bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of marine oil spill model based on Monte Carlo method in Laoshan Bay
Authors: Gong Jianbo , Pang Liang
Published: December 2019

The Monte Carlo method is used to simulate the random motion of oil particles, and it is more and more widely used in the oil spill model. The marine oil spill model established in this paper focuses on the two most important processes in the oil spill process: one process is to simulate the diffusion process of oil spill, whose main method is the Monte Carlo method; the other is to simulate the oil film drifting on the sea, which mainly considers the marine hydrological conditions during the oil spill, especially the transport of the wind field and the surface flow field to the oil film. After using this model to simulate an oil spill accident, in order to verify the accuracy, the mature simulation software Mike21 OS module is used to simulate the oil spill under the same conditions, and finally the two results will be compared and analyzed. In this paper, the improvement and innovation of the model design and calculation method are made. When considering the influence of the flow field on the oil film motion, the flow field at the corresponding moment of the oil particle is accurately calculated by the differential method, and the accuracy of the simulation is improved. The Euler-Lagrangian particle tracking method is used to determine the drift process of the oil film. The Monte Carlo method is used to simulate the diffusion process of the oil film and to establish the marine oil spill model. In the calculation, mainly by dividing the simulation process into a certain number of time periods, the motion of the oil particles under the influence of wind speed and flow velocity and the free diffusion motion are superimposed in each time period to obtain the motion distance of this time period.
Effect of Nano-CaCO3 on Concrete Compressive Strength
Authors: Yang Jiangong
Published: December 2019

By comparing and analyzing the compressive test data of different content of nano-CaCO3 concrete, the method of optimizing the compressive performance of nano-CaCO3 concrete is proposed. Based on this, the influence of fly ash content on the compressive strength of nano-CaCO3 concrete is studied, which provides a reference for improving the durability of concrete. Improve the recycling efficiency of building materials and accelerate the practical application of nano-CaCO3 material concrete in engineering industry.
Effect of Magnetic Pulsing and Low-Temperature Vacuum Annealing on the Soft Magnetic Properties of Hitperm Amorphous/Nanocrystalline Alloy
Authors: Gu Yue , Xiao Zhiwei , Zhang Yanhui , Chao Yuesheng , Wang Jian , Wang Biao
Published: December 2019

We studied soft magnetic properties of FeCoHfBCu amorphous/nanocrystalline alloy treated by medium-frequency magnetic pulsing (frequency 1500-2000Hz, field intensity 200-250Oe) and vacuum annealing at low temperature. The results of Mössbauer spectroscopy and transmission electron microscope show that the treating of magnetic pulsing with a medium frequency can introduce the nanocrystallization of amorphous FeCoHfBCu, precipitation of nm phase α-Fe(Co). And, with the increasing of pulsed frequency and field itensity, the crystalized volume friction increases from 24.71% to 35.2%. The low-temperature vacuum annealing for 100°C/30min of magnetic pulsed samples further improved the soft magnetic properties of nanocrystalline alloy. As compared with the amorphous state, the magnetic coerelvity decreaced from 103.4A/m to 34.0A/m, the saturated magnetization decreased from 160.47emu/g to 149.32emu/g.
Detection Technology and Application of Three-Dimensional Ultrasonic Imaging of Concrete
Authors: Lou Miao , Liao Xudong , Lv Xianghui , Li Bo , Deng Jinqiu
Published: December 2019

Concrete is a very important structural material in engineering buildings and it is of great significance and practical value to visually describe the internal components and defects of concrete structures by means of imaging. In this paper, a three dimensional imaging detection technology for concrete has been introduced, which employs special techniques such as point contact, dry coupling, array and shear wave observation, and the result of the test block experiment and engineering practice shows that this method can accurately detect abnormal parts of steel bar and void in steel fiber reinforced concrete.
Effectiveness of air entraining agent and defoamer on the bubble distribution of fresh mortar under different mixing methods
Authors: Hu Jianwei , Xie Yongjiang , Liu Zike , Weng Zhicai , Wang Yuehua , Li Kang
Published: December 2019

The purpose of this study was to elucidate the distribution of fine bubbles and coarse bubbles in the mortar system of cement-superfine slag powder mortar after multiple mixing of air-entraining agent and defoaming agent. The experimental study used a fresh concrete pore structure analyzer (AVA instrument) to measure the bubble size distribution and related bubble parameters of fresh mortar. The critical size of the bubbles was defined as the size that the air bubbles can maintain the volume stability over time. Based on the time-dependent change in the volume content of the larger bubbles within two hours after mixing, it was found that 500 μm was the critical dimension of bubbles. By adjusting the mortar mixing methods, a lower mortar viscosity was achieved while the total volume of fine and coarse bubbles were also reduced. In addition, when the blending ratio of defoaming agent and air-entraining agent was within the range of 0.50-0.54, the bubble structure of the cement-superfine slag powder mortar had been significantly improved, and more fine bubbles and fewer coarse bubbles had been distributed in the mortar.
Mid-and Long-term Contract Decomposition to Promote New Energy Consumption
Authors: Yang Chunxiang , Wu Feng , Han Jie , Wu Guodong , Wang Yang , Zhang Tianyu
Published: December 2019

With the increase in China’s new energy installed capacity, the pace of domestic power market reform is also steadily accelerating. Having the feature of randomness, volatility and intermittency which makes power generation fragmented, higher risks occur when new energy generation is involved in spot market. The proposal of a new round of electricity reform also brings great challenges for The Independent System Operator (ISO), including decomposing mid- and long-term contract curve which not only requires consideration of monthly electricity balance but also makes the curve conform with the power forecasting to the greatest extent. The Independent System Operator should formulate reasonable mid- and long-term curve decomposition combined with the signed contracts as well as ensure reasonable and fair income of new energy plants in spot market to increase their enthusiasm in the market in the process of decomposing mid- and long-term contract curve.
New energy consumption analysis based on impedance type electrical distance
Authors: Ma Zhiqi , Xia Bing , Shi Zhongzhi , Wang Ling , Li Ming , Sui Zhenwei , Li Bing , Jin Manyu , Zhang Wenying , Bao Hai
Published: December 2019

All along, electrical distance is used to characterize the electrical tightness between two nodes, widely used in reactive power partitioning and reactive power location. In fact, the electrical distance can also be used to select new energy access points. Most of the existing electrical distances are also calculated by the sensitivity method. The electrical distance obtained by the sensitivity method lacks the concept of space and the calculation is not accurate. The new electrical distance calculated by the equivalent transmission impedance not only reflects the close relationship between the two power quantities, but also has the concept of “distance”. It is persuasive and has a wider application range. This paper will use the new electrical distance, apply to the selection of new energy access points for the 6-node distribution network, and build a consumption analysis map to track and analyze the consumption of new energy.
Assessing the Functions of Pumped Storage Power Stations in Power System Based on Fuzzy Comprehensive Evaluation
Authors: Yang Jie , Yan Xiaoqing , Li Guanqi , Zheng Kuan , Zhang Fuqiang
Published: December 2019

Pumped storage power stations play an important role in the power system, such as ensuring safety, regulating peak and valley, and promoting the absorption of new energy. Quantitative analysis of the function of pumped storage power station is of practical significance for its healthily and orderly development. Therefore, this paper puts forward a functional evaluation model of pumped storage power stations in the power system. Firstly, the present evaluation system of pumped storage power stations is analyzed. Then, a functional index system is established from the physical and mathematical aspects, and a fuzzy comprehensive evaluation method based on AHP is proposed. Finally, the paper makes an empirical analysis of the above methods by taking the actual operation of typical pumped storage power stations in north China, east China and northeast China as examples.
Research on Renewable Energy Quota System and Power Coordination Transaction
Authors: Bo Pang , Zhu Li , Jing Zhao , Dunnan Liu , Genzhu Li , Wenzhuo Wu
Published: December 2019

On May 10, 2019, the National Development and Reform Commission and the State Energy Administration promulgated the Notice on Establishing and Perfecting the Guarantee Mechanism of Renewable Energy Power Consumption, which opened the prelude to the implementation of the renewable energy quota system in China. The emergence of renewable energy quota trading market will greatly affect the traditional electricity market trading mechanism which only considers electricity trading. In order to promote the optimal allocation of power resources, this paper aims at the coordinated transaction between renewable energy quota and electricity. Firstly, it analyses the relationship between renewable energy quota market and electricity market, and the impact of renewable energy quota on power trade is explored. Secondly, renewable energy quota execution and assessment are elaborated. The basic principle of quota and electricity coordinated trading; finally, according to China’s national conditions, the paper puts forward countermeasures for the construction of the coordination mechanism of electricity trading and quota trading, and provides direction and suggestions for the implementation of renewable energy quota system in China.
Studies on callus induction of Valeriana officinalis under different disinfection methods and photoperiod conditions
Authors: Yang Jiali , Zhang Yaosheng , Gu Ye , Wang Changbao
Published: December 2019

Using tender leaves of Valeriana as explants, 70% ethanol and 0.1% mercury as disinfectants, the effects of different disinfection methods and photoperiod on callus induction of Valeriana were studied. The rresults show that when C3 group was used to treat explants, the pollution rate and browning rate are lower, the callus induction rate was the highest. When the photoperiod was 0h/d, the healing time was the shortest, and the callus quality was the best in the experimental group, which was more conducive to the next step. The optimal disinfection combination is to soak the explants in 70% ethanol for 30 s and then soak them in 0.1% mercuric chloride for 7 min. The optimum photoperiod is 0h/d.
Effects of different aquasorb on germination and drought resistance of lavandula Angustifolia seeds
Authors: Li Zeyu , Ren Guoli , Gu Ye , Wang Changbao
Published: December 2019

Experiments were carried out to simulate the effects of three water-retaining agents on germination and drought resistance of Lavandula seeds. The germination rate, germination potential, germination index, and the changes of catalase and amylase activities during germination were observed after treatment with water-retaining agent. Our results show that (1) the use of a suitable water retention agent can promote the germination rate of Lavandula seeds, and the best germination result is obtained by using water retention agent B in 0.25%. (2) The peroxidase activity after using the water-retaining agent was lower than that of the control group; meanwhile, the amylase activity was higher than that of the control group. The best treatment results of water-retaining agent A, B and C are 0.5%, 0.25%, and 0.1%, respectively. We conclude that the water-retaining agent B in 0.25% is optimum concentration for Lavandula seeds.
Research status of polymer permeable cement concrete
Authors: Yankun Zhang , Yue Li , Hui Wang , Weili Shi
Published: December 2019

In this paper, the development of polymer permeable cement concrete is summarized, and the research progress and achievements at home and abroad are introduced. In the end, it summarizes the current development situation and the deficiencies in the research, and makes a prospect for the future development.
Separating and Purifying of Endophytic Fungi from Ginkgo Biloba and Screening of Flavonoid-Producing Strains
Authors: Zhang X.Y. , Li X. , Han M.M. , Cai Z.Y. , Gao X. , Pang M.X. , Qi J.H. , Wang F.
Published: December 2019

In order to screen the endophytic fungi of ginkgo biloba with high flavonoid yield, the surface of the sample was disinfected by immersing with 75% ethanol, 3% sodium hypochlorite and sterile water alternating. The endophytic fungi of ginkgo biloba were separated by tissue culture method. 47 strains of endophytic fungi were obtained, and 16, 17 and 14 strains were found in the branches, leaves and roots respectively. The flavonoid-producing strains and its content of total flavonoids in the fermentation broth were determined by chromogenic reaction and colorimetric method of aluminum chloride respectively. Finally, four strains with the highest flavonoid-producing (Y6, Y8, Y10 and G8) were screened, and theirs total flavonoids content in the fermentation broth were 25.33±1.29 mg/L, 32.04±1.38 mg/L, 20.48±0.83 mg/L and 20.19±1.59 mg/L respectively.
Study on the Scale of New Energy Development during the 14th Five-Year Plan Period
Authors: Mi Zhe , Yuan Bo , Zhang Jinfang
Published: December 2019

A major issue in the successful realization of energy transformation in the 14th Five-Year Plan period is to solve the problem of optimizing the allocation and coordinated development of new energy and flexibly adjusting resources. During the 14th Five-Year Plan period, if the current new energy installation distribution ratio of the eastern and western regions is still maintained, it will be very difficult to control the overall curtailment rate of the new energy in the State Grid Management area below 5%. Another development option is to further tilt the installation of new energy towards the central and eastern regions, make full use of the local accommodation space in the central and Eastern regions. It is easier to achieve the total curtailment rate of new energy within 5%, and at the same time, the total installed capacities of new energy in the whole country can be further increased. It is also suggested that during the 14th Five-Year Plan period, the curtailment rate restriction should be relaxed to 8% moderately, which not only has better overall system economy, but is conducive to supporting a larger scale of new energy development and increase the proportion of new energy generation in total power generation.
Efficiency of dynamic compaction on high backfilled ground in VSC-HVDC BTB convertor station
Authors: Jinhu Yang , Wei Zhai , Wen Jiang , Guangbing Xu
Published: December 2019

To evaluate the effect of dynamic compaction on high backfilled ground in VSC-HVDC BTB convertor stations, a modified numerical simulation procedure was proposed with the changes of stiffness and strength considered reasonably. Simulation results show that dynamic compaction is substantially efficient to high backfilled ground treatment in VSC-HVDC BTB convertor stations. There are critical tamping times in dynamic compaction. When tamping times are higher than the critical number, further increase of tamping times contribute little to the holistic improvement of foundation. With the increase of drop energy, the bearing capacity of the improved ground raises exponentially. These findings can be helpful for the foundation design of future VSC-HVDC BTB convertor stations.
Evaluation of Development Effect of Weak Base ASP Flooding In Secondary Oil Reservoirs
Authors: Yu Wang
Published: December 2019

A set of EOR technologies have been formed in a development area after the exploitation of ASP pilot zone and industrial demonstration zone. Since 2015, the industrialization promotion of weak base ASP flooding has been realized. At present, 4 blocks have been invested and all of them have achieved good development effect. In order to better understand the rule of ASP flooding, further broaden the EOR potential and guide oilfield development more efficiently, this paper will evaluate the ASP flooding development effect and summarize the dynamic change law based on an existing block. The results show that after entering in low water period, the injection pressure rises above 25%, the inhaled index falls to 45% above, the liquid producing index falls 36.3% on average, comprehensive water cut largest decline reaches 12.36%, oil increase letter number reaches one time above. At the end, the paper gives the classification response characteristics of well group, and provides a basis for other weak base ASP flooding blocks.
Development and Application of SZ-type double-back straight tower with live replacement overhang insulator suspension line card
Authors: Jun Ma , Yonggang Shi , Gang Dong , Fuxing Gong , Kegang Wei , Xin Su , Yu Ding , Zhu Wang
Published: December 2019

In recent years, SZ-type tower and other angular-type cross-bearing head plus slings of the cross-stretcher structure of the tower on-line has been widely used. However, there is currently no special card in line with it. Therefore, this paper puts forward the use of aluminum alloy as a material developed that can be stuck in the cross-stretcher head of the 220 kV SZ-type double-back straight tower with live replacement overhang insulator hanging line card. It includes a screw lever, a wire lever with a hook hook in the lower part of the bar, and a screw lever connected to a crossbar card. The cross-stretcher mount has a cavity in the middle and a screw seat on both sides, with each screw lever standing on the screw seat when used. The cross-load mount holder is on the sZ-type double-back straight-line tower cross-mounted plate, which can be used for installation on the SZ-type tower. It provides a screw hanging point when the SZ-type tower is charged to replace the insulator. It has the characteristics of simple structure, reasonable and safe use.
Application of MATLAB in Solving Linear Equations
Authors: Deng Huilin , Li Lifeng , Zhang Xiaohu
Published: December 2019

In order to cultivate the interest of science and engineering students in learning the direct and iterative methods of solving linear equations, this paper takes the OBE education concept as the guiding ideology and summarizes and discusses how to solve linear equations with MATLAB relevant instructions.
A Simple Method of Signal Control for Rotary Interchange
Authors: Jin Yi , Han Xinyu , Wu Xuezhu , Zhang Fei
Published: December 2019

The existing rotary interchange has the problems of heavy traffic and short weaving section. Taking the 2-level rotary interchange as an example, a simple two-phase signal control method is put forward by analyzing traffic conflict and calculating signal timing parameters based on Webster including requirement for the length of red intervals. The applicable road geometry of signal control method is also discussed. Finally, Vissim simulation and evaluation are carried out. Through comparing traffic operation before and after the optimization, the results show that the simple signal control method has a positive influence on rotary interchange traffic.
Patent Analysis of Intelligent Control Technology for Intelligent Refrigerator
Authors: Yao Xiao , Wu Jie
Published: December 2019

The global patented technology in the intelligent control field of intelligent refrigerators has problems such as uneven development and low activity of overseas patent operations. Enterprises cannot accurately grasp the technological development trend in the field of intelligent refrigerator intelligent control. Based on PatSnap patent database, in-depth analysis of patent application changes in the field of refrigerator intelligent control, overseas patent distribution in the world, distribution of key patent technologies and patent operations, to find out the hot technology in the field of smart refrigerator intelligent control Identify patent risks and provide valuable patent information for Chinese intelligent refrigerator companies.
An improved control method for Voltage Source Converter-High Voltage Direct Current system
Authors: Sun Yimeng , Liu Yingpei
Published: December 2019

This paper aims to enhance the accuracy and response speed of the active-disturbance rejection control (ADRC) controller of the voltage source converter-high voltage direct current (VSC-HVDC) system. For this purpose, an improved control method was proposed for the VSC-HVDC system based on the least squares support vector machine (LSSVM) optimization of the ADRC controller. First, the ADRC regulators were designed for the active/reactive power outer loop in VSC-HVDC inverter control system. Then, the LSSVM optimized regression model was created for the ADRC regulators. Finally, the proposed method was successfully simulated on MATLAB. The simulation results show that the LSSVM-optimized ADRC method can effectively enhance the anti-interference ability of the VSC-HVDC. The research findings shed new light on the signal analysis of the VSC-HVDC system.
Research on the Factors Influencing the Income Level of Urban Residents in Guangzhou
Authors: Zhong Jiayi , Zhong Jiayi
Published: December 2019

High-quality development is a new requirement for China’s economic development in the new era. This paper selects the ownership structure, urbanization level and openness as the influencing factors of urban residents’ income level in Guangzhou, and uses vector autoregressive model (VAR) to empirically analyze the mutual values between Guangzhou City’s 1998-2017 variables and urban residents’ income levels. The results show that the two-way causal relationship between urban residents’ income level and urbanization is the most significant. The change of ownership structure has the highest contribution to the fluctuation of urban residents’ income level, and on this basis, relevant policy recommendations are put forward.
Study on the Opening Position of the Same Median Strip at the Exit of the Passenger and Truck Separation Integrated Subgrade Interchange
Authors: Pan Binghong , Ren Hui
Published: December 2019

In order to avoid the traffic disorder and traffic accident caused by the weaving from the same median strip openings to the interchange exit segment, this paper analyzes the structure from the same median strip openings to the interchange exit, and explores the influencing factors of the opening position. By analyzing the configuration, operating state and volume to capacity ratio, the calculation model of the minimum length of the weaving segment is established. Based on the number of lanes and design speed, the proposed value of the opening position of the same median strip at the exit of the passenger and truck separation integrated subgrade interchange is proposed.
Probability model of driver’s choice behavior in toll plaza
Authors: Liang Hanmian , Yang Shaowei , Pan Binghong
Published: December 2019

By analyzing the driver’s choice behavior at toll plaza, the complexity of driver’s toll lane selection behavior is discussed, and the utility function and probability calculation formula of the model are determined. The queue length, the number of lanes changed, the number of large vehicles and the location of the toll lane are selected as the characteristic variables of the model. The binary Logit model of the driver’s choice behavior for the toll lane is established. Based on the actual observation data, the model parameters were estimated for each characteristic variable. The research results show that the driver’s toll lane selection behavior is affected by many factors, and the fitting accuracy is high. The establishment of the model provides technical support for the traffic organization and toll lane layout.
Identification classification of power user demand response effect based on electricity acquisition data
Authors: Ge Rui , Jin Yiding , Feng Changyou , Zhao Zhao , Wang Nan , Li Pengfei
Published: December 2019

In recent years, the great potential of power demand-side resources in the power system has been gradually recognized and exploited, especially the demand response of power users. Demand-side management has received more and more attention. In order to clarify the rationality of the requirements response project design and the degree of implementation of the expected effect, this paper studies the demand response characteristics of powerusers’ electricity load. Based on the processing of load data using the analysis technology, the demand response feature indicator is proposed, taking into account the response capacity, response speed, response cycle, and using K-means clustering method to realize the identification and classification to the effect load response of users, and finally give power users demand response interactive Policy.
Market demand assessment of auxiliary services after large-scale wind power access
Authors: Li Qiwang , Li Jing , Liu Dunnan , Zhao Ningning , Zhihao Li
Published: December 2019

Since the beginning of the 21st century, wind power has flourished as a major form of new energy. Different from thermal power, hydropower, nuclear power and other power sources, wind power output is characterized by intermittence and volatility, low reliability of capacity, and poor predictability, which will bring additional pressure to the safe and stable operation of the power system, thus restricting its development. In order to improve the consumption capacity of renewable energy, China is building an auxiliary service market based on economic leverage to encourage flexibility resource participation in system regulation services. Demand assessment has also become a key issue in market construction. Therefore, this paper will take the peak regulation auxiliary service market and reserve auxiliary service market under large-scale wind power access as examples to evaluate the peak regulation and reserve demand.
Experiment Research on Direct-expansion Evaporative Condensation Air-conditioning System
Authors: Yu Wenhong , Wang Haoyu , Zhang YiXiang
Published: December 2019

This paper introduces the working principle and characteristics of the direct-expansion evaporative condensation air-conditioning system, and an relative experimental research has been conducted. The result shows the direct-expansion evaporative condensation air-conditioning system has the advantages of energy saving, water saving, land saving, compact structure and low pollution. Therefore, the direct-expansion evaporative condensation air-conditioning system has great potential for use and it also has the capacity in automation controls.
Research of rational curtailment rate and development guiding mechanism of wind power in China
Authors: Cheng Jinmin , Wang Weiyuan , Yuan Bo , Zhang Jinfang , Mi Zhe
Published: December 2019

It is not conducive to green low-carbon development to pursuit very low wind power accommodation rate regardless of cost. In order to improve the efficiency of wind accommodation and realize the coordinated development of wind power and power grid, a “rational curtailment rate” of wind power should be studied and evaluated. This work proposes that the “rational curtailment rate” of wind power should be defined as a curtailment rate when the marginal wind power accommodation cost equals to the marginal wind power accommodation benefits at given level of installed wind capacity. The rational curtailment rate is related to the system peak shaving capacity and installed wind capacity. According to the rational curtailment rate, three development strategies are proposed to guide the improvement of wind power accommodation level and energy supply efficiency: First, calculate rational curtailment rate separately in every provinces, and establishing early warning standards for wind power construction differently. Second, the idea of wind power development should be adjusted to “adjust resources flexibly first”. Third, set up different wind power investment guidance for in different areas, indicated by rational curtailment rate.
3D modelling analysis of sea-level rise impact in Semarang, Indonesia
Authors: Karondia L A , Handoko E Y , Hapsari H
Published: December 2019

Regarding the Intergovernmental Panel on Climate Change reports that sea-level may reach up to 74 cm in 2100. This prediction may be a crucial indicator for countries whereas located in low-lying areas. Due to the significant impact on economics and social, sea-level rise can be a severe problem in the future. Some of the big cities in Indonesia are in the coastal areas, such as Jakarta, Surabaya, and Semarang. They become the vulnerable city in Indonesia, which is affected by sea-level rise. The aim of the study is to model and analysis the impact of sea-level rise, particularly in Semarang city, Indonesia. In this study, sea-level rise can be estimated by satellite altimetry data for a long-term period. The impact of sea-level rise can be modeled and visualized using 3D modeling. The prediction over 50 years, the areas impacted by sea-level rise is about 807 km2. They mostly cover in the northern of Semarang city.
The study of SSC patterns on coastline changes in Socah Gulf using Landsat imagery and in-situ data
Authors: Taufik M , Nugraini L D , Pratomo D G , Bioresita F
Published: December 2019

Socah as an economical buffer in Surabaya Metropolitan Area becomes one of important sub-districts in Bangkalan. As a shallow coast, this area is predicted to have significant coastline changes and a unique sedimentation pattern. This research aimed to analyze the sedimentation pattern and coastline changes in Socah. The 30 m of Landsat imagery was used in this research to observe sedimentation pattern that is represented by a suspended sediment concentration (SSC) trend from 2013, 2015, and 2018. Landsat images were also used to monitor the coastline changes in Socah starting from 1994 to 2018. From the sea color analysis, SSC values in rainy season are higher than those in dry season. The difference of SSC average between two seasons, in three stations, is 127 mg/L. SSC values in 2018 is also higher than those in previous years, with difference up to 94,17 mg/L in dry seasons and 357,67 mg/L in rainy seasons. Based on coastal changes calculation in the MHWL position from 1994 to 2018, the coastline changes in Socah reaches +5,325 m at a rate of about 0,26 m/yr. Coastline changes in Socah cause the area increase in 2018 up to 3,534 ha or 0,06% bigger than that in 1994. Those changes are dominated by accretion in Junganyar, Buluh, and Penarjuh Villages.
Analysis of changes in land value of land use permit (IPT) with tax object sale value (NJOP) 2018 using market data approach (Case Study: Pucang Sewu Village, Gubeng Sub-District, Surabaya)
Authors: Deviantari U W , Salsabila R D , Dediyono A
Published: December 2019

Surabaya has land management rights called land use permit (IPT) or Certificates. Land use permit (IPT) is different from the status of the other land rights. NJOP market price is also obtained from Fair Market Value that have been calculated by the government. To find out the change in land value of IPT with NJOP, market data approach method is used to discuss market data in each zone that has been classified. The results of the analysis that have been done show that the highest average indication value (NIR) is Rp 34,951,545. The land value of IPT also influences the changes in land values towards NJOP. The highest increase in the GP1 zone is 1,782.65% and the lowest in the GP13 zone is 10.95%. This is caused by factors that affect the land value those are land rights, land location and road accessibility in Pucang Sewu.
The tsunami prone area for marine tourism activities (case study: Tulungagung District)
Authors: Budisusanto Y , Pribadi C B , Dianita R
Published: December 2019

Tulungagung District is one of the regions that has a coastal area that is used for various activities, one of which is marine tourism. Tulungagung District is located directly facing the Indian Ocean has the potential for a disaster, especially a tsunami. The level of tsunami disaster risk in coastal areas and sea space in which the majority is used for tourism can result in loss of life, treasure, and property for people who live on the coast. This study identifies the use of marine and coastal space, especially for marine tourism activities and analyzes the level of risk based on the area that has the potential to threaten the tsunami disaster. This study resulted in a very high-risk area affected by the tsunami disaster with the top regions, namely in Besole Village which is used for Popoh Beach tourism, Sidem Beach, Fishing Port, settlement, aquaculture, and Floating Net Cages with the area affected the impact is 55,536 ha. Equipped with an evacuation route to the gathering point and TEA (Final Evaluation Place).
Estimation of sea-level variability around the Java Sea and Karimata Strait using Cryosat-2 Altimeter
Authors: Pampanglola S M N T , Handoko E Y , Yuwono
Published: December 2019

Sea-level rise is a big problem in the future. Indonesia is a country with the potential impacts of sea-level rise; therefore, the continuous monitoring of sea-level variability becomes urgent. Globally, sea-level rise is up to 3 mm year−1 estimated by satellite altimetry data. How about the sea level rise in Indonesia, particularly in western Indonesia such as Java sea, Karimata Strait? This paper aims to estimate the sea-level rise in the western Indonesian seas, such as the Java Sea and the Karimata Strait. The estimation was derived using the Cryosat-2 altimetry data. The data used is in a period of 9 years (2010 to 2018). The trend in the period is negative 4 mm year−1. The area also has a low correlation with ENSO with a value negative 0.25
The Comparation of Low Water Level Based on Observation Time Variations in Jakarta
Authors: Khomsin  , Pratomo D G , Marantika H A W
Published: December 2019

The implementation of the sea toll program positively encourages the development of new marine infrastructure along the area it passes. One of the problems that arise in the development of new marine infrastructure is the unavailability of chart datum values. Therefore, there is a need for tidal observations to determine the value of the chart datum in the area. This study contains a comparison of the value of the chart datum from data of 15 days, 30 days, three months, six months, and one year in the Jakarta waters. This study is using data from Jakarta tidal station of BIG. The results of this study can be used to consider the efficiency of tidal observations, especially in determining the duration of observation. The value of the chart datum (LWL) is calculated from the tidal component generated from the harmonic analysis using MATLAB. Significance test for chart datum resulted from MATLAB carried out in Excel. The average value of LWL in Jakarta waters from 15 days data is 0.104 meter, 30 days is 0.192 meter, three months is 0.216 meter, six months is 0.221 meter, and one year is 0.222 meter. The most significant difference from the LWL result is 0.118 meter from 15 days and one year’s data, and the smallest difference is 0.001 meters from six months and one-year data. The significance test determined that observation time variations didn’t have a significant influence on chart datum (LWL) values that resulted. So, this study determines that we can only choose 15 days, or 30 days tidal observation despite three months, six months, or one year’s tidal observations to result in Low Water Level value for a place.
The use of a MLP neural network for analysis and aodeling of land use changes with variations variable of physical and economic social
Authors: Subiyanto S , Sukmono A , Bashit N , Amarrohman F J
Published: December 2019

Modeling the land use changes is a method that used to understand the causes and effects of dynamic changes. The model in this research is the ANN model with Multi-layer Perceptron (MLP) network architecture and backpropagation algorithm. The Artificial Neural Network (ANN) method is a potential method for land change as well as test the predictive abilities that will be produced by the model. Land use change modeling uses a combination of ANN and GIS methods. The aim of this research are (1) predict land use and land use change in Banyumanik District in 2011, 2015 and 2019, (2) build the land use model using the ANN method and (3) predict of land use in Banyumanik District in 2027. To predict the land use change is use Markov Chain models. The purpose of modeling land changes is as well as the factors that drive these changes. Some of the drivers of land use changes are physical and socio-economic variables. Physical variables are distance to road, distance to river, distance to agricultural and vacant land, elevation, slope, and climate. Whereas the economic variables are population density, and market land prices. Physical data variables obtained from high resolution satellite image processing. For socio-economic variables data are obtained from statistical data and field surveys. In this research, the model is carried out in a framework with various variables that are different, so that the best model is obtained. Cramer’s V value each variable is tested to see the relationship between these variables.
Preliminary coseismic deformation associated with the July 7th2019 M7.0 north Maluku earthquake
Authors: Susilo  , Meilano I , Daryono  , Efendi J , Sarsito D A , Basuki A Y
Published: December 2019

The 2019 July 7thNorth Maluku earthquake with M7.0 occurred in the Sangihe double subduction zone. The earthquake epicenter is located at latitude 0.54 N and longitude 126.19 E. Here, we employ continuous Global Positioning System (cGPS) observations to estimate coseismic deformation associated with the North Maluku earthquake. Using 6 days cGPS observations before the event and 6 days cGPS observations after the event we estimate coseismic deformation at 4 nearest cCGPS stations. The coseismic deformation for CTER (Ternate) cGPS stations which located about 134.80 km from epicenter is about 8.4 mm to north-west direction, while the coseismic deformation for CBIT (Bitung) cGPS station (about 151.68 km from epicenter) is 8.3 mm to the south-east direction. Coseismic deformation for another two cGPS stations (CTBL/Tobelo and CTHN/Tahuna) are about 3.0 - 3.6 mm. This value is very important to maintenance the Indonesian geodetic control network in Indonesia and earthquake studies in Indonesia.
Inverse Distance Weighting interpolation on the optimum distribution of kernel - Geographically Weighted Regression for land price
Authors: Handayani A P , Deliar A , Sumarto I , Syabri I
Published: December 2019

Land, as a commodity, has high economic value that was rapidly changing. It requires a model of land price estimation that can counterbalance the demand. The model of land prices can be formed by calculating the proximity distance between land parcels to parameters that gave an effect on surrounding price changes, such as infrastructure and other public facilities. GWR (Geographically Weighted Regression) is a spatial analysis technique based on a regression method that used in this study. Using GWR, the boundaries of the surrounded land area will determine in the form of bandwidth values. The bandwidth is analogous to the radius of a circle, with the point of the land that will be estimated as the center. This bandwidth plays an important role to determine how far the distance or how many points will influence the price of a land area. The estimation of land price is conducted by assign a weight to the price of other parcels which are within the bandwidth range following the Kernel weighting function, Bi square, and Gauss. The land price bandwidth obtained is then interpolated using the IDW (Inverse Distance Weighting) method to form the bandwidth model of the entire study area. Weighting with Adaptive kernel Bi-Square gives better results compared to Adaptive Gauss kernel.
Volcano deformation monitoring using geodetic method: optimal network design
Authors: Sarsito D A , Kriswati E , Meilano I , Andreas H , Pradipta D
Published: December 2019

Until nowadays there is no analytical equation that exactly state number of observing stations that should be installed and how the stations should be spatially distributed in the GNSS geodetic survey for volcano deformation studies. Due to the uniqueness of the deformation pattern of any volcano, which need sensitive monitoring network to detect small changes, the network design depends strongly on the uniqueness underlying physical phenomena. In this research, the geodetic network is designed based on physical equations to find the source including a simple spherical source of Mogi model and 3D-dislocation equation of Okada model for dykes and sills. In principle, those physical equations are used to represent the volcano deformation phenomena from surface horizontal and vertical displacement measurement. Furthermore, those physical equations are used for a reference design and realization of monitoring network. Our calculation applied at Agung and Batur volcanoes show that minimum number of observing stations depends on the total number of parameters, the combination of source shape assumption and field situation and need different type of densification in the next future measurement.
Analysis of the impact of land cover on Surface Temperature Distribution: urban heat island studies i}n Medan and Makassar
Authors: Muzaky H , Jaelani L M
Published: December 2019

The increasing number of an urban population in Indonesia causing Urban Heat Island (UHI) phenomenon that has to be the concern for the local government. Urban Heat Island is a phenomenon of the surface and thermal air climate that is warmer than the surrounding non-urbanized areas due to population density. This phenomenon is identified by the growing number of impervious surface area that can store heat energy better than any other surface area. A ground-based temperature monitoring system can observe this symptom but on a smaller scale. If we want to monitor the UHI in a larger spatial scale, we need to set up a much more ground-based temperature monitoring system, and that would cost too much money. Satellite-derived Land Surface Temperature (LST) may be the solution to this problem. In this study, the UHI phenomenon was examined in two cities in Indonesia: Medan and Makassar using Landsat 8 OLI/TIRS imagery. The Single Channel Algorithm (SCA) was used to retrieved LST data. Spectral indices such as Normalized Difference Vegetation Index (NDVI), Modified Normalized Difference Water Index (MNDWI) and Visible Red –Near Infrared Build up Index (VrNIR-BI) were used. The mean LST in Medan and Makassar was 30.46°C and 30.76°C respectively. The study revealed that mean LST in the vegetation area was the coolest among the impervious and the mixing area. The Pearson Product Moment Correlation to analyze the relationship between land cover that is represented with NDVI values and LST in those study area shows that they have negative relationship. The correlation coefficient between NDVI values and LST in Medan and Makassar was -0.65; and -0.63. While the correlation coefficient between VrNIR-BI values and LST in Medan and Makassar was 0,65 and 0,63 respectively.
SAEnet: an application for adjustment of horizontal network using particle swarm optimization algorithm
Authors: Hafid A , Sari D N I , Sobatnu F
Published: December 2019

The horizontal network of control stations plays an important role in geometric measurement activities, such as determining positions of point, distance, area, or even volume. One of the methods of determining horizontal network values is the least squares method. The method of least squares is one of the most frequently used methods to obtain unique estimates for a set of redundant measurements. The equations that are used in the horizontal network surveys are the nonlinear equations so it must be linearized in order to be computed using least squares method. The problem that arises when linearizing the nonlinear observation equation is the approximate coordinates of the network stations are needed for its computations. In order to handle this problem, the Particle Swarm Optimization (PSO) algorithm is applied as an algorithm for determining the approximate coordinate values of the network stations. The algorithm of PSO is a heuristic function that optimizes a problem by iteratively trying to improve a candidate solution toward the best solutions. The advantages of PSO are that PSO is designed for solving a problem more quickly when classic methods are too slow and finding an approximate solution when classic methods fail to find any exact solution. This paper presents the design of an application for horizontal network adjustment using PSO algorithm, namely SAEnet. The Algorithm was written in Matlab which is very effective in matrix manipulation and has been widely used in various fields of numerical computations. The computation of horizontal network adjustment using SAEnet application consists of determination of initial approximation values using PSO and the adjustment computation using the least squares method. SAEnet is also equipped with save menu to Microsoft Excel format and load menu from Microsoft Excel format. The test shows that the input and output of the program can run as expected. The results are then compared to other program, like STAR*NET, using a variety of data sets. The results of both computations show the maximum difference between both programs is 0.000040 while the average difference is 0.000020. The test shows that there is no significant difference between the results of the SAEnet and STAR*NET computation. Hence, SAEnet can be used for horizontal network adjustment computation.
Simulation Analysis for evaluating Smart technique of Energy Performance in Egypt
Authors: Mahmoud Ayman , Elkhiary Ayah
Published: December 2019

Building envelopes acts as the boundary between the outdoor environment and the indoor working spaces. The smart thing to do is think in terms of interaction, minimum use of materials and energy to reduce the environmental impact of this major human activity called building. Smart materials technologies are the keynote to 21st-century economic improvement. This paper represents a smart method to simplify the invention of design concepts and develop the improvement of building envelopes that are better suited to their environments. Smart envelopes can significantly increase levels of functionality, which include smart material of envelopes, play a significant role in the way systems adapt to environmental conditions, and provide a multi- operative boundary to control heat. The aim of the paper to emphasize the functional role of smart envelopes for environmental adaptation provides an analytical study of the types of smart materials available, giving new insight into innovative methods and techniques, understanding the search for smart envelope applied in architecture, and adaptation of an environmental sustainability. In this study, a BASE CASE model simulated with “Design Builder” software based on “Energy Plus” with the application of Smart technique as a part of achieving sustainable buildings. The results showed that the smart application in Egypt had the main impact on enhancing performance and as a result, a reduction in energy usage.