Device

摘要： This article examines the technological parameters of the device for the separation of fibers suitable for spinning by processing fibrous waste from the technological processes of ginneries. Technological processes in the cotton ginning industry include a complex of physical and mechanical advantages, the successful study of which is possible only with the use of modern achievements in science and technology. Therefore, it is advisable to conduct scientific research based on mathematical modeling. To justify the effective operation of the selected design of the cotton fiber separation device, it is necessary to select its optimal technological parameters. Improving the efficiency of the process of separation of spinning fibers from the composition of fibrous waste depends directly on technological parameters. The application of mathematical methods in the planning and conduct of research allows for determining the individual effects of the interaction of several factors that characterize the combined parameters of the optimization parameters, in contrast to traditional computational methods of research. As a result, it will be possible to obtain a mathematical model of the object understudy in a relatively small number of tests, which will simultaneously serve to obtain optimal solutions.

摘要： The security issues of industrial control systems(ICSs)have become increasingly prevalent.As an important part of ICS security,honeypots and anti-honeypots have become the focus of offensive and defensive confrontation.However,research on ICS honeypots still lacks breakthroughs,and it is difficult to simulate real ICS devices perfectly.In this paper,we studied ICS honeypots to identify and address their weaknesses.First,an intelligent honeypot identification framework is proposed,based on which feature data type requirements and feature data acquisition for honeypot identification is studied.Inspired by vulnerability mining,we propose a feature acquisition approach based on lightweight fuzz testing,which utilizes the differences in error handling between the ICS device and the ICS honeypot.By combining the proposed method with common feature acquisition approaches,the integrated feature data can be obtained.The experimental results show that the feature data acquired is effective for honeypot identification.

摘要： Large light absorption coefficients,tunable bandgaps,high tolerance to defects,long carrier lifetimes as well as diffusion lengths render lead halide perovskite materials ideal candidates for optoelectronic devices.Except application in solar cell,photodetectors based on perovskite materials have been recognized as another game changer due to the achievements such as high responsivity of 1.9×104 A/W[1],gain factor larger than 5.0×104[1],large detectivity of 1014 J[2],high on/off ratio of 105[3],fastest response time down to 1 ns[4],large linear dynamic range exceeding 170[5]and low detachable light intensity as small as 1 pW/cm2[6],which demonstrate the potential applications of perovskite based photodetector in the areas of weak light detection.

摘要： Introduction: The incidence of lesions of sensory and motor nerves associated with oral and maxillofacial surgery is often underestimated, representing around 32.0% of all lesions, and orthognathic surgery contributes 12.3% to these lesions. Thus, the use of piezosurgery (PiZCi) has been indicated in several procedures within oral and maxillofacial surgery due to a number of advantages over conventional drill and saw techniques. Objective: to analyze the main literature on the use of the piezoelectric device in relation to the use of drills and to orthognathic surgery in dentistry. Methods: A total of 41 articles were found involving Orthognathic Surgery, Piezoelectric Device, Drills Device, Saws Device, and Efficiency. Initially, it was held the exclusion existing title and duplications following the interest described this work. After this process, the summaries were evaluated, and a new exclusion was held. 29 articles were included and discussed in this study. Initially, the keywords were determined by searching the DeCS tool (Descriptors in Health Sciences, BIREME base) and later verified and validated by MeSh system (Medical Subject Headings, the US National Library of Medicine). Results and conclusion: It was concluded that the piezoelectric device has excelled with an effective surgical technique, being able to be indicated in the most diverse areas of the oral surgery, providing accurate, clean and minimally traumatic osteotomies for the soft tissues, intraoperative bleeding, when compared to conventional surgery using drills and/or saws.

摘要： As a promising ultra-wide bandgap semiconductor, gallium oxide(Ga_2O_3) has attracted increasing attention in recent years. The high theoretical breakdown electrical field(8 MV/cm), ultra-wide bandgap(～ 4.8 eV) and large Baliga's figure of merit(BFOM) of Ga_2O_3 make it a potential candidate material for next generation high-power electronics, including diode and field effect transistor(FET). In this paper, we introduce the basic physical properties of Ga_2O_3 single crystal, and review the recent research process of Ga_2O_3 based field effect transistors. Furthermore, various structures of FETs have been summarized and compared, and the potential of Ga_2O_3 is preliminary revealed. Finally, the prospect of the Ga_2O_3 based FET for power electronics application is analyzed.

摘要： As a wide-bandgap semiconductor(WBG), β-Ga_2O_3 is expected to be applied to power electronics and solar blind UV photodetectors. In this review, defects in β-Ga_2O_3 single crystals were summarized, including dislocations, voids, twin, and small defects. Their effects on device performance were discussed. Dislocations and their surrounding regions can act as paths for the leakage current of SBD in single crystals. However, not all voids lead to leakage current. There's no strong evidence yet to show small defects affect the electrical properties. Doping impurity was definitely irrelated to the leakage current. Finally, the formation mechanism of the defects was analyzed. Most small defects were induced by mechanical damages. The screw dislocation originated from a subgrain boundary. The edge dislocation lying on a plane slightly tilted towards the(102) plane, the(101) being the possible slip plane. The voids defects like hollow nanopipes, PNPs, NSGs and line-shaped grooves may be caused by the condensation of excess oxygen vacancies, penetration of tiny bubbles or local meltback. The nucleation of twin lamellae occurred at the initial stage of "shoulder part" during the crystal growth. These results are helpful in controlling the occurrence of crystal defects and improving the device performance.

摘要： Uniaxial stress is a powerful tool for tuning exciton emitting wavelength, polarization, fine-structure splitting (FSS), and the symmetry of quantum dots (QDs). Here, we present a technique for applying uniaxial stress, which enables us in situ to tune exciton optical properties at low temperature down to 15 K with high tuning precision. The design and operation of the device are described in detail. This technique provides a simple and convenient approach to tune QD structural symmetry, exciton energy and biexciton binding energy. It can be utilized for generating entangled and indistinguishable photons. Moreover, this device can be employed for tuning optical properties of thin film materials at low temperature.

摘要： In order to provide a novel and more effective alternative to the commonly used relay protection testing device that outputs only the sinusoidal testing signals, the concept of fault waveform regenerator is proposed in this paper, together with its hardware structure and software flow chart. Fault waveform regenerator mainly depends on its power amplifiers (PAs) to regenerate the fault waveforms recorded by digital fault recorder (DFR). To counteract the PA’s inherent nonlinear distortions, a digital closed-loop modification technique that is different from the predistortion technique is conceived. And the experimental results verify the effectiveness of the fault waveform regenerator based on the digital closed-loop modification technique.

摘要： BACKGROUND The retrospective review of I-ring pupil expansion ring use is designed to examine the patient characteristics and associated surgical challenges in a clinical practice.The hypothesis is that I-ring provides a necessary additive tool in dealing with challenging cataract surgeries with small pupils.AIM To document the safety profile and use of I-ring pupil expansion ring in a clinical practice.METHODS A retrospective chart review of 12 consecutive cases within the same year(2016)of cataract surgeries employing I-ring pupil expansion ring(Beaver-Visitec,International)by a single surgeon at the same ambulatory surgical center was conducted.Demographic,pre-op,intra-op,and post-op data were recorded.Total number of cataract cases performed was also recorded.RESULTS 8 of 12 cases were planned I-ring cases.1 case was decided intraoperatively when femtosecond laser caused the pupil to shrink.The other 3 cases were also decided upon intraoperatively when pupil was deemed to be small.7 patients had IFIS from Flomax use.2 patients had pseudoexfoliation syndrome as the cause of small pupil.2 patients had narrow angles with brunescent cataracts.2 patients had pre-op partial zonular dehiscence.1 patient had 360o of posterior synechiae.2 cases had ruptured posterior capsule that required anterior vitrectomy.No complications were attributed to the pupil expansion ring.A total of 296 cataract surgeries were performed that year by the surgeon,making the rate of pupil ring use 4.1%.CONCLUSION Small pupil requiring pupil expansion ring during cataract surgery is often associated with other challenges,such as brunescent cataract,zonular weakness,and posterior synechiae in this series.I-ring helped to reduce at least one challenge in these difficult cases.

摘要： 本发明的基于Device Mapper的容器镜像分层加密存储方法，主要采用dm‑crypt对具体的快照设备进行加密。一个镜像层对应Device Mapper下的一个逻辑设备，使用当前镜像层的密钥通过dm‑crypt模块对该逻辑设备加密。需要使用镜像层时，使用镜像层密钥通过dm‑crypt模块解密打开之前加密过的设备，解密打开的设备就是一个可访问的设备，通过绑定到文件系统后提供给用户使用。本发明改进了现有的容器镜像存储机制，提出了镜像分层加密存储的安全机制，实现了容器镜像层数据安全隔离，既实现了容器的存储安全，也可以通过分层加密实现对容器的访问控制。方便安全管理人员根据不同的需要向不同权限的用户提供应用服务，使得容器的应用安全得到显著提升。

摘要： 本发明实施例公开了一种MTC Device触发消息的投递确认方法和设备，通过应用本发明实施例的技术方案，以管理服务器(例如MME或SGSN)为判断主体，在向终端设备发送MTC Device触发消息时，携带相应的标识信息，并根据是否接收到终端设备所返回的携带同样标识信息的确认消息，来确定相应的MTC Device触发消息是否投递成功，从而，解决现有技术中不能确定MTC Device触发消息是否投递成功的问题，能够准确的确定MTC Device触发消息是否被终端设备成功接收，提高了MTC Device触发消息投递过程的可靠性。

摘要： 本发明提供一种Device to Device通信中的无目标用户检测方法，包括：由源用户广播包括自身ID的设备发现发起消息；以及根据接收该设备发现发起消息的目标用户的模式，确定是否从目标用户向源用户发送设备发现确认消息。采用本发明提供的方法，用户可以根据其意愿在受限模式和开放模式之间进行转换。此外，本发明还增大了D2D通信可以检测到的用户集，提高了D2D通信体验效果。

摘要： 本发明提供一种在安卓上运行OpenHarmony Device Connector的方法，包括以下步骤：步骤(1).确认sys.usb.configfs的状态；步骤(2).sys.usb.configfs为true的情况下：当sys.usb.config为hdc的时候，当sys.usb.ffs.ready为1的时候，停止adb服务，等待安卓将sys.usb.ffs.ready改成0；步骤(3).当sys.usb.ffs.ready为0的时候，将USB的UDC设为none，启动hdc服务，配置WINUSB描述和PID，启动HDC的ffs，重新配置UDC。本发明将hdc和adb同时放置在操作系统中运行，从而让开发者可以自行切换，选用不同的调试方式。方便开发者选择自己喜好的开发工具来工作。

摘要： 本发明实施例公开了一种使用BMC Flash备份Controller Device韧体的装置和方法，装置包括启动模块、控制模块和升级模块，所述启动模块连接控制模块和升级模块，所述升级模块连接控制模块；所述启动模块用于伺服器启动，所述升级模块用于韧体升级，所述控制模块用于韧体启动和韧体升级的切换；方法包括：将待升级韧体暂存至BMC RAM中；所述BMC检查RAM中待升级韧体的签名和内容是否正确；如升级后的韧体通过检查，则输出升级前后的韧体差异档；所述BMC将韧体差异档写入Backup flash；所述BMC将暂存至RAM中的待升级韧体写入Device flash；Controller Device使用升级后的韧体启动伺服器。本发明实施例解决现有Controller Device韧体备份电路中Device flash的功能和容量受限、电路复杂和占用板卡空间较多的问题。

摘要： 本发明公开了一种Modbus与Device Net协议识别兼容的设计方法，属于计算机通信领域，包括步骤：(1)设计FPGA控制器模块，实现协议传输、识别和分类；(2)设计以CPU为核心的处理器模块，实现Device Net或Modbus协议与上位机的主、从站通信；(3)设计可兼容的外部接口管脚定义和尺寸封装，实现Modbus协议与Device Net协议接口兼容要求；(4)设计CAN控制器模块，实现对UART总线的通信速率、流控方式、数据位、停止位及校验位的配置；(5)搭建协议识别兼容设计的系统硬件电路和软件架构。该方法可通过电路的一次开发，实现Modbus与Device Net协议的传输、识别和分类，与上位机的主、从站通信控制。本发明具有范围广、灵活性强等特点，可广泛在智能制造领域应用。

摘要： 本发明涉及一种基于Device Mapper的系统存储优化方法，在客户端发起数据请求时，使用Device Mapper技术将固态存储作为机械硬盘的缓存，当用户空间发起读操作的时候，先去缓存中查找是否有数据，如果有则返回给用户空间，如果没有则再去机械硬盘读取。当用户空间发起写操作的时候，先写到缓存，当系统空闲时再写入到机械硬盘中。本发明充分利用固态硬盘低功耗的特点，一方面能够通过减少机械硬盘的使用频率而降低其功耗，另一方面通过提升工作效率而降低完成相同工作量所需要消耗的能量，优化了数据存储效率，节约了数据存储设备的硬件成本。

摘要： 本发明的基于Device Mapper的容器镜像分层加密存储方法，主要采用dm‑crypt对具体的快照设备进行加密。一个镜像层对应Device Mapper下的一个逻辑设备，使用当前镜像层的密钥通过dm‑crypt模块对该逻辑设备加密。需要使用镜像层时，使用镜像层密钥通过dm‑crypt模块解密打开之前加密过的设备，解密打开的设备就是一个可访问的设备，通过绑定到文件系统后提供给用户使用。本发明改进了现有的容器镜像存储机制，提出了镜像分层加密存储的安全机制，实现了容器镜像层数据安全隔离，既实现了容器的存储安全，也可以通过分层加密实现对容器的访问控制。方便安全管理人员根据不同的需要向不同权限的用户提供应用服务，使得容器的应用安全得到显著提升。

摘要： 本发明提供一种type C切换host和device模式的切换电路，属于USB技术领域。本发明包括type C接口、USB模式切换模块、DSP、电源管理模块、与电源管理模块相连的充电模块和与所述充电模块相连的电池，其中，所述DSP分别与USB模式切换模块、电源管理模块相连，所述电源管理模块为整个电路供电，所述USB模式切换模块分别与所述充电模块和type C接口相连。本发明的有益效果为：具有设计简单，成本低廉，软件修改及维护简单的优点。

摘要： 本实用新型提供一种type C切换host和device模式的切换电路，属于USB技术领域。本实用新型包括type C接口、USB模式切换模块、DSP、电源管理模块、与电源管理模块相连的充电模块和与所述充电模块相连的电池，其中，所述DSP分别与USB模式切换模块、电源管理模块相连，所述电源管理模块为整个电路供电，所述USB模式切换模块分别与所述充电模块和type C接口相连。本实用新型的有益效果为：具有设计简单，成本低廉，软件修改及维护简单的优点。