Abstract: A key-value storage system is described herein for interacting with key-value entries in a content store using a resource-efficient index. The index provides a data structure that includes a plurality of hash buckets. Each hash bucket includes a linked list of hash bucket units. The key-value storage system stores hash entries in each linked list of hash bucket units in a distributed manner between an in-memory index store and a secondary index store, based on time of their creation. The key-value storage system is further configured to store hash entries in a particular collection of linked hash bucket units in a chronological order to reflect time of their creation. The index further includes various tunable parameters that affect the performance of the key-value storage system.

Abstract: A 3D printing device including a base, a gantry, a forming platform, a tank, an adjustable platform, a driving module and a control module is provided. The gantry and the tank are respectively disposed on the base. The forming platform is movably assembled to the gantry. The adjusting platform is disposed between the gantry and the forming platform or between the tank and the base. The driving module is connected to the forming platform and the gantry. The control module is electrically connected to the driving module to drive the forming platform to reciprocate along the gantry, so that the forming platform is moved into or out of the tank. Before 3D printing is performed, the control module moves the forming platform to lean against the tank through the driving module, so as to drive the adjustable platform to deform, and confirm consistency of contact surfaces of the forming platform and the tank.

Abstract: A formation tank includes a tank body and a release film. The tank body includes a bottom plate and a tank wall. One face of the bottom plate is an inner bottom surface, and at least one engagement structure is formed on the inner bottom surface. The tank wall protrudes from the inner bottom surface and surrounds a periphery of the bottom plate. The release film is attached on the inner bottom surface and the release film is mortise-and-tenon connected to the engagement structure. An engagement structure is arranged on the bottom plate to improve an engagement force between the bottom plate and the release film. Accordingly, the release film is prevented from being detached, and therefore durability of the release film is also improved.

Abstract: A three-dimensional printing device including a body, a tank, an origin target, a sensor, and a control module is provided. The tank is rotatably assembled on the body, and the tank is filled with a liquid forming material. The origin target is disposed on the tank and rotates along with the tank. The sensor is disposed on the body and located above the liquid forming material to sense a liquid level of the liquid forming material. The control module electrically connects the tank and the sensor and drives the tank to rotate. The sensor is located above a rotation path of the origin target, and the control module senses the origin target through the sensor and positions a rotation origin of the tank.

Abstract: A 3D printing method adapted for a 3D printer is provided. The 3D printer includes a tank filled with a liquid-state forming material, a platform, a curing module and a control module. At least one of the tank and the platform as well as the curing module are electrically connected to the control module to be controlled by the same, and a 3D object is formed on the platform. The 3D printing method includes analyzing a model of the 3D object to obtain a layered information; the control module correspondingly distributes the layered information at a plurality of forming positions at the bottom of the tank. A forming layer is cured by the curing module and located at a forming position, and then the platform and the tank rotate relatively to move the forming layer to another forming position, and another forming layer is formed at the another forming position.

Abstract: A 3D printer including a machine platform, a container, at least one stirring element and a driving module is provided. The container is assembled to the machine platform and is adapted to contain a liquid forming material. The stirring element has a rotating shaft and is adapted to rotate along the rotating shaft. The driving module is connected to at least one of the container and the at least one stirring element, so as to drive the container and the at least one stirring element to produce relative movement when 3D printing is not performed, and the liquid forming material in the container is stirred by the at least one stirring element.

Abstract: A head-mounted display device includes a wearable assembly, an adjusting module and a control module. The wearable assembly is suitable for wearing to a user's head. The adjusting module is movably coupled to the wearable assembly, and includes a transmission mechanism and a driving element. The transmission mechanism is movably coupled to the wearable assembly, and the driving element is coupled to the transmission mechanism. The control module is electrically connected to the driving element. When the control module outputs a control signal to the driving element, the driving element drives the transmission mechanism to actuate, such that the transmission mechanism drives the wearable assembly along with driving of the driving element to change a girth of the wearable assembly to fit heads of different users.

Abstract: A three-dimensional printing apparatus including a body, a rotation module, a tank, an elevating module, a forming platform, a curing module, and a control module is provided. The rotation module and the elevating module are disposed on the body. The tank is disposed on the rotation module. The forming platform is disposed on the elevating module. The curing module disposed in the body and under the tank. The control module is electrically connected to the rotation module, the elevating module, and the curing module. The forming platform dips into the forming material in liquid in the tank and the curing module cures the forming material between the forming platform and an inner bottom of the tank to form a solidification layer. Then the elevating module and the rotation module respectively drive the forming platform to rise and rotate relatively to the tank simultaneously.

Abstract: A semiconductor device package includes: (1) a carrier; (2) an electronic component disposed over a top surface of the carrier; (3) a package body disposed over the top surface of the carrier and covering the electronic component; and (4) a shield layer, including a first magnetically permeable layer disposed over the package body, a first electrically conductive layer disposed over the first magnetically permeable layer, and a second magnetically permeable layer disposed over the first electrically conductive layer. The first electrically conductive layer is interposed between the first magnetically permeable layer and the second magnetically permeable layer. A permeability of the first electrically conductive layer is different from a permeability of the first magnetically permeable layer and a permeability of the second magnetically permeable layer.

Abstract: A 3D printer including a machine platform, a container, at least one stirring element and a driving element is provided. The container contains a liquid forming material, and is movably assembled to the machine platform. The stirring element is disposed in the container to move along with the container, and has a motion mode of moving away from or moving close to a bottom of the container. The driving element is fixed on the machine platform and extends into the container. The driving element and the stirring element are mutually located on moving paths of each other. During a moving process of the container, the driving element and the stirring element lean against each other to trigger the motion mode of the stirring element to move away from or move close to the bottom of the container, so as to stir the liquid forming material in the container.

Abstract: A method includes a mobile device traveling in a vehicle scanning for Bluetooth devices. When the mobile device detects a Bluetooth device, it then determines that the Bluetooth device is a work zone tag. The mobile device then issues a warning that indicates that the vehicle is near a work zone based on the work zone tag.

Abstract: A 3D printer including a machine platform, a container and an injection module is provided. The container and the injection module are disposed on the machine platform, and the injection module injects a liquid forming material into the container. The injection module includes a bottle body, a deformable opening member, a driving assembly and a flow guide member. The bottle body contains the liquid forming material. The driving assembly is adapted to deform the deformable opening member. The driving assembly drives the deformable opening member to an open state, and the liquid forming material in the bottle body flows to the flow guide member through the deformable opening member, and flows to the container through the flow guide member. The driving assembly drives the deformable opening member to a close state, and the liquid forming material stops flowing to the flow guide member from the deformable opening member.

Abstract: A water spray gun with flow control comprises a gun body having a water inlet, a water outlet and an accommodating chamber connected therebetween; a water control valve, being pivotably installed in the accommodating chamber and having a receiving recess being received in the accommodating chamber, wherein the receiving recess has its outside formed with an opening and has its bottom provided with a water-filling port; and a sealing block slidably installed in the receiving recess, so that when a pressure of water coming from the water-filling port acts on the sealing block from bottom, the sealing block slides toward the opening. Thereby, water pressure ensures close fit of the sealing block. Even if the sealing block is worn, the water pressure coming from the water-filling port can still push the sealing block outside to keep the water outlet sealed.

Abstract: A polarizer includes a first polarizing layer. The polarizing layer is configured for polarizing light. The first polarizing layer has a first absorption axis. The first absorption axis is a curved line.

Abstract: An optimization method and system of matching a product experiencing activity with participants are disclosed. The method comprises the following steps: storing, in a memory, personal information of the applicants collected by conducting an investigation with questionnaires; clustering the personal information of the applicants to form a plurality of characteristic sample groups; evaluating a weight value of each of the applicants in each of the plurality of characteristic sample groups to produce a representative for each of the plurality of characteristic sample groups in accordance with the weight values; selecting a plurality of candidates to participate the experiencing activity in coordination with the characteristic sample groups and the representative according to an activity restriction of the experiencing activity; and notifying the candidates to participate the experiencing activity.

Abstract: A three-dimensional printing method for a three-dimensional printing system including a tank, a platform, an injection module, a warning module, a curing module, and a control module is provided. The control module is electrically connected to the curing module, the injection module, and the warning module. The method includes: analyzing a required amount of the liquid forming material corresponding to a three-dimensional object; obtaining a safe amount of the liquid forming material in the tank; and comparing the required amount and the safe amount, wherein the control module provides a response signal to the injection or warning module when the safe amount is less than the required amount. The injection module receives the response signal to inject the liquid forming material to the tank. The warning module receives the response signal to remind a user to provide the liquid forming material to the tank.

Abstract: The disclosure provides a three-dimensional printing device and a three-dimensional printing method. The device includes a controller, a tank and a printing platform. The controller performs a three-dimensional printing operation according to a slice file, and judges the magnitude of shear force corresponding to a slice object in the slice file to determine a specific rotating angle. A carrying surface of the printing platform faces a bottom surface of the tank. When the controller performs the three-dimensional printing operation, the printed object corresponding to the slice object is formed between the carrying surface of the printing platform and the bottom surface of the tank. The controller controls the printing platform to move away the tank by a default vertical distance, and controls the tank to rotate by a specific rotating angle, such that the printed object is removed from the bottom surface of the tank.

Abstract: A 3D printing method adapted for a 3D printer is provided. The 3D printer includes a tank filled with a liquid-state forming material, a platform, a curing module and a control module. At least one of the tank and the platform as well as the curing module are electrically connected to the control module to be controlled by the same, and a 3D object is formed on the platform. The 3D printing method includes analyzing a model of the 3D object to obtain a layered information; the control module correspondingly distributes the layered information at a plurality of forming positions at the bottom of the tank. A forming layer is cured by the curing module and located at a forming position, and then the platform and the tank rotate relatively to move the forming layer to another forming position, and another forming layer is formed at the another forming position.

Abstract: A rotating device includes a rotating shaft, a rotating disc, a left clamping disc, a right clamping disc, an upper clamping disc, and a recovering component. The upper clamping disc, the left clamping disc, and the right clamping disc are sleeved on the rotating shaft. The upper clamping disc fixes the rotating disc, the left clamping disc, and the right clamping disc on the rotating shaft. The recovering component abuts between a side of the left clamping disc and a side of the right clamping disc. A clamping zone is formed between the other side of the left clamping disc and the other side of the right clamping disc for clamping the detecting disc, and an overlapping zone is formed between the side of the left clamping disc and the side of the right clamping disc and opposite to the clamping zone.