Abstract: A gyro measurement while drilling system, which includes a strapdown inertial unit, a filtering and level conversion module, a data acquisition and data communication module, a driving mechanism, a driving control module and a navigation computer. A gyro measurement while drilling method, which is used in the measurement while drilling system and includes one or a combination of the following methods: a full parameter variable compensation method, an initial alignment algorithm and a continuous measurement while drilling method. The system and method of the present disclosure can meet the most demanding application scenarios in the field of petroleum drilling measurement, i.e.

Abstract: A high-temperature miniaturized resonant gyroscope, which comprises a resonator, a circuit board, a piezoelectric element, a supporting base, a shell and a binding post, wherein the resonator is arranged in the shell and connected with the supporting base, the piezoelectric element is connected with the binding post through a metal conductor, and key process points of internal elements of the gyroscope are fixedly connected by high-temperature materials and high-temperature processes. The gyroscope is a small-sized gyroscope capable of working at a high temperature; the present disclosure also provides an inertial navigation system, which comprises a triaxial gyroscope, a triaxial accelerometer and a damper, wherein the gyroscope is fixedly connected with the damper, and the gyroscope adopts the high-temperature resonant gyroscope. A drilling measurement system and a measurement method.

Abstract: An attitude measurement method, which relates to the technical field of measurement while drilling in directional drilling, which can improve the observability of inertial instrument errors, suppress the repeatability errors of gyroscopes and improve the attitude measurement accuracy.

Abstract: A self-calibration method and system of a solid-state resonator gyroscope, which can realize the separation of the bias error from the angular rate, and fundamentally solve the problem of repeatability errors; this calibration method acquires steady-state signals of key monitoring points in a gyroscope in different working modes in real time by externally feeding excitation signals, and realizes the separation of the bias error from the input angular rate by an algorithm, thus calibrating the repeatability error of the gyroscope.

Abstract: An attitude measurement method, which relates to the technical field of measurement while drilling in directional drilling, which can improve the observability of inertial instrument errors, suppress the repeatability errors of gyroscopes and improve the attitude measurement accuracy.

Abstract: A gyro measurement while drilling system, which includes a strapdown inertial unit, a filtering and level conversion module, a data acquisition and data communication module, a driving mechanism, a driving control module and a navigation computer. A gyro measurement while drilling method, which is used in the measurement while drilling system and includes one or a combination of the following methods: a full parameter variable compensation method, an initial alignment algorithm and a continuous measurement while drilling method. The system and method of the present disclosure can meet the most demanding application scenarios in the field of petroleum drilling measurement, i.e.

Abstract: A high-temperature miniaturized resonant gyroscope, which comprises a resonator, a circuit board, a piezoelectric element, a supporting base, a shell and a binding post, wherein the resonator is arranged in the shell and connected with the supporting base, the piezoelectric element is connected with the binding post through a metal conductor, and key process points of internal elements of the gyroscope are fixedly connected by high-temperature materials and high-temperature processes. The gyroscope is a small-sized gyroscope capable of working at a high temperature; the present disclosure also provides an inertial navigation system, which comprises a triaxial gyroscope, a triaxial accelerometer and a damper, wherein the gyroscope is fixedly connected with the damper, and the gyroscope adopts the high-temperature resonant gyroscope. A drilling measurement system and a measurement method.

Abstract: Embodiments of the present disclosure describe compositions comprising a molecular building block (MBB) having the formula [RE6(?3-OH)8(O2C—)6N4C—)6] or [RE6(?3-OH)8(O2C—)12], wherein RE is a rare earth metal ion. Embodiments of the present disclosure further describe methods of making a metal-organic framework (MOF) composition comprising contacting one or more molecular building blocks (MBBs) with one or more bidentate ligands, wherein the MBBs have the formula [RE6(?3-OH)8(O2C—)6N4C—)6] or [RE6(?3-OH)8(O2C—)12], wherein RE is a rare earth metal ion.

Abstract: Embodiments of the present disclosure describe compositions comprising a molecular building block (MBB) having the formula [RE6(?3-OH)8(O2C—)6N4C—)6] or [RE6(?3-OH)8(O2C—)12], wherein RE is a rare earth metal ion. Embodiments of the present disclosure further describe methods of making a metal-organic framework (MOF) composition comprising contacting one or more molecular building blocks (MBBs) with one or more bidentate ligands, wherein the MBBs have the formula [RE6(?3-OH)8(O2C—)6N4C—)6] or [RE6(?3-OH)8(O2C—)12], wherein RE is a rare earth metal ion.

Abstract: Provided is a quartz pendulous accelerometer including a quartz meter configured to sense an acceleration signal, convert the acceleration signal into an inertia torque, and convert the inertia torque into a quartz meter output signal; a readout apparatus configured to convert the meter output signal into an input signal recognizable by a pulse generating apparatus; and a pulse generating apparatus configured to perform control algorithm conversion, oversampling and digital quantization on the input signal to obtain a quantized current pulse, which is converted into an electromagnetic pulse torque for balancing the inertia torque.

Abstract: Metal organic framework compositions can have a face centered cubic structure.

Abstract: The invention relates to the technical field of oilfield exploration and development, and particularly relates to a method for characterizing the rock physical characteristics of deeply buried carbonate rocks, comprising the following steps: determining a rock type of a rock thin section by identifying the surface structure characteristics of the rock thin section corresponding to a core plunger sample; performing a normal pressure nuclear magnetic resonance test and rock physical characteristic tests on the core plunger sample; establishing an identification plate, a first relation, a second relation and a third relation; characterizing the rock physical characteristics of a target rock sample under normal pressure and its buried depth according to the normal pressure nuclear magnetic resonance test result and the overburden pressure nuclear magnetic resonance test result of the target rock sample respectively.

Abstract: Provided is an accelerometer, and particularly to a quartz pendulous accelerometer, including a quartz meter, which is configured to sense an acceleration signal, convert the acceleration signal into an inertia torque and convert the inertia torque into a quartz meter output signal; a readout apparatus, which is configured to convert the meter output signal into an input signal recognizable by a pulse generating apparatus; a pulse generating apparatus, which is configured to perform control algorithm conversion, oversampling and digital quantization on the input signal to obtain a quantized current pulse, where the quantized current pulse is converted into an electromagnetic pulse torque for balancing the inertia torque. By means of a circuit design and a system stability design of the present disclosure, digital feedback is realized while quantizing a feedback current is implemented. Negative feedback is realized by adopting an oversampling technique, so that the linearity, the dynamic precision etc.

Abstract: Metal organic framework compositions can have a face centered cubic structure.

Abstract: Metal organic framework compositions can have a face centered cubic structure.

Abstract: Metal organic framework compositions can have a face centered cubic structure.

Abstract: Metal organic framework compostions can have a face centered cubic structure.

Abstract: Metal organic framework compostions can have a face centered cubic structure.