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In this paper, we study the problem of jointly estimating the optical flow and scene flow from synchronized 2D and 3D data. Previous methods either employ a complex pipeline that splits the joint task into independent stages, or fuse 2D and 3D information in an "early-fusion" or "late-fusion" manner. Such one-size-fits-all approaches suffer from a dilemma of failing to fully utilize the characteristic of each modality or to maximize the inter-modality complementarity. To address the problem, we propose a novel end-to-end framework, called CamLiFlow. It consists of 2D and 3D branches with multiple bidirectional connections between them in specific layers. Different from previous work, we apply a point-based 3D branch to better extract the geometric features and design a symmetric learnable operator to fuse dense image features and sparse point features. Experiments show that CamLiFlow achieves better performance with fewer parameters. Our method ranks 1st on the KITTI Scene Flow benchmark, outperforming the previous art with 1/7 parameters. Code is available at https://github.com/MCG-NJU/CamLiFlow., Comment: Accepted to CVPR 2022 (Oral)

China Academy of Engineering Physics Terahertz Free Electron Laser (CTFEL) works in the range of 0.7~4.2 THz. To expand the range below 0.1 THz, we developed a super-radiation terahertz (THz) source based on sub-picosecond electron beam behind CTFEL. The sub-picosecond electron beam was generated by velocity compression and then injected into undulator to provide THz wave. In this proceeding, the preliminary experimental results of super-radiation terahertz source were reported.

AA damage is a common defect caused by particle residue, charge accumulation, abnormal etch and so on. In the actual production process, on different products such as logical and CMOS, it is found that the AA damage with the same characteristics can be observed after POLY loop to show regular circular and annular distribution, but impact wafer cannot find the regularity. In this paper, for the same form AA damage defect occurring after the POLY Loop, according to the impact wafer condition, and the information such as the condition of the front film, the etch condition and the pretreatment mode are deeply investigated, and the reasons for the AA damage defect are obtained: insufficient etch selection ratio, high vacuum cavity operation in the front layer and the influence of particle. The experimental results show that the generation of this type of AA damage can be effectively improved by prohibiting the operation of high vacuum cavity, adopting the pretreatment of removing particle and selecting the high selection ratio when the process is established.

The PFOA surfactant (chemical structure: (polymer backbone)-C8F17) using in photoresist is forbade own to every country need protect environment, so the PFOA surfactant is replaced by non PFOA type (chemical structure: (polymer)-(CF2) n2 -CF3, n2

This paper provides the conceptualization and the development of IIUMSAT-2, a nanosatellite that is designed by a group of engineering students from International Islamic University Malaysia (IIUM) to simulate an actual satellite ability in space. IIUMSAT-2 is an integrated system comprising Mechanical Subsystem, Payload Subsystem, Communication and Data Handling Subsystem (CDH), Electrical Power Subsystem, and Ground Control System. The nanosatellite is developed based on the Space Mission Analysis and Design (SMAD) approach. IIUMSAT-2 is able to communicate at a 200m distance, transmitting pressure, temperature, altitude, humidity, location, attitude, and flight images to the ground station wirelessly.

Deterministic and stochastic approaches to handle uncertainties may incur very different complexities in computation time and memory usage, in addition to different uncertainty models. For linear systems with delay and rate constrained communications between the observer and the controller, previous work shows that a deterministic approach, the ℓ ∞ control has low complexity but can only handle bounded disturbances. In this article, we take a stochastic approach and propose a linear-quadratic (LQ) controller that can handle arbitrarily large disturbance but has large complexity in time and space. The differences in robustness and complexity of the ℓ ∞ and LQ controllers motivate the design of a hybrid controller that interpolates between the two: The ℓ ∞ controller is applied when the disturbance is not too large (normal mode) and the LQ controller is resorted to otherwise (acute mode). We characterize the switching behavior between the normal and acute modes. Using our theoretical bounds which are supplemented by numerical experiments, we show that the hybrid controller can achieve a sweet spot in the robustness-complexity tradeoff, i.e., reject occasional large disturbance while operating with low complexity most of the time.

More and more distributed generations (DGs) access to distribution networks makes the voltage regulation becomes more and more complicated. In order to solve the over limit problem of voltage, this paper proposes a method to optimize the reactive power and voltage of the distribution network by utilizing the reactive power capacity of energy storage. First, the influence of DG access on voltage and the reactive power capacity of energy storage are analyzed. Second, the coordination method of reactive power regulating resources in distribution network is proposed. Then, a voltage optimization model with energy storage participating in is established with the aim of minimizing the node voltage deviation in the distribution network and considering the equality and inequality constraints. Finally, the simulation results show that the proposed method can utilize the reactive power of energy storage and optimize the network voltage.

We report the radiation effect on fluorescence lifetime (FLT) of the bismuth and erbium co-doped fiber. For emission peak at 1138 nm, the FLT is increased at 0-0.3 kGy, and then is decreased at 0.3-3 kGy. However, for emission peak at 1534 nm of Er3+, its FLT is decreased all the way.