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The car-hailing platform based on Internet of Vehicles (IoV) technology greatly facilitates passengers’ daily car-hailing, enabling drivers to obtain orders more efficiently and obtain more significant benefits. However, to match the driver closest to the passenger, it is often necessary to process the location information of the passenger and driver, which poses a considerable threat to privacy disclosure to the passenger and driver. Targeting these issues, in this paper, by combining blockchain and Paillier homomorphic encryption algorithm, we design a secure blockchain-enabled IoV scheme with privacy protection for online car-hailing. In this scheme, firstly, we propose an encryption scheme based on the lattice. Thus, the location information of passengers and drivers is encrypted in this system. Secondly, by introducing Paillier homomorphic encryption algorithm, the location matching of passengers and drivers is carried out in the ciphertext state to protect their location privacy. At last, blockchain technology is used to record the transactions in online car-hailing, which can provide a security guarantee for passengers and drivers. And we further analyze the security and performance of this scheme. Compared with other schemes, the experimental results show that the proposed scheme can protect the user’s location privacy and have a better performance. [ABSTRACT FROM AUTHOR]

With the increasing use of distributed electric vehicles (EV), energy management in the Internet of vehicles (IoV) has attracted more attention, especially demand response (DR) management to achieve efficient energy management in IoV. Therefore, it is a tendency to introduce distributed energy such as renewable energy into the existing supply system. For optimizing the energy internet (EI) for IoV, in this paper, we introduce blockchain into energy internet and propose a secure EI scheme for IoV based on postquantum blockchain, which provides the new information services and an incentive cooperation mechanism for the current energy IoV system. Firstly, based on the principles of constructing a short lattice basis and preimage sampling, a lattice signature scheme is proposed and used in blockchain for authentication, which provides anti-quantum security. Secondly, we design the EI based on the post-quantum blockchain model. Lastly, based on this model, we design a secure EI scheme for IoV based on post-quantum blockchain. Through our analysis and experiment, this new scheme can increase the efficiency of energy utilization and enrich EI’s application in IoV. In particular, we further illustrate and analyze its performance. It is shown that EI based on post-quantum blockchain is more secure and efficient in information communications and energy trading. [ABSTRACT FROM AUTHOR]

The advantages of genetically modified food are gradually highlighted because of the rapid development of modern transgenic technology. The trade proportion of genetically modified food in international trade products is increasing. Till now, legal regulations concerning the international trade of genetically modified food are still contradictory and conflicting, and a series of initiated legal issues about the international trade of genetically modified food becomes more acute. As a great power of transgenic crops planting, China should fully learn from the trade disputes of genetically modified food, perfect laws such as the safety management, approval and identification of import and export, accelerate the development of transgenic technology, and strengthen the mutual benefit and collaboration of the developing countries, thus to gain a strong competitive position in international trade and maintain the fundamental interests of China better. [ABSTRACT FROM AUTHOR]

Active magnetic levitation control system is an open-loop, unstable, complex, nonlinear and strong coupling control system, which can not achieve good control effect by using conventional PID controller. Therefore, the fractional order PIαDβ controller is used in active magnetic control system. The integer order of conventional PID controller is extended to fractional order range, thus there are more two parameters α and β than conventional PID controller. The performance of controller is basically unchanged when the parameters of the fractional order PIαDβ controller change in the small scope, which can be seen that the fractional order PIαDβ controller has strong robustness. The simulation results show that the fractional order PIαDβ controller has good control effect. [ABSTRACT FROM AUTHOR]

A comprehensive evaluation index system is established in this study, and evaluation and comparison of resource and environmental carrying capacity from 2005 to 2012 are conducted from four aspects, namely, land, water resource, transportation and environment. Research results show that from 2005 to 2012, the carrying capacity of the 10 main urban agglomerations increased, except for the wing of Beijing and Tianjin urban agglomeration. A significant difference in carrying capacity was observed. Among the top 10 urban agglomerations, the resource and environmental carrying capacity of the eastern region is the highest, followed by that of the central region. The resource and environmental carrying capacity of the western region is the lowest. Traffic capacity, circular economy development level, water resource consumption, and industrial pollution emission are the main reasons for the difference in resource and environmental carrying capacity. [ABSTRACT FROM AUTHOR]

A new method for converting a microdroplet on a piezoelectric substrate into continuous fluid flow in microchannels is presented. An interdigital transducer with 27.5 MHz center frequency is fabricated on a 1280 yx-LiNbO3 piezoelectric substrate for exciting surface acoustic wave. A PDMS (Polydimethylsiloxane) microchannel is mounted on the piezoelectric substrate. One end of the microchannel is connected with water absorbing paper, while the other end of the microchannel is in touch with a droplet to be converted. The surface acoustic wave is used for controlling the evaporation velocity of the fluid in the microchannel. Part of fluid in the droplet can be entered into the microchannel and transported there due to the evaporation and capillary effects. Red dye solution is used to demonstrate the conversion of the droplet and the transportation of the fluid in the microchannel. Results show that the droplet on the piezoelectric substrate can successfully be converted into continuous fluid. The flow velocity is increased with the power of the electric signal applied to the interdigital transducer. Average flow velocity is 0.0235μl/s when the power of the electric signal is 30.0dBm. The work is helpful for piezoelectric microfluidic devices for biochemical analysis. [ABSTRACT FROM AUTHOR]

By the directional distance function method, this paper calculated and compared the TFP (Total Factor Productivity) in 30 regions of China from 2000 to 2011 considering the environmental pollution. The study indicated that the TFP of each region has been ever-increasing whether consider environmental pollution factors, but the growth rate has been decreasing. The TFP has been in recession situation since the financial crisis in 2008. According to regional differences, the average annual growth rate of TFP in east was much higher than that of the central and west regions. Considering the environmental pollution, the average TFP in each region fell slightly. Comparing with the TFP without environment factor, the TFP in west region fell sharper, while it appeared double win of environment and economy development in the east region. [ABSTRACT FROM AUTHOR]

Single crystalline anatase TiO2 tetragonal nanosheet-array film on a transparent conductive fluorine-doped tin oxide (FTO) substrate was successfully prepared by hydrothermal method. The products were characterized with XRD, SEM, and transmission electron microscopy measurements. The formation mechanism of the tetragonal (001) TiO2 nanosheets is discussed and the effect of growth parameters, such as acidity, growth time, growth temperature, initial reactant concentration, and additives, are investigated. This work demonstrates a clean and effective route to the morphology-controlled preparation of large area single-crystalline TiO2 nanostructured array films on FTO glass. [ABSTRACT FROM AUTHOR]

The question of the objectivity of the clinical examination has been raised in relation to Western and non-Western medical systems. Western practitioners are often skeptical about Traditional Chinese Medicine (TCM), on the basis that its diagnostic variables and subcategories of disease appear subjective and not repeatable. We conducted a study investigating the reproducibility of individual diagnostic observations within three of the four diagnostic methods used in a TCM examination: inspection, palpation, and auscultation. Three TCM practitioners participated in the study, and examined 45 adults who had mild-to-moderate hypercholesterolemia but were otherwise healthy. Results indicated that while there are certain features of the TCM system that are highly objective and repeatable, such as detection of the presence of shen, character of breath sounds, and pulse speed, there are other features that are subjective and unreliable, such as color under the eyes and tongue body color. This poses a challenge for TCM practitioners to improve their clinical practice and demonstrates to Western medical practitioners that TCM does in part rest on a rigorous and objective empirical basis. [ABSTRACT FROM AUTHOR]

Background: Chinese medicine distinguishes itself from Western medicine in the differentiation of diseases according to underlying patterns of disharmony, or Chinese medicine (CM) syndromes. CM has its own clinical endpoints that are used as evidence of change in the body. Yet, relatively little is known about the reliability of CM diagnostic techniques, the final diagnosis of a CM syndrome, or the organizing principles used to reach a CM diagnosis such as the Eight Guiding Principles. Information about reliability of CM diagnosis has important implications for clinical practice and research, particularly if CM diagnostic variables or CM syndromes are to be incorporated into study designs. Design: An inter-rater reliability study was conducted with three CM practitioners to investigate the reproducibility of CM diagnosis according to the Eight Guiding Principles and Zang-Fu Theory. Forty-five (45) adults with mild hypercholesterolemia but who were otherwise healthy participated in the study. Results: Our results suggest that there is a reasonably good level of agreement between at least two practitioners on the dimensions of the Eight Guiding Principles. Level of agreement between at least two practitioners on CM syndrome diagnosis according to Zang-Fu Theory was very good for one syndrome only, that of Spleen qi deficiency. Conclusions: Further investigations are needed into the reliability of the CM diagnostic processes from the initial stage of data collection to the final CM syndrome diagnosis. [ABSTRACT FROM AUTHOR]