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Increasing demand for DRAM scaling and high-bandwidth has driven DRAM technology to 3D/2.5D integration. With the innovative Hybrid Bonding technology, a new Stacked Embedded DRAM (SEDRAM) architecture was developed on LPDDR4/4X product. In this SEDRAM, a DRAM array wafer and logic wafer were fabricated separately and then face-to-face fusion connected through ultra-high-density, low-resistance Hybrid Bonding. By separating the control, I/O, DFT and periphery circuits to a logic die, SEDRAM offers a novel approach to DRAM product development and accomplishes an extremely high-bandwidth logic-to-memory interface speed of 34GBps per 1Gb with low power consumption as low as 0.88pJ/bit.

In order to study the effect of flexural stiffness on the mechanical properties of single conductor under wind load, a configuration function of the conductor considering stiffness is established in this paper. Based on the configuration function, the finite element model is established, and the effects of suspension point angle, span on the mechanical properties of down lead conductor under wind load are studied. The results show that, compared with the catenary model, the model in this paper is more consistent with the experimental fitting formula. The angle of the suspension point has obvious influence on the tension of down lead conductor. With the increase of the angle of the suspension point from 0°to 80°, the tension decreases by nearly one third. The bending moment is affected by the alignment, and the reverse sign appears with the increase of suspension point angle. When the redundancy rate is the same, the span increases from 2 m to 4 m, and the tension of the conductor decreases by 18%.

Using RS (Remote Sensing) and GIS (Geographic Information System) technology, the upper part of the Miyun reservoir area was studied to evaluate landslide risk. Adopting the AHP(Analytic Hierarchy Process), six evaluation element including slope, elevation, land use, vegetation cover, soil type, rainfall were selected as the evaluation factors. The research area was divided into five regions as follows, landslide hardly ever happening, landslide difficultly happening, landslide possibly happening, landslide easily happening and landslide extremely easily happening by researching the weighted superposition by spatial analysis in the ArcGIS environment.

This paper describes the wireless communication module NRF905 in the bank application of queuing systems. Describes the system's overall design, a brief introduction NRF905 module hardware features and software programming. Focuses on the realization of wireless communication methods and the development of communication protocols. Also introduced the system hardware design and workflow of each module. The system performed well in actuall use.

Sensor or transducers is a kind of important tool for completion of signal collection, and is a device which can feel the physical world of light, pressure, temperature, flow, level, acceleration, force, etc. Then convert this signal into usefulness output signal according to a certain law. The output of some sensors, such as piezoresistive sensor, strain sensor bridge sensor, thermocouple sensor, thermal resistance sensor, angle sensor, accelerometer sensor, humidity sensor, capacitive sensor, piezoelectric sensor etc., is very weak. Its temperature dependence and linearity are worse, and the SNR in the process of transference decrease significantly. For this disadvantage, the signals must be processed before post-processing. It can be realized by the digitally controlled potentiometers. In the fiber receiver, photodiode programmable transimpedance amplifier with digitally controlled potentiometers converts the current into voltage. Using the digitally controlled potentiometers, it can be linear that the characteristic of the platinum thermal resistance temperature sensor (including zero adjustment and full-range adjustment) and fault detect, and it can meet the request of accurate temperature measurement. The digitally controlled potentiometers also can be used in pressure measurement system to calibrate the offset voltage and full-range of the pressure sensor. Finally, the topology with feedback system constituted by digitally controlled potentiometers was provided.

The digitally controlled potentiometer is a kind of new style electronic device, which have good development foreground. It can replace the mechanical potentiometer in many fields. The MCU can program the digitally controlled potentiometer through interface circuit to compose programmable analogy device. The paper provides the principle of the test circuit of the digitally controlled potentiometer, and expatiates the test methods and test data and note items of the test technology. The test parameters include integral nonlinearity error, differential nonlinearity error, the wiper resistance and wiper capacitance. When using the key stroking digitally controlled potentiometer, the debouncing circuit has to be used to avoid the misoperation caused by the bounce. The misoperation will cause that the setup value of the potentiometer is not accordant with the times of key pressing. Analyzing the waveform of the bounce, we find out that the character of the waveform is a kind of high frequency noise. They are sharp pulse or wider pulse, and have some randomness. In the close process, the amplitude of the voltage of the pulses lower and lower, in the end the amplitude reached low level. In the open process the amplitude of the voltage of the pulses higher and higher, in the end the amplitude reached high level. The paper expatiates the debouncing circuit design of the key press digitally controlled potentiometer. The first project is using filter and time delay to avoid the bouncing time. The second project is using software and bouncing judge methods the two projects can be selected in need. The theory and the test methods are all verified and of practical value.

The structure and basic theory of automatic inclinometer system was presented, which take advanced quartz servo-accelerometer as sense organ. Quartz inclinometer can be used to measure the vertical vector of gravitation g in axes using probe sensor in order to confirm the incline angle of probe axes relatively horizontal. Therefore uprightness displacement of probe axes relatively horizontal can be calculated based on this measure principle .The paper presents the real-time measuring curve of quartz inclinometer. The result indicates that the system has many merits, such as high measure precision, better anti-jamming character, light mass, low power cost and it fits fieldwork for power supply by battery.