Configuration information acquisition and matching in self-reconfiguring process of modular self-reconfigurable robots

Configuration information acquisition and matching are two important steps in the self-reconfiguring process of self-reconfigurable robots. The process of configuration information acquisition was introduced, and a self-reconfiguring configuration matching strategy based on graded optimization mechanism was proposed. The first-grade optimization was to search common connection between matching scheme and goal configuration. The second-grade optimization, whose object function was constructed in terms of configuration connectivity, was to search connnon topology according to the results of the first-grade optimization. The entire process of configuration information acquisition and matching was verified by an experiment and genetic algorithm （GA）. The result shows the accuracy of the configuration information acquisition and the effectiveness of the configuration matching method.

Study of Visual Information Acquisition Technology based on AGV Robot

Visual information acquisition is an important component of the AGV robot. The system adopts STM32F4 embedded application of the ARM Cortex-M4 kernel as the main control module,using shift algorithm to finish on a specific color piece of target tracking. For multi-sensor fusion of three methods,quaternion method is used to correct the attitude,the stability of AGV robot visual information acquisition and image clarity are improved.

Progressing of Quantum Tomography for Quantum Information Acquisition

In this paper we review a number of recent developments in the study of quantum tomography which is one of the useful methods for quantum state estimation and quantum information acquisition, having sparked explosion of interest in recent years. The quantum process tomography is also analyzed. At the same time, some success experiments and applications of quantum tomography are introduced. Finally, a number of open problems and future directions in this field are proposed.

Design and implementation of information acquisition system architecture for multi-sensor robots

A multi-layer controller architecture based on digital signal processor （DSP） and on-chip MCU was proposed for multi-sensor information acquisition system; it consisted of a data acquisition unit and a data fusion unit, and used a host controller to connect the two units into an integrated system. Compared with architectures of traditional acquisition system, this architecture had good openness and good adaptability of algorithms in hardware. To validate its feasibility, a small-scale prototype was cleverly designed, which adopted ADμCS12, TMS320F206 and 89C51 as controllers, and had 16-channel ADC and 12- channel DAC with high accuracy of 12-bit. The interfaces between different controllers were introduced in detail. Some basic parameters of the prototype were presented by board-level tests and by comparison with other two systems. The prototype was employed to provide on-line state measurement, parameter estimation and decision-making for trajectory tracking of wheeled mobile robot. Experimental results show that the prototype achieves the goals of data acquisition, fusion and control perfectly.

Wireless Power Generation Strategy Using EAP Actuated Energy Harvester for Marine Information Acquisition

The energy of a radio wave is reduced through the dispersion, the refraction and the absorption because the medium transferring the vibration of a radio wave is the seawater. In the end the reduced energy of a radio wave causes the reduced transmitting length for communication, the long postponed communication and the frequent error. The subsea communication for the marine environment monitoring which must overcome the weak points of the RF wave and the most practical method for the marine sensor network realization is to use the acoustic wave method, but the energy consumption rate of the acoustic wave communication method is about 100 times greater than the one of the RF wave method. So, the power supply of the sensor node in the marine sensor network system is the most important interest field. In this study, the sample which consists of an acrylic elastomer(VHB4905 film from 3M), conductible carbon grease(from MG chemical) and electric wire for the basic study of an energy harvesting strategy and technique using EAP actuator was fabricated, and the conductible carbon grease was used for an electrode. The characteristics of the fabricated sample were analyzed through the experiment. We also mixed carbon grease with aluminum powder for conductibility improvement, and the effect of the mixed electrode was confirmed through the conductivity measurement.

An Efficient Task Scheduling Method for the Unified Interface Platform of the Electric Information Acquisition System

Due to the large and frequent static data interaction between the Electric Information Acquisition System and the external business systems,researching on using limited server sources to do an efficient task scheduling is becoming one of the key technologies of the unified interface platform.The information interaction structure of the unified interface platform is introduced.Task scheduling has been decomposed into two stages,task decomposition and task combination,based on the features(various types and dispersed)of large static data.The principle of the minimum variance of the subtasks data quantity is used to do the target task resolving in the decomposition stage.The thought of the Greedy Algorithm is used in the task combination.Breaking the target task with large static data into serval composed tasks with roughly same data quantity is effectively realized.Meanwhile,to avoid the situation of the GA falling into the local optimal solution,an improved combination method has been put forward.Moreover,the new method creates more average composed tasks and making the task scheduling more effective.Ultimately,the effectiveness of the proposed method is verified by the experimental data.

Research on the Dynamic Evolution of Deformation Field and the Acquisition of Seismogenic Information Before Lijiang Earthquake With Ms7.0

By using the integral dynamic adjustment of the "segmentation rate," this paper processes the leveling repetition measurement data of the Dianxi(western Yunnan)area since the 1980s,makes the fitting of the velocity surface for vertical deformation with multi-surface function,and splits information of the vertical deformation field.The dynamic evolution of the deformation field and vertical deformation information norm-shear deformation,extension deformation,volumetric deformation,and quasi acceleration,which are the distribution characteristics of variation,are studied by using the information split before the Lijiang earthquake with MS7.0(February 3,1996)in the north of the Dianxi(western Yunnan)leveling network.The results indicate that in Dianxi(western Yunnan)area,the acute vertical differential movement of the large-scale deformation velocity high gradient belt and high information norm distribution in the Lijiang,Yongsheng,and its adjacent areas in the middle stage of the 1980s is the reflection

Correlational Study between the Information on English Middle Construction and Chinese EFL Learners'Acquisition of English Middle Construction

Less is known about the role that the information input may play in the acquisition of EMC,as such,the influence of the information input remains to be scrutinized.The present study,via quantitative analysis,aims to make a distinctive contribution to exploring this process.Four kinds of information on the six target English middle verbs were adopted:constraints on NP,constraints on AP,examples and all information on EMC.The results show that under the same conditions,examples can meet the demand of user's productive ability in a better way and help improve the production of the EMC.These findings are very informative for second language teaching and provide certain enlightenment for bilingual dictionary compilation.

Application of Information Processing Theory in Second Language Vocabulary Acquisition

Vocabulary acquisition is an intricate process,which has a close relationship with memory.In cognitive psychology,a large number of studies on memory system have been conducted based on the information processing theory,placing great value on second language learners’cognitive process.This study intends to probe into second language vocabulary acquisition from the perspective of information processing theory in hope to help learners acquire vocabulary more scientifically and efficiently.

Information gain based sensor search scheduling for low-earth orbit constellation estimation

This paper addresses the problem of sensor search scheduling in the complicated space environment faced by the low-earth orbit constellation.Several search scheduling methods based on the commonly used information gain are compared via simulations first.Then a novel search scheduling method in the scenarios of uncertainty observation is proposed based on the global Shannon information gain and beta density based uncertainty model.Simulation results indicate that the beta density model serves a good option for solving the problem of target acquisition in the complicated space environments.

Method of visional detecting MAG weld pool information

A theoretical analysis of the visional detecting weld pool information and image-getting mechanisms were presented. Four kinds of composite narrow-band filters based on three kinds of mechanism were adopted in consideration of short-circuiting transfer and spray transfer. After studying the ways for sensing the visional signals of the weld pool, the best filter window was obtained. From the window images with distinct weld pool area were acquired. In addition, image-getting mechanisms for passive light source to detect visional information of weld pool were explored, and then the characters of weld pool of MAG were analyzed.

Agricultural Credit Sources and Determinants of Credit Acquisition by Farmers in Idemili Local Government Area of Anambra State

The study is focused on agricultural credit sources and determinants of credit acquisition by farmers in ldemili local government area of Anambra State, Nigeria with specific objectives to： describe socio-economic characteristics of rural farmers; identify sources of agricultural credit available to rural farmers; determine socio-economic factors that influence agricultural credit acquisition of farmers; ascertain reasons for any credit misappropriation and identify problems that constrain farmers from agricultural credit acquisition. Ninety farmers were randomly selected by multi stage random sampling technique. Semi-structured questionnaire was used to elicit data for the study. Descriptive statistics and multiple regression model were used in achieving the objectives. Results indicated that 74.44% of respondents were males with a mean age of 45 years. Majority （76.67%） were married with large house hold sizes. Majority （93.33%） received different level of education, with sources of credit from friends/relatives （30.00%）, cooperative societies （43.33%）, money lenders （14.44%）, and cumulatively from formal sources （（12.22%）. The result of the multiple regression analysis revealed age, household size, membership of cooperative societies, marital status, education level, farm size and amount of loan repaid at varied signs and levels as significant predictors of amount of agricultural credit acquired by farmers. The most common reason given among the respondents （55.89%） of those who misappropriated acquired agricultural credit, was meeting nonfood needs of the household. The farmers encountered problems of high interest rate （78.89%）, lack of collateral （75.56%）, long distance from source of credit （50.00%）, poor harvest （37.78%）, moratorium （33.33%） and delay in loan approval/disbursement （44.44%） as constraints to acquire credit. The study recommends that the state government should pass policies aimed at providing free educative seminars to all illiterate farmers to teach them possible ways and methods of acquiring credit. To ensure mass attendance to such seminars, little incentives should be given to farmer participants.

Method of Carrier Acquisition and Track for HAPS

This paper emphasizes on the characteristics and schemes of carrier acquisition and track in high dynamic and high information-rate situation. Carrier acquisition model is analyzed theoretically and the design princi-ple of carrier acquisition is deduced and described clearly. An algorithm for carrier acquisition in high dy-namic and high information-rate situation is provided. This paper also proves the validity of the algorithm and design scheme in high dynamic and high information-rate situation.

Information acquisition system of multipoint soil surface height variation for profiling mechanism of seeding unit of precision corn planter

The emergence rate and vitality of maize are directly affected by the sowing depth,and the uniformity of this depth is an important performance indicator of a planter,while the effective soil surface height information acquisition is the prerequisite for ensuring the accuracy of sowing depth control.The soil surface height variation acquisition system of a precision corn planter often produces profiling errors when performing active profiling due to interference from ground debris.In this study,a multipoint soil surface height variation information acquisition system was investigated,which consists of a ranging sensor group and a microcontroller unit(MCU)using a data comparison and screening method.The structure and specifications of the ranging sensors were determined according to the soil surface height variation and debris size,and a nonessential profiling control program was developed.Performed tests on the information acquisition system indicated that the measurement accuracy of the system was 3 mm,and when advancing at a speed of 8 km/h,the accuracy of the profiling decision and the system stability were 97.1%and 94.1%,respectively,indicating that the system was capable of nonessential profile control.The designed ranging system could provide a reference for the design of a ground information acquisition system of precision planters with an active profiling mechanism.

Natural interface-mediated self-assembly of graphene-isolatednanocrystals for plasmonic arrays construction and personalized information acquisition

As Interface mediated self-assembly of nanocrystals provide excellent strategy for sensing,catalysis or photonics,the construction of innovative interfaces and development of versatile strategies for nanocrystal synthesis are urgently needed.Herein,latent fingerprints(LFPs),the most common markers for human identity,are used as naturally accessible interface for organization of graphene isolated nanocrystals(GINs).Excitingly,the selective adsorption of GINs on lipidic ridge provides a universal approach for the in-situ construction of the plasmonic arrays.Such system with intrinsic chrominance and Raman signal enables the high resolution colorimetric and surfaced-enhanced Raman spectroscopy(SERS)dual-mode imaging,which can detail the structures of the LFPs from 1st to 3rd level even the LFPs are shielded.Furthermore,the interface can be constructed on diverse materials by a simple finger-pressing process and the densely packed arrays can serve as superior SERS substrate for label-free,non-invasive acquisition of molecule information especially residues in LFPs.The combination of chemical composition with detailed structures efficiently recognizes the human identity and could help link it to a crime scene.Overall,the LFPs can act as natural platform for interface mediated localized assembly and personalized information acquisition for forensic science or precise medicine.

Information Acquisition: Fundamental and Non-Fundamental

We present a parsimonious information acquisition model in which two types of traders can produce either fundamental or non-fundamental information.Fundamental information is related to asset liquidation value,whereas non-fundamental information is related to the noise caused by traders'sentiment.Opening access to non-fundamental information increases the coordination possibilities among sentiment-informed traders and can yield two equilibrium-displaying properties:substitutability and complementarity.We find that the dominated mass of one type of informed trader can attenuate their information advantage,resulting in low ex ante expected utility associated with such traders.We further find that there is a crowding-out effect in information acquisition between the two types of informed traders,which offers some significant insights in explaining why bubbles burst when market sentiment is dominant.

灾难与重建中的信息力量——急性淋巴细胞白血病患儿家庭信息获取障碍与对策

因儿童罹患急性淋巴细胞白血病而遭受重创的家庭,往往难以及时获得足够的信息支持。深入研究这个群体的信息需求和信息行为,有望辅助医疗决策,拯救更多稚嫩生命,减轻病痛给家庭带来的恐惧、焦虑和无助,也能为信息职业者在该领域中发挥更大作用提供建议。文章对某相关群体进行历时两年的参与式观察,发现该群体面临着误导信息先入为主,信息来源良莠难判,需求多样、归因单一等信息获取障碍。为优化此类患儿家庭信息获取利用环境,需要公布权威信息、开放科研成果,创新科普资源、引导大众认知,打造信息平台、搭建沟通渠道,发挥图书馆功能、提供精细化健康信息服务。

量子传感(Ⅰ):基础理论与方法

作为当前三大核心量子技术之一的量子传感技术,是量子信息感知与获取的重要物理实现基础,也是发展历史最悠久、技术成熟度最高、实际应用范围最广、潜在应用最多的量子技术。文章是量子传感的第一部分,主要介绍量子传感的基础理论与方法。首先从理论上总结量子传感的定义及基本概念,指出量子传感“量子性”的由来,并从实际应用的角度,提出量子传感的技术外延以及分类依据;接着详细介绍了有关量子传感的基本实现架构,以及描述量子传感性能的核心技术指标,归纳了用于提高量子传感性能的物理原理及技术方法。

媒体报道如何影响并购重组知情交易:合流还是监督?

媒体报道既可能发挥积极的外部监督作用制约知情交易,也可能受到操纵而被信息知情人利用。本文收集2009—2022年A股上市公司并购重组数据,检验事前媒体负面报道倾向对并购重组中知情交易程度的影响。研究结果表明,并购重组首次公告日前媒体负面报道倾向越高,知情交易程度越低;媒体会通过增加诉讼风险和声誉渠道发挥治理作用。进一步分析表明,良好的公司治理环境能够强化媒体负面报道倾向对知情交易的影响;媒体发挥的治理功能在国有企业中相对较弱。事前分析师预测会提升市场整体知情交易水平并弱化媒体的功能。从媒体类型来看,网络媒体对于知情交易的约束作用大于纸媒。此外,媒体对知情交易的抑制效果在480日后不再存在。本研究对于发挥媒体监督作用、提升知情交易监管效率、保护投资者合法利益、维护资本市场公平具有一定的借鉴意义。

考虑消费者“时间偏好”的零售电商平台付费会员定价及信息获取策略

零售电商平台(以下简称“平台”)的会员制具有二次付费的特点,这种跨期决策会在一定程度上引发消费者的时间偏好心理行为。对于平台而言,获取消费者时间偏好信息有利于其准确刻画消费者购买会员的效用。本文在考虑消费者时间偏好影响的基础上,引入了平台向商家收取的佣金率内生和外生两种情形,在每种情形下分别构建了平台获取消费者时间偏好信息(M策略)模型和不获取信息(UM策略)模型。基于此,本文研究了平台的最优付费会员定价及信息获取策略,得到的主要结论如下:第一,平台制定的会员定价策略包括补贴策略和收费策略,平台实施哪种策略与佣金率、消费者时间偏好等因素有关。第二,自营商品价格折扣、两种商品的交叉弹性系数以及消费者对商品的基本需求等因素也对平台会员定价策略具有重要影响。第三,当平台难以从销售自营商品和收取佣金中的任一方面获取较高收益,或可以同时从上述两方面获取较高收益时,平台宜采取M策略;否则,平台宜采取UM策略。