts show highest performance due to abundant porous structure, higher...

User engagement in search refers to the frequency for users (re-)using engine accomplish their tasks. Among factors that affected users' visit frequency, relevance of results is believed play a pivotal role. While multiple work past has demonstrated correlation between success and user based on longitudinal analysis, we examine this problem from different perspective work. Specifically, carefully designed large-scale controlled experiment large commercial Web engine, which were separated...

AN ENHANCED BINARY ANTI-COLLISIONALGORITHM OF BACKTRACKING IN RFID SYSTEMX.-L. Shi, X.-W. Q.-L. Huang, and F. WeiNational Key Laboratory of Antennas Microwave TechnologyXidian UniversityXi’an 710071, P. R. ChinaAbstract—On the base binary search algorithm backtrack-ing, an enhanced anti-collision for radio fre-quency identification (RFID) system is presented in this paper. Withthe method transferring collision bit place ID thetag, proposed can improve efficiency sig-nificantly. Mathematical...

FeN 5 –C/G with the atomic dispersion of Fe–N sites was synthesized by a simple method and exhibited enhanced ORR activity in Zn–air batteries compared commercial 20% Pt/C.

In this paper, a 120 × 45 global shutter high speed time delay integration (TDI) CMOS image sensor with pipelined charge transfer pixel (PCT-pixel) is presented. Offset free and low noise signal accumulation are achieved by the PCT-pixel, novel layout also proposed to increase equivalent photosensitive area's fill factor of pixel. Due parallelism exposure method applied in sensor, which can eliminate nonsynchronous capturing problem. The TDI implemented 0.11-μm one-poly three-metal...

Single-atom catalysts (SACs), especially atomically dispersed Fe–N[Formula: see text]–C based SACs, hold great promise to replace Pt-based electrocatalysts for oxygen-reduction reaction (ORR). Currently, synthesizing high-activity ORR with text] site structures is still challenging due their high surface free energy, which leads easy migration and serious aggregation. Herein, we have designed a general graphene quantum dots (GQDs)-anchoring strategy synthesize single-iron-atom...

In this paper, a digital correlated double sampling (CDS)-based 10-bit Single-Slope Analog-to-Digital Converter (SS ADC) with error quantification and reset technique for CMOS image sensor is proposed. The SS ADC circuit block contains ramp generator, parallel counters comparators. (EQ) adopted to reduce the clock numbers that are counted in counter power consumption during whole digitizing process. To improve speed of ADC, introduced complete CDS (DDS) operation one ramp, 256 clocks saved...

Press-braking bending is widely applied in the manufacture of aircraft integral panels because advantages strong adaptability to different contours, simplicity tools, short manufacturing time and low process cost. However, a simulation requires long-time calculation consumes extensive computational resources. Considering factors that original model (ORM) an panel large press-braking used only for local area with heavy thickness practice, equivalent method analysis proposed. The simplified...

In this paper, two leakage-combating analog switches for low-speed sample-and-hold (S/H) circuits are proposed. conventional low-leakage switch, the potential drop along MOSFET is clamped to zero suppress sub-threshold leakage. Based on proposed can p-n junction reverse-biased leakage by clamping parasitic zero. The designed and fabricated with a 0.13 μm CMOS process in prototype chip. experiment results illustrate that order of magnitude leakages from only change 10−15 A 10−12 temperature...

In this paper, a kind of calibration method for two-tap indirect time-of-flight (ToF) image sensor is proposed, which aims to reduce the distance error caused by incomplete charge transfer. The phenomenon two-phase confusion due transfer makes serious impact on accuracy ToF imaging especially under high modulation frequency. Current researches effort improve ratio changing pixel structure or fabrication process. proposed obtains reducing frequency work timing. Then true photon-generated each...

This paper focuses on the rapid charge transfer of lock-in pixels in time flight 3D image sensors. Through principal analysis, a mathematical model potential distribution pinned photodiode (PPD) different comb shapes is established. Based this model, influence accelerating electric field PPD analyzed. The semiconductor device simulation tool SPECTRA applied to verify effectiveness and results are analyzed discussed. When width tooth narrow medium range, changes more obviously with increase...