Abstract: Some embodiments described herein are directed to a trunk supporting exoskeleton for reducing muscle forces in a wearer's back during forward lumbar flexion. The trunk supporting exoskeleton can include a supporting trunk frame, a first thigh link, a second thigh link, an actuator, a shaft pulley, a housing pulley, a shaft line, and a housing line. The actuator can include an actuator housing and an actuator shaft. When the wearer is bent forward relative to a vertical gravitational line in a sagittal plane, the actuator can generate an actuator resistive torque between the actuator housing and the actuator shaft. The actuator resistive torque between the actuator housing and the actuator shaft can generate tensile forces in the housing line and the shaft line, thereby generating extension torques between the respective first and second thigh links and the supporting trunk frame.

Abstract: An actuator for an exoskeleton can include a motor and a spring. The motor can include a housing and shaft. A first end of the spring can be coupled to one of the shaft or housing. A second end of the spring can be free when the shaft is in a first range of rotation of the shaft relative to the housing. The second end of the spring can be constrained by the other one of the shaft or housing when the shaft is in a second range of rotation of the shaft relative to the housing. When the shaft is in the first range of rotation, the motor can provide a motor resistive torque between the shaft and the housing, and when the shaft is in the second range of rotation, the spring can provide a spring resistive torque between the shaft and the housing.

Abstract: A pneumatic vibration device with a rotatable piston shaft comprises a piston body and a gas diverter. The piston body comprises a piston shaft, an input shaft and a piston cylinder body. The piston shaft comprises a hollow spindle with two ends connected to a first piston and a second piston through connection bearings respectively. The first piston and the second piston are connected through an inner sleeve. The spindle is connected to a rotary connection member. The input shaft stretches into the inner sleeve and is matched and connected with the rotary connection member. The gas diverter comprises a first gas diversion port and a second diversion port. The pneumatic vibration device is compact in structure and high in adaptability, and can realize rotation and vibration of drilling tools.

Abstract: An intrusion detection method includes steps of obtaining a current detection box and a historical detection box of a target in an input image; determining whether the current detection box has an intersection with a security line or a security area; determining that the target has an intrusion behavior if the current detection box has the intersection with the security line or the security area; and determining a direction of intrusion of the target according to the current detection box and the historical detection box.

Abstract: A control apparatus and a method for locking or unlocking a door include a smart key including a door locking and unlocking button provided thereon and configured for transmitting a control signal for locking or unlocking the door through a door locking and unlocking button; a smart key check module configured to determine whether the smart key is in a vehicle; and a door control module configured to determine whether the vehicle is in a started state or a turned-off state, determine whether to receive a control signal for locking or unlocking the door from the smart key according to a result of the determining whether the smart key is in the vehicle when the vehicle is in the started state, and control a corresponding door of the vehicle when receiving the control signal for locking or unlocking the door from the smart key.

Abstract: An integrated filter material, a preparation method and an application. The filter material is composed of a commercial dust removal filter material and a catalyst that is grown on the filter material and that has a function of simultaneously decomposing nitrogen oxides and dioxins. In the preparation method, a precursor solution of manganese and cerium oxides is impregnated on the filter material, and manganese and cerium oxides are grown on the filter material by means of a chemical reaction; and vanadium oxychloride is used as a precursor of vanadium oxide and is impregnated on the filter material, reacts in water, and prepared by drying, hydrothermal and other processes. The composite filter material may remove three kinds of pollutants in flue gas at the same time, and the catalyst is firmly loaded and does not easily fall off.

Abstract: The present disclosure provides a polylactic acid composition and a method of preparing the same. The polylactic acid composition comprises a polymeric material and a reaction product obtained by reacting a compound represented by formula (A) with a compound represented by formula (B), the polymeric material comprising polylactic acid, the compound represented by formula (A) being a trimeric phosphazene-based substance, and the compound represented by formula (B) being diamine. The polylactic acid composition is favorable in both flame retardancy and toughness.

Abstract: A pneumatic vibration device with a rotatable piston shaft comprises a piston body and a gas diverter. The piston body comprises a piston shaft, an input shaft and a piston cylinder body. The piston shaft comprises a hollow spindle with two ends connected to a first piston and a second piston through connection bearings respectively. The first piston and the second piston are connected through an inner sleeve. The spindle is connected to a rotary connection member. The input shaft stretches into the inner sleeve and is matched and connected with the rotary connection member. The gas diverter comprises a first gas diversion port and a second diversion port. The pneumatic vibration device is compact in structure and high in adaptability, and can realize rotation and vibration of drilling tools.

Abstract: A trunk-supporting exoskeleton for reducing muscle forces in a wearer's back during forward lumbar flexion comprises a supporting trunk, a first thigh link, a second thigh link, and an actuator, which includes an actuator first element and an actuator second element. When the wearer is in a forward-bent position, the actuator generates a first torque on the actuator first element and a second actuator torque on the actuator second element to generate extension torques between the first and second thigh links and the supporting trunk, thereby resisting bending motion of the supporting trunk in the forward-bent position. When the wearer is not in the forward-bent position, the actuator generates a substantially small first torque and second torque, resulting in small resistance to the movement of the thigh links relative to the supporting trunk during walking.

Abstract: A root canal therapy device with a mechanical vibration mode and a rotation drive mode includes a head, a handle, a first flexible drive shaft and a second flexible drive shaft. The head includes an outer main part, a mandrel part for mounting a root canal file, a first drive input shaft part and a second drive input shaft part. The mandrel part is mounted in the outer main part. A first drive motor and a second drive motor are disposed on the handle. The invention has the following beneficial effects: the root canal file can rotate and vibrate during root canal preparation, so that the wall of a root canal is efficiently cut by the file; and the file can also vibrate, so that cutting resistance and cutting temperature are effectively reduced, a smear layer is avoided, and the quality and efficiency of root canal preparation are improved.

Abstract: Provided are antibodies that specifically bind to Programmed Death-1 (PD1, Pdcd-1, or CD279) and inhibit PD1-mediated cellular signaling and activities in immune cells, antibodies binding to a set of amino acid residues required for its ligand binding, and uses of these antibodies to treat or diagnose cancer, infectious diseases or other pathological disorders modulated by PD1-mediated functions.

Abstract: A furniture accessory includes an armrest body and an insertion plate moveably coupled to the armrest body and configured for mounting to a furniture item. The furniture accessory may include a power output assembly for receiving and providing power to a detachable electrical accessory. The furniture accessory may include a power input interface and a power supply circuit for providing power from an external power source to the power output interface.

Abstract: A catalyst for inducing thermal desorption of organic matter-contaminated soil and a preparation method thereof, which uses a colloidal mixture of ferroferric oxide and ferric chloride as a catalytic active component of thermal desorption, and carbon tetrachloride as a solvent. Based on the mass of solvent, a mass percentage of catalytic active component is 0.1%-15%. Ammonia water is added dropwise to ferric chloride aqueous solution to react in oil bath to generate a ferroferric oxide colloidal solution, then ferric chloride and obtained ferroferric oxide colloidal solution are added to carbon tetrachloride, and mixed solution is continuously stirred in an oil bath to evaporate solvent water to prepare a catalyst with carbon tetrachloride as solvent. Catalyst is environmentally friendly and can induce thermal desorption of organic matters in soil. 100% desorption of chlorobenzene, o-xylene and benzo[A]anthracene can be achieved at 130° C., and energy consumption of thermal desorption is greatly reduced.