Ultrafast Grocery Delivery
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This document summarizes a final project comparing ultrafast grocery delivery systems to traditional grocery delivery. It analyzes two alternative ultrafast delivery systems providing 15-minute or 30-minute delivery compared to a Whole Foods benchmark. The analysis includes customer and operator perspectives, demand simulation, vehicle routing problems, warehouse location selection, and cost comparisons. It finds that the ultrafast delivery systems have higher delivery costs due to increased travel distances but could be profitable with economies of scale or customer willingness to pay more for faster delivery.
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1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECT
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
TIME DIVISION MULTIPLEXING TECHNIQUE FOR COMMUNICATION SYSTEM
Time Division Multiplexing (TDM) is a method of transmitting multiple signals over a single communication channel by dividing the signal into many segments, each having a very short duration of time. These time slots are then allocated to different data streams, allowing multiple signals to share the same transmission medium efficiently. TDM is widely used in telecommunications and data communication systems.
### How TDM Works
1. **Time Slots Allocation**: The core principle of TDM is to assign distinct time slots to each signal. During each time slot, the respective signal is transmitted, and then the process repeats cyclically. For example, if there are four signals to be transmitted, the TDM cycle will divide time into four slots, each assigned to one signal.
2. **Synchronization**: Synchronization is crucial in TDM systems to ensure that the signals are correctly aligned with their respective time slots. Both the transmitter and receiver must be synchronized to avoid any overlap or loss of data. This synchronization is typically maintained by a clock signal that ensures time slots are accurately aligned.
3. **Frame Structure**: TDM data is organized into frames, where each frame consists of a set of time slots. Each frame is repeated at regular intervals, ensuring continuous transmission of data streams. The frame structure helps in managing the data streams and maintaining the synchronization between the transmitter and receiver.
4. **Multiplexer and Demultiplexer**: At the transmitting end, a multiplexer combines multiple input signals into a single composite signal by assigning each signal to a specific time slot. At the receiving end, a demultiplexer separates the composite signal back into individual signals based on their respective time slots.
### Types of TDM
1. **Synchronous TDM**: In synchronous TDM, time slots are pre-assigned to each signal, regardless of whether the signal has data to transmit or not. This can lead to inefficiencies if some time slots remain empty due to the absence of data.
2. **Asynchronous TDM (or Statistical TDM)**: Asynchronous TDM addresses the inefficiencies of synchronous TDM by allocating time slots dynamically based on the presence of data. Time slots are assigned only when there is data to transmit, which optimizes the use of the communication channel.
### Applications of TDM
- **Telecommunications**: TDM is extensively used in telecommunication systems, such as in T1 and E1 lines, where multiple telephone calls are transmitted over a single line by assigning each call to a specific time slot.
- **Digital Audio and Video Broadcasting**: TDM is used in broadcasting systems to transmit multiple audio or video streams over a single channel, ensuring efficient use of bandwidth.
- **Computer Networks**: TDM is used in network protocols and systems to manage the transmission of data from multiple sources over a single network medium.
### Advantages of TDM
- **Efficient Use of Bandwidth**: TDM all
哪里办理(csu毕业证书)查尔斯特大学毕业证硕士学历原版一模一样
原版一模一样【微信：741003700 】【(csu毕业证书)查尔斯特大学毕业证硕士学历】【微信：741003700 】学位证，留信认证（真实可查，永久存档）offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Unit-III-ELECTROCHEMICAL STORAGE DEVICES.ppt
Batteries -Introduction – Types of Batteries – discharging and charging of battery - characteristics of battery –battery rating- various tests on battery- – Primary battery: silver button cell- Secondary battery :Ni-Cd battery-modern battery: lithium ion battery-maintenance of batteries-choices of batteries for electric vehicle applications.
Fuel Cells: Introduction- importance and classification of fuel cells - description, principle, components, applications of fuel cells: H2-O2 fuel cell, alkaline fuel cell, molten carbonate fuel cell and direct methanol fuel cells.
Literature Review Basics and Understanding Reference Management.pptx
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
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Ultrafast Grocery Delivery
- 1. Final Project: Ultrafast Grocery Delivery Natalie Feng, Eric Wu Dec. 21, 2021
- 2. Traditional Grocery Store Existing Delivery Service Fast Delivery Service Mature: order 1 day beforehand, 1-2h delivery window -> New: 15-20 min fast delivery Grocery Shopping Experience
- 3. Ultrafast Grocery Delivery ● Faster delivery Service ● Smaller store size ● More locations ● Less SKUs (1000-2000s compare to 40000s in typical) ● Lower start cost ● Quick expansion (suburban) Grocery Shopping Experience Source: Ultrafast delivery: The $28B market to build the on-demand bodega. (n.d.). https://sacra.com/research/ultrafast-delivery-online-grocery-market/
- 4. Customer Perspective ● Place order at least 3 hours in advance ● Select an available delivery window ● Stay at home wait for the delivery Operator Perspective ● Gather all orders in the same delivery window ● Solve the Vehicle Routing Problem ● Assign to delivery drivers (Amazon app ordering page) Benchmark System - Whole Foods Market
- 5. Customer Perspective ● Place order and get an ETA ● Pickup order in 15-30 mins Operator Perspective ● Pass the order to shopper, pack the order; Assign the order to a delivery driver ● Shopper finish packing, hand the order to delivery driver (about 3 mins) ● Delivery driver hit the road for delivery Alternative Design - Ultrafast Delivery
- 6. Data Collection: Set Study Area Manhattan tracts vs Upper East Side Population distribution in Upper East Side tracts
- 7. Methodology Benchmark System Alternative System WholeFoods Stores 15 mins & 30 mins Ultrafast Delivery Capacitated Vehicle Routing Problem Location Allocation - Set Covering Problem ● Location of Whole Foods Stores ● Demand Simulation - 5W/2W ● Vehicle Routing - Optimal Distance ● Cost Analysis - Cost Function ● Weight-based Location Allocation ● Demand Simulation - 5W/2W ● Vehicle Routing - Optimal Distance ● Cost Analysis - Cost Function
- 8. Warehouse locations for 15-minute and 30-minute delivery service LSCP: Find Warehouses for Alternative Systems Tool: Python Package: spopt
- 9. VRP_Generate Random Demand Orders in each time-slot Weekday Weekend Situation 1 (140 orders/day) Low 0-15 3 2 Medium 15-35 3 2 High 35-50 1 3 Situation 2 (450 orders/day) Low 20-50 3 2 Medium 50-80 3 2 High 80-120 1 3 Demand Assumptions: 7 time-slots in a day, 2 hours per time-slot ● In Sacra’s report, it suggest a mature store should have a daily order of 500.
- 10. VRP_Run VRP for Each System Situation 1 (mi) Mon Tue Wed Thu Fri Sat Sun Total Whole Foods 29.64 29.25 29.61 31.95 30.09 34.38 35.72 220.64 30 min 108.91 102.93 109.15 105.88 112.03 136.06 151.45 826.38 15 min 168.02 154.21 170.68 163.33 168.84 227.16 233.54 1285.76 Situation 2 (mi) Mon Tue Wed Thu Fri Sat Sun Total Whole Foods 65.97 61.60 62.71 65.10 61.38 49.01 49.90 415.66 30 min 230.06 228.37 220.99 210.17 227.98 259.01 255.63 1632.19 15 min 384.61 368.96 393.09 349.65 373.93 440.18 431.66 2742.07 Tool: Python Package: ortools Average mileages from 3 random demand sets.
- 11. Cost Analysis: Evaluate Each System Alternative-15mins Alternative-30mins Benchmark-Wholefoods General Warehouse Rent: $150/yr/sqft; Bicycle Speed: 7.5 mph Processing time 5 mins 5 mins Not important Travel time 10 mins 25 mins 2 hrs Maximal coverage 1.25 mi 3.125 mi everywhere Deliver capacity 1 order/deliver 1 order/deliver 15 orders/deliver Deliver wage $30 per hr $30 per hr $40 per hr Delivery cost $4 per mile $4 per mile $5.3 per mile Cost Assumptions
- 12. Cost Analysis Average Mileage (mi) Unit Cost ($/mi) Delivery Cost Fixed Cost Total Whole Foods 294.19 5.3 $ 1,559.21 $ 25,000 $ 26,559 30 min 1101.84 4 $ 4,407.36 $ 9,375 $ 13,782 15 min 1714.34 4 $ 6,857.36 $ 12,500 $ 19,357 Situation 1: 3 sets of 7-day demand, computed average values 5.83x 3.75x
- 13. Average Mileage (mi) Unit Cost ($/mi) Delivery Cost Fixed Cost Total Whole Foods 554.21 5.3 $ 2,937.33 $ 25,000 $ 27,937 30 min 2176.25 4 $ 8,704.99 $ 9,375 $ 18,080 15 min 3656.09 4 $ 14,624.35 $ 12,500 $ 27,124 Situation 2: 3 sets of 7-day demand, computed average values 6.6x 3.93x ● More difference in mileage, Higher delivery cost. ● Increasing in order size leads to less profit margin. Cost Analysis
- 14. Discussion ● Assumptions on cost play a big role ● More travel mileage for a faster service ● Customers’ willingness to pay for a premium ● Stay competitive with the booming market