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Due to the increasing penetration of distributed energy in the distribution network and the opening of the electricity selling side in the power reform, it becomes more and more important to give full play to the flexibility of the demand side resources. Taking typical demand-side resources such as electric vehicles (EV), air conditioners (AC) a as examples, this paper takes into account the physical characteristics of the equipment and the influence of human and environmental factors, and uses the extreme energy scenario method to establish a universal virtual battery (VB) model to describe the flexibility of its resources. A set of standard parameters is used to quantify its schedulability flexibility. These resources optimize their own electricity consumption plan according to the change of TOU electricity price, reduce the electricity cost, and achieve the function of peak clipping and valley filling. At the same time, it hides the specific electricity consumption information of consumers, which protects the commercial privacy of users in the process of participating in the electricity market transaction and the operation of the power system to a certain extent.

The stable operation of H-bridge APF is based on the equilibrium of the DC side capacitors voltage. This thesis proposes a three-stage method for equalizing the voltage of capacitance. This control strategy significantly improves the pressure level of the APF. And in order to improve the accuracy of current output, on the basis of three layers of DC side control, the repetitive control is added. Finally, the voltage is controlled near the given magnitude. Then, the simulation results show that the three-stage method is very effective. which provides a basis for cascading APF applications to higher voltage levels.

Non-contact measurement of vital sign using FMCW radar is important to rescue missions and health care. It is very difficult to separate respiratory and heartbeat waveforms in the condition of random body movement (RBM). This paper presents a method in two conditions to compensate RBM for non-contact vital sign detection. Small movement in fixed range-bin, computing the energy and determine if it is to be scaled to reduce motion noise. To handle with outside range-bin RMB, range-bin tracking of movement calibration (RBTMC) method was proposed. The experimental result reveals that the proposed method is effective to reduce influence of RBM.

This paper first introduces the source of electric power big data and the application of three big data technologies on the demand side of smart grid. Then, the research status of load forecasting on the demand side of smart grid was summarized, and the neural network has been used to carry out load forecasting with examples. The results have illustrated the importance of influencing factors to accurate prediction results, and considering the new influencing factors brought about by the ubiquitous electric power Internet of Things, and the types of influencing factors were summarized. Finally, an energy Internet architecture for integrating the ubiquitous electric power Internet of Things and a strong smart grid in a big data environment was proposed, and the research route of the new influencing factors that need to be considered in the future demand side application of big data technology for electric demand forecasting was proposed.

Since the turn of the century, hundreds of image watermarking algorithms based on histogram features have been reported. However, all the existing watermark embedding was based on binary embedding, and they only store two situations on two continuous bins, i.e., {0,1}. In this paper, we improve the existing embedding algorithms and propose a novel high-capacity watermarking algorithm by using two bins histogram modification. The new algorithm is based on the ternary numeral system, and watermark information is divided into three cases {0,1,2}. Specifically, we extract the histogram of the cover image first, then select the appropriate embedding range by two predefined thresholds, and last form the bin groups contained reasonable number of pixels. In the generation of watermark, we transfer the watermark information into a digital string w=w_1 w_2... w_t, w_iIµ(0,1,2),i=1,2,...,t. In the embedding algorithm, if w_i=2, we will adjust the height of two continuous bins, and let b'/a'≥ T; if w_i=1, let a'/b'≥ T; if w_i=0, let |a'-b'|≤1, here a' and b' represent the height of the front and back bin, and T is the threshold. Experimental results show that the embedding capacity of the proposed watermarking algorithm is 60% higher than that of the existing algorithm. In addition, the new scheme can resist traditional geometric attacks.

The visually impaired are consistently faced with mobility restrictions due to the lack of truly accessible environments. Even in structured settings, people with low vision may still have trouble navigating efficiently and safely due to hallway and threshold ambiguity. Assistive technologies that are currently available do not provide door and door-handle object detections nor do they concretely help the visually impaired reaching towards the object. In this paper, we propose an AI-driven wearable assistive technology that integrates door handle detection, user's real-time hand position in relation to this targeted object, and audio feedback for "joy stick-like command" for acquisition of the target and subsequent hand-to-handle manipulation. When fully envisioned, this platform will help end users locate doors and door handles and reach them with feedback, enabling them to travel safely and efficiently when navigating through environments with thresholds. Compared to the usual computer vision models, the one proposed in this paper requires significantly fewer computational resources, which allows it to pair with a stereoscopic camera running on a small graphics processing unit (GPU). This permits us to take advantage of its convenient portability. We also introduce a dataset containing different types of door handles and door knobs with bounding-box annotations, which can be used for training and testing in future research.

The security of radio frequency identification (RFID) has become an increasingly severe issue. We propose a mutual RFID authentication secure protocol, based on the QC-MDPC McEliece type public cryptography in order to protect the information interaction security in wireless channel of RFID system. It owns low storage of public key, perfect efficiency of encryption & decryption, and high security. The security proofed for this novel protocol was given by using the reduction method, and the hardness of attacking protocol was reduced to the decoding hard problem of the linear codes. The performance results also show that compared to other authentication protocols, this protocol is more feasible for RFID system which has low cost and high efficiency.

Homomorphic encryption has numerous applications, which can directly calculate on encrypted data. In this paper, a simple variant of ElGamal is presented which supports arbitrary additions and one multiplication, similarly to the cryptosystem of Boneh, Goh, and Nissim (BGN). The construction adopts a bilinear pairing map to meet the multiplicative homomorphism. A confirmatory example is given to prove this cryptosystems homomorphism. In the additive homomorphic operation aspect, our scheme possesses a higher security than BGN's method. Obviously, it also offers a way of multiplying two cipher texts. Finally, a security analysis is shown to demonstrate that this variant of ElGamal cryptosystem satisfy CPA and IND-CCA security.

Threshold signature has important significance. However, the security and impeccable threshold group signature schemes are rarely. In this paper, a multivariate threshold group signature scheme is proposed. After the analysis, a conspiracy attack scheme which could offer forgery attacks to the signature system has been proposed. Then, the paper gives a new matrix multiplication definition and prime matrix concept, so the conspiracy attack immune group signature scheme is achieved. Analysis shows that the scheme not only can fundamentally withstand conspiracy and forgery attacks but the identity of signature members can be traced anonymously as well. Meanwhile, it can realize the unknown ability of group signature secret key by constructing a secure distributed key generation protocol, so the threshold group signature security is greatly enhanced.

To solve the problem that the information of removable storage device can be easily disclosed and not be monitored effectively, a scheme of U disk remote monitoring system in trusted computing environment is proposed, which uses dual authentication technology to ensure that the users and removable storage device double-way reliable, it stores the cipher text of its internal documents to avoid being disclosed. In the process of the authentication, using DAA (Direct Anonymous Attestation) technology can protect the identity of the trusted computers inside LAN. As is shown in the experimental results, with the same computing environment, the encryption and decryption speed of using 160-bit elliptic curve encryption technology is 5-8 times faster than using 1024-bit RSA, based on this result, a new scheme is designed with elliptic curve encryption technology, which can ensure the performance efficiency been improved definitely. Demonstrated by analyzing solution, the process of this new scheme is simple, its safety is powerful and its implementation efficiency is very high.

An essential component of threshold cryptography is to generate a distributed key based on univariate symmetric polynomials, where a constant fraction of the players can reconstruct the key. We, however, with rigorous proof of security, present a new distributed key generation (DKG) protocol, using bivariate symmetric polynomials. It is regarded as more efficient in computation, simpler and more flexible in applications, compared with other solutions.

The Internet brings freedom and happiness to people, but at the same time, it breeds a lot of viruses, pornography, violence information and rumors. To effectively filter out these info-junk and contents, content filtering technologies and related software products have emerged. This papre carries out comprehensive elaboration on the internet content filtering technology, software product development status, prospects and problems.

this paper carries out research on application filed, development trend of RSS and its application prospects in library and information.

it seems to be a trend that mobile phone is becoming the "portable newsstand" and "portable library" of the mordern people. Accordingly, the huge business opportunities related with mobile phone reading and mobile phone publishing applications have brought along the enthusiasm and initiative of network operators, literary sites, traditional publishers, authors, readers and other areas. This paper carries out a reseach on the characteristics of mobile phone literary and the efforts having made at home and abroad on mobile phone reading and the problems and obstacles still exsiting in this field.

The media environment has become another very important factor in the social environment and has become the most important “modeling power” in modern society. Profit orientation of media and market competitive pressures, as well as the extremely poor public media literacy endows media education with the necessity and urgency. This paper studies on the content of media literacy education and implementation strategies of media literacy education.

“Political education” concept done to the bone of the educational system and “officer's basis” thought in educational institutions and educational programs is the biggest obstacle hindering China's higher education credit system to further improve and implement.

Cultivating setback-resistant ability and happiness quality is becoming the weak point of cultivating volitional quality of the only child in modern times, which will directly influence his/her study, career as well as the happiness in the daily life and their whole life. Setback education carries out the study in a comprehensive and profound way on the ways and methods for cultivating happiness quality.